CA2214057A1 - Edge-lighted panel system - Google Patents
Edge-lighted panel system Download PDFInfo
- Publication number
- CA2214057A1 CA2214057A1 CA002214057A CA2214057A CA2214057A1 CA 2214057 A1 CA2214057 A1 CA 2214057A1 CA 002214057 A CA002214057 A CA 002214057A CA 2214057 A CA2214057 A CA 2214057A CA 2214057 A1 CA2214057 A1 CA 2214057A1
- Authority
- CA
- Canada
- Prior art keywords
- panel
- edge
- face
- diffusion
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
- F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
- F21Y2107/10—Light sources with three-dimensionally disposed light-generating elements on concave supports or substrates, e.g. on the inner side of bowl-shaped supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic lights
Abstract
ABSTRACT OF THE DISCLOSURE
An edge-lighted panel, useful as an illuminating panel or as an illuminated sign has a shallow peripheral frame which contains the light source. The frame supports an external, illuminated face panel on one or both its sides. A light diffusion panel located within the frame is interposed between the light source and the illuminated face panel, being inclined at a slight angle from the face panel, to refract light onto the inner surface of the face panel. Light emitting diodes (LED's) may be used as the light source. In the case of an illumination panel, a reflective interior panel may be used in conjunction with the diffusion panel to direct the light to the illuminated face.
The diffusion panel may comprise commercial diffusion sheeting normally used to enclose fluorescent lighting. The panel frame preferably comprises extruded plastic of modified U-section.
Portions of the sign face may be masked, in known fashion, to provide an illuminated sign or symbol, such as an exit sign or a directional arrow. Dual electrical connections for A.C. mains and batteries such as 12-volt or multiples can be provided.
An edge-lighted panel, useful as an illuminating panel or as an illuminated sign has a shallow peripheral frame which contains the light source. The frame supports an external, illuminated face panel on one or both its sides. A light diffusion panel located within the frame is interposed between the light source and the illuminated face panel, being inclined at a slight angle from the face panel, to refract light onto the inner surface of the face panel. Light emitting diodes (LED's) may be used as the light source. In the case of an illumination panel, a reflective interior panel may be used in conjunction with the diffusion panel to direct the light to the illuminated face.
The diffusion panel may comprise commercial diffusion sheeting normally used to enclose fluorescent lighting. The panel frame preferably comprises extruded plastic of modified U-section.
Portions of the sign face may be masked, in known fashion, to provide an illuminated sign or symbol, such as an exit sign or a directional arrow. Dual electrical connections for A.C. mains and batteries such as 12-volt or multiples can be provided.
Description
CA 022l40~7 l997-08-2~
EDGE-LIGHTED PANEL SYSTEM
BACKGROUND OF THE INVENTION
1. FIELD OF THE INVENTION
This invention is directed to a system for edge-lighted panels, ~h~ r~ t~ ed~e-li~hted panelE Euitable for use as illuminated EignS.
~ ~A~K~ N~ OF THE INVENTION
Widespread use is presently made of edge-lighted panelEr f~r illumin~ted Ei~nEf EUC~I ~E E~IT Ei~nEr ~nd for buEine~s EignE.
Many prior art illuminated signs have an arran~ement of incandescent lights located at their edges.
The illumination efficiency of such prior art arrangementE is quite low, and suffers particularly from non-uniform intensity across the face of the sign. Such lack of uniformity generally manifests as lower intensity illumination in areas of the sign face remote from the light source.
In the case of some exit signs incorporating emergency condition lighting, one or more incandescent lamps operate at regular household or "mains" supply voltage of 115-130 volts, and a supplemental incandescent lamp or lamp~ i~ wlred t~ ~n emergency low-voltage D.C. supply, frequently of stand-by batteries operating at voltages such as 12-volts, or multiples thereof. One such typical embodiment uses two 15-watt 115-volt lamps for normal operation, with one 30-watt, 12-volt bulb for CA 022140~7 1997-08-2 emergency standby operation.
The sign is about two lnches in thickness, usually having the regular, mains-supply voltage lamps located at one edge of the sign, being mounted to the sign frame, while the independently connected low-voltage lamps are located at another frame edge.
SUMMARY OF THE INVENTION
The present invention provides an edge-lighted panel having an illu~\in~ti~n f~e eur~ounded by a frame; a light source located inside the frame, and at least one diffusion panel having an arrangement of light diffusing cell elements over the inner, proximal surface thereof, the diffusion panel being interposed between the light source and the illumlnation face and inclined at a slight angle from the illumination face, to expose the obverse face of the diffusion panel to the light source, in use to diffuse light from the source in illuminating relatlon with the illumination face. The slight angle of inclination of the diffusion panel is in the range of about 3 to 1O degrees.
The preferred light source comprises light emitting diodes(LED's). The light diffusion panel for the edge-lighted panel of the present invention may have its inner, obverse face upon which the light is incident consisting of cell elements with concave incident faces, to diffract the light.
Alternatively, the light diffusion panel may have cell elements over its obverse face with conical incident surfaces.
CA 022140~7 1997-08-2~
Th~ ~ub~ct lll~ht diffu~l~n pan~ls u~u~lly hsve a EubEtantially planar light emitting outer face.
Off-the-shelf diffusion panel materials normally associated with fluorescent lighting panels may be used such as that of Liteline Corp. of - - - - , - - , U.S.A. (Part No K12-2~ CA).
In one edge-lighted panel embodiment the panel has a plurality of diffusion panels, as in the case of an edge-lighted panel having opposed illuminated faces. The diffusion panels may be arranged in joined, mutually supporting relation, in association with the particular arrangement of light sources, such arrangements including planar, triangulated and pyramidal formations.
It has been found that the edge-llghted panel may incorporate as its light source a plurality of LED lamps. The frame of the edge-lighted panel may comprise an extruded modified U-section channel having one or more diffusion panels secured thereto.
The diffusion panels may be secured to the frame, being mounted in a slot or slots forming a part of the modified U-section.
The frame slotted U-section is preferably of plastic.
In the case of a duplex, two-sided sign, two pairs of diffusion panels may be used, each pair having their adjoining inmost edges welded together in mutually triangulating relation with the slots of the frame channel, to provide a stable, narrow-based isosceles triangle diffuser.
