GB1417958A - Display device of the passive type - Google Patents

Display device of the passive type

Info

Publication number
GB1417958A
GB1417958A GB1833474A GB1833474A GB1417958A GB 1417958 A GB1417958 A GB 1417958A GB 1833474 A GB1833474 A GB 1833474A GB 1833474 A GB1833474 A GB 1833474A GB 1417958 A GB1417958 A GB 1417958A
Authority
GB
United Kingdom
Prior art keywords
display device
light
source
disposed
conductor
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.)
Expired
Application number
GB1833474A
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.)
Suwa Seikosha KK
Original Assignee
Suwa Seikosha KK
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 Suwa Seikosha KK filed Critical Suwa Seikosha KK
Priority to GB1833474A priority Critical patent/GB1417958A/en
Publication of GB1417958A publication Critical patent/GB1417958A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0023—Visual time or date indication means by light valves in general
    • G04G9/0029—Details
    • G04G9/0035—Details constructional
    • G04G9/0041—Illumination devices

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

1417958 Modulating light SUWA SEIKOSHA KK 26 April 1974 18334/74 Heading H4F [Also in Division G5] A light conductor 14 with an irregular surface 15 is disposed between an electro-optic display device 1-5 and a reflector 8 so that in use it receives light from a source 10 and enables the display to be more uniformly illuminated over its whole area. As particularly described, the conductor 14 is translucent, e.g. frosted glass, and the device 1-5 is a liquid crystal cell exhibiting voltage dependent optical activity (twist cell) and is disposed between crossed polarizers 6, 7. Alternatively the display device may comprise ferroelectric material. The arrangement is said to be useful in battery powered devices such as wrist watches, in which the source 10 is essentially a low power point source and is used only when sufficient incident light is not available.
GB1833474A 1974-04-26 1974-04-26 Display device of the passive type Expired GB1417958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1833474A GB1417958A (en) 1974-04-26 1974-04-26 Display device of the passive type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1833474A GB1417958A (en) 1974-04-26 1974-04-26 Display device of the passive type

Publications (1)

Publication Number Publication Date
GB1417958A true GB1417958A (en) 1975-12-17

Family

ID=10110688

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1833474A Expired GB1417958A (en) 1974-04-26 1974-04-26 Display device of the passive type

Country Status (1)

Country Link
GB (1) GB1417958A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0886171A1 (en) * 1997-06-20 1998-12-23 Koninklijke Philips Electronics N.V. Liquid crystal display device and electronic appliance comprising the same
EP1063561A1 (en) * 1999-06-11 2000-12-27 Mannesmann VDO Aktiengesellschaft Liquid crystal display device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0886171A1 (en) * 1997-06-20 1998-12-23 Koninklijke Philips Electronics N.V. Liquid crystal display device and electronic appliance comprising the same
US6151087A (en) * 1997-06-20 2000-11-21 U.S. Philips Corporation Liquid crystal display having a light source through an opening of a reflective film covering a side edge of a substrate
US6396552B1 (en) 1999-01-05 2002-05-28 Mannesmann Vdo Ag Liquid crystal display having light deflecting element on a surface of a substrate, facing the liquid crystal cell
EP1063561A1 (en) * 1999-06-11 2000-12-27 Mannesmann VDO Aktiengesellschaft Liquid crystal display device

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940425