WO2014082365A1

WO2014082365A1 - Infrared touchscreen

Info

Publication number: WO2014082365A1
Application number: PCT/CN2012/087789
Authority: WO
Inventors: 尚晓东; 吴羊群; 刘新斌
Original assignee: 北京汇冠新技术股份有限公司
Priority date: 2012-11-30
Filing date: 2012-12-28
Publication date: 2014-06-05
Also published as: HK1175647A2; CN203012682U; TWM464744U

Abstract

The present utility model provides an infrared touchscreen. The infrared touchscreen comprises a touch panel (105), an infrared transceiver element (101), and a circuit board (103). Another electronic element (104) is disposed on the circuit board (103). The present utility model is characterized in that the infrared touchscreen further comprises a backing plate (107). The backing plate (107) is disposed at the same side of the circuit board (103), and is fixedly connected to the circuit board (103). The infrared transceiver element (101) is disposed on the backing plate (107) and is electrically connected to the circuit board (103). An optical axis of the infrared transceiver element (101) is higher than a plane the touch panel (105) is located on. According to the infrared touchscreen in the present utility model, the width of a frame is smallest, a certain buffer can be formed near the frame; therefore, a touch operation can be better performed near the frame, thereby greatly improving the touch experience of a user.

Description

Technical field

The utility model relates to an infrared touch screen. Background technique

Infrared touch screens are widely used in various environments due to their stable operation and long service life.

At present, an infrared touch screen is generally a touch panel mounted on the front of the display and a bezel containing a circuit board, such as a glass, and can be used to cover the display, and the frame surrounds the outside of the touch panel. An infrared transmitting tube and an infrared receiving tube are arranged on four sides of the circuit board in the frame. Generally, the infrared emitting tube and the infrared receiving tube are disposed on opposite sides of the frame, thereby forming on the touch panel surrounded by the frame. Crossed infrared matrix. When the user touches the touch panel of the infrared touch 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.

With the development of touch screens and the increasing user demand, users are demanding a better touch experience while requiring the touch screen to be thinner and narrower. Many touch screens nowadays not only recognize the position of touch points to achieve basic operations such as clicking, but also perform trajectory tracking of touch points for gesture recognition. The gesture in the area near the border of the touch screen is often very important. For example, sliding the finger outside the border near the border can perform a page turning operation to the left or right, which requires the border of the touch screen to be flat and has a certain buffer near the border. Zone" to better perform touch operations near the border and to meet the user's needs for the touch experience.

For the field of infrared touch screens, it has become a new trend to achieve both this real touch experience and the narrow requirements of touch screens. Utility model content

In view of the above problems existing in the prior art, the present invention provides an infrared touch screen capable of achieving ultra-narrow and flat touch screen borders while satisfying a high touch experience requirement. The utility model provides an infrared touch screen, which comprises a touch panel, an infrared transceiver component and a circuit board, wherein the circuit board is provided with other electronic components, wherein the infrared touch screen further comprises a pad, the pad The touch panel is disposed on a same side of the circuit board and is fixedly connected to the circuit board, and the infrared transceiver component is disposed on the pad and electrically connected to the circuit board, the infrared transceiver component The optical axis is higher than the plane in which the touch panel is located.

Preferably, the backing plate is a printed circuit board, and the infrared transceiver component is electrically connected to the circuit board through a conductor on the pad.

Preferably, the infrared touch screen further comprises a filter element, the filter element being located in a direction in which the infrared transceiver element faces.

Preferably, the filter element is located on the touch panel.

Preferably, the filter element is located between the pad and the touch panel.

Preferably, the filter element is a filter frame disposed around a periphery of the touch panel, the filter frame has a protrusion and a body, and the protrusion is located between the pad and the touch panel. The body is overlapped on the touch panel.

Preferably, the body of the filter frame is also overlapped on the pad.

Preferably, the other electronic component is located on the same side of the circuit board as the touch panel.

Preferably, the edge of the touch panel is provided with a recess for accommodating the other electronic component.

