WO2014023218A1 - 一种红外触摸屏 - Google Patents

一种红外触摸屏 Download PDF

Info

Publication number
WO2014023218A1
WO2014023218A1 PCT/CN2013/080888 CN2013080888W WO2014023218A1 WO 2014023218 A1 WO2014023218 A1 WO 2014023218A1 CN 2013080888 W CN2013080888 W CN 2013080888W WO 2014023218 A1 WO2014023218 A1 WO 2014023218A1
Authority
WO
WIPO (PCT)
Prior art keywords
infrared
edge
emitting element
infrared emitting
elements
Prior art date
Application number
PCT/CN2013/080888
Other languages
English (en)
French (fr)
Inventor
刘洋
刘新斌
Original Assignee
北京汇冠新技术股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 北京汇冠新技术股份有限公司 filed Critical 北京汇冠新技术股份有限公司
Publication of WO2014023218A1 publication Critical patent/WO2014023218A1/zh

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • G06F3/0418Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0428Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual

Definitions

  • the present invention relates to the field of touch control technologies, and in particular, to an infrared touch screen. Background technique
  • the existing infrared touch screen generally includes an array of infrared emitting elements and infrared receiving on a printed circuit board mounted around the touch panel.
  • the array of elements, the light between the array of infrared emitting elements and the array of infrared receiving elements form a dense scanning line network on the touch panel, and the inside of the touch panel is identified by detecting the occlusion of the scanning line between the array of infrared emitting elements and the array of infrared receiving elements
  • the position and/or size of the touch object requires an array of two sets of infrared emitting elements and two sets of infrared receiving elements to achieve touch positioning, which is relatively high in production cost.
  • FIG. 1 it is a schematic diagram of an infrared touch screen and a scan line distribution thereof in the prior art.
  • the infrared touch screen having the infrared emitting element array 101 and the infrared receiving element array 102 scans in only one direction during scanning, which saves cost and can improve scanning speed.
  • one infrared emitting element corresponds to a plurality of infrared receiving elements
  • one infrared receiving element corresponds to a plurality of infrared emitting elements, such as a pair of five, one pair seven or one pair eleven scanning modes.
  • FIG. 2 it is a schematic diagram of an actual scanning effect in which scanning is performed in only one direction in the prior art.
  • the black area in the figure is a possible area of the touch object, and a certain method of removing ghost points according to the scanning result is also recognized. Touch points, especially for touch points located in the center of the touch panel.
  • the technical problem to be solved by the present invention is to provide an infrared touch screen which reduces the cost and can improve the touch effect of the corner area.
  • the present invention provides an infrared touch screen including an array of infrared emitting elements including a plurality of infrared emitting elements, an array of infrared receiving elements including a plurality of infrared receiving elements, a first edge, a second edge, a third edge, and a fourth edge, wherein The first edge is opposite to the third edge, the second edge is opposite to the fourth edge, and the infrared emitting element array and the infrared receiving element array are respectively located at the first edge, a third edge, on each of the second edge and the fourth edge, a reflective element for reflecting a light beam directed to the second edge and the fourth edge to the third edge is disposed.
  • At least one infrared emitting element located at an end of the infrared emitting element array is non-perpendicularly mounted to the first edge; at least one infrared emission at least at an end of the infrared receiving element array The component is mounted non-perpendicularly to the third edge.
  • the infrared touch screen has a plurality of infrared emitting elements that are non-perpendicularly mounted to the first edge and infrared receiving elements that are non-perpendicularly mounted to the third edge.
  • An infrared touch screen as described above, a plurality of continuous or spaced infrared emitting elements mounted non-perpendicularly to the first edge at an end adjacent to the second edge and more non-vertically mounted to the third edge
  • Each of the continuous or spaced infrared receiving elements is inclined toward the second edge; a plurality of continuous or spaced infrared emitting elements and non-perpendicularly mounted at an end adjacent the fourth edge
  • the plurality of continuous or spaced infrared receiving elements of the third edge that are non-vertically mounted are all inclined toward the fourth edge.
  • the end of the infrared emitting element array includes at least one infrared emitting element inclined toward the second edge and an infrared emitting element inclined toward the fourth edge; the infrared receiving element array The end portion includes at least one infrared receiving element that is inclined toward the second edge and an infrared receiving element that is inclined toward the fourth edge.
  • the infrared emitting element located at the middle of the infrared emitting element array is arranged in the same manner as the infrared emitting element at the end; the infrared receiving element located at the middle of the infrared receiving element array is located The infrared receiving elements of the ends are arranged in the same manner.
  • the infrared emitting element array includes a plurality of emission groups, each of the emission groups including at least one infrared emitting element inclined toward the second edge and at least one inclined toward the fourth edge
  • An infrared emitting element; the infrared receiving element array comprising a plurality of receiving groups, each of the receiving groups comprising at least one infrared receiving element inclined toward the second edge and at least one infrared receiving element inclined toward the fourth edge .
  • each of the emission groups includes two infrared emitting elements, such that an infrared emitting element that is obliquely mounted toward the second edge in the array of infrared emitting elements and an infrared emitting element that is inclined toward the fourth edge are spaced apart from each other Arranging; each of the receiving groups includes two infrared receiving elements such that the infrared receiving elements inclined toward the second edge in the array of infrared emitting elements and the infrared receiving elements inclined toward the fourth edge are spaced apart from each other.
  • each of the emission groups includes three infrared emitting elements; each of the receiving groups includes three infrared receiving elements.
  • one of the infrared emitting elements located in the middle of each of the emission groups is mounted perpendicular to the first edge, and is perpendicular to at least one of the emission groups located at the end of the infrared emitting element array
  • the first edge-mounted infrared emitting element is provided with a shading screen for preventing a beam emitted by the infrared emitting element from being emitted toward the reflecting element; and/or an infrared receiving element located in the middle of each of the receiving groups is perpendicular to
  • the third edge is mounted and disposed on the infrared receiving element mounted perpendicular to the third edge in at least one receiving group at the end of the infrared receiving element array for preventing the infrared receiving element from receiving the reflection A blackout screen of the beam reflected by the component.
  • An infrared touch screen as described above, at least one of the ends of the array of infrared emitting elements
  • One of the infrared emitting elements in the middle of the emission group is obliquely mounted toward an edge of the second edge and the fourth edge that is far away from the second edge, so that the light beam emitted by the infrared emitting element is not irradiated On the reflective element.
  • the reflective element is a plane mirror or a metal sheet of high reflectivity.
  • the infrared touch screen installs the infrared emitting element array and the infrared receiving element array only on the opposite edges of the touch detecting area, thereby eliminating the infrared emitting element and the infrared receiving element on the other two edges, thereby saving Cost; on the other hand, a reflective element is respectively mounted on both edges of the array of infrared emitting elements and the array of infrared receiving elements, and the light for injecting the infrared emitting element toward the reflecting element is reflected to the infrared receiving element, which can increase the touch screen edge
