WO2012025022A1 - 一种红外线触摸屏 - Google Patents

一种红外线触摸屏 Download PDF

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Publication number
WO2012025022A1
WO2012025022A1 PCT/CN2011/078439 CN2011078439W WO2012025022A1 WO 2012025022 A1 WO2012025022 A1 WO 2012025022A1 CN 2011078439 W CN2011078439 W CN 2011078439W WO 2012025022 A1 WO2012025022 A1 WO 2012025022A1
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Prior art keywords
infrared
tube
touch screen
tubes
receiving
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PCT/CN2011/078439
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English (en)
French (fr)
Inventor
齐洋
冯炎
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湖州佳格电子科技有限公司
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Publication of WO2012025022A1 publication Critical patent/WO2012025022A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen

Definitions

  • the present invention relates to a touch screen, and more particularly to an infrared touch screen.
  • the infrared touch screen shown in Figure 1 includes two sets of infrared transmitting tubes, two sets of infrared receiving tubes and a touch detection area, wherein one set of infrared transmitting tubes and one set of infrared receiving tubes are laterally mounted, one set of infrared transmitting tubes and one set of infrared receiving.
  • the longitudinal installation of the tube when the operation object enters the touch detection area, the horizontally mounted infrared emission tube and the infrared receiving tube obtain the abscissa of the position where the operation object is located, and the longitudinally mounted infrared emission tube and the infrared receiving tube obtain the ordinate of the position of the operation object
  • the solution requires two sets of infrared transmitting tubes and infrared receiving
  • the publication No. CN201548935 discloses an infrared touch screen, which comprises a set of infrared transmitting tubes, a set of infrared receiving tubes and a touch detecting area, and the infrared emitting tubes and the infrared receiving tubes are respectively mounted on the opposite sides of the touch detecting area. Side;
  • the scheme only needs a set of infrared transmitting tubes and infrared receiving tubes, which has low cost, but the precision is not high, and it is easy to be affected by ambient light, resulting in misoperation.
  • the present invention provides an infrared line touch screen with low cost and high operation precision.
  • an infrared touch screen comprising an infrared tube row and a touch detection area composed of an infrared tube, wherein the infrared tube comprises an infrared emission tube and an infrared receiving tube, wherein: the infrared tube row
  • the infrared tube rows on at least one side of the touch detection area are arranged on the opposite sides of the touch detection area, and the infrared emission tube and the infrared receiving tube are alternately arranged.
  • ambient light includes infrared light
  • these infrared rays tend to have a certain directionality, on one side.
  • the infrared receiving tube receives the infrared light in the ambient light. At this time, the infrared light in the ambient light may seriously interfere with the infrared light emitted by the infrared emitting tube.
  • the staggered infrared receiving tube can not only receive the strong infrared rays emitted by the opposite side infrared emitting tubes, but also receive the weak infrared rays emitted by the same side infrared emitting tubes and reflected by the operating objects.
  • the source of the received infrared ray is distinguished, and the operation object can be more accurately positioned by calculation; at the same time, by directly calculating the direct and reflected infrared rays, the touch can be A plurality of different operators in the detection area are positioned.
  • the infrared emission tube LED emission tube has an emission angle of 90-160 degrees.
  • the launch angle is large, there are many infrared receiving tubes that can be received, the operating object coordinate data is rich, and the positioning is more accurate.
  • the staggered arrangement is an interphase arrangement.
  • the infrared emitting tube and the infrared receiving tube are arranged in phase, so that the positioning resolution and the positioning precision of the entire touch detection area are uniform, and the touch detection is more stable; the infrared transmitting tube and the infrared receiving tube are arranged in a single and uniform manner, so that the two sides of the touch detecting area are located.
  • the infrared transmitting tube and the infrared receiving tube have the same driving circuit, which saves board cost.
