WO2016008227A1 - 红外触摸屏和显示装置 - Google Patents

红外触摸屏和显示装置 Download PDF

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Publication number
WO2016008227A1
WO2016008227A1 PCT/CN2014/089048 CN2014089048W WO2016008227A1 WO 2016008227 A1 WO2016008227 A1 WO 2016008227A1 CN 2014089048 W CN2014089048 W CN 2014089048W WO 2016008227 A1 WO2016008227 A1 WO 2016008227A1
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WO
WIPO (PCT)
Prior art keywords
beam splitter
touch screen
detecting unit
infrared
infrared touch
Prior art date
Application number
PCT/CN2014/089048
Other languages
English (en)
French (fr)
Inventor
王欢
辛武根
涂志中
尹傛俊
Original Assignee
京东方科技集团股份有限公司
合肥鑫晟光电科技有限公司
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 京东方科技集团股份有限公司, 合肥鑫晟光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/762,594 priority Critical patent/US10234995B2/en
Priority to EP14882157.2A priority patent/EP3171256B1/en
Publication of WO2016008227A1 publication Critical patent/WO2016008227A1/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
    • 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
    • G06F3/0412—Digitisers structurally integrated in a display

Definitions

  • Embodiments of the present invention relate to an infrared touch screen and display device.
  • touch screen is not only suitable for multimedia information query, but also has many advantages such as sturdy and durable, fast response, space saving and easy communication.
  • touch screen technology the user can operate the host by gently touching the icon or text on the computer display with a finger, so that the human-computer interaction is more straightforward. This technology greatly facilitates users who do not understand computer operations.
  • the touch screen can be divided into four types: resistive type, capacitive sensing type, infrared type and surface acoustic wave type.
  • the infrared touch screen is immune to current, voltage and static interference, and is suitable for harsh environmental conditions. Infrared technology is one of the future development trends of touch screen products.
  • a conventional infrared touch screen usually has a circuit board outer frame mounted on the front side of the display screen.
  • the circuit board outer frame arranges infrared emission tubes on adjacent sides of the quadrilateral screen, and the infrared receiving tubes are arranged on the other adjacent sides of the quadrilateral screen.
  • the infrared transmitting tube and the infrared receiving tube respectively correspond to two sides of the opposite screen, and the infrared transmitting tube and the infrared receiving tube are arranged one by one.
  • the infrared ray is emitted by the infrared emitting tube, and the infrared receiving tube receives the infrared ray to form an infrared matrix densely arranged in the X and Y directions to detect and locate the user's touch.
  • the traditional infrared touch screen has a complicated structure and high precision in design, and the power consumption of the touch screen is large due to the large number of infrared transmitting tubes.
  • Embodiments of the present invention provide an infrared touch screen and display device.
  • the number of light sources in the infrared touch screen is greatly reduced, thereby reducing the power consumption of the infrared touch screen and improving the touch performance of the infrared touch screen.
  • An embodiment of the present invention provides an infrared touch screen, wherein the infrared touch screen is quadrangular, and a plurality of light sources are disposed on a first side of the infrared touch screen, and are disposed on a second side opposite to the first side.
  • the infrared light emitted by the light source is partially received and partially reflected so that the infrared light emitted by the light source can form an optical path staggered in a network.
  • the number of the light source and the first detecting unit are the same and one-to-one correspondence; the number of the second detecting units on the third side and the fourth side is the same and one-to-one correspondence;
  • the number of one detecting unit is greater than or equal to the number of the second detecting units on the third side.
  • the first detecting unit includes a first beam splitter facing the light source and a first receiver, the first beam splitter corresponding to the first receiver and the first beam splitter ratio The first receiver is closer to the light source;
  • the second detecting unit on the third side includes a second beam splitter and a second receiver facing away from the third side, the third side
  • the second beam splitter above corresponds to the second receiver and the second beam splitter is further from the third side than the second receiver;
  • the The second detecting unit includes a second beam splitter and a second receiver facing away from the fourth side, the second beam splitter on the fourth side corresponding to the second receiver and the a second beam splitter is further from the fourth side than the second receiver;
  • the first beam splitter and the second beam splitter are for partially transmitting and partially reflecting incident infrared rays, a first receiver for receiving infrared light transmitted through the first beam splitter, and a second receiver for receiving transmission through the second beam splitter Infrared light.
  • the first beam splitter and the second beam splitter respectively include a transflective surface and a reflective surface, and the transflective surface of the first beam splitter and the reflective surface are less than 180° An angle between the transflective surface of the second beam splitter and the reflective surface is less than 180°.
  • the infrared touch screen is rectangular, the first side and the second side are long sides of a rectangle, and the third side and the fourth side are rectangular broad sides; the light source is evenly distributed in the On the first side, the first detecting unit is evenly distributed on the second side, and the second detecting unit is evenly distributed on the third side and the fourth side; the first detecting unit The number is twice the number of the second detecting units on the third side.
  • the first detecting unit is divided into an equal number of left side groups and right side groups from the middle, the left side group is adjacent to the third side, and the right side group is adjacent to the fourth side
  • the first detecting unit of the left group is symmetrical with the first detecting unit of the right group, the second detecting unit on the third side and the fourth side
  • the second detecting unit is symmetrical.
  • the transflective surface of the first beam splitter of the left side group faces the transflective surface of the second beam splitter on the third side;
  • the transflective surface of the first beam splitter faces the transflective surface of the second beam splitter on the fourth side.
  • the infrared touch screen is square, the light source is evenly distributed on the first side, the first detecting unit is evenly distributed on the second side, and the second detecting unit is evenly distributed in the first The three sides and the fourth side; the number of the first detecting units is equal to the number of the second detecting units on the third side.
  • the second detecting unit on the third side is symmetrical with the second detecting unit on the fourth side; the transflective surface and the third side of the first beam splitter
  • the transflective surface of the second beam splitter faces, or the perforated surface of the first beam splitter and the second beam splitter on the fourth side Facing the opposite side.
