Touch display device

Abstract

The present application provides a touch display device, which relates to the field of display technology and is used to solve the technical problem of inaccurate touch positioning. The touch display device includes at least two infrared touch screens spliced ​​together, and two opposite edges of each infrared touch screen are respectively provided with an infrared transmitter and an infrared receiver, and the infrared receiver is configured to receive only infrared rays emitted by the infrared transmitter of the same infrared touch screen, so that the infrared receiver will not receive infrared rays emitted by the infrared transmitters of other infrared touch screens, thereby avoiding cross-screen reception of infrared rays and improving the accuracy of touch positioning.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a touch display device. Background Art

[0002] With the continuous development of touch technology, there are more and more touch modes. Among them, infrared touch is widely used because it is not affected by current, voltage and static electricity. The edge of the infrared touch screen is equipped with an infrared transmitter and an infrared receiver. The infrared transmitter and the infrared receiver are arranged in pairs. The infrared rays emitted by the infrared transmitter form an infrared detection network above the screen. When a touch operation is performed on the infrared touch screen, the specific position of the touch can be determined according to the infrared rays received by the infrared receiver. However, when two infrared touch screens are spliced ​​together for display, there is a problem of inaccurate touch positioning. Summary of the invention

[0003] In view of the above problems, an embodiment of the present application provides a touch display device for improving the accuracy of touch positioning.

[0004] In order to achieve the above objectives, the present application provides the following technical solutions:

[0005] An embodiment of the present application provides a touch display device, which includes at least two infrared touch screens spliced ​​together, and an infrared transmitter and an infrared receiver are respectively provided at two opposite edges of each infrared touch screen, and the infrared receiver is configured to only receive infrared rays emitted by the infrared transmitter of the same infrared touch screen.

[0006] The touch display device provided in the embodiment of the present application includes at least two infrared touch screens spliced ​​in sequence along a first direction, and an infrared transmitter and an infrared receiver are respectively provided at two opposite edges of each infrared touch screen. The infrared receiver is configured to receive only infrared rays emitted by the infrared transmitter of the same infrared touch screen, so that the infrared receiver will not receive infrared rays emitted by the infrared transmitters of other infrared touch screens, thereby avoiding cross-screen reception of infrared rays, thereby avoiding interference from other infrared touch screens and improving the accuracy of touch positioning.

[0007] In a possible implementation, at least two of the infrared touch screens are spliced ​​in sequence along a first direction; the infrared touch screen includes a first edge and a second edge that are arranged opposite to each other along the first direction and extend along a second direction perpendicular to the first direction, the first edge is provided with a plurality of the infrared transmitters, and the second edge is provided with a plurality of the infrared receivers.

[0008] In a possible implementation manner, an installation height of the infrared transmitter at the first edge is different from an installation height of the infrared receiver at the second edge.

[0009] In a possible implementation, in the same infrared touch screen, the installation heights of the multiple infrared transmitters on the first edge are the same, and the installation heights of the multiple infrared receivers on the second edge are the same; or, the installation heights of the multiple infrared transmitters on the first edge are at least partially different, and the installation heights of the multiple infrared receivers on the second edge are the same; or, the installation heights of the multiple infrared transmitters on the first edge are the same, and the installation heights of the multiple infrared receivers on the second edge are at least partially different.

[0010] In a possible implementation manner, the infrared transmitter on the first edge and the infrared receiver on the second edge are staggered along the second direction.

[0011] In a possible implementation, the second edge is further provided with a first aperture, and the first aperture is provided on a side of the infrared receiver facing the infrared transmitter, so that the infrared receiver receives infrared rays at a preset angle.

[0012] In a possible implementation manner, the first edge is further provided with a second aperture, and the second aperture is provided on a side of the infrared transmitter facing the infrared receiver to limit an angle of infrared rays emitted by the infrared transmitter.

[0013] In a possible implementation, a third edge and a fourth edge opposite to the third edge are arranged between the first edge and the second edge of each infrared touch screen; the third edge is provided with a plurality of the infrared transmitters, and the fourth edge is provided with a plurality of the infrared receivers, and the installation height of the plurality of the infrared transmitters at the third edge is the same as the installation height of the plurality of the infrared receivers at the fourth edge.