CA 022l40~7 l997-08-2~
The components of thlE edge-llghted panel are readlly fabrlcated and assembled.
In the case of LED light sources, the lamps are preferably mounted on a prlnted circuit board.
The preferred LED lamps may be readily integrated into the ~tructure of the frame of the panel, to provlde a non-lntrusive light source at the perlphery of the panel.
In one em~odlment lt waE found that two 16-lamp banks of LED
lamps, one bank on each slde edge of the frame, gave substantlally equlvalent, but more unlformly dlstributed light intensity than a corresponding prior art Exit sign. However, the power consumptlon was 1.8 watts, versus the 30 watts of the equivalent prior art arrangement. The subject embodiment has the further advantage of havlng a panel thickness approximately half that of the prlor art. The LED lamps may be connected in a wlde range of circuitry. In the above-described embodiment a batch of four series-connected LED lamps are connected in lO mutual parallel relation with a like 4-lamp batch, and that 8-lamp combination is connected in parallel with a llke 8-lamp combinatlon, enabllng them to be connected by one set of leads to a 12-volt battery source, and by another set of leads to a 115-volt A.C. mains supply.
Both hlgher and lower mains supply voltages may be readlly accomodated by connectlon of the LED lamps ln selected, CA 022140~7 1997-08-2 predetermined clrcult~.
The use of incandescent or fluorescent lamps as the light sources, in combination with one or more diffusion panels also is contemplated.
The outer, lllumination face of the edge-lighted panel may be secured to the frame, at least a portion of the face being substantially translucent. A portion of the face may be masked, as in the form of a sign, to define one or more symbols or words. The subject edge-lighted panel may have a pair of mutually opposed illumination faces, the panel consisting of a peripheral frame; a light source located within the frame, and at least two diffusion panels, each having an arrangement of light diffusing cell elements over the inner, obverse surfaces thereof; each of the diffusion panels being interposed between the light source and a respective illumination face, being inclined at a slight angle from the face, with pairs of diffusion panels converging in joined relation, in use to receive light from the source in diffusing and refracting relation, to illuminate the adjacent illumination face. In the case of an edge-lighted panel having a single illumination face, perhaps for use as an illumination panel, the diffusion medium may comprise a first transparent diffusion panel, combined with a reflective panel in spaced apart relation behind the first diffusion panel, having the light source located between the two panels of the diffusion medim.
CA 022140~7 1997-08-2~
The reflectlve panel may have a plane, flgured or serrated reflective surface, the angular relations of the relective panel and of its multiple reflective surfaces with the diffusion panel being selected for optimum efficiency. In an arrangement of an illuminated sign having an opaque mask, which blanks selected areas of the outer, illumination panel, it iE
contemplated that the opaque mask may be located interiorly of the illumination panel, the inner side of the mask opague surface portions having light reflecting and/or directing surfaces, to enhance the light throughput of the illuminated portion of the panel. The edge-lighted panel may have the diffusion panel set at an angle of inclination from the illuminated face in the range of about 3 to lO
degrees.
One somewhat more simple arrangement of illuminated panel may have a single, diagonally arranged light diffusion panel. That diagonal panel may be a composite sheet, having one half of its diffusing surface in reverse relation to the other half.
Mechanical joining of the sheet halves, in the case of polyethylene sheet is readily carried out by way of a thermal weld.
The light emitting diodes serving as the light source of the edge-lighted panel may have angles of divergence from their polar axlE Eelected from the range 1~ through 30 degrees.
The diffusion panel cell elements for the edge-lighted panel CA 022140~7 1997-08-2~
may have incldent f~ceE that are of the known conc~ve~ coni~l or of other available profiled forms.
BRIEF DESCRIPTION OF THE DRAWINGS
Certain embodiments of the present invention are described by way of illustration, without limitation of the invention thereto other than as set forth in the following claims, reference being made to the accompanying drawings, wherein:
Figure 1 is a perspective view of an arrangement of pairs of diffuser assemblies in accordance with the present invention;
Figure 2 is a like view of a system frame to receive the assemblies of Figure 1;
Figure 3 is a like view of a mask and an outer illumination face panel for use with the elements of Figures 1 and 2;
Flgure 4 is an end perspective of one of the diffuser assemblies of Figure 1, showing also the associated LED
lighting;
Figure 5 is a section of the channel portion of Figures 2 and 4;
Figure 6 is cross section of a portion of a first type of diffusion panel material;
Figure 7 is cross section of a portion of a second type of diffuser panel;
Figure 8 is a plan view of a system embodiment incorporating a single, diagonal diffusion panel;
Flgure 9 is an end perspective of a reflective diffuser; and, CA 022140~7 1997-08-2~
Flgure 10 ls a schematlc clrcult dlagram of a dual-mode LED
arrangement for A.C and battery connection.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to Figure 1, a first embodlment of the present inventlon comprises a duplex edge-lighted assembly 10 having a pair of two-sided diffusion sub-assemblies 12.
E~r_h ~iffueion ~u~ e~bly 1~ h~ ~n e~t~uded e~e section 14, containing a light source ~not shown).
The edge sectlon 14 supports a unltary diffusion unlt, with two panels 16 that are welded at their edge juncture.
Referring also to Figures 4 and 5, the slotted form of the edge section 14, with its mutually opposed transverse slots 24 and two side grooves 26, and the edge weld 17 of the panels 16, are more clearly seen.
Also shown is a lamp assembly 20, comprising a printed circuit strip 22 and a plurality of LED (light emitting diode) lamps 23. The circuit strip 22 is mounted in sliding relation in the two slots 24 of the edge section 14.
The diffusion panels 16 are edge-mounted within the grooves 26 of the edge section 14. Due to the angular inclination of the panels 16 from the section 14 the panels 16 may be secured by friction forces in the grooves 26. In one embodiment the angle was sensibly four degrees tabout 3.8 degrees).
Figure 2 shows one form of frame 30 by which the assembly 10 may be mounted, within the U-channel sides of the frame 30.
CA 022140S7 1997-08-2~
Fi,~u~e ~ eh~wE ~n ~ute~ ~ed ~ e~ ~nel 3~ ~f tr~n~lucent plastic, and an inner mask panel 34, generally of metal, having a desired sign such as "EXIT" cut, stencil-fashion, by way of message apertures through the mask.