Preferably, the other electronic component is located on a different side of the circuit board from the touch panel.

Preferably, the infrared transceiver component comprises an infrared emitting component and an infrared receiving component, and at least two infrared emitting components on the same side of the infrared emitting component face in different directions.

Preferably, the backing plate comprises a first pad, a second pad and a third pad which are connected end to end. a plate and a fourth pad, the infrared emitting element is located on the first pad and/or the third pad, and the infrared receiving component is located on the second pad and/or the fourth pad At least two of the infrared emitting elements on the first pad and/or the third pad are oriented in different directions.

By using the infrared touch screen provided by the utility model, the circuit board is placed under the touch panel, and only the infrared transceiver component is disposed along the outer side of the touch panel, and the infrared transceiver component is raised by the pad, so that the frame of the touch screen is flat and The width is the smallest, and a certain "buffer" can be formed near the border to better perform the touch operation near the border, which greatly enhances the user's touch experience.

DRAWINGS

Figure 1 shows the structure of a novel infrared touch screen according to this:

Fig. 2 shows a side view of a frame according to the present invention using a novel infrared touch screen; Fig. 3 shows a partial enlarged view of the side frame of Fig. 2 according to the present invention;

Figure 4 shows a partial enlarged view of the side frame shown in Figure 2 in accordance with the present invention;

Fig. 5 shows a partial enlarged view of the side frame shown in Fig. 2 according to the present invention with a novel third embodiment.

detailed description

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the 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 An embodiment. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention.

Figure 1 shows an infrared touch screen in accordance with the present invention. Referring to FIG. 1, in order to better perform gesture recognition in the vicinity of the border of the touch screen, for example, outside the border to the border The sliding finger can perform a page turning operation to the left or right. The touch panel 105 of the touch screen according to the present invention has a certain buffer 106 at a position close to the frame. The buffer 106 can perform touch detection, but the display does not. The touch information in the buffer 106 is displayed to better perform a touch operation near the border. Thus, by setting the buffer 106, the user's touch experience can be improved.

2 shows a side view of a bezel of an infrared touch screen according to the present invention; FIG. 3 shows a partial enlarged view of the bezel shown in FIG. 2 according to a first embodiment of the present invention; A partially enlarged view of the bezel shown in FIG. 2 in accordance with a second embodiment of the present invention; FIG. 5 illustrates a partial enlargement of the bezel shown in FIG. 2 in accordance with a third embodiment of the present invention. Figure.

For the infrared touch screen of FIG. 1 , in order to realize an ultra-narrow bezel touch screen, the present invention provides an infrared touch screen. Referring to FIG. 1 to FIG. 3 , the infrared touch screen includes a touch panel 105 , an infrared transceiver component 101 , and a circuit board 103 . The circuit board 103 is provided with other electronic components 104. The infrared touch screen further includes a backing plate 107. The backing plate 107 and the touch panel 105 are disposed on the same side of the circuit board 103, and the backing plate 107 The periphery of the touch panel 105 is disposed and fixedly connected to the circuit board 103. The infrared transceiver component 101 is disposed on the pad 107 and electrically connected to the circuit board 103. The light of the infrared transceiver component 101 The axis is higher than the plane in which the touch panel 105 is located.

The infrared transceiving element 101 in this embodiment may be a chip component or an in-line component having a pin, such as a patch type infrared emitting tube and an in-line type infrared transmitting tube. The infrared transceiver element 101 includes an infrared emitting element and an infrared receiving element.