[0014] In a possible implementation, the plurality of infrared touch screens are arranged in M ​​rows and N columns, where M and N are both positive integers greater than 1; the infrared touch screen comprises a first edge and a second edge which are arranged opposite to each other along a first direction and extend along a second direction perpendicular to the first direction, and a third edge and a fourth edge which are arranged opposite to each other along the second direction and extend along the first direction, the first edge and the third edge are provided with a plurality of the infrared transmitters, and the second edge and the fourth edge are provided with a plurality of the infrared receivers; the installation height of the infrared transmitter at the first edge is different from the installation height of the infrared receiver at the second edge; the installation height of the infrared transmitter at the third edge is different from the installation height of the infrared receiver at the fourth edge.

[0015] In a possible implementation manner, the infrared transmitters and / or infrared receivers of different infrared touch screens are installed at different heights; or, the infrared transmitters and / or infrared receivers of different infrared touch screens are installed at different positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 is a schematic diagram of the structure of a touch display device in the related art;

[0018] Figure 2 A schematic diagram of the corresponding relationship between an infrared transmitter and an infrared receiver in one embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of the corresponding relationship between the infrared transmitter and the infrared receiver in another embodiment of the present application;

[0020] Figure 4 A side view of a touch display device provided in a preferred embodiment of the present application;

[0021] Figure 5 A three-dimensional diagram of a touch display device provided in a preferred embodiment of the present application;

[0022] Figure 6 A three-dimensional diagram of a touch display device provided in another preferred embodiment of the present application;

[0023] Figure 7 A top view of a touch display device provided in a preferred embodiment of the present application;

[0024] Figure 8 A side view of a first aperture provided in a preferred embodiment of the present application;

[0025] Fig. 9 A side view of a second aperture provided in another preferred embodiment of the present application;

[0026] Fig.10 A side view of a first aperture and a second aperture provided in another preferred embodiment of the present application;

[0027] Fig.11 A top view of a touch display device provided in another preferred embodiment of the present application;

[0028] Fig.12A side view of a touch display device provided in another preferred embodiment of the present application.

[0029] Description of reference numerals:

[0030] 10-Infrared touch screen;

[0031] 11 - first edge;

[0032] 12-second edge;

[0033] 13-third edge;

[0034] 14- fourth edge;

[0035] 20-Infrared transmitter;

[0036] 30- infrared receiver;

[0037] 40-first aperture;

[0038] 50 - Second aperture. DETAILED DESCRIPTION

[0039] As described in the background technology, there is a problem of inaccurate touch positioning when multiple infrared touch screens are spliced ​​together for display in the related technology. The inventors have found that the reason is that along the splicing direction of the multiple infrared touch screens, the infrared transmitter on one infrared touch screen emits infrared rays, and at least one infrared receiver on the infrared touch screen receives the infrared rays, and the touch positioning is determined by the infrared rays. When the infrared receivers on other infrared touch screens also receive the infrared rays, that is, the other infrared touch screens are interfered by the infrared rays, resulting in inaccurate touch positioning, which is prone to touch misoperation.

[0040] Specific reference Figure 1 The touch display device includes two infrared touch screens 10, which are spliced ​​left and right. In each infrared touch screen 10, an infrared transmitter 20 is arranged at the left edge and the upper edge of the infrared touch screen 10, and an infrared receiver 30 is arranged at the right edge and the lower edge of the infrared touch screen 10. The infrared transmitter 20 of the infrared touch screen 10 on the left emits infrared rays to the right.

[0041] For easy identification, the infrared light emitted by the infrared touch screen 10 on the left side is reflected on the part of the infrared touch screen 10. Figure 1 As shown by the solid line in the middle, the part that propagates to the infrared touch screen 10 on the right side is as shown in FIG. Figure 1Indicated by the dotted line in the middle. That is, the infrared rays emitted by the infrared transmitter 20 of the infrared touch screen 10 on the left are not only received by the infrared receiver 30 of the infrared touch screen 10 on the left, but may also be received by the infrared receiver 30 of the infrared touch screen 10 on the right, thereby affecting the accuracy of the touch positioning of the infrared touch screen 10 on the right. In the drawings of the embodiments of the present application, there are gaps between the infrared touch screens 10 to facilitate reference to the structure of the infrared touch screens 10. When the infrared touch screens 10 are spliced ​​into a touch display device, the infrared touch screens 10 are in contact with each other.