  • the first beam splitter and the second beam splitter are each in a triangular prism shape, and the transflective surface and the reflective surface are respectively two sides of the triangular prism, and the third side of the triangular prism is The angle between the transflective surface is 22.5°, the angle between the transflective surface of the first beam splitter and the reflecting surface is 67.5°, and the transflective surface of the second beam splitter An angle between the reflective surface and the reflecting surface is 112.5°; the third side of the first beam splitter is corresponding to the first receiver, and the second beam splitter is The third side is corresponding to the second receiver.
  • the transflective surface includes a transflective surface or a 1/3 transmissive 2/3 reverse surface.
  • Embodiments of the present invention also provide a display device including the above infrared touch screen.
  • the display device provided by the embodiment of the invention improves the touch display performance of the display device by using the infrared touch screen.
  • 1 is a top plan view of a structure of an infrared touch screen
  • FIG. 2 is a top plan view showing the structure of an infrared touch screen according to Embodiment 1 of the present invention
  • Figure 3 is a plan view showing the structure of the first detecting unit and the second detecting unit of Figure 2;
  • FIG. 4 is a schematic diagram of the optical path of the first detecting unit for transmitting and reflecting infrared rays in FIG. Figure
  • FIG. 5 is a schematic diagram of an optical path of the second detecting unit of FIG. 3 for transmitting and reflecting infrared rays;
  • FIG. 6 is a light path diagram formed by one of the left side light sources and one of the right side light sources of the infrared touch screen of FIG. 2;
  • FIG. 7 is a schematic view showing an optical path formed by one of the light sources of the infrared touch screen of FIG. 2;
  • FIG. 8 is a schematic diagram of an overall optical path formed by all light sources of the infrared touch screen of FIG. 2;
  • FIG. 9 is a view showing a state in which the first detecting unit and the second detecting unit corresponding to the finger touch points of points 1-9 in FIG. 8 receive light;
  • FIG. 10 is a top plan view showing the structure of an infrared touch screen according to Embodiment 2 of the present invention.
  • 11 is a light path diagram formed by one of the light sources of the infrared touch screen of FIG.
  • the infrared touch screen includes a quadrilateral display panel, and the display panel includes a first side, a second side, a third side, and a fourth side, wherein the first side and the second side are adjacent to each other (for example, the upper side And the right side), the first side and the third side are oppositely disposed, and the third side and the fourth side are adjacently arranged (for example, the lower side and the left side).
  • a plurality of infrared receiving tubes 8 are disposed on the first side and the second side of the adjacent arrangement, and a plurality of coated lenses 9 are respectively disposed on the third side and the fourth side, and one of the third side and the fourth side are respectively disposed
  • An infrared emitting tube 10 that emits infrared light to the coated lens 9 on the side, and the coated lens 9 is disposed at an angle to the received infrared ray for receiving the infrared portion
  • the corresponding infrared receiving tube 8 is reflected, and the received infrared portion is transmitted to the adjacent coated lens 9.
  • the above infrared touch screen replaces a plurality of launch tubes on two adjacent sides of the conventional display panel with an infrared emitting tube and a plurality of coated lenses respectively, and adjusts the angle between the coated lens and the incident light to make the emitted light accurate.
  • the ground is received by the corresponding infrared receiving tube to achieve the effect of the infrared touch screen.
  • the number of infrared emission tubes in the above infrared touch screen is reduced from two to two, which saves cost, but the coated infrared lens splits the infrared rays emitted by each infrared emission tube a plurality of times, and the more the bundle of one light beam is split.
  • the weaker the light intensity of the splitting light the touch of the infrared touch screen is easily disturbed by the ambient light, so that the touch performance of the infrared touch screen is greatly reduced.
  • the embodiment provides an infrared touch screen.
  • the infrared touch screen is quadrangular.
  • the first side 1 of the infrared touch screen is provided with a plurality of light sources 11 , and the second side 2 opposite to the first side 1 is disposed on the second side 2 .
  • a plurality of first detecting units 21, a plurality of second detecting units 31 are respectively disposed on the opposite third side 3 and fourth side 4 of the infrared touch screen. Both the first detecting unit 21 and the second detecting unit 31 can partially receive and partially reflect the infrared light emitted by the light source 11 so that the infrared light emitted by the light source 11 can form an optical path staggered in a mesh shape.
  • the number of the light sources 11 is greatly reduced relative to the arrangement of the infrared emitting tubes (ie, the infrared light sources) on the adjacent sides of the quadrilateral screen, thereby reducing the power consumption of the touch screen; A relatively large number of light sources 11 are provided. Therefore, the touch screen in the embodiment has a strong light intensity when touched, and is not interfered by external ambient light, and can further improve the touch performance of the touch screen.
  • the number of the light source 11 and the first detecting unit 21 are the same and one-to-one correspondence; the number of the second detecting units 31 on the third side 3 and the fourth side 4 is the same and one-to-one correspondence; the first detecting unit 21 The number is greater than the number of second detecting units 31 on the third side 3. In this way, after the infrared light emitted by each light source 11 is received and reflected by the first detecting unit 21 and the second detecting unit 31, the infrared light function can be realized, and the infrared light in the infrared touch process is ensured to have certain certain Intensity to protect the infrared touch from ambient light.
  • the first detecting unit 21 includes a first beam splitter 211 facing the light source 11 and a first receiver 212, the first beam splitter 211 and the first receiver 212 corresponding to the first beam splitter 211
  • the light source 11 is closer to the first receiver 212.
  • the second detecting unit 31 on the third side 3 includes a second beam splitter 311 and a second receiver 312 facing away from the third side 3, and a second beam splitter 311 and a second receiver 312 on the third side 3. Corresponding and the second beam splitter 311 is further away from the third side 3 than the second receiver 312.
  • the second detecting unit 31 on the fourth side 4 includes a second beam splitter 311 and a second receiver 312 facing away from the fourth side 4, and a second beam splitter 311 and a second receiver 312 on the fourth side 4. Corresponding and the second beam splitter 311 is further away from the fourth side 4 than the second receiver 312.
