201106230 /\υυνυ/【62 32l42twf-友達.doc/e 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(touch_sensing display panel) ’且特別是有關於一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而大致上可區分為 電阻式觸控面板、電容式觸控面板、光學式觸控面板、^ 波式觸控面板以及電磁式觸控面板。由於光學式觸 的觸控機制適合應用在大尺寸之顯示面板中 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。舉例而言，已有製造商將能夠發出紅外光之紅 外光發光二極體(IR_LED)以及互補金氧半導體光感測器整 合為一外掛模組，並將兩個外掛模組組裝於顯示面板的二 角落處。為了讓外掛模組中的互補金氧半導體光感測器能 夠順利地感測出觸碰點的位置，外掛模組仍須搭配能夠反 射紅外光之反射元件(retro_refjector)。值得注意的是，由於 反射元件屬於較為特殊的反射面，其在製作上與—般的反 射片不同’因此反射元件使得製造成本無法進一步降低。 此外’由於外掛模組的厚度厚達3.5毫米(miUimeter)以上， 因此’外掛模組會造成顯示面板的邊框過厚，進而導致產 品的整體外觀不佳。 201106230201106230 /\υυνυ/[62 32l42twf-友达.doc/e VI. Description of the Invention: [Technical Field] The present invention relates to a touch display panel (touch_sensing display panel) and in particular to an optical type Touch display panel. [Previous Technology] The touch panel can be roughly classified into a resistive touch panel, a capacitive touch panel, an optical touch panel, a wave touch panel, and an electromagnetic touch panel according to different sensing methods. . Since the touch mechanism of the optical touch is suitable for use in a large-sized display panel, the touch function of the 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 infrared light. For example, existing manufacturers have integrated infrared light emitting diodes (IR_LEDs) and complementary MOS semiconductor photosensors into one external module, and assembled two external modules into the display panel. The second corner. In order for the complementary MOS sensor in the plug-in module to smoothly sense the position of the touch point, the plug-in module must still be equipped with a reflective element (retro_refjector) capable of reflecting infrared light. It is worth noting that since the reflective element is a relatively special reflective surface, it is different in fabrication from the general reflective sheet. Therefore, the reflective element makes the manufacturing cost impossible to further reduce. In addition, since the thickness of the external module is as thick as 3.5 millimeters (miUimeter) or more, the external module may cause the frame of the display panel to be too thick, resulting in an overall poor appearance of the product. 201106230
Auuyu/丨 62 32142twf-友達.doc/e 除了上述的外掛模組之外，亦有習知技術 Μ68,550)採用陣列排列之紅外光發光二極體^ ^排列之紅外光感取件來感測觸碰點的位置 =需採賴錄量的紅外紐光二鋪 ^ .體以及紅 ^件^此，製造成林料降低。此外，由於紅3 = ^-^以及紅外光_元件的數量取決於顯示面板的乂 板的尺寸越大時，紅外光發光二極 外先感測元件所需之數量便隨之辦加。 【發明内容】 觸控 本發明提供一種具有软 示面板 、’是合式背光源之光學式 本發明提供一種光學式奋 面招、多個感測Μ 物顯示面板，其包括一液晶 顯示面板、夕個馱测元件以 ，〜日日 配置於液晶顯示面板的邊緣，置^^件 源，其中第-第-光源以及:第二光 顯示面板的調變後產生可，光，此可見光經過液晶 見光，當液晶顯示面板被^ ^二光源適於提供一非可 可見光被散射，且感測元件4，、穿過液晶顯不面板的非 推算出觸碰闕位置。、於制被散㈣非可見光以 上述之液晶顯示面板包括一 示面板或一半穿透半反射式 在本發明之一實施例中， 上述之非可見光為一紅外 穿透式(transmissive)液晶黑丨 (transflective)液晶顯示面板 在本發明之一實施例中， 201106230 AU09(m62 32l42twf-友達.doc/e 光，而上述之感測元件包括紅外光感測元件。在—較佳實 施例令，上述之紅外光感測元件包括互補金氣半導體光】 測器。 埶 在本發明之一實施例中，上述之感測元件配置於液晶 顯示面板的二相鄰角落處。 在本發明之一實施例中，上述之整合式背光源為—直 下式背光源。舉例而言，前述之直下式背光源具有—燈箱， 而第一光源以及第二光源配置於燈箱内。 ^目’ 在本發明之一實施例中，上述之整合式背光源為— 邊入光式背光源。舉例而言，前述之直下式背光源具有— 導光板，而導光板具有一第一入光面以及一第二入光面， 第一光源配置於第一入光面旁，且第二光源配置於第二入 光面旁。 在本發明之一實施例中，上述之可見光為一白光。 在本發明之一實施例中，上述之光學式觸控顯示面板 可進一步包括一與該些感測元件電性連接之觸控訊號讀出 電路。 基於上述，由於本發明將光學式觸控顯示面板中的觸 控用光源（light source f0r touch_sensing)以及顯示用光源 (light source f0r displaying)整合於同一個背光源中，因此本 發明可以有效地降低製程本、改善邊框過厚的問題，且無 須使用到反射元件(retro-reflector)。 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。 201106230 ΑΙ/〇9〇7162 32142twf-友達.doc/e 【實施方式】 圖1A為本發明一實施例中光學式觸控顯示面板的剖 面不意圖，而圖1B為圖1A中之光學式觸控顯示面板的上 視示意圖。