201113788 WP9803-C400-0938 31308twf.doc/n 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種觸控顯示面板，且特別是有關於一種電 容式觸控顯示面板。 【先前技術】 電容式觸控顯示面板主要是在其内外側導電層產生均句之電 場，因此當導體(如人類之手指)與之接觸時會產生一微小之電容變 化，進而判斷出按壓處位於面板上的座標。 在實務上，電容式觸控顯示面板中的液晶電容須兼負感測與 顯不二項工作。因此，對—般的觸控顯示面板來說，隨著觸控顯 不面板的錄度的提高，觸控顯示面板賴示^冑往往因脈衝的 饋入效應（feedthrough effect)而造成畫面顯示不良，例如：閃爍 (flick的、串音(crosstalk) ·等問題。因此，如何提高觸控顯示面 板的靈敏度，同日錄細控顯示面板的齡品質，已是觸控顯示 面板在δ史s十上所面臨的一大課題。 、、 【發明内容】 本發明提供-種觸控顯示面板’利用電性連接在第—掃 與儲存元件之_參考電容，來提升觸控顯示面 ^ 兼顧觸控顯示面板的顯示品質。 又Α 本《月提丨種觸控顯示面板，包括—第—掃描線、一 第：儲存7^件、—關單元、—第—開關與—參考電容。 描線與第—掃描線用以在一晝面週期内依序傳送一第一閘 201113788 WP9803-C400-Q938 31308twf.doc/n -第二閘極脈衝。儲存元件用以儲 據觸控顯示面板被按壓的狀態_整畫素 旦’、電壓’並依201113788 WP9803-C400-0938 31308twf.doc/n VI. Description of the Invention: [Technical Field] The present invention relates to a touch display panel, and more particularly to a capacitive touch display panel. [Prior Art] The capacitive touch display panel mainly generates a uniform electric field in the inner and outer conductive layers, so when a conductor (such as a human finger) comes into contact with it, a slight capacitance change is generated, thereby judging the pressing place. The coordinates on the panel. In practice, the liquid crystal capacitors in the capacitive touch display panel must have both negative sensing and display. Therefore, for a general touch display panel, as the touch display panel is improved in the touch display panel, the touch display panel often causes a poor display due to a pulse feedthrough effect. For example: flicker (flick, crosstalk), etc. Therefore, how to improve the sensitivity of the touch display panel, the age quality of the same control panel is the same as the touch display panel on the δ history A major problem faced by the present invention is that the touch display panel is electrically connected to the reference capacitor of the first scanning and storage component to improve the touch display surface and the touch display. The display quality of the panel. Also Α This month's touch display panel, including - the first - scan line, one: storage 7^, - off unit, - the first switch and - reference capacitance. The scan line is used to sequentially transmit a first gate 201113788 WP9803-C400-Q938 31308twf.doc/n - a second gate pulse in a meander period. The storage element is used to store the state in which the touch display panel is pressed. Whole picture Sudan', Voltage
用以在接收到第一閘極脈衝時，依據晝素;壓的二】關單元 =訊號。第一開關用以在接收到第二 :產J 料電壓至齡元件，以更新晝素電壓。參考 接第一掃描線，參考電容㈣二端電性連絲存元件。^電性連 在本發明之-實施m，上述之關單元包括—第 其中’第二開關具有一第一端、一第二端與一控制端。第二 的第一端電性連接參考電容的第— 幵 拯夂去一μ *端帛—開關的控制端電性連 接參考电谷的苐二端。其中，當第二開關接收到第—問極脈知， 第二開關導通’並依據晝素電壓的大小而透過其第二端產生〜了 測電流，以作為感測訊號。 践 基於上述，本發明於第一掃描線與儲存元件之間争接—參考 電谷。藉此，隨著第—閘極脈衝的產生，參考電容所形成的饋入 效應將拉升畫素電壓。此外，隨著第二閘極脈衝的產生，晝紊電 壓將馬上被更新至另一資料電壓。換而言之，參考電容所形成的 饋入效應對畫素電壓所造成的影響將僅維持短暫的時間。因此， 與習知技術相較之下，本發明之觸控顯示面板不僅具有較佳的靈 敏度還可兼顧面板的顯示品質。 為讓本發明之上述特徵和優點能更明顯易懂，下文特舉實施 例’並配合所附圖式作詳細說明如下。 【實施方式】 在以下說明中，為呈現對本發明之說明的一貫性，故在不同 201113788 WP9803-C400-0938 31308twf.doc/n 的實施例中’若有功能與結構相同或相似的元件會用相同的元件 符號與名稱。 [第一實施例] ® 1繪示為依據本發明第-實施例之觸控顯示面板的示意 圖。參照圖i，觸控顯示面板KK)包括一第—掃描線GL"、一第 二掃描線GL12—第-關SW11、-參考電容CREP '—儲存元件 no…開鮮元12〇以及-感測魏130。其中，儲存元件ιι〇 包括一液晶電谷CLC與一儲存電谷CST。開關單元12〇包括一第二 開關sw12。感測電路13〇包括-電流電壓轉換器131= 一比㈣ 132。 〃更進一步來看，第一開關SWll與第二開關sw^自具有— 第一端、-第二端與-控制端。其中，第一開關％的第: 减收-資料電壓Vd 1其第二端電性連接液晶電容心的第— 鳊。此外’第一開關sw„的控制端電性連接第二掃描線证，以 =接收-第二閘極脈衝PU2。再者，液晶電容Clc的第二端電2 接一共同電壓Vc〇M，且儲存電容C鱼液 s 欣日日冤合cLC相互並聯。 -面，參考電容CREF的第—端電性連接第 ，广便接收-第一閘極脈衝PUi ’且參考電容c卿二端 =液晶電容CLC的第一端。此外，第二開_12的第= 電性連接參考電容CREF的第— 端 磲第—開關SW12的控制端電性 接多考電谷CREF的第二端，且第二開關 感測電流I,。 *褐㈣產生— 針對觸㈣示破HK)的操作機制錢，在每— 内，弟一掃描線GL】丨应第二掃少—綠rr ~ /、和為線GL,2都會依序傳送第—間極脈 201113788 WP9803-C400-0938 31308twf.doc/n 衝PUA第二閘極脈衝PU2。藉此，當參考電容c卿接收到第— 閘極脈衝PUl時，原先儲存在儲存元件11〇的畫素電壓％，也就 是在上-晝面週期中資科線DL所傳送的詩糕％㈣，會因 參考電容CREF卿朗饋人效應*被拉升，且拉升後的晝素電壓 VP如式（1)所示： cIt is used to receive the first gate pulse, according to the element; The first switch is configured to receive the second: generating a material voltage to the age component to update the pixel voltage. Refer to the first scan line, reference capacitor (four) two-terminal electrical connection device. Electrically connected to the present invention, the above-described shut-off unit includes - the second of which has a first end, a second end and a control end. The second first end is electrically connected to the first end of the reference capacitor, and the control end of the switch is electrically connected to the second end of the reference electric valley. Wherein, when the second switch receives the first polarity, the second switch is turned on and generates a current through the second end according to the magnitude of the voltage of the pixel as a sensing signal. Based on the above, the present invention contends between the first scan line and the storage element - reference to the valley. Thereby, as the first gate pulse is generated, the feed effect formed by the reference capacitor will pull up the pixel voltage. In addition, as the second gate pulse is generated, the 昼 电 voltage will be immediately updated to another data voltage. In other words, the effect of the feed effect of the reference capacitor on the pixel voltage will only last for a short period of time. Therefore, compared with the prior art, the touch display panel of the present invention not only has better sensitivity but also achieves the display quality of the panel. The above described features and advantages of the present invention will be more apparent from the following description. [Embodiment] In the following description, in order to present the consistency of the description of the present invention, in the embodiment of different 201113788 WP9803-C400-0938 31308twf.doc/n, if a component having the same function or structure is used, The same component symbol and name. [First Embodiment] ® 1 is a schematic view of a touch display panel according to a first embodiment of the present invention. Referring to FIG. 1, the touch display panel KK) includes a first scan line GL", a second scan line GL12-first-off SW11, a reference capacitor CREP'-storage element no...12- and sense-sensing Wei 130. Wherein, the storage component ιι includes a liquid crystal valley CLC and a storage valley CST. The switch unit 12A includes a second switch sw12. The sensing circuit 13A includes a current-to-voltage converter 131 = a ratio (four) 132. Further, the first switch SW11 and the second switch sw^ have a first end, a second end, and a - control end. The first switch % of the first: the reduced-data voltage Vd 1 and the second end thereof is electrically connected to the first 鳊 of the liquid crystal capacitor core. In addition, the control terminal of the first switch sw is electrically connected to the second scan line to receive the second gate pulse PU2. Further, the second end of the liquid crystal capacitor Clc is electrically connected to a common voltage Vc〇M, And the storage capacitor C fish liquid s Xin Ri Ri CLC parallel with each other. - Surface, reference capacitor CREF the first