[0042] In response to the above technical problems, in the touch display device provided in the embodiment of the present application, the infrared receiver is configured to only receive infrared rays emitted by the infrared transmitter of the same infrared touch screen, so that the infrared receiver will not receive infrared rays emitted by the infrared transmitters of other infrared touch screens, thereby avoiding cross-screen reception of infrared rays, thereby avoiding interference from other infrared touch screens 10 and improving the accuracy of touch positioning.

[0043] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0044] refer to Figure 2 , an embodiment of the present application provides a touch display device, which includes at least two infrared touch screens 10 spliced ​​together. Exemplarily, the touch display device includes two, three or more infrared touch screens 10. Each of the at least two infrared touch screens 10 can be used separately when not spliced ​​together, and these infrared touch screens 10 form a whole when spliced ​​together, and perform touch display together. In a possible implementation, each infrared touch screen 10 can be provided with a connection port to achieve communication connection between multiple infrared touch screens 10.

[0045] The infrared transmitter 20 and the infrared receiver 30 are respectively disposed at two opposite edges of each infrared touch screen 10, that is, the infrared transmitter 20 and the infrared receiver 30 are disposed opposite to each other. Exemplarily, an outer frame is disposed at the edge of the infrared touch screen 10, and the outer frame has an opening, and the outer frame is installed with the above-mentioned infrared transmitter 20 and the infrared receiver 30. Exemplarily, the outer frame includes a plurality of frames, and these frames are sequentially connected end to end to form a closed ring to form an opening, and the opening corresponds to the infrared touch screen 10.

[0046] The infrared transmitter 20 is used to transmit infrared rays, and the infrared receiver 30 is used to receive the infrared rays emitted by the infrared transmitter 20. The infrared transmitter 20 may include an infrared light emitting diode (IR LED) or a laser diode (LD), and the infrared receiver 30 may include a charge coupled device (CCD) or a photoelectric position sensitive device (PSD).

[0047] like Figure 2 As shown, the infrared rays between the infrared transmitter 20 and the infrared receiver 30 form a crisscross infrared detection network above the infrared touch screen 10, that is, the orthographic projections of these infrared rays on the infrared touch screen 10 intersect. When a touch operation is performed, the intensity of the infrared rays received by the infrared receiver 30 will change, and the touch position can be determined according to the intensity of the infrared rays received by the infrared receiver 30.

[0048] Specifically, a data table is stored in the processor of the infrared touch screen 10, and the infrared transmitter 20 and the infrared receiver 30 corresponding to all the intersections are stored in the data table. When a touch operation is performed, when a touch object (such as a finger) contacts the infrared touch screen 10, at least two infrared rays are affected, and the infrared receiver 30 and the infrared transmitter 20 corresponding to each infrared ray are fixed. The processor locates the touch position from the data table according to the change of the infrared rays of the infrared receiver 30, that is, locates the actual position of the touch point on the infrared touch screen 10.

[0049] Some possible examples include Figure 2 As shown, an infrared transmitter 20 corresponds to an infrared receiver 30. Figure 2 As shown in the solid circle, the infrared receiver 30 is as shown in Figure 2 As shown in the hollow circle. Of the two opposite edges of the infrared touch screen 10, one edge is provided with a plurality of infrared transmitters 20, and the other edge is provided with a plurality of infrared transmitters 20, and the plurality of infrared receivers 30 correspond one to one with the plurality of infrared transmitters 20. Each infrared transmitter 20 emits a linear infrared light to form an infrared detection network.

[0050] In other possible examples, refer to Figure 3 , an infrared transmitter 20 and at least two infrared receivers 30, the infrared transmitter 20 is as follows Figure 3 As shown in the solid circle, the infrared receiver 30 is as shown in Figure 3As shown in the hollow circle. Of the two opposite edges of the infrared touch screen 10, one edge is provided with a plurality of infrared transmitters 20, and the other edge is provided with a plurality of infrared transmitters 20. One infrared transmitter 20 corresponds to two or more infrared receivers 30. Each infrared transmitter 20 emits fan-shaped infrared light to form an infrared detection network. Such an arrangement can reduce the number of infrared transmitters 20 and simplify the structure of the touch display device.

[0051] In order to further improve the accuracy of touch positioning, such as Figure 3 As shown, at least one infrared receiver 30 can receive infrared rays emitted by two or more infrared transmitters 20. With such an arrangement, more infrared transmitters 20 can be arranged on the infrared touch screen 10 of the same size, making the infrared rays in the infrared detection network denser, increasing the number of intersections of the infrared rays, and thus improving the accuracy of touch positioning.

