TW200949816A - A method of generating a frame start pulse signal in a source driver chip of a liquid crystal display - Google Patents
A method of generating a frame start pulse signal in a source driver chip of a liquid crystal display Download PDFInfo
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- TW200949816A TW200949816A TW098109925A TW98109925A TW200949816A TW 200949816 A TW200949816 A TW 200949816A TW 098109925 A TW098109925 A TW 098109925A TW 98109925 A TW98109925 A TW 98109925A TW 200949816 A TW200949816 A TW 200949816A
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- frame start
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 19
- 230000000630 rising effect Effects 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 claims description 6
- 230000001939 inductive effect Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 2
- 238000007796 conventional method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 239000013078 crystal Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
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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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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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
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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
- G09G2310/00—Command of the display device
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
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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
- G09G2370/00—Aspects of data communication
- G09G2370/14—Use of low voltage differential signaling [LVDS] for display data communication
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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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Description
200949816 六、發明說明: 【發明所屬之技術領域】 曰本。發明涉及一種驅動液晶顯示器的方法,尤其涉及一種在浪 :ϋ之源極驅鮮晶片内產生引發驅動源極驅動騎特殊功 月b的框起始脈衝信號之方法。 【先前技術】 顯示(LCD)器中’液晶可藉由根據輸人電壓而改變 液曰曰刀f的配向來傳輸光線,如此影像資料就可以被顯示出來。 ❹得到而中,薄膜電晶體(tft)液晶顯示器已鐵
而積極地使用,該㈣職晶贿晶顯示技利用製造 石夕積體電路的技術來製造的。 疋· W 第1圖為顯示普通液晶顯示器的面板驅動系統。 彩色的面板驅動系統包括:由液晶、 tl ti l ^ 和所構成並用以驅動它們的閘極驅動器單元40 ·由源 以:ί^1 極2=13所 並用以驅動源極的源極驅動單元20; 時2G錄請素資料的 。趙的=:==晶?2和:===,晶 22、IS頻該等源極卿2卜 通常,時序控制器10接跄w俏啻厭i A, 200949816 在將電晶體-電晶體-邏輯(TTL)用於讓時序控制器傳送資料 至驅動器積體電路(1C)的傳統方式中,存在傳送率低、電流 耗高以及電磁介面(EMI)特性弱的問題。該LVDS方式萨2補 償TTL方式的問題來大幅減小信號電壓擺幅大小。 除此之外,mLVDS方式大大地降低了電流消耗並藉由進一步 減小電壓擺幅大小來提高整個晶片的EMi特性。在LVDS和 mLVDS方式中的資料傳送對於熟悉液晶顯示器領域的技術人員 而言是眾所周知地,並因此省略對其的詳細描述。 第2圖為顯示了使用傳統mLVDS方式來識別在液晶顯示器 的重設信號的時序圖。 ❹ 在使用傳統mLVDS方式的液晶顯示器中,該重設信號係藉由 下,過程別。首先,在負載信號L〇AD處於高狀態被輸入的 狀態下,信號LVO+,-為以mLVDS方式被傳送的輸入資料信號, 並在低狀態下維持200ns或以上(t2)。在這之後,該等信號在高 狀態下維持三個或更多時脈(CLKs) (t3)。 ^ 〇其次,在時脈信號CLK+,-的上升邊緣處被觸發的輸入資料信 號i^V0+,-的第一低信號RST=L被識別為該重設信號。該時序控 制器將用以驅動源極驅動器的特殊功能的框起始脈衝信號傳至一 源極驅動器。 在使用傳統mLVDS方式的液晶顯示器中,由於需要驅動源極 ❹ 驅動器的特殊功能的框起始脈衝信號被由外部的時序控制器輸 入’所以這裡存在的問題就是額外需要用以將框起始脈衝信號輸 入至源極驅動器晶片内的輸入接腳,以及在安裝有源極驅動器的 印刷電路板内額外需要有用以輸入框起始脈衝信號的輸入線。 【發明内容】 《所欲解決之技術問題》 本發明提供了一種在本發明的液晶顯示器的源極驅動器晶片 内產生一框起始脈衝信號的方法’藉由產生一框起始脈衝信號用 以引,一驅動源極驅動器的特殊功能’因此可減少用以輸入框起 始脈衝k號的輸入接腳數量,並可移除用以在印刷電路板内安裝 5 200949816 源,裝中ί》入框起始脈衝信號的輪入線。 根據本發明的一個方面,蔣视女 ^ L 動器晶片内產生用以引發驅動源在液晶顯示器的f、極驅 衝信號的方法,包含:一負載信號啟特 以指定一新重設信號的一扭私&鄉级動貝戰L现用 資料輸入信號中被用來作為:重設識別2=驟資= Ξ個號在該重設低維持步驟後在4狀態下維持 ο 高狀g維資料輸入信號㈣在 極驅動器晶片内。預疋時脈’則框起始脈衝信號產生於源 【實施方式】 、祕ΐ晶顯示器的源極驅動11日日日制產生引發驅動 框起始脈衝信號來去除輸入框起始脈衝 ^後,本發明將參考所附圖式進行詳細描述。 本發,用以產生—框起始脈衝信號的時序圖。 200ns或更夕的打間(t2)。這裡,負载作號L〇AD定義 凡 二在那之後,該等信號在i狀態下維持了三個‘ 的^細言號的t 週期⑹被維持三個或更多個時脈,該時脈信號CLK+漫用^= 6 200949816 一起始脈衝信號的一限制信號。 意味著,當資料輸入信號LV0+,-被當作重設識別輸入信號輸 入使用時,則藉由使用在該信號“RST=L”輸入之前維持了三個或 更多個時脈的重設高週期(t3)來確定產生起始脈衝偉號。 第4圖為顯示本發明實施例中確定框起始脈衝信號產生的方 法的時序圖。 如第4圖所示,如果在時脈信號CLK+,-的上升邊緣被檢測到 六個或更多個的“RST=H”,而在該六個或更多個的“RST=H”中該 被用作重設識別輸入信號的資料輸入信號LV0+,-在重設高狀態 下維持了三個或更多個CLKs,則該框起始脈衝信號產生於源極 〇 驅動器晶片内。如果在時脈信號CLK+,-的上升邊緣檢測到五個或 更少個的“RST=H”的話,則不產生框起始脈衝信號。 第4圖所示的實施例是在源極驅動器晶片内產生框起始脈衝 信號的方法的例子。因此,“RST=H”週期的各種變換可以被用作 在源極驅動器晶片内產生框起始脈衝信號的限制信號。 