1361373 九、發明說明： 置之定位方法，尤指一種具輸入功 【發明所屬之技術領域】 本發明係提供一種顯示裝 能之顯示裝置之定位方法。 【先前技術】1361373 IX. Description of the invention: A positioning method, in particular, an input function. [Technical Field of the Invention] The present invention provides a positioning method for displaying an installed display device. [Prior Art]
液，示器由於具有外型輕薄、耗電量少以及無輕射污染等特 成為目前最被廣泛使用之平面顯示器。而在各種包含液晶 加益之好裝置巾’齡：㈣體触器、手機或個人數位助 了DA)4姆置’糊液晶顯示器執行觸碰輸入的功能已漸成 流行，因此，觸碰式螢幕的應用越來越廣泛。 傳統觸碰式螢幕以電阻式觸碰螢幕及電容式觸碰螢幕為主， 電阻式觸碰螢幕係以電餅定_碰位置，電容式觸碰螢幕通常 包含感測電容，根據對應於觸碰點之感測電容的電容變化，經訊 號處理而定位_碰位置。由於習知_面板與液晶顯示面板係 分開製作後，再將觸碰面板與液晶顯示面板組裝一起，因此會有 重量較重、成本較高、以及透光率較低等缺點，為了解決上述缺 點，近來發展出將觸碰元件與顯示元件製作於同一面板上，以形 成一具有觸碰功能之液晶顯示面板。 請參考第1圖，第1圖為習知顯示裝置之觸碰單元的剖面示 意圖。如第1圖所示，感應單元10包含有一光感應元件12、一續 6 1361373 出元件14、-黑色矩陣16以及一液晶層18，其中光感應元件12 與讀出元件14 t配置於-基板20上，黑色矩陣16則配置於一對 向基板22上，液晶層18配置於基板2〇與對向基板22之間。位 於對向基板22上之黑色矩陣16具有一開口 24，使得夕卜界之光線 可藉由此開口 24照射於光感應元件12上，因此光感應元件12之 通道將有光電流產生，當操作齡裝置時，可姻手指遮斷光線 之入射以降低人光量或利用光筆照射以增加人光量，使光感應元 φ件I2通道區上之光電流產生變化，因而可定位出觸碰之位置。 ◊由於此方祕藉由人·之變化來定位觸碰位置，因 文到外界環境猶之亮麟影響，特服躲 手指遮斷光線之枝可能造成域應元縣 或者贿太陽光下之環境，利用光筆照射 元件無法判別之情況。因此，提供-不受操作環境; 置之定位方法係為業界極力達成之課題。〜4之顯不裝 【發明内容】 本發明之主要目的在於提供一種顯 法，藉由觸碰顯示裝置之操作界面，使感岸置位方 流:變’而得以定義出觸碰位置，因：電 光線干擾之問題。 ^知易受環境 為達上述之目的， 本發明提供一種顯示裝置 之定位方法。首 7 丄則373 先，提供—儲存電容，並寫入—第_電荷至 對向瓣，___梅，兩者之間= 第H且感應元件產生-第―沒極電流朗賴第一電荷 為第^電荷。接著，觸碰顯示裝置’改變第—間隙為—第二間隙， 且調夂第-汲極電流為一第二沒極電流並調變該第一電荷為第三 ，荷。最後比較第二電荷與第三電荷之差異，以定義出一_ 置。The liquid and the display are the most widely used flat-panel displays due to their slimness, low power consumption and no light pollution. And in a variety of devices including LCD plus good device 'age: (four) body contact, mobile phone or personal digital help DA) 4 m set of 'liquid crystal display to perform touch input function has become popular, therefore, touch type Screen applications are becoming more widespread. The traditional touch screen is mainly composed of a resistive touch screen and a capacitive touch screen. The resistive touch screen is set to a touch position, and the capacitive touch screen usually includes a sensing capacitor according to the corresponding touch. The point senses the capacitance change of the capacitor, and the signal is processed to locate the _bump position. Since the conventional _ panel and the liquid crystal display panel are separately manufactured, the touch panel and the liquid crystal display panel are assembled together, so that there are disadvantages such as heavy weight, high cost, and low light transmittance, in order to solve the above disadvantages. Recently, it has been developed to form a touch element and a display element on the same panel to form a liquid crystal display panel having a touch function. Please refer to Fig. 1, which is a cross-sectional view of a touch unit of a conventional display device. As shown in FIG. 1 , the sensing unit 10 includes a light sensing element 12 , a continuous 6 1361373 output element 14 , a black matrix 16 , and a liquid crystal layer 18 , wherein the light sensing element 12 and the sensing element 14 t are disposed on the substrate. In FIG. 20, the black matrix 16 is disposed on the pair of substrates 22, and the liquid crystal layer 18 is disposed between the substrate 2 and the counter substrate 22. The black matrix 16 on the opposite substrate 22 has an opening 24, so that the light of the outer boundary can be irradiated onto the light sensing element 12 by the opening 24, so