JPH0216596A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPH0216596A
JPH0216596A JP16586088A JP16586088A JPH0216596A JP H0216596 A JPH0216596 A JP H0216596A JP 16586088 A JP16586088 A JP 16586088A JP 16586088 A JP16586088 A JP 16586088A JP H0216596 A JPH0216596 A JP H0216596A
Authority
JP
Japan
Prior art keywords
signal
circuit
half
amplitude
device
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
JP16586088A
Inventor
Masaaki Kitajima
Junichi Owada
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 JP16586088A priority Critical patent/JPH0216596A/en
Publication of JPH0216596A publication Critical patent/JPH0216596A/en
Application status is Granted legal-status Critical

Links

Abstract

PURPOSE: To make a half-tone display without making a signal circuit complex by generating an effective voltage required for half-tones by voltage amplitude modulation wherein the amplitude of a signal voltage is varied in a period of plural frames and time modulation wherein the on time of signal data is varied.
CONSTITUTION: This device consists of a display part 1 where a thin film transistor(TFT) 3 and liquid crystal 2 are laminated, a signal circuit 6 which generates a signal voltage Vd, a scanning circuit 7 which generates a scanning signal Vg, a frame memory 8 for storing half-tone image data, a data modulating circuit 9 which imposes amplitude and time modulation upon the half-tone image data inputted from outside the device according to the half-tones and outputs the result, and a control circuit 10 which controls the whole device. An external system 11 composed of a microcomputer, etc., is connected to the device. Consequently, a signal circuit can be composed of a digital circuit and simplified.
COPYRIGHT: (C)1990,JPO&Japio
JP16586088A 1988-07-05 1988-07-05 Liquid crystal display device Granted JPH0216596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16586088A JPH0216596A (en) 1988-07-05 1988-07-05 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16586088A JPH0216596A (en) 1988-07-05 1988-07-05 Liquid crystal display device

Publications (1)

Publication Number Publication Date
JPH0216596A true JPH0216596A (en) 1990-01-19

Family

ID=15820366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16586088A Granted JPH0216596A (en) 1988-07-05 1988-07-05 Liquid crystal display device

Country Status (1)

Country Link
JP (1) JPH0216596A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04177321A (en) * 1990-11-13 1992-06-24 Nec Corp Driving method of liquid crystal display panel
JPH0527713A (en) * 1991-07-25 1993-02-05 Casio Comput Co Ltd Display driving device and display device
JPH05249436A (en) * 1992-02-05 1993-09-28 Nec Corp Method for driving active matrix type liquid crystal display device
JPH0659276A (en) * 1991-03-27 1994-03-04 Semiconductor Energy Lab Co Ltd Electro-optical device
JPH06123878A (en) * 1991-03-27 1994-05-06 Semiconductor Energy Lab Co Ltd Electro-optical device
JPH06202083A (en) * 1993-01-07 1994-07-22 Nec Corp Liquid crystal panel driving method
JPH07294881A (en) * 1994-04-20 1995-11-10 Kodo Eizo Gijutsu Kenkyusho:Kk Liquid crystal display device
US7479939B1 (en) 1991-02-16 2009-01-20 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55129399A (en) * 1979-03-29 1980-10-07 Sony Corp Xy matrix display unit
JPS5918995A (en) * 1982-07-23 1984-01-31 Suwa Seikosha Kk Driving system for matrix display panel
JPS62145291A (en) * 1985-12-20 1987-06-29 Casio Computer Co Ltd Driving system of liquid crystal panel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55129399A (en) * 1979-03-29 1980-10-07 Sony Corp Xy matrix display unit
JPS5918995A (en) * 1982-07-23 1984-01-31 Suwa Seikosha Kk Driving system for matrix display panel
JPS62145291A (en) * 1985-12-20 1987-06-29 Casio Computer Co Ltd Driving system of liquid crystal panel

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04177321A (en) * 1990-11-13 1992-06-24 Nec Corp Driving method of liquid crystal display panel
US7479939B1 (en) 1991-02-16 2009-01-20 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device
JPH0659276A (en) * 1991-03-27 1994-03-04 Semiconductor Energy Lab Co Ltd Electro-optical device
JPH06123878A (en) * 1991-03-27 1994-05-06 Semiconductor Energy Lab Co Ltd Electro-optical device
JPH0527713A (en) * 1991-07-25 1993-02-05 Casio Comput Co Ltd Display driving device and display device
JPH05249436A (en) * 1992-02-05 1993-09-28 Nec Corp Method for driving active matrix type liquid crystal display device
JPH06202083A (en) * 1993-01-07 1994-07-22 Nec Corp Liquid crystal panel driving method
JPH07294881A (en) * 1994-04-20 1995-11-10 Kodo Eizo Gijutsu Kenkyusho:Kk Liquid crystal display device

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