The infrared touch screen of the present invention utilizes the area of the buffer 106 to place the circuit board below the buffer 106. The infrared transceiving element 101 is fixed to the outside of the touch panel 105 by providing a pad 107. The circuit board 103 can be disposed around the touch panel 105, and can be composed of four circuit boards that are connected end to end to form a rectangular frame, or can be a rectangular integrated structure. The pad 107 may be fixedly coupled to the circuit board 103 by bonding, soldering, or screwing. Here, in the embodiment shown in FIG. 3, the pad 107 is fixedly connected to the circuit board 103 by screws 108. In the embodiment shown in FIG. 4, the pad 107 The solder is fixedly connected to the circuit board 103 by soldering using the pad 107 and the solder pads on the circuit board 103. The pad 107 may be a printed circuit board material. The infrared transceiver component 101 can be electrically connected to the circuit board 103 through a conductor on the pad 107, or can be directly connected to the circuit board 103 through a pin. At this time, the pad 107 mainly serves as a support and a fixed. When the infrared transceiver component 101 is an in-line component having a pin, the pin of the infrared transceiver component 101 can be inserted into the through hole of the circuit board through the through hole in the pad 107, and then the pin is soldered to the circuit board. When the infrared transceiver component 101 is a chip component, it can be soldered to the pad 107 to be electrically connected to the conductor on the pad 107. The conductor is connected to the corresponding position on the circuit board 103. It can be understood that various circuit connections are available. The way to fix the pad can be applied flexibly. In order to enable touch detection, the pad 107 needs to be high enough so that the optical axis of the infrared transceiver element 101 is higher than the horizontal plane of the touch panel 105, so that the emitted infrared rays are above the plane of the touch panel 105 to be at the touch panel 105. A scanning optical network is formed above. When the user touches on the touch panel 105, a touch object such as a finger blocks the infrared rays passing through the position, thereby judging the position of the touched point on the touch panel 105. The touch panel 105 can be fixed to the display, and the touch panel 105 can be glass or other transparent materials that can be used for the touch screen.

The pad 107 may preferably be a printed circuit board, and the infrared transceiver component 101 is electrically connected to the circuit board 103 by being plugged or soldered on the printed circuit board.

Preferably, the infrared touch screen further includes a filter element 102, and the filter element 102 is located in a direction facing the infrared transceiver element 101 for filtering other light than the infrared light, thereby avoiding ambient light, etc. Interference with infrared light.

The filter element 102 may be fixedly disposed on the circuit board 103 and located between the pad 107 and the touch panel 105. The filter element 102 can be fixed to the circuit board 103, for example, by bonding or screwing, and the filter element 102 can also be fixed to the surface of the touch panel 105.

Further preferably, the filter element 107 may be a filter frame disposed around a periphery of the touch panel 105, the filter frame has a body 1022 and a protrusion 1021, and the protrusion 1021 is located on the pad 107. Between the touch panel 105 and the body 1022 A portion of the body is overlapped on the touch panel 105. The body 1022 is used to fix the touch panel 105 in addition to filtering. Since the protruding portion 1021 of the filter frame is fixed on the circuit board 103, and the body 1022 can press the touch panel 105 to fix the touch panel 105 on the circuit board 103, the touch panel 105 can be prevented from slipping off the circuit board 103. Or, conversely, the circuit board 103 can be prevented from slipping off the touch panel 105. The protruding portion 1021 and the body 1022 may be integrally formed, or may be fixedly connected by bonding or the like.

The body of the filter frame 1022 may also have a portion overlapped on the pad 107 to enable the pad 107 to be fixedly more stable.

As shown in FIG. 5, the other electronic component 104 may be located on the same side of the circuit board 103 as the touch panel 105. Preferably, a groove may be disposed at the edge of the touch panel for accommodating the other. The electronic component 104 is thus thinner overall. The other electronic components 104 may also be located on a different side of the circuit board from the touch panel, as shown in Figures 3 and 4.

Preferably, the backing plate 107 may include a first backing plate, a second backing plate, a third backing plate and a fourth backing plate, which are connected end to end, and the infrared emitting element is located at the first backing plate and/or the Said third pad, said infrared receiving element being located on said second pad and / or said fourth pad, said said first pad and / or said third pad At least two of the infrared emitting elements of the infrared emitting element face in different directions. Generally, the infrared emitting element on the first pad and/or the third pad may be divided into a plurality of infrared emitting element groups, and the infrared emitting elements 101 in each infrared emitting element group are continuously disposed, and each group contains a direction. Infrared emitting elements installed in at least two different directions can provide more oblique light, which makes it easier to eliminate ghost points, especially for multi-touch.