that the channel of the light sensing element 12 will have a photocurrent generated when operating. In the case of an aged device, the finger can block the incidence of light to reduce the amount of human light or to illuminate with a light pen to increase the amount of human light, so that the photocurrent on the channel region of the light-sensing element φI2 changes, so that the position of the touch can be located. ◊Because this recipe is used to locate the touch position by the change of the person, the influence of the text on the outside environment is still bright, and the special service to hide the finger to block the light may cause the domain to be under the county or the environment under the sun. The condition that the component cannot be discriminated by the light pen illumination. Therefore, providing - no operating environment; positioning methods are the subject of the industry's efforts. The main purpose of the present invention is to provide a display method by which the touch interface of the display device is touched, and the touch position is defined by : Problems with electrical light interference. The present invention provides a method of locating a display device. The first 7 373 373 first, provide - storage capacitance, and write - the first charge to the opposite valve, ___ plum, between the two = the first H and the sensing element produces - the first - no current flows the first charge Is the first charge. Next, the touch display device 'changes the first gap to the second gap, and adjusts the first-pole current to a second no-pole current and modulates the first charge to a third, charge. Finally, the difference between the second charge and the third charge is compared to define a set.
本發明藉由觸碰顯示裝置之操作界面，使感應元件與對向電 變，以嶋應元件之錄電流，織，再藉由沒極 職她增荷，因峨物路比較觸碰 剛後儲存f容上之電荷變化，可定義_碰之位置。 【實施方式】The invention touches the operation interface of the display device to make the sensing element and the opposite electrical change, to multiplex the recording current of the component, and then to increase the load by the inactive position, because the object road is relatively touched Store the change in charge on the f-capacity and define the position of the _ bump. [Embodiment]
如第:圖:,第2圖第2-圖為本發明顯示裝置之定位方法流程圖 牛驟siH —種顯不裝置之定位方法之流程包含下列步驟： 々驟1G，k供一儲存電容’並寫入一第一電荷至該儲存 電容； 步驟S20 步驟S30 提供-感應元件’配置於—預定位置，並電性 柄接至該儲存電容. 提供-對向電極’其配置於該感應元件的上方， 其中該感應7〇件與對向電極相距—第一間隙， 且對應於該預定位置，並產生一第一沒極電 8 丄361373 流’且調變第一電荷為第二電荷； 步驟S40 :觸碰該預定位置，改變該第一間隙為一第二間 隙，並調變該第一汲極電流為一第二汲極電流， 再利用該第二汲極電流，調變第一電荷為一第三 電荷；以及 步驟S50 :比較該第二電荷與該第三電荷之差異，以定義 預定位置。 請參考第3圖’並一併參考第2圖。第3圖為本發明顯示裝 置之畫素區域的電路示意圖。如第3圖所示，顯示裝置包含有複 數個晝素區域100 ’每個晝素區域1〇〇係由二資料線1〇2、1〇3與 二閘極線104、105定義出。畫素區域1〇〇内包含有一開關元件 106、一顯示區儲存電容Cst以及一液晶電容Clc。其中，部分畫 素區域100另包含有一感應元件(inducing element)l〇8、一讀出元 _件(咖(1〇1^也111611〇110、一儲存電容112以及一偏壓電極114。如 第2圖與第3圖所示，在上述定位方法之流程中，步驟sl〇可不 只提供一儲存電容112，而可另包含提供該讀出元件u〇、一讀出 線U6以及一讀出電路(readout circuit)118，其中儲存電容112之 第私點係電性賴接至讀出元件11〇之源極s，讀出元件11〇之閘 極G電性耦接至閘極線1〇4，並且讀出元件11〇之汲極d係藉由 讀出線116電性搞接於讀出電路118。然後，藉由提供一問極驅動 訊號經閘極線104傳遞至讀出元件11〇之閘極G，使讀出元件ιι〇 導通，因此，讀出電路118可經由讀出線〗16與讀出元件丨⑴寫 9 丄观373 入電荷至儲存電容112或讀出儲存電容112之電荷。 請參考第4® ’並-併參考第2圖和第3圖。第4圖為本發 明顯示裝置之感應單元的剖面示意圖。如第4圖、第2圖與第3 圖所示，步驟S20係提供一感應元件1〇8，設置於一基板126面對 於對向基板122之-側，並配置於該預定位置處，且電性輕接至 該儲存電容(财未繪出），並寫入一第一電荷至該儲存電容，感應 • 兀件108的結構包含有一閘極G、一閘極絕緣層128、一通道13〇、 一高摻雜區域132、-源極S、—祕D以及―保護層134…其 中，感應元件108之閘極G與源極s電性耦接至儲存電容112之 一第二端點’以及電性耦接感應元件1〇8之汲極D至儲存電容1C 之第-端點，感應/0件1〇8之閘極〇與源極s以及儲存電容⑴ 之第二端點皆電性雛至—偏壓電極114，並且提供—偏壓至該偏 壓電極114。