1327708 九、發明說明： 一- 【發明所屬之技術領域】 [〇〇1】本發明係關於一種觸控式顯示器之光訊號偵測方法，特別是 一種插入黑畫面以偵測觸控式顯示器之觸碰位置之光訊號偵測方 ·. 法0 【先前技術】 [002] 目前觸控螢幕所使用的技術可分為三種，分別為電阻式螢 幕、電容式螢幕以及波動式螢幕。用手指或無墨筆輕按螢幕可產 生電壓來操作電阻式螢幕。電容式螢幕利用人手指為導體以吸取 微小的電流來決定觸碰點位置。波動式螢幕的螢幕表面覆蓋著超 音波或紅外線，而手指阻斷駐波圖樣而完成位置偵測。 [003] -般互動式顯示料以藉由外掛之電喊電容偵測模組來 製作觸控式面板’但也可以藉由薄膜電晶體(TFT)陣列基板上製作 光感測益陣列來製作觸控式面板。 ·[_]請參考第1圖，液晶顯示器10中係為-種觸控式面板，其 中設置^复數個光感測器11A、11B、11C，用以感測光訊號。液 阳顯㈣10更設置有背光絲12<> t制者觸碰觸控式面板時， 由於手指遮斷環境光13B，因此光感測器11β將無法偵測到環境 光观，其所伽到者為由手指反射之背光M。相反地，光感測 器11A、此係_與境光13A、13C。因此在環境光很暗的時 候’光感·所感測到之訊號將如第2A圖所示，在環境光很亮 的時候’光感測器所感測到之訊號將如第2B圖所示。 _】如第i圖所示架構與侧方式，光感測器容易受到環境光的 丄腦 影響，使接職的tfl號酬困難。 【發明内容】 [0061本發明揭露—_控式顯示H之航號酬方法，其係在第 一時間以光感測器_第—光訊號；接著在第二時_入—黑晝 面_亚二5絲感測器偵測第二光訊號；而後再比較第—光訊號與 第光為虎並輸出第三光訊號，以決定接觸點於觸控式 位置。 [00_7]本發明另揭露—種顯示裝置，其包括有—觸控式面板，用以 員丁❼像减’其巾顯示裝置更包含有控制裝置與訊號感測 =控健置於第-時_示—影像訊 號於觸控式面板，且於第 :門’知黑色晝面光訊號於觸控式面板。訊號感測器可分別 間仙第—光訊號，且於第二時間侧第二光訊號。 發㈣賴人黑晝_齡與_方以更精準地 觸石亚位置。 恭明U心之糊及實施方式线明制以示範與解釋本 解釋。精砷與原理’亚且提供本發明之專利申請範圍更進一步之 []乂下在錢方式巾詳細敘述本㈣之詳細雜以及優點，其 施合日Γ使任何熟習相關技藝者了解本發明之技術内容並據以實 孰抑;{:，據ί說明書所揭露之内容、申請專利範圍及圖式，任何 ’’’、白Μ技蟄者當能理解本發明之目的及優點。 【實施方式】 ‘· "'圖為本1明所揭路之觸控式顯示器之光訊號偵測方法之 6 1327708 會偵測到表示觸碰位置的允點203。在第二時間插入黑晝面後， 此時光感測器將感測不到任何之光訊號。接著，將第一光訊號與 第二光訊號進行減法運算，由圖中可知，除了亮點2〇3之外，光 感測器所侧狀光減幾乎相同，因此將兩個訊號相減之後， ·- 齡留下表示觸碰位置之亮點％3，其餘位置之訊號相減後會實 . 質上相等。 [019]以下配合第6圖說明應用第2圖之方法之顯示裝置之實施 • 例。需注意的是，第6圖所示之實施例僅作為示例性說明，並非 用以限制第2圖之方法實際所能應用之裝置。 [020】如圖所示’顯示裂置包括有觸碰式面板35〇用以顯示一影像 訊號。顯示裝置又包括有控制裝置310與訊號感測器32〇。控制 裝置310與訊號感測器320可設置於液晶顯示裝置中，或者有機 發光二極體顯示器中。 [021]控制裝置310於第一時間顯示一影像訊號於觸控式面板，且 鲁於第二時間顯示一黑色晝面光訊號於觸控式面板。訊號感測器分 別於第-時間翻第-光訊號，且於第二時㈣測第二光訊號。 如前所述，控制裝置之操作頻率至少為45Hz。 [022】在具有背光光源360的觸控式顯示器之一實施例中，背光光 源360提供背光給顯示裝置中的觸碰式面板35〇，控制裝置3ι〇 電性連結背光光源360。在此實施例，光感測器在第一時間係偵 測接觸點反射背光光源360提供之光線以及環境光線，第一光訊 號則包括有反射背光光源360提供之光線以及環境光線。控制裝 置3!0於第二時間關閉背光光源36〇，光訊號感測器32〇於第二 9 1327708 恰間谓測％ 、境光線’第二光訊號則包括環境光線。 _在另-實施例中，顯示裝置更包括一緩衝器33〇，電性連結 矾號感測器320，用以接收訊號感測器32〇所感測之第一光訊號 與第-光峨，並暫存該第—光訊號與該第二光訊號。 '[〇24】顯示裝置可包括一資料處理器340電性連結緩衝器33〇，或 •者至接電性連結至訊號_器顶，用以接收第-光訊號與第二 光减以處理第-光魏與第二光峨，以決定接觸點於觸控 攀式螢幕上之位置。資料處理器34〇可包含一比較器341用以比較 第-光訊號與第二絲號，以輸出第三光訊號。 [025] 在另-實施例中’顯示裝置更包括有一背光光源細，其中 控制裝置310電性連結背光光源細，且控制裝置31()於第二時 間關閉背光光源360，以插入一黑晝面。 [026] 在另-實施例中，顯示裝置包括有複數個畫素電極挪，其 中控制裝置310電性連結該晝素電極3?〇，且於第二時間傳輸一 # 顯示黑色晝面訊號至該複數個晝素電極37〇。 [027】根據以上所揭露之實施例，利用插入一黑晝面來摘測環境光 的影響，可提高接觸點定位的精準度。 [028]第7圖為本發明應用於液晶顯示裝置之示意圖，該圖所示之 實施例僅作為示例性說明，並非用以限制第2圖之方法實際所能 應用之裝置。圖中所示之液晶顯示裝置包括陣列基板41〇、彩色 渡光片基板420、設置於陣列基板410與彩色濾光片基板42〇之 間的液晶層430、背光模組440、以及偏光層45〇、46〇。陣列基 板410上可包含薄膜電晶體（圖中未示）、共用電極（圖中未示） 1327708 以及晝素電極（圖中未示），彩色濾光片基板420包含黑色矩陣（圖 中未示）以及彩色濾光片層（圖中未示）。背光模組440用以提供 充足的亮度與分佈均勾的光源，使液晶顯示裝置能正常顯示影 像。偏光層460位於彩色濾光片基板420之表層，用以將自然光 轉變成具有偏振特性的偏極化光(polarized light)。偏光層450則配 置於陣列基板41〇與背光模組440之間。實施例所使用之光訊號 感測态470A ' 470B .係設置於陣列基板上，詳細配置請參考第8 φ 圖。 [029]掃瞎線G1至G2和資料線D1至D2形成在陣列基板41〇上， 並且掃瞄線與資料線彼此相交定義畫素區域，圖中僅標示掃瞄線 G1至G2和資料線D1至D2，實際上掃瞄線與資料線均具有複數 條。每-晝素區域中都具有液晶單元54G與光訊號感測器55〇。. 晝素區域中的每-液晶單元54Q連接㈣線與㈣線，光訊號感 測斋550則連接至掃瞄線G1至G2與感測訊號線S1至％。 鲁[030]掃瞄線G1至G2由掃瞄驅動器51〇控制，掃瞄驅動器51〇 依次提供掃晦脈衝至G1至G2。資料線以至D2由資料驅動器 控制，資料驅動器52〇向提供資料脈衝。掃瞄脈衝為開啟電 壓，用於開啟液晶單元54〇中薄膜電晶體（圖中未示），資料脈衝 為液晶材料驅動電壓，用於改變液晶分子的配向。感測訊號線S1 至S2由感測訊號驅動器530控制。 [031]配合第6圖之實施例，當使用者觸碰觸控式面板時，控制裝 1 310於第—時間顯示一影像訊號於觸控式面板，此時當使用者 1碰觸控式面板時，由於手指遮斷環境光μ，因此光訊號感測 11 1327708 器470A縣法侧到環境光15A，其所制到者為由手指反射之 背光16。光訊號感測器47〇B係感測到環境光】5β。光感测哭 碰、侧在第-時間係侧接觸點反射背光光源提供之光線以 聽境光線，第-光簡職括有反射#絲源提供之光線以及 她光線。接著，控制裝置3K)於第二時間顯示_ 者面 躲觸控式面板。光訊號感測器概、侧於第；;^偵測環 境光線，第二光訊號則包括環境光線。 #网雖然本發明以前述實施例揭露如上，然其並非用以限定本發 明。在不脫離本發明之精神和範圍内，所為之更動與潤飾，均屬 本發明之專利保護範圍。 【圖式簡單說明】 第1圖係為先前技術所揭露之觸控式面板之示音圖β 第2Α圖與第2Β圖係為先前技術所揭露之觸时面板之光訊號感 測結果。 #第3 ®為本發簡揭露之糖式顯示器之光訊號制方法之流程 圖。 第圖至第4C圖為本發明所揭露之觸控式顯示器之光訊號偵測 方法之感測結果。 弟5Α圖至第5C圖為本發明所揭露之觸控式顯示器之光訊號偵測 方法之感測結果。 第6圖係為本發明所揭露之觸控式面板之示意圖。 第7圖係為本發明應用於液晶顯示裝置之示音圖。 第8圖係為本發明應用於液晶顯示裝置時之晝素示意圖。 12 1327708 【主要元件符號說明】 ίο....................液晶顯示器 11A..................光感測器 11B..................光感測器 11C..................