  • the density of the scan lines in the corner regions increases the corner effect.
  • FIG. 1 is a schematic diagram of an infrared touch screen and a scan line distribution thereof in the prior art
  • FIG. 2 is a schematic diagram of an actual scan effect of scanning in only one direction in the prior art
  • FIG. 3 is a "corner effect" generated in the prior art.
  • FIG. 4 is a schematic structural diagram of an infrared touch screen according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic structural diagram of an infrared touch screen according to Embodiment 2 of the present invention.
  • Figure 6 is a comparison diagram of the scan line distribution when the reflective element is mounted on the right side of the infrared touch screen and the transmitting element is not mounted;
  • Figure 7 is a comparison diagram of the actual scanning effect when the reflective element is mounted and when the transmitting element is not mounted;
  • FIG. 8 is a schematic structural diagram of an infrared touch screen according to Embodiment 3 of the present invention. detailed description
  • the embodiment provides an infrared touch screen, as shown in FIG. 4, including multiple infrared rays.
  • An infrared emitting element array 101 of the radiating element an infrared receiving element array 102 including a plurality of infrared receiving elements, and four edges, the first edge 401, the second edge 402, the third edge 403, and the fourth Edge 404.
  • first edge 401 and the third edge 402 are opposite, the second edge 402 is opposite to the fourth edge 404, the infrared emitting element array 101 is mounted on the first edge 401, and the infrared receiving element array 102 is mounted on the third edge 403, one The infrared light emitted by the infrared emitting element is received by at least one of the opposite infrared receiving elements, and a reflective element 405, 406 is disposed on each of the second edge 402 and the fourth edge 404 for the infrared emitting element located at both ends of the first edge 401.
  • the light beam directed at the second edge 402 and/or the fourth edge 404 is reflected to the third edge 403, received by the infrared receiving element at the third edge 303, thereby avoiding light rays directed at the second edge 402 and the third edge 403
  • the waste caused by the absence of infrared receiving components can also increase the density of the scanning lines in the corner regions, thereby improving the touch effect of the corner regions; and additionally providing an array of infrared emitting elements and an array of infrared receiving elements on only two edges. It can save costs; again, when scanning, only one direction needs to be scanned, so the scanning speed can also be increased.
  • the reflective elements 405, 406 may be planar mirrors or may be high reflectivity metal sheets or other reflective elements made of high reflectivity materials.
  • the infrared emitting element and the infrared receiving element may be installed at an angle, that is, the infrared emitting element and the infrared receiving element are coupled to the first edge 401 or the first
  • the three edges 403 are not mounted vertically so that one infrared receiving element can receive only one direction of light beam at the same time when scanning the infrared receiving element.
  • the structure of the infrared touch screen in this embodiment is a preferred embodiment.
  • each of the fire group 501 includes two infrared emitting elements, one of which is tilted toward the second edge 402 (tilted to the right in FIG. 5), and the other is tilted toward the fourth edge 404 (leftward in FIG.
  • the tilted infrared emitting element is such that the infrared emitting elements in the infrared emitting element array 101 that are inclined toward the second edge 402 and the infrared emitting elements that are inclined toward the fourth edge 404 are spaced apart from each other; likewise, the infrared is located at the third edge 403
  • the infrared receiving elements in the receiving element array 102 are divided into a plurality of receiving groups 502, each The receiving group 502 also includes two infrared receiving elements, one of which is tilted toward the second edge 402 (tilted to the right in FIG. 5) and the other is tilted toward the fourth edge 404 (tilted to the left in FIG. 5) to enable infrared emission.
  • the infrared receiving elements of the element array 102 that are inclined toward the second edge and the infrared receiving elements that are inclined toward the fourth edge 404 are spaced apart from each other. If the infrared emitting elements 101 in FIG. 5 are numbered in order from left to right in the order of El, E2, . . . En, the infrared receiving elements 102 are numbered in order from left to right in the order of D1, D2, ..., Dn, and the number is an odd number of infrared rays.
  • the transmitting elements (E l, E3, %) and the infrared receiving elements (Dl, D3, %) are all tilted to the left, the infrared emitting elements (E2, E4, ...) and the infrared receiving elements (D2, D4... 7) are installed obliquely to the right.
  • the angle of inclination of the infrared emitting element and the infrared receiving element By adjusting the angle of inclination of the infrared emitting element and the infrared receiving element, the angle of each scanning line can be changed.
  • the specific tilting angle can be obtained by experimental or geometric calculation so that the infrared emitting element and the infrared receiving element have The angle of inclination of the best correspondence.
  • the scanning may be sequentially performed.
  • the five infrared receiving elements on the three edges 403 which are opposite to the emitting surface of the infrared emitting element that is, the five infrared receiving elements of the scanning receiving surface facing the propagation direction of the infrared emitting element, such as for El l, scan D2, D4, D6, D8, D10 five infrared receiving components, for E12, scan D13, D15, D17, D19, D21 five infrared receiving components, according to this scanning method can make the infrared receiving component receive signals As strong as possible, of course, there are other ways to scan.
  • each of the transmitting groups 501 is equivalent to one wide-angle transmitting element
  • each receiving group 502 is equivalent to a wide-angle receiving element.
  • a tilted scan line is provided at a larger angle, so the resolution of the touch screen can be improved, and multiple touch points can be identified.
  • the scanning manners of the two ends are the same due to the symmetry of the touch screen, so that for the convenience of description and space saving, only the infrared emitting elements and infrared rays located at the right end portion are The receiving element is described.
  • FIG. 5 for several infrared emitting elements which are inclined to the left in the right end portion, since the light beams emitted from these infrared emitting elements can be directed into the touch panel, they can be directly located at the third edge 403.
  • the right-inclined infrared receiving element receiving may be scanned in the same manner as the infrared emitting element located in the middle portion of the infrared emitting element array 102, and the infrared emitting element mounted obliquely to the right in the right end portion, when the infrared light beam emitted by it is all or When a portion of the light is incident on the reflective element 405 on the second edge 402, the light beam is reflected by the reflective element and can be tilted to the right by the third edge 403.
  • the reflective element 405 When the reflective element 405 is not mounted, one of the scanned areas is much larger than the touch object. The actual area, the recognition accuracy is very poor, the other is not recognized at all, and the reflective element is installed. After 05, both touch objects can be detected, and the precision is relatively high. Therefore, after the reflective element 405 is mounted on the edge, the touch effect of the corner area can be greatly improved, and the corner effect problem can be solved.
  • the tilt mounting in the embodiment is in a plane where the touch detection area is located or a plane parallel thereto, and the angle between the main axis of the infrared emitting element and the infrared receiving element and the first edge or the second edge is Sharp or obtuse angle;
  • vertical or non-vertical mounting as described in this embodiment means that the main axes of the infrared emitting element and the infrared receiving element are perpendicular or non-perpendicular to the first edge or the second edge, and the description of the mounting direction is also applicable to other implementations. the way.