[0052] The infrared receiver 30 in the embodiment of the present application is configured to receive only the infrared rays emitted by the infrared transmitter 20 of the same infrared touch screen 10. In this configuration, any infrared receiver 30 only receives the infrared rays of the infrared touch screen 10 where it is located, and does not receive the infrared rays of other infrared touch screens 10, thereby avoiding cross-screen reception of infrared rays, and further avoiding interference from other infrared touch screens 10, thereby improving the accuracy of touch positioning of the infrared touch screen 10.

[0053] In some possible embodiments, at least two infrared touch screens 10 are spliced ​​in sequence along a first direction, and each infrared touch screen 10 includes a first edge 11 and a second edge 12. The first edge 11 and the second edge 12 are arranged opposite to each other and extend along a second direction. The first direction is perpendicular to the second direction. The first edge 11 is provided with a plurality of infrared transmitters 20, and the second edge 12 is provided with a plurality of infrared receivers 30.

[0054] For example, see Figure 3 When at least two infrared touch screens 10 are spliced ​​left and right, the first direction is the horizontal direction (left and right direction), such as Figure 2 and Figure 3 The second direction is the vertical direction (up and down direction), as shown in FIG. Figure 2 and Figure 3 When at least two infrared touch screens 10 are spliced ​​up and down, the first direction is the vertical direction, such as Figure 2 and Figure 3 The Y direction is shown, and the second direction is the horizontal direction, such as Figure 2 and Figure 3 X direction shown.

[0055] In the example where the touch display device includes two infrared touch screens 10, and the two infrared touch screens 10 are spliced ​​left and right, the infrared touch screen 10 located on the left is the first infrared touch screen, and the infrared touch screen 10 located on the right is the second infrared touch screen. The first edge 11 of the first infrared touch screen is the left edge of the first infrared touch screen, and the second edge 12 of the first infrared touch screen is the right edge of the first infrared touch screen. The first edge 11 of the second infrared touch screen is the left edge of the first infrared touch screen, and the second edge 12 of the second infrared touch screen is the right edge of the first infrared touch screen. That is, in the first infrared touch screen and the second infrared touch screen, the infrared transmitter 20 is located on the left side of the infrared touch screen 10, and the infrared receiver 30 is located on the right side of the infrared touch screen 10.

[0056] When the infrared transmitter 20 of the first edge 11 of the first infrared touch screen emits infrared rays, the infrared rays will propagate to the second infrared touch screen. If the infrared receiver 30 of the second infrared touch screen receives the infrared rays emitted by the infrared transmitter 20 of the first infrared touch screen, the second infrared touch screen will be interfered by the first infrared touch screen, affecting the accuracy of the touch positioning of the second infrared touch screen. Therefore, the infrared receiver 30 in the second infrared touch screen only receives the infrared rays emitted by the infrared transmitter 20 of the second infrared touch screen, thereby preventing the second infrared touch screen from being interfered by the first infrared touch screen.

[0057] On the basis of the above embodiments, in a first possible implementation of the present application, at least two infrared touch screens 10 have the same structure, so as to facilitate the production and manufacture of the infrared touch screen 10. Figure 4 In each infrared touch screen 10, the installation height L1 of the infrared transmitter 20 at the first edge 11 is different from the installation height L2 of the infrared receiver 30 at the second edge 12. The installation height L1 of the infrared transmitter 20 at the first edge 11 refers to the height of the transmitting port of the infrared transmitter 20 from the infrared touch screen 10, and the installation height L2 of the infrared receiver 30 at the second edge 12 refers to the height of the receiving port of the infrared receiver 30 from the infrared touch screen 10. The installation height of the infrared transmitter 20 at the first edge 11 is different from the installation height of the infrared receiver 30 at the second edge 12, that is, in the direction perpendicular to the infrared touch screen 10 ( Figure 4 In the Z direction (as shown in FIG. 1 ), there is an angle between the infrared rays of the infrared touch screen 10 and the infrared touch screen 10 , that is, the infrared rays of the infrared touch screen 10 are not parallel to the corresponding infrared touch screen 10 .

