JPH0990910A - Liquid crystal display device and drive method therefor - Google Patents
Liquid crystal display device and drive method thereforInfo
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- JPH0990910A JPH0990910A JP24756795A JP24756795A JPH0990910A JP H0990910 A JPH0990910 A JP H0990910A JP 24756795 A JP24756795 A JP 24756795A JP 24756795 A JP24756795 A JP 24756795A JP H0990910 A JPH0990910 A JP H0990910A
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- liquid crystal
- crystal display
- display device
- voltage correction
- voltage
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、階調表示を行う
液晶表示装置の駆動方法および液晶表示装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving method of a liquid crystal display device which performs gradation display and a liquid crystal display device.
【０００２】[0002]
【従来の技術】液晶表示装置（ＬＣＤ）は、薄型，省電
力といった特徴から、その需要はますます拡大しつつあ
る。図５は従来の液晶表示装置の構成図であり、テレビ
ジョン用等のビデオ表示装置の例である。2. Description of the Related Art Demand for liquid crystal display devices (LCDs) is ever expanding due to their features such as thinness and power saving. FIG. 5 is a block diagram of a conventional liquid crystal display device, which is an example of a video display device for a television or the like.
【０００３】この従来の液晶表示装置は、マトリクス状
に画素を配置し印加電圧に対する輝度の関係が非線形で
ある液晶表示素子１００と、入力ビデオ信号を所定のレ
ベルに増幅し所定のレベルシフトを行い増幅ビデオ信号
Ｖx を出力する増幅回路１０と、増幅ビデオ信号Ｖx を
液晶表示素子１００のガンマ特性に変換しガンマ変換ビ
デオ信号Ｖy を出力する電圧補正回路２０と、ガンマ変
換ビデオ信号Ｖy の極性を所定の周期で反転する駆動電
圧回路３０と、その出力を受け液晶表示素子１００に信
号電圧を印加するデータバスドライバ１１０と、液晶表
示素子１００に走査電圧を印加するスキャンバスドライ
バ１２０と、駆動電圧回路３０，データバスドライバ１
１０およびスキャンバスドライバ１２０をビデオ信号と
同期させて駆動するタイミング発生回路４０とからなる
（例えば、テレビジョン学会編，大越孝敬監修「液晶デ
ィスプレイ」第７章第５節ｐ．２２１〜ｐ．２２６，昭
晃堂，昭和６０年）。In this conventional liquid crystal display device, pixels are arranged in a matrix form and a liquid crystal display element 100 in which the relationship of luminance to applied voltage is non-linear, and an input video signal is amplified to a predetermined level and a predetermined level shift is performed. an amplifier circuit 10 which outputs the amplified video signal V x, and converts the amplified video signal V x to the gamma characteristics of the liquid crystal display device 100 voltage correction circuit 20 that outputs a gamma conversion video signal V y, gamma conversion video signal V y A drive voltage circuit 30 for inverting the polarity of the liquid crystal display device in a predetermined cycle, a data bus driver 110 for applying a signal voltage to the liquid crystal display element 100 receiving the output, and a scan bus driver 120 for applying a scan voltage to the liquid crystal display element 100. , Drive voltage circuit 30, data bus driver 1
10 and a timing generation circuit 40 for driving the scan bus driver 120 in synchronization with a video signal (for example, edited by the Television Society, edited by Takataka Ohkoshi, "Liquid Crystal Display", Chapter 7, Section 5, p.221 to p.226). , Shokoido, 1985).
