WO2014005368A1

WO2014005368A1 - Infrared touch screen employing light distribution lens

Info

Publication number: WO2014005368A1
Application number: PCT/CN2012/080156
Authority: WO
Inventors: 陈伟山
Original assignee: 深圳市天时通科技有限公司
Priority date: 2012-07-03
Filing date: 2012-08-15
Publication date: 2014-01-09
Also published as: CN102750049B; CN102750049A

Abstract

An infrared touch screen employing a light distribution lens, comprising a liquid crystal display, and an infrared transceiver module; the infrared transceiver module comprises an infrared transmitting array consisting of a plurality of infrared transmitting tubes, an infrared receiving array consisting of a plurality of infrared receiving tubes, and a printed circuit board; the infrared transmitting array and the infrared receiving array are both welded on the printed circuit board, and are both located behind the display surface of the liquid crystal display; the transmitting end of the infrared transmitting array and the receiving end of the infrared receiving array are provided with an optical assembly therebetween; the optical assembly enables the infrared rays emitted by the infrared transmitting array to form an infrared ray detection grid parallel to the display surface in the front of the liquid crystal display in the process of transmitting to the infrared receiving array; the optical assembly is annularly disposed around the liquid crystal display; and one end of the optical assembly allocated for emitting the infrared ray detection grid is located in the front of the display surface of the liquid crystal display.

Description

Infrared touch screen using light distribution mirror

[0001] The present invention relates to the field of display touch, and more particularly to an infrared sensing touch display device using a light distribution mirror. Background technique

[0002] In the current touch screens appearing on the market, the infrared touch screen occupies a certain share. The two patent products disclosed in Patent No. 200720052423.3 and Patent No. 200720051069.2 are common infrared touch display devices, which mainly include flat plates. a display unit (including a liquid crystal display), four printed circuit boards and an outer frame welded around the flat display unit, wherein the infrared emitting tube and the infrared receiving tube are disposed in the The front side of the display panel is displayed, and the infrared emitting tube and the infrared receiving tube are respectively disposed on the left and right sides and the upper and lower sides of the flat display member, so that an infrared light is formed on the front side of the display of the flat display member. Grating detection network. When the user touches a point on the display surface of the flat display member with a finger or other object, the two infrared rays passing through the position are blocked, so that the infrared receiving tube cannot receive the infrared emitting tube corresponding thereto. Infrared, the control system of the infrared touch display device can instantly calculate the position of the contact, and then run the corresponding program according to the command corresponding to the contact position, thereby realizing the touch operation on the flat display part.

[0003] A disadvantage of the infrared touch panel of the above structure is that: a printed circuit board for connecting an infrared emitting tube and an infrared receiving tube is embedded around the flat display member, and the printed circuit board is identical to the flat display member In a planar arrangement, when the outer frame of the flat display component is packaged, the outer frame needs to package the printed circuit board, thereby causing the outer frame size of the flat display component to be correspondingly larger, thereby enabling infrared The touch display device is very heavy, resulting in a large volume and high cost of the entire infrared touch screen.

[0004] With the continuous development of the society, liquid crystal displays are currently developing in an ultra-thin and ultra-narrow direction. According to the conventional infrared touch screen, a frame is generally required to be twenty millimeters wide, which is mainly limited to the connection of the above infrared rays. The arrangement width of the printed circuit board of the transmitting tube and the infrared receiving tube. As a result, many ultra-thin, ultra-narrow displays have difficulty in using infrared touch technology. The above is the main technical defect of the conventional infrared touch display device in the specific implementation, which is the main problem to be solved by the present invention.

Summary of the invention

[0005] An object of the present invention is to provide an infrared touch screen using a light distribution mirror, which is a product of the same nature as a conventional touch display device, and the main technical problems to be solved are: traditional infrared touch The control display device is limited to the emission of the infrared emission tube and the infrared receiving tube, and the receiving end needs to be disposed on the front side of the display of the flat panel display component, so the circuit board for connecting the infrared emission tube and the infrared receiving tube needs to be embedded in the flat panel. Show the perimeter of the part, The frame of the entire infrared touch display device is thick and heavy, and is difficult to apply to a small touch device. The above is the main technical problem to be solved by the present invention.

