200948048 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種影像修正電路及包含此影像修正 電路的顯示裝置，特別是指一種以伽瑪參考電壓進行校正 的影像修正電路及包含此影像修正電路的顯示裝置。 【先前技術】 一般顯不裝置的輸入信號強度與輸出信號強度呈非線 性相關，所以需透過伽瑪（Gamma)曲線來對應調整，以使意 度灰階變化更為接近人眼對光強度的反應，得到比較理= 的晝面對比表現。 “ 參閱圖1，習知一種顯示裝置，包含一參考電壓產生器 72、一背光模組73 1、一顯示面板73、一時序控制器74、 一掃描驅動器75及一資料驅動器71。 該參考電壓產生器72存有複數個參考電壓，並依據使 用者的設定提供不同亮度灰階的參考電壓給該資料驅動器 71。該背光模組731包括一背光驅動器76，該背光驅動器 76依據使用者的設定，產生一背光控制信號並傳送到該顯 示面板7 3。 該顯示面板73包括個呈矩陣排列的書素單元 732、N條掃描線Ls(l)、LS(2)."LS(N)及Μ條資料線Ld⑴ 、LD(2)...LD(M)。而該顯示面板73受該背光控制信號控制 以調整背光源亮度。該等掃描線與該等資料線相互交錯， 且該等畫素單元732分別位於該等掃描線與該等資料線的 交會處。 200948048 驅動控制器74輸出-時序控制信號，來聪動該掃描 及該資料驅動器71。該掃描驅動器75對每一掃 =⑴、LS⑺...Ls(N)輸出—掃描信號。且該掃描驅動器 又該時序控制信號驅動，而逐__致能該等掃描信號。BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an image correction circuit and a display device including the image correction circuit, and more particularly to an image correction circuit for correcting with a gamma reference voltage and including the same A display device for an image correction circuit. [Prior Art] The input signal strength of the general display device is nonlinearly related to the output signal strength, so it is necessary to adjust the gamma curve to make the grayscale change closer to the human eye. The reaction is compared to the performance of the 昼 face. Referring to FIG. 1, a display device includes a reference voltage generator 72, a backlight module 73 1 , a display panel 73 , a timing controller 74 , a scan driver 75 , and a data driver 71 . The generator 72 stores a plurality of reference voltages, and provides reference voltages of different brightness gray scales to the data driver 71 according to user settings. The backlight module 731 includes a backlight driver 76, and the backlight driver 76 is set according to a user. A backlight control signal is generated and transmitted to the display panel 73. The display panel 73 includes a matrix unit 732 arranged in a matrix, N scanning lines Ls(l), LS(2)."LS(N) And the data line Ld(1), LD(2)...LD(M), and the display panel 73 is controlled by the backlight control signal to adjust the brightness of the backlight. The scan lines are interlaced with the data lines, and the The equal pixel units 732 are respectively located at the intersection of the scan lines and the data lines. 200948048 The drive controller 74 outputs a timing control signal to intelligently scan the scan and the data driver 71. The scan driver 75 is for each scan = (1), LS ... Ls (N) output - and a scanning signal to the scanning driver should the drive timing control signal, and by enabling the plurality of scanning signal __.
”該資料驅動11 71接H彡像資料及來自財考電壓產 生器72的該等參考電壓’並依據料參考電壓修正該影像 資料的&度灰?皆值。當該掃描線“⑷的掃描信號被致能時 該資料驅動器71受該時序控制信號驅動，將修正後之影 像資料傳送到第n列的相關畫素單元”2，其中”勻』。 翫头顯示裝置必須透過使用者的設定以提供參考電壓 ^調整明暗對比，並藉由該背光驅動器％產生的背光控制 :口號來决疋背光源的亮纟。由於無法依據該影像資料隨時 :整更換參专電壓’造成該顯示面板73所呈現出的影像内 谷產生對比不佳的現象。再者，不能隨該影像資料即時改 變該背光控制信號，除了導致不合宜的影像亮度，更增加 了背光源的耗電量。 【發明内容】 b 本發明之目的，即在提供一種可以自動調整伽 瑪參考電壓與背光源亮度的影像修正電路及包含此影像修 正電路的顯示裝置。 