  • the staggered arrangement is: two or more infrared transmitting tubes constitute a transmitting group, and two or more infrared receiving tubes constitute a receiving group, and the transmitting group and the receiving group are arranged in phase.
  • the edge of the touch detection area increases the arrangement density of the infrared reception, so that the edge of the touch detection area has higher positioning resolution and positioning accuracy, and solves the problem that most touch screen edges are less effective.
  • the infrared touch screen is further provided with a rectangular frame, and the infrared emitting tube and the infrared receiving tube are mounted on two longer sides of the frame.
  • the infrared touch screen is further provided with a rectangular frame, and the infrared emitting tube and the infrared receiving tube are mounted on the two shorter sides of the frame.
  • the infrared tube row portion is outside the touch detection area. It is guaranteed that it can be positioned anywhere in the touch detection area.
  • the infrared transmitting tube and the infrared receiving tube are staggered, which are not easily interfered by ambient light, and the positioning is accurate and the precision is high;
  • the infrared receiving tube can not only receive the strong infrared rays emitted from the opposite side infrared emitting tubes, but also receive the weak infrared rays emitted by the same side infrared emitting tubes and reflected by the operating objects, and the positioning accuracy is high;
  • FIG. 1 is an infrared touch screen of the prior art
  • FIG. 2 is an infrared touch screen disclosed in CN201548935
  • FIG. 3 is a schematic structural view of a first embodiment of the present invention
  • FIG. 5 is a schematic structural view of a second embodiment of the present invention
  • FIG. 6 is a schematic structural view of a third embodiment of the present invention.
  • Embodiment 1 An infrared touch screen, as shown in FIG. 3, comprises two infrared tube rows and a rectangular frame 4, and the infrared tube row is composed of a plurality of infrared emission tubes 1 and a plurality of infrared receiving tubes 2, and the infrared emission tube 1 and the infrared receiving tube 2 are arranged in phase, the infrared emitting tube 1 and the infrared receiving tube 2 are mounted on the sides of two shorter frames 4, the infrared emitting tube 1 is an LED emitting tube, the emission angle is 150 degrees; 2 infrared tube rows A touch detection area 3 is disposed in the space enclosed therebetween, and two infrared tube rows are respectively mounted on opposite sides of the touch detection area 3, and the infrared tube row portion is outside the touch detection area 3.
  • all the infrared emission tubes 1 are turned on at a certain frequency for a certain period of time and then turned off.
  • the operation object 6, such as a finger or a stylus pen enters the touch detection area 3 and stays for a certain time, as shown in the figure
  • At least two direct light paths 5 are blocked by the operating object 6, so that the infrared receiving tube 2 cannot receive the infrared rays emitted from the infrared transmitting tube 1 on the opposite side, according to the position of the illuminated infrared transmitting tube 1 and cannot be received.
  • the position of the operating object 7 can be calculated by the triangle similarity principle, and at the same time, the infrared receiving tube 2 receives the infrared ray emitted from the infrared emitting tube 1 on the same side and reflected by the operating object 7, such as
  • the reflected light path 6 in the figure further positions the position of the operating object 7 by the position of the illuminated infrared transmitting tube 1 and the position of the infrared receiving tube 2 that receives the reflected infrared rays; when there are a plurality of operating objects 7,
  • the positioning operation is performed in multiple times at the same time, and the positions of the plurality of operators 7 are obtained.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the difference from the first embodiment is that the infrared emission tube 1 has an emission angle of 90 degrees, and the middle portion of the touch detection area is provided with three infrared receiving tubes 2 in the middle of the adjacent infrared emission tube 1, and the touch is In the edge region of the detection area, there is one infrared receiving tube 2 in the middle of the adjacent infrared transmitting tube 1.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the infrared detection tube 1 and the infrared receiving tube 2 on the side of the touch detection area are arranged in phase, opposite sides Only the infrared receiving tube 2 is arranged.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Position Input By Displaying (AREA)