[0006] In order to solve the above technical problem, the technical solution adopted by the present invention is: The present invention provides an infrared touch screen using a light distribution mirror, which comprises a liquid crystal display and an infrared transceiver module, wherein the infrared transceiver module The invention comprises an infrared emitting array composed of a plurality of infrared transmitting tubes, an infrared receiving array composed of a plurality of infrared receiving tubes, and a printed circuit board. The infrared emitting array and the infrared receiving array are both soldered on the printed circuit board, and are characterized by: The infrared emitting array and the infrared receiving array are both located at a rear side of the display surface of the liquid crystal display, and a transmitting end of the infrared emitting array and a receiving end of the infrared receiving array are disposed to enable the infrared emitting array to emit In the process of transmitting the infrared ray to the infrared receiving array, an optical component of the infrared ray detecting net parallel to the display surface is formed on the front side of the liquid crystal display, and the optical component ring is disposed around the liquid crystal display, and One end of the optical component of the optical infrared detection network is located in the liquid The front side of the monitor display.

Preferably, the liquid crystal display is further provided with a touch panel, the touch panel is disposed on a display surface side of the liquid crystal display, and the touch panel is made of a transparent tempered glass plate.

Preferably, the infrared emitting array and the infrared receiving array are both disposed on a side of the liquid crystal display with respect to the touch panel.

[0009] Preferably, the printed circuit board is parallel to the liquid crystal display, and the infrared emitting array and the infrared receiving array are respectively disposed on the left and right sides and the upper and lower sides of the liquid crystal display, and are located in the liquid crystal The infrared light emitted by the infrared emitting array and the infrared light received by the infrared receiving array are perpendicular to the printed circuit board, and the optical component includes a first mirror and a second mirror. a mirror surface of the first mirror and the second mirror respectively corresponding to a transmitting end of the infrared emitting array and a receiving end of the infrared receiving array, wherein the mirrors of the first mirror and the second mirror are respectively located The display front side of the liquid crystal display corresponds to each other, and the mirror surfaces of the first mirror and the second mirror are at an angle of 45 degrees with the display surface of the liquid crystal display, and the infrared light emitted by the infrared emission array is Irradiation at a 45 degree angle on the mirror surface of the first mirror, through the first mirror and the liquid Displaying the display surface parallel to the mirror surface of the second mirror, and then passing the second mirror to the receiving end of the infrared receiving array, where the front side of the liquid crystal display is located at the first mirror and the first An infrared ray detecting net parallel to the display surface is formed between the mirror surfaces of the two mirrors.

[0010] Preferably, the printed circuit board is parallel to the liquid crystal display, and the infrared emission array and the infrared receiving array are respectively disposed on the left and right sides and the upper and lower sides of the liquid crystal display, and are located in the liquid crystal The infrared light emitted by the infrared emitting array and the infrared light received by the infrared receiving array are parallel to the printed circuit board, and the optical component includes a first mirror, a second mirror, and a rear side of the display surface of the display. Third mirror and a fourth mirror, wherein a first mirror is disposed in front of a transmitting end of the infrared emitting array, a mirror surface corresponding to a transmitting end of the infrared emitting array, and the second mirror and the third mirror respectively Located on opposite sides of the display front side of the liquid crystal display, and the second mirror corresponds to a mirror surface of the first mirror, the third mirror corresponds to a mirror surface of the second mirror, the fourth The mirror surface of the mirror corresponds to the third mirror, the fourth mirror is disposed in front of the receiving end of the infrared receiving array, and the mirror surface corresponds to the transmitting end of the infrared receiving array, the first mirror, the first The mirrors of the second mirror, the third mirror, and the fourth mirror are each at an angle of 45 degrees to the display surface of the liquid crystal display, and the infrared light emitted by the infrared emitting array is irradiated at a 45-degree angle. Reflecting on the mirror surface of a mirror, the second mirror is incident on the mirror surface of the third mirror parallel to the display surface of the liquid crystal display by the second mirror Reflected by the third mirror to the mirror surface of the fourth mirror, and finally reflected by the fourth mirror to the receiving end of the infrared receiving array, between the infrared emitting array and the infrared receiving array Infrared light forms an infrared ray detecting net parallel to the display surface between the second mirror and the mirror surface of the third mirror on the front side of the liquid crystal display.

[0011] Preferably, the first mirror and the second mirror are both disposed on the touch panel with respect to the other side of the liquid crystal display, that is, the touch surface, the first mirror and the second mirror An infrared ray detecting net formed between the mirror surfaces of the mirror is located on the front side of the touch and is parallel to the touch surface.

[0012] Preferably, the second mirror and the third mirror are both disposed on the touch panel with respect to the other side of the liquid crystal display, that is, the touch surface, the second mirror and the third An infrared ray detecting net formed between the mirror surfaces of the mirror is located on the front side of the touch and is parallel to the touch surface.

