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WO2011000327A1 - 一种用于触摸屏的光源及一种触摸屏 - Google Patents

一种用于触摸屏的光源及一种触摸屏 Download PDF

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Publication number
WO2011000327A1
WO2011000327A1 PCT/CN2010/074918 CN2010074918W WO2011000327A1 WO 2011000327 A1 WO2011000327 A1 WO 2011000327A1 CN 2010074918 W CN2010074918 W CN 2010074918W WO 2011000327 A1 WO2011000327 A1 WO 2011000327A1
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WO
WIPO (PCT)
Prior art keywords
touch screen
light source
light
photodetector
wedge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2010/074918
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English (en)
French (fr)
Inventor
叶新林
邹镇中
刘建军
刘新斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Irtouch Systems Co Ltd
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Beijing Irtouch Systems Co Ltd
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Publication date
Application filed by Beijing Irtouch Systems Co Ltd filed Critical Beijing Irtouch Systems Co Ltd
Publication of WO2011000327A1 publication Critical patent/WO2011000327A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0078—Side-by-side arrangements, e.g. for large area displays

Definitions

  • the present invention relates to the field of touch screen technologies, and in particular, to a light source for a touch screen and a touch screen. Background technique
  • the touch screen is a new type of human-computer interaction input, and the touch screen input is more intuitive than the traditional keyboard and mouse input methods. With the recognition software, the touch screen can also realize handwriting input.
  • the touch screen consists of a detection unit and a touch screen controller that are mounted in front of the display screen. When a finger or other object touches the touch screen mounted on the front end of the display, the touched position is detected by the touch screen controller and sent to the host through an interface (such as RS-232 serial port, USB, etc.).
  • Optical touch screens are one of many touch screens. In optical touch screens, light sources are an important part of them. Traditional light sources use multiple LEDs (Light Emitting Diodes) for direct illumination. This solution has the following disadvantages:
  • the present invention provides a light source for a touch screen and a touch screen to provide uniform illumination for the touch screen.
  • the invention provides a light source for a touch screen, the light source is mounted on one or more sides of the touch screen frame, the light source is composed of a wedge-shaped light guide plate and an illuminant, and a plurality of convex portions are distributed on the front surface of the wedge-shaped light guide plate.
  • the front surface of the wedge-shaped light guide plate faces the touch detection area of the touch screen.
  • the surface opposite to the front surface of the wedge-shaped light guide plate is provided with a light reflecting element.
  • the front surface of the wedge-shaped light guide plate is preceded by a light-scattering sheet.
  • the illuminant is a light-emitting diode point light source or a columnar light source.
  • the illuminant is an infrared illuminant.
  • two or more of the light sources are mounted on the side of the frame on which the light source is mounted.
  • the light source further includes a reflector disposed around the illuminator for collectively projecting light of the illuminator into the wedge-shaped light guide.
  • the present invention also provides a touch screen including a bezel, the light source described in the above technical solution, at least two photodetectors, and a processing circuit, wherein the photodetector and the light source are not located on the same side of the touch screen frame. And for detecting the intensity of the light; the processing circuit is connected to the photodetector for calculating the position of the touch object and outputting according to the light intensity detected by the photodetector connected thereto.
  • the frame of the touch screen is rectangular, and the photodetectors are two and are installed at two adjacent corners of the touch screen frame.
  • the photodetector is an infrared camera or a photodiode.
  • the present invention also provides another touch screen, comprising: a bezel, the light source described in the above technical solution, at least one photodetector, at least one reflective element and a processing circuit, wherein the photodetector and the light source are not located on the touch screen frame On the same side, for detecting the intensity of the light; the processing circuit is connected to the photodetector for calculating the position of the touch object and outputting according to the light intensity detected by the photodetector connected thereto.
  • the frame of the touch screen is rectangular, and the photodetector is mounted on the opposite side of the border of the touch screen.
  • the frame of the touch screen is rectangular, and the photodetector is mounted on the side of the touch screen. Further, the photodetector is an infrared camera or a photodiode.
  • the photodetectors are two or more.