值得注意的是’此偏壓電極114 ,亦可為一畫素區域 100之共通電極’因此偏壓電極114亦可電性輕接至對向電極 124。步驟S30係提供-對向電極(c〇untereIectr〇de)i24配置感應 兀件的上方，其中感應元件】〇8與對向電極】24之間相距一第一 間隙dl ’並且未觸碰該預定位置之情況下，感應元件可產生一第 -汲極電流’調變該第一電荷為一第二電荷。於步驟_之前另 可包含提供-遮光看136，以避免環境光線對感應元件⑽之干 擾，或用非透明的金屬來製作對向電極124，亦可達到遮蔽環境光 的效果，而在未觸碰預定位置時，可根據感應元件⑽之導通狀 態，定義第二電荷為背景訊號，其中遮光層136設置於對向電極 1361373 124與對向基板122之間。另外，一液晶層138設置於感應元件 108與對向電極124之間。 請參考第5圖，並一併參考第2圖。第5圖為本發明感應單 元之對向基板受外力而形變之剖面示意圖。如第5圖與第2圖所 示，步驟S40係觸碰該預定位置，使第一間隙dl縮小為一第二間 隙d2 ’由於對向電極124與感應元件108間之間隙縮小，對向電 φ 極124之電壓對於感應元件108之導通狀態的影響增強，亦即， 當對向電極124接近感應元件log時，對向電極丨24之電壓可對 感應元件108之通道130造成一感應電場，使通道丨3〇中之電子 會受到感應電場影響，因而可調變第一汲極電流為一第二汲極電 流，再利用該第二汲極電流，調變第一電荷為一第三電荷。 因該感應元件108電性耦接於該儲存電容^2，且該感應元 件108之汲極電流已從該第一汲極電流調變為該第二汲極電流， 翁 因此可利用此第二沒極電流，將原本位於儲存電容112之第一電 荷調變為-第三電荷，所以在觸碰預定位置時，可根據感應元件 108之導通狀態’定義第三電荷為一感應訊號。在步驟S5〇之前 另包含將該感應訊號經該讀出元件11〇與該讀出線116傳遞至讀 出電路118’因而步驟S5〇可利用讀出電路118比較第二電荷與第 三電荷之差異，'騎分減應減或比較其前景訊號之差異， 以定義出預定位置。 ' 丄北1373 主請參考第6圖’第6圖為本發明感應元件於固定祕電壓之 情况下閘極電壓與没極電流之關係圖。本發明係分成五種不同間 隙大小來做比較，其間隙大小分別為卜0.75、〇.5、〇.25與〇微米， 不同之間隙大小可用來表示不同大小之觸碰力量程度。如第6圖 所肀虽間隙為1微米時，此種條件之汲極電流係為最小，而當 間隙為0微料’其汲極電流為最大，即表示間隙越小，則祕 電流值越大。利用此汲極電流的變化可用以調變儲存電容之電 荷，因此，本發明可利用讀出電路來比較觸碰前後儲存電容之電 荷差異，定義出觸碰位置。值得注意的是，本發明之感應元件具 有較佳之操作範圍，此操作範圍為感應元件之閘極電壓小於感 應π件之汲極電壓，使汲極電流之大小隨著間隙大小而改變，讓 讀出電路得以辨別出汲極電流之變化所造成儲存電容之電荷差異 而定義出觸碰之位置。 請參考第7圖，第7圖為本發明顯示裝置之畫素區域電路的 另一實施樣態之示意圖。如第7圖所示，相較於第2圖之電路， 感應元件108之源極S係改接於一驅動線140’用以調整該感應元 件108上的偏壓，使其操作在最佳之靈敏度，且儲存電容112之 第二端點係電性耦接於該偏壓電極114,另一端點係電性耦接於該 感應元件108之汲極D。 綜上所述，本發明提供一顯示裝置之定位方法，藉由觸碰按 壓使感應元件與對向電極間之間隙改變，感應元件之汲極電流因 12 1361373 而產生變化，進而改變儲存電容之電荷訊號，因此藉由讀出電路 分析背景訊號與感應訊號之差異，可定義出觸碰位置，所以本發 明之觸碰方式可改善習知之光感應方式，以避免環境光線之干擾。 以上所述僅為本發明之較佳實施例，凡依本發明申請專利範 圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。 【圖式簡單說明】 第1圖為習知顯示裝置之觸碰單元的剖面示意圖。 第2圖為本發明顯示裝置之定位方法流程圖。 第3圖為本發明顯示裝置之晝素區域之電路示意圖。 第4圖為本發明顯示裝置之一感應單元的剖面示意圖。 第5圖為本發明感應單元之對向基板受外力而形變之剖面示意圖。 第6圖為本發明感應元件於固定汲極電壓之情況下閘極電壓與汲 極電流之關係圖。 第7圖為本發明顯示裝置之晝素區域電路的另一實施樣態之示意 圖。 【主要元件符號說明】 10 感應單元 12 光感應元件 14 讀出元件 16 黑色矩陣 18 液晶層 20 基板 22 對向基板 24 開口 13 1361373For example: Figure: Figure 2, Figure 2 - Figure 2 is a flow chart of the positioning method of the display device of the present invention. The flow of the method for positioning the device is as follows: Step 1G, k for a storage capacitor ' And writing a first charge to the storage capacitor; Step S20: Step S30 provides that the sensing element is disposed at a predetermined position, and is electrically connected to the storage capacitor. The providing-opposing electrode is disposed on the sensing element. Above, wherein the sensing element 7 is spaced from the counter electrode - the first gap, and corresponding to the predetermined position, and generates a first insufficiency 8 丄 361373 flow ' and modulating the first charge to a second charge; S40: touching the predetermined position, changing the first gap to a second gap, and modulating the first drain current to a second drain current, and using the second drain current to modulate the first charge Is a third charge; and step S50: comparing the difference between the second charge and the third charge to define a predetermined position. Please refer to Figure 3 and refer to Figure 2 together. Figure 3 is a circuit diagram showing the pixel area of the display device of the present invention. As shown in Fig. 3, the display device includes a plurality of halogen regions 100' each of