[0013] Compared with the prior art, the technical effect of the present patent application is: The present invention provides an infrared touch screen using a light distribution mirror, which is disposed on the display surface of the liquid crystal display by using the optical component The infrared light emitted by the infrared emitting array of the side is incident on the front side of the liquid crystal display to form an infrared light detecting net parallel to the display surface, and then is incident to the infrared receiving end which is also disposed on the rear side of the display surface of the liquid crystal display. The receiving end of the array, therefore, the width of the frame of the infrared touch display screen only needs to be able to receive the optical component, thereby greatly reducing the width of the frame, and the frame of the touch display device is narrowed.

DRAWINGS

1 is a schematic structural view of a preferred embodiment of the present invention.

2 is a schematic structural view of another preferred embodiment of the present invention.

detailed description

[0016] Hereinafter, an infrared touch panel using a light distribution mirror proposed by the present invention will be described in more detail with reference to FIGS. 1 to 2 and preferred embodiments. [0017] The present invention provides an infrared touch screen using a light distribution mirror, which includes a liquid crystal display 10 and an infrared transceiver module 20, wherein the infrared transceiver module 20 includes an infrared emission array composed of a plurality of infrared emission tubes. An infrared receiving array 22 composed of a plurality of infrared receiving tubes and a printed circuit board 23, wherein the infrared emitting array 21 and the infrared receiving array 22 are soldered to the printed circuit board 23, wherein: the infrared emitting array 21 and the infrared receiving array 22 are both located at the rear side of the display surface of the liquid crystal display 10. The transmitting end of the infrared emitting array 21 and the receiving end of the infrared receiving array 22 are disposed to enable the infrared emitting array 21 to emit In the process of being transmitted to the infrared receiving array 22, an optical component 30 of an infrared light detecting net parallel to the display surface is formed on the front side of the liquid crystal display 10, and the optical component 30 is disposed on the liquid crystal display. Around the periphery of 10, and one end of the optical component 30 that is coupled to the infrared light detecting net is located in front of the display of the liquid crystal display 10. side.

[0018] In the specific implementation, the infrared light emitted by the infrared emitting array 21 disposed on the rear side of the display surface of the liquid crystal display 10 is distributed to the front side of the liquid crystal display 10 by the optical component 30. An infrared light detecting net parallel to the display surface is then incident on the receiving end of the infrared receiving array 22 also disposed on the rear side of the display surface of the liquid crystal display 10, so that the width of the border of the infrared touch display screen only needs to be able to The optical component 30 can be disposed, and the width of the frame is greatly reduced, so that the frame of the touch display device is narrowed.

The optical component 30 is composed of a mirror. In the specific embodiment, the infrared light emitted by the infrared emitting array 21 is matched by the mirror.

[0020] A preferred embodiment of the present invention is as follows: the printed circuit board 23 is parallel to the liquid crystal display 10, and the infrared emitting array 21 and the infrared receiving array 22 are respectively disposed corresponding to each other in the liquid crystal. The left and right sides of the display 10 and the upper and lower sides are located on the rear side of the display surface of the liquid crystal display 10. The infrared light emitted by the infrared emitting array 21 and the infrared light received by the infrared receiving array 22 are perpendicular to the printing. a circuit board 23, the optical component 30 includes a first mirror 31 and a second mirror 32. The mirrors of the first mirror 31 and the second mirror 32 respectively correspond to the transmitting ends of the infrared emitting array 21. And the receiving end of the infrared receiving array 22, wherein the mirrors of the first mirror 31 and the second mirror 32 respectively correspond to the front side of the display of the liquid crystal display 10, the first mirror 31 and the second reflection The mirrors of the mirror 32 are at an angle of 45 degrees to the display surface of the liquid crystal display 10, and the infrared light emitted by the infrared emitting array 21 is 45. The illumination of the angle is incident on the mirror surface of the first mirror 31, and the projection of the first mirror 31 is parallel to the display surface of the liquid crystal display 10 to the mirror surface of the second mirror 32, and then passes through The second mirror 32 is disposed at the receiving end of the infrared receiving array 22, and the front side of the liquid crystal display 10 is located between the first mirror 31 and the mirror surface of the second mirror 32 to form a parallel with the display surface. Infrared light detection network.

