WO2014000511A1 - Infrared touchscreen - Google Patents

Infrared touchscreen Download PDF

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Publication number
WO2014000511A1
WO2014000511A1 PCT/CN2013/075373 CN2013075373W WO2014000511A1 WO 2014000511 A1 WO2014000511 A1 WO 2014000511A1 CN 2013075373 W CN2013075373 W CN 2013075373W WO 2014000511 A1 WO2014000511 A1 WO 2014000511A1
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WO
WIPO (PCT)
Prior art keywords
infrared
tubes
group
touch screen
frame
Prior art date
Application number
PCT/CN2013/075373
Other languages
French (fr)
Chinese (zh)
Inventor
程海新
刘新斌
Original Assignee
北京汇冠新技术股份有限公司
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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 WO2014000511A1 publication Critical patent/WO2014000511A1/en

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Classifications

    • 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 invention relates to an infrared touch screen. Background technique
  • Infrared touch screens are used in a variety of harsh environments due to their stable operation.
  • the infrared touch screen is a circuit board outer frame mounted on the front of the display, and the infrared transmitting tube and the infrared receiving tube are arranged on four sides of the outer frame of the circuit board.
  • the infrared transmitting tube and the infrared receiving tube are disposed on the frame. Opposite the two sides, thus forming a crossed infrared matrix.
  • the infrared receiving tube of the infrared direct touch screen is encountered in the sunlight.
  • the strong light directly illuminates the infrared receiving tube the light of the infrared receiving tube is easily saturated.
  • the standard for measuring the anti-light performance of infrared touch screen is the incident angle of sunlight when 100,000 LUX (9mW/ C m2) is used. The smaller the incident angle of sunlight saturated by the infrared receiving tube of the infrared touch screen, the better the anti-light performance of the infrared touch screen.
  • infrared touch screens in order to resist glare, use an infrared receiving tube to move outward, that is, when performing PCB layout, in order to avoid direct illumination of the infrared receiving tube under strong light conditions, infrared is caused.
  • the light of the receiving tube is saturated, so that the infrared receiving tube disposed on the border of the touch screen is moved as far as possible from the touch detecting area to the outside of the frame when the PCB is laid.
  • some infrared touch screens also use narrow-band filter strips to filter bright light.
  • the above-mentioned method of shifting the infrared receiving tube and adopting the narrow-band filter strip has limitations, and the light-resisting effect is not ideal. Because on the one hand, the infrared receiving tube moves outward, which causes the width of the border of the infrared touch screen to become larger, and the infrared receiving tube is only disposed outside the frame, resulting in the space inside the frame. Waste. On the other hand, the existing narrow-band filter strips are relatively short in length, and the entire touch screen is formed by using a plurality of strips.
  • the present invention provides an infrared touch screen for providing better light resistance.
  • the present invention provides an infrared touch screen including a bezel and a plurality of infrared transmitting tubes and a plurality of infrared receiving tubes disposed on at least one side of the bezel, wherein the plurality of infrared transmitting tubes are adjacent to the The inner side of the frame is disposed, and the plurality of infrared receiving tubes are disposed adjacent to an outer side of the frame.
  • the infrared touch screen further includes a reflecting member disposed on one side of the frame, and the other side of the frame opposite to a side on which the reflecting member is disposed is disposed a plurality of infrared transmitting tubes and the plurality of infrared receiving tubes.
  • the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes are disposed on each of the opposite sides of the bezel.
  • an infrared transmitting tube disposed on one side of the frame and an infrared receiving tube disposed on the opposite side of the frame constitute a first group of infrared elements
  • the opposite infrared transmitting tube on the other side constitutes a second group of infrared elements
  • the first group of infrared elements fails or the intensity of infrared light emitted by the infrared emitting tubes in the first group of infrared elements
  • the first set of infrared elements is deactivated when the difference between the intensity of the infrared light received by the infrared receiving tubes in the first set of elements is greater than a predetermined value, and the second set of infrared elements is enabled.
  • the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes are disposed on each of the four sides of the bezel.
  • one of the opposite infrared transmitting tubes and the infrared receiving tube on a pair of opposite sides of the frame constitutes a first group of infrared elements
  • the other pair of opposite infrared emitting tubes and infrared receiving tubes constitute a second group of infrared An element
  • a pair of opposite infrared transmitting tubes and an infrared receiving tube on the opposite pair of sides of the frame constitute a third group of infrared elements
  • the transmitting tube and the infrared receiving tube constitute a fourth group of infrared elements, the first group of infrared elements and/or the third group of infrared elements failing, or the first group of infrared elements and/or the third group
  • the infrared receiving tube of the infrared element is in a light saturation state
  • the first group of infrared elements and/or the third group of infrared elements are deactivated
  • the plurality of infrared transmitting tubes are equally arranged in a row
  • the plurality of infrared receiving tubes are equally arranged in a row
  • the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes are disposed at a cross.
  • the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes are disposed at different heights from a touch detection area surrounded by the side frames.
  • the infrared touch screen further includes a filter strip, wherein the filter strip is mounted on the frame, preferably at least one side of the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes.
  • the infrared touch screen further includes a main control unit, a transmission control circuit, a sampling circuit, an analog-to-digital conversion circuit, and a receiving control circuit, wherein the emission control circuit is electrically connected to the plurality of infrared transmitting tubes, and the receiving control circuit and the plurality of The infrared receiving tube is electrically connected, the plurality of infrared receiving tubes, the sampling circuit and the analog to digital conversion circuit are sequentially electrically connected, the main control unit and the transmitting control circuit, the receiving control circuit, and the The analog to digital conversion circuit is electrically connected.
  • the infrared touch screen further includes a filter circuit and an amplification circuit, and the filter circuit and the amplification circuit are electrically connected between the sampling circuit and the analog to digital conversion circuit.
  • the infrared emission tube is arranged close to the outer side of the frame of the touch screen, and the infrared light-emitting tube and the infrared receiving tube are arranged at a staggered interval, thereby greatly reducing the direct light infrared receiving tube of the incident light in the case of strong light.
  • FIG. 1 is a schematic structural view of an infrared touch screen according to the present invention.
  • FIG. 2 is a block diagram showing the circuit structure of an infrared touch screen according to the present invention. detailed description
  • FIG. 1 is a schematic structural view of an infrared touch screen according to the present invention.
  • the present invention provides an infrared touch screen including a frame and a plurality of infrared transmitting tubes 2 and a plurality of infrared receiving tubes 3 disposed on at least one side of the frame, wherein the plurality of The infrared emitting tube 2 is disposed near the inner side of the frame, and the plurality of infrared receiving tubes 3 are disposed adjacent to the outer side of the frame.
  • At least one side of the frame of the infrared touch screen is provided with an infrared emitting tube 2, and an infrared receiving tube 3 is also provided, and an area enclosed by the border is a touch detecting area.
  • a plurality of infrared transmitting tubes 2 are disposed near the inner side of the frame, and a plurality of infrared receiving tubes 3 are disposed near the outer side of the frame, so that the infrared transmitting tube 2 is moved away from the touch.
  • the inner shielding portion of the frame may directly illuminate the illuminating light of the infrared receiving tube 3, reduce the exposed area of the infrared transmitting tube 2, and greatly reduce the possibility of the direct light receiving the infrared receiving tube 3, thereby improving the anti-light of the infrared touch screen.
  • the infrared emission tube 2 is arranged near the inner side of the frame, and the inner space of the frame is utilized, which does not waste the space of the frame.
  • a plurality of infrared transmitting tubes 2 and a plurality of infrared receiving tubes 3 may be disposed only on one side of the frame of the infrared touch screen, or multiple infrared transmitting tubes 2 and more may be disposed on two sides of the frame of the infrared touch screen.
  • the infrared receiving tube 3 can also be provided with a plurality of infrared transmitting tubes 2 and a plurality of infrared receiving tubes 3 on the four sides of the frame of the infrared touch screen.
  • the infrared touch screen may further include a reflective component, the reflection a component is disposed on one side of the frame, and the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 are disposed on the other side of the frame opposite to the side on which the reflecting member is disposed .
