WO2014190599A1

WO2014190599A1 - Infrared touchscreen

Info

Publication number: WO2014190599A1
Application number: PCT/CN2013/079814
Authority: WO
Inventors: 孙文佳; 尹大根
Original assignee: 京东方科技集团股份有限公司; 北京京东方显示技术有限公司
Priority date: 2013-05-30
Filing date: 2013-07-22
Publication date: 2014-12-04
Also published as: CN103268173A; CN103268173B

Abstract

An infrared touchscreen comprises a quadrilateral display panel. Multiple infrared receiving pipes are disposed on a first side and a second side which are adjacent on the display panel. Multiple coated lenses are separately disposed on a third side and a fourth side which are adjacent on the display panel. At least one infrared emitting pipe is separately disposed on the third side and the fourth side. The infrared emitting pipe emits infrared light to each coated lens on the side where the infrared emitting pipe is located. An included angle is formed between the coated lens and the received infrared light. The coated lens is used for partially reflecting the received infrared light to the corresponding infrared receiving pipe and partially transmitting the received infrared light to the adjacent coated lens. The infrared touchscreen can reduce the number of the infrared emitting pipes to reduce the power consumption and save the cost, and a problem is easy to be found and replacement is easy.

Description

Infrared touch screen

Embodiments of the invention relate to an infrared touch screen. Background technique

With the increasing number of multimedia information inquiry devices, people are increasingly using touch screens. The touch screen is not only suitable for multimedia information inquiry, but also has many advantages such as sturdy and durable, fast response, space saving, and easy communication. With touch technology, users can operate the host computer by gently touching the icon or text on the computer display with their fingers, thus making human-computer interaction more straightforward. This technology greatly facilitates users who do not understand computer operation. .

According to the working principle of the touch screen and the medium for transmitting information, 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 electricity, and is suitable for harsh environmental conditions. Infrared technology is a trend in touch screen products.

The infrared touch screen includes a display screen and a touch module installed in front of the display screen. The touch module includes a circuit board outer frame, and the outer frame of the circuit board is arranged on the four sides of the screen, and the infrared transmitting tube and the infrared receiving tube are arranged one by one. The board frame uses an infrared matrix densely packed in the X and Y directions to detect and position the user's touch. The number of tubes on the existing infrared touch screen is relatively large, and the arrangement is complicated, and detailed requirements for precise positioning are required.

FIG. 1 is a schematic structural view of a conventional infrared touch screen. The touch screen includes a rectangular or square display panel 10 of a first side 1, a second side 2, a third side 3, and a fourth side 4. The first side 1 and the third side 3 are oppositely disposed, and the second side 2 is disposed opposite to the fourth side 4. A plurality of infrared receiving tubes 5 are disposed on the first side 1 and the second side 2, and infrared emitting tubes 6 corresponding to the infrared receiving tubes 5 are distributed on the third side 3 and the fourth side 4. The infrared transmitting tubes on the third side 3 and the fourth side 4 adjacently disposed emit an intersecting infrared matrix. When the user touches the screen, the finger blocks the two infrared rays passing through the touched position, so that the position of the touched point on the screen can be judged. Since the infrared transmitting tube and the infrared receiving tube need to have a one-to-one correspondence, the structure is complicated, and the design requires high precision. Moreover, once a launch tube is damaged, it is not easy to find, which causes inconvenience in replacement. Summary of the invention

Embodiments of the present invention provide an infrared touch screen device that is structurally simple and low in cost. One aspect of the present invention provides a quadrilateral display panel, wherein two adjacent first and second sides of the display panel are provided with a plurality of infrared receiving tubes, and two adjacent third sides are a plurality of coated lenses are respectively disposed on the fourth side, and the third side and the fourth side are respectively provided with at least one infrared emitting tube that emits infrared rays to the coated lens of the side; the 3⁄4 lens is integrated with the received infrared rays The included angle is configured to reflect the infrared portion received from the corresponding infrared transmitting tube to the corresponding infrared receiving tube, and transmit the received infrared portion to the adjacent next mo lens.

For example, the coated lens can be placed at 120-140 degrees from the received infrared light.

For example, the coated lens may include a plane mirror and a coating provided on the surface of the plane mirror, the coating layer facing the incident direction of the infrared rays.

For example, the at least one infrared transmitting tube may be disposed at an angle between the third side and the fourth side. For example, the coating on the third and fourth sides of the |3⁄4 lens furthest from the infrared emitter on the side may be a total reflection film.

For example, at least one infrared emitting tube may be disposed between the plurality of coated lenses.

For example, the at least one infrared transmitting tube can be an infrared LED.

For example, the coated lens can be coupled to an adjustment unit for adjusting the angle of the !3 lens with the received infrared light.

The infrared touch screen of the embodiment of the present invention greatly reduces the number of infrared transmitting tubes to reduce power consumption and cost, and is easier to replace once the emitted light has a problem. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present invention, rather than to the present invention. limit.