  • the embodiment provides an infrared touch screen.
  • the scanning line with a larger tilt angle can be provided, the resolution is improved, and multi-touch can also be realized; a relatively small edge-inclined infrared emitting element and an infrared receiving element.
  • the infrared light emitted by the infrared emitting element is partially or completely directed toward the reflective element, and is reflected by the reflective element and received by the infrared receiving element, thereby increasing the scanning line in the corner area.
  • the density greatly improves the corner effect.
  • This embodiment provides a third type of infrared touch screen.
  • This embodiment is the same as the first two embodiments.
  • the infrared emitting element and the infrared receiving element are respectively installed on the first edge and the third edge.
  • the second edge and the fourth edge are each mounted with a reflective element.
  • This embodiment differs from the first two embodiments in the manner in which the infrared emitting element and the infrared receiving element are mounted.
  • all of the infrared emitting elements in the infrared emitting element array 101 are divided into a plurality of emission groups 801 in a positional order, and each of the emission groups 801 includes three infrared emitting elements, wherein the middle is located A vertical first edge 401 is mounted, and two of the two sides are mounted obliquely toward the second edge 402 (rightward) and the fourth edge 403 (leftward), respectively, such that there is a direction between each of the two vertically mounted infrared emitting elements
  • An infrared ray element mounted obliquely to the right and an infrared ray element mounted obliquely to the left may also be mounted with an infrared emitting element perpendicular to the first edge 401 between two adjacent emission groups 801, and an infrared emission obliquely to the right
  • the components, the vertically mounted infrared emitting elements, and the leftwardly mounted infrared emitting elements are spaced apart from each
  • the infrared touch screen of the above arrangement if a one-to-five scanning method is employed in the touch recognition scanning process, as shown in FIG. 8, for the infrared emitting element and the infrared receiving element located in the middle portion of the infrared emitting element array 101
  • the infrared light emitted by the infrared ray element tilted to the right is received by the opposite, leftwardly inclined red and/or vertically mounted five infrared receiving elements; the infrared light emitted by the left tilting infrared emitting element is located opposite
  • the five infrared receiving elements that are tilted to the right and/or vertically are received; the infrared light emitted by the vertically mounted infrared emitting elements is received by the vertically opposite five infrared receiving elements located opposite, or vertically opposite thereto
  • the tilted mounted infrared receiving elements on both sides of the mounted infrared receiving element are received.
  • an infrared transmitting element in order to increase the intensity of the received signal, can be selected for scanning with an infrared receiving element that is closer to the receiving surface and that faces the light beam emitted by the infrared emitting element.
  • the infrared emitting element and the infrared receiving element located at the right end are taken as an example for description, and the correspondence relationship between the infrared emitting element tilted to the left and the infrared receiving element is the same as that in the middle part. .
  • the infrared receiving element of the reflected beam (tilted to the left) is received, so that some scanning lines in the form of a broken line can be added near the corners of the touch panel, which can improve the corner effect, perpendicular to the right end
  • the infrared emitting element mounted on the first edge 401 and the infrared receiving element are mounted perpendicular to the third edge 403, in order to prevent the infrared receiving element from simultaneously receiving the infrared light directly emitted by the infrared emitting element and the infrared light emitted by the reflecting element.
  • a shading screen may be provided on the infrared emitting element mounted perpendicular to the first edge 401 and/or the infrared receiving element mounted perpendicular to the third edge 403 to prevent the light emitted by the vertically mounted infrared emitting element from being reflected.
  • the component and/or the vertically mounted infrared receiving component receives the infrared light reflected from the reflective component, and the infrared emitting component located in the middle of each of the firing groups 801 at both ends may be obliquely mounted toward the center of the touch detection area, that is, toward the second An edge of the edge 402 and the fourth edge 404 which is far away from the infrared emitting element is obliquely mounted, and the right end is inclined to the left, and the left end is inclined to the right, so that the light beam emitted by the infrared emitting element does not illuminate the reflective element.
  • the infrared emitting component located in the middle of each of the firing groups 801 at both ends may be obliquely mounted toward the center of the touch detection area, that is, toward the second An edge of the edge 402 and the fourth edge 404 which is far away from the infrared emitting element is obliquely mounted, and the right end is inclined to the left, and the left end is inclined to
  • the infrared emitting element and the infrared receiving element are installed on only two edges, which can greatly save the cost; secondly, all the infrared emitting elements and the infrared receiving elements are divided into a plurality of transmitting groups and receiving groups, The infrared elements in each of the fire group and the receiving group are mounted in different directions, and can be used as a wide-angle transmitting element and a wide-angle receiving element to provide a scanning line with a large tilt angle, which can improve resolution and multi-touch; By installing a reflective element on both edges without an infrared component, the light directed to the two edges is reflected to an edge on which the infrared receiving component is mounted, and is received by the infrared receiving component, thereby avoiding waste of light and touching The scan lines near the corners of the panel are denser and can greatly improve the corner effect.
  • the infrared emitting element and the infrared receiving element located at the end of the infrared emitting element array and the infrared receiving element group array may be in accordance with any one of the first embodiment, the second embodiment and the third embodiment.
  • the mounting arrangement is installed, and the infrared emitting element and the infrared receiving element located in the middle portion can be vertically mounted in the prior art, and the number of inclined infrared emitting elements and infrared receiving elements at the end is specifically It can be determined according to the experiment, or it can be calculated according to the tilt angle and the size of the infrared touch screen.
  • the infrared emitting element and the infrared receiving element are installed only obliquely at the end (non-vertical mounting), the infrared emitting element and the infrared receiving element at the same end are inclined.
  • the directions may be the same or different.
  • they may be arranged obliquely to the left and to the right, or may be installed between two vertically mounted infrared emitting elements.
  • An infrared emitting element tilted to the left and tilted to the right Infrared emitting elements, arranged manner for receiving elements located at the end portion of the infrared and infrared emitting elements arranged in the same manner.
  • the non-vertical mounting (inclined mounting) of the infrared emitting element and the infrared receiving element are not equally spaced, or inclined.
  • the number of the infrared emitting element and the infrared receiving element is one or more, or has an obliquely mounted infrared emitting element and an infrared receiving element only at one end of the infrared emitting element array and the infrared receiving element array, provided that these modifications and variations of the present invention belong to The invention is also intended to cover such modifications and variations within the scope of the appended claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