  • the first beam splitter 211 and the second beam splitter 311 are configured to partially and partially reflect incident infrared rays, and the first receiver 212 is configured to receive infrared rays transmitted through the first beam splitter 211, and the second receiving The 312 is configured to receive infrared light transmitted through the second beam splitter 311.
  • the first beam splitter 211 and the second beam splitter 311 respectively include a transflective surface 5 and a reflecting surface 6, and an angle between the transflective surface 5 of the first beam splitter 211 and the reflecting surface 6 is less than 180°, and the second The angle between the transflective surface 5 of the beam splitter 311 and the reflecting surface 6 is less than 180°.
  • the infrared beam of the light source 11 is reflected and transmitted by the first beam splitter 211 and the second beam splitter 311 so that the infrared touch screen realizes the infrared touch function.
  • the infrared touch screen has a rectangular shape, the first side 1 and the second side 2 are rectangular long sides, and the third side 3 and the fourth side 4 are rectangular wide sides.
  • the light source 11 is evenly distributed on the first side 1, the first detecting unit 21 is evenly distributed on the second side 2, and the second detecting unit 31 is evenly distributed on the third side 3 and the fourth side 4; the first detecting unit 21
  • the number is twice the number of second detecting units 31 on the third side 3.
  • the first detecting unit 21 is divided into an equal number of left side groups and right side groups from the middle, the left side group is adjacent to the third side 3, and the right side group is adjacent to the fourth side 4; the first detecting unit of the left side group 21 is symmetrical with the first detecting unit 21 of the right side group, and the second detecting unit 31 on the third side 3 is symmetrical with the second detecting unit 31 on the fourth side 4.
  • the transflective surface 5 of the first beam splitter 211 of the left side group faces the transflective surface 5 of the second beam splitter 311 on the third side 3; the first beam splitter 211 of the right side group The transflective surface 5 faces the transflective surface 5 of the second beam splitter 311 on the fourth side 4.
  • the first beam splitter 211 and the second beam splitter 311 are each formed in a triangular prism shape.
  • the triangular prism has three sides and two mutually parallel bottom surfaces, and the transflective surface 5 and the reflecting surface 6 are respectively two side surfaces of the triangular prism.
  • the angle between the third side 7 of the triangular prism and the transflective surface 5 is 22.5°
  • the angle between the transflective surface 5 of the first beam splitter 211 and the reflecting surface 6 is At 67.5°
  • the angle between the transflective surface 5 of the second beam splitter 311 and the reflecting surface 6 is 112.5°.
  • the third side 7 of the first beam splitter 211 (ie, the third side 7 of the triangular prism) is fitted to the first receiver 212, and the third side 7 of the second beam splitter 311 (ie, the triangular prism) The third side 7) is fitted to the second receiver 312.
  • the splitting process of the incident beam by the first beam splitter 211 is: the incident light is incident on the transflective surface 5 of the first beam splitter 211, and the transmitted light is incident on the first receiver 212 and received by the first receiver 212; Light reflected by the transflective surface 5 is emitted from the transflective surface 5.
  • the splitting process of the incident beam by the second beam splitter 311 is that the incident light is incident on the transflective surface 5 of the second beam splitter 311, and a part of the transmitted light is reflected by the reflecting surface 6 and then incident on the second receiver 312, and is The second receiver 312 receives; the light reflected by the transflective surface 5 is emitted from the transflective surface 5.
  • the first beam splitter 211 of the first detecting unit 21 transmits and reflects the incident light, and divides the incident light into two beams (ie, the first transmitted beam and the first reflected beam). .
  • a first reflected beam (such as light 2-2) can be incident on a second beam splitter 311 on the third side 3, through which the first reflected beam is split into two beams (ie, second transmission)
  • the beam and the second reflected beam), the second reflected beam (such as light 2-3) can be incident on a corresponding second beam splitter 311 on the fourth side 4, thereby forming a set of vertical and horizontal directions on the infrared touch screen Interlaced light paths (ie, optical paths formed by the intersection of light 2-1 and light 2-3).
  • the intersection of the optical paths of the group can be used as an infrared sensing point.
  • the finger blocks the infrared light passing through the infrared sensing point, and the first detecting unit 21 and the second detecting unit 31 that cannot receive the blocked infrared light can be based on the actual received infrared light signal. Determine the specific location of the infrared sensing point on the touch screen.
  • the second beam splitter 311 on the fourth side 4 can further divide the second reflected beam (such as the light ray 2-3) into two beams (ie, the third transmitted beam and the third reflected beam), and the third reflected beam (such as light 2-4) can be incident on a first detecting unit 21 of the right group, and the light transmitted through the transflective surface 5 of the right detecting unit 21 is incident on the reflecting surface of the first beam splitter 211. 6 , the light reflected by the reflecting surface 6 is incident on the first receiver 212 and received; the light reflected by the transflective surface 5 of the first detecting unit 21 of the right group is emitted from the transflective surface 5 and incident on the corresponding one.
  • each of the light sources 11 corresponding to the first detecting unit 21 of the right group can also form the same optical path, but only the optical path and the optical path formed by each of the light sources 11 corresponding to the first detecting unit 21 of the left group.
  • Direction The opposite is true (such as the light path formed by light 3-1, light 3-2, light 3-3, and light 3-4).
  • each of the light sources 11 can form a plurality of sets of the same optical path through the first detecting unit 21 and the second detecting unit 31, thereby implementing the touch function of the entire infrared touch screen.
  • the infrared touch screen in this embodiment has a relatively large number of light sources 11 under the premise of implementing infrared touch, and the infrared light emitted by each light source 11 only needs to be divided into three beams.
  • the infrared touch function is realized, which ensures that the split light of the infrared light still has a strong light intensity, so that the touch screen is not interfered by external ambient light when touched, thereby improving the touch performance of the touch screen.
  • the transflective surface 5 is a transflective surface. It should be noted that the transflective surface 5 may be a 1/3 transmissive 2/3 reverse surface, or a transflective surface 5 in which transmitted light and reflected light are distributed according to other ratios.
  • the optical path of the infrared touch screen of the above structure (taking the optical path of one of the light sources 11-2 as an example) is specifically as shown in FIG.