請參照圖1A與圖1B，.本實施例之光學式觸控 顯示面板100包括一液晶顯示面板多個感測元件 以及一整合式背光源130。感測元件12〇配置於液晶顯示 面板110的邊緣，整合式背光源13〇配置於液晶顯示面板 Π0下方。整合式背光源丨3〇包括一第一光源132以及一 第二光源134，其中第一光源132適於提供一可見光u， 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134適於提供一非可見光L2,當液晶顯示面 板11〇於觸碰點p處被觸碰時，穿過液晶顯示面板11〇的 部分非可見光L2 (即觸碰點p附近的非可見光L2)會被 月欠射，且感測元件120適於感測被散射的非可見光乙2以 推算出觸碰點P的位置。詳言之，當使用者用手指F觸碰 液晶蝻示面板110時，觸碰點P附近的非可見光會被 • 散射，而在這些被散射的部分非可見光U會朝向感測元 件120傳遞，此時，感測元件12〇便能夠推算出觸碰 的位置。 本實施例可以透過承餘晶顯示面板丨1G的機 來承載感測元件120。此外，感測元件120在設置時^ 下表面可略低於液晶顯示面板11〇的外表面’以進丄并^文 善習知所面臨之邊框厚度過厚的問題。 / 在本實施例中，液晶顯示面板110例如是一穿透式 201106230 Auuyuvib2 32142twf-友達.doc/e (tl.anSmiSSiVe)液晶顯示面板或是一半穿透半反射式 ai：anSfleetlveMs%顯—板。由於穿透式液晶顯示 及半穿透半反射歧㈣和板都财-練度的透光面 ，，因此從这些透光面積穿透出之非可見光L2可 為觸控面板之光源。 β —從圖1B可知’感測元件12〇配置於液晶顯示面板⑽ 的^目鄰㈣處，而各個感測元件12()可以根據所侧到 之非可見光L2的人射角來觸碰點ρ的位置。詳言之 各個感測元件12〇彳貞_彳被散射後_可見光L2時，应 ^個感測元件w電性連接的觸控訊·出電路c根 據感測元件i2G所傳送的訊絲推算觸碰點p的切確位 在本實施例中，非可見光L2可為一紅外光，而用以 ^測非可見光L2之感測元件12()則為紅外光感測元件。 +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。 在本實施例中，整合式背光源13〇中的第一光源132 例如為白光發光二極體或其他適於提供可見光L1之發光 疋件，而第二光源134例如為紅外光發光二極體(ir_led 或其他適於提供非可見光L2之發光元件。在一較佳實施 例中，非可見光L2的波長例如是介於乃〇奈米至1Q00太 米之間。 $ 圖3為整合式背光源所發出的光線（包括可見光及非 可見光）經過液晶顯示面板之後之頻譜。請參照圖1Α、圖 以及圖3，由於本實施例之液晶顯示面板包括液晶盒(LC cell)以及貼附於液晶盒表面上的偏光片，而液晶盒具有彩 201106230 ALMjyu / i62 32142twf-友達.doc/e 色濾光膜（紅色、綠色、藍色彩色濾光膜），因此整合式 背光源130中的第一光源132所提供的可見光L1在經過 彩色濾光膜及偏光片之後，會產生紅光、綠光、藍光之頻 譜，而合式背光源130中的第二光源134所提供的非可見 光L2在經過彩色濾光膜及偏光片之後，會產生波長介於 750奈米至1000奈米之間的紅外光頻譜。從圖3可知，非 可見光L2 (紅外光）之穿透率不會受到液晶顯示面板12〇Auuyu/丨62 32142twf-友达.doc/e In addition to the above-mentioned plug-in modules, there are also conventional techniques Μ68, 550) using arrays of infrared light-emitting diodes arranged in an infrared light-sensing device. The position of the touch point = the infrared ray 2 shop that needs to be recorded. The body and the red piece ^, this is reduced to the forest material. In addition, since the number of red 3 = ^-^ and infrared light_components depends on the size of the panel of the display panel, the amount required for the infrared light-emitting diode external sensing element is increased. SUMMARY OF THE INVENTION The present invention provides an optical type having a soft display panel and a 'closed backlight. The present invention provides an optical touch panel, a plurality of sensing artifact display panels, including a liquid crystal display panel, and a The detecting component is disposed on the edge of the liquid crystal display panel, and the device source is arranged, wherein the first-first light source and the second light display panel are modulated to generate light, and the visible light passes through the liquid crystal. Light, when the liquid crystal display panel is adapted to provide a non-visible visible light is scattered, and the sensing element 4, through the liquid crystal display panel, non-inferential touch 阙 position. In the embodiment of the present invention, the non-visible light is an infrared transmissive liquid crystal black enamel. The liquid crystal display panel comprises a display panel or a transflective liquid crystal display panel. (transflective) liquid crystal display panel In one embodiment of the present invention, 201106230 AU09 (m62 32l42twf- AUO.doc/e light, and the above sensing element includes an infrared light sensing element. In the preferred embodiment, the above The infrared light sensing element comprises a complementary gold-gas semiconductor light detector. In one embodiment of the invention, the sensing element is disposed