於是’本發明顯示裝置適用於接收一影像資料，包含 _資料驅動器’接收該影像資料；一顯示面板，電連接 4貝料驅動器；一影像修正電路，包括一感測處理器及一 控制處理器，該感測處理器依據該資料驅動器的消耗電流 200948048 資料’統計該影像資料的整體亮度分布，該控制處理 ^該統相果’並據以產生—背光控制信號；及-背光模 ，又該背光控制信號控制來調整該顯示面板的背光源亮 ❹"The data drives 11 71 to receive the H-picture data and the reference voltage from the financial test voltage generator 72' and corrects the & gray value of the image data according to the material reference voltage. When the scan line "(4) When the scan signal is enabled, the data driver 71 is driven by the timing control signal to transmit the corrected image data to the relevant pixel unit "2" of the nth column, wherein "the uniform". The head display device must provide a reference voltage through the user's setting to adjust the brightness and dark contrast, and the backlight control by the backlight driver %: slogan to determine the brightness of the backlight. Since it is impossible to replace the reference voltage at any time according to the image data, the image in the display panel 73 has a poor contrast. Moreover, the backlight control signal cannot be changed instantaneously with the image data, which not only causes an unfavorable image brightness, but also increases the power consumption of the backlight. SUMMARY OF THE INVENTION It is an object of the present invention to provide an image correcting circuit that can automatically adjust a gamma reference voltage and a backlight brightness, and a display device including the image correcting circuit. Thus, the display device of the present invention is adapted to receive an image data, comprising: a data driver to receive the image data; a display panel electrically connecting the four material feeders; and an image correction circuit comprising a sensing processor and a control processor The sensing processor calculates the overall brightness distribution of the image data according to the data consumption current of the data driver 200948048, and the control process generates the backlight control signal; and the backlight mode, and Backlight control signal control to adjust the backlight of the display panel
本發明影像修正電路適用於與一接收一影像資料 :驅動器電連接，包括：一感測處理器，依據該資料驅動 D:、肖耗電w資料，統計該影像資料的整體亮度分布；及 =制處理器’接收該統計結果，並據以產生—背光控制 .一：本發明另一顯示裝置適用於接收一影像資料，包含 :資料驅動器，接收該影像資料；一顯示面板 5亥資料驅動II . s ay y*· _ -. 動裔，及一影像修正電路，包括一感測處理器、 ^制處理$及—參考電壓產生器，該感測處理器依據該 、布驅動器的消耗電流資料’統計該影像資料的整體亮声 =，該控制處理器依據該統計結果輸出—參考電壓控： 而該參考電壓產生时有複數參考電壓組，且接收 出二2電壓控制信號來選取其中-參考電壓組，並依此輸 ^個分別代表不同亮度灰階的參考電壓；㈣料驅動 等參考電壓修正該影像㈣，而該顯示面板受該 、’’驢動器驅動以顯示修正後的影像資料。 料的f明另—影像修正電路適用於與-接收—影像資 4的貝料驅動器電連接，包括：一感測處理器， 耗電流資料，統計該影像資料的整體亮度分 ，—控制處理器，依據該統計結果輸出—參考電壓控制 200948048 信號；及一參考電壓產生器，存有複數參考電壓組，且接 收該參考電壓控制信號來選取其中一參考電壓組，並依此 輸出複數個分別代表不同亮度灰階的參考電壓。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之二個較佳實施例的詳細說明中，將可 清楚的呈現。 Q 在本發明被詳細描述之前，要注意的是，在以下的說 月内谷中，類似的元件是以相同的編號來表示。 恙二1較佳實施你丨 參閱圖2,本發明顯示裝置之第一較佳實施例包含一資 料驅動器1、-影像修正電路2、一顯示面3、一背光模 系且31、一時序控制胃4及一掃描驅動$ 5。且該影像修正 電路2輸出複數參考電麼到該資料驅動器工。 *玄貝料驅動器1接收一影像資料及來自該影像修正電 〇 ⑬2㈣等參考電壓’並依據該等參考電壓修正該影像資 料的亮度灰階值，且將修正後的影像資料從數位形式轉換 成類比形式，得到一類比資料作為輸出。本較佳實施例中 ’㈣像資料的亮度灰階值可以是灰階電壓值或灰階電流 值，且不以此為限。 假設本較佳實施例的顯示裝置為一平常黑（n〇rmally black)顯示裝置，顯示裝置呈現高亮度晝面時將提高該資料 驅動器1的電流消耗值，而顯示裝置呈現低亮度畫面時將 滅少該資料驅動器i的電流消耗值。假設本較佳實施例的 200948048 顯不裝置為一平常白（n〇rmaUy white)顯示裝置，電流消耗情 形相反。 該影像修正電路2包括一感測處理器21、—控制處理 器22及一參考電壓產生器23。 該感測處理器21具有一電流偵測器211、—類比數位 轉換器212及—統計器213。該電流偵測器211能偵測該資 料驅動器1的消耗電流資料，並轉換為一感應電壓當作輸 出而°亥電流倩測器211的實施例將於稍後再加以說明。該 類比數位轉換器212接收該感應電壓，並將其從類比形式 轉換成數位形式。該統計器213接收該數位形式的感應電 壓’以統計每一畫面的整體亮度分布。 該控制處理器22接收該統計結果，並據以輸出一參考 電壓控制信號及一背光控制信號。該參考電壓產生器23存 有複數相關伽瑪曲線的參考電壓組，且接收該參考電壓控 制信號，並據以選取其中一參考電壓組。該參考電壓產生 器23能依據該選出的參考電壓組輸出該等分別代表不同亮 度灰階的參考電壓。 該背光模組31包括-背光驅動器24，該背光驅動器 24接收該背光控制信號，並據以調整該顯示面板3的背光 源亮度。 该顯不面板3包括ΑΓχΜ個呈JVxM矩陣排列的畫素單元 32、N條掃描線Ls⑴、Ls⑺…Ls(N)& M條資料線[D⑴、 Ld(2)..，Ld(M)。該等掃描線Ls⑴、Ls(2)..‘Ls(N)與該等資料 線LD(1)、ld(2)…LD(M)相互交錯，且該等晝素單元32分別 200948048 位於該等掃描線Ls(l)、r r α )s(2)...Ls(N)與該等資料線 LD(1)、 Ld(2)…LD(M)的交會處。 