which is defined by two data lines 1, 2, 1 and 3 and two gate lines 104, 105. The pixel area 1A includes a switching element 106, a display area storage capacitor Cst, and a liquid crystal capacitor Clc. The partial pixel area 100 further includes an inducing element l8, a read element (a coffee device (1〇1^111611〇110, a storage capacitor 112, and a bias electrode 114. As shown in FIG. 2 and FIG. 3, in the flow of the above positioning method, the step s1 may provide not only a storage capacitor 112 but may further include providing the read element u〇, a read line U6, and a readout. A readout circuit 118, wherein the first point of the storage capacitor 112 is electrically connected to the source s of the read element 11 , and the gate G of the read element 11 is electrically coupled to the gate line 1〇 4, and the drain d of the read element 11 is electrically coupled to the readout circuit 118 by the sense line 116. Then, a gate drive signal is transmitted through the gate line 104 to the readout element 11 by providing a gate drive signal. The gate G of the gate causes the read element to be turned on. Therefore, the readout circuit 118 can write the charge to the storage capacitor 112 or the read storage capacitor 112 via the sense line 16 and the read element 丨(1). Please refer to Section 4® 'and- and refer to Figures 2 and 3. Figure 4 is the sensing unit of the display device of the present invention. A cross-sectional view. As shown in FIG. 4, FIG. 2, and FIG. 3, step S20 provides an inductive element 1〇8 disposed on a side of a substrate 126 opposite to the opposite substrate 122 and disposed at the predetermined position. And electrically connected to the storage capacitor (not shown), and write a first charge to the storage capacitor, the structure of the sensing device 108 includes a gate G, a gate insulating layer 128, a channel 13A, a highly doped region 132, a source S, a secret D, and a "protective layer 134", wherein the gate G and the source s of the sensing element 108 are electrically coupled to one of the storage capacitors 112 The two terminals 'and the third terminal of the electrical coupling sensing element 1 〇 8 to the first end of the storage capacitor 1C, the gate 〇 and the source s of the sensing / 0 〇 8 and the second of the storage capacitor (1) The terminals are electrically connected to the bias electrode 114 and are biased to the bias electrode 114. It is noted that the bias electrode 114 may also be a common electrode of the pixel region 100. The pressure electrode 114 can also be electrically connected to the counter electrode 124. In step S30, the counter electrode (c〇untereIectr〇de) i24 is configured to be inductively configured. Above, wherein the sensing element 〇 8 and the opposite electrode 24 are separated from each other by a first gap dl ' and the predetermined position is not touched, the sensing element can generate a first-drain current A charge is a second charge. Before the step _, a light-shielding 136 may be included to prevent the ambient light from interfering with the sensing element (10), or the non-transparent metal may be used to form the counter electrode 124, and the shielding environment may be achieved. The effect of the light, when the predetermined position is not touched, the second charge is defined as the background signal according to the conduction