1 is a schematic structural view of a conventional infrared touch screen;

2 is a schematic structural view of an infrared touch screen according to a first embodiment of the present invention;

3 is a schematic structural diagram of an infrared touch screen according to a second embodiment of the present invention;

4 is a schematic structural view of an infrared touch screen according to a third embodiment of the present invention. detailed description

The technical solutions of the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings of the embodiments of the present invention. It is apparent that the described embodiments are part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention.

2 is a schematic structural view of an infrared touch screen according to a first embodiment of the present invention. The infrared touch screen includes a quadrilateral display panel 100. The display panel 100 includes a first side 1, a second side 2, a third side 3, and a fourth side 4; the first side 1 and the second side 2 are disposed adjacent to each other, and the first side 1 and the third side 3 are oppositely disposed. The third side 3 and the fourth side 4 are disposed adjacent to each other. The first side 1 and the second side 2 adjacent to each other are provided with a plurality of infrared receiving tubes 5, and the third side 3 and the fourth side 4 are respectively provided with a plurality of 3⁄4 mo lenses 7, 3rd side 3 and The four sides 4 are respectively provided with an infrared emission tube 6 for emitting infrared rays to the coated lens 7 on the side. The mo lens 7 is disposed at an angle α with the infrared ray received from the infrared emission tube 6 for partially reflecting the received infrared ray to the corresponding infrared receiving tube 5, and directing the received infrared ray portion to the next adjacent coating layer. The lens 7 is transmitted.

For example, a plurality of! 3⁄4 lenses 7 on the third side 3 and a plurality of infrared receiving tubes 5 on the first side 1 - correspondingly arranged; a plurality of 3⁄4 lenses 7 and 2 on the fourth side 4 A plurality of infrared receiving tubes 5 - one corresponding setting.

Similarly, the infrared transmitting tubes 6 on the third side 3 and the fourth side 4 disposed adjacently cooperate with the plurality of mo lenses 7 to emit an intersecting infrared matrix; when the user touches the touch screen of the embodiment, such as a finger or a touch The pen will block the two infrared rays passing through the touch point TP, so that the signal fed back by the infrared receiving tube 5 can determine the position of the touch point TP in the screen, and then perform the corresponding operation.

The infrared touch screen of this embodiment replaces a plurality of launch tubes on two adjacent sides of the display panel 100 shown in FIG. 1 with a single launch tube and a plurality of 3⁄4 lenses, respectively, by adjusting the lens and the incident light. The angle of the light is such that the emitted light can be accurately received by the corresponding infrared receiving tube, thereby achieving the effect of the infrared touch screen. The structure of the embodiment greatly reduces the number of infrared transmitting tubes, reduces power consumption, and saves cost. Since the number of infrared emission tubes is reduced to two, once problems occur, it is easier to find and replace them.

The surface of the coated lens 7 of the present embodiment is coated with a coating made of a reflective material for receiving The infrared rays partially reflect toward the corresponding infrared receiving tube 5 on the opposite side, and transmit the received infrared portion to the adjacent next coated lens 7. The coating of the I3⁄4 lens 7 can be plated into a transflective film for the infrared wavelength emitted by the infrared emission tube 6, and the transmittance of the coating can be selected according to the screen size. The coated lens of this embodiment is, for example, coated on the surface of the plane mirror with a coating facing the incident direction of the infrared ray, and the lens is disposed at 120-140 degrees with the received infrared ray, for example, 134-136 degrees. That is, the coated lens 7 is at about 45 degrees from the side (the third side 3 and the fourth side 4) where it is located.

Since the 3⁄4 lens 7 reflects a part of the received infrared light to the corresponding infrared receiving tube 5 on the opposite side, and the other part is transmitted to the adjacent next coated lens 7, the next coated lens 7 divides the received infrared light again. The reflected light and the transmitted light are reflected, and the reflected light can be detected by the corresponding infrared receiving tube 5. In this embodiment, the magnetic lens 7 is used to realize the cross-set infrared rays, and the function of the infrared touch panel can also be realized.

The infrared emission tube 6 of the present embodiment is disposed at an angle between the third side and the fourth side, and may be, for example, an infrared light emitting diode (LED). In this embodiment, an infrared LED is used as an infrared emitting tube, which has the advantages of good chromaticity, high brightness, strong directivity, and difficulty in diverging light, thereby achieving the use of LEDs with a small number of pixels to emit infrared light.

Referring again to Fig. 2, the first infrared emission tube 61 on the third side 3 is disposed at a corner of the third side 3 near the fourth side 4, and emits infrared light to the coated lens 7 on the third side 3. The second infrared emission tube 62 on the fourth side 4 is disposed at a corner of the fourth side 4 near the third side 3, and emits infrared light to the I3⁄4 lens 7 on the fourth side 4. In order to prevent the transmitted infrared light from being reflected by the frame into the touch screen sensing area to interfere with the touch effect, the third side 3 and the fourth side 4 are farthest from the infrared emitting tube 6 on the side of the side; 3⁄4 The coating on the lens 7 may be The total reflection film, whereby no light is transmitted to the frame outside the farthest lens 31.