end of the electrical connection, the wide receiver - the first gate pulse PUi ' and the reference capacitor c Qing two end = The first end of the liquid crystal capacitor CLC. In addition, the second end of the second opening _12 of the first electrical connection reference capacitor CREF is electrically connected to the second end of the multi-test valley CREF, and The second switch senses the current I, * brown (four) produces - the operating mechanism for the touch (four) shows HK), in each -, the brother scan line GL] 丨 should be the second sweep less - green rr ~ /, and For the line GL, 2 will sequentially transmit the first-to-pole pulse 201113788 WP9803-C400-0938 31308twf.doc/n to punch the PUA second gate pulse PU2. Thereby, when the reference capacitor c receives the first-gate pulse PU1 At the time, the pixel voltage % originally stored in the storage element 11〇, that is, the % of the poems transmitted by the Zike Line DL in the upper-kneading period, will Reference capacitor CREF * Qing Long fed human effector is pulled, and the formula (1) day after the pixel voltage VP pulled formula: c
r_I REF_N CST + CLC + CREF 式⑴ 其中’△乂亂為第一閘極脈衝PUl之最高位準與最低位準的電壓差。 值得注意的是，第一開極脈衝卩认之最高與最低位準為極性 相反的兩電壓準位，例如:+ 15伏特與_1〇伏特。因此，為了避免第 二開關SWn永遠處在導通(turn on)的狀態，感測電路n〇會將第 二開關swlz的第二端维持在等於第一閘極脈衝PUi之最低位準的 情況下，例如：_10伏特。藉此，當第二開關3评12接收到第一閘極 脈衝卩巧時，第二開關SWl；2才會導通，並依據晝素電壓％的大 小而據以產生感測電流L。其中，感測電流h為開關單元12〇所 產生的一感測訊號。相對地，感測電路13〇會接收感測電流L， 並透過電流電壓轉換器131而將感測電流h轉換為一比對電壓 Vi。之後，比較器132將比對電壓乂丨與一參考電壓VREF進行比較， 並依據比較結果而決定是否產生一觸控訊號Stu。 隨著第一閘極脈衝PU!的結束，第二掃描線GLU將緊接著傳 送第二閘極脈衝PU2。藉此，當第一開關SWn接收到第二閘極脈 衝PU2時’第一開關sw"將導通其第一端與第二端，進而致使儲 存元件110接收到在目前畫面週期中資料線DL所傳送的資料電壓 VD(i) °此時，晝素電壓Vp將被更新至資料電壓vD(i)。 值得一提的是，當觸控顯示面板1〇〇被觸碰時’液晶電容Clc 201113788 WP9803-C400-0938 31308twf.doc/n 的電容值將變大，進而調整晝素電壓VP的大小。其中，由於參考 電容CREF所形成的饋入效應會大幅地提升畫素電壓vP，因此相對 於畫素電壓Vp而生成的感測電流II也會產生大幅度的變動，進而 提升觸控顯示面板100的靈敏度。此外，參考電容cREF所形成的 饋入效應並不會影響到觸控顯示面板100的顯示品質。 主要的原因在於’第一閘極脈衝卩认與第二閘極脈衝PU2是 在一晝面週期内依序被產生的。藉此，隨著第一閘極脈衝PUl的 產生’晝素電壓VP會因應參考電容CREF所形成的饋入效應而被大 幅地被提升。但在下一時刻’晝素電壓Vp會隨著第二閘極脈衝PU2 的產生而馬上被更新至另一資料電壓。換而言之，參考電容Cref 所形成的饋入效應對畫素電壓Vp所造成的影響僅維持短暫的時 間’因此不會影響到觸控顯示面板10〇的顯示品質。 [第二實施例] 圖2繪示為依據本發明第二實施例之觸控顯示面板的示意 圖。參照圖2,第二實施例與第一實施例的主要差異在於，觸控顯 示面板200中開關單元210與感測電路220的内部架構。 具體§之，在第二實施例中，開關單元21〇包括一第二開關 SW2其中，第—開關SW2的第一端電性連接參考電容cREF的第 一鈿，且第二開關SW2的控制端電性連接參考電容cREF的第一 端错此‘苐—開關SW2接收到第一閘極脈衝put時’其將導 通並將畫素電I Vp從其第—端傳送至其第二端。此時，第二開關 SW2的第二端將據以產生—感測《 V2。其t，感測電壓v2為開 關單元21 〇所產生的一感測訊號。此外，感測電路220僅包括一 比較器221。藉此，感測電路22〇會透過比較器π〗將感測電壓 201113788 WP9803-C400-0938 31308twf.doc/n V2與一參考電壓VREF進行比較’並依據比較結果而決定是否產生 一觸控訊號STU。 另一方面，與第一實施例相似的，參考電容CREF電性連接在 第一掃描線GLu與儲存元件110之間。藉此，隨著第一閘極脈衝 PUi的產生，畫素電壓VP會因應參考電容cREF所形成的饋入效應 而大幅地被提升。但在下一時刻，畫素電壓Vp會隨著第二閘極脈 衝PU2的產生而馬上被更新至另一資料電壓。因此，參考電容cREF 所產生的饋入效應對畫素電壓Vp所造成的影響，不僅可以提升觸 控顯示面板200的靈敏度，且不會影響觸控顯示面板2〇〇的顯示 品質。至於觸控顯示面板200的細部架構已包含在第一實施例中， 故在此不予贅述。 [第三實施例] 圖3繪示為依據本發明第三實施例之觸控顯示面板的示意 圖。參照圖3，第三實施例與第一實施例的主要差異在於，觸控顯 示面板300中開關單元310的内部架構。 具體言之，在第三實施例中，開關單元310包括一第二開關 SW3與一轉換元件311。其中，第二開關sw3的第一端電性連接 參考電容CREF的第二端，且第二開關gw3的控制端電性連接參考 電容CREF的第一端。此外，轉換元件311由—n型電晶體 所構成。其中，N型電晶體MN3的汲極端用以接收一電源電壓 VDD ’ N型電晶體的閘極端電性連接第二開關SW3的第二端， N型電晶體MN3的源極端用以產生感測電流^。 藉此，當第二開關SW3接收到第一閘極脈衝pUi時，其將導 通並將晝素電壓VP從其第一端傳送至其第二端。此時，第二開關 201113788 WP9803-C400-0938 31308twf.doc/n SW3的第二端將據以產生一感測電壓乂广另—方面，轉換元件3ΐι ^將感測電壓V3轉換為一感測電流j i。其中，感測電流j i為開關 單元310所產生的一感測訊號。再者，感測電路Go將可參照感 測訊號而決定是否產生一觸控訊號STU。 另一方面，與第一實施例相似的，參考電容CreF電性連接在 第-掃描、線GL"與铸存元件11〇之間。藉此，隨著第一間極脈衝 的產生’晝素電壓Vp會因應參考電容c咖所形成的饋入效應 • ，而大幅地被提升。