JPS5453922A - Luminance modulation system of video display unit - Google Patents

Luminance modulation system of video display unit

Info

Publication number
JPS5453922A
JPS5453922A JP11995777A JP11995777A JPS5453922A JP S5453922 A JPS5453922 A JP S5453922A JP 11995777 A JP11995777 A JP 11995777A JP 11995777 A JP11995777 A JP 11995777A JP S5453922 A JPS5453922 A JP S5453922A
Authority
JP
Japan
Prior art keywords
luminance
video signal
converter
instruction value
modulation
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
JP11995777A
Other languages
Japanese (ja)
Other versions
JPS567344B2 (en
Inventor
Hisao Hanmura
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 JP11995777A priority Critical patent/JPS5453922A/en
Priority to FR7828647A priority patent/FR2405603A1/en
Priority to GB7839652A priority patent/GB2006569A/en
Priority to DE19782843706 priority patent/DE2843706A1/en
Priority to NL7810125A priority patent/NL7810125A/en
Publication of JPS5453922A publication Critical patent/JPS5453922A/en
Publication of JPS567344B2 publication Critical patent/JPS567344B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To establish the display unit of high performance which can increase the number of display tones without increasing the scale of the luminance modulation circuit.
CONSTITUTION: In the device having the display element displaying picture, scanning circuit scanning each video element of the display element and the luminance modulator performing luminous modulation into the n tones (n>2) for the luminance of each element of the display element, and designating the degree of modulation of the luminance modulator depending on the video signal, the selection each field of the luminance instruction value K is made with the luminance instruction value K of an odd and even number of fields as shown in table 1 depending on the size of the video signal V. The AD converter AD inputting the video signal V is provided with this circuit, outputting the outputs 20 to 23 of binary number of the video signal V with the converter AD. On the other hand, vertical synchronizing signal SV is fed to FF, and the selection signal EV of a half frequency is outputted and it fed to the full adder FA together with the outputs 20 to 23 of the converter AD. Further, the luminance instruction value K is outputted to the output of the adder FA as shown in table 1
COPYRIGHT: (C)1979,JPO&Japio
JP11995777A 1977-10-07 1977-10-07 Luminance modulation system of video display unit Granted JPS5453922A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP11995777A JPS5453922A (en) 1977-10-07 1977-10-07 Luminance modulation system of video display unit
FR7828647A FR2405603A1 (en) 1977-10-07 1978-10-06 IMAGE PRESENTATION DEVICE
GB7839652A GB2006569A (en) 1977-10-07 1978-10-06 A flat panel image display system
DE19782843706 DE2843706A1 (en) 1977-10-07 1978-10-06 IMAGE PLAYBACK SYSTEM
NL7810125A NL7810125A (en) 1977-10-07 1978-10-06 IMAGE DISPLAY SYSTEM.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11995777A JPS5453922A (en) 1977-10-07 1977-10-07 Luminance modulation system of video display unit

Publications (2)

Publication Number Publication Date
JPS5453922A true JPS5453922A (en) 1979-04-27
JPS567344B2 JPS567344B2 (en) 1981-02-17

Family

ID=14774381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11995777A Granted JPS5453922A (en) 1977-10-07 1977-10-07 Luminance modulation system of video display unit

Country Status (1)

Country Link
JP (1) JPS5453922A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6160089A (en) * 1984-08-31 1986-03-27 Casio Comput Co Ltd Picture display device
JPS61234673A (en) * 1985-04-10 1986-10-18 Casio Comput Co Ltd Picture display device
JPS61246792A (en) * 1985-03-25 1986-11-04 スタンレー電気株式会社 Image display unit
JPS62201790U (en) * 1986-06-13 1987-12-23
JPS63182695A (en) * 1987-01-23 1988-07-27 ホシデン株式会社 Liquid crystal display device
JPH021812A (en) * 1988-06-13 1990-01-08 Ascii Corp Gradation control method, gradation controller, and multigradational display system
JPH0262590A (en) * 1988-08-29 1990-03-02 Hitachi Ltd Liquid crystal display device
JPH02124593A (en) * 1988-06-18 1990-05-11 Hitachi Ltd Gradation display device
JPH02127618A (en) * 1988-11-08 1990-05-16 Yamaha Corp Liquid crystal display circuit
JPH0358020A (en) * 1989-07-27 1991-03-13 Sharp Corp Liquid crystal display device
JPH03132692A (en) * 1989-10-18 1991-06-06 Matsushita Electric Ind Co Ltd Method for driving liquid crystal display device and its driving circuit
JPH0436793A (en) * 1990-05-31 1992-02-06 Seiko Instr Inc Gradation display circuit for display device
JPH0573005A (en) * 1991-09-13 1993-03-26 Casio Comput Co Ltd Picture display device
JPH09120273A (en) * 1996-11-01 1997-05-06 Hitachi Ltd Display circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5923742U (en) * 1982-08-03 1984-02-14 応用電機株式会社 Rubber bands for shorting MOS semiconductors
JP2010061723A (en) * 2008-09-02 2010-03-18 Toppan Printing Co Ltd Semiconductor memory device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6160089A (en) * 1984-08-31 1986-03-27 Casio Comput Co Ltd Picture display device
JPS61246792A (en) * 1985-03-25 1986-11-04 スタンレー電気株式会社 Image display unit
JPS61234673A (en) * 1985-04-10 1986-10-18 Casio Comput Co Ltd Picture display device
JPS62201790U (en) * 1986-06-13 1987-12-23
JPS63182695A (en) * 1987-01-23 1988-07-27 ホシデン株式会社 Liquid crystal display device
JPH021812A (en) * 1988-06-13 1990-01-08 Ascii Corp Gradation control method, gradation controller, and multigradational display system
JPH02124593A (en) * 1988-06-18 1990-05-11 Hitachi Ltd Gradation display device
JPH0262590A (en) * 1988-08-29 1990-03-02 Hitachi Ltd Liquid crystal display device
JPH02127618A (en) * 1988-11-08 1990-05-16 Yamaha Corp Liquid crystal display circuit
JPH0358020A (en) * 1989-07-27 1991-03-13 Sharp Corp Liquid crystal display device
JPH03132692A (en) * 1989-10-18 1991-06-06 Matsushita Electric Ind Co Ltd Method for driving liquid crystal display device and its driving circuit
JPH0436793A (en) * 1990-05-31 1992-02-06 Seiko Instr Inc Gradation display circuit for display device
JPH0573005A (en) * 1991-09-13 1993-03-26 Casio Comput Co Ltd Picture display device
JPH09120273A (en) * 1996-11-01 1997-05-06 Hitachi Ltd Display circuit

Also Published As

Publication number Publication date
JPS567344B2 (en) 1981-02-17

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