【０００４】ここで、液晶表示素子１００は、アクティ
ブマトリックス型の液晶表示素子であり、液晶表示素子
１００を挟んで両側に偏光板を配置し、液晶層に電圧が
印加されない時に「明」状態となり、電圧が印加された
時に「暗」状態となるノーマリーホワイトモードに、偏
光板の偏光軸を設定している。このノーマリーホワイト
モードに設定した従来の液晶表示装置における液晶表示
素子１００の１つの表示画素について、ガンマ特性すな
わち印加電圧に対する輝度（透過率に相当）特性（以下
「Ｖ−Ｔ特性」と称す）を、図６に示す。図６（ａ）は
液晶表示装置の真正面（法線方向，θ＝０°）から見た
場合のＶ−Ｔ特性で、図６（ｂ）は液晶表示装置の下方
向θ＝３０°に視点を傾けて見た場合のＶ−Ｔ特性であ
る。Here, the liquid crystal display element 100 is an active matrix type liquid crystal display element, and polarizing plates are arranged on both sides of the liquid crystal display element 100 with the liquid crystal display element 100 sandwiched therebetween, and the liquid crystal display element is in a "bright" state when no voltage is applied to the liquid crystal layer. , The polarization axis of the polarizing plate is set to the normally white mode, which is in a “dark” state when a voltage is applied. For one display pixel of the liquid crystal display element 100 in the conventional liquid crystal display device set in the normally white mode, the gamma characteristic, that is, the luminance (corresponding to the transmittance) characteristic with respect to the applied voltage (hereinafter referred to as “VT characteristic”). Is shown in FIG. FIG. 6A shows the VT characteristic when viewed from the front of the liquid crystal display device (normal direction, θ = 0 °), and FIG. 6B shows the view point in the downward direction θ = 30 ° of the liquid crystal display device. Is a VT characteristic when viewed by tilting.
【０００５】図６に示すように、従来の液晶表示装置に
おいて８階調表示をさせるとき、まず真正面（θ＝０
°）から見て輝度を８等分割し、分割した各々の輝度レ
ベル（B1，B2，・・・・，B8）に対して、印加電圧レベル
（V1，V2，・・・・，V8）を設定する。一方、視点を下方向
に３０°傾けた場合、図６（ｂ）に示すようにＶ−Ｔ特
性はθ＝０°の場合に比べて低電圧側にシフトするとと
もに、高電圧側に新たなピークが現れる。この状態で各
印加電圧レベル（V1，V2，・・・・，V8）に対する輝度レベ
ル（B1',B2',・・・・,B8'）を見てみると、高輝度領域（低
印加電圧領域）では輝度レベル間の差が大きくなり、低
輝度領域（高印加電圧領域）では輝度レベル間の差が小
さくなる。これは目視では、正面から見た画像に比べて
非常に暗い画像として見える（黒つぶれ現象と称す）。
さらに、印加電圧レベルV7とV8における輝度レベルの関
係が真正面（θ＝０°）から見た場合とは逆転してい
る。これは階調反転現象と呼ばれ、目視では写真のネガ
のような画像として見える。As shown in FIG. 6, when displaying 8 gradations in a conventional liquid crystal display device, first of all, a front surface (θ = 0) is displayed.
The brightness is divided into eight equal parts, and the applied voltage level (V1, V2, ..., V8) is applied to each of the divided brightness levels (B1, B2, ..., B8). Set. On the other hand, when the viewpoint is tilted downward by 30 °, the VT characteristic shifts to the low voltage side as compared to the case of θ = 0 ° as shown in FIG. The peak appears. Looking at the brightness levels (B1 ', B2', ..., B8 ') for each applied voltage level (V1, V2, ..., V8) in this state, the high brightness region (low applied voltage The difference between the brightness levels becomes large in the area), and the difference between the brightness levels becomes small in the low brightness area (high applied voltage area). This is visually seen as a very dark image compared to the image viewed from the front (called a blackout phenomenon).
Furthermore, the relationship between the luminance levels at the applied voltage levels V7 and V8 is opposite to that when viewed from the front (θ = 0 °). This is called a gradation inversion phenomenon, and it looks like a negative image of a photograph by visual observation.
【０００６】[0006]
【発明が解決しようとする課題】以上のように、従来の
液晶表示装置では、視点を傾けると、階調表示がかなり
悪化し、特にテレビジョン等のビデオ表示を行う場合、
反転現象などが著しく、表示特性が変化し、視角特性が
悪いという問題があった。また、表示特性の変化を防ぐ
ためには、視点を制限されてしまい、さらに、大画面パ
ネルであれば、視点を制限しても、表示領域の上下端間
の視角が大きくなるために表示の上下で表示特性が大き
く異なってしまうという問題を有していた。As described above, in the conventional liquid crystal display device, when the viewpoint is tilted, gradation display is considerably deteriorated, and particularly when video display such as television is performed,
There is a problem that the reversal phenomenon is remarkable, the display characteristics are changed, and the viewing angle characteristics are poor. In addition, in order to prevent the change of the display characteristics, the viewpoint is limited. Furthermore, if the viewpoint is large, even if the viewpoint is restricted, the viewing angle between the upper and lower ends of the display area becomes large, so However, there is a problem in that the display characteristics greatly differ.