但在下一時刻，晝素電壓VP會隨著第二閘紐r_I REF_N CST + CLC + CREF Equation (1) where '△ is the voltage difference between the highest level and the lowest level of the first gate pulse PU1. It is worth noting that the highest and lowest levels of the first open-circuit pulse are two voltage levels opposite to the polarity, such as +15 volts and _1 volts. Therefore, in order to prevent the second switch SWn from being in a turn-on state forever, the sensing circuit n〇 maintains the second end of the second switch swlz at a level equal to the lowest level of the first gate pulse PUi. For example: _10 volts. Thereby, when the second switch 3 evaluates 12 to receive the first gate pulse, the second switch SW1; 2 is turned on, and the sensing current L is generated according to the size of the pixel voltage %. The sensing current h is a sensing signal generated by the switching unit 12A. In contrast, the sensing circuit 13A receives the sensing current L and transmits the sensing current h to a comparison voltage Vi through the current-voltage converter 131. Then, the comparator 132 compares the comparison voltage 乂丨 with a reference voltage VREF, and determines whether to generate a touch signal Stu according to the comparison result. With the end of the first gate pulse PU!, the second scan line GLU will immediately transmit the second gate pulse PU2. Thereby, when the first switch SWn receives the second gate pulse PU2, the 'first switch sw" will turn on its first end and the second end, thereby causing the storage element 110 to receive the data line DL in the current picture period. The transmitted data voltage VD(i) ° At this time, the pixel voltage Vp will be updated to the data voltage vD(i). It is worth mentioning that when the touch display panel 1 is touched, the capacitance value of the liquid crystal capacitor Clc 201113788 WP9803-C400-0938 31308twf.doc/n will become larger, thereby adjusting the size of the pixel voltage VP. Because the feeding effect formed by the reference capacitor CREF greatly increases the pixel voltage vP, the sensing current II generated relative to the pixel voltage Vp also greatly changes, thereby improving the touch display panel 100. Sensitivity. In addition, the feed effect formed by the reference capacitor cREF does not affect the display quality of the touch display panel 100. The main reason is that the 'first gate pulse acknowledgment and the second gate pulse PU2 are sequentially generated in a one-sided period. Thereby, as the first gate pulse PU1 is generated, the pixel voltage VP is greatly increased in response to the feed effect formed by the reference capacitor CREF. However, at the next moment, the pixel voltage Vp is immediately updated to another data voltage as the second gate pulse PU2 is generated. In other words, the effect of the feed effect formed by the reference capacitor Cref on the pixel voltage Vp is maintained for only a short period of time', so that the display quality of the touch display panel 10A is not affected. [Second Embodiment] Fig. 2 is a schematic view showing a touch display panel according to a second embodiment of the present invention. Referring to FIG. 2, the main difference between the second embodiment and the first embodiment is the internal architecture of the switching unit 210 and the sensing circuit 220 in the touch display panel 200. Specifically, in the second embodiment, the switch unit 21A includes a second switch SW2, wherein the first end of the first switch SW2 is electrically connected to the first turn of the reference capacitor cREF, and the control