[0058] like Figure 4As shown, since the structures of the infrared touch screens 10 are the same, the installation positions of the infrared transmitters 20 and the infrared receivers 30 on the infrared touch screens 10 are the same. Among the multiple infrared touch screens 10, when the infrared rays of the previous infrared touch screen 10 propagate to the next infrared touch screen 10, the infrared rays of the next infrared touch screen 10 are parallel to the infrared rays propagated by the previous infrared touch screen 10 and have a height difference, referring to Figure 4 The solid line and dotted line above the infrared touch screen 10 on the right side in the figure, wherein the solid line is the infrared ray of the next infrared touch screen 10 itself, and the dotted line is the infrared ray propagated by the previous infrared touch screen 10. Such a setting can prevent the next infrared touch screen 10 from receiving the infrared ray of the previous infrared touch screen 10. The previous infrared touch screen 10 refers to the infrared touch screen 10 located in the front along the propagation direction of the infrared ray, and the next infrared touch screen 10 refers to the infrared touch screen 10 located in the back along the propagation direction of the infrared ray. It can be understood that the further back the infrared touch screen 10 is, the more infrared rays there are above it.

[0059] In each infrared touch screen 10, the plurality of infrared transmitters 20 are installed at the same height at the first edge 11, and the plurality of infrared receivers 30 are installed at the same height at the second edge 12. That is, all the infrared transmitters 20 are installed at the same height at the first edge 11, and all the infrared receivers 30 are installed at the same height at the second edge 12. With such a configuration, all the infrared touch screens 10 have only two installation heights, which facilitates the manufacture of the infrared touch screens 10.

[0060] Alternatively, refer to Figure 5 In each infrared touch screen 10, the installation heights of the plurality of infrared transmitters 20 at the first edge 11 are at least partially different, and the installation heights of the plurality of infrared receivers 30 at the second edge 12 are the same. That is, in each infrared touch screen 10, the angles between the infrared rays formed by each group of infrared touch elements and the infrared touch screen 10 are at least partially different, and the angles between the infrared rays formed by the same group of infrared touch elements and the infrared touch screen 10 are the same.

[0061] The angle of the infrared ray may be the angle between the infrared ray and the horizontal plane, or the angle between the infrared ray and the infrared touch screen 10. This arrangement can also reduce mutual interference between different groups of infrared touch elements, so that at least the angles of the infrared ray received by the infrared receiver 30 are different, further reducing interference between the infrared touch screens 10. Preferably, the installation heights of the plurality of infrared transmitters 20 at the first edge 11 are different, and the installation heights of the plurality of infrared receivers 30 at the second edge 12 are the same.

[0062] Alternatively, refer to Figure 6In each infrared touch screen 10, the installation heights of the multiple infrared transmitters 20 at the first edge 11 are the same, and the installation heights of the multiple infrared receivers 30 at the second edge 12 are at least partially different. That is, in each infrared touch screen 10, the angles between each infrared ray and the infrared touch screen 10 are at least partially different, that is, the angles of the infrared rays received by each infrared receiver 30 are at least partially different, further reducing the interference between the infrared touch screens 10. Preferably, the installation heights of the multiple infrared transmitters 20 at the first edge 11 are the same, and the installation heights of the multiple infrared receivers 30 at the second edge 12 are different.

[0063] It should be noted that, in the embodiment of the present application, the installation height of the multiple infrared transmitters 20 at the first edge 11 and the installation height of the multiple infrared receivers 30 at the second edge 12 in each infrared touch screen 10 are not limited. For example, in each infrared touch screen 10, the installation heights of the multiple infrared transmitters 20 at the first edge 11 are at least partially different, and the installation heights of the multiple infrared receivers 30 at the second edge 12 are also at least partially different.

[0064] Based on the above embodiment, in a second possible implementation of the present application, refer to Figure 7 At least two infrared touch screens 10 have the same structure, so as to facilitate the production and manufacture of the infrared touch screens 10. In each infrared touch screen 10, an infrared transmitter 20 corresponds to an infrared receiver 30.

[0065] like Figure 7 As shown, in each infrared touch screen 10, the infrared transmitter 20 and the infrared receiver 30 are staggered along the second direction, that is, in the same infrared touch screen 10, the infrared transmitter 20 and the infrared receiver 30 corresponding to the infrared transmitter 20 are staggered along the first direction, that is, the orthographic projection of the infrared rays between the infrared transmitter 20 and the infrared receiver 30 corresponding to the infrared touch screen 10 has an angle with the second direction. In this arrangement, the orthographic projection of the infrared rays of any infrared touch screen 10 on the infrared touch screen 10 is not in a straight line with the orthographic projection of the infrared rays of other infrared touch screens 10 on the infrared touch screen 10, so the infrared receiver 30 of any infrared touch screen 10 will not receive the infrared rays emitted by the infrared transmitters 20 of other infrared touch screens 10.