[0021] A preferred embodiment as shown in FIG. 2: the printed circuit board 23 is parallel to the liquid crystal display 10, The infrared emitting array 21 and the infrared receiving array 22 are respectively disposed on the left and right sides and the upper and lower sides of the liquid crystal display 10, and are located on the rear side of the display surface of the liquid crystal display 10, and the infrared emitting array 21 emits The infrared light and the infrared light received by the infrared receiving array 22 are both parallel to the printed circuit board 23. The optical component 30 includes a first mirror 31a, a second mirror 32a, a third mirror 33a, and a fourth reflection. The mirror 34a, wherein the first mirror 31a is disposed in front of the transmitting end of the infrared emitting array 21, the mirror surface corresponding to the transmitting end of the infrared emitting array 21, the second mirror 32a and the third The mirrors 33a are respectively located on opposite sides of the display front side of the liquid crystal display 10, and the second mirror 32a corresponds to the mirror surface of the first mirror 31a, and the third mirror 33a and the second mirror 32a Corresponding to the mirror surface, the mirror surface of the fourth mirror 34a corresponds to the third mirror 33a, and the fourth mirror 34a is disposed at the infrared receiving array 22. In front of the end, the mirror surface corresponds to the transmitting end of the infrared receiving array 22, and the mirror surfaces of the first mirror 31a, the second mirror 32a, the third mirror 33a and the fourth mirror 34a are connected to the liquid crystal display 10 The display surface of the infrared ray array 21 is irradiated on the mirror surface of the first mirror 31a at an angle of 45 degrees, and is reflected to the second mirror 32a. The second mirror 32a is incident on the mirror surface of the third mirror 33a in parallel with the display surface of the liquid crystal display 10, and is reflected by the third mirror 33a to the mirror surface of the fourth mirror 34a. And finally reflected by the fourth mirror 34a to the receiving end of the infrared receiving array 22, the infrared light between the infrared emitting array 21 and the infrared receiving array 22 is located at the front side of the liquid crystal display 10 An infrared ray detecting net parallel to the display surface is formed between the second mirror 32a and the mirror surface of the third mirror 33a.

[0022] Preferred Embodiments: As shown in FIG. 1 and FIG. 2, the liquid crystal display 10 is further provided with a touch panel 11, and the touch panel 11 is disposed on a display surface side of the liquid crystal display 10, The touch panel 11 is made of a transparent tempered glass plate, and the liquid crystal display 10 is protected against external force by means of a touch panel 11 made of a transparent tempered glass plate.

[0023] Preferred Embodiments: As shown in FIG. 1 and FIG. 2, the infrared emission array 21 and the infrared receiving array 22 are both disposed on one side of the liquid crystal display 10 with respect to the touch panel 11, by using transparent The touch panel 11 made of a tempered glass plate provides external force protection for the infrared emitting array 21 and the infrared receiving array 22.

[0024] Preferred embodiment: As shown in FIG. 1, the first mirror 31 and the second mirror 32 are disposed on the touch panel 11 opposite to the other side of the liquid crystal display 10, that is, touch On the surface, an infrared ray detecting net formed between the first mirror 31 and the mirror surface of the second mirror 32 is located on the front side of the touch and parallel to the touch surface.

[0025] Preferred embodiment: As shown in FIG. 2, the second mirror 31a and the third mirror 32a are respectively disposed on the touch panel 11 opposite to the other side of the liquid crystal display 10, that is, touch On the surface, an infrared ray detecting net formed between the second mirror 31a and the mirror surface of the third mirror 32a is located on the front side of the touch and parallel to the touch surface. [0026] In summary, the technical solution of the present invention can fully and effectively accomplish the above object, and the structural principle and functional principle of the present invention have been fully verified in the embodiment, and the expected efficacy and purpose can be achieved. The embodiments of the present invention can also be modified according to these principles, and therefore, the present invention includes all alternatives within the scope of the claims. Any equivalent changes made within the scope of the patent application of the present invention are within the scope of the patent application of the present application.

Claims

An infrared touch screen comprising a light distribution mirror, comprising: a liquid crystal display and an infrared transceiver module, wherein the infrared transceiver module comprises an infrared emission array composed of a plurality of infrared emission tubes, and is composed of a plurality of infrared receiving tubes An infrared receiving array and a printed circuit board, wherein the infrared emitting array and the infrared receiving array are soldered on the printed circuit board, wherein: the infrared emitting array and the infrared receiving array are both located on a display surface of the liquid crystal display a rear side, a transmitting end of the infrared emitting array and a receiving end of the infrared receiving array are disposed to enable infrared rays emitted by the infrared emitting array to be transmitted to the infrared receiving array in front of the liquid crystal display Forming an optical component of the infrared ray detecting net parallel to the display surface, the optical component ring is disposed around the liquid crystal display, and the optical component is coupled to the display of the liquid crystal display Front side.