end of the second switch SW2 The first terminal of the electrical connection reference capacitor cREF is incorrectly - 'when the switch SW2 receives the first gate pulse put' it will turn on and transfer the pixel power I Vp from its first end to its second end. At this time, the second end of the second switch SW2 will be generated to sense "V2." The sensing voltage v2 is a sensing signal generated by the switching unit 21 〇. Further, the sensing circuit 220 includes only one comparator 221. Therefore, the sensing circuit 22 比较 compares the sensing voltage 201113788 WP9803-C400-0938 31308twf.doc/n V2 with a reference voltage VREF through the comparator π〗 and determines whether to generate a touch signal according to the comparison result. STU. On the other hand, similarly to the first embodiment, the reference capacitor CREF is electrically connected between the first scanning line GLu and the storage element 110. Thereby, with the generation of the first gate pulse PUi, the pixel voltage VP is greatly boosted in response to the feed effect formed by the reference capacitor cREF. However, at the next moment, the pixel voltage Vp is immediately updated to another data voltage as the second gate pulse PU2 is generated. Therefore, the influence of the feeding effect generated by the reference capacitor cREF on the pixel voltage Vp can not only improve the sensitivity of the touch control panel 200, but also affect the display quality of the touch display panel 2〇〇. The detailed structure of the touch display panel 200 is included in the first embodiment, and thus will not be described herein. [THIRD EMBODIMENT] Fig. 3 is a schematic view showing a touch display panel according to a third embodiment of the present invention. Referring to FIG. 3, the main difference between the third embodiment and the first embodiment is the internal architecture of the switching unit 310 in the touch display panel 300. Specifically, in the third embodiment, the switch unit 310 includes a second switch SW3 and a conversion element 311. The first end of the second switch sw3 is electrically connected to the second end of the reference capacitor CREF, and the control end of the second switch gw3 is electrically connected to the first end of the reference capacitor CREF. Further, the conversion element 311 is composed of an -n type transistor. The 汲 terminal of the N-type transistor MN3 is configured to receive a power supply voltage VDD'. The gate terminal of the N-type transistor is electrically connected to the second end of the second switch SW3, and the source terminal of the N-type transistor MN3 is used to generate the sensing. Current ^. Thereby, when the second switch SW3 receives the first gate pulse pUi, it will turn on and transfer the pixel voltage VP from its first end to its second end. At this time, the second end of the second switch 201113788 WP9803-C400-0938 31308twf.doc/n SW3 will generate a sensing voltage, and the conversion element 3ΐ^ converts the sensing voltage V3 into a sensing. Current ji. The sensing current j i is a sensing signal generated by the switching unit 310. Furthermore, the sensing circuit Go can determine whether to generate a touch signal STU by referring to the sensing signal. On the other hand, similarly to the first embodiment, the reference capacitor CreF is electrically connected between the first scan, the line GL" and the casting element 11?. Thereby, as the first interpole pulse is generated, the pixel voltage Vp is greatly increased in response to the feed effect formed by the reference capacitor C. But at the next moment, the Alizarin Voltage VP will follow the second gate.