本发明公开了一种红外触摸屏,涉及触控技术领域,为解决触摸屏的边角效应而设计。本发明的红外触摸屏,包括红外发射元件阵列、红外接收元件阵列、第一边缘、第二边缘、第三边缘和第四边缘,其中,所述第一边缘和所述第三边缘相对,所述第二边缘与所述第四边缘相对,所述红外发射元件阵列和所述红外接收元件阵列分别位于所述第一边缘和所述第三边缘,在所述第二边缘和所述第四边缘上分别设置有用于将射向所述第二边缘和所述第四边缘的光束反射至所述第三边缘的反射元件。通过反射元件的反射可以增加边角区域的扫描线密度,进而改善边角效应。

Description

一种红外触摸屏
技术领域
本发明涉及触摸控制技术领域, 尤其涉及一种红外触摸屏。 背景技术
随着多媒体技术的发展, 触摸控制技术已成为当今人机交互中的热 点技术。 许多产品的人机交互的方式 (如键盘、 鼠标等) 都逐渐被触摸 控制技术所代替。 在众多触控技术中, 红外触摸屏以其结构简单、 成本 低等优点被应用于多种场合, 现有的红外触摸屏一般包括安装在触摸面 板四周的印刷电路板上的红外发射元件阵列和红外接收元件阵列, 红外 发射元件阵列和红外接收元件阵列之间的光线在触摸面板形成密集的扫 描线网络, 通过检测红外发射元件阵列和红外接收元件阵列之间的扫描 线的遮挡情况来识别触摸面板内触摸物的位置和 /或大小, 这种红外触摸 屏需要两组红外发射元件阵列和两组红外接收元件阵列才能实现触摸定 位, 其生产成本比较高。
如图 1所示, 为现有技术中一种红外触摸屏及其扫描线分布示意图, 为了节约成本,只在触摸面板的两个相对的边缘上(优选尺寸较长的两个相 对边)设置包括有红外发射元件阵列 101和红外接收元件阵列 102的红外触 摸屏, 扫描时, 只在一个方向上进行扫描, 节约了成本, 并能够提高扫描 速度。 在这种红外触摸屏中, 为了实现多点触摸或者提高触摸分辨率, 需 要针对每一个红外发射元件扫描尽量大的角度, 一般采用同轴和离轴相结 合的一对多的扫描方式进行扫描, 即一个红外发射元件对应多个红外接收 元件, 相应地, 也是一个红外接收元件对应多个红外发射元件, 如一对五、 一对七或一对十一的扫描方式。 如图 2所示, 为现有技术中只在一个方向 进行扫描的实际扫描效果示意图, 图中黑色的区域为触摸物的可能区域, 根据扫描结果采取一定的去鬼点的方法, 同样可以识别触摸点, 尤其是对 于位于触摸面板中心区域的触摸点。 但是在这种一对多的扫描方式中, 由 于触摸屏尺寸的限制(不可能是无限大的), 对于位于边角附近的红外发射 元件, 只能扫描到一部分扫描线, 如图 3所示, 如果针对一个红外发射元 件本身能够扫描的宽度为 B〜D, 但是由于红外发射元件 A位于边角附近, 只能扫描位于 B〜C宽度范围内的红外接收元件, C〜D位于触摸检测区域 外, 没有安装红外接收元件, 无法扫描, 因此触摸屏边角区域的扫描线比 中心区域的少, 这种现象称之为 "边角效应" 。 在图 1 中, 对于左右两端 的两个红外发射元件, 只能扫描到位于触摸检测区域内的三条扫描线, 当 触摸物 103位于图 1中的边角区域时, 将无法识别出触摸物的具体位置, 因此边角区域的触摸效果会比较差, 严重时可能无法识别触摸物, 尤其是 对于大尺寸的红外触摸屏, 两端会有更多的发射元件的扫描线的条数少于 位于中间的红外发射元件, 因此边角效应更加明显。 发明内容
针对现有技术中存在的缺陷, 本发明所要解决的技术问题是提供一 种降低成本并能够改善边角区域的触摸效果的红外触摸屏。
为解决上述技术问题, 本发明采用的技术方案如下:
本发明提供一种红外触摸屏, 包括包含多个红外发射元件的红外发 射元件阵列、 包含多个红外接收元件的红外接收元件阵列、 第一边缘、 第二边缘、 第三边缘和第四边缘, 其中, 所述第一边缘和所述第三边缘 相对, 所述第二边缘与所述第四边缘相对, 所述红外发射元件阵列、 所 述红外接收元件阵列分别位于所述第一边缘、 所述第三边缘, 在所述第 二边缘、 所述第四边缘上分别设置有用于将射向所述第二边缘、 所述第 四边缘的光束反射至所述第三边缘的反射元件。
如上所述的红外触摸屏, 至少位于所述红外发射元件阵列的端部的 至少一个红外发射元件与所述第一边缘非垂直安装; 至少位于所述红外 接收元件阵列的端部的至少一个红外发射元件与所述第三边缘非垂直安 装。
如上所述的红外触摸屏, 与所述第一边缘非垂直安装的红外发射元 件和与所述第三边缘非垂直安装的红外接收元件的数量均为多个。
如上所述的红外触摸屏, 位于与所述第二边缘相邻的一端的与所述 第一边缘非垂直安装的多个连续或间隔的红外发射元件和与所述第三边 缘非垂直安装的多个连续或间隔的红外接收元件均朝向所述第二边缘倾 斜; 位于与所述第四边缘相邻的一端的与所述第一边缘非垂直安装的多 个连续或间隔的红外发射元件和与所述第三边缘非垂直安装的多个连续 或间隔的红外接收元件都朝向所述第四边缘倾斜。 如上所述的红外触摸屏, 所述红外发射元件阵列的端部至少包含一 个朝向所述第二边缘倾斜的红外发射元件和一个朝向所述第四边缘倾斜 的红外发射元件; 所述红外接收元件阵列的端部至少包含一个朝向所述 第二边缘倾斜的红外接收元件和一个朝向所述第四边缘倾斜的红外接收 元件。
如上所述的红外触摸屏, 位于所述红外发射元件阵列的中部的红外 发射元件与位于端部的红外发射元件的安装排布方式相同; 位于所述红 外接收元件阵列的中部的红外接收元件与位于端部的红外接收元件的安 装排布方式相同。
如上所述的红外触摸屏, 所述红外发射元件阵列包含多个发射组, 每一个所述发射组包含至少一个朝向所述第二边缘倾斜的红外发射元件 和至少一个朝向所述第四边缘倾斜的红外发射元件; 所述红外接收元件 阵列包含多个接收组, 每一个所述接收组包含至少一个朝向所述第二边 缘倾斜的红外接收元件和至少一个朝向所述第四边缘倾斜的红外接收元 件。
如上所述的红外触摸屏, 每一个所述发射组中包含两个红外发射元 件, 使红外发射元件阵列中朝向第二边缘倾斜安装的红外发射元件和朝 向第四边缘倾斜的红外发射元件相互间隔地排列; 每一个所述接收组中 包含两个红外接收元件, 使红外发射元件阵列中朝向第二边缘倾斜的红 外接收元件和朝向第四边缘倾斜的红外接收元件相互间隔地排列。
如上所述的红外触摸屏, 每一个所述发射组中包含三个红外发射元 件; 每一个所述接收组中包含三个红外接收元件。
如上所述的红外触摸屏, 每一个所述发射组中位于中间的一个红外 发射元件垂直于所述第一边缘安装, 且在位于所述红外发射元件阵列端 部的至少一个发射组中垂直于所述第一边缘安装的红外发射元件上设置 有用于防止该红外发射元件发射的光束射向所述反射元件的遮光丝印; 和 /或每一个所述接收组中位于中间的一个红外接收元件垂直于所述第 三边缘安装, 且在位于所述红外接收元件阵列端部的至少一个接收组中 垂直于所述第三边缘安装的红外接收元件上设置有用于防止该红外接收 元件接收经过所述反射元件反射的光束的遮光丝印。
如上所述的红外触摸屏, 位于所述红外发射元件阵列端部的至少一 个所述发射组中位于中间的一个红外发射元件朝向所述第二边缘和所述 第四边缘中与其距离较远的一个边缘倾斜安装, 以使该红外发射元件发 射的光束不照射到所述反射元件上。
如上所述的红外触摸屏, 所述反射元件为平面镜或高反射率的金属 片。
本发明具有的优点在于:
本发明提供的红外触摸屏, 一方面只在触摸检测区域相对的两个边 缘安装红外发射元件阵列和红外接收元件阵列, 省去了在另外两个边缘 上的红外发射元件和红外接收元件, 可以节约成本; 另一方面, 在没有 安装红外发射元件阵列和红外接收元件阵列的两个边缘上分别安装反射 元件, 用于将红外发射元件射向反射元件的光反射到红外接收元件, 可 以增加触摸屏边角区域的扫描线的密度, 提高边角效应。 附图说明
图 1为现有技术中一种红外触摸屏及其扫描线分布示意图; 图 2为现有技术中只在一个方向进行扫描的实际扫描效果示意图; 图 3为现有技术中 "边角效应" 产生原理示意图;
图 4为本发明实施例一提供的红外触摸屏结构示意图;
图 5为本发明实施例二提供的红外触摸屏结构示意图
图 6 为红外触摸屏右侧安装有反射元件与没有安装发射元件时扫描 线分布的对比图;
图 7 为安装有反射元件的与没有安装发射元件时实际扫描效果的对 比图;
图 8为本发明实施例三提供的红外触摸屏结构示意图。 具体实施方式
下面将结合具体实施方式及附图, 对本发明的技术方案进行清楚、 完整地描述。
实施例一
本实施例提供一种红外触摸屏, 如图 4所示, 包括包含有多个红外发 射元件的红外发射元件阵列 101、 包含有多个红外接收元件的红外接收元 件阵列 102和四个边缘, 这四个边缘分别为第一边缘 401、 第二边缘 402、 第三边缘 403和第四边缘 404。 其中第一边缘 401和第三边缘 402相对, 第 二边缘 402和第四边缘 404相对, 红外发射元件阵列 101安装在第一边缘 401上, 红外接收元件阵列 102安装在第三边缘 403上, 一个红外发射元件 发射的红外光至少被对面的一个红外接收元件接收, 在第二边缘 402、 第 四边缘 404上各设置一个反射元件 405、 406 , 用于将位于第一边缘 401两 端的红外发射元件射向第二边缘 402和 /或第四边缘 404的光束反射到第 三边缘 403, 被位于第三边缘 303的红外接收元件接收, 从而能够避免射 向第二边缘 402和第三边缘 403的光线没有红外接收元件接收而造成的浪 费, 也能够增加边角区域的扫描线的密度, 因此可以提高边角区域的触 摸效果; 另外只在两个边缘上设置红外发射元件阵列和红外接收元件阵 列, 可以节约成本; 再次, 扫描时, 只需要扫描一个方向, 因此也可以 提高扫描速度。
上述反射元件 405、 406可以为平面镜, 也可以为高反射率的金属片 或者其他高反射率材料制成的反射元件。
实施例二
为了防止同一个红外接收元件同时接收到同一个红外发射元件直接 发射的光束和射向反射元件后经过反射元件反射的光束造成的信号串 扰, 也就是防止一条直线光线和一条折线光线同时射向同一个红外接收 元件, 同时也为了在触摸检测区域获取倾斜角度较大的扫描线, 可以将 红外发射元件和红外接收元件倾斜一定角度安装, 即红外发射元件和红 外接收元件与第一边缘 401或第三边缘 403不垂直安装, 使在扫描红外接 收元件时, 同一时刻一个红外接收元件只能接收到一个方向的光束。 如 图 5所示, 为本实施例中红外触摸屏结构示意图, 作为一种优选方式, 为 了描述方便, 可以将位于第一边缘 401的红外发射元件阵列 101中的红外 发射元件按照位置顺序分成多个发射组 501, 每一个发射组 501中包含两 个红外发射元件, 其中一个朝向第二边缘 402倾斜安装(图 5中向右倾斜), 另一个朝向第四边缘 404倾斜安装(图 5中向左倾斜)的红外发射元件, 使 红外发射元件阵列 101中朝向第二边缘 402倾斜的红外发射元件和朝向第 四边缘 404倾斜的红外发射元件相互间隔地排列; 同样, 将位于第三边缘 403的红外接收元件阵列 102中的红外接收元件分成多个接收组 502, 每一 个接收组 502中也包含两个红外接收元件, 其中一个朝向第二边缘 402倾 斜(图 5中向右倾斜), 另一个朝向第四边缘 404倾斜(图 5中向左倾斜), 使 红外发射元件阵列 102中朝向第二边缘倾斜的红外接收元件和朝向第四 边缘 404倾斜的红外接收元件相互间隔地排列。 如果对图 5中的红外发射 元件 101从左到右按照 El、 E2…… En的顺序编号, 对红外接收元件 102从 左到右按照 Dl、 D2…… Dn的顺序编号, 序号为奇数的红外发射元件(E l、 E3……)和红外接收元件(Dl、 D3……)都向左倾斜安装, 序号为偶数的红 外发射元件(E2、 E4……)和红外接收元件(D2、 D4……)都向右倾斜安装, 通过调整红外发射元件和红外接收元件倾斜的角度, 可以改变各个扫描 线的角度, 具体的倾斜角度可以通过实验或者几何计算来获取使红外发 射元件和红外接收元件具有最佳对应关系的倾斜角度。
在进行触摸识别扫描时, 如果采用一对五的扫描方式进行扫描, 如 图 5所示, 对于位于第一边缘 401中间区域的红外发射元件, 当驱动一个 红外发射元件时, 可以依次扫描位于第三边缘 403上的、 接收面与该红外 发射元件的发射面近似相对的五个红外接收元件, 也即扫描接收面迎着 红外发射元件发射光束的传播方向的五个红外接收元件, 如对于 El l, 扫 描 D2、 D4、 D6、 D8、 D10五个红外接收元件, 对于 E12, 扫描 D13、 D15、 D17、 D19、 D21五个红外接收元件, 按照这种扫描方法可以使红外接收元 件接收的信号尽可能强, 当然也可以有其他的扫描方式。 由于每个发射 组 501和接收组 502中的红外发射元件和红外接收元件都是倾斜安装的, 每一个发射组 501相当于一个广角发射元件, 每一个接收组 502相当于一 个广角接收元件, 能够提供较大角度的倾斜扫描线, 因此可以提高触摸 屏的分辨率, 也可以识别多个触摸点。 对于位于红外发射元件阵列 101两 端部分的至少一个发射组 501, 由于触摸屏的对称性, 两端部分的扫描方 式相同, 因此为了叙述方便并节约篇幅, 只对位于右端部分的红外发射 元件和红外接收元件进行说明, 如图 5, 对于位于右端部分向左倾斜的几 个红外发射元件, 由于这些红外发射元件发射的光束都能够射向触摸面 板内, 因此可以直接被位于第三边缘 403的向右倾斜的红外接收元件接 收, 可以采用与位于红外发射元件阵列 102中间部分的红外发射元件相同 的方式扫描, 而对于位于右端部分向右倾斜安装的红外发射元件, 当其 发射的红外光束全部或者部分射向第二边缘 402上的反射元件 405时, 光 束经反射元件反射后可以被位于第三边缘 403的向右倾斜安装的红外接 收元件接收, 如图 5中红外发射元件 E 18发射的红外光束分别被位于第三 边缘 403上的红外接收元件 D20至 D24接收, 其中 D21和 D23接收由 E 18直接 发射的光线(扫描线为直线), D20、 D22、 D24接收经过反射元件 405反射 后的光线(扫描线为折线), 当驱动红外发射元件 E 18时, 接通红外接收元 件 D20至 D24进行扫描, 对于位于右端的向右倾斜的其他红外发射元件的 扫描方式相同, 不再赘述。 如图 6所示, 为红外触摸屏右侧安装有反射元 件与没有安装反射元件时扫描线分布的对比图, 其中, 右半部为安装有 反射元件的扫描线分布, 左半部为没有安装反射元件的扫描线分布, 很 明显, 在红外触摸屏的两个相对的边缘上安装反射元件后, 能够充分利 用边角区域的红外发射元件的信号, 可以大大增加边角区域的扫描线的 数量, 如图 7所示, 为安装有反射元件的与没有安装发射元件时扫描效果 的对比图, 其中, 短箭头代表红外发射元件, 且图 7是截取的触摸屏右下 部分的扫描效果图, 右半部分为安装有反射元件的扫描效果, 左半部分 为没有安装反射元件的扫描效果, 图中边角区域存在两个触摸物, 在没 有安装反射元件 405时, 其中一个扫描出的面积远大于触摸物实际的面 积, 识别精度很差, 另一个根本就无法识别, 而安装了反射元件 405后, 两个触摸物都可以检测出来, 且精度相对较高, 因此在边缘安装反射元 件 405后可以大大改善边角区域的触摸效果, 解决边角效应问题。