該時序控制器4輸出一時序控制信號，來驅動該掃描 驅動器5及該資料驅動器卜該掃描驅動器5對每一掃描線 ^一掃描㈣。且該掃描驅動器5受該時序控制信號驅 動，而逐一致能該等掃描信號。 。。當該掃描線LS⑻的掃描信號被致能時，該資料驅動器 ❹ ❹ 1以該時序控制信號驅動’並將該類比資料透過該等資料 =二⑴LD(2)...LD(M)傳送到該顯示面板3的第n列相關 畫素皁元32’其中„ ϋ。 •欠本發明顯不裝置主要運用該資料驅動器工的消耗電流 資料’來作為調整影像資料與背光源亮度的依據。參閱圖、 ’-般顯示裝置如採用伽瑪值為22(如⑴的伽瑪曲線來 才:正輸入影像資料的亮度灰階值，當輸入影像資料的亮度 灰階值介於Α和Β間宾疮金二、 (儿度晝面），該顯示裝置將呈現A， 至B’間的顯示亮度。 ▲此時，β玄電流偵測器21 i將谓測到較大的消耗電流資料 ’該統計1 213對每-晝面之感應電壓值所計算得出的統 計結果偏高’致使該控制處理器22令該參考電壓產生器幻 輸出相關於較大伽瑪值的參考電壓，來修正下一畫面或下 個晝⑽可為卜π»的影像資料之亮度灰階值^到n 的對比。 ^田 从而田《亥顯TF裝置採用一較大伽瑪值（如⑺的伽瑪曲線時 ，若輸入影像資料的亮度灰階值介於A和B間，整體顯八 10 200948048 亮度範圍將介^ A，，和B，間，所呈現的對比變大。此外，該 控制處理4 22也令該背光驅動器24改變該顯示面板3的 背光源亮度’以彈性地調整消耗功率與晝面亮度、對比值 〇 參閱圖4，一般顯示裝置如採用伽瑪值為2.2(如yl)的伽 瑪曲線，當輸入影像資料的亮度灰階值介於c和D間（低亮 度畫面），該顯示裝置將呈現^至D，間的顯示亮度。 此時，該電流偵測器211將偵測到較小的消耗電流資料 ，該統計器213對每一畫面之感應電壓值所計算得出的統 計結果偏低，致使該控制處理器22令該參考電壓產生器幻 輸出相關於較小伽瑪值的參考電壓，來修正下一畫面或下η 個畫面（η可為1〜1 〇)的影像資料之亮度灰階值，以達到適當 的對比。 而當該顯示裝置採用一較小伽瑪值（如的伽瑪曲線時 ’若輸入影像資料的亮度灰階值介於C和D間，整體顯示 亮度範圍將介於C，和D，’間，所呈現的對比變大。此外，該 控制處理器22也令該背光驅動器24改變該顯示面板3的 背光源亮度，以達到適當的對比。 重流偵測器 。亥電流偵測器211能{貞測該資料驅動器1的消耗電流資 料，並轉換為一感應電壓當作輸出。該電流偵測器211可採 用以下三種實施態樣，且不以此為限。 該電流偵測器211的第一實施態樣是：參閲圖5，該電 流偵測器211具有一電阻器R1及一放大器AMP1。該電阻 200948048 器R1的第一端接收一外界電壓侧，❿該電阻器W的第 二端電連接於該放大器A刚的輸人端。該電阻器幻與該 放大器AMP1的電連接處接收該資料驅動器i的消耗電流 資料，且該放大器AMP1的輸出端輸出該感應電壓Μ广 其中’ A為放大器AMP1的電壓增益，％為放大器ΑΜρι 的輸入端電壓。 ΟThe image correction circuit of the present invention is adapted to be electrically connected to a receiving image data: a driver, comprising: a sensing processor, driving the D:, the power consumption w data according to the data, and calculating the overall brightness distribution of the image data; and The processor 'receives the statistical result and generates a backlight control. The other display device of the present invention is adapted to receive an image data, comprising: a data driver, receiving the image data; and a display panel 5 s ay y*· _ -. Motivation, and an image correction circuit, including a sensing processor, a processing processor, and a reference voltage generator, the sensing processor is based on the current consumption data of the cloth driver 'Statistically the overall light of the image data =, the control processor outputs according to the statistical result - reference voltage control: and the reference voltage is generated when there is a plurality of reference voltage groups, and the two 2 voltage control signals are received to select the reference a voltage group, and accordingly, a reference voltage representing a different brightness gray scale; (4) a reference voltage such as a material drive to correct the image (4), and the display panel is subjected to the Donkey actuator drive to display the image data after the correction. The image correction circuit is adapted to be electrically connected to the beaker driver of the -receiving image 4, comprising: a sensing processor, current consumption data, and an overall brightness score of the image data, - the control processor According to the statistical result output - reference voltage control 200948048 signal; and a reference voltage generator, stored with a plurality of reference voltage groups, and receiving the reference voltage control signal to select one of the reference voltage groups, and accordingly output a plurality of respectively representative Reference voltages for different brightness gray levels. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention. Q Before the present invention is described in detail, it is to be noted that in the following description, similar elements are denoted by the same reference numerals. 2 is a preferred embodiment. Referring to FIG. 2, a first preferred embodiment of the display device of the present invention includes a data driver 1, an image correction circuit 2, a display surface 3, a backlight module, and a timing control. Stomach 4 and a scan drive $5. And the image correcting circuit 2 outputs a plurality of reference signals to the data driver. * Xuanbei material driver 1 receives an image data and a reference voltage from the image correction electrode 132 (4) and corrects the brightness gray scale value of the image data according to the reference voltages, and converts the corrected image data from a digital form to a digital form Analogy form, get an analogy of the data as an output. In the preferred embodiment, the luminance grayscale value of the image data may be a grayscale voltage value or a grayscale current value, and is not limited thereto. It is assumed that the display device of the preferred embodiment is a normal black (n〇rmally black) display device, and the current consumption value of the data driver 1 is increased when the display device exhibits a high-brightness face, and the display device presents a low-brightness picture. The current consumption value of the data driver i is reduced. It is assumed that the 200948048 display device of the preferred embodiment is a normal white (n〇rmaUy white) display device, and the current consumption is reversed. The image correcting circuit 2 includes a sensing processor 21, a control processor 22, and a reference voltage generator 23. The sensing processor 21 has a current detector 211, an analog digital converter 212, and a statistic 213. The current detector 211 can detect the current consumption data of the data driver 1 and convert it into an induced voltage as an output. An embodiment of the current current detector 211 will be described later. The analog to digital converter 212 receives the induced voltage and converts it from an analog form to a digital form. The statistic 213 receives the induced voltage of the digital form to count the overall luminance distribution of each picture. The control processor 22 receives the statistical result and outputs a reference voltage control signal and a backlight control signal accordingly. The reference voltage generator 23 stores a reference voltage group of a complex correlation gamma curve, and receives the reference voltage control signal, and selects one of the reference voltage groups accordingly. The reference voltage generator 23 is capable of outputting the reference voltages respectively representing different luminance gray scales according to the selected reference voltage group. The backlight module 31 includes a backlight driver 24 that receives the backlight control signal and adjusts the backlight brightness of the display panel 3. The display panel 3 includes a pixel unit 32 arranged in a JVxM matrix, N scanning lines Ls(1), Ls(7)...Ls(N)& M data lines [D(1), Ld(2).., Ld(M) . The scan lines Ls(1), Ls(2)..Ls(N) are interleaved with the data lines LD(1), ld(2)...LD(M), and the pixel units 32 are located at 200948048 respectively. The intersection of the scan lines Ls(l), rr α )s(2)...Ls(N) and the data lines LD(1), Ld(2)...LD(M). The timing