Referring again to FIG. 1, since the position of the touch panel 105 near the bezel has a certain buffer 106, the buffer 106 can perform touch detection, but the touch information in the buffer 106 is not displayed on the display. Thereby, the display area of the touch panel 105 can be smaller than the effective touch area of the touch panel 105, so that the touch operation near the border can be better performed, and the touch experience of the user is improved. As shown in FIG. 1, the effective touch of the touch panel 105 The area may include a display area in the middle of the touch panel and two areas of the buffer 106 outside the display area. The buffer area 106 outside the display area and display area can be distinguished by overlaying an opaque silk screen (e.g., black silk screen) on the location of the buffer 106 on the touch panel 105.

By using the infrared touch screen provided by the utility model, since the circuit board is placed under the touch panel, only the infrared transceiver component is disposed along the outer side of the touch panel, and the infrared transceiver component is raised by the pad, so that the border of the touch screen is flat. The width is the smallest, and a certain "buffer" can be formed near the border to better perform the touch operation near the border, which greatly enhances the user's touch experience.

The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can easily think of changes within the technical scope disclosed by the present invention. Or replacements should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Claim

An infrared touch screen, comprising: a touch panel (105), an infrared transceiver component (101) and a circuit board (103), wherein the circuit board (103) is provided with other electronic components (104), the characteristics thereof The infrared touch screen further includes a backing plate (107), the backing plate (107) and the touch panel (105) are disposed on the same side of the circuit board (103), and the circuit board (103) a fixed connection, the infrared transceiver component (101) is disposed on the backplane (107) and electrically connected to the circuit board (103), and an optical axis of the infrared transceiver component (101) is higher than the touch panel (105) The plane in which it is located.

2. An infrared touch screen according to claim 1, wherein said backing plate (107) is a printed circuit board (103), said infrared transmitting and receiving element (101) passing through a conductor on said backing plate (107) The circuit board (103) is electrically connected.

The infrared touch panel according to claim 1, characterized in that the infrared touch screen further comprises a filter element (102), the filter element (102) being located in a direction in which the infrared transceiver element (101) faces.

4. Infrared touch screen according to claim 3, characterized in that the filter element (102) is located on the touch panel (105).

The infrared touch screen according to claim 3, wherein the filter element (102) is located between the pad (107) and the touch panel (105).

The infrared touch screen according to claim 5, wherein the filter element (102) is a filter frame disposed around a periphery of the touch panel (105), and the filter frame has a protrusion ( 1021) and a body (1022), the protrusion (1021) is located between the pad (107) and the touch panel (105), and the body (1022) is overlapped on the touch panel (105) on.

7. The infrared touch screen according to claim 6, wherein the body (1022) of the filter frame is also overlapped on the backing plate (107).

The infrared touch screen according to claim 1, wherein the other electronic component (104) is located on the same side of the circuit board (103) as the touch panel (105).

The infrared touch screen according to claim 8, characterized in that the edge of the touch panel (105) is provided with a recess for accommodating the other electronic component (104).

10. The infrared touch screen of claim 1, wherein the other electronic component (104) is located on a different side of the circuit board (103) from the touch panel (105).

The infrared touch screen according to any one of claims 1 to 10, wherein the infrared transceiver component (101) comprises an infrared emitting component and an infrared receiving component, and the infrared emitting component is located on the same side At least two of the infrared emitting elements face in different directions.

The infrared touch screen according to claim 11, wherein the backing plate (107) comprises a first backing plate, a second backing plate, a third backing plate and a fourth backing plate, which are connected end to end, An infrared emitting element is located on the first pad and/or the third pad, and the infrared receiving component is located on the second pad and/or the fourth pad, and is located on the first pad At least two of the infrared emitting elements of the plate and/or the third pad on the third pad face in different directions.