JPH0258726U - - Google Patents

Info

Publication number
JPH0258726U
JPH0258726U JP13876288U JP13876288U JPH0258726U JP H0258726 U JPH0258726 U JP H0258726U JP 13876288 U JP13876288 U JP 13876288U JP 13876288 U JP13876288 U JP 13876288U JP H0258726 U JPH0258726 U JP H0258726U
Authority
JP
Japan
Prior art keywords
liquid crystal
signal
generating
crystal driving
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.)
Granted
Application number
JP13876288U
Other languages
Japanese (ja)
Other versions
JPH082650Y2 (en
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 filed Critical
Priority to JP1988138762U priority Critical patent/JPH082650Y2/en
Publication of JPH0258726U publication Critical patent/JPH0258726U/ja
Application granted granted Critical
Publication of JPH082650Y2 publication Critical patent/JPH082650Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Liquid Crystal Display Device Control (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図ないし第３図は本考案の一実施例を示す
もので、第１図は回路構成を示すブロツク図、第
２図は動作を説明するためのタイムチヤート、第
３図は液晶駆動電圧と光透過率との関係を示す特
性曲線図、第４図は従来の液晶駆動装置の動作を
説明するためのタイムチヤート、第５図は従来装
置における液晶駆動電圧と光透過率との関係を示
す特性曲線図である。 １１……ラツチ回路、１２……Ｄ／Ａ変換回路
、１３……ＲＯＭ、１４……カウンタ、１５……
フリツプフロツプ。 Figures 1 to 3 show an embodiment of the present invention. Figure 1 is a block diagram showing the circuit configuration, Figure 2 is a time chart for explaining the operation, and Figure 3 is a liquid crystal drive voltage. Figure 4 is a time chart to explain the operation of a conventional liquid crystal drive device, and Figure 5 is a characteristic curve diagram showing the relationship between liquid crystal drive voltage and light transmittance in a conventional device. FIG. 11...Latch circuit, 12...D/A conversion circuit, 13...ROM, 14...Counter, 15...
Flip flop.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 液晶表示パネルを複数階調の信号に基づいて駆
動する液晶駆動装置において、輝度設定信号に従
つて液晶駆動電圧を発生する電圧発生手段と、上
記液晶駆動電圧に応じて異なるタイミングの輝度
変調パルス作成信号を発生する信号発生手段とを
具備し、上記輝度設定信号に応じて上記液晶駆動
電圧が変化しても、常に所定の光透過率バランス
が得られるように上記輝度変調パルス作成信号の
発生タイミングを設定したことを特徴とする液晶
駆動装置。 In a liquid crystal driving device that drives a liquid crystal display panel based on signals of multiple gradations, there is provided a voltage generating means for generating a liquid crystal driving voltage according to a brightness setting signal, and generating brightness modulation pulses at different timings according to the liquid crystal driving voltage. and a signal generating means for generating a signal, and the generation timing of the luminance modulation pulse generation signal is set such that a predetermined light transmittance balance is always obtained even if the liquid crystal drive voltage changes according to the luminance setting signal. A liquid crystal drive device characterized by setting.
JP1988138762U 1988-10-25 1988-10-25 Liquid crystal drive Expired - Lifetime JPH082650Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988138762U JPH082650Y2 (en) 1988-10-25 1988-10-25 Liquid crystal drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988138762U JPH082650Y2 (en) 1988-10-25 1988-10-25 Liquid crystal drive

Publications (2)

Publication Number Publication Date
JPH0258726U true JPH0258726U (en) 1990-04-26
JPH082650Y2 JPH082650Y2 (en) 1996-01-29

Family

ID=31401403

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988138762U Expired - Lifetime JPH082650Y2 (en) 1988-10-25 1988-10-25 Liquid crystal drive

Country Status (1)

Country Link
JP (1) JPH082650Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010134026A (en) * 2008-12-02 2010-06-17 Canon Inc Device for displaying measurement area information for imaging equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161126U (en) * 1983-04-15 1984-10-29 カシオ計算機株式会社 display device
JPS62289819A (en) * 1986-06-10 1987-12-16 Matsushita Electric Ind Co Ltd Driving method for liquid crystal display device
JPH01219887A (en) * 1988-02-29 1989-09-01 Toshiba Corp Driving method for liquid crystal display device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161126U (en) * 1983-04-15 1984-10-29 カシオ計算機株式会社 display device
JPS62289819A (en) * 1986-06-10 1987-12-16 Matsushita Electric Ind Co Ltd Driving method for liquid crystal display device
JPH01219887A (en) * 1988-02-29 1989-09-01 Toshiba Corp Driving method for liquid crystal display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010134026A (en) * 2008-12-02 2010-06-17 Canon Inc Device for displaying measurement area information for imaging equipment

Also Published As

Publication number Publication date
JPH082650Y2 (en) 1996-01-29

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