【０００７】この発明はかかる点に鑑み、黒つぶれ現象
や反転現象等の階調表示の悪化を低減し、液晶表示素子
が大画面パネルであっても視角特性を改善できる液晶表
示装置の駆動方法および液晶表示装置を提供することを
目的とする。In view of the above, the present invention reduces the deterioration of gradation display such as a blackout phenomenon and a reversal phenomenon and improves the viewing angle characteristics even when the liquid crystal display element is a large screen panel. Another object is to provide a liquid crystal display device.
【０００８】[0008]
【課題を解決するための手段】請求項１記載の液晶表示
装置の駆動方法は、マトリクス状に画素を配置し印加電
圧に対する輝度の関係が非線形な液晶表示素子を駆動す
る液晶表示装置の駆動方法であって、同一レベルの入力
信号に対して異なる印加電圧に変換する複数の変換方法
により生成した複数の印加電圧を、画素に選択的に印加
することを特徴とする。これにより、複数の変換方法の
特性が視覚的に合成されるため、黒つぶれ現象や反転現
象等の階調表示の悪化を低減し、液晶表示素子が大画面
パネルであっても視覚特性を改善することができる。According to a first aspect of the present invention, there is provided a method of driving a liquid crystal display device, wherein pixels are arranged in a matrix and a liquid crystal display element having a non-linear relation of luminance to applied voltage is driven. It is characterized in that a plurality of applied voltages generated by a plurality of conversion methods for converting input signals of the same level into different applied voltages are selectively applied to the pixels. As a result, the characteristics of multiple conversion methods are visually combined, reducing the deterioration of gradation display such as the blackout phenomenon and the inversion phenomenon, and improving the visual characteristics even when the liquid crystal display device is a large screen panel. can do.
【０００９】請求項２記載の液晶表示装置の駆動方法
は、請求項１記載の液晶表示装置の駆動方法において、
マトリクス状の同じ行または同じ列に配置した画素に
は、同一の変換方法により生成した印加電圧を印加する
ようにしている。請求項３記載の液晶表示装置は、マト
リクス状に画素を配置し印加電圧に対する輝度の関係が
非線形である液晶表示素子を備えた液晶表示装置であっ
て、同一レベルの入力信号に対して異なる印加電圧に変
換する複数の変換手段と、この複数の変換手段により変
換した複数の印加電圧を画素に選択的に印加するための
切換え手段とを設けたことを特徴とする。これにより、
複数の変換手段の特性が視覚的に合成されるため、黒つ
ぶれ現象や反転現象等の階調表示の悪化を低減し、液晶
表示素子が大画面パネルであっても視覚特性を改善する
ことができる。A method of driving a liquid crystal display device according to a second aspect is the method of driving a liquid crystal display device according to the first aspect.
The applied voltage generated by the same conversion method is applied to pixels arranged in the same row or the same column in a matrix. 4. The liquid crystal display device according to claim 3, wherein the liquid crystal display device is provided with liquid crystal display elements in which pixels are arranged in a matrix and the relationship of luminance to applied voltage is non-linear, and different application is applied to input signals of the same level. It is characterized in that a plurality of converting means for converting into a voltage and a switching means for selectively applying a plurality of applied voltages converted by the plurality of converting means to a pixel are provided. This allows
Since the characteristics of a plurality of conversion means are visually combined, it is possible to reduce the deterioration of gradation display such as the blackout phenomenon and the inversion phenomenon, and to improve the visual characteristics even if the liquid crystal display element is a large screen panel. it can.