  • the infrared light beam emitted from the infrared transmitting tube 2 disposed on the other side is reflected by the reflecting member on the opposite side and can be disposed on the same side as the infrared transmitting tube 2 Or the plurality of infrared receiving tubes 3 are received, thereby forming one or more infrared reflected light paths in the touch detection area, and sequentially selecting the infrared transmitting tube 2 and the infrared receiving tube 3, and determining whether the infrared reflecting light path is blocked, Determine if there is a touch in the touch detection area.
  • the specific strobing manner of the infrared transmitting tube 2 and the infrared receiving tube 3 is not limited as long as the position of the touch object in the touch detecting area can be determined by calculation.
  • the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 may be disposed on each of the opposite sides of the bezel.
  • the infrared transmitting tube 2 disposed on one side of the bezel and the infrared receiving tube 3 disposed on the opposite side of the frame constitute a first group of infrared elements, on the one side of the bezel
  • the infrared receiving tube 3 provided above and the infrared emitting tube 2 on the opposite side of the other side constitute a second group of infrared elements.
  • the infrared light beam emitted by the infrared transmitting tube 2 in the first group of infrared elements is received by the infrared receiving tube 3 of the first group of infrared elements, thereby forming one or more infrared light paths in the touch detection area, and sequentially strobing the first
  • the infrared transmitting tube 2 and the infrared receiving tube 3 in the infrared element are grouped, and it is judged whether or not the infrared light path is blocked to determine whether there is a touch object in the touch detection area.
  • the first group of infrared elements fails, or the infrared receiving tube 3 of the first group of infrared elements is in a state of light saturation or the like (for example, when determining the intensity of the infrared light emitted by the infrared transmitting tube 2 and the infrared receiving tube 3
  • the difference between the received light intensity of the infrared light is greater than a predetermined value, determining that the infrared receiving tube 3 is saturated with light
  • the first group of infrared elements may be deactivated, and the second group of infrared elements may be enabled to emit and receive the infrared beam. Thereby determining whether there is a touch object in the touch detection area.
  • the specific strobing manner of the infrared transmitting tube 2 and the infrared receiving tube 3 is not limited as long as the position of the touch object in the touch detection area can be determined by calculation.
  • the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 may be disposed on each of the four sides of the bezel.
  • four sets of infrared elements may be formed, that is, one of the opposite sides of the pair of opposite sides of the frame may be the first group of infrared elements, and the infrared receiving tube 3 may constitute a first group of infrared elements.
  • the opposite infrared transmitting tubes 2 and the infrared receiving tubes 3 may constitute a second group of infrared elements.
  • one of the opposite pairs of infrared transmitting tubes 2 and infrared receiving tubes 3 on the opposite pair of sides of the frame may constitute the first Three sets of infrared elements
  • another set of opposing infrared emitting tubes 2 and infrared receiving tubes 3 may constitute a fourth set of infrared elements.
  • the infrared light beam emitted by the infrared emitting tube 2 in the first group of infrared elements is received by the infrared receiving tube 3 of the first group of infrared elements, and the infrared light beam emitted by the infrared emitting tube 2 in the third group of infrared elements is subjected to the third group of infrared rays.
  • the infrared receiving tube 3 of the component receives, thereby forming a grid-shaped infrared beam array in the touch detection area, and sequentially stroking the infrared transmitting tube 2 and the infrared receiving tube 3 in the first group of infrared elements and the third group of infrared elements
  • the infrared transmitting tube 2 and the infrared receiving tube 3 determine whether or not the infrared light path is blocked to determine whether there is a touch object in the touch detection area.
  • the first group of infrared elements and/or the third group of infrared elements fails, or the first group of infrared elements and/or the infrared receiving tubes 3 of the third group of infrared elements are in a state of light saturation
  • the first A set of infrared elements and/or a third set of infrared elements and a second set of infrared elements and/or a fourth set of infrared elements are enabled to emit and receive infrared beams to determine if there is a touch in the touch detection area.
  • the specific gating manner of the infrared transmitting tube 2 and the infrared receiving tube 3 is not limited as long as the position of the touch object in the touch detection area can be determined by calculation.
  • the plurality of infrared transmitting tubes 2 are equally arranged in a row
  • the plurality of infrared receiving tubes 3 are equally arranged in a row
  • the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 are arranged in a cross Therefore, the optical path between the infrared receiving tube 3 and the infrared transmitting tube 2 is unobstructed.
  • the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes may be disposed at different heights from the touch detection area enclosed by the frame, such that the infrared receiving tube and the infrared transmitting tube are not in one plane. , so that the infrared emission tube does not affect the infrared receiving tube to receive the infrared beam.
  • the plurality of infrared transmitting tubes 2 may be light emitting diodes, and the plurality of infrared receiving tubes 3 may be receiving transistors.
  • the infrared touch screen may further include a filter strip, and the filter strip is mounted on the frame and disposed with the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes The inner side of at least one side of the 3, so that the strong light can be further filtered to avoid light saturation of the infrared receiving tube 3.
  • FIG. 2 is a block diagram showing the circuit structure of an infrared touch screen according to the present invention.
  • the infrared touch screen may further include a main control unit 9, a transmission control circuit 1, a sampling circuit 4, an analog-to-digital conversion circuit 7, and a reception control circuit 8, the emission control circuit 1 and the a plurality of infrared transmitting tubes 2 are electrically connected, the receiving control circuit 8 is electrically connected to the plurality of infrared receiving tubes 3, and the plurality of infrared receiving tubes 3, the sampling circuit 4 and the analog to digital conversion circuit 7 are The sub-control unit 9 is electrically connected to the transmission control circuit 1, the reception control circuit 8, and the analog-to-digital conversion circuit 7.
  • the emission control circuit 1 is configured to gate the infrared emission tube 2 to drive the infrared emission tube 2 to sequentially emit light
  • the reception control circuit 8 is configured to gate the infrared receiving tube 3 to activate one or more infrared receiving tubes.
  • the infrared receiving tube 3 converts the received infrared light into a current signal
  • the current signal is converted into a voltage signal by the sampling circuit 4
  • the sampling circuit 4 can be, but is not limited to, a sampling resistor
  • the number conversion circuit 7 converts the voltage signal into a digital signal, and inputs the digital signal to the main control unit 9, the main control unit 9 receives the digital signal and processes the digital signal, for example, calculating the digital signal.
  • the infrared touch screen may further comprise a filtering circuit 5 and an amplifying circuit 6, the filter circuit 5 and the amplifying circuit 6 being electrically connected to the sampling circuit 4 and the analog to digital conversion Between circuits 7.
  • the filter circuit 5 is for using a voltage received from the sampling circuit 4
  • the signal is filtered, and the filtered signal is output to an amplifying circuit 6, which amplifies the signal received from the filter circuit 5, and outputs the amplified signal to the analog-to-digital conversion circuit 7. .
  • the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 may be disposed on each of the four sides of the frame of the infrared touch screen.
  • the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 are arranged in a front-back direction.
  • a plurality of infrared transmitting tubes 2 and a plurality of infrared receiving tubes 3 disposed on four sides may constitute four sets of infrared elements, that is, a pair of opposite infrared transmitting tubes 2 and infrared receiving tubes 3 on a pair of opposite sides of the bezel
  • a first set of infrared elements can be formed, and another set of opposing infrared emitter tubes 2 and infrared receiver tubes 3 can form a second group of infrared elements, similarly, one of the opposite pairs of opposite sides of the bezel is opposite to infrared emission.
  • the tube 2 and the infrared receiving tube 3 may constitute a third group of infrared elements, and the other group of opposite infrared transmitting tubes 2 and infrared receiving tubes 3 may constitute a fourth group of infrared elements.
  • the main control unit 9 controls the transmission control circuit 1 and the reception control circuit 8, and further drives the infrared emission tube 2 and the infrared receiving tube 3 through the emission control circuit 1 and the reception control circuit 8.