The mask 34 and panel 32 are secured to the frame 30 by any suitable means.
A like arrangement of mask 34, and panel 32 may be secured to the rear face of frame 30, to provide a double-sided sign.
The mask 34 may be located outwardly of the panel 32. However, with the mask 34 located inwardly of panel 32, the imperforate portions of the mask 34 inner face may be made reflective, as by painting it silver or white, or by the application of a reflective surface, to increase the light intensity within the frame 30, to thereby increase the light output through the mask apertures.
In the case of a single sided sign, the rear face thereof may be a closure panel of a light-reflecting nature.
Referring to Figures 6 and 7, these show the cell shape of the interior surfaces of the light diffusion panels 16, in two commercial forms of available diffusion panelling.
In Figure 8 there is illustrated a portion 40 of a side lighted panel system having a single planar diffusion panel 42, located diagonally in its frame 4g. The panel 42 may comprise a composite diffusion panel, each half having the cellular, CA 022l40~7 l997-08-2~
light-receiving surface exposed to the respective adjoining strip of LED lamps 23. It will be understood that the frame 30 may be dispensed with, the extruded section 14 serving also as the frame for the system. Referring to Figure 9, the lighting unit arrangement 50 comprises a strip 52 of LED lamps, shown in mounted relation upon a printed circuit board, and inserted within the U-section base.
One side panel 54 of the unit 50 comprises a diffusion panel 42; the reverse side panel 56 of the unit SO has a reflecting surface 58, illustrated in this instance as being the outer face of the side panel 56. It will be understood that the inner face of side panel 56 may be made the reflecting face.
Referring to Figure lO, a two-mode LED circuit 60 is shown.
four LED lamp gangs 62 are shown, each gang 62 comprising four LED lamps 23 connected in series. The LED lamp gangs 62 are connected as two opposed, parallel-connected banks, with rectifier diodes 66 therebetween.
The illustrated 12-volt D.C. (battery) low-voltage supply is connected to the two bridge terminals by way of rectifier diodes 68 and resistors 70. A common negative ground 71 is provides. The high-voltage A.C. supply, shown as being a 120-volt household service is connected across the bridge, through a capacitor 72 and resistor 74.
EDGE-LIGHTED PANEL SYSTEM
BACKGROUND OF THE INVENTION
1. FIELD OF THE INVENTION
This invention is directed to a system for edge-lighted panels, ~h~ r~ t~ ed~e-li~hted panelE Euitable for use as illuminated EignS.
~ ~A~K~ N~ OF THE INVENTION
Widespread use is presently made of edge-lighted panelEr f~r illumin~ted Ei~nEf EUC~I ~E E~IT Ei~nEr ~nd for buEine~s EignE.
Many prior art illuminated signs have an arran~ement of incandescent lights located at their edges.
The illumination efficiency of such prior art arrangementE is quite low, and suffers particularly from non-uniform intensity across the face of the sign. Such lack of uniformity generally manifests as lower intensity illumination in areas of the sign face remote from the light source.
In the case of some exit signs incorporating emergency condition lighting, one or more incandescent lamps operate at regular household or "mains" supply voltage of 115-130 volts, and a supplemental incandescent lamp or lamp~ i~ wlred t~ ~n emergency low-voltage D.C. supply, frequently of stand-by batteries operating at voltages such as 12-volts, or multiples thereof. One such typical embodiment uses two 15-watt 115-volt lamps for normal operation, with one 30-watt, 12-volt bulb for CA 022140~7 1997-08-2 emergency standby operation.
The sign is about two lnches in thickness, usually having the regular, mains-supply voltage lamps located at one edge of the sign, being mounted to the sign frame, while the independently connected low-voltage lamps are located at another frame edge.
SUMMARY OF THE INVENTION
The present invention provides an edge-lighted panel having an illu~\in~ti~n f~e eur~ounded by a frame; a light source located inside the frame, and at least one diffusion panel having an arrangement of light diffusing cell elements over the inner, proximal surface thereof, the diffusion panel being interposed between the light source and the illumlnation face and inclined at a slight angle from the illumination face, to expose the obverse face of the diffusion panel to the light source, in use to diffuse light from the source in illuminating relatlon with the illumination face. The slight angle of inclination of the diffusion panel is in the range of about 3 to 1O degrees.
The preferred light source comprises light emitting diodes(LED's). The light diffusion panel for the edge-lighted panel of the present invention may have its inner, obverse face upon which the light is incident consisting of cell elements with concave incident faces, to diffract the light.
Alternatively, the light diffusion panel may have cell elements over its obverse face with conical incident surfaces.
CA 022140~7 1997-08-2~
Th~ ~ub~ct lll~ht diffu~l~n pan~ls u~u~lly hsve a EubEtantially planar light emitting outer face.
Off-the-shelf diffusion panel materials normally associated with fluorescent lighting panels may be used such as that of Liteline Corp. of - - - - , - - , U.S.A. (Part No K12-2~ CA).
In one edge-lighted panel embodiment the panel has a plurality of diffusion panels, as in the case of an edge-lighted panel having opposed illuminated faces. The diffusion panels may be arranged in joined, mutually supporting relation, in association with the particular arrangement of light sources, such arrangements including planar, triangulated and pyramidal formations.
It has been found that the edge-llghted panel may incorporate as its light source a plurality of LED lamps. The frame of the edge-lighted panel may comprise an extruded modified U-section channel having one or more diffusion panels secured thereto.
The diffusion panels may be secured to the frame, being mounted in a slot or slots forming a part of the modified U-section.
The frame slotted U-section is preferably of plastic.
In the case of a duplex, two-sided sign, two pairs of diffusion panels may be used, each pair having their adjoining inmost edges welded together in mutually triangulating relation with the slots of the frame channel, to provide a stable, narrow-based isosceles triangle diffuser.
CA 022l40~7 l997-08-2~
The components of thlE edge-llghted panel are readlly fabrlcated and assembled.
In the case of LED light sources, the lamps are preferably mounted on a prlnted circuit board.
The preferred LED lamps may be readily integrated into the ~tructure of the frame of the panel, to provlde a non-lntrusive light source at the perlphery of the panel.