at two adjacent corners of the liquid crystal display panel. In the above, the integrated backlight is a direct-lit backlight. For example, the aforementioned direct-type backlight has a light box, and the first light source and the second light source are disposed in the light box. In an embodiment, the integrated backlight is an edge-lit backlight. For example, the direct-type backlight has a light guide plate, and the light guide plate has a first light-incident surface. And a second light incident surface, the first light source is disposed beside the first light incident surface, and the second light source is disposed beside the second light incident surface. In an embodiment of the invention, the visible light is a white light. In one embodiment of the present invention, the optical touch display panel may further include a touch signal readout circuit electrically connected to the sensing elements. Based on the above, the optical touch display panel of the present invention The light source f0r touch_sensing and the light source f0r displaying are integrated into the same backlight, so the invention can effectively reduce the process and improve the over-border of the frame without using In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following embodiments are described in detail below with reference to the accompanying drawings. 201106230 ΑΙ/〇9〇7162 32142twf- 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 1A and 1B, the optical touch display panel 100 of the present embodiment includes a plurality of sensing elements of a liquid crystal display panel and an integrated backlight 130. The sensing elements 12 are disposed on the liquid crystal. The integrated backlight 13 is disposed under the liquid crystal display panel 。0. The integrated backlight 〇3〇 includes a first light source 132 and a second light source 134, wherein the first light source 132 is adapted to provide a visible light. u, and the visible light L1 is modulated by the liquid crystal display panel 11 to generate an image. The second light source 134 is adapted to provide a non-visible light L2. When the liquid crystal display panel 11 is touched at the touch point p, a portion of the non-visible light L2 passing through the liquid crystal display panel 11 (ie, a non-touch point near the point p) The visible light L2) is undershot, and the sensing element 120 is adapted to sense the scattered non-visible light B2 to derive the position of the touch point P. In detail, when the user touches the liquid crystal display panel 110 with the finger F, the non-visible light near the touch point P is scattered, and the scattered non-visible light U is transmitted toward the sensing element 120. At this time, the sensing element 12 can estimate the position of the touch. In this embodiment, the sensing element 120 can be carried through the machine of the residual crystal display panel 丨1G. In addition, the sensing element 120 may be slightly lower than the outer surface of the liquid crystal display panel 11 when the sensing element 120 is disposed, and the problem that the thickness of the frame faced is too thick is known. In the present embodiment, the liquid crystal display panel 110 is, for example, a transmissive 201106230 Auuyuvib2 32142twf- AUO.doc/e (tl.anSmiSSiVe) liquid crystal display panel or a semi-transparent semi-reflective ai:anSfleetlveMs% display panel. Due to the transmissive liquid crystal display and the transflective (four) and the transparent surface of the board, the non-visible light L2 penetrating from these light-transmissive areas can be the light source of the touch panel. Β—from FIG. 1B, 'the sensing element 12〇 is disposed at the adjacent (four) of the liquid crystal display panel (10), and each of the sensing elements 12() can touch the point according to the angle of the person to the non-visible light L2. The position of ρ. In detail, when the sensing elements 12〇彳贞_彳 are scattered _ visible light L2, the touch signal output circuit c electrically connected to the sensing elements w is estimated according to the signal transmitted by the sensing element i2G. The correct position of the touch point p is in the embodiment, the non-visible light L2 may be an infrared light, and the sensing element 12 () for measuring the non-visible light L2 is an infrared light sensing element. For example, the infrared light sensing element described above may be a complementary metal oxide semiconductor light sensor. In this embodiment, the first light source 132 of the integrated backlight 13 is, for example, a white light emitting diode or other light emitting element suitable for providing visible light L1, and the second light source 134 is, for example, an infrared light emitting diode. (ir_led or other illuminating element suitable for providing non-visible light L2. In a preferred embodiment, the wavelength of the non-visible light L2 is, for example, between 〇n nanometer and 1Q00 metre. $ Figure 3 is an integrated backlight The spectrum of the emitted light (including visible light and non-visible light) after passing through the liquid crystal display panel. Referring to FIG. 1A, FIG. 3 and FIG. 3, the liquid crystal display panel of the present embodiment includes a liquid crystal cell (LC cell) and is attached to the liquid crystal cell. a polarizer on the surface, and the liquid crystal cell has a color of 201106230 ALMjyu / i62 32142twf- AUO.doc/e color filter film (red, green, blue color filter film), so the first light source in the integrated backlight 130 The visible light L1 provided by 132 generates a spectrum of red light, green light, and blue light after passing through the color filter film and the polarizer, and the non-visible light L2 provided by the second light source 134 in the combined backlight 130 passes through After the color filter film and the polarizer, a spectrum of infrared light having a wavelength between 750 nm and 1000 nm is generated. As can be seen from FIG. 3, the transmittance of the non-visible light L2 (infrared light) is not affected by the liquid crystal display panel. 12〇
中的彩色濾光膜及偏光片的影響，因此本實施例確實是可 以達成觸控功能的。 ' 從圖1A與圖1B可知，整合式背光源13〇為一側邊入 光式直下型背光源，此整合式直下型背光源具有一導光板 136 ’而導光板136具有-第一入光面ma以及一第二入 光面136b，第-光源132酉己置於第一入光面136&旁，且 第二光源134配置於第二人光面1361)旁。此外，第一光源 =以及第二綠m例如是分躲置科光板丨 對侧。 八六义發實施例中光學式觸控顯示面板的整 光源二3?可以採用異於圖u以及圖 別設置於導光板136的4二3匕及f二光源134是分 例說明，本發明並不限3=3=式僅是用以舉 須如此擺放。 弟先源132與第二光源134必 由於本實施例已經將第二光源134整合入整合式背光 201106230 AUuyu/i〇2 32142twf-友達.doc/e 源130中’因此僅有感測元件12〇需配置於液晶顯示面板 Π0的邊緣’此設計不會有習知技術所面臨之邊框厚度過 ^的問題。此外’本實施例將第二光源134整合入整合式 月光源130之設計概念可以省略反射元件(retr〇_rej|ect〇r) 的使用’對於光學式觸控顯示面板1〇〇在製造成本方面的 降低有一定程度的幫助。 在本發明之其他可行的實施例中，上述之整合式背光 源130亦為一直下式背光源（未繪示）。舉例而言，直下 式背光源具有一燈箱，而第一光源以及第二光源則配置於 燈箱内。 承上述’由於本發明使用整合式背光源中，因此本發 明可以有效地降低製程本、改善邊框過厚的問題，且無須 使用到反射元件(retro-reflector)。 【圖式簡單說明】 圖1A為本發明一實施例中光學式觸控顯示面板的剖 面示意圖。 圖1B為圖1A中之光學式觸控顯示面板的上視示意 圖。 圖2為本發明另一實施例中光學式觸控顯示面板的整 合式背光源的示意圖。 圖3為整合式背光源所發出的光線（包括可見光及非 可見光）經過液晶顯示面板之後之頻譜。 