【００１０】[0010]
【発明の実施の形態】図１はこの発明の実施の形態の液
晶表示装置の構成図である。図１において、１０は入力
ビデオ信号を所定のレベルに増幅し所定のレベルシフト
を行い増幅ビデオ信号Ｖx を出力する増幅回路、２１
Ａ，２１Ｂは増幅ビデオ信号Ｖx を液晶表示素子１００
のガンマ特性に変換しガンマ変換ビデオ信号（ＶyA，Ｖ
yB）を出力する電圧補正回路、３１はガンマ変換ビデオ
信号ＶyA，ＶyBの極性を所定の周期で反転するとともに
その一方を切換え出力する駆動電圧回路、４１は駆動電
圧回路３１，データバスドライバ１１０およびスキャン
バスドライバ１２０をビデオ信号と同期させて駆動する
タイミング発生回路である。液晶表示素子１００，デー
タバスドライバ１１０およびスキャンバスドライバ１２
０は、図５に示す従来の液晶表示装置と同様の構成であ
る。1 is a block diagram of a liquid crystal display device according to an embodiment of the present invention. In FIG. 1, reference numeral 10 denotes an amplifier circuit that amplifies an input video signal to a predetermined level, performs a predetermined level shift, and outputs an amplified video signal V x , 21
A and 21B indicate the amplified video signal V x to the liquid crystal display device 100.
Gamma conversion video signal (V yA , V yA
voltage correction circuit for outputting a yB), the driving voltage circuit for outputting switching the one with inverted gamma conversion video signal V yA, the polarity of the V yB in a predetermined cycle 31, 41 drive voltage circuit 31, the data bus driver It is a timing generation circuit for driving the 110 and the scan bus driver 120 in synchronization with the video signal. Liquid crystal display device 100, data bus driver 110, and scan bus driver 12
0 has the same configuration as that of the conventional liquid crystal display device shown in FIG.
【００１１】この液晶表示装置は、異なる入出力特性を
有する２種類の電圧補正回路２１Ａ，２１Ｂを設けてあ
り、駆動電圧回路３１は、電圧補正回路２１Ａ，２１Ｂ
の出力ＶyA，ＶyBを入力し、反転あるいは非反転の
ＶyA，ＶyBを、データバスドライバ１１０から液晶表示
素子１００のマトリクス状に配置された所定の画素毎に
印加できるように、切換え出力するようになっている。
なお、電圧補正回路２１Ａ，２１Ｂが変換手段（請求項
３）に相当し、駆動電圧回路３１が切換え手段（請求項
３）を兼ねている。This liquid crystal display device is provided with two types of voltage correction circuits 21A and 21B having different input / output characteristics, and the drive voltage circuit 31 is a voltage correction circuit 21A and 21B.
Output V yA and V yB are input, and inverted or non-inverted V yA and V yB are switched so that they can be applied from the data bus driver 110 to each predetermined pixel arranged in a matrix of the liquid crystal display element 100. It is designed to output.
The voltage correction circuits 21A and 21B correspond to conversion means (claim 3), and the drive voltage circuit 31 also serves as switching means (claim 3).
【００１２】図２は２種類の電圧補正回路２１Ａ，２１
Ｂの入出力特性図であり、曲線Ａが電圧補正回路２１Ａ
の入出力特性を示し、曲線Ｂが電圧補正回路２１Ｂの入
出力特性を示す。ここで、電圧補正回路２１Ａ，２１Ｂ
の入出力特性は、例えば、その平均値が所望の特性にな
るように設定する。また、図３はこの液晶表示装置の入
力のビデオ信号に対する輝度を示す図であり、図３
（ａ）は液晶表示装置の真正面（θ＝０°）から見た場
合の特性を示し、図３（ｂ）は液晶表示装置の下方向θ
＝３０°に視点を傾けて見た場合の特性を示す。FIG. 2 shows two types of voltage correction circuits 21A and 21A.
It is an input / output characteristic diagram of B, and curve A shows voltage correction circuit 21A.
And the curve B shows the input / output characteristics of the voltage correction circuit 21B. Here, the voltage correction circuits 21A and 21B
The input / output characteristic of is set, for example, so that its average value becomes a desired characteristic. Further, FIG. 3 is a diagram showing the luminance of the input video signal of this liquid crystal display device.
FIG. 3A shows the characteristics when viewed from directly in front of the liquid crystal display device (θ = 0 °), and FIG. 3B shows the downward direction θ of the liquid crystal display device.