In one em~odlment lt waE found that two 16-lamp banks of LED
lamps, one bank on each slde edge of the frame, gave substantlally equlvalent, but more unlformly dlstributed light intensity than a corresponding prior art Exit sign. However, the power consumptlon was 1.8 watts, versus the 30 watts of the equivalent prior art arrangement. The subject embodiment has the further advantage of havlng a panel thickness approximately half that of the prlor art. The LED lamps may be connected in a wlde range of circuitry. In the above-described embodiment a batch of four series-connected LED lamps are connected in lO mutual parallel relation with a like 4-lamp batch, and that 8-lamp combination is connected in parallel with a llke 8-lamp combinatlon, enabllng them to be connected by one set of leads to a 12-volt battery source, and by another set of leads to a 115-volt A.C. mains supply.
Both hlgher and lower mains supply voltages may be readlly accomodated by connectlon of the LED lamps ln selected, CA 022140~7 1997-08-2 predetermined clrcult~.
The use of incandescent or fluorescent lamps as the light sources, in combination with one or more diffusion panels also is contemplated.
The outer, lllumination face of the edge-lighted panel may be secured to the frame, at least a portion of the face being substantially translucent. A portion of the face may be masked, as in the form of a sign, to define one or more symbols or words. The subject edge-lighted panel may have a pair of mutually opposed illumination faces, the panel consisting of a peripheral frame; a light source located within the frame, and at least two diffusion panels, each having an arrangement of light diffusing cell elements over the inner, obverse surfaces thereof; each of the diffusion panels being interposed between the light source and a respective illumination face, being inclined at a slight angle from the face, with pairs of diffusion panels converging in joined relation, in use to receive light from the source in diffusing and refracting relation, to illuminate the adjacent illumination face. In the case of an edge-lighted panel having a single illumination face, perhaps for use as an illumination panel, the diffusion medium may comprise a first transparent diffusion panel, combined with a reflective panel in spaced apart relation behind the first diffusion panel, having the light source located between the two panels of the diffusion medim.
CA 022140~7 1997-08-2~
The reflectlve panel may have a plane, flgured or serrated reflective surface, the angular relations of the relective panel and of its multiple reflective surfaces with the diffusion panel being selected for optimum efficiency. In an arrangement of an illuminated sign having an opaque mask, which blanks selected areas of the outer, illumination panel, it iE
contemplated that the opaque mask may be located interiorly of the illumination panel, the inner side of the mask opague surface portions having light reflecting and/or directing surfaces, to enhance the light throughput of the illuminated portion of the panel. The edge-lighted panel may have the diffusion panel set at an angle of inclination from the illuminated face in the range of about 3 to lO
degrees.
One somewhat more simple arrangement of illuminated panel may have a single, diagonally arranged light diffusion panel. That diagonal panel may be a composite sheet, having one half of its diffusing surface in reverse relation to the other half.
Mechanical joining of the sheet halves, in the case of polyethylene sheet is readily carried out by way of a thermal weld.
The light emitting diodes serving as the light source of the edge-lighted panel may have angles of divergence from their polar axlE Eelected from the range 1~ through 30 degrees.
The diffusion panel cell elements for the edge-lighted panel CA 022140~7 1997-08-2~
may have incldent f~ceE that are of the known conc~ve~ coni~l or of other available profiled forms.
BRIEF DESCRIPTION OF THE DRAWINGS
Certain embodiments of the present invention are described by way of illustration, without limitation of the invention thereto other than as set forth in the following claims, reference being made to the accompanying drawings, wherein:
Figure 1 is a perspective view of an arrangement of pairs of diffuser assemblies in accordance with the present invention;
Figure 2 is a like view of a system frame to receive the assemblies of Figure 1;
Figure 3 is a like view of a mask and an outer illumination face panel for use with the elements of Figures 1 and 2;
Flgure 4 is an end perspective of one of the diffuser assemblies of Figure 1, showing also the associated LED
lighting;
Figure 5 is a section of the channel portion of Figures 2 and 4;
Figure 6 is cross section of a portion of a first type of diffusion panel material;
Figure 7 is cross section of a portion of a second type of diffuser panel;
Figure 8 is a plan view of a system embodiment incorporating a single, diagonal diffusion panel;
Flgure 9 is an end perspective of a reflective diffuser; and, CA 022140~7 1997-08-2~
Flgure 10 ls a schematlc clrcult dlagram of a dual-mode LED
arrangement for A.C and battery connection.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to Figure 1, a first embodlment of the present inventlon comprises a duplex edge-lighted assembly 10 having a pair of two-sided diffusion sub-assemblies 12.
E~r_h ~iffueion ~u~ e~bly 1~ h~ ~n e~t~uded e~e section 14, containing a light source ~not shown).
The edge sectlon 14 supports a unltary diffusion unlt, with two panels 16 that are welded at their edge juncture.
Referring also to Figures 4 and 5, the slotted form of the edge section 14, with its mutually opposed transverse slots 24 and two side grooves 26, and the edge weld 17 of the panels 16, are more clearly seen.
Also shown is a lamp assembly 20, comprising a printed circuit strip 22 and a plurality of LED (light emitting diode) lamps 23. The circuit strip 22 is mounted in sliding relation in the two slots 24 of the edge section 14.
The diffusion panels 16 are edge-mounted within the grooves 26 of the edge section 14. Due to the angular inclination of the panels 16 from the section 14 the panels 16 may be secured by friction forces in the grooves 26. In one embodiment the angle was sensibly four degrees tabout 3.8 degrees).
Figure 2 shows one form of frame 30 by which the assembly 10 may be mounted, within the U-channel sides of the frame 30.
CA 022140S7 1997-08-2~
Fi,~u~e ~ eh~wE ~n ~ute~ ~ed ~ e~ ~nel 3~ ~f tr~n~lucent plastic, and an inner mask panel 34, generally of metal, having a desired sign such as "EXIT" cut, stencil-fashion, by way of message apertures through the mask.
The mask 34 and panel 32 are secured to the frame 30 by any suitable means.
A like arrangement of mask 34, and panel 32 may be secured to the rear face of frame 30, to provide a double-sided sign.
The mask 34 may be located outwardly of the panel 32. However, with the mask 34 located inwardly of panel 32, the imperforate portions of the mask 34 inner face may be made reflective, as by painting it silver or white, or by the application of a reflective surface, to increase the light intensity within the frame 30, to thereby increase the light output through the mask apertures.