Description

一种红外线触摸屏 技术领域 本发明涉及一种触摸屏， 尤其涉及一种红外线触摸屏。 背景技术 红外线触摸屏技术以其稳定性高、 适应性强， 被广泛应用。 如图 1 所示红外线触摸屏， 包括两组红外发射管、 两组红外接收管和触摸 检测区域， 其中一组红外发射管和一组红外接收管横向安装， 一组红外发射管 和一组红外接收管纵向安装， 当操作物进入触摸检测区域时， 横向安装的红外 发射管和红外接收管取得操作物所在位置的横坐标， 纵向安装的红外发射管和 红外接收管取得操作物所在位置的纵坐标， 以此来对操作物定位； 该方案须两 组红外发射管和红外接收管以及驱动电路， 成本较高。 如图 2所示，公开号为 CN201548935公开了一种红外线触摸屏， 包括一组红 外发射管、 一组红外接收管和触摸检测区域， 红外发射管和红外接收管分别安 装于触摸检测区域相对的两侧； 该方案仅须一组红外发射管和红外接收管， 成 本较低， 但精度不高， 易被环境光影响， 产生误操作。 实用新型内容 本实用新型为解决现有技术问题， 提供一种成本低廉， 操作精度高的红外 线触摸屏。 本实用新型的技术方案是： 一种红外线触摸屏， 包括由红外管组成的红外 管排和触摸检测区域， 所述的红外管包括红外发射管和红外接收管， 其特征在 于： 所述红外管排安装于所述触摸检测区域相对的两侧， 且至少一侧的红外管 排由红外发射管和红外接收管交错排列而成。
当环境光中包括红外线时， 这些红外线往往具有一定的方向性， 处于一侧 的红外接收管如正好处于环境光的照射范围内时， 红外接收管会接收到环境光 中的红外线， 此时， 环境光中的红外线会对红外发射管发射出的红外线产生极 严重的干扰， 造成触摸屏的误操作； 当红外发射管和红外接收管交错排列时， 处于环境光照射范围内的红外线接收管受到环境光的干扰， 但处于相对侧的红 外线接收管不会受到干扰， 仍能对操作物作出精确定位； 交错排列后的红外接 收管不但能接收到相对侧红外线发射管发出的较强的红外线， 还能接收到相同 侧红外线发射管发出并经过操作物反射回的较弱的红外线， 通过对接收到这两 种红外线强度的判断， 区分出接收到的红外线的来源， 并通过计算， 可更精确 对操作物进行定位； 同时， 通过对直射和反射红外线进行计算， 可对处于触摸 检测区域内的多个不同的操作物进行定位。
作为优选， 所述红外发射管 LED发射管， 发射角度为 90-160度。 发射角度 大， 则可接收的红外线接收管多， 操作物坐标数据丰富， 定位更准确。
作为优选， 所述的交错排列为相间排列。 红外发射管和红外接收管相间排 列， 使得整个触摸检测区域操作物定位分辨率和定位精度均一， 触摸检测更稳 定； 红外发射管和红外接收管排列方式单一、 均匀， 使得处于触摸检测区域两 侧的红外发射管和红外接收管的驱动电路相同， 节约电路板成本。
作为优选， 所述的交错排列为： 两个或多个红外发射管组成发射组， 两个 或多个红外接收管组成接收组， 所述发射组和接收组相间排列。 根据需要在触 摸检测区域的不同部分增加或减小红外接收管的排列密度， 使得触摸检测区域 的不同部分具有不同的操作物定位分辨率和定位精度， 以使触摸屏适用多种不 同的场合； 在触摸检测区域的边缘加大红外接收的排列密度， 使得触摸检测区 域的边缘具有更高的定位分辨率和定位精度， 解决了大多数触摸屏边缘效果较 差的问题。 作为优选， 所述红外线触摸屏还设置有长方形的框架， 所述红外线发射管 和红外接收管安装在框架的两条较长边上。
作为优选， 所述红外线触摸屏还设置有长方形的框架， 所述红外线发射管 和红外接收管安装在框架的两条较短边上。
作为优选， 红外管排部分处于触摸检测区域外。 保证在触摸检测区域内任 意位置均能定位。
综上所述， 本实用新型具有以下优点：
1、 红外发射管和红外接收管交错排列， 不易受环境光干扰， 定位准确， 精 度高；
2、 红外接收管不但能接收相对侧红外线发射管发出的较强的红外线， 还能 接收到相同侧红外线发射管发出并经过操作物反射回的较弱的红外线， 定位精 度高；
3、 红外触摸屏的发射和接收驱动电路采用相同设计， 节约成本。 附图说明 图 1为现在技术的一种红外线触摸屏； 图 2为公开号为 CN201548935公开的红外线触摸屏； 图 3为本实用新型实施例一结构示意图； 图 4为实施例一中两个操作物处于触摸检测区域时光路示意图； 图 5为本实用新型实施例二结构示意图； 图 6为本实用新型实施例三结构示意图。 图中， 1、 红外发射管， 2、 红外接收管， 3、 触摸检测区域， 4、 框架， 5、 直射光路， 6、 反射光路， 7、 操作物。 具 头施万
下面结合附图以实施例对本实用新型作进一步说明。
实施例一： 一种红外线触摸屏， 如图 3所示， 包括 2条红外管排和长方形的框架 4 , 红 外管排由多个红外发射管 1和多个红外接收管 2组成， 且红外发射管 1和红外 接收管 2相间排列， 红外线发射管 1和红外接收管 2安装于两条较短的框架 4 边上， 红外发射管 1为 LED发射管， 发射角度为 150度； 2条红外管排之间围成 的空间内设置有触摸检测区域 3 , 2条红外管排分别安装于触摸检测区域 3相 对的两侧， 红外管排部分处于触摸检测区域 3之外。 工作时， 所有的红外线发射管 1 以一定频率依次点亮一定时间后熄灭， 当 操作物 6 , 如手指、 触控笔等， 进入触摸检测区域 3内并停留一定时间时， 如图
4所示， 至少有两条直射光路 5被操作物 6挡住， 而使得红外接收管 2无法接收 到相对侧的红外发射管 1发射的红外线， 根据点亮的红外发射管 1 的位置和无 法接收到直射红外线的红外接收管 2 的位置， 通过三角形相似原理可计算得操 作物 7的位置， 同时， 红外接收管 2接收到同侧的红外发射管 1发出并经过操 作物 7反射的红外线， 如图中的反射光路 6 , 通过对点亮的红外发射管 1的位置 和接收到反射红外线的红外接收管 2的位置， 对操作物 7的位置进行进一步定 位； 当有多个操作物 7时， 将定位操作分多次同时进行， 可得多个操作物 7的 位置。
实施例二：
如图 5所示， 与实施例一的不同之处在于， 红外发射管 1的发射角度为 90 度， 触摸检测区域中间区域， 相邻红外发射管 1中间间隔有 3个红外接收管 2 , 触摸检测区域边缘区域， 相邻红外发射管 1中间间隔有 1个红外接收管 2。
实施例三：
n^ b ^头施 1列一的不问 ^ 亇， ¾ ^反翁官 丄 的反翁用度 丄 度， 触摸检测区域 3—侧的红外发射管 1和红外接收管 2相间排列， 相对侧仅 排列红外接收管 2。

