WO1999039361A1 - A fed crt having various control and focusing electrodes along with horizontal and vertical deflectors - Google Patents
A fed crt having various control and focusing electrodes along with horizontal and vertical deflectors Download PDFInfo
- Publication number
- WO1999039361A1 WO1999039361A1 PCT/US1999/001841 US9901841W WO9939361A1 WO 1999039361 A1 WO1999039361 A1 WO 1999039361A1 US 9901841 W US9901841 W US 9901841W WO 9939361 A1 WO9939361 A1 WO 9939361A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cathode
- recited
- electron beam
- display
- operable
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/46—Control electrodes, e.g. grid; Auxiliary electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/467—Control electrodes for flat display tubes, e.g. of the type covered by group H01J31/123
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/04—Cathodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
- H01J3/02—Electron guns
- H01J3/021—Electron guns using a field emission, photo emission, or secondary emission electron source
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
- H01J3/02—Electron guns
- H01J3/021—Electron guns using a field emission, photo emission, or secondary emission electron source
- H01J3/022—Electron guns using a field emission, photo emission, or secondary emission electron source with microengineered cathode, e.g. Spindt-type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2329/00—Electron emission display panels, e.g. field emission display panels
Definitions
- the present invention relates in general to displays, and in particular, to field emission displays.
- LCD active matrix liquid crystal display
- FED field emission display
- CRT field emission display
- a field emission display is an emissive display similar to a CRT in many ways. The major difference is the type and number of electron emitters.
- the electron guns in a CRT produce electrons by thermionic emission from a cathode (see FIGURE 1).
- CRTs have one or several electron guns depending on the configuration of the electron scanning system.
- the extracted electrons are focused by the electron gun and while the electrons are accelerated towards the viewing screen, electromagnetic deflection coils are used to scan the electron beam across the phosphor coated faceplate. This requires a large distance between the deflection coils and faceplate.
- the larger the CRT viewing area the greater the depth required to scan the beam.
- FIGURE 2 illustrates a typical FED having a plurality of electron emitters or cathodes 202 associated with each pixel on the viewing screen 201. This eliminates the need for the electromagnetic deflection coils for steering the individual electron beams. As a result, an FED is much thinner than a CRT. Furthermore, because of the placement of the emitters in an addressable matrix, an FED does not suffer from traditional non-linearity and pin cushion effects associated with a CRT. Nevertheless, FEDs also suffer from disadvantages inherent in the matrix addressable design used to implement the FED design. FEDs require many electron emitting cathodes which are matrix addressed and must all be very uniform and of a very high density in location.
- the present invention addresses some of the problems associated with matrix addressable FEDs by reducing the number of cathodes, or field emitters, through the use of beam forming and deflection techniques as similarly used in CRTs. Because fewer cathodes are required, the cathode structure will be easier to fabricate. With the use of beam forming and deflection, a high number of cathodes is not required. Furthermore, beam forming and deflection techniques alleviate the requirement that the field emission from the cathode structure be of a high density. Moreover, within any one particular cathode, as field emission sites decay, the display will remain operable since other field emission sites within the particular cathode will continue to provide the requisite electron beam.
- a plurality of cathodes will comprise a cathode structure.
- an electron beam focusing and deflection structure will focus electrons emitted from each cathode and provide a deflection function similar to that utilized within a CRT.
- a particular cathode will be able to scan a plurality of pixels on the display screen. Software will be utilized to eliminate the overlapping of the beams so that the images produced by each of the cathodes combine to form the overall image on the display.
- field emission cathode Any type of field emission cathode may be utilized, including thin films, Spindt devices, flat cathodes, edge emitters, surface conduction electron emitters, etc.
- FIGURE 1 illustrates a prior art CRT
- FIGURE 2 illustrates a prior art FED
- FIGURE 3 illustrates a concept of using FEDs with beam deflection
- FIGURE 4 illustrates a side view of a display configured in accordance with the present invention
- FIGURE 5 illustrates a front view of a display configured in accordance with the present invention
- FIGURE 6 illustrates a sectional view of one cathode in the display of the present invention
- FIGURE 7 illustrates a detailed block diagram of a display adapter in accordance with the present invention
- FIGURE 8 illustrates a data processing system configured in accordance with the present invention
- FIGURE 9 illustrates a side view of one embodiment of the present invention
- FIGURE 10 illustrates an exploded view of the embodiment illustrated in FIGURE 9.