光感測器 12....................背光光源 13A.................環境光1327708 IX. Description of the invention: 1 - [Technical field of the invention] [1] The present invention relates to a method for detecting an optical signal of a touch display, in particular, a method of inserting a black screen to detect a touch display Touch signal position detection method · Method 0 [Previous technology] [002] At present, the technology used in touch screen can be divided into three types: resistive screen, capacitive screen and wave screen. Press the screen with your finger or an inkless pen to generate a voltage to operate the resistive screen. A capacitive screen uses a human finger as a conductor to draw a small current to determine the location of the touch point. The screen surface of the wave screen is covered with ultrasonic or infrared rays, and the finger blocks the standing wave pattern to complete the position detection. [003] The general interactive display material is used to fabricate the touch panel by means of an externally-plugged capacitance detecting module. However, it can also be fabricated by fabricating a photo-sensing array on a thin film transistor (TFT) array substrate. Touch panel. [_] Please refer to Fig. 1. The liquid crystal display 10 is a touch panel in which a plurality of photo sensors 11A, 11B, and 11C are provided for sensing optical signals. The liquid sensor display (4) 10 is further provided with the backlight wire 12<> t when the touch panel is touched, since the finger blocks the ambient light 13B, the light sensor 11β cannot detect the ambient light, and the light sensor The person is the backlight M reflected by the finger. Conversely, the photo sensor 11A, this is the ambient light 13A, 13C. Therefore, when the ambient light is very dark, the light sensed signal will be as shown in Figure 2A. When the ambient light is very bright, the signal sensed by the light sensor will be as shown in Figure 2B. _] As shown in Figure i, the structure and side mode, the light sensor is susceptible to the impact of ambient light, making it difficult to accept the tfl. SUMMARY OF THE INVENTION [0061] The invention discloses that the control method displays the nautical number of the H, which is the first time with the light sensor _ the first light signal; then the second time _ the input - the black 昼 surface _ The second two-wire sensor detects the second optical signal; then compares the first optical signal with the first optical signal and outputs a third optical signal to determine the contact point at the touch position. [00_7] The present invention further discloses a display device comprising a touch panel for accommodating the image display device and including a control device and a signal sensing device. _ indicates that the image signal is on the touch panel, and in the first: the door 'know black surface light signal on the touch panel. The signal sensor can be separated from the first optical signal and the second optical signal at the second time. Hair (4) Lai people black 昼 _ age and _ side to more accurately touch the stone sub-location. Congratulations on the U-heart paste and the implementation of the system to demonstrate and explain this explanation. The arsenic and the principle of the invention are further provided in the scope of the patent application of the present invention. The details and advantages of the invention are described in detail in the money method, and the application of the present invention is known to those skilled in the art to understand the present invention. The technical content is based on the actual content; {:, according to the content disclosed in the specification, the scope of the patent