需要说明的是, 本实施例中所述的倾斜安装是在触摸检测区域所在 的平面或者与其平行的平面内, 红外发射元件和红外接收元件的主轴与 第一边缘或第二边缘的夹角为锐角或钝角; 本实施例中所述的垂直或非 垂直安装指红外发射元件和红外接收元件的主轴与第一边缘或第二边缘 垂直或非垂直, 这里对安装方向的说明也适用于其他实施方式。
本实施例提供一种红外触摸屏, 通过将红外发射元件和红外接收元 件倾斜安装, 可以提供较大倾斜角度的扫描线, 提高了分辨率, 也可以 实现多点触摸; 对于位于两端的向与其距离较近的一个边缘倾斜的红外 发射元件和红外接收元件, 红外发射元件发射的红外光部分或全部射向 反射元件, 经反射元件反射后, 被红外接收元件接收, 可以增加边角区 域的扫描线的密度, 大大改善边角效应。
实施例三
本实施例提供第三种红外触摸屏, 本实施例与前两种实施例相同, 都是在第一边缘、 第三边缘分别安装红外发射元件、 红外接收元件, 在 第二边缘和第四边缘各安装一个反射元件, 本实施例与前两种实施例的 不同之处在于红外发射元件和红外接收元件的安装方式。
在本实施例中, 如图 8所示, 将红外发射元件阵列 101中的所有红外 发射元件按照位置顺序分成多个发射组 801, 每一个发射组 801包含三个 红外发射元件, 其中位于中间的一个垂直第一边缘 401安装, 位于两边的 两个分别朝向第二边缘 402 (向右)和第四边缘 403 (向左)倾斜安装, 使每 两个垂直安装的红外发射元件之间有一个向右倾斜安装的红外发射元件 和一个向左倾斜安装的红外发射元件, 也可以在两个相邻的发射组 801之 间再安装一个垂直第一边缘 401的红外发射元件, 向右倾斜的红外发射元 件、 垂直安装的红外发射元件和向左倾斜安装的红外发射元件相互间隔 排列, 每一个发射组 801相当于一个广角发射元件; 同样, 将所有红外接 收元件 102分成多个接收组 802, 每一个接收组 802中的红外接收元件的安 装方向与每一个发射组 801中的红外发射元件的安装方向相同, 即位于中 间的一个垂直第三边缘 403安装, 位于两边的两个红外接收元件分别朝向 第二边缘 402和第四边缘 404倾斜安装。
对于上述排布方式的红外触摸屏,如果在进行触摸识别扫描过程中采 用一对五的扫描方式, 如图 8所示, 对于位于红外发射元件阵列 101中间部 分的红外发射元件和红外接收元件而言, 向右倾斜的红外发射元件发射的 红外光被位于对面的、 向左倾斜的红和 /或垂直安装的五个红外接收元件 接收; 向左倾斜的红外发射元件发射的红外光被位于对面的、 向右倾斜的 和 /或垂直安装的五个红外接收元件接收; 垂直安装的红外发射元件发射 的红外光被位于对面的垂直安装的五个红外接收元件接收, 也可以被与之 相对的垂直安装的红外接收元件两侧的倾斜安装的红外接收元件接收。 总 之, 为了提高接收信号的强度, 针对一个红外发射元件可以选择与其距离 较近的、 接收面迎着该红外发射元件发射的光束的红外接收元件进行扫 描。 对于位于两端部分的红外发射元件和红外接收元件, 以位于右端的红 外发射元件和红外接收元件为例进行说明, 向左倾斜的红外发射元件与红 外接收元件的对应关系与位于中间部分的一样。如果向右倾斜的红外发射 元件的全部或部分红外光射向位于第二边缘 402上的反射元件 405, 则可以 被反射元件 405反射到第三边缘 403, 被位于第三边缘 403的接收面迎着反 射光束(向左倾斜)的红外接收元件接收, 这样在触摸面板的边角附近可以 增加一些折线形式的扫描线, 可以改善边角效应, 对于位于右端的垂直于 第一边缘 401安装的红外发射元件和垂直于第三边缘 403安装红外接收元 件, 为了避免红外接收元件同时接收由红外发射元件直接发射的红外光和 经反射元件反射后发射的红外光而造成的信号串扰, 可以在该垂直于第一 边缘 401安装的红外发射元件和 /或垂直于第三边缘 403安装的红外接收元 件上设置遮光丝印, 以防止垂直安装的红外发射元件发射的光射向反射元 件和 /或垂直安装的红外接收元件接收从反射元件反射的红外光, 也可以 将位于两端的每一个发射组 801中间的红外发射元件向触摸检测区域的中 心方向倾斜安装, 也即朝向第二边缘 402和第四边缘 404中与该红外发射元 件距离较远的一个边缘倾斜安装, 右端的向左倾斜, 左端的向右倾斜, 以 使该红外发射元件发射的光束不照射到反射元件上, 从而避免同一个接收 元件同时接收两个方向上的光信号造成的信号串扰。
本实施例提供的红外触摸屏, 首先, 只在两个边缘上安装红外发射元 件和红外接收元件, 能够大大节约成本; 其次, 将所有红外发射元件和红 外接收元件分成多个发射组和接收组, 每个发射组和接收组中的红外元件 的安装方向不同, 可以作为一个广角发射元件和广角接收元件, 以提供倾 斜角度较大的扫描线, 可以提高分辨率, 也可以实现多点触摸; 再次, 通 过在没有安装红外元件的两个边缘安装反射元件, 用于将射向这两个边缘 的光线反射至安装有红外接收元件的一个边缘, 被红外接收元件接收, 可 以避免光浪费, 并触摸面板边角附近的扫描线更加密集, 可以大大改善边 角效应。
需要说明的是, 本发明中也可以只对位于红外发射元件阵列和红外接 收元件组阵列端部的红外发射元件和红外接收元件按照实施例一、 实施例 二和实施例三中的任一种所述的安装排布方式进行安装, 对于位于中部的 红外发射元件和红外接收元件可以采用现有技术中常用的垂直安装的方 式, 具体位于端部的倾斜的红外发射元件和红外接收元件的数量可以根据 实验确定, 也可以根据倾斜的角度及红外触摸屏的尺寸计算确定, 若只在 端部倾斜安装 (非垂直安装) 红外发射元件和红外接收元件, 位于同一端 的红外发射元件和红外接收元件倾斜的方向可以相同也可以不同, 当位于 端部的红外发射元件的倾斜方向不同时, 可以是向左倾斜和向右倾斜相互 间隔排列, 也可以是在两个垂直安装的红外发射元件之间安装一个向左倾 斜的红外发射元件和向右倾斜的红外发射元件, 对于位于端部的红外接收 元件的排布方式与红外发射元件的排布方式相同。 显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离 本发明的精神和范围, 如非垂直安装(倾斜安装)的红外发射元件和红外接 收元件不是等间隔分布, 或者倾斜的红外发射元件和红外接收元件的数量 为一个或者多个, 或者只在红外发射元件阵列和红外接收元件阵列的一端 具有倾斜安装的红外发射元件和红外接收元件, 倘若本发明的这些修改和 变型属于本发明权利要求及其同等技术的范围之内, 则本发明也意图包含 这些改动和变型。