controller 4 outputs a timing control signal for driving the scan driver 5 and the data driver to scan (4) each scan line. And the scan driver 5 is driven by the timing control signal, and the scan signals can be uniformly matched. . . When the scan signal of the scan line LS (8) is enabled, the data driver ❹ 以 1 drives the 'the timing control signal' and transmits the analog data to the data = two (1) LD (2) ... LD (M) to The nth column of the display panel 3 is related to the pixel element 32', wherein the display device of the present invention mainly uses the current consumption data of the data driver to serve as a basis for adjusting the brightness of the image data and the backlight. Figure, '---the display device uses a gamma curve of gamma value of 22 (such as (1): the brightness grayscale value of the input image data, when the brightness grayscale value of the input image data is between Α and Β Sore gold II, (children's face), the display device will display the brightness between A, and B'. ▲ At this time, the β-sinusoidal current detector 21 i will measure the large current consumption data. The statistical result of the 1 213 calculated value of the induced voltage value per 昼 face is high, so that the control processor 22 makes the reference voltage generator phantom output related to the reference voltage of the larger gamma value to correct One picture or the next picture (10) can be image data of π» The contrast of the brightness grayscale value ^ to n. ^Tian Tiantian "Hai Xian TF device uses a large gamma value (such as (7) gamma curve, if the input image data brightness gray value between A and B , the overall display eight 10 200948048 brightness range will be between A,, and B, the contrast presented becomes larger. In addition, the control process 4 22 also causes the backlight driver 24 to change the backlight brightness of the display panel 3 Elastically adjust the power consumption and the brightness of the surface, the contrast value. Referring to Figure 4, the general display device uses a gamma curve with a gamma value of 2.2 (such as yl). When the brightness of the input image data is between c and D. Between (low-brightness screen), the display device will display the display brightness from ^ to D. At this time, the current detector 211 will detect a smaller current consumption data, and the statistic 213 for each picture The statistical result calculated by the induced voltage value is low, so that the control processor 22 causes the reference voltage generator to output a reference voltage associated with a smaller gamma value to correct the next picture or the next n pictures (η Brightness gray scale of image data of 1~1 〇) Value to achieve proper contrast. When the display device uses a small gamma value (such as gamma curve), if the brightness grayscale value of the input image data is between C and D, the overall display brightness range will be The contrast presented between C, and D, ' becomes larger. In addition, the control processor 22 also causes the backlight driver 24 to change the backlight brightness of the display panel 3 to achieve proper contrast. The current detector 211 can detect the current consumption data of the data driver 1 and convert it into an induced voltage as an output. The current detector 211 can adopt the following three implementation manners, and is not limited