  • the present invention constitutes a light source by an illuminant and a wedge-shaped light guide plate, and the wedge-shaped light guide plate enables The light emitted by the illuminator is directed toward the touched touch area through the wedge-shaped light guide plate to achieve the object of the present invention.
  • FIG. 1 is a schematic structural diagram of a light source for a touch screen according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of a combination of a wedge-shaped light guide plate and a light-emitting body for a light source of a touch screen according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic front view of a wedge-shaped light guide plate for a light source of a touch screen according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic structural diagram of a light source for a touch screen according to Embodiment 2 of the present invention
  • FIG. 5 is a schematic structural diagram of a touch screen according to Embodiment 3 of the present invention
  • FIG. 6 is a schematic structural diagram of another touch screen according to Embodiment 4 of the present invention.
  • the technical solutions in the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. . All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • the present invention provides a light source for a touch screen.
  • the light source 106 is mounted on one side 104 of the touch screen frame 103.
  • the light source 106 is composed of a wedge-shaped light guide plate 100 and an illuminator 101.
  • a large number of protrusions 201 are distributed on the front surface 102 of the wedge-shaped light guide plate 100 and the front surface 102 of the wedge-shaped light guide plate 100 faces the touch detection area 105 of the touch screen.
  • the touch screen is rectangular, and in practical applications, the touch screen can also have other shapes.
  • the illuminant 101 is a columnar infrared illuminating source.
  • the illuminator 101 can also be other types of illuminators, such as the illuminant 101 being an LED point source or a light emitting diode;
  • the wedge shaped light guiding plate 100 is usually made of polymethyl methacrylate The ester (commonly referred to as plexiglass) is made with a D-light refractive index of 1.482 and can be injection molded using a mold.
  • the wedge-shaped light guide plate 100 can also be made of other materials, such as the wedge-shaped light guide plate 100 is made of ordinary light-transmissive plastic, etc.; in order to better provide uniform illumination for the touch screen, the wedge-shaped light guide plate 100 can also be used.
  • a light diffusing sheet is added in front of the front surface 102.
  • a reflecting member may be provided on the surface opposite to the front surface 102 of the wedge-shaped light guiding plate 100, and the reflecting member may be a single-layer reflective film or the like.
  • a large number of protrusions 201 are distributed on the front surface 102 of the wedge-shaped light guide plate 100, which creates conditions for scattering to achieve diffuse reflection of the emitted light. In general, the projections 201 are uniformly distributed on the front surface 102 of the wedge-shaped light guide plate 100.
  • a reflection cover may be mounted around the illuminator 101 for collectively projecting the light of the illuminator 100 into the wedge-shaped light guide plate 100.
  • the light source 106 is only mounted on one side 104 of the touch screen frame 103. In practical applications, the light source 106 can be mounted on more than two sides of the touch screen frame 103 according to the need for illumination intensity. The light source 106 is mounted on two sides or three sides of the touch screen frame 103.
  • FIG. 4 is a schematic structural diagram of another light source for a touch screen according to the present invention.
  • the only difference between this embodiment and the light source for the touch screen shown in FIG. 1 is that the edge 104 of the touch screen frame 103 on which the light source 106 is mounted is shown in FIG.
  • This structure is suitable for large-sized touch screens.
  • FIG. 5 is a schematic structural diagram of a touch screen according to the present invention.
  • a touch screen shown in FIG. 5 includes a bezel 103, a light source 106, two photodetectors 501, and a processing circuit (not shown), wherein the light
  • the detector 501 and the light source 106 are not located on the same side of the touch screen frame for detecting the intensity of the light; the processing circuit is connected to the light detector 501 for calculating the light intensity detected by the photodetector connected thereto. Touch the location of the object and output it.
  • the method of processing the circuit to calculate the position of the touch object is generally to use triangulation, or other methods. Whether using triangulation or other methods, it is an existing technology and will not be repeated here.
  • the two photodetectors 501 in Fig. 5 are infrared cameras mounted on opposite sides of the light source 106.