- the present invention combines the technology and advantages associated therewith of FEDs with beam generation and deflection of CRT technology. Though the present invention does not utilize a separate cathode for generating an image on each and every pixel within the
- FIGURE 3 where a plurality of cathodes 305 each generate a beam of electrons 302, which are deflected by an electron beam deflecting, or focusing, apparatus 303.
- a plurality of pixels on display screen 301 can be illuminated by one electron beam 302.
- the area of pixels on display screen 301 that could be covered with one electron beam 302 is represented by the cone labeled 304.
- FED technology is utilized to generate the electron beams because of the various advantages discussed above.
- the use of FEDs has many advantages over the use of thermionic field emission from a heated cathode.
- thermionic emission has been disclosed in U.S. Patent No. 5,436,530.
- heated cathodes represent a power loss in the system when compared with the use of field emission.
- the filaments used to heat the cathodes are delicate in nature (fine wires must be used in order to minimize the power required), which are prone to vibration and sagging. Vibration and sagging are typically solved by adding springs and by carefully controlling the detailed shape of the filaments. However, this entails further manufacturing steps and costs and results in a less reliable device.
- thermal effects resulting from the proximity of the hot filament will cause expansion of various parts of the structure, which will result in changes in the electrical characteristics of the display.
- use of a cold cathode permits the structure to be partially or wholly manufactured as an integrated device.
- FIGURE 4 illustrates display 400 where images are generated on display screen 401 by beam generation and deflection from an FED source 402.
- the deflection, or focusing, of the various electron beams is performed by beam deflection apparatus 403.
- the plurality of cones 404 represent the areas on display screen 401 illuminated by each of the generated electron beams.
- the electron beams generate images by exciting phosphors on display screen 401.
- the displayed images may be monochrome or in color.
- FIGURE 5 illustrates a front view of display screen 401.
- Each area of display screen 401 labeled as 501 represents an image generated by one cathode and its associated electron deflection apparatus.
- Special software will be utilized to eliminate overlapping of the beams between areas 501 so that the boundaries represented with dashed lines are invisible to the viewer. Such software is not discussed in detail in this application, since it is not important to an understanding of present invention.
- FIGURE 6 illustrates a cross-sectional view of one cathode 402 and its associated electron focusing and deflection apparatus within display device 400.
- a cathode 601 is produced on substrate 607 .
- Such a cathode 601 may comprise micro-tips, edge emission cathodes, negative electron affinity cathodes, diamond and diamond-like carbon films, or surface conduction electron emitters.
- Extraction grid 602 operates to extract electrons from cathode 601 as a result of the difference in potential between extraction grid 602 and cathode 601.
- Control grid 603 operates to modulate the electron beam current, which will, in turn, modulate the light output.
- the electronic optics used to focus the electron beam is shown as 604; however, this may be comprised of a plurality of grids having various potentials applied thereto. Such a plurality of grids is further detailed in FIGURES 9 and 10.
- Horizontal deflecting grid 605 and vertical deflecting grid 606 operate in a similar manner as electromagnetic deflection coils in a CRT to scan the electron beam onto the individual pixels on display screen 401.
- FIGURES 9 and 10 illustrate one cathode assembly 900 operable for generating a plurality of electron beams 910 for scanning a plurality of viewing areas 501 on a display screen 401. Shown are electron beams 910 generated on cathode 601. These electron beams are shown with dashed lines. Note that another four electron beams are generated from cathode 601 , but these electron beams are not illustrated with dashed lines for reasons of clarity. Furthermore, FIGURES 9 and 10 do not illustrate the spacer elements used to separate the various electrodes and deflectors from each other and from cathode 601. Such spacer elements may be comprised of insulative materials.
- Pressure plate 1004 is coupled to substrate carrier 902. Pressure plate is used to provide a medium by which all of the various elements of cathode structure 900 may be connected together, such as through the use of pressure clips.
- Cathode substrate 901 is positioned on substrate carrier 902 and held in place by clips 905.