The characteristics when the viewpoint is tilted at = 30 ° are shown.
【００１３】ここで、駆動電圧回路３１が常に電圧補正
回路２１Ａの出力ＶyAの反転・非反転信号を出力すると
した場合（すなわち電圧補正回路２１Ｂがない場合）の
ビデオ信号に対する輝度は、図３（ａ），（ｂ）の点線
Ａとなる。また、駆動電圧回路３１が常に電圧補正回路
２１Ｂの出力ＶyBの反転・非反転信号を出力するとした
場合（すなわち電圧補正回路２１Ａがない場合）のビデ
オ信号に対する輝度は、図３（ａ），（ｂ）の破線Ｂと
なる。Here, the luminance for the video signal when the drive voltage circuit 31 always outputs an inverted / non-inverted signal of the output V yA of the voltage correction circuit 21A (that is, when the voltage correction circuit 21B is not provided) is shown in FIG. It becomes a dotted line A in (a) and (b). Further, when the drive voltage circuit 31 always outputs the inverted / non-inverted signal of the output V yB of the voltage correction circuit 21B (that is, when the voltage correction circuit 21A is not provided), the luminance with respect to the video signal is as shown in FIG. It becomes a broken line B in (b).
【００１４】この実施の形態では、駆動電圧回路３１
が、反転あるいは非反転の電圧補正回路２１Ａ，２１Ｂ
の出力ＶyA，ＶyBを所定の画素毎に切換え出力すること
により、図３（ａ），（ｂ）に示すように、点線Ａと破
線Ｂの特性が平均化された「合成」の特性が得られる。
図４は所定の画素毎に電圧補正回路２１Ａ，２１Ｂを選
択するパターン例を示し、図４（ａ）は水平ライン毎
に、図４（ｂ）は垂直ライン毎に、図４（ｃ）は１ドッ
ト毎に、電圧補正回路２１Ａ，２１Ｂを切り換えた場合
である。なお、図４において、Ａは電圧補正回路２１Ａ
を選択した画素、Ｂは電圧補正回路２１Ｂを選択した画
素である。In this embodiment, the drive voltage circuit 31
However, inversion or non-inversion voltage correction circuits 21A and 21B
By switching and outputting the outputs V yA and V yB of each of the predetermined pixels, as shown in FIGS. 3A and 3B, the characteristic of “composite” in which the characteristics of the dotted line A and the broken line B are averaged. Is obtained.
FIG. 4 shows a pattern example for selecting the voltage correction circuits 21A and 21B for each predetermined pixel. FIG. 4A shows each horizontal line, FIG. 4B shows each vertical line, and FIG. This is a case where the voltage correction circuits 21A and 21B are switched for each dot. In FIG. 4, A is a voltage correction circuit 21A.
B is a pixel for which the voltage correction circuit 21B is selected.
【００１５】以上のように、この実施の形態によれば、
異なる入出力特性を有する２種類の電圧補正回路２１
Ａ，２１Ｂを設け、反転あるいは非反転の電圧補正回路
２１Ａ，２１Ｂの出力ＶyA，ＶyBを、例えば図４に示す
ように所定の画素毎に選択することにより、液晶表示素
子１００の解像度が比較的高ければ、２種類の電圧補正
回路２１Ａ，２１Ｂの特性が視覚的に合成されるため、
黒つぶれ現象や反転現象等の階調表示の悪化を低減し、
液晶表示素子１００が大画面パネルであっても視覚特性
を改善することができる。特に、ビデオ表示等における
反転現象は「暗」表示域のみで発生することから、図２
の「暗」信号（ＶxL）側のみの特性を変えることで、
「暗」表示域以外の解像度を低下させることなしに反転
現象を低減できる。図３（ｂ）で示す視点がθ＝３０゜
の場合、Ａ，Ｂの特性に比べて「合成」の特性の方が反
転現象が低減している。As described above, according to this embodiment,
Two types of voltage correction circuits 21 having different input / output characteristics
A and 21B are provided, and the outputs V yA and V yB of the inversion or non-inversion voltage correction circuits 21A and 21B are selected for each predetermined pixel, for example, as shown in FIG. If it is relatively high, the characteristics of the two types of voltage correction circuits 21A and 21B are visually combined,
Reduces deterioration of gradation display such as blackout phenomenon and inversion phenomenon,
Even if the liquid crystal display device 100 is a large screen panel, the visual characteristics can be improved. In particular, since the inversion phenomenon in the video display or the like occurs only in the “dark” display area,
By changing the characteristics only on the “dark” signal (V xL ) side of
The inversion phenomenon can be reduced without reducing the resolution other than the "dark" display area. When the viewpoint shown in FIG. 3B is θ = 30 °, the reversal phenomenon is smaller in the “composite” characteristic than in the A and B characteristics.