[0066] Preferably, in each infrared touch screen 10 , the installation height of the multiple infrared transmitters 20 at the first edge 11 is the same as the installation height of the multiple infrared receivers 30 at the second edge 12 , so that all infrared touch screens 10 have only one installation height, simplifying the infrared touch screen 10 .

[0067] In order to further reduce the interference to the infrared receiver 30, in some possible examples of the present application, reference Figure 8 The second edge 12 is also provided with a first aperture 40, which is provided on the side of the infrared receiver 30 facing the infrared transmitter 20, so that the infrared receiver 30 receives infrared rays at a preset angle. A plurality of first apertures 40 may be provided, and the plurality of first apertures 40 correspond to the plurality of infrared receivers 30 one by one.

[0068] The first aperture 40 may be a pinhole aperture, and the light-through hole of the pinhole aperture may be circular, the center of which is located on the central axis of the infrared light emitted by the infrared transmitter 20. The infrared transmitter 20, the pinhole aperture and the infrared receiver 30 are coaxially aligned, so that the infrared receiver 30 receives the red line emitted by the infrared transmitter 20 of the same infrared touch screen 10.

[0069] Exemplarily, the pinhole aperture may include a shell, the shell encloses a cavity, the infrared receiver 30 is disposed in the cavity, and a small hole is disposed on the shell wall opposite to the receiving port of the infrared transmitter 20, and infrared rays enter the cavity through the small hole and are received by the infrared receiver 30 in the cavity. The diameter of the pinhole aperture may be 0.2 mm-2 mm, and the inner wall surface of the cavity may be provided with a black coating. Of course, the pinhole aperture may also include a substrate, and the substrate is provided with a small hole.

[0070] In other possible examples, refer to Fig. 9 The first edge 11 is also provided with a second aperture 50, which is provided on the side of the infrared emitter 20 facing the infrared receiver 30 to limit the angle of the infrared rays emitted by the infrared emitter 20. A plurality of second apertures 50 may be provided, and the plurality of first apertures 40 correspond one to one to the plurality of infrared emitters 20. The structure of the second aperture 50 may refer to the structure of the first aperture 40, and will not be described in detail here.

[0071] In some other possible examples, reference Fig.10 The second edge 12 is provided with a first aperture 40, which is provided on the side of the infrared receiver 30 facing the infrared transmitter 20, and the first edge 11 is provided with a second aperture 50, which is provided on the side of the infrared transmitter 20 facing the infrared receiver 30. That is, the angle of the infrared rays emitted by the infrared transmitter 20 and the angle of the infrared rays received by the infrared receiver 30 are both limited, further preventing the incidence of other infrared rays, and reducing or avoiding interference between the infrared touch screens 10.

[0072] In the embodiments of the present application, Figure 2 and Figure 3As shown, each infrared touch screen 10 further includes a third edge 13, and a fourth edge 14 arranged opposite to the third edge 13. The third edge 13 and the fourth edge 14 are both located between the first edge 11 and the second edge 12. For example, the first edge 11, the third edge 13, the second edge 12 and the fourth edge 14 are sequentially connected to form a closed ring. The first edge 11 and the second edge 12 may extend along the second direction, and the third edge 13 and the fourth edge 14 may extend along the first direction.

[0073] The third edge 13 is provided with a plurality of infrared transmitters 20, and the fourth edge 14 is provided with a plurality of infrared receivers 30. The installation height of the plurality of infrared transmitters 20 at the third edge 13 is the same as the installation height of the plurality of infrared receivers 30 at the fourth edge 14, so as to simplify the manufacture of the infrared touch screen 10. Of course, in the embodiment of the present application, the installation height of the plurality of infrared transmitters 20 at the third edge 13 and the installation height of the plurality of infrared receivers 30 at the fourth edge 14 may also be different, the installation heights of the infrared transmitters 20 at the third edge 13 in the same infrared touch screen 10 may also be partially different, and / or the installation heights of the infrared receivers 30 at the fourth edge 14 in the same infrared touch screen 10 may also be partially different.

[0074] In some other possible embodiments, reference Fig.11 , multiple infrared touch screens 10 are arranged in M ​​rows and N columns, where M and N are both positive integers greater than 1. Fig.11 As shown, four infrared touch screens 10 are spliced ​​into a whole in the form of two rows and two columns.