The infrared touch screen using the light distribution mirror according to any one of the preceding claims, wherein: the liquid crystal display is further provided with a touch panel, and the touch panel is disposed on the liquid crystal On the display surface side of the display, the touch panel is made of a transparent tempered glass plate.

3. The infrared touch screen using a light distribution mirror according to claim 2, wherein: the infrared light emitting array and the infrared receiving array are both disposed on the liquid crystal display with respect to the touch panel side.

4. The infrared touch screen using a light distribution mirror according to claim 3, wherein: the printed circuit board is parallel to the liquid crystal display, and the infrared emission array and the infrared receiving array respectively correspond to each other. Arranging on the left and right sides and the upper and lower sides of the liquid crystal display, and located at the rear side of the display surface of the liquid crystal display, the infrared light emitted by the infrared emitting array and the infrared light received by the infrared receiving array are perpendicular to the a printed circuit board, the optical component includes a first mirror and a second mirror, and the mirrors of the first mirror and the second mirror respectively correspond to the transmitting end of the infrared emitting array and the receiving of the infrared receiving array And the mirror surfaces of the first mirror and the second mirror respectively correspond to the front side of the display of the liquid crystal display, and the mirror surfaces of the first mirror and the second mirror are respectively displayed with the liquid crystal display The angle between the faces is 45 degrees, and the infrared light emitted by the infrared emitting array is irradiated at a 45 degree angle at the first a mirror surface of the mirror, the projection of the first mirror is parallel to the display surface of the liquid crystal display, and is incident on the mirror surface of the second mirror, and then is distributed to the infrared receiving array through the second mirror. The receiving end forms an infrared ray detecting net parallel to the display surface between the first mirror and the mirror surface of the second mirror on the front side of the liquid crystal display.

5. The infrared touch screen using a light distribution mirror according to claim 3, wherein: the printed circuit board is parallel to the liquid crystal display, and the infrared emission array and the infrared receiving array respectively correspond to each other. The infrared rays emitted by the infrared emitting array and the infrared rays received by the infrared receiving array are parallel to the left and right sides and the upper and lower sides of the liquid crystal display, and located at the rear side of the display surface of the liquid crystal display. a printed circuit board, the optical component includes a first mirror, a second mirror, a third mirror, and a fourth mirror, wherein the first mirror is disposed at the In front of the transmitting end of the infrared emitting array, the mirror surface corresponds to the transmitting end of the infrared emitting array, and the second mirror and the third mirror are respectively located on opposite sides of the front side of the display of the liquid crystal display. And the second mirror corresponds to a mirror surface of the first mirror, the third mirror corresponds to a mirror surface of the second mirror, and the mirror surface of the fourth mirror corresponds to the third mirror, The fourth mirror is disposed in front of the receiving end of the infrared receiving array, and the mirror surface corresponds to the transmitting end of the infrared receiving array, the first mirror, the second mirror, the third mirror and the fourth mirror The mirrors are at an angle of 45 degrees to the display surface of the liquid crystal display, and the infrared light emitted by the infrared emitting array is irradiated on the mirror surface of the first mirror at a 45-degree angle, and is reflected to the second a mirror, which is incident on the mirror surface of the third mirror parallel to the display surface of the liquid crystal display by the second mirror, and then reflected by the third mirror to the fourth counter The mirror surface of the mirror is finally reflected by the fourth mirror to the receiving end of the infrared receiving array, and the infrared light between the infrared emitting array and the infrared receiving array is located at the front side of the liquid crystal display An infrared ray detecting net parallel to the display surface is formed between the mirror and the mirror surface of the third mirror.

The infrared touch screen adopting a light distribution mirror according to claim 4, wherein: the first mirror and the second mirror are both disposed on the touch panel with respect to the liquid crystal display On the other side, that is, on the touch surface, an infrared ray detecting net formed between the first mirror and the mirror surface of the second mirror is located on the front side of the touch and parallel to the touch surface.

7. The infrared touch screen using a light distribution mirror according to claim 5, wherein: the second mirror and the third mirror are both disposed on the touch panel relative to the liquid crystal display On the other side, that is, on the touch surface, an infrared ray detecting net formed between the second mirror and the mirror surface of the third mirror is located on the front side of the touch and parallel to the touch surface.