thereto. The first embodiment of the current detector 211 is: Referring to FIG. 5, the current detector 211 has a resistor R1 and an amplifier AMP1. The first end of the resistor R1 receives an external voltage side, and the second end of the resistor W is electrically connected to the input end of the amplifier A. Receiving the current consumption data of the data driver i at the electrical connection between the resistor and the amplifier AMP1, and outputting the induced voltage to the output of the amplifier AMP1, where A is the voltage gain of the amplifier AMP1, and % is the amplifier ΑΜρι Input voltage. Ο
該電流偵測器m的第二實施態樣是：參閱圖6，該電 流福測器2H具有-電阻器R1及一放大器ΑΜρι。該電阻 器R1的第-端電連接於該放大器AMP1的輸人端，且該電 阻器R1的第二端接地。該電阻器R1與該放大器A·的 電連接處接收該資料驅動器丨的消耗電流資料，而該放大 器AMP1的輸出端輸出該感應電壓Μ%，其中，a為放大 器A刪的電壓增益，Vl為放大器ΑΜρι的輸入端電壓。 該電流偵測器211的第三實施態樣是：參閱圖7，該電 流偵測器211具有一電阻器R1及一差動放大器刪卜該 電阻g R1的第一端與第二端分別電連接該差動放大器 DIFF1的第一端與第二端。而電阻器ri的跨壓hi將等於 電阻器R1乘以流過其上 的輸出端輸出該感應電壓 DIFF1的電壓增益。 差-二較佳會施你丨 的電流I，且該差動放大器DIFF1 AxVR1 ’其中，a為差動放大器 參閱圖8,本發明顯示裝置之第二較佳實施例包含一資 料驅動益1、^象修正電路6、一背光模組3【、一顯示面 板3時序控制θ 4及—掃描驅動器5。其中，該影像修 12 200948048 • 正電路6包括—感測處理器61、一控制處理器22及一參考 - 電壓產生器23。除了該感測處理器61，其餘元件及相關作 動情形皆相似於第一較佳實施例，在此不予贅述。 該感測處理器61具有一電流複製器611、一電流比較 器612及一統計器613。 . 該電流複製器611能複製該資料驅動器1的消耗電流資 料當作輸出。本較佳實施例中，該電流複製器011是一如圖 9所不的電流鏡（current mirr〇r)，且不以此為限。該電流鏡 © 具有二個1^型電晶體Ml、M2。該電晶體M2的第一端電連 接於該電晶體M2的控制端及該電晶體M1的控制端。該電 晶體M2的第一端接收一外界電壓VDD，且該等電晶體M1 、M2的第二端分別接地。該電晶體M2的第一端接收該資 料驅動器1的消耗電流資料，若該等電晶體Μ1、Μ]相互 匹配，則該電晶體Ml之第一端的輸出電流值相等於該資料 驅動器1的消耗電流資料。 ❹ 該電流比較器612接收該電流複製器611的輸出電流及 一參考電流，並比較兩者輸出一對應電壓值。而該統計器 w 613接收該電流比較器612的輸出，以為統計每一畫面的整 . 體亮度分布。 本較佳實施例中，該電流比較器612可採用如圖1〇所 不的電路，且不以此為限。該電流比較器612具有二個p 型電晶體M3、M4及二個N型電晶體M5、M6。 該電晶體M5的第一端電連接於該電晶體M5的控制端 及該電晶體M6的控制端。該電晶體M6的第一端電連接該 13 200948048 電晶體M3的第二端。且該電晶體M3的控制端電連接於該 電晶體M4的控制端與第二端人其中，該等電晶體M5、M6 的第二端分別接地，而該等電晶體M3、M4巧第一端分別 接收一外界電壓VDD。 該電晶體M5的第一端接收該電流複製器611的輸出電 流，而該電晶體M4的第二端接收一參考電流Iref ,且由該 等電晶體M3、M6的電連接處輸出一電壓值VcMp。 當該電流複製器611的輸出電流大於該參考電流Iref 時，该電晶體M6導通且該電晶體M3不導通，而該_電壓值 Vcmp的電壓值近似零。當該電流複製器611的輸出電流小 於孩參考電流IREF時，該電晶體M6不導通且該電晶體M3 導通而該電壓值vcmp的電壓值近似該外界電壓VDD。 值得注意的是，該感測處理器61也可具有複數個如上 述的電流比較H 612，分別接收不同的參考電流值，以更精 確地比較出该電流複製器6丨丨之輸出電流的範圍。 值得注意的是’以上實施例中的影像修正電路2、6可 獨立出於顯示裝置。 \ 综上所述，本發明影像修正電路及包含此影像修正電 路的顯示裝置可透過該資料驅動g i的消耗電流資料，自 動地彈性更換多種相關於不同伽瑪值的參考電壓來修正影 :資料的亮度灰階值，並適切地調整背光源亮 耗 電量或增加亮度對比值，故確實能達成本發明之目的。-耗 &惟以上所述者，僅為本發明之較佳實施例而已， 此以此限定本發明實施之範圍，即大凡依本發明申請:利 14 200948048 月說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一習知顯示裝置之電路方塊圖； 圖2是一本發明顯示裝置之第一較佳實施例的電路方 圖3疋一轉換曲線圖，說明顯示裝置接收高亮度晝面 的影像資料；A second embodiment of the current detector m is: Referring to Figure 6, the current detector 2H has a resistor R1 and an amplifier ΑΜρι. The first end of the resistor R1 is electrically connected to the input end of the amplifier AMP1, and the second end of the resistor R1 is grounded. The electrical connection between the resistor R1 and the amplifier A· receives the current consumption data of the data driver ,, and the output of the amplifier AMP1 outputs the induced voltage Μ%, where a is the voltage gain of the amplifier A, and V1 is The input voltage of the amplifier ΑΜρι. The third embodiment of the current detector 211 is: Referring to FIG. 7, the current detector 211 has a resistor R1 and a differential amplifier. The first end and the second end of the resistor g R1 are respectively separated. The first end and the second end of the differential amplifier DIFF1 are connected. The voltage across the