【主要元件符號說明】 10 201106230 AU0907162 32142twf-友達.doc/e 100 :光學式觸控顯示面板 110 .液晶顯不面板 120 :感測元件 . 13 0 :整合式背光源 132 :第一光源 134 :第二光源 136 :導光板 136a :第一入光面 • 136b :第二入光面 L1 :可見光 L2 :非可見光 P :觸碰點 F :手指 C:觸控訊號讀出電路In the influence of the color filter film and the polarizer, the present embodiment can surely achieve the touch function. As can be seen from FIG. 1A and FIG. 1B, the integrated backlight 13 is a one-side optical direct type backlight, the integrated direct type backlight has a light guide plate 136' and the light guide plate 136 has a first light input. The surface ma and the second light incident surface 136b are disposed adjacent to the first light incident surface 136 & and the second light source 134 is disposed adjacent to the second human light surface 1361). In addition, the first light source = and the second green m, for example, are divided into opposite sides of the light board 丨. The whole light source 2 3 of the optical touch display panel in the embodiment of the eight-six-sixth embodiment can be different from the figure u and the 4 2 3 匕 and f 2 light sources 134 disposed on the light guide plate 136. And not limited to 3 = 3 = style is only used to put it so. The first source 132 and the second source 134 must have integrated the second source 134 into the integrated backlight 201106230 AUuyu/i〇2 32142twf- AUO.doc/e source 130 because of this embodiment. Therefore, only the sensing element 12〇 It needs to be disposed on the edge of the liquid crystal display panel Π0. This design does not have the problem of the thickness of the frame facing the conventional technology. In addition, the design concept of integrating the second light source 134 into the integrated moon light source 130 in this embodiment can omit the use of the reflective element (retr〇_rej|ect〇r). For the optical touch display panel, the manufacturing cost is The reduction in aspects has a certain degree of help. In other possible embodiments of the present invention, the integrated backlight 130 is also a direct-type backlight (not shown). For example, a direct type backlight has a light box, and the first light source and the second light source are disposed in the light box. In view of the above, since the present invention uses an integrated backlight, the present invention can effectively reduce the process and improve the problem that the frame is too thick, and it is not necessary to use a retro-reflector. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a schematic cross-sectional view showing an optical touch display panel according to an embodiment of the present invention. 1B is a top plan view of the optical touch display panel of FIG. 1A. 2 is a schematic diagram of an integrated backlight of an optical touch display panel according to another embodiment of the present invention. Figure 3 shows the spectrum of light (including visible and non-visible light) emitted by the integrated backlight after passing through the liquid crystal display panel. [Major component symbol description] 10 201106230 AU0907162 32142twf- AUO.doc/e 100: Optical touch display panel 110. Liquid crystal display panel 120: Sensing element. 13 0 : Integrated backlight 132: First light source 134: Second light source 136: light guide plate 136a: first light incident surface • 136b: second light incident surface L1: visible light L2: non-visible light P: touch point F: finger C: touch signal readout circuit
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