  • the first group of infrared elements and the third group of infrared elements can be activated to operate, and the infrared light beam emitted by the infrared emitting tube 2 of the first group of infrared elements is received by the infrared receiving tube 3 of the first group of infrared elements, third The infrared light beam emitted by the infrared emitting tube 2 in the infrared component is received by the infrared receiving tube 3 in the third group of infrared elements, thereby forming a grid-shaped infrared beam array in the touch detection area, and the main control unit 9 passes through the control station.
  • the emission control circuit 1 and the reception control circuit 8 sequentially gate the infrared emission tube 2 and the infrared receiving tube 3 of the first group of infrared elements and the infrared emission tube 2 and the infrared receiving tube 3 of the third group of infrared elements. And according to the received digital signal representing the state of the infrared light received by the infrared receiving tube 3, directly calculating or transmitting the digital signal to the CPU or other processing unit for calculation to determine whether an infrared light path is blocked, thereby determining the touch Check if there is a touch object in the area and determine the location of the touch point.
  • the main control unit 9 can control the switching manner of switching the infrared transmitting tube 2 and the infrared receiving tube 3 according to the calculation result, for example, switching from the plurality of infrared receiving tubes 3 at one time to switching one infrared receiving tube 3 at a time.
  • the emission control circuit 1 and/or the reception control circuit 8 may be controlled to disable the first group of infrared elements and/or the third group of infrared elements, enabling the second group of infrared elements and/or Four sets of infrared elements are used to transmit and receive infrared beams to determine if there is a touch in the touch detection area. It can be understood that the specific strobing manner of the infrared transmitting tube 2 and the infrared receiving tube 3 is not limited as long as the position of the touch object in the touch detection area can be determined by calculation.
  • the infrared emitting tube 2 is arranged close to the outer side of the frame, and the infrared light emitting tube and the infrared receiving tube 3 are arranged at a staggered interval, thereby greatly reducing the direct incident infrared light in the case of strong light.

Abstract

Provided in the present invention is an infrared touchscreen. The infrared touchscreen comprises an edge frame and, arranged on at least one edge of the edge frame, multiple infrared-emitting transistors (2) and multiple infrared-receiving transistors (3), where the multiple infrared-emitting transistors (2) are arranged in proximity to the inside of the edge frame, and where the multiple infrared-receiving transistors (3) are arranged in proximity to the outside of the edge frame. Utilization of the infrared touchscreen of the present invention greatly reduces in bright light conditions the possibility of direct radiance of an incident light on the infrared-receiving transistors, thus preventing light saturation of the infrared-receiving transistors, and effectively increasing the light-resistance performance of the infrared touchscreen.

Description

说 明 书 红外触摸屏  Description book infrared touch screen
技术领域  Technical field
本发明涉及一种红外触摸屏。 背景技术  The invention relates to an infrared touch screen. Background technique
红外触摸屏因为工作稳定， 大量应用在各种恶劣环境中。  Infrared touch screens are used in a variety of harsh environments due to their stable operation.
通常， 红外触摸屏是安装在显示器的前面的一个电路板外框， 在电 路板外框的四条边上排布红外发射管和红外接收管， 一般情况下红外发 射管和红外接收管设置在边框的相对的两条边上， 从而形成交叉的红外 矩阵。 用户在触摸屏幕时， 手指就会挡住经过该位置的横竖红外线， 从 而判断出触摸点在屏幕的位置。  Generally, the infrared touch screen is a circuit board outer frame mounted on the front of the display, and the infrared transmitting tube and the infrared receiving tube are arranged on four sides of the outer frame of the circuit board. Generally, the infrared transmitting tube and the infrared receiving tube are disposed on the frame. Opposite the two sides, thus forming a crossed infrared matrix. When the user touches the screen, the finger blocks the horizontal and vertical infrared rays passing through the position, thereby judging the position of the touch point on the screen.
在使用红外触摸屏的过程中， 有时会遇到阳光直射红外触摸屏的红 外接收管的情况， 当在强光环境中， 强光直接照射红外接收管很容易造 成红外接收管的光饱和。 衡量红外触摸屏抗光性能的标准是 10 万 LUX (9mW/Cm2)时阳光的入射角度， 造成红外触摸屏的红外接收管光饱和的阳 光入射角度越小， 红外触摸屏的抗光性能越好。 In the process of using the infrared touch screen, sometimes the infrared receiving tube of the infrared direct touch screen is encountered in the sunlight. When the strong light directly illuminates the infrared receiving tube, the light of the infrared receiving tube is easily saturated. The standard for measuring the anti-light performance of infrared touch screen is the incident angle of sunlight when 100,000 LUX (9mW/ C m2) is used. The smaller the incident angle of sunlight saturated by the infrared receiving tube of the infrared touch screen, the better the anti-light performance of the infrared touch screen.
在现有技术中， 有的红外触摸屏， 为了抗强光， 采用红外接收管外 移的方法， 即在进行 PCB 布板时， 为了避免在强光环境下强光直接照射 红外接收管而造成红外接收管的光饱和， 因而在 PCB 布板时使得触摸屏 边框上设置的红外接收管尽量远离触摸检测区域而向边框外侧移动。  In the prior art, some infrared touch screens, in order to resist glare, use an infrared receiving tube to move outward, that is, when performing PCB layout, in order to avoid direct illumination of the infrared receiving tube under strong light conditions, infrared is caused. The light of the receiving tube is saturated, so that the infrared receiving tube disposed on the border of the touch screen is moved as far as possible from the touch detecting area to the outside of the frame when the PCB is laid.
为了进一步抗强光， 有的红外触摸屏还采用窄带滤光条的方法， 以 对强光进行过滤。  In order to further resist glare, some infrared touch screens also use narrow-band filter strips to filter bright light.
然而， 上述红外接收管外移和采用窄带滤光条的方法都具有局限性， 抗光效果不够理想。 因为一方面， 红外接收管外移会造成红外触摸屏的 边框的宽度变大， 红外接收管仅设置在边框的外侧， 造成边框内侧空间 的浪费。 另一方面， 现有的窄带滤光条长度都比较短， 整个触摸屏要使 用很多条拼接而成， 在拼接处， 对光路会有很大的损失， 并且在温度变 化时， 因为窄带滤光条膨胀系数与其它结构不一致， 也会造成窄带滤光 条与固定结构脱离等问题， 要根据触摸屏进行开模成本较高。 However, the above-mentioned method of shifting the infrared receiving tube and adopting the narrow-band filter strip has limitations, and the light-resisting effect is not ideal. Because on the one hand, the infrared receiving tube moves outward, which causes the width of the border of the infrared touch screen to become larger, and the infrared receiving tube is only disposed outside the frame, resulting in the space inside the frame. Waste. On the other hand, the existing narrow-band filter strips are relatively short in length, and the entire touch screen is formed by using a plurality of strips. At the joint, there is a great loss to the optical path, and when the temperature changes, because the narrow-band filter strips The expansion coefficient is inconsistent with other structures, which may also cause problems such as the separation of the narrow-band filter strip from the fixed structure, and the cost of opening the mold according to the touch screen is relatively high.
发明内容 Summary of the invention
针对现有技术中存在的上述问题， 本发明提供了一种红外触摸屏， 以用于提供较好的抗光性能。  In view of the above problems in the prior art, the present invention provides an infrared touch screen for providing better light resistance.
本发明提供了一种红外触摸屏， 该红外触摸屏包括边框以及设置于 所述边框的至少一条边上的多个红外发射管和多个红外接收管， 其中， 所述多个红外发射管靠近所述边框的内侧设置， 所述多个红外接收管靠 近所述边框的外侧设置。  The present invention provides an infrared touch screen including a bezel and a plurality of infrared transmitting tubes and a plurality of infrared receiving tubes disposed on at least one side of the bezel, wherein the plurality of infrared transmitting tubes are adjacent to the The inner side of the frame is disposed, and the plurality of infrared receiving tubes are disposed adjacent to an outer side of the frame.
优选地， 该红外触摸屏还包括反射部件， 所述反射部件设置在所述 边框的一条边上， 在与设置有所述反射部件的一条边相对的所述边框的 另一条边上设置有所述多个红外发射管和所述多个红外接收管。  Preferably, the infrared touch screen further includes a reflecting member disposed on one side of the frame, and the other side of the frame opposite to a side on which the reflecting member is disposed is disposed a plurality of infrared transmitting tubes and the plurality of infrared receiving tubes.