【００１６】また、液晶表示素子１００の構成を変える
ことなしに視角特性を改善でき、特に「暗」表示域での
反転現象の低減が可能となるため、表示内容等用途によ
り視角特性や解像度を要求が異なる液晶表示装置に、同
一の特性，構成の液晶表示素子を用いることが可能とな
り、その実用的効果は大きい。なお、電圧補正回路２１
Ａ，２１Ｂの特性および所定の画素毎に選択する電圧補
正回路２１Ａ，２１Ｂの選択パターンを表示内容、用途
によって変更してもよい。Further, the viewing angle characteristics can be improved without changing the configuration of the liquid crystal display element 100, and the inversion phenomenon can be reduced particularly in the "dark" display area. Liquid crystal display devices having the same characteristics and configurations can be used for liquid crystal display devices having different requirements, and the practical effect thereof is great. The voltage correction circuit 21
The characteristics of A and 21B and the selection pattern of the voltage correction circuits 21A and 21B that are selected for each predetermined pixel may be changed depending on the display content and application.
【００１７】また、電圧補正回路２１Ａ，２１Ｂを２種
類としたが、２種類以上の電圧補正回路を用いてもよ
い。例えば、垂直または水平方向にＲＧＢカラーフィル
タを配列した液晶表示素子であれば、カラー構成単位毎
に、３種類の電圧補正回路を用いてもよい。また、Ｖ−
Ｔ特性の補正も、電圧補正回路２１Ａ，２１Ｂに限定さ
れるものでなく、入力信号に対する輝度特性が２種類以
上得られればよく、パソコン用や、Ａ／Ｄ変換の施され
たビデオ信号等のディジタル信号に対してはＲＯＭテー
ブルを用いることも可能である。Although the voltage correction circuits 21A and 21B are of two types, two or more types of voltage correction circuits may be used. For example, in the case of a liquid crystal display element in which RGB color filters are arranged in the vertical or horizontal direction, three types of voltage correction circuits may be used for each color constituent unit. Also, V-
The correction of the T characteristic is not limited to the voltage correction circuits 21A and 21B as long as two or more types of luminance characteristics with respect to the input signal can be obtained, such as for a personal computer or a video signal subjected to A / D conversion. It is also possible to use a ROM table for digital signals.
【００１８】なお、上記実施の形態において、表示信号
をビデオ信号としたが、ビデオ信号に限定されるもので
はなく、パソコン等のディジタルデータでも良い。In the above embodiment, the display signal is a video signal, but the display signal is not limited to a video signal and may be digital data of a personal computer or the like.
【００１９】[0019]
【発明の効果】以上説明したようにこの発明によれば、
同一レベルの入力信号に対して異なる印加電圧に変換す
る複数の変換方法により生成した複数の印加電圧を、画
素に選択的に印加することにより、複数の変換方法の特
性が視覚的に合成されるため、黒つぶれ現象や反転現象
等の階調表示の悪化を低減し、液晶表示素子が大画面パ
ネルであっても視覚特性を改善することができる。ま
た、液晶表示素子の構成を変えることなしに視角特性を
改善でき、特に「暗」表示域での反転現象の低減が可能
となるため、表示内容等用途により視角特性や解像度を
要求が異なる液晶表示装置に、同一の特性，構成の液晶
表示素子を用いることが可能となり、その実用的効果は
大きい。As described above, according to the present invention,
By selectively applying a plurality of applied voltages generated by a plurality of conversion methods for converting input signals of the same level to different applied voltages to pixels, the characteristics of the plurality of conversion methods are visually combined. Therefore, it is possible to reduce deterioration of gradation display such as a blackout phenomenon and an inversion phenomenon, and to improve visual characteristics even when the liquid crystal display element is a large screen panel. In addition, the viewing angle characteristics can be improved without changing the configuration of the liquid crystal display element, and in particular, the inversion phenomenon can be reduced in the "dark" display area. A liquid crystal display element having the same characteristics and configuration can be used for the display device, and the practical effect thereof is great.