- Spacers 1005 are utilized to provide spacing between several of the various electrodes and deflectors. Further description of pressure plate 1004 and spacers 1005 is not necessary for an understanding of the present invention.
- Connection wires 904 provide electric potential to cathode 601 from connecting leads 903, which pass through insulators 906 to the underside of cathode structure 900.
- Electron emitting sites are generated on cathode 601 to generate electrons, which are then controlled and focused through the various electrodes, anodes, and deflectors further described below. Note that certain techniques may be utilized to localize the emission sites on specific portions of cathode 601.
- extraction grid 602 assists in extracting electrons from cathode 601, which are passed through holes formed in extraction grid 602.
- Control grids 603 further assist in the controlling of the electron beams.
- the electron focusing apparatus may be comprised of first and second anodes 1003 and
- FIGURES 6, 9 and 10 may be implemented as a monolithic structure using typical deposition, etching, etc. microelectronics manufacturing techniques.
- Workstation 800 includes central processing unit (CPU) 810, such as a conventional microprocessor, and a number of other units interconnected via system bus 812.
- CPU central processing unit
- Workstation 813 includes random access memory (RAM) 814, read only memory (ROM) 816, and input/output (I/O) adapter 818 for connecting peripheral devices such as disk units 820 and tape drives 840 to bus 812, user interface adapter 822 for connecting keyboard 824, mouse 826, speaker 828, microphone 832, and/or other user interface devices such as a touch screen device (not shown) to bus 812, communication adapter 834 for connecting workstation 813 to a data processing network, and display adapter 700 for connecting bus 812 to display device 400.
- CPU 810 may include other circuitry not shown herein, which will include circuitry commonly found within a microprocessor, e.g., execution unit, bus interface unit, arithmetic logic unit, etc. CPU 810 may also reside on a single integrated circuit.
- Microcontroller 701 will utilize a state machine, hardware, and/or software to operate the plurality of cathodes 400 in order to produce images on display areas 501 on display 400.
- a portion of electronics 702 will be utilized for biasing the focus electrodes 604.
- Horizontal and vertical deflection electrodes 606 and 605 will be controlled by blocks 703 and 704, respectively.
- Cathode driver 705 will operate the various cathodes 601 , while control of control grids 603 will be performed by control grid driver 706.
- Controller 701 will operate to generate the various images on areas 501 in a manner so that there is no apparent boundary between areas 501 , and so that areas 501 operate to generate, either a plurality of separate images 501 , or a composite image on the entire display 401. Note that any combination of composite images may be displayed on display screen 401 as a function of display areas 501.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69934100T DE69934100T2 (en) | 1998-01-30 | 1999-01-29 | FIELD EMISSION CATHODE STREAM TUBES WITH CONTROL AND FOCUSING ELECTRODES AND HORIZONTAL AND VERTICAL DEFLECTIONS |
JP2000529733A JP2002502092A (en) | 1998-01-30 | 1999-01-29 | FEDCRT with various control and focusing electrodes with horizontal and vertical deflectors |
CA002319395A CA2319395C (en) | 1998-01-30 | 1999-01-29 | A fed crt having various control and focusing electrodes along with horizontal and vertical deflectors |
EP99903470A EP1057198B1 (en) | 1998-01-30 | 1999-01-29 | A fed crt having various control and focusing electrodes along with horizontal and vertical deflectors |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/016,222 | 1998-01-30 | ||
US09/016,222 US6441543B1 (en) | 1998-01-30 | 1998-01-30 | Flat CRT display that includes a focus electrode as well as multiple anode and deflector electrodes |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999039361A1 true WO1999039361A1 (en) | 1999-08-05 |