  • the photodetector 501 can also be other types of photodetectors, such as the photodetector 501 being a light emitting diode or the like; the photodetector 501 can also be mounted on two adjacent corners of the touch screen frame; More than one point or better detection accuracy, the photodetector 501 may be two or more.
  • the specific case of the light source 106 is as described in the foregoing text and will not be repeated here.
  • the touch screen is rectangular, and in practical applications, the touch screen can also have other shapes.
  • FIG. 6 is a schematic structural diagram of another touch screen according to the present invention.
  • a touch screen shown in FIG. 6 includes a bezel 103, a light source 106, a photodetector 501, a reflective component 601, and a processing circuit (not shown).
  • the photodetector 501 and the light source 106 are not located on the same side of the touch screen frame for detecting the intensity of the light; the processing circuit is connected to the photodetector 501 for detecting according to the photodetector 501 connected thereto.
  • the light intensity to calculate the position of the touch object and output.
  • the processing circuit calculates the position of the touch object by calculating the touch object in the touch detection area 105 according to the condition of the touch object itself detected by the photo detector and the virtual image condition of the touch object in the reflective element 601. Location, this method is already prior art and will not be repeated here.
  • the photodetector 501 of Fig. 6 is an infrared camera mounted on a corner of the frame of the touch screen, and the reflecting member 601 is mounted on the opposite side of any one of the sides constituting the corner on which the photodetector is mounted.
  • the photodetector 501 can also be other types of photodetectors, such as the photodetector 501 being a light emitting diode or the like; in order to achieve multiple points or to obtain better detection accuracy, the photodetector can also be two or more.
  • the specific case of the light source 106 is as described in the foregoing text and will not be repeated here.