resistor ri will be equal to the voltage gain of the resistor R1 multiplied by the output terminal through which the induced voltage DIFF1 is output. The difference-two is preferably applied to the current I, and the differential amplifier DIFF1 AxVR1 'where a is a differential amplifier. Referring to FIG. 8, a second preferred embodiment of the display device of the present invention includes a data driving benefit. The image correction circuit 6, a backlight module 3, a display panel 3 timing control θ 4 and a scan driver 5. Wherein, the image repair 12 200948048 • The positive circuit 6 includes a sensing processor 61, a control processor 22 and a reference-voltage generator 23. Except for the sensing processor 61, the remaining components and related operations are similar to the first preferred embodiment, and are not described herein. The sensing processor 61 has a current replicator 611, a current comparator 612, and a statistic 613. The current replicator 611 can copy the current consumption data of the data driver 1 as an output. In the preferred embodiment, the current replicator 011 is a current mirror (current mirr〇r) as shown in FIG. 9 and is not limited thereto. The current mirror © has two 1 ^ type transistors M1, M2. The first end of the transistor M2 is electrically connected to the control terminal of the transistor M2 and the control terminal of the transistor M1. The first end of the transistor M2 receives an external voltage VDD, and the second ends of the transistors M1, M2 are respectively grounded. The first end of the transistor M2 receives the current consumption data of the data driver 1. If the transistors Μ1, Μ] match each other, the output current value of the first end of the transistor M1 is equal to that of the data driver 1. Current consumption data.电流 The current comparator 612 receives the output current of the current replicator 611 and a reference current, and compares the two outputs a corresponding voltage value. The statistic w 613 receives the output of the current comparator 612 to count the overall luminance distribution of each picture. In the preferred embodiment, the current comparator 612 can be a circuit as shown in FIG. 1 and not limited thereto. The current comparator 612 has two p-type transistors M3, M4 and two N-type transistors M5, M6. The first end of the transistor M5 is electrically connected to the control terminal of the transistor M5 and the control terminal of the transistor M6. The first end of the transistor M6 is electrically connected to the second end of the 13 200948048 transistor M3. The control end of the transistor M3 is electrically connected to the control end of the transistor M4 and the second end. The second ends of the transistors M5 and M6 are respectively grounded, and the transistors M3 and M4 are first. The terminals respectively receive an external voltage VDD. The first end of the transistor M5 receives the output current of the current replicator 611, and the second end of the transistor M4 receives a reference current Iref, and a voltage value is output from the electrical connection of the transistors M3, M6. VcMp. When the output current of the current replicator 611 is greater than the reference current Iref, the transistor M6 is turned on and the transistor M3 is not turned on, and the voltage value of the_voltage value Vcmp is approximately