  • the infrared ray 2-1 emitted by the light source 11-2 is incident on the first detecting unit 21-2, the reflected light is 2-2, and the ray 2-2 is incident on the second detecting unit 31-2, and is reflected.
  • the light 2-3 is incident on the second detecting unit 31-8, and the second detecting unit 31-8 reflects a part of the light 2-4 to the first detecting unit 21-11.
  • an infrared touch light path of the entire infrared touch screen as shown in FIG. 8 can be formed.
  • points 1-9 are assumed finger touch points (ie, assuming that the finger touches these points).
  • the first detecting unit 21 and the second detecting unit 31 corresponding to the 1-9 points receive the light.
  • “ ⁇ ” indicates that the first detecting unit 21 or the second detecting unit 31 does not receive the light.
  • Light indicates that the first detecting unit 21 or the second detecting unit 31 has received light. According to the situation in which each of the first detecting unit 21 and each of the second detecting units 31 in FIG. 9 receives a signal, the position of each finger touch point is determined.
  • the process of specifically determining the position of each finger touch point is to determine the position of the touch point according to the situation that the first detecting unit 21 and the second detecting unit 31 receive the signal, and the determining process can be compiled by the program, and the specific content is no longer Detailed.
  • the embodiment provides an infrared touch screen. Different from Embodiment 1, as shown in FIG. 10, the infrared touch screen is square, the light source 11 is uniformly distributed on the first side 1, and the first detecting unit 21 is evenly distributed on the second side. 2, the second detecting unit 31 is evenly distributed on the third side 3 and the fourth side 4; the number of the first detecting units 21 is equal to the number of the second detecting units 31 on the third side 3.
  • the second detecting unit 31 on the third side 3 and the second detecting unit on the fourth side 4 31 is symmetrical; as shown in FIG. 11, the transflective surface 5 of the first beam splitter 211 faces the transflective surface 5 of the second beam splitter 311 on the third side 3.
  • the light emitted by one of the light sources 11 (such as the light ray 2-1) is incident on a first detecting unit 21 corresponding thereto, and the first detecting unit 21 is
  • the first beam splitter 211 transmits and reflects the incident light, splits the incident light into two beams (ie, the first transmitted beam and the first reflected beam), and the first reflected beam (such as the light 2-2) can be incident on the third side.
  • each of the light sources 11 can form a plurality of sets of the same optical path through the first detecting unit 21 and the second detecting unit 31, thereby implementing the touch function of the entire infrared touch screen.
  • transflective surface 5 of the first beam splitter 211 can also face the transflective surface 5 of the second beam splitter 311 on the fourth side 4, and the touch function of the infrared touch screen can also be realized.
  • the embodiment provides an infrared touch screen.
  • the shape of the infrared touch screen is any other shape of the quadrilateral except the rectangle and the square, as long as the first beam splitter and the second point are adjusted accordingly.
  • the angle between the transflective surface of the beam and the reflecting surface finally ensures that the infrared light emitted by the light source forms an optical path that is staggered in a mesh shape, and the touch function of the infrared touch screen can be realized.
  • a plurality of light sources are disposed on a first side of the quadrilateral infrared touch screen, a plurality of first detecting units are disposed on the second side, and a plurality of second portions are disposed on the third side and the fourth side.
  • the detecting unit receives and reflects the infrared light emitted by the light source by the first detecting unit and the second detecting unit, so that the infrared light emitted by the light source forms an optical path staggered in a mesh shape, thereby realizing the infrared touch function of the infrared touch screen;
  • the number of light sources is greatly reduced, thereby reducing the power consumption of the infrared touch screen; and the infrared light emitted by each light source only needs to be divided into three beams to realize the infrared touch function of the touch screen, which ensures
  • the splitting light of the infrared light has a strong light intensity, so that the touch screen is not interfered by the ambient light during the infrared touch, thereby improving the touch performance of the touch screen.
  • the embodiment provides a display device, including the infrared touch screen in any of Embodiments 1-3.
  • the touch display performance of the display device is improved.
  • the infrared touch screen provided by the embodiment of the invention provides a plurality of first detecting units on the second side and a plurality of second detecting units on the third side and the fourth side by providing a plurality of light sources on the first side of the quadrilateral infrared touch screen.
  • the receiving and reflecting of the infrared light emitted by the light source by the first detecting unit and the second detecting unit causes the infrared light emitted by the light source to form an optical path staggered in a mesh shape, thereby realizing the infrared touch function of the infrared touch screen;
  • the number of light sources is greatly reduced, thereby reducing the power consumption of the infrared touch screen; and the infrared light emitted by each light source only needs to be divided into three beams to realize the infrared touch function of the touch screen, which ensures infrared
  • the splitting light of the light has a strong light intensity, so that the touch screen is not interfered by external ambient light during infrared touch, thereby improving the touch performance of the touch screen.