  • the reflective element 601 can be a conventional flat mirror or other types of reflective elements 601, such as the reflective element 601 being a very smooth metal surface. That is to say, as long as the touch object can be a reflective element 601 in which a virtual image can be formed; in order to achieve multiple points or to obtain better detection accuracy, more than two reflective elements can be used.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Position Input By Displaying (AREA)

Description

一种用于触摸屏的光源及一种触摸屏 技术领域
本发明涉及触摸屏技术领域， 尤其涉及一种用于触摸屏的光源及一种 触摸屏。 背景技术
触摸屏是一种新型的人机交互输入方式， 与传统的键盘和鼠标输入方 式相比， 触摸屏输入更直观。 配合识别软件， 触摸屏还可以实现手写输入。 触摸屏由安装在显示器屏幕前面的检测部件和触摸屏控制器组成。 当手指 或其它物体触摸安装在显示器前端的触摸屏时， 所触摸的位置由触摸屏控 制器检测， 并通过接口 （如 RS— 232串行口， USB等） 送到主机。 光学触 摸屏是众多触摸屏中的一种， 在光学触摸屏中， 光源是其中很重要的一个 组成部分， 传统的光源使用多个 LED ( Light Emitting Diode, 发光二极管 ) 直接照明， 该方案存在以下缺点：
由于采用 LED直接照明， 导致被照亮的部位照度不均匀。 发明内容
本发明提供一种用于触摸屏的光源及一种触摸屏， 以便为触摸屏提供 均匀的照明。
本发明提供一种用于触摸屏的光源， 光源安装在触摸屏边框的一条或 多条边上， 所述光源由楔形导光板和发光体组成， 所述楔形导光板的前表 面上分布有大量的凸起且楔形导光板的前表面面向触摸屏的触摸检测区 域。
进一步， 所述与楔形导光板的前表面相对的表面设有反光元件。
更进一步， 所述楔形导光板的前表面之前装有光散射片。
进一步， 所述发光体为发光二极管点光源或柱状光源。
更进一步， 所述发光体为红外发光体。 进一步， 所述装有光源的边框的边上装有两个或两个以上所述光源。 更进一步， 所述光源还包括一个反射罩， 放置在所述发光体的周围， 用于将所述发光体的光线集中投射到所述楔形导光板中。
进一步， 所述光源安装在触摸屏边框的两条边或三条边上。 本发明同时提供了一种触摸屏， 该触摸屏包含有边框、 上述技术方案 中所述的光源、 至少两个光检测器和一个处理电路， 其中光检测器与光源 不位于触摸屏边框的同一条边上， 用于检测光的强度； 处理电路与所述光 检测器相连， 用于根据与其相连的光检测器所检测到的光强度来计算触摸 物的位置并输出。
进一步， 所述触摸屏的边框为矩形， 所述光检测器为两个并安装在触 摸屏边框两个相邻的角。
更进一步， 所述光检测器为红外摄像头或光电二极管。 本发明还提供了另外一种触摸屏， 该触摸屏包含有边框、 上述技术方 案中所述的光源、 至少一个光检测器、 至少一个反射元件和处理电路， 其 中光检测器与光源不位于触摸屏边框的同一条边上， 用于检测光的强度； 处理电路与光检测器相连， 用于根据与其相连的光检测器所检测到的光强 度来计算触摸物的位置并输出。
进一步， 所述触摸屏的边框为矩形， 所述光检测器安装在触摸屏边框 对边上。
更进一步， 所述触摸屏的边框为矩形， 所述光检测器安装在触摸屏边 进一步， 所述光检测器为红外摄像头或光电二极管。
更进一步， 所述光检测器为两个或两个以上。
进一步， 所述反射元件为两个或两个以上。 本发明通过一个发光体和一个楔形导光板构成光源， 该楔形导光板使 发光体所发出的光经楔形导光板后均勾地射向触摸的触摸区域， 以实现本 发明的目的。 附图说明
本发明实施例或现有技术描述中所需要使用的附图作筒单地介绍， 显而易 见地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本领域普通技 术人员来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其 他的附图。
图 1为本发明实施例一所示的一种用于触摸屏的光源的结构示意图； 图 2为本发明实施例一中的一种用于触摸屏的光源的楔形导光板和发 光体组合示意图；
图 3为本发明实施例一中的一种用于触摸屏的光源的楔形导光板的前 表面示意图；
图 4为本发明实施例二所示的一种用于触摸屏的光源的结构示意图； 图 5为本发明实施例三所示的一种触摸屏的结构示意图；