Claims

1、 一种红外线触摸屏， 包括由红外管组成的红外管排和触摸检测区域， 所述的 红外管包括红外发射管和红外接收管， 其特征在于： 所述红外管排安装于所述 触摸检测区域相对的两侧， 且至少一侧的红外管排由红外发射管和红外接收管 交错排列而成。
2、 根据权利要求 1所述红外线触摸屏， 其特征在于： 所述红外发射管为 LED发 射管， LED发射管的发射角度为 90 ~ 1 50度。
3、 根据权利要求 1所述红外线触摸屏， 其特征在于： 所述的交错排列为相间排 列。
4、 根据权利要求 1所述红外线触摸屏， 其特征在于： 所述的交错排列为： 两个 或多个红外发射管组成发射组， 两个或多个红外接收管组成接收组， 所述发射 组和接收组相间排列。
5、 根据权利要求 1或 2或 3或 4所述红外线触摸屏， 其特征在于： 所述红外线 触摸屏还设置有长方形的框架， 所述红外线发射管和红外接收管安装在框架的 两条较长边上。
6、 根据权利要求 1或 2或 3或 4所述红外线触摸屏， 其特征在于： 所述红外线 触摸屏还设置有长方形的框架， 所述红外线发射管和红外接收管安装在框架的 两条较短边上。
7、 根据权利要求 1或 2或 3或 4所述所述红外线触摸屏， 其特征在于： 红外管 排部分处于触摸检测区域外。
PCT/CN2011/078439 2010-08-27 2011-08-15 一种红外线触摸屏 WO2012025022A1 (zh)

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CN102360256B (zh) * 2011-09-26 2013-09-18 无锡宇科万通科技有限公司 一种光学触摸屏装置
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CN103019460B (zh) * 2011-09-28 2017-03-01 上海优熠电子科技有限公司 双边组合式触摸屏
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CN105094464A (zh) * 2015-08-05 2015-11-25 深圳市华星光电技术有限公司 红外触控装置
CN108873089A (zh) * 2018-08-24 2018-11-23 中控智慧科技股份有限公司 一种红外检测装置及安检机及安检通道及机械设备
CN110941022B (zh) * 2018-09-25 2022-04-01 杭州海康威视数字技术股份有限公司 一种闸机的红外检测装置、方法和闸机
CN110442260A (zh) * 2019-07-17 2019-11-12 广州华欣电子科技有限公司 一种红外触摸屏的边框结构、红外触摸屏及红外触摸设备
CN110764658A (zh) * 2019-09-23 2020-02-07 深圳市天英联合教育股份有限公司 红外触控装置、扫描方法及红外触控设备

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