JP5280649B2 - Lcdパネル駆動回路 - Google Patents
Lcdパネル駆動回路 Download PDFInfo
- Publication number
- JP5280649B2 JP5280649B2 JP2007158883A JP2007158883A JP5280649B2 JP 5280649 B2 JP5280649 B2 JP 5280649B2 JP 2007158883 A JP2007158883 A JP 2007158883A JP 2007158883 A JP2007158883 A JP 2007158883A JP 5280649 B2 JP5280649 B2 JP 5280649B2
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- JP
- Japan
- Prior art keywords
- gradation
- lcd panel
- signal lines
- signal line
- connection point
- 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.)
- Expired - Fee Related
Links
- 239000004973 liquid crystal related substance Substances 0.000 description 16
- 239000003990 capacitor Substances 0.000 description 9
- 230000010354 integration Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 3
- 101100152304 Caenorhabditis elegans tap-1 gene Proteins 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0223—Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
Description
<第1の実施例>
図3は、第1の実施例を示し、本発明によるLCDパネル駆動回路の概略を示している。LCDパネル駆動回路100は、LCDパネル200に接続されるべき960CH分の960個のソースラインs1〜s960と、デジタルアナログ変換機能を担うDAC20と、液晶容量への書き込み機能を担う集合アンプ部10とを含む。ソースラインs1〜s960は横方向に並列に設けられている。
<第2の実施例>
図8は、第2の実施例を示し、集合アンプ部に帰還電位を取り込むための帰還信号ラインの配置が示されている。LCDパネル駆動回路100は、第1の実施例におけると同様に、64個の階調信号の各々を階調信号ラインk1〜k64の各々に対応して出力する集合アンプ部10と、960CH分のソースラインs1〜s960の各々に備えられる960個の階調選択スイッチ部da1〜da960を含むDAC20とから構成される。
20 DAC
21 供給部位
22 中心部位
23 遠端部位
91 差動入力段
92 PMOSトランジスタ
93 NMOSトランジスタ
94 接続点
100 LCDパネル駆動回路
200 LCDパネル
300 走査回路
a1〜a64 駆動アンプ
da1〜da960 階調選択スイッチ部
f1〜f64 帰還信号ライン
G1〜G240 ゲートライン
k1〜k64 階調信号ライン
K1〜K64 供給信号ライン
s1〜s960 ソースライン
tap1〜tap64 書き込み電位
Claims (4)
- LCDパネルに接続されるべき複数のソースラインと、階調レベル毎に設けられて各々が差動入力端子の一方に入力される書き込み電位に応じた階調信号を生成する複数の差動駆動アンプと、前記階調レベル毎に縦方向に並列に設けられて各々が横方向に伸張する複数の階調信号ラインと、前記ソースライン毎に設けられて各々が前記階調信号ラインの何れかを当該ソースラインに選択的に接続する複数の階調選択スイッチ部と、を含むLCDパネル駆動回路であって、
前記差動駆動アンプ毎に設けられ、各々が前記階調信号ラインの横方向の一方側に位置する第1接続点で前記階調信号ラインに接続されることで前記第1接続点を介して当該差動駆動アンプが生成する階調信号を前記階調信号ラインに供給する複数の供給信号ラインと、
前記差動駆動アンプ毎に設けられ、各々が前記階調信号ラインの横方向の他方側に位置する第2接続点で前記階調信号ラインに接続され、前記第2接続点の電位を当該差動駆動アンプの差動入力端子の他方に入力する複数の帰還信号ラインと、
を含むことを特徴とするLCDパネル駆動回路。 - 前記第2接続点は前記階調信号ラインの横方向の他方側における遠端部位に位置することを特徴とする請求項1記載のLCDパネル駆動回路。
- 前記第2接続点は前記階調信号ラインの一方側及び他方側の略中間に位置することを特徴とする請求項1記載のLCDパネル駆動回路。
- 前記LCDパネルは、QVGA規格以上の高精細パネルであることを特徴とする請求項1記載のLCDパネル駆動回路。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007158883A JP5280649B2 (ja) | 2007-06-15 | 2007-06-15 | Lcdパネル駆動回路 |
US12/134,396 US20080309685A1 (en) | 2007-06-15 | 2008-06-06 | Lcd panel driving circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007158883A JP5280649B2 (ja) | 2007-06-15 | 2007-06-15 | Lcdパネル駆動回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008310141A JP2008310141A (ja) | 2008-12-25 |
JP5280649B2 true JP5280649B2 (ja) | 2013-09-04 |
Family
ID=40131858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007158883A Expired - Fee Related JP5280649B2 (ja) | 2007-06-15 | 2007-06-15 | Lcdパネル駆動回路 |
Country Status (2)
Country | Link |
---|---|
US (1) | US20080309685A1 (ja) |
JP (1) | JP5280649B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9097353B2 (en) | 2007-10-19 | 2015-08-04 | Trw Automotive Electronics & Components Gmbh | Ventilation device |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05224621A (ja) * | 1992-02-14 | 1993-09-03 | Toshiba Corp | 液晶パネル駆動電源用半導体装置 |
JPH06180564A (ja) * | 1992-05-14 | 1994-06-28 | Toshiba Corp | 液晶表示装置 |
JP3235893B2 (ja) * | 1993-01-28 | 2001-12-04 | 京セラ株式会社 | 液晶表示装置の駆動回路 |
TW429393B (en) * | 1997-11-27 | 2001-04-11 | Semiconductor Energy Lab | D/A conversion circuit and semiconductor device |
JP2002072969A (ja) * | 2000-08-25 | 2002-03-12 | Hitachi Ltd | 液晶駆動回路及び液晶表示装置 |
JP4757388B2 (ja) * | 2001-01-15 | 2011-08-24 | 株式会社 日立ディスプレイズ | 画像表示装置およびその駆動方法 |
JP4437378B2 (ja) * | 2001-06-07 | 2010-03-24 | 株式会社日立製作所 | 液晶駆動装置 |
JP3942595B2 (ja) * | 2004-01-13 | 2007-07-11 | 沖電気工業株式会社 | 液晶パネルの駆動回路 |
EP1720149A3 (en) * | 2005-05-02 | 2007-06-27 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
-
2007
- 2007-06-15 JP JP2007158883A patent/JP5280649B2/ja not_active Expired - Fee Related
-
2008
- 2008-06-06 US US12/134,396 patent/US20080309685A1/en not_active Abandoned
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9097353B2 (en) | 2007-10-19 | 2015-08-04 | Trw Automotive Electronics & Components Gmbh | Ventilation device |
Also Published As
Publication number | Publication date |
---|---|
US20080309685A1 (en) | 2008-12-18 |
JP2008310141A (ja) | 2008-12-25 |
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