意味著’該時脈信號CLK+,-的下降邊緣可被用來檢測 “RST=H”的週期。除此之外,亦可使用時脈信號CLK+,-的雙邊緣。 第5圖為由其他資料輸入信號輸入一“RST=H”之識別信號的 時序圖。 根據本發明中液晶顯示器的源極驅動器晶片内所產生的框起 ® 始脈衝信號的方法’可以理解地是,除了複數個資料輸入信號中 的該信號LV0+,·之外,其他資料輸入信號LV1+,-至LV5+,-中的 任意資料輸入信號可被選擇為“RST=H”的一限制信號。 【表1】 根據SB信號的微型低電壓差分信號(Mini_LVDS)匯流排導退 作用 接腳名稱 SB="L" SB=”H” LV0A LV0+ ' LV5- 200949816 LV0B LV0- LV5+ LV1A LV1+ LV4- LV1B LV1- LV4+ LV2A LV2+ LV3- LV2B LV2- LV3+ CLKA CLK+ CLK- CLKB CLK- CLK+ LV3A LV3+ LV2- LV3B LV3- LV2+ LV4A LV4+ LV1- LV4B LV4- LV1+ LY5A LV5+ LV0- LV5B LV5- LV0+ 表1顯示出信號LV0+,-的位置和相位,即,根據mLVDS介 q 面内的SB信號狀態而改變的一重設識別輸入信號。參考表1 ’ 可以暸解地是複數個資料輸入信號LV0至LV5被用作經反轉成 為輸入的重設識別輸入信號。 當信號LV0+,-和相位根據下面SB信號條件而改變時,重設 信號被輸入。也就是,在SB=L的情況下,信號LV0A被輸入為 LV0+,而信號LV0B被輸入為LV0-。因此,LV0+被輸入至接腳 LVxA。當SB=H的情況下,信號LV5A被輸入為LV0-,而信號 LV5B被輸入為LV0+。因此,LV0+被輸入至接腳LVxB。 在這個方式下,信號LV0+的輸入位置和相位係根據SB信號 的條件而改變為輸入。 在SB=L和SB=H的情況下,輸入重設信號如下。在負載信 8 200949816 號LOAD的上升邊緣之後’該信號LV0+在低狀態LowJ)下維持 了 200ns,以及之後在高狀態下維持了三個或更多個時脈。在第 一個接著的輸入時脈信號CLK的上升邊緣處所檢測到的信號 “RST=L”被用作重設信號。 意味著’在SB=H的情況下,由於輸入重設信號為 LV5B=LV0+,且有鑑於源極驅動器晶片的輸入,則將該重設信號 的相位反轉後輸入。 如上所述’在SB=H的情況下,儘管具有一相反相位的重設 仏號可被輸入至一輸入接腳,但該相位仍再一次在源極驅動器晶 片内被反轉。因此,考慮到源極驅動器晶片的内側,可利用盥 ❹ SB=L情況下相同的相位。 ^ 根據本發明中在液晶顯示器的一源極驅動器晶片内產生一框 起始脈衝信號的方法,不同於由外部輸入框起始脈衝信號的傳統 方法,而是藉由產生框起始脈衝信號用以在源極驅動器晶片内引 發驅動源極驅動器的特殊功能,其可減少用以輸入框起始脈衝信 ,的輸入接腳數量,並可移除用以在印刷電路板内安裝源極驅動 器晶片的過程中輸入框起始脈衝信號的輸入線。 除此之外,由於用以處理特殊框或水平線的影像資料的信號 產生於源極驅動器晶片内’則可以簡單地完成内部邏輯。 ❹ ,當描述與本發明有關示範實施例時,很明顯的是在此領域的 技術人對本發明所做的任何修改及變動都無法脫離本發明的精 神與範圍。 【圖式簡單說明】 所附圖式其中提供關於本發明實施例的進一步理解並且結合 與構成本說明書的-部份’說明本發明的實關並且描述一同提 供對於本發明實施例之原則的解釋。 第1麵不普通减顯示輯面板驅動系統; 第2圖為顯示了使用傳統齓伽方式來識別在液晶顯示器内的重 200949816 設信號的時序圖; ί m本發训以纽—框起絲衝錢的時序圖; 弟圖為顯示本發明實施例中確定框起始脈衝信號產生的方法的 時序圖;以及 第5圖為由其他資料輸入信號輸入一“RST=H”之識別信號的時序 圖。 【主要元件符號說明】 10 時序控制器 20 源極驅動單元 〇 2卜22、23源極驅動器 30 面板 40 閘極驅動器單元 41、42、43閘極驅動器 CLK+ 時脈信號 CLK- 時脈信號 LOAD負載信號 LOAD1負載信號 LV0+、LV1+〜LV5+資料輸入信號 LV0-、LV1-〜LV5- 資料輸入信號 〇 RST信號
Claims (1)