图 6为本发明实施例四所示的另一种触摸屏的结构示意图。 具体实施方式 下面将结合本发明实施例中的附图，对本发明中的技术方案进行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明的一部分实施例， 而不 是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有做 出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明提供一种用于触摸屏的光源， 如图 1、 图 2、 图 3所示， 该光源 106安装在触摸屏边框 103的一条边 104上， 光源 106由楔形导光板 100 和发光体 101组成， 所述楔形导光板 100的前表面 102上分布有大量的凸 起 201且楔形导光板 100的前表面 102面向触摸屏的触摸检测区域 105。 在本实施例中， 触摸屏为矩形， 在实际应用中， 触摸屏也可为其它形状。 发光体 101为柱状的红外发光源， 在实际应用中发光体 101也可为其它类 型的发光体， 如发光体 101为一个 LED点光源或发光二极管； 楔形导光板 100通常由聚甲基丙烯酸甲酯 （通常称为有机玻璃） 制成， 其 D光折射率 为 1.482, 可以采用模具注射成型。在实际应用中楔形导光板 100也可为其 它材料制成， 如楔形导光板 100为普通透光的塑料制成等； 为了更好的为 触摸屏提供均勾的照明， 也可在楔形导光板 100的前表面 102前面再加上 一片光散射片。 同时为了尽可能少地减少光的散失， 也可在与楔形导光板 100的前表面 102相对的表面设有反光元件， 此反光元件可为筒单的反光 膜等。 楔形导光板 100的前表面 102上分布有大量的凸起 201 , 这是为了 散射创造条件， 使出射的光线达到漫反射的效果。 一般情况下凸起 201在 楔形导光板 100的前表面 102上分布是均匀的。
为进一步减少光的散失， 也可在发光体 101的周围安装一个反射罩， 用于将所述发光体 100的光线集中投射到所述楔形导光板 100中。 在图 1 所示的实施例中， 光源 106只安装在触摸屏边框 103的一条边 104上， 在 实际应用中也可根据对光照强度的需要在触摸屏边框 103的两条以上的边 上安装光源 106,如在触摸屏边框 103的两条边或三条边上安装有光源 106。
图 4为本发明所提供的另一种用于触摸屏的光源结构示意图， 此实施 例与图 1所示的一种用于触摸屏的光源的唯一区别在于装有光源 106的触 摸屏边框 103的边 104上有两个光源 106, 这样能够为触摸屏提供更充足 的光照， 这种结构适用于大尺寸的触摸屏。 当然我们可以根据需要在装有 光源 106的触摸屏边框 103的边上安装两个以上的光源 106。
图 5为本发明所提供的一种触摸屏结构示意图， 图 5所示的一种触摸 屏包含有边框 103 , 光源 106、 两个光检测器 501和一个处理电路（图中未 示出） ， 其中光检测器 501与光源 106不位于触摸屏边框的同一条边上， 用于检测光的强度； 处理电路与上述光检测器 501相连， 用于根据与其相 连的光检测器所检测到的光强度来计算触摸物的位置并输出。 在这里处理 电路计算触摸物的位置方法一般是运用三角测量法， 也可是其它方法。 不 管是运用三角测量法， 还是其它方法， 都是现有技术， 在此就不再重述了。 图 5中的两个光检测器 501为红外摄像头， 安装在光源 106的对面边上。 在实际应用中，光检测器 501也可为其它类型的光检测器，如光检测器 501 为发光二极管等；光检测器 501也可安装在触摸屏边框上两个相邻的角上； 为了实现多点或得到更好检测精度， 光检测器 501也可为两个以上。 光源 106 的具体情况如前面文字所述， 在此就不重述了。 在本实施例中， 触摸 屏为矩形， 在实际应用中， 触摸屏也可为其它形状。
图 6为本发明所提供的另一种触摸屏的结构示意图， 图 6所示的一种 触摸屏包含有边框 103、 光源 106、 一个光检测器 501、 一个反射元件 601 和一个处理电路（图中未示出） ， 其中光检测器 501与光源 106不位于触 摸屏边框的同一条边上， 用于检测光的强度； 处理电路与光检测器 501相 连， 用于根据与其相连的光检测器 501所检测到的光强度来计算触摸物的 位置并输出。 在这里处理电路计算触摸物的位置方法是根据光检测器所检 测到的触摸物本身像的情况和触摸物在反射元件 601中所成的虚像情况来 计算触摸物的在触摸检测区域 105中的位置， 此方法已为现有技术， 在此 就不再重述了。 图 6中的光检测器 501为红外摄像头， 安装在触摸屏边框 的一个角上， 反射元件 601安装在组成装有光检测器的角的任意一条边的 对边上。 在实际应用中， 光检测器 501也可为其它类型的光检测器， 如光 检测器 501为发光二极管等； 为了实现多点或得到更好检测精度， 光检测 器也可为两个以上。 光源 106的具体情况如前面文字所述， 在此就不重述 了。 反射元件 601可以为常用的平面镜， 也可为其它类型的反射元件 601 , 如反射元件 601为表面非常光滑的金属表面。 也就是说只要触摸物能够在 其中成虚像的反射元件 601都行； 为了实现多点或得到更好检测精度， 反 射元件也可使用两个以上。 在实际应用中， 我们也可将光检测器 501安装 在一个矩形的触摸屏的边框的一条边上， 将反射元件 601安装在装有光检 测器 501的边的对边上， 这样也可实现本发明所述的方案。 同时为了节省 成本，也可使用反射元件来代替光检测器，也就是说只要有一个光检测器， 可使用多个反射元件。 同时我们也可使用多个光检测器来提高检测精度和 实现多点。 在本实施例中， 触摸屏为矩形， 在实际应用中， 触摸屏也可为 其它形状。 通过以上的实施方式的描述， 本领域的技术人员可以清楚地了解到本 发明可以通过硬件实现， 也可以借助软件加必要的通用硬件平台的方式来 实现。