Abstract

一种红外触摸屏，该红外触摸屏为四边形，该红外触摸屏的第一边（1）上设置有多个光源（11），与第一边（1）相对的第二边（2）上设置有多个第一探测单元（21），该红外触摸屏的相对的第三边（3）和第四边（4）上分别设置有多个第二探测单元（31），第一探测单元（21）和第二探测单元（31）均配置为能对光源发出的红外光线进行部分接收和部分反射，以使光源（11）发出的红外光线能形成交错呈网状的光路。该红外触摸屏具有降低的功耗以及改善的触控性能。

Description

红外触摸屏和显示装置 技术领域
本发明的实施例涉及一种红外触摸屏和显示装置。
背景技术
随着多媒体信息查询设备的与日俱增，人们越来越多地使用触摸屏。因为触摸屏不仅适用于多媒体信息查询，而且具有坚固耐用、反应速度快、节省空间和易于交流等许多优点。利用触摸屏技术，用户只要用手指轻轻地碰计算机显示屏上的图符或文字就能实现对主机的操作，从而人机交互更为直截。这种技术大大方便了那些不懂电脑操作的用户。
按照触摸屏的工作原理和传输信息的介质，触摸屏可以分为四种：电阻式、电容感应式、红外线式以及表面声波式。红外触摸屏不受电流、电压和静电干扰，适宜恶劣的环境条件，红外线技术是触摸屏产品未来的发展趋势之一。
传统的红外触摸屏通常是在显示屏幕的前面安装一个电路板外框，电路板外框在四边形屏幕的相邻两边排布红外发射管，在四边形屏幕的另外相邻两边排布红外接收管。通常，红外发射管和红外接收管分别对应位于两两相对的屏幕两边，且红外发射管和红外接收管一一对应设置。由红外发射管发射红外线，红外接收管接收红外线从而形成的在X、Y方向上密布的红外线矩阵来检测并定位用户的触摸。传统的红外触摸屏结构复杂，在设计上精度要求高，而且由于红外发射管数量较多，使得该触摸屏功耗较大。
发明内容
本发明的实施例提供一种红外触摸屏和显示装置。该红外触摸屏中光源的数量大大减少，从而降低了该红外触摸屏的功耗，提升了该红外触摸屏的触控性能。
本发明的实施例提供一种红外触摸屏，所述红外触摸屏为四边形，所述红外触摸屏的第一边上设置有多个光源，与所述第一边相对的第二边上设置 有多个第一探测单元，所述红外触摸屏的相对的第三边和第四边上分别设置有多个第二探测单元，所述第一探测单元和所述第二探测单元均能对所述光源发出的红外光线进行部分接收和部分反射，以使所述光源发出的红外光线能形成交错呈网状的光路。
例如，所述光源和所述第一探测单元的数量相同且一一对应；所述第三边和所述第四边上的所述第二探测单元的数量相同且一一对应；所述第一探测单元的数量大于等于所述第三边上的所述第二探测单元的数量。
例如，所述第一探测单元包括面向所述光源的第一分束器和第一接收器，所述第一分束器和所述第一接收器相对应且所述第一分束器比所述第一接收器更靠近所述光源；所述第三边上的所述第二探测单元包括背向所述第三边的第二分束器和第二接收器，所述第三边上的所述第二分束器和所述第二接收器相对应且所述第二分束器比所述第二接收器更远离所述第三边；所述第四边上的所述第二探测单元包括背向所述第四边的第二分束器和第二接收器，所述第四边上的所述第二分束器和所述第二接收器相对应且所述第二分束器比所述第二接收器更远离所述第四边；所述第一分束器和所述第二分束器用于对入射的红外光线进行部分透射和部分反射，所述第一接收器用于接收经所述第一分束器透射的红外光线，所述第二接收器用于接收经所述第二分束器透射的红外光线。
例如，所述第一分束器和所述第二分束器均分别包括透反面和反射面，所述第一分束器的所述透反面和所述反射面之间成小于180°的夹角，所述第二分束器的所述透反面和所述反射面之间成小于180°的夹角。
例如，所述红外触摸屏为长方形，所述第一边和所述第二边为长方形的长边，所述第三边和所述第四边为长方形的宽边；所述光源均匀分布在所述第一边上，所述第一探测单元均匀分布在所述第二边上，所述第二探测单元均匀分布在所述第三边和所述第四边上；所述第一探测单元的数量是所述第三边上的所述第二探测单元数量的两倍。
例如，所述第一探测单元从中间划分为数量相等的左侧组和右侧组，所述左侧组与所述第三边相邻，所述右侧组与所述第四边相邻；所述左侧组的所述第一探测单元与所述右侧组的所述第一探测单元相对称，所述第三边上的所述第二探测单元与所述第四边上的所述第二探测单元相对称。
例如，所述左侧组的所述第一分束器的所述透反面与所述第三边上的所述第二分束器的所述透反面相面对；所述右侧组的所述第一分束器的所述透反面与所述第四边上的所述第二分束器的所述透反面相面对。
例如，所述红外触摸屏为正方形，所述光源均匀分布在所述第一边上，所述第一探测单元均匀分布在所述第二边上，所述第二探测单元均匀分布在所述第三边和所述第四边上；所述第一探测单元的数量等于所述第三边上的所述第二探测单元的数量。
例如，所述第三边上的所述第二探测单元与所述第四边上的所述第二探测单元相对称；所述第一分束器的所述透反面与所述第三边上的所述第二分束器的所述透反面相面对，或者，所述第一分束器的所述透反面与所述第四边上的所述第二分束器的所述透反面相面对。
例如，所述第一分束器和所述第二分束器均呈三棱柱形，所述透反面和所述反射面分别为三棱柱的两个侧面，三棱柱的第三个侧面与所述透反面之间的夹角为22.5°，所述第一分束器的所述透反面与所述反射面之间的夹角为67.5°，所述第二分束器的所述透反面与所述反射面之间的夹角为112.5°；所述第一分束器的所述第三个侧面与所述第一接收器相对应贴合，所述第二分束器的所述第三个侧面与所述第二接收器相对应贴合。
例如，所述透反面包括半透半反面或1/3透2/3反面。
本发明的实施例还提供一种显示装置，包括上述红外触摸屏。
本发明实施例所提供的显示装置，通过采用上述红外触摸屏，提升了该显示装置的触控显示性能。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例，而非对本发明的限制。
图1为一种红外触摸屏的结构俯视图；
图2为本发明实施例1中红外触摸屏的结构俯视图；
图3为图2中第一探测单元和第二探测单元的结构俯视图；