state of the sensing element (10), wherein the light shielding layer 136 is disposed between the opposite electrode 1361373 124 and the opposite substrate 122. In addition, a liquid crystal layer 138 is disposed between the sensing element 108 and the counter electrode 124. Please refer to Figure 5 and refer to Figure 2 together. Fig. 5 is a schematic cross-sectional view showing the deformation of the opposite substrate of the induction unit according to the external force of the present invention. As shown in FIG. 5 and FIG. 2, step S40 touches the predetermined position to reduce the first gap d1 to a second gap d2' because the gap between the counter electrode 124 and the sensing element 108 is reduced, and the opposite direction is The voltage of the φ pole 124 has an increased influence on the conduction state of the sensing element 108, that is, when the counter electrode 124 approaches the sensing element log, the voltage of the counter electrode 丨 24 can cause an induced electric field to the channel 130 of the sensing element 108. The electrons in the channel 丨3〇 are affected by the induced electric field, so that the first drain current can be changed to a second drain current, and the second drain current is used to modulate the first charge to a third charge. . Since the sensing element 108 is electrically coupled to the storage capacitor ^2, and the drain current of the sensing element 108 has been changed from the first drain current to the second drain current, the second can be utilized. The immersed current changes the first charge originally located at the storage capacitor 112 to a third charge, so that when the predetermined position is touched, the third charge can be defined as an inductive signal according to the conduction state of the sensing element 108. Before step S5, the sensing signal is further transmitted to the readout circuit 118 through the readout element 11 and the readout line 116. Thus, the readout circuit 118 can be used to compare the second charge and the third charge. Difference, 'riding the score minus the difference or comparing the difference between the foreground signals to define the predetermined position. ' 丄北 1373 Main Please refer to Figure 6'. Figure 6 is a diagram showing the relationship between the gate voltage and the immersion current in the case where the sensing element of the present invention is fixed. The present invention is divided into five different gap sizes for comparison. The gap sizes are respectively 0.75, 〇.5, 〇.25, and 〇micron. Different gap sizes can be used to indicate the degree of touch force of different sizes. As shown in Fig. 6, when the gap is 1 micron, the threshold current of this condition is the minimum, and when the gap is 0 micro material, the peak current is the largest, that is, the smaller the gap, the more the secret current value is. Big. The change in the drain current can be used to modulate the charge of the storage capacitor. Therefore, the present invention can utilize the readout circuit to compare the difference in charge between the storage capacitors before and after the touch, and define the touch position. It should be noted that the sensing component of the present invention has a better operating range, and the operating range is that the gate voltage of the sensing component is less than the gate