Family
ID=21776004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/001841 WO1999039361A1 (en) | 1998-01-30 | 1999-01-29 | A fed crt having various control and focusing electrodes along with horizontal and vertical deflectors |
Country Status (9)
Country | Link |
---|---|
US (4) | US6441543B1 (en) |
EP (1) | EP1057198B1 (en) |
JP (1) | JP2002502092A (en) |
KR (1) | KR100646893B1 (en) |
CN (2) | CN1196157C (en) |
AT (1) | ATE346373T1 (en) |
CA (1) | CA2319395C (en) |
DE (1) | DE69934100T2 (en) |
WO (1) | WO1999039361A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001050491A1 (en) * | 1999-12-31 | 2001-07-12 | Extreme Devices Incorporated | Segmented gate drive for dynamic beam shape correction in field emission cathodes |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002093350A (en) * | 2000-09-18 | 2002-03-29 | Futaba Corp | Display tube using filament |
KR20030073365A (en) * | 2002-03-11 | 2003-09-19 | 엘지.필립스디스플레이(주) | The Flat display device |
US7012266B2 (en) | 2002-08-23 | 2006-03-14 | Samsung Electronics Co., Ltd. | MEMS-based two-dimensional e-beam nano lithography device and method for making the same |
AU2003302019A1 (en) | 2002-08-23 | 2004-06-15 | The Regents Of The University Of California | Improved microscale vacuum tube device and method for making same |
US6809465B2 (en) * | 2002-08-23 | 2004-10-26 | Samsung Electronics Co., Ltd. | Article comprising MEMS-based two-dimensional e-beam sources and method for making the same |
AU2003304297A1 (en) * | 2002-08-23 | 2005-01-21 | Sungho Jin | Article comprising gated field emission structures with centralized nanowires and method for making the same |
US20060163994A1 (en) * | 2002-09-10 | 2006-07-27 | Damen Daniel M | Vacuum display device with increased resolution |
US20040207309A1 (en) * | 2003-04-21 | 2004-10-21 | Lesenco Dumitru Nicolae | Flat color display device and method of manufacturing |
US20040245224A1 (en) * | 2003-05-09 | 2004-12-09 | Nano-Proprietary, Inc. | Nanospot welder and method |
KR20060018249A (en) * | 2003-06-12 | 2006-02-28 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Electrostatic deflection system and display device |
KR100548256B1 (en) * | 2003-11-05 | 2006-02-02 | 엘지전자 주식회사 | Carbon nanotube field emission device and driving method thereof |
KR100926748B1 (en) * | 2004-08-11 | 2009-11-16 | 전자빔기술센터 주식회사 | Multi sf edi |
US20080012461A1 (en) * | 2004-11-09 | 2008-01-17 | Nano-Proprietary, Inc. | Carbon nanotube cold cathode |
KR100810541B1 (en) | 2006-03-28 | 2008-03-18 | 한국전기연구원 | Cold cathode electron gun using an electron amplification by secondary electron emission, and e-beam generation method thereof |
WO2008069223A1 (en) * | 2006-12-05 | 2008-06-12 | Semiconductor Energy Laboratory Co., Ltd. | Anti-reflection film and display device |
WO2008069221A1 (en) * | 2006-12-05 | 2008-06-12 | Semiconductor Energy Laboratory Co., Ltd. | Plasma display panel and field emission display |
WO2008069162A1 (en) * | 2006-12-05 | 2008-06-12 | Semiconductor Energy Laboratory Co., Ltd. | Anti-reflection film and display device |
WO2008069222A1 (en) * | 2006-12-05 | 2008-06-12 | Semiconductor Energy Laboratory Co., Ltd. | Plasma display panel and field emission display |
WO2008069163A1 (en) | 2006-12-05 | 2008-06-12 | Semiconductor Energy Laboratory Co., Ltd. | Plasma display panel and field emission display |
WO2008069219A1 (en) * | 2006-12-05 | 2008-06-12 | Semiconductor Energy Laboratory Co., Ltd. | Antireflective film and display device |
US10133181B2 (en) * | 2015-08-14 | 2018-11-20 | Kla-Tencor Corporation | Electron source |
KR102607332B1 (en) * | 2020-03-24 | 2023-11-29 | 한국전자통신연구원 | Field emission device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5191217A (en) * | 1991-11-25 | 1993-03-02 | Motorola, Inc. | Method and apparatus for field emission device electrostatic electron beam focussing |
