JPS5790186A - Electrochromic display type electronic watch - Google Patents

Electrochromic display type electronic watch

Info

Publication number
JPS5790186A
JPS5790186A JP55166888A JP16688880A JPS5790186A JP S5790186 A JPS5790186 A JP S5790186A JP 55166888 A JP55166888 A JP 55166888A JP 16688880 A JP16688880 A JP 16688880A JP S5790186 A JPS5790186 A JP S5790186A
Authority
JP
Japan
Prior art keywords
color
segment
indication
level
erasion
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
JP55166888A
Other languages
Japanese (ja)
Inventor
Shiyuuji Maezawa
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 Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP55166888A priority Critical patent/JPS5790186A/en
Publication of JPS5790186A publication Critical patent/JPS5790186A/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
    • G04G9/0047—Details electrical, e.g. selection or application of the operating voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

PURPOSE:To achieve an indication constant in the coloring level with a relatively simple circuit and a low current consumption by controlling the erasion of color through a discharge in the state of developing color invariable created by comparing the drive potential with the reference potential. CONSTITUTION:As the coloring potential reaches a fixed value VRE with the driving of segments Ma, Mb... for minute indication in 7 segments, the output of a comparator 512 is inverted to so high a level that a latch output BQT is generated from a D type FF513 to control D type FFs 520, 521... thereby opening an analog switch through NAND gates 540, 541.... This shuts off the segment drive voltage allowing each segment to be colored in a fixed color. At the erasion of color, the segment involved is turned off and an analog switch is turned on causing common electrodes to be short-circuited with the segment electrodes Ma... thereby preventing the application of reverse voltage. The color can be erased with a discharge enabling the indication at a constant color level with a simple circuit structure and a low current consumption.
JP55166888A 1980-11-27 1980-11-27 Electrochromic display type electronic watch Pending JPS5790186A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55166888A JPS5790186A (en) 1980-11-27 1980-11-27 Electrochromic display type electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55166888A JPS5790186A (en) 1980-11-27 1980-11-27 Electrochromic display type electronic watch

Publications (1)

Publication Number Publication Date
JPS5790186A true JPS5790186A (en) 1982-06-04

Family

ID=15839476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55166888A Pending JPS5790186A (en) 1980-11-27 1980-11-27 Electrochromic display type electronic watch

Country Status (1)

Country Link
JP (1) JPS5790186A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0279346A (en) * 1988-09-14 1990-03-19 Futaba Corp Fluorescent character display tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0279346A (en) * 1988-09-14 1990-03-19 Futaba Corp Fluorescent character display tube

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