图4为图3中第一探测单元对红外光线进行透射和反射的光路原理示意 图；
图5为图3中第二探测单元对红外光线进行透射和反射的光路原理示意图；
图6为图2中红外触摸屏的其中一个左侧光源和其中一个右侧光源形成的光路图；
图7为图2中红外触摸屏的其中一个光源形成的光路示意图；
图8为图2中红外触摸屏的所有光源形成的整体光路示意图；
图9为图8中1-9点的手指触摸点所对应的第一探测单元和第二探测单元接收光线的情况图；
图10为本发明实施例2中红外触摸屏的结构俯视图；
图11为图10中红外触摸屏的其中一个光源形成的光路图。
附图标记：
1.第一边；11.光源；2.第二边；21.第一探测单元；211.第一分束器；212.第一接收器；3.第三边；31.第二探测单元；311.第二分束器；312.第二接收器；4.第四边；5.透反面；6.反射面；7.第三个侧面；8.红外接收管；9.镀膜透镜；10.红外发射管。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员在无需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。
图1为一种红外触摸屏的示意图。如图1所示，该红外触摸屏包括一个四边形显示面板，该显示面板包括第一边、第二边、第三边和第四边，其中，第一边和第二边相邻设置(例如上边和右边)，第一边和第三边相对设置，第三边和第四边相邻设置(例如下边和左边)。相邻设置的第一边和第二边上设有多个红外接收管8，第三边和第四边上分别设有多个镀膜透镜9，第三边和第四边上分别设有一个向所在边上的镀膜透镜9发射红外线的红外发射管10，镀膜透镜9与接收的红外线成一夹角设置，用于将接收的红外线部分 向对应的红外接收管8进行反射，以及将接收的红外线部分向相邻的镀膜透镜9进行透射。
上述红外触摸屏将传统的显示面板上相邻两个边上的多个发射管分别用一个红外发射管和多个镀膜透镜来替代，通过调整镀膜透镜与入射光线的夹角，使出射光线能够准确地被相对应的红外接收管接收，从而达到红外触摸屏的效果。上述红外触摸屏中红外发射管的数量由多个减少为两个，这节约了成本，但经过镀膜透镜对每个红外发射管发射的红外线进行了多次分束，一束光线的分束越多，则分束光线的光强越弱，这很容易使红外触摸屏的触控受到外界环境光的干扰，以至于会大大降低红外触摸屏的触控性能。
实施例1
本实施例提供一种红外触摸屏，如图2所示，该红外触摸屏为四边形，红外触摸屏的第一边1上设置有多个光源11，与第一边1相对的第二边2上设置有多个第一探测单元21，红外触摸屏的相对的第三边3和第四边4上分别设置有多个第二探测单元31。第一探测单元21和第二探测单元31均能对光源11发出的红外光线进行部分接收和部分反射，以使光源11发出的红外光线能形成交错呈网状的光路。
本实施例中的红外触摸屏，相对于在四边形屏幕的相邻两边排布红外发射管(即红外光源)的方式，光源11的数量大大减少，从而降低了触摸屏的功耗；同时，这又保持了数量相对较多的光源11。这使得本实施例中的触摸屏在触控时的光强较强，不会受到外界环境光的干扰，能够进一步提升该触摸屏的触控性能。
本实施例中，光源11和第一探测单元21的数量相同且一一对应；第三边3和第四边4上的第二探测单元31的数量相同且一一对应；第一探测单元21的数量大于第三边3上的第二探测单元31的数量。如此设置，便于每个光源11发出的红外光线经第一探测单元21和第二探测单元31接收和反射之后，能在实现红外触控功能的同时，确保红外触控过程中红外光线具备一定的强度，以使红外触控免受外界环境光的干扰。
如图3所示，第一探测单元21包括面向光源11的第一分束器211和第一接收器212，第一分束器211和第一接收器212相对应且第一分束器211比第一接收器212更靠近光源11。
第三边3上的第二探测单元31包括背向第三边3的第二分束器311和第二接收器312，第三边3上的第二分束器311和第二接收器312相对应且第二分束器311比第二接收器312更远离第三边3。
第四边4上的第二探测单元31包括背向第四边4的第二分束器311和第二接收器312，第四边4上的第二分束器311和第二接收器312相对应且第二分束器311比第二接收器312更远离第四边4。
第一分束器211和第二分束器311用于对入射的红外光线进行部分透射和部分反射，第一接收器212用于接收经第一分束器211透射的红外光线，第二接收器312用于接收经第二分束器311透射的红外光线。
第一分束器211和第二分束器311均分别包括透反面5和反射面6，第一分束器211的透反面5和反射面6之间成小于180°的夹角，第二分束器311的透反面5和反射面6之间成小于180°的夹角。如此设置，便于第一分束器211和第二分束器311对光源11发出的红外光线进行反射和透射，以便红外触摸屏实现红外触控功能。
本实施例中，如图2和图3所示，红外触摸屏的外形为长方形，第一边1和第二边2为长方形的长边，第三边3和第四边4为长方形的宽边；光源11均匀分布在第一边1上，第一探测单元21均匀分布在第二边2上，第二探测单元31均匀分布在第三边3和第四边4上；第一探测单元21的数量是第三边3上的第二探测单元31数量的两倍。
第一探测单元21从中间划分为数量相等的左侧组和右侧组，左侧组与第三边3相邻，右侧组与第四边4相邻；左侧组的第一探测单元21与右侧组的第一探测单元21相对称，第三边3上的第二探测单元31与第四边4上的第二探测单元31相对称。
本实施例中，左侧组的第一分束器211的透反面5与第三边3上的第二分束器311的透反面5相面对；右侧组的第一分束器211的透反面5与第四边4上的第二分束器311的透反面5相面对。
如图4和图5所示，第一分束器211和第二分束器311均呈三棱柱形。需要说明的是，三棱柱有三个侧面和两个相互平行的底面，透反面5和反射面6分别为三棱柱的其中两个侧面。例如三棱柱的第三个侧面7与透反面5之间的夹角为22.5°，第一分束器211的透反面5与反射面6之间的夹角为 67.5°，第二分束器311的透反面5与反射面6之间的夹角为112.5°。第一分束器211的第三个侧面7(即三棱柱的第三个侧面7)与第一接收器212相对应贴合，第二分束器311的第三个侧面7(即三棱柱的第三个侧面7)与第二接收器312相对应贴合。