优选地， 在所述边框的相对的两条边上的每一条边上设置有所述多 个红外发射管和所述多个红外接收管。  Preferably, the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes are disposed on each of the opposite sides of the bezel.
优选地， 在所述边框的一条边上设置的红外发射管和相对的另一条 边上设置的红外接收管构成第一组红外元件， 在所述边框的所述一条边 上设置的红外接收管和相对的所述另一条边上的红外发射管构成第二组 红外元件， 在所述第一组红外元件发生故障或者所述第一组红外元件中 的红外发射管发出的红外光的光强与所述第一组元件中的红外接收管接 收的红外光的光强之间的差值大于预定值时， 所述第一组红外元件停用， 所述第二组红外元件启用。  Preferably, an infrared transmitting tube disposed on one side of the frame and an infrared receiving tube disposed on the opposite side of the frame constitute a first group of infrared elements, and an infrared receiving tube disposed on the one side of the frame And the opposite infrared transmitting tube on the other side constitutes a second group of infrared elements, wherein the first group of infrared elements fails or the intensity of infrared light emitted by the infrared emitting tubes in the first group of infrared elements The first set of infrared elements is deactivated when the difference between the intensity of the infrared light received by the infrared receiving tubes in the first set of elements is greater than a predetermined value, and the second set of infrared elements is enabled.
优选地， 在所述边框的四条边上的每一条边上设置有所述多个红外 发射管和所述多个红外接收管。  Preferably, the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes are disposed on each of the four sides of the bezel.
优选地， 所述边框的一对相对的边上的其中一组相对的红外发射管 和红外接收管构成第一组红外元件， 另一组相对的红外发射管和红外接 收管构成第二组红外元件， 所述边框的另一对相对的边上的其中一组相 对的红外发射管和红外接收管构成第三组红外元件， 另一组相对的红外 发射管和红外接收管构成第四组红外元件， 在所述第一组红外元件和 /或 所述第三组红外元件发生故障， 或者所述第一组红外元件和 /或所述第三 组红外元件的红外接收管发生光饱和状况时， 所述第一组红外元件和 /或 所述第三组红外元件停用， 所述第二组红外元件和 /或所述第四组红外元 件启用。 Preferably, one of the opposite infrared transmitting tubes and the infrared receiving tube on a pair of opposite sides of the frame constitutes a first group of infrared elements, and the other pair of opposite infrared emitting tubes and infrared receiving tubes constitute a second group of infrared An element, a pair of opposite infrared transmitting tubes and an infrared receiving tube on the opposite pair of sides of the frame constitute a third group of infrared elements, and another set of opposite infrared The transmitting tube and the infrared receiving tube constitute a fourth group of infrared elements, the first group of infrared elements and/or the third group of infrared elements failing, or the first group of infrared elements and/or the third group When the infrared receiving tube of the infrared element is in a light saturation state, the first group of infrared elements and/or the third group of infrared elements are deactivated, and the second group of infrared elements and/or the fourth group of infrared elements are enabled .
优选地， 所述多个红外发射管等间距排列成一行， 所述多个红外接 收管等间距排列成一行， 所述多个红外发射管和所述多个红外接收管交 叉设置。  Preferably, the plurality of infrared transmitting tubes are equally arranged in a row, the plurality of infrared receiving tubes are equally arranged in a row, and the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes are disposed at a cross.
优选地， 所述多个红外发射管和所述多个红外接收管以距离所述边 框所围成的触摸检测区域不同的高度设置。  Preferably, the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes are disposed at different heights from a touch detection area surrounded by the side frames.
优选地， 所述红外触摸屏还包括滤光条， 所述滤光条安装在所述边 框的设置有所述多个红外发射管与所述多个红外接收管的至少一条边的 优选地， 该红外触摸屏还包括主控单元、 发射控制电路、 采样电路、 模数转换电路和接收控制电路， 所述发射控制电路与所述多个红外发射 管电连接， 所述接收控制电路与所述多个红外接收管电连接， 所述多个 红外接收管、 所述采样电路和所述模数转换电路顺次电连接， 所述主控 单元与所述发射控制电路、 所述接收控制电路和所述模数转换电路电连 接。  Preferably, the infrared touch screen further includes a filter strip, wherein the filter strip is mounted on the frame, preferably at least one side of the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes. The infrared touch screen further includes a main control unit, a transmission control circuit, a sampling circuit, an analog-to-digital conversion circuit, and a receiving control circuit, wherein the emission control circuit is electrically connected to the plurality of infrared transmitting tubes, and the receiving control circuit and the plurality of The infrared receiving tube is electrically connected, the plurality of infrared receiving tubes, the sampling circuit and the analog to digital conversion circuit are sequentially electrically connected, the main control unit and the transmitting control circuit, the receiving control circuit, and the The analog to digital conversion circuit is electrically connected.
优选地， 该红外触摸屏还包括滤波电路和放大电路， 所述滤波电路 和所述放大电路电连接在所述采样电路与所述模数转换电路之间。  Preferably, the infrared touch screen further includes a filter circuit and an amplification circuit, and the filter circuit and the amplification circuit are electrically connected between the sampling circuit and the analog to digital conversion circuit.
利用本发明提供的红外触摸屏， 将红外发射管靠近触摸屏的边框的 外侧设置， 并采用红外发光管与红外接收管交错间隔排列的方式， 大大 降低了在强光的情况下入射光直射红外接收管的可能性， 从而避免造成 红外接收管的光饱和， 有效地提高了红外触摸屏的抗光性能。  By using the infrared touch screen provided by the invention, the infrared emission tube is arranged close to the outer side of the frame of the touch screen, and the infrared light-emitting tube and the infrared receiving tube are arranged at a staggered interval, thereby greatly reducing the direct light infrared receiving tube of the incident light in the case of strong light. The possibility of avoiding the light saturation of the infrared receiving tube, effectively improving the light resistance of the infrared touch screen.
附图说明 DRAWINGS
图 1为根据本发明的红外触摸屏的结构示意图；  1 is a schematic structural view of an infrared touch screen according to the present invention;
图 2为根据本发明的红外触摸屏的电路结构框图。 具体实施方式 2 is a block diagram showing the circuit structure of an infrared touch screen according to the present invention. detailed description
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案 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的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。  The technical solutions in the embodiments of 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, and not all of the 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.
图 1为根据本发明的红外触摸屏的结构示意图。  1 is a schematic structural view of an infrared touch screen according to the present invention.
参考图 1 ， 本发明提供了一种红外触摸屏， 该红外触摸屏包括边框 以及设置于所述边框的至少一条边上的多个红外发射管 2 和多个红外接 收管 3， 其中， 所述多个红外发射管 2靠近所述边框的内侧设置， 所述多 个红外接收管 3靠近所述边框的外侧设置。  Referring to FIG. 1 , the present invention provides an infrared touch screen including a frame and a plurality of infrared transmitting tubes 2 and a plurality of infrared receiving tubes 3 disposed on at least one side of the frame, wherein the plurality of The infrared emitting tube 2 is disposed near the inner side of the frame, and the plurality of infrared receiving tubes 3 are disposed adjacent to the outer side of the frame.