voltage of the sensing π component, so that the magnitude of the drain current changes with the gap size, allowing reading. The output circuit recognizes the difference in charge of the storage capacitor caused by the change in the drain current and defines the position of the touch. Please refer to FIG. 7. FIG. 7 is a schematic view showing another embodiment of the pixel area circuit of the display device of the present invention. As shown in FIG. 7, the source S of the sensing element 108 is connected to a driving line 140' to adjust the bias voltage on the sensing element 108 to make it operate optimally. The second end of the storage capacitor 112 is electrically coupled to the bias electrode 114, and the other end is electrically coupled to the drain D of the sensing element 108. In summary, the present invention provides a method for positioning a display device, wherein the gap between the sensing element and the counter electrode is changed by touch pressing, and the drain current of the sensing element changes due to 12 1361373, thereby changing the storage capacitor. The charge signal can be used to determine the touch position by analyzing the difference between the background signal and the sensing signal. Therefore, the touch method of the present invention can improve the conventional light sensing mode to avoid interference of ambient light. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should fall within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing a touch unit of a conventional display device. 2 is a flow chart of a positioning method of the display device of the present invention. Figure 3 is a circuit diagram showing the pixel region of the display device of the present invention. 4 is a schematic cross-sectional view showing an induction unit of one of the display devices of the present invention. Fig. 5 is a schematic cross-sectional view showing the deformation of the opposite substrate of the sensing unit of the present invention by an external force. Fig. 6 is a graph showing the relationship between the gate voltage and the gate current of the sensing element of the present invention at a fixed drain voltage. Fig. 7 is a schematic view showing another embodiment of the pixel area circuit of the display device of the present invention. [Description of main component symbols] 10 Induction unit 12 Photo sensing element 14 Reading element 16 Black matrix 18 Liquid crystal layer 20 Substrate 22 Counter substrate 24 Opening 13 1361373
100 晝素區域 102 資料線 103 資料線 104 閘極線 105 閘極線 106 開關元件 108 感應元件 110 讀出元件 112 儲存電容 114 偏壓電極 116 言買出線 118 讀出電路 122 對向基板 124 對向電極 126 基板 128 閘極絕緣層 130 通道 132 局推雜區域 134 保護層 136 遮光層 138 液晶層 140 驅動線 Clc 液晶電容 Cst 第一儲存電容 dl 第一間隙 d2 第二間隙 D 波極 G 閘極 S 源極 S10 步驟 S20 步驟 S30 步驟 S40 步驟 S50步驟 14100 pixel region 102 data line 103 data line 104 gate line 105 gate line 106 switching element 108 sensing element 110 sensing element 112 storage capacitor 114 biasing electrode 116 buyout line 118 readout circuit 122 counter substrate 124 pair Transistor 126 Substrate 128 Gate insulating layer 130 Channel 132 Office region 134 Protective layer 136 Light shielding layer 138 Liquid crystal layer 140 Driving line Clc Liquid crystal capacitor Cst First storage capacitor dl First gap d2 Second gap D Wave electrode G Gate S source S10 step S20 step S30 step S40 step S50 step 14