In the case of a single sided sign, the rear face thereof may be a closure panel of a light-reflecting nature.
Referring to Figures 6 and 7, these show the cell shape of the interior surfaces of the light diffusion panels 16, in two commercial forms of available diffusion panelling.
In Figure 8 there is illustrated a portion 40 of a side lighted panel system having a single planar diffusion panel 42, located diagonally in its frame 4g. The panel 42 may comprise a composite diffusion panel, each half having the cellular, CA 022l40~7 l997-08-2~
light-receiving surface exposed to the respective adjoining strip of LED lamps 23. It will be understood that the frame 30 may be dispensed with, the extruded section 14 serving also as the frame for the system. Referring to Figure 9, the lighting unit arrangement 50 comprises a strip 52 of LED lamps, shown in mounted relation upon a printed circuit board, and inserted within the U-section base.
One side panel 54 of the unit 50 comprises a diffusion panel 42; the reverse side panel 56 of the unit SO has a reflecting surface 58, illustrated in this instance as being the outer face of the side panel 56. It will be understood that the inner face of side panel 56 may be made the reflecting face.
Referring to Figure lO, a two-mode LED circuit 60 is shown.
four LED lamp gangs 62 are shown, each gang 62 comprising four LED lamps 23 connected in series. The LED lamp gangs 62 are connected as two opposed, parallel-connected banks, with rectifier diodes 66 therebetween.
The illustrated 12-volt D.C. (battery) low-voltage supply is connected to the two bridge terminals by way of rectifier diodes 68 and resistors 70. A common negative ground 71 is provides. The high-voltage A.C. supply, shown as being a 120-volt household service is connected across the bridge, through a capacitor 72 and resistor 74.
Claims (20)
1. An edge-lighted panel having an illuminated face supported by a frame; a light source located adjacent at least a portion of said frame, and at least one diffusion panel having an arrangement of light diffusing cell elements over the inner, proximal surface thereof, said diffusion panel being interposed between said light source and said illuminated face and inclined at a slight angle from the face, in use to diffuse light from said source in illuminating relation with said proximal face.
2. The edge-lighted panel as set forth in Claim 1, said angle of inclination being in the range of about three to ten degrees.
3. The edge-lighted panel as set forth in Claim 1 or claim 2, said light source comprising light emitting diodes.
4. The edge-lighted panel as set forth in Claim 1, claim 2 or claim 3, said light diffusion panel having cell elements with concave incident faces.
5. The edge-lighted panel as set forth in Claim 1, claim 2 or claim 3 said light diffusion panel having cell elements with conical incident faces.
6. The edge-lighted panel as set forth in Claim 1, claim 2 or claim 3, said light diffusion panel having a substantially planar light emitting face.
7. The edge-lighted panel as set forth in Claim 1, claim 2 or claim 3, said panel having a plurality of said diffusion panels.
8. The edge-lighted panel as set forth in Claim 7, said panel having a plurality of said illuminated faces.
9. The edge-lighted panel as set forth in Claim 1, claim 2 or claim 3, said frame having said at least one diffusion panel secured thereto.
l0. The edge-lighted panel as set forth in Claim 9, said frame having a plurality of said diffusion panels secured thereto.
11. The edge-lighted panel as set forth in Claim 9, said frame having a slotted U-section of plastic.
12. The edge-lighted panel as set forth in Claim 9, said frame having said illuminated face secured thereto, at least a portion of said face being substantially translucent.
13. The edge-lighted panel as set forth in Claim 1, including a reflective face, to enhance the light output of said light emitting face.
14. An edge-lighted panel having a pair of mutually opposed illuminated faces; a peripheral frame; a light source located within said frame, and at least two diffusion panels, each having an arrangement of light diffusing cell elements over the inner, proximal surfaces thereof; each said diffusion panel being interposed between said light source and a respective said illuminated face and inclined at a slight angle from the face, said diffusion panels converging in joined relation, in use to diffuse light from said source in illuminating relation with said proximal face.
15. The edge-lighted panel as set forth in Claim 14, said angle of inclination being in the range of about 3 to 10 degrees.
16. The edge-lighted panel as set forth in Claim 14, said light source comprising light emitting diodes.
17. The edge-lighted panel as set forth in Claim 19, said light source comprising at least four gangs of light emitting diodes connected in mutually parallel relation, each said gang having a plurality of said diodes connected in mutual series relation, and wherein said light source is operable by a low-voltage D.C. supply or by a higher voltage A.C.supply.
18. The edge-lighted panel as set forth in Claim 14, one said light diffusion panel having cell elements with conical incident faces.
19. The edge-lighted panel as set forth in Claim 1, including an illumination face and an apertured mask, to receive light passing through a said diffusion panel.
