TWI320163B - Circuit and method of adjusting voltage of liquid crystal display panel - Google Patents

Circuit and method of adjusting voltage of liquid crystal display panel Download PDF

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Publication number
TWI320163B
TWI320163B TW094146343A TW94146343A TWI320163B TW I320163 B TWI320163 B TW I320163B TW 094146343 A TW094146343 A TW 094146343A TW 94146343 A TW94146343 A TW 94146343A TW I320163 B TWI320163 B TW I320163B
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Taiwan
Prior art keywords
voltage
common electrode
input
data voltage
liquid crystal
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TW094146343A
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TW200725532A (en
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Yi Chang Lai
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Priority to TW094146343A priority Critical patent/TWI320163B/zh
Priority to US11/642,153 priority patent/US20070146285A1/en
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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
    • 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
    • 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
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • 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
    • G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

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  • 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)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Description

1320163' ‘九、發明說明： 【發明所屬之技術領域】 - 本發明係關於一種液晶顯示面板電壓調整電路及其電壓調整 ' 方法’尤指一種能使液晶顯示面板閃爍程度達到最佳化之液晶顯 示面板電壓調整電路及其電壓調整方法。 【先前技術】 液晶顯示（Liquid Crystal Display，LCD)面板於組裝過程中，其 上下玻璃基板組合時容易造成液晶盒間隙(Cell Gap)不均勻之現 象，而液晶盒間隙不均勻會導致液晶顯示器部份區域公共電極電 • 壓準位(Optimum)值不同。因此，若部份區域之提供給液晶顯示器 公共電極之電壓始終不變，將會導致液晶顯示器在顯示畫面時造 成部份區域之不同閃爍現象。而調整目前之製程參數及使用目前 之驅動積體電路無法使液晶顯示面板閃爍程度達到最佳化。 一種先前技術使液晶顯示面板達到閃爍程度最佳化之方法係 由人工操作，調整一可變電阻以使整個面板達到最佳之閃爍程 度。小尺寸屏之底座基板可認同爲低電阻接地，外加一普通單通 道機械電位器調節公共電極電壓值進行人工校正。 、惟’該種人工操作方法調節公共電極賴容易增加產線產出時 因為人眼睛有時產生視覺誤差使調整後的液晶顯示面板仍 -獨之_現象’因此無法舰晶_面板_程度達到 攻佳化。 【發明内容】 卜夕H ^述内容，提供一種使液晶顯*面板閃爍程度達到最佳 化之土 曰顯『面板電壓調整電路及其電壓調整方法實為必要。 入滅曰it示面板電壓調整電路’其包括第一輸入端、第二輸 亡電壓調整電路、第一緩衝器、第二緩衝器、第 第」輸:端G輸”查表電路包括最佳閃_壓準位，該 杳表雷技辞本二輸入端分別輸入資料電壓及公共電極電壓給該 一表電路’該查表電路對縣中之最佳閃爍電壓準位將資料電壓 6 1320,163 •及公共電㈣祕輸給電_整電路，料 之資料電壓及蝴剛分別經由第=路::整後 缓衝後提供給第一輸出端及第二輸出端。 n及第一緩衝器之 -種液晶顯示面板龍酸方法，其包括 步驟一：輸入資料電壓及公共電極電壓； =二：對比輸人之資料電壓與最佳閃爍資料電 j二·調整輸人之資料電⑤為最佳_之資料電^ ， V驟四.輸出調整後之資料電壓及未經調整之公丘炻 -種液晶顯示面板電壓調整方法，其包括如下步^塗° 步驟一：輸入資料電壓及公共電極電壓； . 電極電 壓 位步驟二：對比輸人之公共電極電_最佳閃爍公共電極電鱗 •步驟三：將輸入之公共電極電壓調整為最佳閃爍之公共 f5 2出未經調整之資料電壓及調整後之公共電極電壓。 種液BB,·，員示面板電壓調整方法，其包括如下步驟： 步驟一：輸入資料電壓及公共電極電壓；
^驟二：對比輸入之資料電壓與最佳閃爍資料電壓準位 對t輸入之公共電極電壓與最佳閃爍公共電極電壓準位； 步驟三：調整輸入之資料電壓為最佳閃爍之資料電壓 輸入之公共電極電壓調整為最佳閃爍之公共電極電壓； ， 步驟四：輸出調整後之資料電壓及調整後之公共電極電壓。 相較於先前技術，本發明液晶顯示面板電壓整
法可根據輸入之資料電壓及蝴極電壓與查表論路J ^佳閃燥電壓準位啸，將其調整為最佳関之㈣電壓及公此 ，極電壓，因此可使液晶顯示面板閃爍程度達到最佳化。、 【實施方式】 請參閱第一圖，係本發明液晶顯示面板電壓調整電路示意圖。 該液晶顯示面板電壓調整電路100包括第一輸入端1、第二G入端 1320163 .2、查表(Look Up Table)電路3、電壓調整電路4、第一 第二緩衝H 7、第-輸出端8及第二輸出端9。該查表電路3°内部 包巧最佳閃爍，壓準位(Flicker 〇__，該最佳閃爍電 包 括取佳閃爍之資料f壓準位及公共電極電鮮位。該第—輸入端卫 ，第^輸人端2分別輸人資料及公共電極電壓給該 3，=查表電路3對應表巾之最佳_賴準位將需要調整之 電壓及公共電㈣祕輸給·輕電路4 2 ==，資_壓及公共電極電壓分別經由第—電第4 ίί提供給第"輸出端8及第二輸出端9。當資料 電星及公共電極電壓進入查表電路 田戶、竹 ，對應值’藉由電壓調整電路4將需要調乂節“二 電極電壓調整為最佳閃爍值。 電堅及/w、 姓液晶顯示面板_程度不同m輯為例今明次 枓電壓及公共電極電壓之絲與調整過程。 μ例5尤明貝 -5V〜5V中之5Ve該第-及第二區域資料電壓 輝度’當第一區域輸入3V之資料電壓時，其度未ί 巴域之ΐ度，因此根據查表電路3中資料電壓準位，；第- ίΐί；^輝度超過所需要之輝度，因此根據查表電路巧i m準·該第—f域輸人之I料電壓應當調整為4V。 一情況假設第一及第二區域資料電壓 度，當輸人之公共電極電壓均 Ϊ —區域未_所需要之輝度4二輯超職時， 查表電路3中對應公共電極電壓準位值 二 又。根 ⑤t共電極電壓，則經調整後應當提供=2= 電^6V，提供給第二區域公共電極電壓為w。匕域4共電極 第二種情況假設該第一及第二區域資 壓所達到之輝度，«人之公共電極^ 8 1320163' ..時’第-區域未達到所需要之輝度而 度，因此根據查表電路3中資料電壓準& 而要之輝 資料電壓應當調整為2.5V，該第二區妗。一品域輸入3乂之 調整為3.W。根據查表電路3中對3V之資料電壓應當 調節該第-及第二區域公㈣極電’需要 -區域公共電極電壓為5.5V，提供认第提供給第 45V。 代供、，，°第一區域公共電極電壓為 以上所述之第一及第一區域亦可為二閃炸 ^說明之電壓數值以實際液晶顯示面板从及 本發明液’示©板電壓調整電路卿根據輸人之資料電壓及八 共電^電壓之大小，根據查表電路3所對應之最佳閃燦電壓準位 以調王液晶面板輸人之倾電壓及公共雜電壓達 資料電壓及公共電極電壓，從而達到液晶面板最佳之閃燦程 =之 综上所述’本發明符合發明專利要件，爰依法提出專利二 惟，以上所述者僅為本發明之較佳實施方式，本發 ; 以上述實施方式為限’舉凡熟悉本案技藝之人士，在援 明精神所作之等效修錦或變化，皆應包含於以下申請專利範圍内: 【圖式簡單說明】 第一圖係本發明液晶顯示面板電壓調整電路示意圖。 【元件符號說明】 100 第一緩衝器 6 1 第二緩衝器 7 2 第一輸出端 8 3 第二輸出端 9 第一輸入端 第二輸入端 查表電路 電壓調整電路 4 9