如图 1 所示， 在红外触摸屏的边框的至少一个边上既设置有红外发 射管 2， 也设置有红外接收管 3，边框以内所围成的区域为触摸检测区域。 为了避免强光直射红外接收管 3， 根据本发明， 将多个红外发射管 2靠近 边框的内侧设置， 将多个红外接收管 3 靠近边框的外侧设置， 这样， 通 过使得红外发射管 2 远离触摸检测区域， 可以利用边框的内侧遮挡部分 可能直射红外接收管 3 的强光， 减少红外发射管 2 的暴露区域， 大大降 低强光直射红外接收管 3的可能性， 从而提高了红外触摸屏的抗光性能， 同时， 在靠近边框的内侧设置红外发射管 2， 利用了边框的内侧空间， 不 会对边框空间造成浪费。  As shown in Fig. 1, at least one side of the frame of the infrared touch screen is provided with an infrared emitting tube 2, and an infrared receiving tube 3 is also provided, and an area enclosed by the border is a touch detecting area. In order to avoid direct light from the infrared receiving tube 3, according to the present invention, a plurality of infrared transmitting tubes 2 are disposed near the inner side of the frame, and a plurality of infrared receiving tubes 3 are disposed near the outer side of the frame, so that the infrared transmitting tube 2 is moved away from the touch. In the detection area, the inner shielding portion of the frame may directly illuminate the illuminating light of the infrared receiving tube 3, reduce the exposed area of the infrared transmitting tube 2, and greatly reduce the possibility of the direct light receiving the infrared receiving tube 3, thereby improving the anti-light of the infrared touch screen. Performance, at the same time, the infrared emission tube 2 is arranged near the inner side of the frame, and the inner space of the frame is utilized, which does not waste the space of the frame.
可以理解， 可以仅在红外触摸屏的边框的一条边上设置多个红外发 射管 2和多个红外接收管 3，也可以在红外触摸屏的边框的两条边上设置 多个红外发射管 2和多个红外接收管 3，还可以在红外触摸屏的边框的四 条边上都设置多个红外发射管 2和多个红外接收管 3。  It can be understood that a plurality of infrared transmitting tubes 2 and a plurality of infrared receiving tubes 3 may be disposed only on one side of the frame of the infrared touch screen, or multiple infrared transmitting tubes 2 and more may be disposed on two sides of the frame of the infrared touch screen. The infrared receiving tube 3 can also be provided with a plurality of infrared transmitting tubes 2 and a plurality of infrared receiving tubes 3 on the four sides of the frame of the infrared touch screen.
下面详细描述这几种具体的实施方式。  These specific embodiments are described in detail below.
根据一种实施方式， 该红外触摸屏还可以包括反射部件， 所述反射 部件设置在所述边框的一条边上， 在与设置有所述反射部件的边相对的 所述边框的另一条边上设置有所述多个红外发射管 2 和所述多个红外接 收管 3。 According to an embodiment, the infrared touch screen may further include a reflective component, the reflection a component is disposed on one side of the frame, and the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 are disposed on the other side of the frame opposite to the side on which the reflecting member is disposed .
在这种实施方式中， 设置在所述另一条边上的红外发射管 2 发出的 红外光束被相对的一条边上的反射部件反射后可以被与红外发射管 2 设 置在同一条边上的一个或多个红外接收管 3 接收， 从而在触摸检测区域 内形成一条或多条红外反射光路， 通过依次选通红外发射管 2 和红外接 收管 3， 并判断是否有红外反射光路被阻断， 来确定触摸检测区域内是否 有触摸物。 可以理解， 本发明对红外发射管 2和红外接收管 3 的具体选 通方式不做限定， 只要能通过计算确定触摸检测区域内的触摸物的位置 即可。  In this embodiment, the infrared light beam emitted from the infrared transmitting tube 2 disposed on the other side is reflected by the reflecting member on the opposite side and can be disposed on the same side as the infrared transmitting tube 2 Or the plurality of infrared receiving tubes 3 are received, thereby forming one or more infrared reflected light paths in the touch detection area, and sequentially selecting the infrared transmitting tube 2 and the infrared receiving tube 3, and determining whether the infrared reflecting light path is blocked, Determine if there is a touch in the touch detection area. It can be understood that the specific strobing manner of the infrared transmitting tube 2 and the infrared receiving tube 3 is not limited as long as the position of the touch object in the touch detecting area can be determined by calculation.
根据另一种实施方式， 可以在所述边框的相对的两条边上的每一条 边上设置有所述多个红外发射管 2和所述多个红外接收管 3。  According to another embodiment, the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 may be disposed on each of the opposite sides of the bezel.
在这种实施方式中， 在所述边框的一条边上设置的红外发射管 2 和 相对的另一条边上设置的红外接收管 3 构成第一组红外元件， 在所述边 框的所述一条边上设置的红外接收管 3 和相对的所述另一条边上的红外 发射管 2构成第二组红外元件。 第一组红外元件中的红外发射管 2发出 的红外光束被该第一组红外元件的红外接收管 3 接收， 从而在触摸检测 区域内形成一条或多个条红外光路， 通过依次选通第一组红外元件中的 红外发射管 2和红外接收管 3， 并判断是否有红外光路被阻断， 来确定触 摸检测区域内是否有触摸物。 优选地， 在第一组红外元件发生故障， 或 者第一组红外元件的红外接收管 3 发生光饱和等状况时 （例如， 当判断 红外发射管 2发出的红外光的光强与红外接收管 3接收的红外光的光强 之间的差值大于预定值时， 判断红外接收管 3 发生光饱和） ， 可以停用 第一组红外元件， 并启用第二组红外元件来发射和接收红外光束， 从而 确定触摸检测区域中是否有触摸物。 可以理解， 本发明对红外发射管 2 和红外接收管 3 的具体选通方式不做限定， 只要能通过计算确定触摸检 测区域内的触摸物的位置即可。 根据再一种实施方式， 可以在所述边框的四条边上的每一条边上设 置有所述多个红外发射管 2和所述多个红外接收管 3。 在这种实施方式中， 可以构成四组红外元件， 即所述边框的一对相 对的边上的其中一组相对的红外发射管 2和红外接收管 3可以构成第一 组红外元件， 另一组相对的红外发射管 2和红外接收管 3可以构成第二 组红外元件， 类似地， 边框的另一对相对的边上的其中一组相对的红外 发射管 2和红外接收管 3可以构成第三组红外元件， 另一组相对的红外 发射管 2和红外接收管 3可以构成第四组红外元件。 第一组红外元件中 的红外发射管 2发出的红外光束被该第一组红外元件的红外接收管 3接 收， 第三组红外元件中的红外发射管 2 发出的红外光束被该第三组红外 元件的红外接收管 3 接收， 从而在触摸检测区域内形成网格状的红外光 束阵列，通过依次选通第一组红外元件中的红外发射管 2和红外接收管 3 以及第三组红外元件中的红外发射管 2和红外接收管 3，并判断是否有红 外光路被阻断， 来确定触摸检测区域内是否有触摸物。 优选地， 在第一 组红外元件和 /或第三组红外元件发生故障， 或者第一组红外元件和 /或 第三组红外元件的红外接收管 3 发生光饱和等状况时， 可以停用第一组 红外元件和 /或第三组红外元件， 并启用第二组红外元件和 /或第四组红 外元件来发射和接收红外光束， 从而确定触摸检测区域中是否有触摸物。 可以理解， 本发明对红外发射管 2和红外接收管 3 的具体选通方式不做 限定， 只要能通过计算确定触摸检测区域内的触摸物的位置即可。 In this embodiment, the infrared transmitting tube 2 disposed on one side of the bezel and the infrared receiving tube 3 disposed on the opposite side of the frame constitute a first group of infrared elements, on the one side of the bezel The infrared receiving tube 3 provided above and the infrared emitting tube 2 on the opposite side of the other side constitute a second group of infrared elements. The infrared light beam emitted by the infrared transmitting tube 2 in the first group of infrared elements is received by the infrared receiving tube 3 of the first group of infrared elements, thereby forming one or more infrared light paths in the touch detection area, and sequentially strobing the first The infrared transmitting tube 2 and the infrared receiving tube 3 in the infrared element are grouped, and it is judged whether or not the infrared light path is blocked to determine whether there is a touch object in the touch detection area. Preferably, when the first group of infrared elements fails, or the infrared receiving tube 3 of the first group of infrared elements is in a state of light saturation or the like (for example, when determining the intensity of the infrared light emitted by the infrared transmitting tube 2 and the infrared receiving tube 3 When the difference between the received light intensity of the infrared light is greater than a predetermined value, determining that the infrared receiving tube 3 is saturated with light, the first group of infrared elements may be deactivated, and the second group of infrared elements may be enabled to emit and receive the infrared beam. Thereby determining whether there is a touch object in the touch detection area. It can be understood that the specific strobing manner of the infrared transmitting tube 2 and the infrared receiving tube 3 is not limited as long as the position of the touch object in the touch detection area can be determined by calculation. According to still another embodiment, the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 may be disposed on each of the four sides of the bezel. In this embodiment, four sets of infrared elements may be formed, that is, one of the opposite sides of the pair of opposite sides of the frame may be the first group of infrared elements, and the infrared receiving tube 3 may constitute a first group of infrared elements. The opposite infrared transmitting tubes 2 and the infrared receiving tubes 3 may constitute a second group of infrared elements. Similarly, one of the opposite pairs of infrared transmitting tubes 2 and infrared receiving tubes 3 on the opposite pair of sides of the frame may constitute the first Three sets of infrared elements, another set of opposing infrared emitting tubes 2 and infrared receiving tubes 3 may constitute a fourth set of infrared elements. The infrared light beam emitted by the infrared emitting tube 2 in the first group of infrared elements is received by the infrared receiving tube 3 of the first group of infrared elements, and the infrared light beam emitted by the infrared emitting tube 2 in the third group of infrared elements is subjected to the third group of infrared rays. The infrared receiving tube 3 of the component receives, thereby forming a grid-shaped infrared beam array in the touch detection area, and sequentially stroking the infrared transmitting tube 2 and the infrared receiving tube 3 in the first group of infrared elements and the third group of infrared elements The infrared transmitting tube 2 and the infrared receiving tube 3 determine whether or not the infrared light path is blocked to determine whether there is a touch object in the touch detection area. Preferably, when the first group of infrared elements and/or the third group of infrared elements fails, or the first group of infrared elements and/or the infrared receiving tubes 3 of the third group of infrared elements are in a state of light saturation, the first A set of infrared elements and/or a third set of infrared elements and a second set of infrared elements and/or a fourth set of infrared elements are enabled to emit and receive infrared beams to determine if there is a touch in the touch detection area. It can be understood that the specific gating manner of the infrared transmitting tube 2 and the infrared receiving tube 3 is not limited as long as the position of the touch object in the touch detection area can be determined by calculation.
