JP2000137467A5 - - Google Patents
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- JP2000137467A5 JP2000137467A5 JP1998313608A JP31360898A JP2000137467A5 JP 2000137467 A5 JP2000137467 A5 JP 2000137467A5 JP 1998313608 A JP1998313608 A JP 1998313608A JP 31360898 A JP31360898 A JP 31360898A JP 2000137467 A5 JP2000137467 A5 JP 2000137467A5
- Authority
- JP
- Japan
- Prior art keywords
- line
- voltage
- gradation
- signal line
- row
- 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.)
- Pending
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- 239000000428 dust Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Description
【００１８】
【発明が解決しようとする課題】
上記したように、従来の信号線ドライバでは、各列（たとえばｊ列）において１ライン毎に入力画像データＤの値に応じて正極性階調電圧Ｖ0〜Ｖｋ-1の中のいずれか１つ（Ｖｊ）または負極性階調電圧Ｖ’O〜Ｖ’ｋ-1の中のいずれか１つ（Ｖ’ｊ）が選択され、画素駆動期間ＴHの全時間を通じてこの選択された階調電圧Ｖｊ（Ｖ’ｊ）により各信号線Ｘｊが駆動される。その際、画素駆動期間ＴHの開始直後においては、信号線Ｘｊ上で充電電流または放電電流が流れることによって、電圧の極性が反転する。
0018
[Problems to be Solved by the Invention]
As described above, in the conventional signal line driver, one of the positive gradation voltages V0 to Vk-1 is used for each line in each row (for example, row j) according to the value of the input image data D. (Vj) or one of the negative gradation voltages V'O to V'k-1 (V'j) is selected, and the selected gradation voltage Vj is selected throughout the pixel drive period TH. Each signal line Xj is driven by (V'j). At that time, immediately after the start of the pixel drive period TH, the polarity of the voltage is reversed due to the flow of the charge current or the discharge current on the signal line Xj.
このため、たとえば薄膜トランジスタＴＦＴのソース線あるいはドレイン線上に塵埃等が付着して階調電圧書き込みの電流経路が高抵抗になっていると、チャージまたはディスチャージ速度の遅れが顕著になり、図２１の破線Ｌ’で示すように当該画素において最終書き込み電圧が所望のレベルに達しなかったり、そこまで至らなくても破線Ｌで示すように実効電圧が不足し、所望の階調表示ができなくなることがあった。 Therefore, for example, if dust or the like adheres to the source line or drain line of the thin film transistor TFT and the current path for writing the gradation voltage becomes high resistance, the delay in the charge or discharge speed becomes remarkable, and the broken line in FIG. 21 As shown by L', the final write voltage may not reach the desired level in the pixel, or even if it does not reach that level, the effective voltage may be insufficient as shown by the broken line L, and the desired gradation display may not be possible. It was.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31360898A JP2000137467A (en) | 1998-11-04 | 1998-11-04 | Signal line driving circuit for liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31360898A JP2000137467A (en) | 1998-11-04 | 1998-11-04 | Signal line driving circuit for liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000137467A JP2000137467A (en) | 2000-05-16 |
| JP2000137467A5 true JP2000137467A5 (en) | 2005-11-17 |
Family
ID=18043377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31360898A Pending JP2000137467A (en) | 1998-11-04 | 1998-11-04 | Signal line driving circuit for liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000137467A (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6750835B2 (en) | 1999-12-27 | 2004-06-15 | Semiconductor Energy Laboratory Co., Ltd. | Image display device and driving method thereof |
| JP3832627B2 (en) | 2000-08-10 | 2006-10-11 | シャープ株式会社 | Signal line driving circuit, image display device, and portable device |
| JP4415467B2 (en) * | 2000-09-06 | 2010-02-17 | 株式会社日立製作所 | Image display device |
| KR100694475B1 (en) * | 2001-06-30 | 2007-03-12 | 매그나칩 반도체 유한회사 | Source Driver in LCD |
| JP3926651B2 (en) * | 2002-01-21 | 2007-06-06 | シャープ株式会社 | Display drive device and display device using the same |
| JP2005181763A (en) * | 2003-12-19 | 2005-07-07 | Matsushita Electric Ind Co Ltd | Liquid crystal driving device |
| KR101017366B1 (en) * | 2004-08-30 | 2011-02-28 | 삼성전자주식회사 | Liquid crystal display device and method for determining gray level of dynamic capacitance compensation of the same and rectifying gamma of the same |
| JP2006195019A (en) * | 2005-01-12 | 2006-07-27 | Sharp Corp | Liquid crystal display apparatus, and driving circuit and driving method therefor |
| TWI413957B (en) * | 2005-03-01 | 2013-11-01 | Innolux Corp | Active matrix array device |
| JP2006276114A (en) * | 2005-03-28 | 2006-10-12 | Sanyo Epson Imaging Devices Corp | Liquid crystal display device |
| JP4528748B2 (en) | 2006-07-20 | 2010-08-18 | Ｏｋｉセミコンダクタ株式会社 | Driving circuit |
| JP4528759B2 (en) * | 2006-11-22 | 2010-08-18 | Ｏｋｉセミコンダクタ株式会社 | Driving circuit |
| JP5098619B2 (en) * | 2007-12-12 | 2012-12-12 | カシオ計算機株式会社 | Display driving device and display device including the same |
-
1998
- 1998-11-04 JP JP31360898A patent/JP2000137467A/en active Pending
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