Claims (1)

  1. ^20163， 申μ專利範圍： 液ίί示面板電壓調整電路’其包括第-輸人端、第二輸 第一“表電路、電壓調整電路、第一緩衝器、第二緩衝器、 位，第三輸出端，該查表1路包括最佳_電壓準 電壓入端及第二輸入端分別輸入資料電壓及公共電極 將次表電路’該絲1路對絲+之最佳嶋電壓準位 電i將ίΐί公共壓傳輸給電壓調整電路，該電壓調整 整ΐ之f4電壓及公共電極電壓分別經由第-緩衝器 2如由^衝益之緩衝後提供給第—輸出端及第二輸出端。 .申=2範圍第/項所述之液晶顯示面板電翻 =。該__電壓準位包括資料電壓準位及公共電極電壓^ 3. -種液晶顯示面板電壓調整方法，其包括如下 步驟一：輸入資料電壓及公共電極電壓· 對比輸入之資料電壓與最佳閃爍資料電壓準位. 調整輸入之資料電壓為最佳閃爍之資料電壓；， 輸出調整後之資料電壓及未經調整之公共雷坧雷廠 .一種液晶顯示面板電壓調整方法，其包括如下步^: ” 步驟一：輸入資料電壓及公共電極電壓； 步驟二：對比輸入之公共電極電壓與最佳閃塘公共電極 位； ' 步驟二 ’ 步驟三 步驟四 電壓準 步驟三：|輸入之公共電極電壓調整為最佳閃爍之公共電極電 ϋ四：輸出未經調整之資料電壓及調整後之公共電 .種液晶顯示面板電壓調整方法，其包括如下步驟：堅。 步驟一：輸入資料電壓及公共電極電愿； 步驟二：耻輸人之資料電壓與最佳閃爍資料電 ^比輸入之公共電極電壓與最佳卩猶公共電極電^ 1320163
    步驟三：調整輸入之資料電壓為最佳閃爍之資料電壓，同時將 輸入之公共電極電壓調整為最佳閃爍之公共電極電 壓； 步驟四：輸出調整後之資料電壓及調整後之公共電極電壓。 11
TW094146343A 2005-12-23 2005-12-23 Circuit and method of adjusting voltage of liquid crystal display panel TWI320163B (en)

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US11/642,153 US20070146285A1 (en) 2005-12-23 2006-12-20 Voltage adjusting circuit and method of liquid crystal display panel

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CN103137082B (zh) * 2011-11-25 2015-03-18 冠捷投资有限公司 液晶显示设备及其共同极电压相关数据核对方法
CN104536604A (zh) * 2014-12-22 2015-04-22 深圳市华星光电技术有限公司 触控显示面板及触控显示装置
CN112885280A (zh) * 2021-01-22 2021-06-01 重庆惠科金渝光电科技有限公司 一种显示装置的驱动方法、装置、显示设备及存储介质

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CN100446079C (zh) * 2004-12-15 2008-12-24 日本电气株式会社 液晶显示装置、其驱动方法及其驱动电路
KR101136318B1 (ko) * 2005-04-29 2012-04-19 엘지디스플레이 주식회사 액정표시장치

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