20. The edge-lighted panel as set forth in Claim 14, including an illumination face and an apertured mask, to receive light passing through a said diffusion panel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/831,385 | 1997-04-01 | ||
| US08/831,385 US5838247A (en) | 1997-04-01 | 1997-04-01 | Solid state light system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2214057A1 true CA2214057A1 (en) | 1998-10-01 |
Family
ID=25258937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002214057A Abandoned CA2214057A1 (en) | 1997-04-01 | 1997-08-25 | Edge-lighted panel system |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5838247A (en) |
| CA (1) | CA2214057A1 (en) |
Families Citing this family (108)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6590502B1 (en) | 1992-10-12 | 2003-07-08 | 911Ep, Inc. | Led warning signal light and movable support |
| US7014336B1 (en) | 1999-11-18 | 2006-03-21 | Color Kinetics Incorporated | Systems and methods for generating and modulating illumination conditions |
| US6806659B1 (en) | 1997-08-26 | 2004-10-19 | Color Kinetics, Incorporated | Multicolored LED lighting method and apparatus |
| US6777891B2 (en) * | 1997-08-26 | 2004-08-17 | Color Kinetics, Incorporated | Methods and apparatus for controlling devices in a networked lighting system |
| US20030133292A1 (en) | 1999-11-18 | 2003-07-17 | Mueller George G. | Methods and apparatus for generating and modulating white light illumination conditions |
| US6183100B1 (en) * | 1997-10-17 | 2001-02-06 | Truck-Lite Co., Inc. | Light emitting diode 360° warning lamp |
| GB2330679B (en) | 1997-10-21 | 2002-04-24 | 911 Emergency Products Inc | Warning signal light |
| US6200134B1 (en) | 1998-01-20 | 2001-03-13 | Kerr Corporation | Apparatus and method for curing materials with radiation |
| US7740371B1 (en) | 1998-03-19 | 2010-06-22 | Charles A. Lemaire | Method and apparatus for pulsed L.E.D. illumination for a camera |
| US6095661A (en) * | 1998-03-19 | 2000-08-01 | Ppt Vision, Inc. | Method and apparatus for an L.E.D. flashlight |
| JP2960928B1 (en) * | 1998-07-24 | 1999-10-12 | スタンレー電気株式会社 | Signal lights for vehicles |
| US6191541B1 (en) | 1998-10-05 | 2001-02-20 | Godfrey Engineering, Inc. | Solid state tail light for aircraft |
| US6380865B1 (en) | 1999-04-06 | 2002-04-30 | 911 Emergency Products, Inc. | Replacement led lamp assembly and modulated power intensity for light source |
| US6614359B2 (en) | 1999-04-06 | 2003-09-02 | 911 Emergency Products, Inc. | Replacement led lamp assembly and modulated power intensity for light source |
| US6462669B1 (en) | 1999-04-06 | 2002-10-08 | E. P . Survivors Llc | Replaceable LED modules |
| US6700502B1 (en) | 1999-06-08 | 2004-03-02 | 911Ep, Inc. | Strip LED light assembly for motor vehicle |
| US6705745B1 (en) | 1999-06-08 | 2004-03-16 | 911Ep, Inc. | Rotational led reflector |
| US6788411B1 (en) | 1999-07-08 | 2004-09-07 | Ppt Vision, Inc. | Method and apparatus for adjusting illumination angle |
| US6283613B1 (en) | 1999-07-29 | 2001-09-04 | Cooper Technologies Company | LED traffic light with individual LED reflectors |
| US6367949B1 (en) | 1999-08-04 | 2002-04-09 | 911 Emergency Products, Inc. | Par 36 LED utility lamp |
| US6547410B1 (en) | 2000-07-28 | 2003-04-15 | 911 Emergency Products, Inc. | LED alley/take-down light |
| US6364506B1 (en) | 2000-02-03 | 2002-04-02 | Julian A. Mcdermott Corporation | Adjustable up-angle led lantern utilizing a minimal number of light emitting diodes |
| GB2359580B (en) * | 2000-02-26 | 2003-12-10 | Agd Systems Ltd | Traffic signal |
| WO2001095673A1 (en) | 2000-06-06 | 2001-12-13 | 911 Emergency Products, Inc. | Led compensation circuit |
| JP3686329B2 (en) * | 2000-08-22 | 2005-08-24 | シーシーエス株式会社 | Illumination device for surface inspection and surface inspection device |
| GB0020766D0 (en) * | 2000-08-24 | 2000-10-11 | Rozenberg Simon G | Improvements in lamps luminaires and lighting systems |
| US6464373B1 (en) * | 2000-11-03 | 2002-10-15 | Twr Lighting, Inc. | Light emitting diode lighting with frustoconical reflector |
| US7439847B2 (en) | 2002-08-23 | 2008-10-21 | John C. Pederson | Intelligent observation and identification database system |
| US8188878B2 (en) | 2000-11-15 | 2012-05-29 | Federal Law Enforcement Development Services, Inc. | LED light communication system |
| US7152996B2 (en) * | 2001-04-27 | 2006-12-26 | Altman Stage Lighting Co., Inc. | Diode lighting system |
| FR2826098B1 (en) * | 2001-06-14 | 2003-12-26 | Valeo Vision | LIGHTING OR SIGNALING DEVICE, PARTICULARLY FOR VEHICLE, COMPRISING SEVERAL LIGHT SOURCES |
| US6871993B2 (en) * | 2002-07-01 | 2005-03-29 | Accu-Sort Systems, Inc. | Integrating LED illumination system for machine vision systems |
| JP2004111357A (en) * | 2002-07-09 | 2004-04-08 | Topcon Corp | Light source device |
| US6663260B1 (en) | 2002-07-23 | 2003-12-16 | Dwayne A. Tieszen | Equipment work light ring |
| EP1411290A1 (en) * | 2002-10-18 | 2004-04-21 | Altman Stage Lighting Co.,Inc. New York Corporation | Diode lighting system |
| WO2004039057A2 (en) * | 2002-10-23 | 2004-05-06 | Digital Cinema Engines, Inc. | Method and apparatus for a projection system |
| ITFI20030099A1 (en) * | 2003-04-08 | 2004-10-09 | Elettromeccanica Cm S R L | LIGHT SIGNALING EQUIPMENT |
| US7091874B2 (en) * | 2003-04-18 | 2006-08-15 | Smithson Bradley D | Temperature compensated warning light |
| EP1955895B1 (en) * | 2003-05-28 | 2016-05-25 | Volkswagen Aktiengesellschaft | Lighting device for a vehicle with a LED-modul |
| CN100519269C (en) * | 2003-05-28 | 2009-07-29 | 大众汽车有限公司 | Illumination device for motor vehicles, comprising a lamp module provided with light-emitting diodes |
| US7521667B2 (en) | 2003-06-23 | 2009-04-21 | Advanced Optical Technologies, Llc | Intelligent solid state lighting |