application and the schema, any '', white-handed technician can understand the purpose and advantages of the present invention. [Embodiment] The ‘· " 'Fig. 1 1327708 of the optical signal detecting method of the touch display disclosed in the first aspect of the present invention detects the allowable point 203 indicating the touch position. After the black mask is inserted at the second time, the light sensor will not sense any light signals at this time. Then, the first optical signal and the second optical signal are subtracted. As can be seen from the figure, except for the bright spot 2〇3, the side light reduction of the photo sensor is almost the same, so after subtracting the two signals, ·- Ages indicate the highlight point %3 of the touch position. The signals of the remaining positions will be subtracted and will be qualitatively equal. An embodiment of a display device to which the method of Fig. 2 is applied will be described below with reference to Fig. 6. It is to be noted that the embodiment shown in Fig. 6 is merely illustrative and is not intended to limit the actual application of the method of Fig. 2. [020] As shown, the display splicing includes a touch panel 35 for displaying an image signal. The display device further includes a control device 310 and a signal sensor 32A. The control device 310 and the signal sensor 320 can be disposed in the liquid crystal display device or in the organic light emitting diode display. [021] The control device 310 displays an image signal on the touch panel at the first time, and displays a black surface light signal on the touch panel in the second time. The signal sensor turns the first-light signal at the first time and the second light signal at the second time (four). As mentioned previously, the control unit operates at a frequency of at least 45 Hz. In one embodiment of a touch sensitive display having a backlight source 360, the backlight source 360 provides backlighting to a touch panel 35 in the display device, and the control device 3 is electrically coupled to the backlight source 360. In this embodiment, the photo sensor detects the contact point reflecting the light provided by the backlight source 360 and the ambient light in a first time, and the first optical signal includes the light provided by the reflective backlight source 360 and the ambient light. The control device 3!0 turns off the backlight source 36〇 at the second time, and the optical signal sensor 32 is in the second 9 1327708. The second light signal includes the ambient light. In another embodiment, the display device further includes a buffer 33 〇 electrically connected to the 感 sensor 320 for receiving the first optical signal and the first optical 感 sensed by the signal sensor 32 峨. And temporarily storing the first optical signal and the second optical signal. '[24] The display device may include a data processor 340 electrically connected to the buffer 33, or connected to the signal_top for receiving the first-light signal and the second light to be processed. The first - the light and the second light to determine the position of the contact point on the touch-climbing screen. The data processor 34A may include a comparator 341 for comparing the first optical signal with the second wireless signal to output a third optical signal. [025] In another embodiment, the display device further includes a backlight source, wherein the control device 310 is electrically connected to the backlight source, and the control device 31 () turns off the backlight source 360 at a second time to insert a black box. surface. [026] In another embodiment, the display device includes a plurality of pixel electrodes, wherein the control device 310 electrically connects the pixel electrode 3?