Claims

权利要求书
1、 一种红外触摸屏, 包括包含多个红外发射元件的红外发射元件阵 列(101)、 包含多个红外接收元件的红外接收元件阵列(102)、 第一边缘 (401)、 第二边缘(402)、 第三边缘(403)和第四边缘(404), 其中, 所述 第一边缘(401 )和所述第三边缘(403)相对, 所述第二边缘(402)与所述第 四边缘(404)相对, 所述红外发射元件阵列(101)、 所述红外接收元件阵 列(102)分别位于所述第一边缘(401)、所述第三边缘(403),其特征在于, 在所述第二边缘(402)、 所述第四边缘(404)上分别设置有用于将射向所 述第二边缘(402)、 所述第四边缘(404)的光束反射至所述第三边缘(403) 的反射元件(405、 406)
2、 根据权利要求 1所述的红外触摸屏, 其特征在于, 至少位于所述 红外发射元件阵列(101 )的端部的至少一个红外发射元件与所述第一边 缘(401)非垂直安装; 至少位于所述红外接收元件阵列(102)的端部的至 少一个红外发射元件与所述第三边缘(403)非垂直安装。
3、 根据权利要求 2所述的红外触摸屏, 其特征在于, 与所述第一边 缘(401 )非垂直安装的红外发射元件和与所述第三边缘(403)非垂直安装 的红外接收元件的数量均为多个。
4、 根据权利要求 3所述的红外触摸屏, 其特征在于, 位于与所述第 二边缘(402)相邻的一端的与所述第一边缘(401)非垂直安装的多个连续 或间隔的红外发射元件和与所述第三边缘(403)非垂直安装的多个连续 或间隔的红外接收元件均朝向所述第二边缘(402)倾斜; 位于与所述第四 边缘(404)相邻的一端的与所述第一边缘(401 )非垂直安装的多个连续或 间隔的红外发射元件和与所述第三边缘(403)非垂直安装的多个连续或 间隔的红外接收元件均朝向所述第四边缘(404)倾斜。
5、 根据权利要求 3所述的红外触摸屏, 其特征在于, 所述红外发射 元件阵列(101)的端部至少包含一个朝向所述第二边缘(402)倾斜的红外 发射元件和一个朝向所述第四边缘(404)倾斜的红外发射元件; 所述红外 接收元件阵列(102)的端部至少包含一个朝向所述第二边缘(402)倾斜的 红外接收元件和一个朝向所述第四边缘(404)倾斜的红外接收元件。
6、 根据权利要求 2所述的红外触摸屏, 其特征在于, 位于所述红外 发射元件阵列(101)的中部的红外发射元件与位于端部的红外发射元件 的安装排布方式相同; 位于所述红外接收元件阵列(102)的中部的红外接 收元件与位于端部的红外接收元件的安装排布方式相同。
7、 根据权利要求 6所述的红外触摸屏, 其特征在于, 所述红外发射 元件阵列(101 )包含多个发射组(501 ; 801),每一个所述发射组(501 ; 801) 包含至少一个朝向所述第二边缘(402)倾斜的红外发射元件和至少一个 朝向所述第四边缘(404)倾斜的红外发射元件; 所述红外接收元件阵列 ( 102)包含多个接收组(502 ; 802), 每一个所述接收组(502 ; 802)包含至 少一个朝向所述第二边缘(402)倾斜的红外接收元件和至少一个朝向所 述第四边缘(404)倾斜的红外接收元件。
8、 根据权利要求 7所述的红外触摸屏, 其特征在于, 每一个所述发 射组(501 )中包含两个红外发射元件, 使红外发射元件阵列(101)中朝向 第二边缘(402)倾斜安装的红外发射元件和朝向第四边缘(404)倾斜的红 外发射元件相互间隔地排列; 每一个所述接收组(502)中包含两个红外接 收元件, 使红外发射元件阵列(101)中朝向第二边缘(402)倾斜的红外接 收元件和朝向第四边缘(404)倾斜的红外接收元件相互间隔地排列。
9、 根据权利要求 7所述的红外触摸屏, 其特征在于, 每一个所述发 射组(801)中包含三个红外发射元件; 每一个所述接收组(802)中包含三 个红外接收元件。
10、 根据权利要求 9 所述的红外触摸屏, 其特征在于, 每一个所述 发射组(801)中位于中间的一个红外发射元件垂直于所述第一边缘(401) 安装, 且在位于所述红外发射元件阵列(101)端部的至少一个发射组(801) 中垂直于所述第一边缘(401)安装的红外发射元件上设置有用于防止该 红外发射元件发射的光束射向所述反射元件(405、 406)的遮光丝印; 和 / 或每一个所述接收组(802)中位于中间的一个红外接收元件垂直于所述 第三边缘(403)安装, 且在位于所述红外接收元件阵列(102)端部的至少 一个接收组(802)中垂直于所述第三边缘(403)安装的红外接收元件上设 置有用于防止该红外接收元件接收经过所述反射元件(405、 406)反射的 光束的遮光丝印。
11、 根据权利要求 9 所述的红外触摸屏, 其特征在于, 位于所述红 外发射元件阵列(101)端部的至少一个所述发射组(801 )中位于中间的一 个红外发射元件朝向所述第二边缘(402)和所述第四边缘(404)中与其距 ί较远的一个边缘倾斜安装, 以使该红外发射元件发射的光束不照射到 ί述反射元件(405、 406)上。
12、根据权利要求 1至 11中任一项所述的红外触摸屏, 其特征在于, 述反射元件(405 ; 406)为平面镜或高反射率的金属片。
PCT/CN2013/080888 2012-08-10 2013-08-06 一种红外触摸屏 WO2014023218A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210285748.1 2012-08-10
CN201210285748.1A CN102799319B (zh) 2012-08-10 2012-08-10 一种红外触摸屏