优选地， 所述多个红外发射管 2 等间距排列成一行， 所述多个红外 接收管 3等间距排列成一行， 所述多个红外发射管 2和所述多个红外接 收管 3交叉设置， 从而使得红外接收管 3和红外发射管 2之间的光路不 受遮挡。  Preferably, the plurality of infrared transmitting tubes 2 are equally arranged in a row, the plurality of infrared receiving tubes 3 are equally arranged in a row, and the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 are arranged in a cross Therefore, the optical path between the infrared receiving tube 3 and the infrared transmitting tube 2 is unobstructed.
根据一种实施方式， 所述多个红外发射管和所述多个红外接收管可 以距离所述边框所围成的触摸检测区域不同的高度设置， 这样红外接收 管和红外发射管不在一个平面上， 使得红外发射管不会影响红外接收管 对红外光束的接收。 其中， 所述多个红外发射管 2 可以为发光二极管， 所述多个红外接 收管 3可以为接收三极管。 According to an embodiment, the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes may be disposed at different heights from the touch detection area enclosed by the frame, such that the infrared receiving tube and the infrared transmitting tube are not in one plane. , so that the infrared emission tube does not affect the infrared receiving tube to receive the infrared beam. The plurality of infrared transmitting tubes 2 may be light emitting diodes, and the plurality of infrared receiving tubes 3 may be receiving transistors.
为了进一步提高红外触摸屏的抗光性能， 所述红外触摸屏还可以包 括滤光条， 所述滤光条安装在所述边框的设置有所述多个红外发射管 2 与所述多个红外接收管 3 的至少一条边的内侧， 从而可以进一步对强光 进行过滤， 避免红外接收管 3发生光饱和。  In order to further improve the light resistance of the infrared touch screen, the infrared touch screen may further include a filter strip, and the filter strip is mounted on the frame and disposed with the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes The inner side of at least one side of the 3, so that the strong light can be further filtered to avoid light saturation of the infrared receiving tube 3.
图 2为根据本发明的红外触摸屏的电路结构框图。  2 is a block diagram showing the circuit structure of an infrared touch screen according to the present invention.
参考图 2，根据一种实施方式，该红外触摸屏还可以包括主控单元 9、 发射控制电路 1、 采样电路 4、 模数转换电路 7和接收控制电路 8， 所述 发射控制电路 1 与所述多个红外发射管 2 电连接， 所述接收控制电路 8 与所述多个红外接收管 3电连接， 所述多个红外接收管 3、 所述采样电路 4和所述模数转换电路 7顺次电连接，所述主控单元 9与所述发射控制电 路 1、 所述接收控制电路 8和所述模数转换电路 7电连接。 其中， 所述发 射控制电路 1用于选通红外发射管 2， 以驱动红外发射管 2依次发光， 所 述接收控制电路 8用于选通红外接收管 3， 以启动一个或多个红外接收管 3来接收红外光， 所述红外接收管 3将接收到的红外光转换成电流信号， 所述电流信号通过采样电路 4转换成电压信号， 该采样电路 4可以但不 限于采样电阻， 所述模数转换电路 7 将所述电压信号转换成数字信号， 并将该数字信号输入到主控单元 9，所述主控单元 9接收所述数字信号并 对数字信号进行处理， 例如对数字信号进行计算来确定触摸点的位置， 或者例如去除数字信号中的环境噪声并将去除噪声后的数字信号发送给 CPU或其他处理单元来进行计算以确定触摸点的位置， 以及主控单元 9还 根据处理结果来控制所述发射控制电路 1和所述接收控制电路 8，进而再 通过发射控制电路 1和接收控制电路 8来驱动红外发射管 2与红外接收 进一步优选地， 该红外触摸屏还可以包括滤波电路 5和放大电路 6， 所述滤波电路 5和所述放大电路 6 电连接在所述采样电路 4与所述模数 转换电路 7之间。 所述滤波电路 5用于对从所述采样电路 4接收的电压 信号进行滤波， 并将滤波后的信号输出到放大电路 6， 所述放大电路 6用 于对从所述滤波电路 5 接收到的信号进行放大， 并将放大后的信号输出 到模数转换电路 7。 Referring to FIG. 2, according to an embodiment, the infrared touch screen may further include a main control unit 9, a transmission control circuit 1, a sampling circuit 4, an analog-to-digital conversion circuit 7, and a reception control circuit 8, the emission control circuit 1 and the a plurality of infrared transmitting tubes 2 are electrically connected, the receiving control circuit 8 is electrically connected to the plurality of infrared receiving tubes 3, and the plurality of infrared receiving tubes 3, the sampling circuit 4 and the analog to digital conversion circuit 7 are The sub-control unit 9 is electrically connected to the transmission control circuit 1, the reception control circuit 8, and the analog-to-digital conversion circuit 7. The emission control circuit 1 is configured to gate the infrared emission tube 2 to drive the infrared emission tube 2 to sequentially emit light, and the reception control circuit 8 is configured to gate the infrared receiving tube 3 to activate one or more infrared receiving tubes. 3, to receive infrared light, the infrared receiving tube 3 converts the received infrared light into a current signal, and the current signal is converted into a voltage signal by the sampling circuit 4, and the sampling circuit 4 can be, but is not limited to, a sampling resistor, the module The number conversion circuit 7 converts the voltage signal into a digital signal, and inputs the digital signal to the main control unit 9, the main control unit 9 receives the digital signal and processes the digital signal, for example, calculating the digital signal. Determining the position of the touch point, or for example removing ambient noise in the digital signal and transmitting the noise-removed digital signal to the CPU or other processing unit for calculation to determine the location of the touch point, and the main control unit 9 also according to the processing result Controlling the transmission control circuit 1 and the reception control circuit 8, and then driving through the transmission control circuit 1 and the reception control circuit 8 Infrared transmitting tube 2 and infrared receiving further preferably, the infrared touch screen may further comprise a filtering circuit 5 and an amplifying circuit 6, the filter circuit 5 and the amplifying circuit 6 being electrically connected to the sampling circuit 4 and the analog to digital conversion Between circuits 7. The filter circuit 5 is for using a voltage received from the sampling circuit 4 The signal is filtered, and the filtered signal is output to an amplifying circuit 6, which amplifies the signal received from the filter circuit 5, and outputs the amplified signal to the analog-to-digital conversion circuit 7. .