| US6995355B2 (en) | 2003-06-23 | 2006-02-07 | Advanced Optical Technologies, Llc | Optical integrating chamber lighting using multiple color sources |
| US20070171649A1 (en) * | 2003-06-23 | 2007-07-26 | Advanced Optical Technologies, Llc | Signage using a diffusion chamber |
| US7145125B2 (en) * | 2003-06-23 | 2006-12-05 | Advanced Optical Technologies, Llc | Integrating chamber cone light using LED sources |
| SE0301992D0 (en) * | 2003-07-04 | 2003-07-04 | Fagerhults Belysning Ab | Lighting system comprising at least one ordinary lighting fixture and a lighting device for emergency or orientation lighting |
| US7178937B2 (en) * | 2004-01-23 | 2007-02-20 | Mcdermott Vernon | Lighting device and method for lighting |
| JP2005274836A (en) * | 2004-03-24 | 2005-10-06 | Fujinon Corp | Illuminating light source device |
| US7144131B2 (en) | 2004-09-29 | 2006-12-05 | Advanced Optical Technologies, Llc | Optical system using LED coupled with phosphor-doped reflective materials |
| US7506985B2 (en) * | 2005-10-26 | 2009-03-24 | Hewlett-Packard Development Company, L.P. | Projection light source having multiple light emitting diodes |
| TWI262276B (en) * | 2005-11-24 | 2006-09-21 | Ind Tech Res Inst | Illumination module |
| TWI294023B (en) * | 2006-03-17 | 2008-03-01 | Ind Tech Res Inst | Reflective illumination device |
| WO2008043025A2 (en) * | 2006-10-05 | 2008-04-10 | Lumination, Llc | Led backlighting system for cabinet sign |
| JP2010506348A (en) * | 2006-10-19 | 2010-02-25 | パナソニック株式会社 | LIGHT EMITTING DEVICE AND DISPLAY DEVICE AND LIGHTING DEVICE USING THE SAME |
| KR20080048112A (en) * | 2006-11-28 | 2008-06-02 | 삼성전자주식회사 | Light emitting diode, backlight unit and liquid crystal display having the same |
| US11265082B2 (en) | 2007-05-24 | 2022-03-01 | Federal Law Enforcement Development Services, Inc. | LED light control assembly and system |
| WO2008148022A2 (en) | 2007-05-24 | 2008-12-04 | Federal Law Enforcement Development Services, Inc. | Building illumination apparatus with integrated communications, security and energy management |
| US9414458B2 (en) | 2007-05-24 | 2016-08-09 | Federal Law Enforcement Development Services, Inc. | LED light control assembly and system |
| US9294198B2 (en) | 2007-05-24 | 2016-03-22 | Federal Law Enforcement Development Services, Inc. | Pulsed light communication key |
| US9100124B2 (en) | 2007-05-24 | 2015-08-04 | Federal Law Enforcement Development Services, Inc. | LED Light Fixture |
| US9258864B2 (en) | 2007-05-24 | 2016-02-09 | Federal Law Enforcement Development Services, Inc. | LED light control and management system |
| US9455783B2 (en) | 2013-05-06 | 2016-09-27 | Federal Law Enforcement Development Services, Inc. | Network security and variable pulse wave form with continuous communication |
| MX2010003077A (en) | 2007-09-21 | 2010-06-01 | Cooper Technologies Co | Light emitting diode recessed light fixture. |
| US7614769B2 (en) * | 2007-11-23 | 2009-11-10 | Sell Timothy L | LED conversion system for recessed lighting |
| TWI353053B (en) * | 2007-11-28 | 2011-11-21 | Ind Tech Res Inst | Lighting device |
| WO2009122453A1 (en) * | 2008-04-02 | 2009-10-08 | Wissen Lux S.P.A. | Led lighting apparatus |
| CN101614379B (en) * | 2008-06-25 | 2013-06-05 | 富准精密工业(深圳)有限公司 | Light-emitting diode lamp |
| JP5212720B2 (en) * | 2008-12-11 | 2013-06-19 | スタンレー電気株式会社 | Lamp |
| TWI401788B (en) * | 2008-12-24 | 2013-07-11 | Ind Tech Res Inst | Led packaging module and method |
| US8890773B1 (en) | 2009-04-01 | 2014-11-18 | Federal Law Enforcement Development Services, Inc. | Visible light transceiver glasses |
| US9066777B2 (en) | 2009-04-02 | 2015-06-30 | Kerr Corporation | Curing light device |
| US9072572B2 (en) | 2009-04-02 | 2015-07-07 | Kerr Corporation | Dental light device |
| US8337030B2 (en) * | 2009-05-13 | 2012-12-25 | Cree, Inc. | Solid state lighting devices having remote luminescent material-containing element, and lighting methods |
| DE102009042338B4 (en) * | 2009-09-21 | 2019-03-21 | Berchtold Holding Gmbh | surgical light |
| US9138593B2 (en) * | 2009-11-06 | 2015-09-22 | Universita' Degli Studi Di Firenze | Ingestible capsule for treating gastric infections, in particular for treating H. pylori infections |
| WO2011067987A1 (en) * | 2009-12-01 | 2011-06-09 | シャープ株式会社 | Light source package, illumination device, display device, and television receiving device |
| US8967840B1 (en) | 2009-12-02 | 2015-03-03 | Curtis J. Haney | Vehicle auxiliary lighting system |
| EP2339224B1 (en) * | 2009-12-22 | 2016-10-26 | Zumtobel Lighting GmbH | Assembly for emitting light |
| JP5421799B2 (en) * | 2010-01-18 | 2014-02-19 | パナソニック株式会社 | LED unit |
| TWI402452B (en) * | 2010-04-02 | 2013-07-21 | Hon Hai Prec Ind Co Ltd | Multicolored led lighting device |
| DE202010007032U1 (en) * | 2010-04-09 | 2011-08-09 | Tridonic Jennersdorf Gmbh | LED module for spotlights |
| US9648673B2 (en) | 2010-11-05 | 2017-05-09 | Cree, Inc. | Lighting device with spatially segregated primary and secondary emitters |
| WO2012097291A1 (en) | 2011-01-14 | 2012-07-19 | Federal Law Enforcement Development Services, Inc. | Method of providing lumens and tracking of lumen consumption |
| US9016896B1 (en) | 2011-02-23 | 2015-04-28 | Hughey & Phillips, Llc | Obstruction lighting system |
| US9010956B1 (en) | 2011-03-15 | 2015-04-21 | Cooper Technologies Company | LED module with on-board reflector-baffle-trim ring |
| EP2500631B1 (en) | 2011-03-17 | 2017-09-27 | Hughey & Phillips, LLC | Lighting system, e.g. all radial obstruction light for aircraft navigation |
| US9013331B2 (en) | 2011-03-17 | 2015-04-21 | Hughey & Phillips, Llc | Lighting and collision alerting system |