[0075] Each infrared touch screen includes a first edge 11, a second edge 12, a third edge 13 and a fourth edge 14. The first edge 11 and the second edge 12 are arranged along a first direction ( Fig.11 X direction) and arranged relatively along the second direction ( Fig.11 the third edge 13 and the fourth edge 14 are arranged opposite to each other along the second direction and extend along the first direction, and the first direction is perpendicular to the second direction.

[0076] The first edge 11 and the third edge 13 are provided with a plurality of infrared transmitters 20, and the second edge 12 and the fourth edge 14 are provided with a plurality of infrared receivers 30. In some possible examples, the installation height of the infrared transmitter 20 at the first edge 11 is different from the installation height of the infrared receiver 30 at the second edge 12, and the installation height of the infrared transmitter 20 at the third edge 13 is different from the installation height of the infrared receiver 30 at the fourth edge 14.

[0077] With such configuration, among the multiple infrared touch screens 10 arranged along the first direction, the infrared receiver 30 of each infrared touch screen 10 will not receive the infrared rays emitted by the infrared transmitter 20 of other infrared touch screens 10, thereby preventing the infrared touch screen 10 from being interfered with by other infrared touch screens 10. Similarly, among the multiple infrared touch screens 10 arranged along the second direction, the infrared receiver 30 of each infrared touch screen 10 will not receive the infrared rays emitted by the infrared transmitter 20 of other infrared touch screens 10, thereby preventing the infrared touch screen 10 from being interfered with by other infrared touch screens 10.

[0078] Based on the above example, in each infrared touch screen 10, multiple infrared transmitters 20 are installed at the same height on the first edge 11, and multiple infrared receivers 30 are installed at the same height on the second edge 12; multiple infrared transmitters 20 are installed at the same height on the third edge 13, and multiple infrared receivers 30 are installed at the same height on the fourth edge 14.

[0079] Alternatively, in each infrared touch screen 10, the installation heights of the multiple infrared transmitters 20 at the first edge 11 are at least partially different, and the installation heights of the multiple infrared receivers 30 at the second edge 12 are the same; the installation heights of the multiple infrared transmitters 20 at the third edge 13 are at least partially different, and the installation heights of the multiple infrared receivers 30 at the fourth edge 14 are the same.

[0080] Alternatively, in each infrared touch screen 10, the installation heights of multiple infrared transmitters 20 on the first edge 11 are the same, and the installation heights of multiple infrared receivers 30 on the second edge 12 are at least partially different; the installation heights of multiple infrared transmitters 20 on the third edge 13 are the same, and the installation heights of multiple infrared receivers 30 on the fourth edge 14 are at least partially different.

[0081] Of course, in the embodiment of the present application, other methods can also be used to realize that the infrared receiver 30 only receives the infrared rays emitted by the infrared transmitter 20 of the same infrared touch screen 10. For example, the second edge 12 is also provided with a first aperture, which is arranged on the side of the infrared receiver 30 facing the infrared transmitter 20; the fourth edge 14 is also provided with a second aperture, which is arranged on the side of the infrared receiver 30 facing the infrared transmitter 20, so that the infrared receiver 30 receives infrared rays of a preset angle. When multiple infrared touch screens 10 are arranged in M ​​rows and N columns, the situation where multiple infrared touch screens 10 are arranged in sequence along the first direction can be referred to. At this time, since some of the multiple infrared touch screens 10 are arranged along the second direction, the multiple infrared touch screens 10 arranged along the second direction also need to prevent the infrared receiver 30 from receiving the infrared rays emitted by the infrared transmitters 20 of other infrared touch screens 10. The implementation method thereof can refer to the implementation method of the infrared touch screens 10 arranged along the first direction.

[0082] In some other possible implementations of the present application, the structures of the infrared touch screens 10 are different, and the installation heights of the infrared transmitters 20 and / or infrared receivers 30 of different infrared touch screens 10 are different; or, the installation positions of the infrared transmitters 20 and / or infrared receivers 30 of different infrared touch screens 10 are different. In other words, the installation positions, installation heights, etc. of the infrared receivers 30 and / or infrared transmitters 20 in each infrared touch screen 10 may be different. The installation heights of the infrared receivers 30 and / or infrared transmitters 20 in the same infrared touch screen 10 may be the same or different.