第一分束器211对入射光线的分束过程为：入射光入射至第一分束器211的透反面5，透射的光线射入第一接收器212，并被第一接收器212接收；经透反面5反射的光线从透反面5射出。
第二分束器311对入射光线的分束过程为：入射光入射至第二分束器311的透反面5，透射的一部分光线经反射面6反射后射入第二接收器312，并被第二接收器312接收；经透反面5反射的光线从透反面5射出。
如图6所示，按照图2-图5中的结构设置，能使与左侧组的第一探测单元21相对应的其中一个光源11发出的光线(如光线2-1)入射至与其相对应的一个第一探测单元21上，经这个第一探测单元21的第一分束器211对入射光线进行透射和反射，将入射光线分成两束(即第一透射束和第一反射束)。第一反射束(如光线2-2)能入射至第三边3上的一个第二分束器311上，经该第二分束器311将第一反射束分成两束(即第二透射束和第二反射束)，第二反射束(如光线2-3)能入射至第四边4上的一个相应的第二分束器311上，至此便能在红外触摸屏上形成一组纵横交错的光路(即由光线2-1和光线2-3纵横交错形成的光路)。该组光路的纵横交错点即可作为一个红外感应点。当用户在触摸屏幕时，手指会挡住经过该红外感应点的红外光线，接收不到被挡住的红外光线的第一探测单元21和第二探测单元31根据实际接收到的红外光线信号的情况可以判断出红外感应点在触摸屏上的具体位置。另外，经第四边4上的该第二分束器311还能将第二反射束(如光线2-3)分成两束(即第三透射束和第三反射束)，第三反射束(如光线2-4)能入射至右侧组的一个第一探测单元21上，经该右侧组第一探测单元21透反面5透射的光线入射到其第一分束器211的反射面6上，经反射面6反射的光线入射至其第一接收器212并被接收；经该右侧组第一探测单元21透反面5反射的光线从透反面5射出并入射到相对应的其中一个光源11。同理，与右侧组的第一探测单元21相对应的每个光源11也能形成同样的光路，只是该光路和与左侧组第一探测单元21相对应的每个光源11形成的光路方向 恰好相反(如由光线3-1、光线3-2、光线3-3和光线3-4形成的光路)。按照上述光路形成的原理，每个光源11都能通过第一探测单元21和第二探测单元31形成多组同样的光路，从而实现整个红外触摸屏的触控功能。
相对于图1中的红外触摸屏，本实施例中的红外触摸屏在实现红外触控的前提下，光源11的数量相对较多，且每个光源11发出的红外光线只需要被分成三束即可实现红外触控功能，这能确保红外光线的分束光线仍具有较强的光强，从而使该触摸屏在触控时不会受到外界环境光的干扰，进而提升了该触摸屏的触控性能。
本实施例中，透反面5为半透半反面。需要说明的是，透反面5也可以是1/3透2/3反面，或者按照其他比例进行透射光和反射光分配的透反面5。
上述结构的红外触摸屏的光路历程(以其中一个光源11-2的光路历程为例)具体为如图7所示。由光源11-2发射的红外光线2-1入射到第一探测单元21-2上，被反射的光线为2-2，光线2-2入射到第二探测单元31-2上，被反射的光线2-3入射到第二探测单元31-8上，第二探测单元31-8会反射一部分光线2-4到第一探测单元21-11。
按照上述光路历程，即可形成如图8所示的整个红外触摸屏的红外触控光路。图中，点1-9为假定的几个手指触摸点(即假定手指触摸了这几个点)。如图9所示为1-9点所对应的第一探测单元21和第二探测单元31接收光线的情况，图9中“×”表示第一探测单元21或第二探测单元31没有接收到光线，“√”表示第一探测单元21或第二探测单元31接收到了光线。根据图9中各个第一探测单元21和各个第二探测单元31接收信号的情况，判断各个手指触控点的位置。具体判断各个手指触控点位置的过程为通过程序根据第一探测单元21和第二探测单元31接收信号的情况做出触控点位置判断，该判断过程可通过程序编译得到，具体内容不再详述。
实施例2
本实施例提供一种红外触摸屏，与实施例1不同的是，如图10所示，红外触摸屏为正方形，光源11均匀分布在第一边1上，第一探测单元21均匀分布在第二边2上，第二探测单元31均匀分布在第三边3和第四边4上；第一探测单元21的数量等于第三边3上的第二探测单元31的数量。
相应地，第三边3上的第二探测单元31与第四边4上的第二探测单元 31相对称；如图11所示，第一分束器211的透反面5与第三边3上的第二分束器311的透反面5相面对。
本实施例中红外触摸屏的其他结构与实施例1中相同，此处不再赘述。
按照本实施例中红外触摸屏的上述结构设置，能使其中一个光源11发出的光线(如光线2-1)入射至与其相对应的一个第一探测单元21上，经这个第一探测单元21的第一分束器211对入射光线进行透射和反射，将入射光线分成两束(即第一透射束和第一反射束)，第一反射束(如光线2-2)能入射至第三边3上的一个第二分束器311上，经该第二分束器311将第一反射束分成两束(即第二透射束和第二反射束)，第二反射束(如光线2-3)能入射至第四边4上的一个相应的第二分束器311上，至此，便能在红外触摸屏上形成一组纵横交错的光路(即由光线2-1和光线2-3纵横交错形成的光路)。按照上述光路形成的原理，每个光源11都能通过第一探测单元21和第二探测单元31形成多组同样的光路，从而实现整个红外触摸屏的触控功能。
需要说明的是，第一分束器211的透反面5也可以与第四边4上的第二分束器311的透反面5相面对，同样能够实现红外触摸屏的触控功能。
实施例3
本实施例提供一种红外触摸屏，与实施例1-2不同的是，红外触摸屏的形状为除长方形和正方形以外的任意的其他四边形的形状，只要相应地调整第一分束器和第二分束器的透反面与反射面之间的夹角角度，最终确保光源发出的红外光线形成交错呈网状的光路，能够实现红外触摸屏的触控功能即可。