总之， 以上所述仅为本发明的较佳实施例而已， 并非用于限定本发明 的保护范围。 凡在本发明的精神和原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。

Claims

权利要求
1、一种用于触摸屏的光源， 所述光源安装在触摸屏边框的一条或多条 边上， 其特征在于， 所述光源由楔形导光板和发光体组成， 所述楔形导光 板的前表面上分布有大量的凸起且楔形导光板的前表面面向触摸屏的触摸 检测区 i或。
2、 如权利要求 1所述的一种用于触摸屏的光源， 其特征在于， 所述与 楔形导光板的前表面相对的表面设有反光元件。
3、 如权利要求 2所述的一种用于触摸屏的光源， 其特征在于， 所述楔 形导光板的前表面之前装有光散射片。
4、如权利要求 1至 3中任意一项所述的一种用于触摸屏的光源，其特 征在于， 所述发光体为发光二极管点光源或柱状光源。
5、 如权利要求 4所述的一种用于触摸屏的光源， 其特征在于， 所述发 光体为红外发光体。
6、 如权利要求 5所述的一种用于触摸屏的光源， 其特征在于， 所述装 有光源的边框的边上装有两个或两个以上所述光源。
7、 如权利要求 6中所述的一种用于触摸屏的光源， 其特征在于， 所述 光源还包括一个反射罩， 放置在所述发光体的周围， 用于将所述发光体的 光线集中投射到所述楔形导光板中。
8、 如权利要求 5所述的一种用于触摸屏的光源， 其特征在于， 所述光 源安装在触摸屏边框的两条边或三条边上。
9、 一种触摸屏， 包含有边框， 其特征在于， 所述触摸屏还包含有权利 要求 1至 8中任意一个所述的光源、 至少两个光检测器和一个处理电路， 其中光检测器与光源不位于触摸屏边框的同一条边上，用于检测光的强度； 处理电路与所述光检测器相连， 用于根据与其相连的光检测器所检测到的 光强度来计算触摸物的位置并输出。
10、 如权利要求 9所述的一种触摸屏， 其特征在于， 所述触摸屏的边 框为矩形， 所述光检测器为两个并安装在触摸屏边框两个相邻的角上。
11、 如权利要求 9或 10所述的一种触摸屏， 其特征在于， 所述光检测 器为红外摄像头或光电二极管。
12、 一种触摸屏， 包含有边框， 其特征在于， 所述触摸屏还包含有权 利要求 1至 8中任意一个所述的光源、 至少一个光检测器、 至少一个反射 元件和处理电路， 其中光检测器与光源不位于触摸屏边框的同一条边上， 用于检测光的强度； 处理电路与光检测器相连， 用于根据与其相连的光检 测器所检测到的光强度来计算触摸物的位置并输出。
13、 如权利要求 12所述的一种触摸屏， 其特征在于， 所述触摸屏的边 框为矩形，所述光检测器安装在触摸屏边框的一个角上， 所述反射元件安 装在组成装有光检测器的角的任意一条边的对边上。
14、 如权利要求 12所述的一种触摸屏， 其特征在于， 所述触摸屏的边 框为矩形，所述光检测器安装在触摸屏边框的一条边上， 所述反射元件安 装在装有光检测器的边的对边上。
15、 如权利要求 12或 13或 14所述的一种触摸屏， 其特征在于， 所述 光检测器为红外摄像头或光电二极管。
16、 如权利要求 15所述的触摸屏， 其特征在于， 所述光检测器为两个 或两个以上。
17、 如权利要求 16所述的触摸屏， 其特征在于， 所述反射元件为两个 或两个以上。
PCT/CN2010/074918 2009-07-03 2010-07-02 一种用于触摸屏的光源及一种触摸屏 Ceased WO2011000327A1 (zh)

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CN2496052Y (zh) * 2001-04-13 2002-06-19 宋义 改进的均匀高效率侧发光背光源
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CN2496052Y (zh) * 2001-04-13 2002-06-19 宋义 改进的均匀高效率侧发光背光源
CN1721953A (zh) * 2001-07-27 2006-01-18 株式会社恩普乐 面光源装置及导光板
CN1774692A (zh) * 2003-02-14 2006-05-17 奈克斯特控股公司 触摸屏信号处理

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