[0083] For example, Fig.12 As shown, in the same infrared touch screen 10, the installation height of the infrared transmitter 20 at the first edge 11 is the same as the installation height of the infrared receiver 30 at the second edge 12, and the heights of the infrared transmitter 20 of any infrared touch screen 10 are different from the infrared transmitters 20 of other infrared touch screens 10. In this way, the infrared rays of each infrared touch screen 10 overlap with the infrared touch screen 10, and the infrared rays of each infrared touch screen 10 have different heights, thereby avoiding the cross-screen reception of infrared rays.

[0084] In the touch display device provided in the embodiment of the present application, at least two infrared touch screens 10 are spliced ​​together to form a touch display device, and an infrared transmitter 20 and an infrared receiver 30 are respectively provided at two opposite edges of each infrared touch screen 10, and the infrared receiver 30 only receives infrared rays emitted by the infrared transmitter 20 of the same infrared touch screen 10, so that the infrared receiver 30 will not receive infrared rays emitted by the infrared transmitter 20 of other infrared touch screens 10, thereby avoiding cross-screen reception of infrared rays, and further avoiding interference from other infrared touch screens 10, thereby improving the accuracy of touch positioning.

[0085] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0086] It should be noted that the embodiments represented by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0087] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0088] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0089] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A touch display device, characterized in that: It comprises at least two infrared touch screens spliced ​​together, wherein two opposite edges of each infrared touch screen are respectively provided with an infrared transmitter and an infrared receiver, and the infrared receiver is configured to receive only infrared rays emitted by the infrared transmitter of the same infrared touch screen; and the installation heights of the infrared transmitters and / or infrared receivers of different infrared touch screens are different.

2. The touch display device according to claim 1, characterized in that: It comprises at least two infrared touch screens sequentially spliced ​​along a first direction; The infrared touch screen includes a first edge and a second edge which are arranged opposite to each other along a first direction and extend along a second direction perpendicular to the first direction. The first edge is provided with a plurality of the infrared transmitters, and the second edge is provided with a plurality of the infrared receivers.

3. The touch display device according to claim 2, characterized in that: The installation height of the infrared transmitter at the first edge is different from the installation height of the infrared receiver at the second edge.

4. The touch display device according to claim 3, characterized in that: In the same infrared touch screen, the installation heights of the multiple infrared transmitters on the first edge are the same, and the installation heights of the multiple infrared receivers on the second edge are the same; or, The installation heights of the plurality of infrared transmitters on the first edge are at least partially different, and the installation heights of the plurality of infrared receivers on the second edge are the same; or, The installation heights of the plurality of infrared transmitters on the first edge are the same, and the installation heights of the plurality of infrared receivers on the second edge are at least partially different.

5. The touch display device according to claim 2, characterized in that: The infrared transmitter on the first edge and the infrared receiver on the second edge are staggered along the second direction.

6. The touch display device according to any one of claims 2 to 5, characterized in that: The second edge is further provided with a first aperture, and the first aperture is provided on a side of the infrared receiver facing the infrared transmitter, so that the infrared receiver receives infrared rays at a preset angle.

7. The touch display device according to claim 6, characterized in that: The first edge is also provided with a second aperture, and the second aperture is arranged on a side of the infrared transmitter facing the infrared receiver to limit the angle of the infrared rays emitted by the infrared transmitter.

8. The touch display device according to claim 2, characterized in that: A third edge is provided between the first edge and the second edge of each infrared touch screen, and a fourth edge opposite to the third edge; The third edge is provided with a plurality of the infrared transmitters, the fourth edge is provided with a plurality of the infrared receivers, and the installation height of the plurality of the infrared transmitters on the third edge is the same as the installation height of the plurality of the infrared receivers on the fourth edge.

9. The touch display device according to claim 1, characterized in that: The plurality of infrared touch screens are arranged in M ​​rows and N columns, where M and N are both positive integers greater than 1; The infrared touch screen comprises a first edge and a second edge which are arranged opposite to each other along a first direction and extend along a second direction perpendicular to the first direction, and a third edge and a fourth edge which are arranged opposite to each other along the second direction and extend along the first direction, the first edge and the third edge are provided with a plurality of the infrared transmitters, and the second edge and the fourth edge are provided with a plurality of the infrared receivers; The installation height of the infrared transmitter at the first edge is different from the installation height of the infrared receiver at the second edge; the installation height of the infrared transmitter at the third edge is different from the installation height of the infrared receiver at the fourth edge.

Images