衝叫的產生而馬上被更新至另-資料電壓。因此，參考電容CREF 所產生的饋入效應對畫素電壓VP所造成的影響，不僅可以提升觸 控頁π面板300的靈敏度，且不會影響觸控顯示面板獅的顯示 。口質。至於驗顯示面板·的細部架構已包含在上述各實施例 中，故在此不予贅述。 [第四貫施例] 圖4繪示為依據本發明第四實施例之觸控顯示面板的示意 _ °參照圖4’第四實施例與第-實施例的主要差異在於，觸控顯 • 示面板4〇〇中開關單元410的内部架構。 具體言之’在第四實施例中，開關單元410包括-第二開關 挪4與-轉換元件411。其中，第二開關…的第—端電性連接 參^電容c二的第二端’且第二開關SW4的控制端電性連接參考 電谷CREF的第端。此外，轉換元件411由一 n型電晶體娜* 斤構成其巾電晶體Μ%的汲極端電性連接第一掃描線 GLn，N型電晶體MN4的閘極端電性連接第二開關sw4的第二 端’ N型電晶體Mn4的源極端用以產生感測電流^。 201113788 WP9803-C400-0938 31308twf.doc/n 藉此，當第二開關SW4接收到第一閘極脈衝pUi時，其將導 通並將晝素電壓vP從其第一端傳送至其第二端。此時，第^開關 SW4的第二端將據以產生一感測電壓V4。另—方面，轉換元件411 會將感測電壓v4轉換為-感測電流L。其中，感測電流h為開關 單元410所產生的一感測訊號。相對地，感測電路13〇將可參照 感測訊號而決定是否產生一觸控訊號Stu。 另一方面，與第一實施例相似的，參考電容CREF電性連接在 第-掃描線GLU與儲存元件110之間。藉此，隨著第一閉極脈衝 叫的產生，畫素電壓VP會因應參考電容％所形成的饋入效應 而大幅地被提升。但在下-_，晝素電壓Vp會隨著第二問極脈 衝PU2的產生而馬上被更新至另一資料電壓。因此，參考電容c服 所產生的饋入效應對畫素電壓Vp所造成的影響，不僅可以提升觸 控顯示面板4GG的靈敏度’且不會影響觸控顯示面板彻的顯示 品質。至於觸控顯示面板4GG的細部架構已包含在上述各實施例 中，故在此不予費述。 綜上所述，本發明於第一掃描線與儲存元件之間串接一參考 電容。藉此’當第-閘極脈衝透㈣_掃描線傳送至參考電容時， 畫素電壓將隨著參考電容卿成的饋人效應而被拉升^此外，隨 著第二閘極脈衝的產生，畫素電壓將馬上被更新至另一資料電 壓。藉此，參考電容所形成的饋入效應對畫素電壓所造成的影響 將僅維持短暫的時間。如此-來’參考電容所形成的饋入效應不 僅可以提升觸控顯TF面板的靈敏度，且不會影響觸控顯示面板的 顯示品質。 雖然本發明已以實施例揭露如上，然其並非用以限定本發 201113788 WP9803-C400-0938 31308twf.doc/n 明，任何所屬技術領域中具有通常知識者，在不脫離本發明之精 神和範圍内，當可作些許之更動與潤飾，故本發明之保護範圍當 視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 圖1繪示本發明第一實施例之觸控顯示面板的示意圖。 圖2繪示本發明第二實施例之觸控顯示面板的示意圖。 圖3繪示本發明第三實施例之觸控顯示面板的示意圖。 圖4繪示本發明第四實施例之觸控顯示面板的示意圖。 【主要元件符號說明】 100、200、300、400 :觸控顯示面板 GLu :第一掃描線 GLn :第二掃描線 :第一開關 Cref :參考電容 :儲存元件 CLC :液晶電容 CST :儲存電容 120、210、310、41〇 :開關單元 sw12、sw2、sw3、sw4:第二開關 130、220 :感測電路131 :電流電壓轉換器 132、221 :比較器 PU2 :第二閘極脈衝 VP :晝素電壓 Vi :比對電壓 Ιι :感測電流 311、411 :轉換元件 PUi :第一閘極脈衝 VD :資料電堡 Vcmn :共同電壓 Vref :參考電壓 V2、V3、·感测電壓 _3 ' MN4 : N型電晶體 11The generation of the punch is immediately updated to the other-data voltage. Therefore, the influence of the feeding effect generated by the reference capacitor CREF on the pixel voltage VP can not only improve the sensitivity of the touch panel π panel 300, but also does not affect the display of the touch display panel lion. Oral quality. The detailed structure of the display panel is included in the above embodiments, and therefore will not be described herein. [Fourth Embodiment] FIG. 4 is a schematic diagram of a touch display panel according to a fourth embodiment of the present invention. Referring to FIG. 4', the main difference between the fourth embodiment and the first embodiment is that the touch display is The internal structure of the switch unit 410 in the display panel 4A. Specifically, in the fourth embodiment, the switching unit 410 includes a second switching element 4 and a conversion element 411. The first end of the second switch is electrically connected to the second end of the capacitor c2 and the control end of the second switch SW4 is electrically connected to the first end of the reference valley CREF. In addition, the conversion element 411 is composed of an n-type transistor, and the 电% of the device is electrically connected to the first scan line GLn. The gate of the N-type transistor MN4 is electrically connected to the second switch sw4. The source terminal of the two-terminal 'N-type transistor Mn4 is used to generate a sensing current^. 201113788 WP9803-C400-0938 31308twf.doc/n Thereby, when the second switch SW4 receives the first gate pulse pUi, it will conduct and transfer the pixel voltage vP from its first end to its second end. At this time, the second end of the ^ switch SW4 will generate a sensing voltage V4. On the other hand, the conversion element 411 converts the sense voltage v4 into a sense current L. The sensing current h is a sensing signal generated by the switching unit 410. In contrast, the sensing circuit 13 〇 can determine whether to generate a touch signal Stu by referring to the sensing signal. On the other hand, similarly to the first embodiment, the reference capacitor CREF is electrically connected between the first scanning line GLU and the storage element 110. Thereby, as the first closed-pole pulse is generated, the pixel voltage VP is greatly increased in response to the feed effect formed by the reference capacitance %. However, in the lower -_, the pixel voltage Vp is immediately updated to another data voltage as the second polarity pulse PU2 is generated. Therefore, the influence of the feeding effect generated by the reference capacitor c on the pixel voltage Vp can not only improve the sensitivity of the touch display panel 4GG but also does not affect the overall display quality of the touch display panel. The detailed structure of the touch display panel 4GG is included in the above embodiments, and therefore will not be described herein. In summary, the present invention serially connects a reference capacitor between the first scan line and the storage element. Therefore, when the first-gate pulse through (four)_ scan line is transmitted to the reference capacitor, the pixel voltage will be pulled up with the reference effect of the reference capacitor. In addition, with the generation of the second gate pulse The pixel voltage will be immediately updated to another data voltage. Thereby, the effect of the feed effect formed by the reference capacitor on the pixel voltage will only last for a short time. The feed effect formed by the reference capacitor can not only improve the sensitivity of the touch display TF panel, but also does not affect the display quality of the touch display panel. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention is not limited to the spirit and scope of the present invention without departing from the spirit and scope of the present invention. In the meantime, the scope of protection of the present invention is subject to the definition of the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a touch display panel according to a first embodiment of the present invention. 2 is a schematic view of a touch display panel according to a second embodiment of the present invention. 3 is a schematic diagram of a touch display panel according to a third embodiment of the present invention. 4 is a schematic diagram of a touch display panel according to a fourth embodiment of the present invention. [Main component symbol description] 100, 200, 300, 400: touch display panel GLu: first scan line GLn: second scan line: first switch Cref: reference capacitor: storage element CLC: liquid crystal capacitor CST: storage capacitor 120 , 210, 310, 41 〇: switching unit sw12, sw2, sw3, sw4: second switch 130, 220: sensing circuit 131: current voltage converter 132, 221: comparator PU2: second gate pulse VP: 昼Prime voltage Vi: comparison voltage Ιι: sense current 311, 411: conversion element PUi: first gate pulse VD: data electric castle Vcmn: common voltage Vref: reference voltage V2, V3, · sense voltage_3 ' MN4 : N-type transistor 11