| TWI443278B (en) * | 2011-12-09 | 2014-07-01 | Wintek Corp | Led lighting fixture |
| US8974077B2 (en) | 2012-07-30 | 2015-03-10 | Ultravision Technologies, Llc | Heat sink for LED light source |
| DE102012109146A1 (en) * | 2012-09-27 | 2014-03-27 | Osram Opto Semiconductors Gmbh | Ring light module and method for producing a ring light module |
| DE102012109149A1 (en) * | 2012-09-27 | 2014-03-27 | Osram Opto Semiconductors Gmbh | Ring light module and method for producing a ring light module |
| US9265112B2 (en) | 2013-03-13 | 2016-02-16 | Federal Law Enforcement Development Services, Inc. | LED light control and management system |
| TWM461732U (en) * | 2013-04-10 | 2013-09-11 | Wintek Corp | Light source module |
| US20150198941A1 (en) | 2014-01-15 | 2015-07-16 | John C. Pederson | Cyber Life Electronic Networking and Commerce Operating Exchange |
| EP3172948B1 (en) * | 2014-07-24 | 2017-11-15 | Philips Lighting Holding B.V. | A light emitting module |
| EP3193074B1 (en) * | 2014-09-09 | 2020-03-11 | Shenzhen Keweitian Eco-Lighting Co., Ltd. | Solar spectrum-like led structure |
| EP3001780A1 (en) | 2014-09-23 | 2016-03-30 | Osram Sylvania Inc. | Formable light source and method of making |
| US9528667B1 (en) | 2015-09-03 | 2016-12-27 | Osram Sylvania Inc. | Thermoforming a substrate bearing LEDs into a curved bulb enclosure |
| US10106276B2 (en) | 2015-04-16 | 2018-10-23 | Hughey & Phillips, Llc | Obstruction lighting system configured to emit visible and infrared light |
| FR3036168B1 (en) * | 2015-05-11 | 2017-06-09 | Peugeot Citroen Automobiles Sa | LIGHT SIGNALING DEVICE |
| US20170048953A1 (en) | 2015-08-11 | 2017-02-16 | Federal Law Enforcement Development Services, Inc. | Programmable switch and system |
| US11178741B1 (en) | 2015-12-22 | 2021-11-16 | Hughey & Phillips, Llc | Lighting system configured to emit visible and infrared light |
| WO2018053772A1 (en) * | 2016-09-23 | 2018-03-29 | 深圳市客为天生态照明有限公司 | Led lamp bead structure having quasi-solar spectrum |
| WO2018053773A1 (en) * | 2016-09-23 | 2018-03-29 | 深圳市客为天生态照明有限公司 | Sun-like spectrum led lamp bead structure |
| CN208780976U (en) | 2018-09-25 | 2019-04-23 | 中强光电股份有限公司 | Light supply apparatus and projection device |
| CN111487841B (en) | 2019-01-29 | 2021-11-16 | 中强光电股份有限公司 | Light source device and projection equipment |
| CN110969881B (en) * | 2019-12-10 | 2021-01-22 | 中冶京诚工程技术有限公司 | Traffic light and method and device for controlling arrangement of light beads on traffic light |
| US11719925B2 (en) | 2020-04-21 | 2023-08-08 | Designs For Vision, Inc. | User wearable fluorescence enabled visualization system |
| EP4075055A1 (en) * | 2021-04-17 | 2022-10-19 | Designs for Vision, Inc. | Multiple light source configuration |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556687A (en) * | 1978-06-29 | 1980-01-18 | Handotai Kenkyu Shinkokai | Traffic use display |
| US5184114A (en) * | 1982-11-04 | 1993-02-02 | Integrated Systems Engineering, Inc. | Solid state color display system and light emitting diode pixels therefor |
| US5136287A (en) * | 1988-09-02 | 1992-08-04 | Arnold Borenstein | Traffic-related message signal using light-emitting diodes |
| US5036248A (en) * | 1989-03-31 | 1991-07-30 | Ledstar Inc. | Light emitting diode clusters for display signs |
| US5457450A (en) * | 1993-04-29 | 1995-10-10 | R & M Deese Inc. | LED traffic signal light with automatic low-line voltage compensating circuit |
| US5528474A (en) * | 1994-07-18 | 1996-06-18 | Grote Industries, Inc. | Led array vehicle lamp |
| US5633629A (en) * | 1995-02-08 | 1997-05-27 | Hochstein; Peter A. | Traffic information system using light emitting diodes |
-
1997
- 1997-04-01 US US08/831,385 patent/US5838247A/en not_active Expired - Fee Related
- 1997-08-25 CA CA002214057A patent/CA2214057A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US5838247A (en) | 1998-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2214057A1 (en) | Edge-lighted panel system | |
| JP3074482B2 (en) | Backlight indicator | |
| CA2337613C (en) | Structure for achieving a linear light source geometry | |
| EP1071906B1 (en) | Linear illumination sources and systems | |
| US6582103B1 (en) | Lighting apparatus | |
| JP2538667B2 (en) | Backlight | |
| TW594264B (en) | A light-projecting device for a backlight module in a flat panel display device | |
| US20100232159A1 (en) | Illumination device with selectable light distribution curves | |
| EP1200772A1 (en) | Lighting apparatus | |
| US4554544A (en) | Diffuse incandescent runway marker light apparatus for overt/covert operation | |
| US20080158879A1 (en) | Modulated lighting device | |
| US11193660B2 (en) | Optical element, a lighting apparatus and a lighting lamp with the lighting apparatus | |
| NZ505873A (en) | Lighting fixture where the illumination source is applied to the upper boundary surfaces of the profiled bodies | |
| JP3122411B2 (en) | Edge light panel light source device | |
| US20060077689A1 (en) | Backlight module with light guide plate having concave light input surface | |
| JPS59155829A (en) | Transmission type liquid crystal display device | |
| JP2001023423A (en) | Flat light source unit | |
| US20060080874A1 (en) | Dynamic message sign | |
| US6429581B1 (en) | TIR lens for uniform brightness | |
| US20040070965A1 (en) | Removable light guide system for advertising display | |
| US20060274553A1 (en) | Lamp having a planar light-emitting source | |
| US20070014109A1 (en) | Sign unit with colorful effect | |
| CN211780281U (en) | LED dodging lamp | |
| JP2012074362A (en) | Reflective type led lighting system and related direct type led lighting system | |
| CA2479631A1 (en) | Cold-cathode fluorescent lamp assembly for lighting applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |