CA2050393A1 - Dual cavity lcd - Google Patents

Dual cavity lcd

Info

Publication number
CA2050393A1
CA2050393A1 CA2050393A CA2050393A CA2050393A1 CA 2050393 A1 CA2050393 A1 CA 2050393A1 CA 2050393 A CA2050393 A CA 2050393A CA 2050393 A CA2050393 A CA 2050393A CA 2050393 A1 CA2050393 A1 CA 2050393A1
Authority
CA
Canada
Prior art keywords
lcd
liquid crystal
areas
dual cavity
active
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.)
Granted
Application number
CA2050393A
Other languages
French (fr)
Other versions
CA2050393C (en
Inventor
Frank D. Pavone
Alan G. Bruce
Charles L. Guthrie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northrop Grumman Guidance and Electronics Co Inc
Original Assignee
Frank D. Pavone
Alan G. Bruce
Charles L. Guthrie
Litton Systems, Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Frank D. Pavone, Alan G. Bruce, Charles L. Guthrie, Litton Systems, Inc. filed Critical Frank D. Pavone
Publication of CA2050393A1 publication Critical patent/CA2050393A1/en
Application granted granted Critical
Publication of CA2050393C publication Critical patent/CA2050393C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D7/00—Indicating measured values
    • B60K35/215—
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133374—Constructional arrangements; Manufacturing methods for displaying permanent signs or marks

Abstract

An LCD has both active and passive display areas. The active areas are presented by selective energization of dichroic liquid crystal, and the passive areas are created by a mask. The LCD cell includes a sealed cavity containing the dichroic liquid crystal which has an area substantially less than the total display area. The remaining portion of the LCD
cell is free of liquid crystal and is transparent to the passage of light from a rear light source.
CA002050393A 1990-09-10 1991-08-30 Dual cavity lcd Expired - Fee Related CA2050393C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/579,616 US5130827A (en) 1990-09-10 1990-09-10 Display cell having active and passive areas
US579,616 1990-09-10

Publications (2)

Publication Number Publication Date
CA2050393A1 true CA2050393A1 (en) 1992-03-11
CA2050393C CA2050393C (en) 1994-05-31

Family

ID=24317630

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002050393A Expired - Fee Related CA2050393C (en) 1990-09-10 1991-08-30 Dual cavity lcd

Country Status (4)

Country Link
US (1) US5130827A (en)
EP (1) EP0475281A3 (en)
CA (1) CA2050393C (en)
IL (1) IL99319A (en)

Families Citing this family (20)

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US5580950A (en) * 1993-04-21 1996-12-03 The University Of Akron Negative birefringent rigid rod polymer films
DE69424937T2 (en) * 1993-04-21 2001-01-11 Univ Akron Akron POLYAMIDE FILM WITH NEGATIVE DOUBLE BREAKAGE
US5870156A (en) * 1996-09-05 1999-02-09 Northern Telecom Limited Shadow mask for backlit LCD
US6473220B1 (en) 1998-01-22 2002-10-29 Trivium Technologies, Inc. Film having transmissive and reflective properties
DE19834259A1 (en) * 1998-07-30 2000-02-03 Meyer Bernd Display device with a flat screen for showing data and information has a grid of display elements to be activated by electronic driving impulses
AU5644299A (en) * 1999-09-27 2001-04-30 Q-Tag Ag Monitoring device for monitoring and displaying critical storage or transport conditions
US7595934B2 (en) 2002-03-26 2009-09-29 Brilliant Film Llc Integrated sub-assembly having a light collimating or transflecting device
US7345824B2 (en) * 2002-03-26 2008-03-18 Trivium Technologies, Inc. Light collimating device
JP2004074871A (en) * 2002-08-13 2004-03-11 Kawasaki Heavy Ind Ltd Indicator for vehicle
US7573550B2 (en) * 2003-05-20 2009-08-11 Brilliant Film, Llc Devices for use in non-emissive displays
US7347575B2 (en) 2004-07-13 2008-03-25 Yazaki North America, Inc. Vehicle gauge with embedded driver information
US7427143B1 (en) 2005-06-30 2008-09-23 Yazaki North America, Inc. Instrument cluster with three-dimensional display
US7750821B1 (en) 2007-03-30 2010-07-06 Yazaki North America, Inc. System and method for instrument panel with color graphical display
US7571696B1 (en) 2007-06-19 2009-08-11 Yazaki North America, Inc. System and method for analog vehicle gauge with embedded driver information
WO2009108896A1 (en) * 2008-02-27 2009-09-03 Brilliant Film, Llc Concentrators for solar power generating systems
DE102009049632A1 (en) * 2009-03-20 2010-09-23 Johnson Controls Automotive Electronics Gmbh Gauge
JP5999411B2 (en) * 2012-04-06 2016-09-28 日本精機株式会社 Luminescent display device
USD720638S1 (en) 2012-09-13 2015-01-06 Time Timer Llc Watch face
DE102016104367B4 (en) * 2015-03-20 2018-05-09 Visteon Global Technologies, Inc. DISPLAY SYSTEM FOR DISPLAYING A VARIETY OF OPERATING PARAMETERS OF A VEHICLE
USD830858S1 (en) * 2017-01-23 2018-10-16 Time Timer Llc Timer

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1472260A (en) * 1973-10-29 1977-05-04 Murrell N Electro optical display system in a time-piece
CH1283674A4 (en) * 1974-09-23 1977-02-28
US4385842A (en) * 1975-03-10 1983-05-31 Timex Corporation Electronic timepiece for indicating digital subdivisions of time in a substantially conventional format
US4077032A (en) * 1976-01-07 1978-02-28 Volkman S Alan Electronic display apparatus
JPS53107483U (en) * 1977-02-03 1978-08-29
DE2730069A1 (en) * 1977-07-02 1979-01-11 Braun Ag TIMEPIECE WITH A DISPLAY DEVICE
US4234947A (en) * 1977-12-20 1980-11-18 Citizen Watch Co., Ltd. Solar battery powered timepiece
DE2805646B2 (en) * 1978-02-10 1981-05-07 Braun Ag, 6000 Frankfurt Display device for timepieces with electro-optical elements
DE2931327A1 (en) * 1979-08-02 1981-02-19 Rau Swf Autozubehoer DISPLAY SYSTEM, ESPECIALLY FOR MOTOR VEHICLES
JPS5672416A (en) * 1979-11-19 1981-06-16 Citizen Watch Co Ltd Manufacture of liquid crystal display cell
US4435046A (en) * 1980-04-08 1984-03-06 Citizen Watch Company Limited Liquid crystal display device
GB2090440A (en) * 1980-12-16 1982-07-07 Ebauchesfabrik Eta Ag A watch having an analog display and a digital display
JPS57102611A (en) * 1980-12-19 1982-06-25 Asahi Glass Co Ltd Liquid crystal display device equipped with mask
DE3233699C2 (en) * 1981-02-03 1987-04-23 Mitsubishi Electric Corp Liquid crystal display device
JPS58162931A (en) * 1982-03-23 1983-09-27 Nippon Denso Co Ltd Transmission type color liquid crystal display
US4541692A (en) * 1983-05-31 1985-09-17 General Electric Company Transflective liquid crystal display with enhanced contrast ratio
GB2143987A (en) * 1983-07-20 1985-02-20 Timex Corp Time display for LCD analog timepiece
JPH0412535Y2 (en) * 1986-01-17 1992-03-26
US4838661A (en) * 1988-01-05 1989-06-13 Motorola, Inc. Liquid crystal light emitting display system
US4815824A (en) * 1988-02-23 1989-03-28 Sharples Kenneth R Elliptical LCD bar graph with path outline-defining segments

Also Published As

Publication number Publication date
EP0475281A2 (en) 1992-03-18
US5130827A (en) 1992-07-14
IL99319A (en) 1994-02-27
CA2050393C (en) 1994-05-31
EP0475281A3 (en) 1992-05-20
IL99319A0 (en) 1992-07-15

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed