201128490 -----143 33513twf.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 〜種光學式觸控顯示面板。 【先前技術】 觸控面板依照其感測方式的不同大致上可區分為電 随式觸控面板、電容式觸控面板、光學式觸控面板、聲波 式觸控面板以及電磁式觸控面板。由於光學式觸控面板的 觸控機制適合應用在大尺寸之顯示面板中，因此，大尺寸 顯示面板的觸控功能多半是透過光學觸控機制來達成。目 前的光學式觸控顯示面板多半採用紅外光作為光源，並利 用互補金氧半導體光感測器（CMOS optical sensor)來感 測紅外光以推算出觸碰點的位置。在習知技術中，紅外光 在對應於顯示面板邊緣處的強度通常會較弱—些，因此去 使用者觸碰顯示面板邊緣處時，互補金氧半導體光减測号 所感測到的觸控訊號強度較弱’導致觸控信號難以被偵測 出，進而造成觸控靈敏度下降。通常，距離互補金氧半導 體光感測器較遠的角落處’其觸控靈敏度較差，其 出現誤動作。 4易 【發明内容】 本發明提供一種光學式觸控顯示面板，具有均句的 測光源。 、 、埶 201128490 AU0911143 33513twf.doc/n _本發月提出_光學式觸控顯示面板，其包括一液晶 顯示：板、至少一感測元件以及一側邊入光式背光源。感 測兀件配Ϊ於液錢示面板的邊緣。側邊人光式背光源配 置於^顯㈣板下^。側紅料#光聽括一導光 板、夕個第-光源、多個第二光源以及多個輔助光源。導 光板位於液:¾齡面板下方，其巾_元件對應於導光板 的其中- m-光源適於提供—可見光至導光板。第 二=源適於提供-非可見光科紘。輔助光源適於提供 :铨：：：見ίΐ導光板’其中輔助光源配置於導光板的 :、：角洛處。虽液晶顯示吨被觸碰時，穿過液晶顯示面 見光與輔助非可見光被散射，且感測 =散射的非可見光與輔助非可見光以推算出觸碰點的t 在本發明之-實關巾，上述之討見光為 光，而這些感測元件包括紅外光感測元件。 、·、外 在本發明之-實施例中，上述之 互補金氧半導體光感測器。 饮】件包括 在本發明之-實施例中，上述之感測元件的數量為2 個，且分別配置於液晶顯示面板的二相鄰角落處。，'、' 第二光源係整合為-第二光條。另外，第―光^原^ 條分別配置於導光板的二對邊上。 ’…、不一九 在本發明之-實施例中，上述之第一 感測元件之間。 些 201128490 -------143 33513twf.doc/n 本發明之—實施例中’上述之_光源被整合為複 U弟二光條，且第三光條配置於導光板之角落處。 在本發明之-實施射，上述之第三光條的延伸方向 戶、質上垂直於第二光條的延伸方向。 在本發明之-實施例中，上述之辅助光源的排列方向 貝貝上垂直於第二光源的排列方向。 在本發明之-實施例中，上述之輔助光源係整合於第 —光條上，且分佈於第二光條的兩端。 在本發日狀—實關巾，±叙獅統的排列方向 實質上平行於第二光源的排列方向。 在本發明之-實施财，上述之可見光為一白光。 除此之外’本發明還提出另—種光學式觸控顯示面 板’其^括-液日日日顯示面板、至少—感測元件以及一側邊 ^光式背光源。感測元件配置於液晶顯示面板的邊緣。側 、入光式$統配置m顯示面板下方。侧邊人光式背 光源包括-導光板、多個第—光源以及多個第二光源。導 光板位於液，騎面板下方，其巾❹彳元件對應於導光板 的其中一角落。第一光源適於提供一可見光至導光板。第 二光，適於提供-非可見光至導光板，其帽近於導光板 的角洛處的部分第二光源所提供之非可見光強度高於其 餘第二光源所提供之非可見光強度12。#液晶顯示面板被 觸碰時，穿職晶顯示面_非可見光被韻，且感測元 件適於感職散射的非可見光與辅助非可見光轉算出觸 碰點的位置。 在本發明之-實施例中，鄰近於導光板的角落處的部 201128490 AU0911143 33513twf.doc/n 分第二光源具有發光效率El，而其餘第二光源具有發光效 率 E2，且 E1>E2。 在本發明之一實施例中’鄰近於導光板的角落處的部 分第二光源具有功率P1，而其餘第二光源具有功率p2， 且 P1>P2 ° 在本發明之一實施例中’鄰近於導光板的角落處的部 分第二光源係整合於部分第一光源中。 鲁 基於上述，本發明之實施例藉由補強導光板角落處非 可見光源的非可見光強度，以提升感測光源在感測區域内 的均勻度（uniformity)，進而提升光學式觸控顯示面板的 靈敏度。 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】 【第一實施例】 圖1為本發明第—實施例中光學式觸控顯示面板的示 思'圖’其中圖1的上方為光學式觸控顯示面板的剖面圖， 而圖1的下方為光學式觸控顯示面板的上視圖。請參照圖 1’本實施例之光學式觸控顯示面板1〇〇包括一液晶顯示面 板110、至少一感測元件以及一側邊入光式背光源 130。感測兀件120配置於液晶顯示面板11〇的邊緣，而側 邊入光式背光源130則配置於液晶顯示面板11〇下方。 側邊入光式背光源13〇包括一導光板132、多個第一 光源I34以及多個第二光源以。導光板m位於液晶顯 7 201128490 八 uuy! il43 33513twf.doc/n 示面板110下方，其中感測元件120對應於導光板132的 其中一角落A。第一光源134適於提供一可見光L1至導 光板132’且可見光L1經過液晶顯示面板11〇的調變後產 生一影像。第二光源136適於提供一非可見光l2至導光 板132。輔助光源138適於提供一輔助非可見光L3至導光 板132，其中輔助光源138配置於導光板132的其餘角落 B、C。 詳細來說，本實施例的部分第一光源134與部分第二 光源136係整合為一第一光條（Hght bar) LB1 ,而其餘的 第一光源134與第二光源136係整合為一第二光條LB2。 第一光條LB1與第二光條:LB2分別配置於導光板132的 二對邊上（即液晶顯示面板110的二對邊上），且第一光 條LB1例如是配置於感測元件12〇之間。另外，辅助光源 138的排列方向實質上垂直於第二光源136的排列方向。 除此之外，如圖1所示，輔助光源丨38被整合為複數 條第三光條LB3 ’其中第三光條LB3的個數例如為2條， 且分別配置於導光板132的角落B、C。另外，第三光條 LB3的延伸方向實質上垂直於第二光條LB2的延伸方向。 值得注意的是’在其他可行的實施例中，第二光條LB2與 第三光條LB3亦可進一步整合為單一光條，以降低組裝工 時以及組裝成本。 在本實施例中，當液晶顯示面板Π0的靠近角落的觸 碰點P1被觸碰時，穿過液晶顯示面板110的部分非可見 光L2(即觸碰點pi附近的非可見光L2)與輔助非可見光 L3會被散射，且感測元件12〇適於感測被散射的非可見光 201128490 AU0911143 33513twf.doc/n L2與輔助非可見光L3以推#出觸碰點pi雜置。詳細來 說，當使用者用手指F觸碰液晶顯示面板11〇時，觸碰點 附近的非可見紅2與辅轉可見光L3#被散射。而這 些被散射的部分非可見紅2與辅助非可見光£3會朝向咸 測元件m傳遞，進而使感測元件12〇能夠推算出觸碰點 P1的位置。值得-提的是，本實施例是透過配置辅助光源 138在導光板132的其餘角落B、c，以改善感測元件12〇 對於距離其較遠之觸碰點的可感測度。 …. 、另一方面，本實施例的液晶顯示面板11〇例如是一穿 透式（transmissive)液晶顯示面板或是一半穿透半反射式 (transflective)液晶顯示面板。如圖i所示，液晶顯示面 板110例如包括兩基板112&與U2b、位於兩基板1123與 112b間的液晶層114以及配置於基板112&上的晝素陣/列 116。而g可見光L1經過液晶顯示面板11〇的液晶層1 μ 與晝素陣列116後會產生一影像。另外，由於穿透式9液晶 顯不面板與半穿透半反射式液晶顯示面板都有一定程度的 透光面積，因此從這些透光面積穿透出的非可見光L2與 辅助非可見光L3能夠用來作為觸控面板的感測光源。 睛繼續參照圖1，本實施例的感測元件12〇的數量例 如為2個，且分別配置於液晶顯示面板11〇的二相鄰角落 處而各個感測元件120可以根據所彳貞測到之非可見光二2 與辅助非可見光L3的入射角來觸碰點Pi的位置。詳細來 5兒，當液晶顯示面板110被觸碰時，觸碰點P1的非可見 光L2與輔助非可見光L3會被散射，進而使感測元件12〇 偵測散射後的非可見光L2與輔助非可見光L3。接著，與 201128490 m*ju^h143 33513twf.doc/n 感測元件120電性連接的觸控訊號讀出電路14〇會根據感 測元件120所傳送的訊號來推算觸碰點的位置。在本 實施例中，可見光L1例如為一白光，非可見光L2例如為 一紅外光，而用以偵測非可見光L2之感測元件12〇則例 如為紅外光感測元件。舉例而言，上述之紅外光感測元件 可為互補金氧半導體光感測器。 整體而言，藉由上述手法，能提升感測光源（亦即本 實施例的非可見光L2與L3)在感測區域内的均勻度，進 而增加光學式觸控顯示面板1〇〇的靈敏度。 【第二實施例】 圖2為本發明第二實施例中光學式觸控顯示面板的示 意圖，其中圖2的上方為光學式觸控顯示面板的剖面圖， 而圖2的下方為光學式觸控顯示面板的上視圖。。本實施 例的光學式觸控顯示面板200與圖1的光學式觸控顯示面 板100類似，惟二者主要差異之處在於：本實施例的辅助 光源138係整合於第二光條LB2上，且分佈於第二光條 LB2的兩端，如區域Ei與E2。除此之外，輔助光源138 的排列方向實質上平行於第二光源136的排列方向。 本實施例藉由將提供非可見光的辅助光源138整合於 第二光條LB2的兩端’以使光學式觸控顯示面板2〇〇能有 均勻的感測光源，進而增加感測元件120對於距離其較遠 之觸碰點P2的光感測度。從另一個角度觀看，本實施例 是利用增加第二光條LB2兩端處之非可見光源的個數，從 而提升感測光源在感測區域内的均勻度，進而增加光學式 201128490 AU0911143 33513twf.doc/n 觸控顯示面板200的靈敏度。 【第三實施例】 圖3為本發明第三實施例中光學式觸控顯示面板的示 意圖，其中圖3的上方為光學式觸控顯示面板的剖面圖， 而圖3的下方為光學式觸控顯示面板的上視圖。。本實施 例的光學式觸控顯示面板300與圖1的光學式觸控顯示面 板100類似，惟二者主要差異之處在於：光學式觸控顯示 面板300採用第二光源236a’不採用圖1中辅助光源I%。 詳細來說’光學式觸控顯示面板300包括多個第二光源 236a、236b。第二光源236a、236b適於提供非可見光L4、 L5至導光板132，其中導光板132是配置於液晶顯示面板 110下方。 在本實施例中，鄰近於導光板132或液晶顯示面板11〇 之角落B、C的部分第二光源236a所提供的非可見光強度 I!咼於其餘第二光源236b所提供的非可見光強度丨2。當液 晶顯示面板110的觸碰點p3被觸碰時，穿過液晶顯示面 板110的非可見光L4與L5被散射，使得感測元件12〇能 感測被散射的非可見光L4、L5以推算出觸碰點P3的位置。 進一步而言，在本實施例中，鄰近於導光板132角落 B、C的部分第二光源236a例如具有發光效率E1，而其餘 第二光源236b例如具有發光效率E2，且£1>£2。因^匕，' 藉由將高發光效率的第二光源236a配置在液晶顯示面板 110的㈣B、C，能夠增加感測元件12()對於距離其較遠 之觸碰點的可❹彳度’進而提升光學式觸錢示面板綱 11 201128490 Λυυν 11143 33513twf.doc/n 的觸控靈敏度。 除此之外’在其他實施例中，也能將高功率的第二光 源配置於液晶顯示面板110的角落B、c來達到相同功效。 舉例來說’鄰近導光板132(或液晶顯示面板11〇)角落B、 C的部分第二光源236a例如具有功率P1，而莫餘第二光 源236b具有功率P2，且ρι>Ρ2。而藉由選取大尺寸的第 一光源236a或以過驅動（over drive)的方式來驅動第二 光源236a便能產生上述之高功率的第二光源236a。 另一方面’在另一實施例中’鄰近於導光板]32或液 H 晶顯不面板110角落B、C的部分第二光源236a還可整合 於部分第一光源134中。詳細來說，鄰近角落B或c之第 一光源134的封裝（package)内還包括第二光源236a，進 而可以使第二光源236a的非可見光強度高於其餘第二光 源236b的非可見光強度。從另一個角度觀看，上述作法類 似於第二實施例利用增加第二光源136的個數以產生均勻 感測光源的作法。 紅上所述，本發明之實施例藉由補強導光板角落處非 可見光源的非可見光強度，以於提升感測光源在感測區域 * 内的均勻度，進而提升光學式觸控顯示面板的觸控靈敏度。 雖然本發明已以實施例揭露如上，然其並非用以限定 本發明，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鄕圍所界定者為準。 【圖式簡單說明】 12 201128490 Auuyni43 33513twf.doc/n 圖1為本發明第一實施例中光學式觸控顯示面板的示 意圖。 圖2為本發明第二實施例中光學式觸控顯示面板的示 意圖。 圖3為本發明第三實施例中光學式觸控顯示面板的示 意圖。 【主要元件符號說明】 100、200、300 :光學式觸控顯示面板 110 .液晶顯不面板 112a、112b :基板 114 :液晶層 116 :晝素陣列 120 :感測元件 130 :側邊入光式背光源 132 :導光板 134 :第一光源 136、236a、236b :第二光源 138 :辅助光源 140 :觸控訊號Ί買出電路 A〜C :角落BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch display panel, and more particularly to an optical touch display panel. [Previous Technology] The touch panel can be roughly classified into an electric touch panel, a capacitive touch panel, an optical touch panel, an acoustic touch panel, and an electromagnetic touch panel according to different sensing methods. Since the touch mechanism of the optical touch panel is suitable for use in a large-sized display panel, the touch function of the large-size display panel is mostly achieved through an optical touch mechanism. Most of the current optical touch display panels use infrared light as a light source, and a complementary CMOS optical sensor is used to sense the infrared light to estimate the position of the touch point. In the prior art, the intensity of the infrared light at the edge corresponding to the display panel is generally weaker, so that when the user touches the edge of the display panel, the touch is sensed by the complementary MOS light minus test number. The weak signal strength makes it difficult for the touch signal to be detected, which in turn causes the touch sensitivity to decrease. Generally, the touch sensitivity is poor at a corner far from the complementary MOS photosensor, and malfunction occurs. [Embodiment] The present invention provides an optical touch display panel having a light source of a uniform sentence. 28 28 埶 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学The sensing element is attached to the edge of the liquid money display panel. The side human light backlight is placed under the ^4 board. The side red material #光听 includes a light guide plate, a first light source, a plurality of second light sources, and a plurality of auxiliary light sources. The light guide plate is located below the liquid: 3⁄4 year old panel, and the towel-element corresponds to the light guide plate where the -m-light source is adapted to provide - visible light to the light guide plate. The second = source is adapted to provide - non-visible light. The auxiliary light source is adapted to provide: 铨::: see ΐ ΐ light guide plate ′ where the auxiliary light source is disposed on the light guide plate: , : corner. When the liquid crystal display is touched, the visible light and the auxiliary non-visible light are scattered through the liquid crystal display surface, and the sensed=scattered non-visible light and the auxiliary non-visible light are used to derive the touch point t. The towel, the above-mentioned light is light, and these sensing elements include infrared light sensing elements. Further, in the embodiment of the present invention, the above-described complementary MOS photosensor. In the embodiment of the present invention, the number of the sensing elements is two, and are respectively disposed at two adjacent corners of the liquid crystal display panel. , ', ' The second light source is integrated into a second light strip. In addition, the first light elements are respectively disposed on two opposite sides of the light guide plate. </ RTI> </ RTI> In the embodiment of the invention, between the first sensing elements described above. In the embodiment of the present invention, the light source is integrated into a double light strip, and the third light strip is disposed at a corner of the light guide plate. In the present invention, the direction in which the third strip is extended is perpendicular to the direction in which the second strip extends. In an embodiment of the invention, the arrangement direction of the auxiliary light sources described above is perpendicular to the arrangement direction of the second light sources. In an embodiment of the invention, the auxiliary light source is integrated on the first light strip and distributed on both ends of the second light strip. In the present-day-day-closed towel, the arrangement direction of the lion's lion is substantially parallel to the arrangement direction of the second light source. In the present invention, the visible light is a white light. In addition, the present invention also proposes another optical touch display panel, which includes a liquid-day display panel, at least a sensing element, and a side-light backlight. The sensing element is disposed at an edge of the liquid crystal display panel. Side, light-input system configuration m display panel below. The side human light back light source includes a light guide plate, a plurality of first light sources, and a plurality of second light sources. The light guide plate is located in the liquid, under the panel, and the frame member corresponds to one corner of the light guide plate. The first light source is adapted to provide a visible light to the light guide plate. The second light is adapted to provide a non-visible light to the light guide plate, and a portion of the second light source having a cap near the corner of the light guide plate provides a non-visible light intensity higher than a non-visible light intensity 12 provided by the second light source. # When the liquid crystal display panel is touched, the wearer's display surface _ non-visible light is rhymed, and the sensing element is adapted to the position of the touch point by the non-visible light and the auxiliary non-visible light for the sensory scattering. In the embodiment of the invention, the portion adjacent to the corner of the light guide plate 201128490 AU0911143 33513twf.doc/n divides the second light source to have luminous efficiency E1, while the remaining second light source has luminous efficiency E2, and E1> E2. In one embodiment of the invention 'a portion of the second source adjacent the corner of the light guide plate has a power P1 and the remaining second source has a power p2, and P1 > P2 ° is adjacent to one of the embodiments of the invention A portion of the second light source at the corner of the light guide plate is integrated into a portion of the first light source. Based on the above, the embodiment of the present invention enhances the uniformity of the sensing light source in the sensing area by reinforcing the non-visible light intensity of the non-visible light source at the corner of the light guide plate, thereby improving the optical touch display panel. Sensitivity. The above described features and advantages of the present invention will become more apparent from the description of the appended claims. [First Embodiment] FIG. 1 is a cross-sectional view showing an optical touch display panel of the optical touch display panel according to a first embodiment of the present invention, wherein FIG. 1 is a cross-sectional view of the optical touch display panel. Below the 1 is a top view of the optical touch display panel. Referring to FIG. 1 ', the optical touch display panel 1 of the present embodiment includes a liquid crystal display panel 110, at least one sensing element, and a side edge-lit backlight 130. The sensing element 120 is disposed on the edge of the liquid crystal display panel 11A, and the side entrance light-emitting backlight 130 is disposed under the liquid crystal display panel 11A. The side entrance light source backlight 13 includes a light guide plate 132, a plurality of first light sources I34, and a plurality of second light sources. The light guide plate m is located below the display panel 110 of the liquid crystal display panel, wherein the sensing element 120 corresponds to one corner A of the light guide plate 132. The first light source 134 is adapted to provide a visible light L1 to the light guide plate 132' and the visible light L1 is modulated by the liquid crystal display panel 11 to generate an image. The second light source 136 is adapted to provide a non-visible light 12 to the light guide plate 132. The auxiliary light source 138 is adapted to provide an auxiliary non-visible light L3 to the light guide plate 132, wherein the auxiliary light source 138 is disposed at the remaining corners B, C of the light guide plate 132. In detail, a portion of the first light source 134 and a portion of the second light source 136 of the embodiment are integrated into a first light bar LB1, and the remaining first light source 134 and the second light source 136 are integrated into a first Two light bars LB2. The first strip LB1 and the second strip LB2 are respectively disposed on two opposite sides of the light guide plate 132 (ie, on opposite sides of the liquid crystal display panel 110), and the first strip LB1 is disposed, for example, on the sensing element 12 Between 〇. Further, the arrangement direction of the auxiliary light sources 138 is substantially perpendicular to the arrangement direction of the second light sources 136. In addition, as shown in FIG. 1 , the auxiliary light source 丨 38 is integrated into a plurality of third light strips LB3 ′, wherein the number of the third light strips LB3 is, for example, two, and are respectively disposed at the corner B of the light guide plate 132. , C. Further, the extending direction of the third strip LB3 is substantially perpendicular to the extending direction of the second strip LB2. It should be noted that in other feasible embodiments, the second strip LB2 and the third strip LB3 may be further integrated into a single strip to reduce assembly man-hours and assembly costs. In the present embodiment, when the touch point P1 near the corner of the liquid crystal display panel Π0 is touched, part of the non-visible light L2 passing through the liquid crystal display panel 110 (ie, the non-visible light L2 near the touch point pi) and the auxiliary non- The visible light L3 is scattered, and the sensing element 12 is adapted to sense the scattered non-visible light 201128490 AU0911143 33513twf.doc/n L2 and the auxiliary non-visible light L3 to push the touch point pi. In detail, when the user touches the liquid crystal display panel 11 with the finger F, the non-visible red 2 and the auxiliary-transition visible light L3# near the touch point are scattered. The scattered portions of the non-visible red 2 and the auxiliary non-visible light £3 are transmitted toward the salt detecting element m, thereby enabling the sensing element 12A to estimate the position of the touch point P1. It is worth mentioning that this embodiment is to configure the auxiliary light source 138 at the remaining corners B, c of the light guide plate 132 to improve the sensibility of the sensing element 12 触 to the touch point farther away from it. In other words, the liquid crystal display panel 11 of the present embodiment is, for example, a transmissive liquid crystal display panel or a transflective liquid crystal display panel. As shown in Fig. 1, the liquid crystal display panel 110 includes, for example, two substrates 112& and U2b, a liquid crystal layer 114 between the two substrates 1123 and 112b, and a pixel array/column 116 disposed on the substrate 112&. The g visible light L1 passes through the liquid crystal layer 1 μ of the liquid crystal display panel 11 and the pixel array 116 to generate an image. In addition, since the transmissive liquid crystal display panel and the transflective liquid crystal display panel have a certain degree of light transmission area, the non-visible light L2 and the auxiliary non-visible light L3 penetrating from the light transmission areas can be used. Used as a sensing light source for the touch panel. Continuing to refer to FIG. 1 , the number of sensing elements 12 本 of the present embodiment is, for example, two, and are respectively disposed at two adjacent corners of the liquid crystal display panel 11 , and the sensing elements 120 can be measured according to the detection. The non-visible light 2 and the incident angle of the auxiliary non-visible light L3 touch the position of the point Pi. In detail, when the liquid crystal display panel 110 is touched, the non-visible light L2 and the auxiliary non-visible light L3 of the touch point P1 are scattered, so that the sensing element 12 detects the scattered non-visible light L2 and the auxiliary non- Visible light L3. Then, the touch signal readout circuit 14 electrically connected to the sensing component 120 of the 201128490 m*ju^h143 33513twf.doc/n device can estimate the position of the touch point according to the signal transmitted by the sensing component 120. In the present embodiment, the visible light L1 is, for example, a white light, the non-visible light L2 is, for example, an infrared light, and the sensing element 12 for detecting the non-visible light L2 is, for example, an infrared light sensing element. For example, the infrared light sensing element described above can be a complementary metal oxide semiconductor light sensor. In general, by the above method, the uniformity of the sensing light source (that is, the non-visible light L2 and L3 of the embodiment) in the sensing region can be improved, thereby increasing the sensitivity of the optical touch display panel. 2 is a schematic view of an optical touch display panel according to a second embodiment of the present invention, wherein the upper part of FIG. 2 is a cross-sectional view of the optical touch display panel, and the lower part of FIG. 2 is an optical touch Control the top view of the display panel. . The optical touch display panel 200 of the present embodiment is similar to the optical touch display panel 100 of FIG. 1 , but the main difference is that the auxiliary light source 138 of the embodiment is integrated on the second light strip LB2. And distributed at both ends of the second light bar LB2, such as the regions Ei and E2. In addition to this, the arrangement direction of the auxiliary light sources 138 is substantially parallel to the arrangement direction of the second light sources 136. In this embodiment, the auxiliary light source 138 providing the non-visible light is integrated into the two ends of the second light strip LB2 to enable the optical touch display panel 2 to have a uniform sensing light source, thereby increasing the sensing element 120. The light sensitivity of the touch point P2 from the farther distance. Viewed from another angle, in this embodiment, the number of non-visible light sources at the two ends of the second light bar LB2 is increased, thereby improving the uniformity of the sensing light source in the sensing region, thereby increasing the optical type 201128490 AU0911143 33513twf. Doc/n Sensitivity of touch display panel 200. 3 is a schematic view of an optical touch display panel according to a third embodiment of the present invention, wherein the upper part of FIG. 3 is a cross-sectional view of the optical touch display panel, and the lower part of FIG. 3 is an optical touch Control the top view of the display panel. . The optical touch display panel 300 of the present embodiment is similar to the optical touch display panel 100 of FIG. 1 , but the main difference between the two is that the optical touch display panel 300 does not adopt the second light source 236 a ′. Medium auxiliary light source I%. In detail, the optical touch display panel 300 includes a plurality of second light sources 236a, 236b. The second light source 236a, 236b is adapted to provide the non-visible light L4, L5 to the light guide plate 132, wherein the light guide plate 132 is disposed under the liquid crystal display panel 110. In this embodiment, the non-visible light intensity I provided by the partial second light source 236a adjacent to the light guide plate 132 or the corners B, C of the liquid crystal display panel 11 is invisible to the non-visible light intensity provided by the remaining second light source 236b. 2. When the touch point p3 of the liquid crystal display panel 110 is touched, the non-visible lights L4 and L5 passing through the liquid crystal display panel 110 are scattered, so that the sensing element 