- 200949816 七、申請專利範圍: 1. 一種在液晶顯示器之源極驅動器晶片内產生引發驅動 驅動器的特殊功能的框起始脈衝信號之方法,包括: ’、 〇 一負載信號啟動步驟,啟動一負載信號用以指定一新重設作 號的一起始點; σ ^ 一重设低維持步驟,讓複數個資料輸入信號中被用來作為一 重設識別輸入信號的一資料輸入信號在低狀態時 週期;以及 二重設高維持步驟,讓該資料輸入信號在該重設低維持步 後在尚狀態下維持三個或更多個時脈; ❹ 其中,如果在該重設高維持步驟中的該資料輸入信號在高狀 怠下維,一個或多個預定時脈,則該框起始脈衝信號產生於該源 極驅動器晶片内。 2·依據申請專利範圍第1項所述之方法,其中在該重設高維 持步驟中,如果該資料輸入信號在高狀態下維持六個或更多個時 脈,則該框起始脈衝信號產生於該源極驅動器晶片内。 3. 依據申請專利範圍第1項所述之方法,其中在該重設高維 持步驟中,藉由該時脈信號的上升邊緣或下降邊緣來檢測該資料 輸入信號是否維持在高狀態下。 4. 依據申請專利範圍第1項所述之方法,其中在該重設高維 持步驟中,藉由該時脈信號的上升邊緣以及下降邊緣來檢 料輸入信號是否維持在高狀態下。 > 5·依據申請專利範圍第i項所述之方法,其中該框起始脈衝 信號係一用來處理一特殊框或一該液晶顯示器面板的特殊水平線 的影像資料的信號。 、6.依據申請專利範圍第1項至第5項任一項所述之方法,其 中被用於該重設識別輸入信號的複數個該資料輸入信號被反轉為 輸入。 11 200949816 四、指定代表圖: (一) 本案指定代表圖為:第(3 )圖。 (二) 本代表圖之元件符號簡單說明: CLK+ 時脈信號 CLK- 時脈信號 LOAD負載信號 LOAD1負載信號 LV0+、LV1+〜LV5+資料輸入信號 LV0-、LV1·〜LV5- 資料輸入信號 RST 信號 ❹ ❹ 五、本案若有化學式時,請揭示最能顯示發明特徵的化學 式: 無 3
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| KR0156804B1 (ko) * | 1995-11-28 | 1998-12-15 | 김광호 | 데이타 인에이블 신호를 이용하여 바이오스에 관계없이 프리챠지를 하는 스타트 펄스 버티컬 신호 생성기 |
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| JP4248045B2 (ja) | 1997-04-18 | 2009-04-02 | シャープ株式会社 | 液晶表示パネル用コントローラ及び制御方法並びに液晶表示装置 |
| KR100507272B1 (ko) * | 1999-12-29 | 2005-08-10 | 비오이 하이디스 테크놀로지 주식회사 | 박막트랜지스터 액정표시 장치의 스타트 펄스신호 발생 회로 |
| JP4117134B2 (ja) | 2002-02-01 | 2008-07-16 | シャープ株式会社 | 液晶表示装置 |
| KR20040009815A (ko) * | 2002-07-26 | 2004-01-31 | 삼성전자주식회사 | 액정 표시 장치 및 그 구동 방법 |
| KR101090248B1 (ko) | 2004-05-06 | 2011-12-06 | 삼성전자주식회사 | 칼럼 드라이버 및 이를 갖는 평판 표시 장치 |
| JP2006078662A (ja) | 2004-09-08 | 2006-03-23 | Casio Comput Co Ltd | 表示駆動装置及び表示装置 |
| KR100712553B1 (ko) * | 2006-02-22 | 2007-05-02 | 삼성전자주식회사 | 프레임 주파수에 따라 슬루율이 조절되는 소스 드라이버회로 및 소스 드라이버 회로에서 프레임 주파수에 따른슬루율 조절 방법 |
| JP2007253694A (ja) | 2006-03-22 | 2007-10-04 | Mitsubishi Fuso Truck & Bus Corp | 自動車のランプ装置 |
| KR101258900B1 (ko) * | 2006-06-30 | 2013-04-29 | 엘지디스플레이 주식회사 | 액정표시장치 및 데이터 구동회로 |
| JP2009169111A (ja) * | 2008-01-16 | 2009-07-30 | Sharp Corp | 表示駆動回路、表示装置及び表示駆動方法 |
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| KR100911848B1 (ko) | 2009-08-11 |
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