US5666019A (en) * | 1995-09-06 | 1997-09-09 | Advanced Vision Technologies, Inc. | High-frequency field-emission device |
US5763987A (en) * | 1995-05-30 | 1998-06-09 | Mitsubishi Denki Kabushiki Kaisha | Field emission type electron source and method of making same |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4958104A (en) * | 1986-08-20 | 1990-09-18 | Canon Kabushiki Kaisha | Display device having first and second cold cathodes |
JP2622842B2 (en) * | 1987-10-12 | 1997-06-25 | キヤノン株式会社 | Electron beam image display device and deflection method for electron beam image display device |
DE3852276T2 (en) * | 1987-11-16 | 1996-01-04 | Matsushita Electric Ind Co Ltd | Image display device. |
US5160871A (en) | 1989-06-19 | 1992-11-03 | Matsushita Electric Industrial Co., Ltd. | Flat configuration image display apparatus and manufacturing method thereof |
US5231606A (en) * | 1990-07-02 | 1993-07-27 | The United States Of America As Represented By The Secretary Of The Navy | Field emitter array memory device |
US5103145A (en) | 1990-09-05 | 1992-04-07 | Raytheon Company | Luminance control for cathode-ray tube having field emission cathode |
JP3060655B2 (en) | 1991-10-28 | 2000-07-10 | 三菱電機株式会社 | Flat panel display |
EP0614209A1 (en) | 1993-03-01 | 1994-09-07 | Hewlett-Packard Company | A flat panel display |
US5597338A (en) * | 1993-03-01 | 1997-01-28 | Canon Kabushiki Kaisha | Method for manufacturing surface-conductive electron beam source device |
WO1994020975A1 (en) * | 1993-03-11 | 1994-09-15 | Fed Corporation | Emitter tip structure and field emission device comprising same, and method of making same |
US5473218A (en) * | 1994-05-31 | 1995-12-05 | Motorola, Inc. | Diamond cold cathode using patterned metal for electron emission control |
DE19534228A1 (en) | 1995-09-15 | 1997-03-20 | Licentia Gmbh | Cathode ray tube with field emission cathode |
JP2871579B2 (en) * | 1996-03-28 | 1999-03-17 | 日本電気株式会社 | Light emitting device and cold cathode used therefor |
US5710483A (en) | 1996-04-08 | 1998-01-20 | Industrial Technology Research Institute | Field emission device with micromesh collimator |
JP3086193B2 (en) | 1996-07-08 | 2000-09-11 | 三星エスディアイ株式会社 | Cathode structure, electron gun for cathode ray tube using the same, and color cathode ray tube |
JP2891196B2 (en) * | 1996-08-30 | 1999-05-17 | 日本電気株式会社 | Cold cathode electron gun and electron beam device using the same |
FR2756417A1 (en) | 1996-11-22 | 1998-05-29 | Pixtech Sa | FLAT VISUALIZATION SCREEN WITH FOCUSING GRIDS |
US6208072B1 (en) | 1997-08-28 | 2001-03-27 | Matsushita Electronics Corporation | Image display apparatus with focusing and deflecting electrodes |
-
1998
- 1998-01-30 US US09/016,222 patent/US6441543B1/en not_active Expired - Fee Related
-
1999
- 1999-01-29 KR KR1020007008295A patent/KR100646893B1/en not_active IP Right Cessation
- 1999-01-29 WO PCT/US1999/001841 patent/WO1999039361A1/en active IP Right Grant
- 1999-01-29 CA CA002319395A patent/CA2319395C/en not_active Expired - Fee Related
- 1999-01-29 JP JP2000529733A patent/JP2002502092A/en active Pending
- 1999-01-29 CN CNB99802404XA patent/CN1196157C/en not_active Expired - Lifetime
- 1999-01-29 DE DE69934100T patent/DE69934100T2/en not_active Expired - Lifetime
- 1999-01-29 CN CNA2004100322872A patent/CN1591760A/en active Pending
- 1999-01-29 EP EP99903470A patent/EP1057198B1/en not_active Expired - Lifetime
- 1999-01-29 AT AT99903470T patent/ATE346373T1/en not_active IP Right Cessation
-
2000
- 2000-02-22 US US09/510,941 patent/US6411020B1/en not_active Expired - Fee Related
-
2002
- 2002-01-10 US US10/043,479 patent/US6635986B2/en not_active Expired - Fee Related
-
2003
- 2003-02-21 US US10/371,240 patent/US6958576B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5191217A (en) * | 1991-11-25 | 1993-03-02 | Motorola, Inc. | Method and apparatus for field emission device electrostatic electron beam focussing |
US5763987A (en) * | 1995-05-30 | 1998-06-09 | Mitsubishi Denki Kabushiki Kaisha | Field emission type electron source and method of making same |