Publications (1)

Publication Number Publication Date
WO2014023218A1 true WO2014023218A1 (zh) 2014-02-13

Family

ID=47198438

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/080888 WO2014023218A1 (zh) 2012-08-10 2013-08-06 一种红外触摸屏

Country Status (2)

Country Link
CN (1) CN102799319B (zh)
WO (1) WO2014023218A1 (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102799319B (zh) * 2012-08-10 2017-02-08 北京汇冠新技术股份有限公司 一种红外触摸屏
CN104281330A (zh) * 2013-07-02 2015-01-14 北京汇冠新技术股份有限公司 一种红外触摸屏及其红外元件不等间距布置方法
CN104281329A (zh) * 2013-07-02 2015-01-14 北京汇冠新技术股份有限公司 一种提高红外触摸屏边缘触摸精度的方法
CN105224143B (zh) * 2014-06-20 2019-09-20 青岛海信电器股份有限公司 一种触摸屏扫描方法、装置及触屏设备
CN104156125A (zh) * 2014-08-15 2014-11-19 广州华欣电子科技有限公司 红外触摸屏灯管收发方法以及红外触摸屏
CN104503634B (zh) * 2014-12-02 2018-07-24 昆山国显光电有限公司 一种红外线触控装置及方法
CN106406617A (zh) 2016-09-26 2017-02-15 京东方科技集团股份有限公司 触控面板及其触控检测方法以及显示装置
CN109799930B (zh) * 2019-01-15 2022-03-29 中山佳时光电科技有限公司 一种4k超高清显示触控电子白板
CN112153187B (zh) * 2019-06-28 2022-06-14 Oppo广东移动通信有限公司 电子设备及显示屏状态控制方法
CN110888559A (zh) * 2019-11-19 2020-03-17 深圳市拓思迪科技有限公司 一种具有抗强光照射的红外触摸屏

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201233592Y (zh) * 2008-08-05 2009-05-06 北京汇冠新技术有限公司 用于红外触摸屏的反射光路结构
CN201741134U (zh) * 2010-06-17 2011-02-09 北京汇冠新技术股份有限公司 一种红外发射管及触摸屏
CN102799319A (zh) * 2012-08-10 2012-11-28 北京汇冠新技术股份有限公司 一种红外触摸屏

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201556190U (zh) * 2010-01-06 2010-08-18 北京汇冠新技术股份有限公司 一种红外触摸屏
CN102419665B (zh) * 2011-08-03 2014-06-04 北京汇冠新技术股份有限公司 一种用于触摸屏的扫描方法及扫描系统
CN202257517U (zh) * 2011-08-26 2012-05-30 北京汇冠新技术股份有限公司 一种红外触摸屏

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201233592Y (zh) * 2008-08-05 2009-05-06 北京汇冠新技术有限公司 用于红外触摸屏的反射光路结构
CN201741134U (zh) * 2010-06-17 2011-02-09 北京汇冠新技术股份有限公司 一种红外发射管及触摸屏
CN102799319A (zh) * 2012-08-10 2012-11-28 北京汇冠新技术股份有限公司 一种红外触摸屏

Also Published As

Publication number Publication date
CN102799319A (zh) 2012-11-28
CN102799319B (zh) 2017-02-08

Similar Documents

Publication Publication Date Title
WO2014023218A1 (zh) 一种红外触摸屏
EP1164466B1 (en) Optical scanning touch panel
US6229529B1 (en) Write point detecting circuit to detect multiple write points
KR20140135944A (ko) 적외선 터치 모듈, 적외선 터치 스크린 패널, 및 디스플레이 디바이스
JP5306329B2 (ja) 複数の接触を検知するタッチスクリーン
US20070165008A1 (en) Compact infrared touch screen apparatus
WO2011072588A1 (zh) 一种红外触摸屏
US20100201637A1 (en) Touch screen display system
CN103970358A (zh) 用于多点红外触摸屏的光路系统和扫描检测方法
JP2000353048A (ja) 物体検出用光学ユニット及びそれを用いた位置座標入力装置
TW200928917A (en) Optical touch panel
WO2011038682A1 (zh) 触摸屏、触摸系统以及在触摸系统中对触摸物定位的方法
TW201235911A (en) An optical path for infrared touch panel
CN103268173A (zh) 一种红外触摸屏
CN86102275A (zh) 声波接触板系统
US20200212232A1 (en) Photosensitive reflector, laser induced touch device and laser touch detection method
CN202171793U (zh) 一种红外触摸屏
CN201097368Y (zh) 红外触摸屏的局部透镜抗干扰光路结构
CN202257517U (zh) 一种红外触摸屏
CN112230804B (zh) 一种显示装置
JP2012043412A (ja) 導光体及びこれを用いた光学式タッチパネル
US20180052549A1 (en) Touch display system and touch operation device
TWI399682B (zh) 光學式觸控裝置及其運作方法
CN202771400U (zh) 改变光的传输路径的光学触摸屏
CN202230464U (zh) 无边框多点表面声波触摸屏

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13827814

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205N DATED 16/04/2015)

122 Ep: pct application non-entry in european phase

Ref document number: 13827814

Country of ref document: EP

Kind code of ref document: A1