下面， 参考图 1和图 2， 详细描述本发明的工作流程。  Next, the workflow of the present invention will be described in detail with reference to Figs. 1 and 2.
根据图 1 中所示的一种优选的实施方式， 可以在红外触摸屏的边框 的四条边上的每一者上都设置有所述多个红外发射管 2 和所述多个红外 接收管 3， 该多个红外发射管 2和多个红外接收管 3前后交叉设置。 设置 在四条边上的多个红外发射管 2和多个红外接收管 3可以构成四组红外 元件， 即边框的一对相对的边上的其中一组相对的红外发射管 2 和红外 接收管 3可以构成第一组红外元件， 另一组相对的红外发射管 2和红外 接收管 3 可以构成第二组红外元件， 类似地， 边框的另一对相对的边上 的其中一组相对的红外发射管 2和红外接收管 3可以构成第三组红外元 件， 另一组相对的红外发射管 2和红外接收管 3可以构成第四组红外元 件。 主控单元 9控制所述发射控制电路 1和所述接收控制电路 8， 进而再 通过发射控制电路 1和接收控制电路 8来驱动红外发射管 2与红外接收 管 3。 优选地， 可以启动第一组红外元件和第三组红外元件工作， 第一组 红外元件中的红外发射管 2 发出的红外光束被该第一组红外元件中的红 外接收管 3接收， 第三组红外元件中的红外发射管 2发出的红外光束被 该第三组红外元件中的红外接收管 3 接收， 从而在触摸检测区域内形成 网格状的红外光束阵列， 主控单元 9通过控制所述发射控制电路 1 和所 述接收控制电路 8来依次选通第一组红外元件中的红外发射管 2和红外 接收管 3以及第三组红外元件中的红外发射管 2和红外接收管 3，并根据 接收到的代表红外接收管 3 所接收到的红外光的状态的数字信号， 直接 计算或将数字信号发送给 CPU 或其他处理单元进行计算来判断是否有红 外光路被阻断， 从而确定触摸检测区域内是否有触摸物以及确定触摸点 的位置。 主控单元 9可以根据计算结果来控制切换红外发射管 2和红外 接收管 3 的选通方式， 例如可以从一次选通多个红外接收管 3切换成一 次选通一个红外接收管 3等。 当主控单元 9根据接收到的代表红外接收 管 3所接收到的红外光的状态的数字信号判断在第一组红外元件和 /或第 三组红外元件发生故障， 或者第一组红外元件和 /或第三组红外元件的红 外接收管 3发生光饱和等状况时， 可以控制所述发射控制电路 1和 /或所 述接收控制电路 8停用第一组红外元件和 /或第三组红外元件， 启用第二 组红外元件和 /或第四组红外元件来发射和接收红外光束， 从而确定触摸 检测区域中是否有触摸物。 可以理解， 本发明对红外发射管 2 和红外接 收管 3 的具体选通方式不做限定， 只要能通过计算确定触摸检测区域内 的触摸物的位置即可。 According to a preferred embodiment shown in FIG. 1, the plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 may be disposed on each of the four sides of the frame of the infrared touch screen. The plurality of infrared transmitting tubes 2 and the plurality of infrared receiving tubes 3 are arranged in a front-back direction. A plurality of infrared transmitting tubes 2 and a plurality of infrared receiving tubes 3 disposed on four sides may constitute four sets of infrared elements, that is, a pair of opposite infrared transmitting tubes 2 and infrared receiving tubes 3 on a pair of opposite sides of the bezel A first set of infrared elements can be formed, and another set of opposing infrared emitter tubes 2 and infrared receiver tubes 3 can form a second group of infrared elements, similarly, one of the opposite pairs of opposite sides of the bezel is opposite to infrared emission. The tube 2 and the infrared receiving tube 3 may constitute a third group of infrared elements, and the other group of opposite infrared transmitting tubes 2 and infrared receiving tubes 3 may constitute a fourth group of infrared elements. The main control unit 9 controls the transmission control circuit 1 and the reception control circuit 8, and further drives the infrared emission tube 2 and the infrared receiving tube 3 through the emission control circuit 1 and the reception control circuit 8. Preferably, the first group of infrared elements and the third group of infrared elements can be activated to operate, and the infrared light beam emitted by the infrared emitting tube 2 of the first group of infrared elements is received by the infrared receiving tube 3 of the first group of infrared elements, third The infrared light beam emitted by the infrared emitting tube 2 in the infrared component is received by the infrared receiving tube 3 in the third group of infrared elements, thereby forming a grid-shaped infrared beam array in the touch detection area, and the main control unit 9 passes through the control station. The emission control circuit 1 and the reception control circuit 8 sequentially gate the infrared emission tube 2 and the infrared receiving tube 3 of the first group of infrared elements and the infrared emission tube 2 and the infrared receiving tube 3 of the third group of infrared elements. And according to the received digital signal representing the state of the infrared light received by the infrared receiving tube 3, directly calculating or transmitting the digital signal to the CPU or other processing unit for calculation to determine whether an infrared light path is blocked, thereby determining the touch Check if there is a touch object in the area and determine the location of the touch point. The main control unit 9 can control the switching manner of switching the infrared transmitting tube 2 and the infrared receiving tube 3 according to the calculation result, for example, switching from the plurality of infrared receiving tubes 3 at one time to switching one infrared receiving tube 3 at a time. When the main control unit 9 receives the representative infrared according to the received The digital signal of the state of the infrared light received by the tube 3 determines that the first group of infrared elements and/or the third group of infrared elements have failed, or the first group of infrared elements and/or the infrared group of the third group of infrared elements 3 When a condition such as light saturation occurs, the emission control circuit 1 and/or the reception control circuit 8 may be controlled to disable the first group of infrared elements and/or the third group of infrared elements, enabling the second group of infrared elements and/or Four sets of infrared elements are used to transmit and receive infrared beams to determine if there is a touch in the touch detection area. It can be understood that the specific strobing manner of the infrared transmitting tube 2 and the infrared receiving tube 3 is not limited as long as the position of the touch object in the touch detection area can be determined by calculation.
利用本发明提供的红外触摸屏， 将红外发射管 2 靠近所述边框的外 侧设置， 并采用红外发光管与红外接收管 3 交错间隔排列的方式， 大大 降低了在强光的情况下入射光直射红外接收管 3 的可能性， 从而避免造 成红外接收管 3的光饱和， 有效地提高了红外触摸屏的抗光性能。  By using the infrared touch screen provided by the invention, the infrared emitting tube 2 is arranged close to the outer side of the frame, and the infrared light emitting tube and the infrared receiving tube 3 are arranged at a staggered interval, thereby greatly reducing the direct incident infrared light in the case of strong light. The possibility of receiving the tube 3, thereby avoiding the light saturation of the infrared receiving tube 3, effectively improving the light resistance of the infrared touch screen.
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局 限于此， 任何熟悉本领域技术的技术人员在本发明公开的技术范围内， 可 轻易想到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发 明的保护范围应以所述权利要求的保护范围为准。  The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present disclosure. All should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

权 利 要 求 书 claims
1、 一种红外触摸屏， 该红外触摸屏包括边框以及设置于所述边框的 至少一条边上的多个红外发射管 （2) 和多个红外接收管 （3) ， 其中， 所述多个红外发射管 （2) 靠近所述边框的内侧设置， 所述多个红外 接收管 （3) 靠近所述边框的外侧设置。 1. An infrared touch screen, the infrared touch screen includes a frame and a plurality of infrared transmitting tubes (2) and a plurality of infrared receiving tubes (3) arranged on at least one side of the frame, wherein the plurality of infrared transmitting tubes (3) The tube (2) is arranged close to the inside of the frame, and the plurality of infrared receiving tubes (3) are arranged close to the outside of the frame.