实施例1-3所提供的红外触摸屏中，在四边形红外触摸屏的第一边设置多个光源，在第二边设置多个第一探测单元，在第三边和第四边设置多个第二探测单元；通过第一探测单元和第二探测单元对光源发出的红外光线的接收与反射，使光源发出的红外光线形成交错呈网状的光路，从而实现了该红外触摸屏的红外触控功能；相对于传统的红外触摸屏，光源的数量大大减少，从而降低了该红外触摸屏的功耗；而且每个光源发出的红外光线只需要分成三束即可实现该触摸屏的红外触控功能，这确保了红外光线的分束光线具有较强的光强，从而使该触摸屏在红外触控时不会受到外界环境光的干扰，进而提升了该触摸屏的触控性能。
实施例4
本实施例提供一种显示装置，包括实施例1-3任一中的红外触摸屏。
通过采用实施例1-3任一中的红外触摸屏，提升了该显示装置的触控显示性能。
本发明实施例所提供的红外触摸屏，通过在四边形红外触摸屏的第一边设置多个光源，在第二边设置多个第一探测单元，在第三边和第四边设置多个第二探测单元；通过第一探测单元和第二探测单元对光源发出的红外光线的接收与反射，使光源发出的红外光线形成交错呈网状的光路，从而实现了该红外触摸屏的红外触控功能；相对于传统的红外触摸屏，光源的数量大大减少，从而降低了该红外触摸屏的功耗；而且每个光源发出的红外光线只需要分成三束即可实现该触摸屏的红外触控功能，这确保了红外光线的分束光线具有较强的光强，从而使该触摸屏在红外触控时不会受到外界环境光的干扰，进而提升了该触摸屏的触控性能。
以上所述仅是本发明的示范性实施方式，而非用于限制本发明的保护范围，本发明的保护范围由所附的权利要求确定。
本申请要求于2014年7月15日递交的中国专利申请第201410336365.1号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (12)

  1. 一种红外触摸屏，所述红外触摸屏为四边形，其中，所述红外触摸屏的第一边上设置有多个光源，与所述第一边相对的第二边上设置有多个第一探测单元，所述红外触摸屏的相对的第三边和第四边上分别设置有多个第二探测单元，
    所述第一探测单元和所述第二探测单元均配置为能对所述光源发出的红外光线进行部分接收和部分反射，以使所述光源发出的红外光线能形成交错呈网状的光路。
  2. 根据权利要求1所述的红外触摸屏，其中，所述光源和所述第一探测单元的数量相同且一一对应；所述第三边和所述第四边上的所述第二探测单元的数量相同且一一对应；所述第一探测单元的数量大于等于所述第三边上的所述第二探测单元的数量。
  3. 根据权利要求2所述的红外触摸屏，其中，所述第一探测单元包括面向所述光源的第一分束器和第一接收器，所述第一分束器和所述第一接收器相对应且所述第一分束器比所述第一接收器更靠近所述光源；
    所述第三边上的所述第二探测单元包括背向所述第三边的第二分束器和第二接收器，所述第三边上的所述第二分束器和所述第二接收器相对应且所述第二分束器比所述第二接收器更远离所述第三边；
    所述第四边上的所述第二探测单元包括背向所述第四边的第二分束器和第二接收器，所述第四边上的所述第二分束器和所述第二接收器相对应且所述第二分束器比所述第二接收器更远离所述第四边；
    所述第一分束器和所述第二分束器用于对入射的红外光线进行部分透射和部分反射，所述第一接收器用于接收经所述第一分束器透射的红外光线，所述第二接收器用于接收经所述第二分束器透射的红外光线。
  4. 根据权利要求3所述的红外触摸屏，其中，所述第一分束器和所述第二分束器均分别包括透反面和反射面，所述第一分束器的所述透反面和所述反射面之间成小于180°的夹角，所述第二分束器的所述透反面和所述反射面之间成小于180°的夹角。
  5. 根据权利要求4所述的红外触摸屏，其中，所述红外触摸屏为长方形， 所述第一边和所述第二边为长方形的长边，所述第三边和所述第四边为长方形的宽边；
    所述光源均匀分布在所述第一边上，所述第一探测单元均匀分布在所述第二边上，所述第二探测单元均匀分布在所述第三边和所述第四边上；
    所述第一探测单元的数量是所述第三边上的所述第二探测单元数量的两倍。
  6. 根据权利要求5所述的红外触摸屏，其中，所述第一探测单元从中间划分为数量相等的左侧组和右侧组，所述左侧组与所述第三边相邻，所述右侧组与所述第四边相邻；
    所述左侧组的所述第一探测单元与所述右侧组的所述第一探测单元相对称，所述第三边上的所述第二探测单元与所述第四边上的所述第二探测单元相对称。
  7. 根据权利要求6所述的红外触摸屏，其中，所述左侧组的所述第一分束器的所述透反面与所述第三边上的所述第二分束器的所述透反面相面对；
    所述右侧组的所述第一分束器的所述透反面与所述第四边上的所述第二分束器的所述透反面相面对。
  8. 根据权利要求4所述的红外触摸屏，其中，所述红外触摸屏为正方形，所述光源均匀分布在所述第一边上，所述第一探测单元均匀分布在所述第二边上，所述第二探测单元均匀分布在所述第三边和所述第四边上；所述第一探测单元的数量等于所述第三边上的所述第二探测单元的数量。
  9. 根据权利要求8所述的红外触摸屏，其中，所述第三边上的所述第二探测单元与所述第四边上的所述第二探测单元相对称；
    所述第一分束器的所述透反面与所述第三边上的所述第二分束器的所述透反面相面对，或者，所述第一分束器的所述透反面与所述第四边上的所述第二分束器的所述透反面相面对。
  10. 根据权利要求7或9所述的红外触摸屏，其中，所述第一分束器和所述第二分束器均呈三棱柱形，所述透反面和所述反射面分别为三棱柱的两个侧面，三棱柱的第三个侧面与所述透反面之间的夹角为22.5°，所述第一分束器的所述透反面与所述反射面之间的夹角为67.5°，所述第二分束器的所述透反面与所述反射面之间的夹角为112.5°；
    所述第一分束器的所述第三个侧面与所述第一接收器相对应贴合，所述第二分束器的所述第三个侧面与所述第二接收器相对应贴合。
  11. 根据权利要求10所述的红外触摸屏，其中，所述透反面包括半透半反面或1/3透2/3反面。
  12. 一种显示装置，包括权利要求1-11任意一项所述的红外触摸屏。
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