3 is a schematic structural diagram of an infrared touch screen according to a second embodiment of the present invention. The infrared touch screen of the embodiment includes a rectangular display panel 200. The first side 1 and the third side 3 of the display panel 200 are long sides, and the second side is 2 and the fourth side 4 are short sides. The fourth side 4 of the long side is provided with a plurality of 3⁄4 lenses 7, and another infrared transmitting tube 6, i.e., a third infrared transmitting tube 63, is disposed between the 3⁄4 lenses 7. A circuit board outer frame may be disposed at a front portion of the display panel, and the infrared emitting tube 6 and the infrared receiving tube 5 and the coated lens 7 are disposed in the outer frame of the circuit board. The specific structure of the circuit board outer frame can be, for example, the design of the circuit board outer frame of the existing touch screen. The third infrared transmitting tube 63 is disposed, for example, at a distance of the third side 3 The end of the first infrared emission tube 61 is placed at a position of about half or 2/3 of the length, and is disposed at the same height as the first infrared emission tube 61.

Since the infrared rays emitted from the infrared emission tube 6 pass through the lens 7, there is a loss of light. In order to enhance the intensity of the infrared light, an infrared emission tube 6 is further disposed between the mo lenses 7. The infrared emission tube 6 is adjacent to the second side 2 to enhance the intensity of the infrared light. Assume that the original light intensity is 1, the Mo's reflectivity is a, and the transmittance is (1-a). After passing through the n-plane lens, the reflected light intensity is In(ref)=a* (la) ⁰¹ — ¹ ), transmitted light intensity In(trm)=(la) ⁿ . With the increase in the number of 7⁄4 lenses, the intensity of infrared light transmission is reduced, and an infrared emission tube 6 is added to enhance the intensity of the infrared light. In this embodiment, another third infrared emission tube 63 is disposed between the coated lenses on the third side 3, and an infrared emission tube may be disposed on the fourth side 4 of the short side. Of course, if the long side of the display panel is long, more infrared emission tubes 6 can be provided to enhance the intensity of the infrared light.

4 is a schematic structural diagram of an infrared touch screen according to a third embodiment of the present invention. The infrared touch screen of the embodiment includes a square display panel 300. The front panel of the display panel 300 is provided with a circuit board frame, an infrared emitting tube 6 and an infrared The receiving tube 5 and the ?3 lens 7 are disposed in the outer frame of the circuit board. Each of the lenses of this embodiment is connected to an adjustment unit 8 for adjusting the angle between the lens and the received infrared light. Each of the 3⁄4 lenses 7 of the present embodiment is connected to the side, for example, via a rotating shaft. The adjusting unit 8 is connected to each of the rotating shafts by a motor, and is adjusted by the rotation of the driving motor to adjust the inclination of the lens 7 with the side. In addition, the adjusting unit 8 of the present embodiment can also precisely adjust the inclination of the lens 7 according to the display result, for example, dynamically adjusting the angle between the mo lens 7 and the infrared ray received from the infrared emission tube 6 according to the display result.

The infrared touch screen of the embodiment of the present invention replaces a plurality of launch tubes on two adjacent sides of the display panel with a single launch tube and a plurality of 3⁄4 lenses, by adjusting the angle between the lens and the incident light. The outgoing light can be accurately received by the corresponding infrared receiving tube, thereby achieving low power consumption and cost saving. Since the number of infrared emission tubes is reduced to two, it is easier to replace in case of problems.

The above is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims.

Claims

Claim

An infrared touch screen, comprising a quadrilateral display panel, wherein two adjacent first and second sides of the display panel are provided with a plurality of infrared receiving tubes, and the other two adjacent third a plurality of! 3⁄4 lenses are respectively disposed on the side and the fourth side, and the third side and the fourth side are respectively provided with at least one infrared transmitting tube that emits infrared rays to the mo lens of the side; the 3⁄4 lens and the receiving The infrared rays are disposed at an angle for reflecting the infrared portion received from the corresponding infrared transmitting tube toward the corresponding infrared receiving tube, and transmitting the received infrared portion to the adjacent next!

The infrared touch panel according to claim 1, wherein the mo lens is disposed at 120-140 degrees from the received infrared line.

The infrared touch panel according to claim 1 or 2, wherein the mo lens comprises a flat mirror and a coating provided on a surface of the plane mirror, the coating being oriented in the incident direction of the infrared ray.

The infrared touch screen according to any one of claims 1 to 3, wherein the at least one infrared transmitting tube is disposed at an angle between the third side and the fourth side.

5. The infrared touch screen according to claim 4, wherein the coating on the third side and the fourth side that is farthest from the infrared transmitting tube on the side of the edge is a total reflection film.

The infrared touch screen according to any one of claims 1 to 5, wherein at least one infrared transmitting tube is further disposed between the plurality of coated lenses on the third side or the fourth side.

The infrared touch screen according to any one of claims 1 to 6, wherein the at least one infrared transmitting tube is an infrared LED.

The infrared touch screen according to any one of claims 1 to 7, wherein the mo lens is connected with an adjusting unit, and the adjusting unit is configured to adjust an angle between the lens and the received infrared ray.