JPS5334561A - Luminance adjusting circuit of electronic watch - Google Patents

Luminance adjusting circuit of electronic watch

Info

Publication number
JPS5334561A
JPS5334561A JP10878276A JP10878276A JPS5334561A JP S5334561 A JPS5334561 A JP S5334561A JP 10878276 A JP10878276 A JP 10878276A JP 10878276 A JP10878276 A JP 10878276A JP S5334561 A JPS5334561 A JP S5334561A
Authority
JP
Japan
Prior art keywords
adjusting circuit
electronic watch
luminance adjusting
light emitting
voltage
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.)
Pending
Application number
JP10878276A
Other languages
Japanese (ja)
Inventor
Teisho Fujiyama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10878276A priority Critical patent/JPS5334561A/en
Publication of JPS5334561A publication Critical patent/JPS5334561A/en
Pending 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electric Clocks (AREA)
  • Indicating Measured Values (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

PURPOSE:To prevent character drop-out of light emitting display at the time of brightness adjustment by controlling the output transistors which apply a voltage to each light emitting element with the same threshold voltage.
JP10878276A 1976-09-13 1976-09-13 Luminance adjusting circuit of electronic watch Pending JPS5334561A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10878276A JPS5334561A (en) 1976-09-13 1976-09-13 Luminance adjusting circuit of electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10878276A JPS5334561A (en) 1976-09-13 1976-09-13 Luminance adjusting circuit of electronic watch

Publications (1)

Publication Number Publication Date
JPS5334561A true JPS5334561A (en) 1978-03-31

Family

ID=14493330

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10878276A Pending JPS5334561A (en) 1976-09-13 1976-09-13 Luminance adjusting circuit of electronic watch

Country Status (1)

Country Link
JP (1) JPS5334561A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55146485A (en) * 1979-05-01 1980-11-14 Nippon Electric Co Brightness control circuit
JPS61288193A (en) * 1985-06-17 1986-12-18 Matsushita Electric Ind Co Ltd Electronic timepiece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55146485A (en) * 1979-05-01 1980-11-14 Nippon Electric Co Brightness control circuit
JPS61288193A (en) * 1985-06-17 1986-12-18 Matsushita Electric Ind Co Ltd Electronic timepiece

Similar Documents

Publication Publication Date Title
JPS5292560A (en) Switch box drive pulse width control circuit for electronic clocks
JPS5334561A (en) Luminance adjusting circuit of electronic watch
JPS5271131A (en) Circuit for radiation display use
JPS5356985A (en) Light emitting element driving circuit
JPS51146862A (en) Brightness modulating device for luminous display element wrist watch
JPS5258958A (en) Electronic watch
JPS52152273A (en) Action checking method of light dimming type smoke sensor
JPS5432095A (en) Luminance adjuster circuit
JPS51144268A (en) Total electronic type clock
JPS522388A (en) Luminous diode driving device
JPS52150077A (en) Brightness modulation circuit of electronic watches
JPS5412579A (en) Light output stabilizing method
JPS5229144A (en) Oscillation circuit
JPS5327072A (en) Light emitting diode display watch
JPS5440680A (en) Nephelometer
JPS52106634A (en) Driving circuit for current drive luminous display unit
JPS53122354A (en) C-mos circuit
JPS5282481A (en) Electronic portable watch
JPS5267348A (en) Device using electrochromic display element
JPS5340292A (en) Driving circuit for thin-film electro-iluminescence panel
JPS5383589A (en) Driving circuit for 3-layer thin film element
JPS5410622A (en) Matrix type picture display device
JPS5297734A (en) Drive circuit for led display
JPS53148476A (en) Signal level display circuit
JPS5427470A (en) Constant voltage control circuit