〇, and transmits a #black signal to the second time to The plurality of halogen electrodes are 37 〇. According to the above disclosed embodiment, the accuracy of the contact point positioning can be improved by inserting a black surface to extract the influence of ambient light. Fig. 7 is a schematic view showing the application of the present invention to a liquid crystal display device, and the embodiment shown in the figure is merely illustrative and is not intended to limit the practical application of the method of Fig. 2. The liquid crystal display device shown in the figure includes an array substrate 41, a color light guide substrate 420, a liquid crystal layer 430 disposed between the array substrate 410 and the color filter substrate 42, a backlight module 440, and a polarizing layer 45. 〇, 46〇. The array substrate 410 may include a thin film transistor (not shown), a common electrode (not shown) 1327708, and a halogen electrode (not shown). The color filter substrate 420 includes a black matrix (not shown). And a color filter layer (not shown). The backlight module 440 is configured to provide sufficient brightness and distribution of the light source to enable the liquid crystal display device to display images normally. The polarizing layer 460 is located on the surface of the color filter substrate 420 for converting natural light into polarized light having polarization characteristics. The polarizing layer 450 is disposed between the array substrate 41 and the backlight module 440. The optical signal sensed state 470A '470B is used on the array substrate. For detailed configuration, please refer to the 8th φ diagram. [029] The broom lines G1 to G2 and the data lines D1 to D2 are formed on the array substrate 41, and the scan lines and the data lines intersect each other to define a pixel area, and only the scan lines G1 to G2 and the data lines are indicated in the figure. D1 to D2, in fact, both the scan line and the data line have a plurality of lines. The liquid crystal unit 54G and the optical signal sensor 55 are provided in each of the halogen regions. Each liquid crystal cell 54Q in the halogen region is connected to the (four) line and the (four) line, and the optical signal sensing 550 is connected to the scanning lines G1 to G2 and the sensing signal line S1 to %. Lu [030] scan lines G1 to G2 are controlled by scan driver 51, and scan driver 51 依次 sequentially supplies broom pulses to G1 to G2. The data line and D2 are controlled by the data driver, and the data driver 52 provides the data pulse. The scan pulse is an on-voltage, which is used to turn on the thin film transistor (not shown) in the liquid crystal cell 54. The data pulse is a driving voltage of the liquid crystal material for changing the alignment of the liquid crystal molecules. The sense signal lines S1 to S2 are controlled by the sense signal driver 530. [031] With the embodiment of FIG. 6, when the user touches the touch panel, the control device 1 310 displays an image signal on the touch panel at the first time, and when the user 1 touches the touch panel. In the panel, since the finger blocks the ambient light μ, the optical signal senses 11 1327708 470A county side to ambient light 15A, which is produced by the backlight 16 reflected by the finger. The optical signal sensor 47〇B senses ambient light] 5β. The light senses the crying touch, and the side touches the light provided by the backlight source to the ambient light at the first-time side contact point, and the first light includes the reflection light provided by the silk source and her light. Next, the control device 3K) displays the _ face to face touch panel at the second time. The optical sensor is located on the side of the first;; ^ detects ambient light, and the second optical signal includes ambient light. Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the present invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sound diagram of a touch panel disclosed in the prior art. FIG. 2 and FIG. 2 are optical signal sensing results of the touch panel disclosed in the prior art. #第3® is the flow chart of the optical signal manufacturing method of the sugar display disclosed in the present disclosure. The figures to 4C show the sensing results of the optical signal detecting method of the touch display disclosed in the present invention. The figures 5 to 5C show the sensing results of the optical signal detecting method of the touch display disclosed in the present invention. Figure 6 is a schematic view of the touch panel disclosed in the present invention. Fig. 7 is a sound diagram of the present invention applied to a liquid crystal display device. Fig. 8 is a schematic view showing the principle of the present invention applied to a liquid crystal display device. 12 1327708 [Description of main component symbols] ίο....................LCD display 11A.................. Photosensor 11B..................Photosensor 11C..................Photosensor 12.........................Backlight source 13A................. Ambient light
13B..................環境光 13C..................環境光 14....................背光 15A.................環境光 15B..................環境光 16....................背光 200 ..................可觸碰區 201 ..................手指 202 ..................亮點 203 ..................亮點 310..................控制裝置 320..................訊號感測器 330..................緩衝器 340..................資料處理器 341..................比較器 觸碰式面板 13 350 1327708 360..................背光光源 370..................晝素電極 410..................陣列基板 420..................彩色濾光片基板 430..................液晶層 440..................背光模組 450..................偏光層13B.................. Ambient light 13C.................. Ambient light 14....... .............Backlight 15A................. Ambient light 15B............... ...ambient light 16....................Backlight 200 .................. Touchable area 201 ..................finger 202 .................. Highlight 203 ......... .........亮点310..................Control device 320.................. Signal sensor 330..................buffer 340..................data processor 341.. ................ Comparator touch panel 13 350 1327708 360..................backlight source 370... ............... Alizarin electrode 410..................Array substrate 420.......... ........Color Filter Substrate 430..................Liquid Crystal Layer 440............... ...backlight module 450..................polarizing layer
460..................偏光層 470A...............光訊號感測器 470B................光訊號感測器 510..................掃瞄驅動器 520..................資料驅動器 530..................感測訊號驅動器 540..................液晶單元 550..................光訊號感測器 G1...................掃瞄線 G2...................掃猫線 D1...................資料線 D2...................資料線 51 ....................感測訊號線 52 ....................感測訊號線460..................polarizing layer 470A...............Optical signal sensor 470B....... .........Optical signal sensor 510..................Scan driver 520............. .....data driver 530..................sensing signal driver 540..................LCD Unit 550..................Optical signal sensor G1...................Scan line G2. ..................Sweeping cat line D1...................data line D2...... .............data line 51 ....................sensing signal line 52 ......... ...........sense signal line