FR2324042A1 - Circuit de commande d'un emetteur de lumiere pour montre electronique a cristal liquide - Google Patents

Circuit de commande d'un emetteur de lumiere pour montre electronique a cristal liquide

Info

Publication number
FR2324042A1
FR2324042A1 FR7626899A FR7626899A FR2324042A1 FR 2324042 A1 FR2324042 A1 FR 2324042A1 FR 7626899 A FR7626899 A FR 7626899A FR 7626899 A FR7626899 A FR 7626899A FR 2324042 A1 FR2324042 A1 FR 2324042A1
Authority
FR
France
Prior art keywords
liquid crystal
control circuit
light emitter
electronic liquid
crystal watch
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
FR7626899A
Other languages
English (en)
French (fr)
Other versions
FR2324042B1 (enExample
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments 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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Publication of FR2324042A1 publication Critical patent/FR2324042A1/fr
Application granted granted Critical
Publication of FR2324042B1 publication Critical patent/FR2324042B1/fr
Granted 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
    • G04G9/0047—Details electrical, e.g. selection or application of the operating voltage
    • G04G9/0052—Details electrical, e.g. selection or application of the operating voltage using means to adjust the display in accordance with the ambient light, e.g. switching or controlling a supplementary light source
    • 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
    • G04G9/0047—Details electrical, e.g. selection or application of the operating voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
FR7626899A 1975-09-09 1976-09-07 Circuit de commande d'un emetteur de lumiere pour montre electronique a cristal liquide Granted FR2324042A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50109322A JPS5233570A (en) 1975-09-09 1975-09-09 Drive circuit for luminous body for illumination for liquid crystal el ectronic watch

Publications (2)

Publication Number Publication Date
FR2324042A1 true FR2324042A1 (fr) 1977-04-08
FR2324042B1 FR2324042B1 (enExample) 1981-06-12

Family

ID=14507278

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7626899A Granted FR2324042A1 (fr) 1975-09-09 1976-09-07 Circuit de commande d'un emetteur de lumiere pour montre electronique a cristal liquide

Country Status (9)

Country Link
US (1) US4051664A (enExample)
JP (1) JPS5233570A (enExample)
BR (1) BR7605766A (enExample)
CA (1) CA1064266A (enExample)
DE (1) DE2640483A1 (enExample)
FR (1) FR2324042A1 (enExample)
GB (1) GB1506670A (enExample)
HK (1) HK84979A (enExample)
IT (1) IT1066495B (enExample)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5473081A (en) * 1977-11-22 1979-06-12 Seiko Epson Corp Fully electronic watch with lamp
JPS54125276U (enExample) * 1978-02-21 1979-09-01
US4181916A (en) * 1978-03-27 1980-01-01 Rca Corporation Liquid crystal channel number display responsive to ambient light level

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962859A (en) * 1971-08-20 1976-06-15 Kabushiki Kaisha Daini Seikosha Cell replacement indication device
US3898790A (en) * 1972-11-09 1975-08-12 Citizen Watch Co Ltd Battery-driven watch with battery consumption display alarm
US3855784A (en) * 1973-07-30 1974-12-24 D Foellner Illuminated time piece
US3911665A (en) * 1974-01-14 1975-10-14 Zenith Radio Corp Electronic timepiece having complementary electro-optical and electro-mechanical displays

Also Published As

Publication number Publication date
HK84979A (en) 1979-12-21
IT1066495B (it) 1985-03-12
GB1506670A (en) 1978-04-12
JPS5233570A (en) 1977-03-14
FR2324042B1 (enExample) 1981-06-12
US4051664A (en) 1977-10-04
BR7605766A (pt) 1978-04-04
CA1064266A (en) 1979-10-16
DE2640483A1 (de) 1977-03-10

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Legal Events

Date Code Title Description
ST Notification of lapse