zero. When the output current of the current replicator 611 is smaller than the reference current IREF, the transistor M6 is not turned on and the transistor M3 is turned on and the voltage value of the voltage value vcmp approximates the external voltage VDD. It should be noted that the sensing processor 61 may also have a plurality of current comparisons H 612 as described above, respectively receiving different reference current values to more accurately compare the range of the output current of the current replicator 6丨丨. . It is to be noted that the image correction circuits 2, 6 in the above embodiments may be independent of the display device. In summary, the image correction circuit of the present invention and the display device including the image correction circuit can automatically change the reference voltages of different gamma values to automatically correct the current consumption data of the gi through the data: The brightness gray scale value, and the backlight light power consumption or the brightness contrast value are appropriately adjusted, so that the object of the present invention can be achieved. The above is only the preferred embodiment of the present invention, which is to limit the scope of the practice of the present invention, that is, the simple equivalent of the description of the application according to the present invention: Li 14 200948048 Variations and modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit block diagram of a conventional display device; FIG. 2 is a circuit diagram of a circuit diagram of a first preferred embodiment of the display device of the present invention, illustrating a display device receiving high Image data of the brightness side;
圖4是一轉換曲線圖，說明顯示裝置接收低亮度晝面 的影像資料； 圖5是一電路圖，說明電流偵測器的第一實施態樣； 圖6是一電路圖，說明電流偵測器的第二實施態樣； 圖7是一電路圖，說明電流偵測器的第三實施態樣； 圖8是一本發明顯示裝置之第二較佳實施例的電路方 塊圖； 圖9是一電路圖，說明第二較佳實施例的電流複製器 ;及 圖10是一電路圓，說明第二較佳實施例的電流比較器 15 200948048 【主要元件符號說明】 1 資料驅動器 5 掃描驅動器 2 影像修正電路 6 影像修正電路 21 感測處理器 61 感測處理器 211 電流彳貞測 611 電流複製器 212 類比數位轉換器 612 電流比較器 213 統計器 613 統計器 22 控制處理器 AMP1 放大器 23 參考電壓產生器 DIFF1 差動放大器 24 背光驅動器 Ls(l 〜N) 掃描線 3 顯示面板 LD(1〜M)資料線 31 背光模組 M1-M6 電晶體 32 畫素單元 R1 電阻器 4 時序控制器 164 is a conversion graph illustrating the display device receiving image data of a low-brightness image; FIG. 5 is a circuit diagram illustrating a first embodiment of the current detector; FIG. 6 is a circuit diagram illustrating the current detector FIG. 7 is a circuit diagram showing a third embodiment of the current detector; FIG. 8 is a circuit block diagram of a second preferred embodiment of the display device of the present invention; and FIG. 9 is a circuit diagram. A current replicator of the second preferred embodiment is illustrated; and FIG. 10 is a circuit circle illustrating the current comparator 15 of the second preferred embodiment. 200948048 [Explanation of main component symbols] 1 data driver 5 scan driver 2 image correction circuit 6 Image Correction Circuit 21 Sensing Processor 61 Sensing Processor 211 Current Measure 611 Current Replicator 212 Analog Digit Converter 612 Current Comparator 213 Statistic 613 Statistic Device 22 Control Processor AMP1 Amplifier 23 Reference Voltage Generator DIFF1 Poor Moving Amplifier 24 Backlight Driver Ls (1 ~ N) Scan Line 3 Display Panel LD (1 ~ M) Data Line 31 Backlight Module M1-M6 Transistor 32 Pixel Element R1 Resistor 4 Timing Controller 16