US5666019A (en) * | 1995-09-06 | 1997-09-09 | Advanced Vision Technologies, Inc. | High-frequency field-emission device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001050491A1 (en) * | 1999-12-31 | 2001-07-12 | Extreme Devices Incorporated | Segmented gate drive for dynamic beam shape correction in field emission cathodes |
US6429596B1 (en) | 1999-12-31 | 2002-08-06 | Extreme Devices, Inc. | Segmented gate drive for dynamic beam shape correction in field emission cathodes |
Also Published As
Publication number | Publication date |
---|---|
CN1295717A (en) | 2001-05-16 |
EP1057198A4 (en) | 2002-01-30 |
CA2319395A1 (en) | 1999-08-05 |
US6958576B2 (en) | 2005-10-25 |
CN1591760A (en) | 2005-03-09 |
EP1057198A1 (en) | 2000-12-06 |
DE69934100T2 (en) | 2007-06-28 |
US6441543B1 (en) | 2002-08-27 |
DE69934100D1 (en) | 2007-01-04 |
CN1196157C (en) | 2005-04-06 |
KR20010034472A (en) | 2001-04-25 |
EP1057198B1 (en) | 2006-11-22 |
ATE346373T1 (en) | 2006-12-15 |
US20040017140A1 (en) | 2004-01-29 |
KR100646893B1 (en) | 2006-11-17 |
JP2002502092A (en) | 2002-01-22 |
US6411020B1 (en) | 2002-06-25 |
US20020060517A1 (en) | 2002-05-23 |
CA2319395C (en) | 2007-10-09 |
US6635986B2 (en) | 2003-10-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6411020B1 (en) | Flat CRT display | |
US5300862A (en) | Row activating method for fed cathodoluminescent display assembly | |
US6940231B2 (en) | Apparatuses for providing uniform electron beams from field emission displays | |
US5015912A (en) | Matrix-addressed flat panel display | |
US5347292A (en) | Super high resolution cold cathode fluorescent display | |
JP2809129B2 (en) | Field emission cold cathode and display device using the same | |
US5543691A (en) | Field emission display with focus grid and method of operating same | |
WO1988001098A1 (en) | Matrix-addressed flat panel display | |
JPH0721903A (en) | Electron gun structure for cathode-ray tube using field emission type cathode | |
JP2003263951A (en) | Field emission type electron source and driving method | |
EP0854493B1 (en) | Cathode for display device | |
JPH10125215A (en) | Field emission thin film cold cathode, and display device using it | |
WO1985005491A1 (en) | Flat panel display utilizing linear array of field emission cathodes | |
US6225761B1 (en) | Field emission display having an offset phosphor and method for the operation thereof | |
US6177759B1 (en) | Spacer, support, grid and anode design for a display device compensating for localized variations in the emission of electrons | |
JPH09204880A (en) | Electron gun and cathode ray tube using the same | |
JP2778448B2 (en) | Driving method of electron gun and cathode ray tube | |
KR100703257B1 (en) | Display apparatus | |
Seats et al. | 36.1: Invited Paper: The Evolution of Flat Panel Cathode Ray Tubes | |
JPH03190042A (en) | Cathode-ray image display device | |
JPH06259029A (en) | Method for driving electron beam generating device and method for driving image forming device and electron beam generating device and image forming device driven by relevant driving methods | |
JPH03210741A (en) | Flat type cathode-ray tube display |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 99802404.X Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA CN JP KR |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
ENP | Entry into the national phase |
Ref document number: 2319395 Country of ref document: CA Ref document number: 2319395 Country of ref document: CA Kind code of ref document: A Ref document number: 2000 529733 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020007008295 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1999903470 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1999903470 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1020007008295 Country of ref document: KR |
|
WWG | Wipo information: grant in national office |
Ref document number: 1020007008295 Country of ref document: KR |
|
WWG | Wipo information: grant in national office |
Ref document number: 1999903470 Country of ref document: EP |