JPS5317767A - Lighting device of electronic watch - Google Patents

Lighting device of electronic watch

Info

Publication number
JPS5317767A
JPS5317767A JP9181176A JP9181176A JPS5317767A JP S5317767 A JPS5317767 A JP S5317767A JP 9181176 A JP9181176 A JP 9181176A JP 9181176 A JP9181176 A JP 9181176A JP S5317767 A JPS5317767 A JP S5317767A
Authority
JP
Japan
Prior art keywords
lighting device
electronic watch
electroluminescence
plate
devie
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
JP9181176A
Other languages
Japanese (ja)
Other versions
JPS589392B2 (en
Inventor
Tadashi Hanaoka
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP51091811A priority Critical patent/JPS589392B2/en
Priority to GB31610/77A priority patent/GB1540562A/en
Priority to US05/819,432 priority patent/US4208869A/en
Publication of JPS5317767A publication Critical patent/JPS5317767A/en
Publication of JPS589392B2 publication Critical patent/JPS589392B2/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Liquid Crystal (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)
  • Electric Clocks (AREA)
  • Details Of Measuring Devices (AREA)

Abstract

PURPOSE:To minimize the effect of electric fields and contact an electroluminescence plate to a liquid crystal display device by disposing a shield plate between an electroluminescence devie and a watch circuit.
JP51091811A 1976-07-31 1976-07-31 electronic clock lighting device Expired JPS589392B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP51091811A JPS589392B2 (en) 1976-07-31 1976-07-31 electronic clock lighting device
GB31610/77A GB1540562A (en) 1976-07-31 1977-07-27 Illumination device for electronic timepiece
US05/819,432 US4208869A (en) 1976-07-31 1977-07-27 Illumination device for electronic timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP51091811A JPS589392B2 (en) 1976-07-31 1976-07-31 electronic clock lighting device

Publications (2)

Publication Number Publication Date
JPS5317767A true JPS5317767A (en) 1978-02-18
JPS589392B2 JPS589392B2 (en) 1983-02-21

Family

ID=14037002

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51091811A Expired JPS589392B2 (en) 1976-07-31 1976-07-31 electronic clock lighting device

Country Status (1)

Country Link
JP (1) JPS589392B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0529025U (en) * 1991-09-20 1993-04-16 旭光学工業株式会社 Liquid crystal display

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6118219A (en) * 1994-02-23 2000-09-12 Citizen Watch Co., Ltd. AC driver having three power supply voltages including an internally generated voltage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0529025U (en) * 1991-09-20 1993-04-16 旭光学工業株式会社 Liquid crystal display

Also Published As

Publication number Publication date
JPS589392B2 (en) 1983-02-21

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