2、 根据权利要求 1所述的红外触摸屏， 其中， 该红外触摸屏还包括 反射部件， 所述反射部件设置在所述边框的一条边上， 在与设置有所述 反射部件的一条边相对的所述边框的另一条边上设置有所述多个红外发 射管 （2) 和所述多个红外接收管 （3) 。 2. The infrared touch screen according to claim 1, wherein the infrared touch screen further includes a reflective component, the reflective component is disposed on one side of the frame, on all sides opposite to the side where the reflective component is disposed. The other side of the frame is provided with the plurality of infrared transmitting tubes (2) and the plurality of infrared receiving tubes (3).
3、 根据权利要求 1所述的红外触摸屏， 其中， 在所述边框的相对的 两条边上的每一条边上设置有所述多个红外发射管 （2) 和所述多个红外 接收管 （3) 。 3. The infrared touch screen according to claim 1, wherein the plurality of infrared transmitting tubes (2) and the plurality of infrared receiving tubes are provided on each of two opposite sides of the frame. (3).
4、 根据权利要求 3所述的红外触摸屏， 其中， 在所述边框的一条边 上设置的红外发射管 （2) 和相对的另一条边上设置的红外接收管 （3) 构成第一组红外元件，在所述边框的所述一条边上设置的红外接收管（3) 和相对的所述另一条边上的红外发射管 （2) 构成第二组红外元件， 在所 述第一组红外元件发生故障或者所述第一组红外元件中的红外发射管 （2) 发出的红外光的光强与所述第一组元件中的红外接收管 （3) 接收的红外 光的光强之间的差值大于预定值时， 所述第一组红外元件停用， 所述第 二组红外元件启用。 4. The infrared touch screen according to claim 3, wherein the infrared transmitting tube (2) provided on one side of the frame and the infrared receiving tube (3) provided on the opposite side constitute the first group of infrared element, the infrared receiving tube (3) provided on one side of the frame and the infrared transmitting tube (2) on the other opposite side constitute a second group of infrared elements, and in the first group of infrared The component fails or the intensity of the infrared light emitted by the infrared transmitting tube (2) in the first group of infrared components and the intensity of the infrared light received by the infrared receiving tube (3) in the first group of components are When the difference is greater than the predetermined value, the first group of infrared components is deactivated and the second group of infrared components is activated.
5、 根据权利要求 1所述的红外触摸屏， 其中， 在所述边框的四条边 上的每一条边上设置有所述多个红外发射管 （2) 和所述多个红外接收管5. The infrared touch screen according to claim 1, wherein the plurality of infrared transmitting tubes (2) and the plurality of infrared receiving tubes are provided on each of the four sides of the frame.
(3) 。 (3).
6、 根据权利要求 5所述的红外触摸屏， 其中， 所述边框的一对相对 的边上的其中一组相对的红外发射管 （2) 和红外接收管 （3) 构成第一 组红外元件， 另一组相对的红外发射管 （2) 和红外接收管 （3) 构成第 二组红外元件， 所述边框的另一对相对的边上的其中一组相对的红外发 射管 （2) 和红外接收管 （3) 构成第三组红外元件， 另一组相对的红外 发射管 （2) 和红外接收管 （3) 构成第四组红外元件， 在所述第一组红 外元件和 /或所述第三组红外元件发生故障， 或者所述第一组红外元件和 /或所述第三组红外元件的红外接收管 （3) 发生光饱和状况时， 所述第 一组红外元件和 /或所述第三组红外元件停用， 所述第二组红外元件和 / 或所述第四组红外元件启用。 6. The infrared touch screen according to claim 5, wherein a set of opposite infrared transmitting tubes (2) and infrared receiving tubes (3) on a pair of opposite sides of the frame constitute the first One set of infrared elements, another set of opposite infrared emitting tubes (2) and infrared receiving tubes (3) constitute a second set of infrared elements, and one set of opposite infrared emitting tubes (3) on the other pair of opposite sides of the frame 2) and the infrared receiving tube (3) form a third group of infrared elements, and another group of opposite infrared transmitting tubes (2) and infrared receiving tubes (3) form a fourth group of infrared elements. In the first group of infrared elements and /or the third group of infrared elements fails, or the infrared receiving tube (3) of the first group of infrared elements and/or the third group of infrared elements suffers from light saturation, the first group of infrared elements and/or the third group of infrared elements is deactivated, and the second group of infrared elements and/or the fourth group of infrared elements are enabled.
7、 根据权利要求 1所述的红外触摸屏， 其中， 所述多个红外发射管 (2)等间距排列成一行， 所述多个红外接收管 （3)等间距排列成一行， 所述多个红外发射管 （2) 和所述多个红外接收管 （3) 交叉设置。 7. The infrared touch screen according to claim 1, wherein the plurality of infrared transmitting tubes (2) are arranged in a line with equal intervals, the plurality of infrared receiving tubes (3) are arranged in a line with equal intervals, and the plurality of infrared receiving tubes (3) are arranged in a line with equal intervals. The infrared transmitting tube (2) and the plurality of infrared receiving tubes (3) are arranged crosswise.
8、 根据权利要求 7所述的红外触摸屏， 其中， 所述多个红外发射管 (2) 和所述多个红外接收管 （3) 以距离所述边框所围成的触摸检测区 域不同的高度设置。 8. The infrared touch screen according to claim 7, wherein the plurality of infrared transmitting tubes (2) and the plurality of infrared receiving tubes (3) are at different heights from the touch detection area surrounded by the frame. set up.
9、 根据权利要求 1所述的红外触摸屏， 其中， 所述红外触摸屏还包 括滤光条，所述滤光条安装在所述边框的设置有所述多个红外发射管（2) 与所述多个红外接收管 （3) 的至少一条边的内侧。 9. The infrared touch screen according to claim 1, wherein the infrared touch screen further includes a filter strip installed on the frame and provided with the plurality of infrared emission tubes (2) and the The inside of at least one side of the plurality of infrared receiving tubes (3).
10、根据权利要求 1-9中任一项权利要求所述的红外触摸屏，其中， 该红外触摸屏还包括主控单元（9)、发射控制电路（1)、采样电路（4)、 模数转换电路 （7) 和接收控制电路 （8) ， 所述发射控制电路 （1) 与所 述多个红外发射管 （2) 电连接， 所述接收控制电路 （8) 与所述多个红 外接收管 （3) 电连接， 所述多个红外接收管 （3) 、 所述采样电路 （4) 和所述模数转换电路 （7) 顺次电连接， 所述主控单元 （9) 与所述发射 控制电路 （1) 、 所述接收控制电路 （8) 和所述模数转换电路 （7) 电连 接。 10. The infrared touch screen according to any one of claims 1 to 9, wherein the infrared touch screen further includes a main control unit (9), a transmission control circuit (1), a sampling circuit (4), and an analog-to-digital conversion circuit (7) and reception control circuit (8), the emission control circuit (1) is electrically connected to the plurality of infrared emission tubes (2), the reception control circuit (8) is to the plurality of infrared receiving tubes (3) Electrical connection, the plurality of infrared receiving tubes (3), the sampling circuit (4) and the analog-to-digital conversion circuit (7) are electrically connected in sequence, and the main control unit (9) and the The emission control circuit (1), the reception control circuit (8) and the analog-to-digital conversion circuit (7) are electrically connected.
11、 根据权利要求 10所述的红外触摸屏， 其中， 该红外触摸屏还包 括滤波电路 （5) 和放大电路 （6) ， 所述滤波电路 （5) 和所述放大电路 (6) 电连接在所述采样电路 （4) 与所述模数转换电路 （7) 之间。 11. The infrared touch screen according to claim 10, wherein the infrared touch screen further includes It includes a filter circuit (5) and an amplifier circuit (6). The filter circuit (5) and the amplifier circuit (6) are electrically connected between the sampling circuit (4) and the analog-to-digital conversion circuit (7). .
PCT/CN2013/075373 2012-06-29 2013-05-09 Infrared touchscreen WO2014000511A1 (en)

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