JPS55650A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPS55650A
JPS55650A JP7347278A JP7347278A JPS55650A JP S55650 A JPS55650 A JP S55650A JP 7347278 A JP7347278 A JP 7347278A JP 7347278 A JP7347278 A JP 7347278A JP S55650 A JPS55650 A JP S55650A
Authority
JP
Japan
Prior art keywords
liquid crystal
scanning
crystal display
circuit
picture
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
JP7347278A
Other languages
Japanese (ja)
Other versions
JPS6238905B2 (en
Inventor
Katsuyuki Ikeda
Minoru Hosokawa
Satoru Yazawa
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 JP7347278A priority Critical patent/JPS55650A/en
Publication of JPS55650A publication Critical patent/JPS55650A/en
Publication of JPS6238905B2 publication Critical patent/JPS6238905B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Liquid Crystal Display Device Control (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Electric Clocks (AREA)

Abstract

PURPOSE: To prevent the quality deterioration of the display picture caused by the lack or unevenness of the holding time of the voltage applied to the electrode of the liquid crystal display substance by setting the scanning frequency according to the time constant of each picture element in the liquid crystal display substance.
CONSTITUTION: The video signal drawn out at video detection circuit 401 undergoes A/D conversion 402 and then memorized temporarily in auxiliary memory circuit 403. This memory contents is conveyed to main memory circuit 406 within the blanking time of each scanning line. Circuit 406 always holds the data equivalent to one frame of the picture, and this data is read out by multiplexer 409 and circuit 408 which generates the timing signal deciding the scanning velocity to be given D/A donversion 409 and then to be returned to the original video signal. The D/A-converted video signal is sent to analog multiplexer 410 for sequential scanning of each column. In such constitution, the scanning velocity is eliminated for liquid crystal display panel 412, and accordingly the next scanning is carried out before the charge stored in the capacity between electrodes of the capacitor of each picture element and the liquid crystal panel gets away. Thus, the sufficiently high quality can be kept for the display picture.
COPYRIGHT: (C)1980,JPO&Japio
JP7347278A 1978-06-16 1978-06-16 Liquid crystal display device Granted JPS55650A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7347278A JPS55650A (en) 1978-06-16 1978-06-16 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7347278A JPS55650A (en) 1978-06-16 1978-06-16 Liquid crystal display device

Publications (2)

Publication Number Publication Date
JPS55650A true JPS55650A (en) 1980-01-07
JPS6238905B2 JPS6238905B2 (en) 1987-08-20

Family

ID=13519241

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7347278A Granted JPS55650A (en) 1978-06-16 1978-06-16 Liquid crystal display device

Country Status (1)

Country Link
JP (1) JPS55650A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57106282A (en) * 1980-12-23 1982-07-02 Citizen Watch Co Ltd Micro television
JPS5875620A (en) * 1981-10-29 1983-05-07 Matsushita Electric Ind Co Ltd Combustion control circuit
JPS60106278A (en) * 1983-11-15 1985-06-11 Sony Corp Active matrix type display device
JPS61225514A (en) * 1985-03-29 1986-10-07 Matsushita Electric Ind Co Ltd Control device for petroleum burner

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02144004U (en) * 1989-05-11 1990-12-06

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57106282A (en) * 1980-12-23 1982-07-02 Citizen Watch Co Ltd Micro television
JPS5875620A (en) * 1981-10-29 1983-05-07 Matsushita Electric Ind Co Ltd Combustion control circuit
JPH0141905B2 (en) * 1981-10-29 1989-09-08 Matsushita Electric Ind Co Ltd
JPS60106278A (en) * 1983-11-15 1985-06-11 Sony Corp Active matrix type display device
JPS61225514A (en) * 1985-03-29 1986-10-07 Matsushita Electric Ind Co Ltd Control device for petroleum burner

Also Published As

Publication number Publication date
JPS6238905B2 (en) 1987-08-20

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