12A can sense the scattered non-visible light L4, L5 to calculate Touch the position of point P3. Further, in the present embodiment, a part of the second light source 236a adjacent to the corners B, C of the light guide plate 132 has, for example, a luminous efficiency E1, and the remaining second light source 236b has, for example, a luminous efficiency E2, and £1 > £2. By arranging the second light source 236a having high luminous efficiency on the (4) B and C of the liquid crystal display panel 110, the sensitivity of the sensing element 12 (for the touch point farther away from it) can be increased' Further, the touch sensitivity of the optical touch panel panel 11 201128490 Λυυν 11143 33513twf.doc/n is improved. In addition, in other embodiments, a high-power second light source can also be disposed at the corners B, c of the liquid crystal display panel 110 to achieve the same effect. For example, a portion of the second light source 236a adjacent to the corners B, C of the light guide plate 132 (or the liquid crystal display panel 11A) has, for example, a power P1, and the second light source 236b has a power P2, and ρι > Ρ2. The high-power second light source 236a can be generated by selecting the large-sized first light source 236a or by driving the second light source 236a in an overdrive manner. On the other hand, in another embodiment, a portion of the second light source 236a adjacent to the light guide plate 32 or the liquid H crystal display panel 110 corners B, C may also be integrated into a portion of the first light source 134. In detail, the second light source 236a is included in the package of the first light source 134 adjacent to the corner B or c, so that the non-visible light intensity of the second light source 236a can be made higher than the non-visible light intensity of the remaining second light source 236b. Viewed from another angle, the above described method is similar to the second embodiment in that the number of second light sources 136 is increased to produce a uniform sensing light source. In the embodiment of the present invention, the non-visible light intensity of the non-visible light source at the corner of the light guide plate is reinforced to improve the uniformity of the sensing light source in the sensing area*, thereby improving the optical touch display panel. Touch sensitivity. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of protection of the present invention is subject to the definition of the attached application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of an optical touch display panel in a first embodiment of the present invention. Figure 2 is a schematic illustration of an optical touch display panel in accordance with a second embodiment of the present invention. Figure 3 is a schematic illustration of an optical touch display panel in accordance with a third embodiment of the present invention. [Main component symbol description] 100, 200, 300: optical touch display panel 110. Liquid crystal display panel 112a, 112b: substrate 114: liquid crystal layer 116: halogen array 120: sensing element 130: side edge light type Backlight 132: Light guide plate 134: First light source 136, 236a, 236b: Second light source 138: Auxiliary light source 140: Touch signal Ί Buy circuit A~C: Corner
El、E2 :區域 L1 :可見光 L2〜L5 :非可見光 13 33513twf.doc/n 201128490 _______143 PI〜P3 :觸碰點 F :手指 LB1 :第一光條 LB2 :第二光條 LB3 :第三光條El, E2: area L1: visible light L2~L5: non-visible light 13 33513twf.doc/n 201128490 _______143 PI~P3: touch point F: finger LB1: first light strip LB2: second light strip LB3: third light strip