【図１】この発明の実施の形態の液晶表示装置の構成
図。FIG. 1 is a configuration diagram of a liquid crystal display device according to an embodiment of the present invention.
【図２】この発明の実施の形態における電圧補正回路の
入出力特性図。FIG. 2 is an input / output characteristic diagram of the voltage correction circuit according to the embodiment of the present invention.
【図３】この発明の実施の形態の液晶表示装置の入力の
ビデオ信号に対する輝度を示す図。FIG. 3 is a diagram showing luminance with respect to an input video signal of the liquid crystal display device according to the embodiment of the present invention.
【図４】この発明の実施の形態において所定の画素毎に
異なる電圧補正回路を選択するパターン例を示す図。FIG. 4 is a diagram showing a pattern example for selecting a different voltage correction circuit for each predetermined pixel in the embodiment of the present invention.
【図５】従来の液晶表示装置の構成図。FIG. 5 is a configuration diagram of a conventional liquid crystal display device.
【図６】従来例における液晶表示素子のＶ−Ｔ特性図。FIG. 6 is a VT characteristic diagram of a liquid crystal display element in a conventional example.
１０ 増幅回路 ２１Ａ，２１Ｂ 電圧補正回路 ３１ 駆動電圧回路 ４１ タイミング発生回路 １００ 液晶表示素子 １１０ データバスドライバ １２０ スキャンバスドライバ 10 amplifier circuits 21A and 21B voltage correction circuit 31 drive voltage circuit 41 timing generation circuit 100 liquid crystal display element 110 data bus driver 120 scan canvas driver
Claims (3)
対する輝度の関係が非線形な液晶表示素子を駆動する液
晶表示装置の駆動方法であって、 同一レベルの入力信号に対して異なる印加電圧に変換す
る複数の変換方法により生成した複数の印加電圧を、前
記画素に選択的に印加することを特徴とする液晶表示装
置の駆動方法。1. A driving method of a liquid crystal display device, wherein pixels are arranged in a matrix form and a liquid crystal display element having a non-linear relationship of luminance with respect to an applied voltage is driven, the input signal having the same level is converted into different applied voltages. A method for driving a liquid crystal display device, wherein a plurality of applied voltages generated by a plurality of conversion methods are selectively applied to the pixels.
置した画素には、同一の変換方法により生成した印加電
圧を印加する請求項１記載の液晶表示装置の駆動方法。2. The method of driving a liquid crystal display device according to claim 1, wherein applied voltages generated by the same conversion method are applied to pixels arranged in the same row or the same column in a matrix.
対する輝度の関係が非線形である液晶表示素子を備えた
液晶表示装置であって、 同一レベルの入力信号に対して異なる印加電圧に変換す
る複数の変換手段と、 この複数の変換手段により変換した複数の印加電圧を前
記画素に選択的に印加するための切換え手段とを設けた
ことを特徴とする液晶表示装置。3. A liquid crystal display device comprising liquid crystal display elements in which pixels are arranged in a matrix and the relationship of luminance with respect to an applied voltage is non-linear, wherein a plurality of applied signals are converted into different applied voltages with respect to an input signal of the same level. And a switching means for selectively applying a plurality of applied voltages converted by the plurality of converting means to the pixels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24756795A JPH0990910A (en) | 1995-09-26 | 1995-09-26 | Liquid crystal display device and drive method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24756795A JPH0990910A (en) | 1995-09-26 | 1995-09-26 | Liquid crystal display device and drive method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0990910A true JPH0990910A (en) | 1997-04-04 |
Family
ID=17165422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24756795A Pending JPH0990910A (en) | 1995-09-26 | 1995-09-26 | Liquid crystal display device and drive method therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0990910A (en) |
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