Optical touch display device

Abstract

The utility model relates to an optical touch display device which comprises a machine shell, a uniform light diffusion layer, two or more optical modules, an isolation layer, a substrate, two or more infrared light emitting devices and two or more visible light emitting devices. A display surface is arranged on one side of the casing, and the substrate covers the display surface of the casing; the dodging diffusion layer covers one side, provided with the display surface, of the shell, and the isolation layer covers the dodging diffusion layer; the more than two optical modules are arranged on the side edge of the casing, and the camera shooting end of each optical module faces the display surface of the casing; more than two infrared light emitting devices and visible light emitting devices are arranged on the substrate in an array manner, so that the distribution uniformity of an infrared light field is improved; the light-emitting ends of the infrared light-emitting device and the visible light-emitting device face the uniform light diffusion layer; the infrared light emitting device is suitable for supplementing light when the optical module shoots the display surface.

Description

Technical Field

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

[0002] An optical touch screen is a touch screen based on optical touch technology. Different from existing touch technologies such as resistors and capacitors, an optical touch screen responds quickly to delicate movements and can be applied to conference venues, commercial display venues, education and training venues, exhibitions, the financial industry, and the military. Existing optical touch screens are equipped with cameras to shoot the entire screen, determine the position of a hand or a trigger, and need to set up an infrared light emitting device on the touch screen as a fill light device when the camera is shooting; at the same time, the optical touch screen also needs to be equipped with a visible light emitting device for external effect display; however, the placement of the infrared light emitting device on the screen will have a greater impact on the uniformity of the distribution of the infrared light field, which will affect the fill light effect; this application proposes an optical touch display device that can improve the uniformity of the distribution of the infrared light field. Summary of the invention

[0003] In view of this, the present application proposes an optical touch display device.

[0004] According to one aspect of the present application, an optical touch display device is provided, characterized in that it includes: a housing, a uniform light diffusion layer, two or more optical modules, an isolation layer, a substrate, two or more infrared light emitting devices, and two or more visible light emitting devices;

[0005] A display surface is provided on one side of the casing, and the substrate covers the display surface of the casing;

[0006] The light uniformity diffusion layer covers the side of the housing provided with the display surface, and the isolation layer covers the light uniformity diffusion layer;

[0007] More than two optical modules are arranged on the side of the housing, and the camera end of each optical module faces the display surface of the housing;

[0008] More than two infrared light emitting devices and visible light emitting devices are arranged in an array on the substrate; and the light emitting ends of the infrared light emitting devices and the visible light emitting devices are all facing the uniform light diffusion layer; the infrared light emitting devices are suitable for supplementary light when the optical module shoots the display surface.

[0009] In a possible implementation, each infrared light emitting device corresponds one-to-one with each visible light emitting device and is co-located, or each infrared light emitting device corresponds one-to-one with each visible light emitting device and is staggered.

[0010] In a possible implementation, when each infrared light emitting device corresponds to each visible light emitting device one by one and is arranged in a staggered manner, the visible light emitting devices and the infrared light emitting devices are arranged alternately in sequence.

[0011] In a possible implementation, the distance between each two adjacent rows of visible light emitting devices is the same as the distance between each two adjacent rows of infrared light emitting devices; the distance between each two adjacent columns of visible light emitting devices is the same as the distance between each two adjacent columns of infrared light emitting devices.

[0012] In a possible implementation, an infrared light emitting device is installed at the edge of the substrate.

[0013] In a possible implementation, when infrared light emitting devices are installed at edge positions of the substrate, the infrared light emitting devices are evenly arranged.

[0014] In a possible implementation, the substrate is made of aluminum.

[0015] In a possible implementation, the back of the housing is provided with two or more wire through holes suitable for passing wires of the infrared light emitting device and the visible light emitting device.

[0016] In a possible implementation, it further includes: an optical module bracket; the optical module is connected to the housing via the optical module bracket.

[0017] Beneficial effects: Two or more infrared light emitting devices are suitable for emitting infrared light outward, so as to provide illumination fill light when the optical module is shooting for the display screen. The array arrangement of two or more infrared light emitting devices improves the uniformity of the infrared light field distribution, and the array arrangement of two or more visible light emitting devices also improves the uniformity of the visible light field distribution, avoiding the phenomenon of uneven brightness on the display screen. The uniform light diffusion layer enables light to propagate in different directions, thereby achieving the effect of optical diffusion, improving the efficiency of the light source, and making the light softer and more uniform.

[0018] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0020] Figure 1 A main structure diagram of an optical touch display device is shown;

[0021] Figure 2 A top view of an optical touch display device is shown;

[0022] Figure 3 A layout diagram showing an infrared light emitting device of a first embodiment;

[0023] Figure 4 A layout diagram showing an infrared light emitting device of a second embodiment;

[0024] Figure 5 A layout diagram showing an infrared light emitting device of a third embodiment;

[0025] Figure 6 A layout diagram showing an infrared light emitting device of a fourth embodiment;

[0026] Figure 7 A layout diagram showing an infrared light emitting device of a fifth embodiment;

[0027] Figure 8 A layout diagram showing an infrared light emitting device of a sixth embodiment;

[0028] Fig. 9 A partial enlarged view of an optical touch display device is shown;

[0029] Fig.10 A partial enlarged view of an optical touch display device is shown;

[0030] Fig.11 A back view of the optical touch display device is shown;

[0031] Fig.12 The main structure diagram and partial enlarged diagram of the optical touch display device are shown. DETAILED DESCRIPTION

[0032] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0033] Among them, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0036] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0037] like Figure 1 and Fig.12 As shown, the optical touch display device includes: a housing 100, a uniform light diffusion layer 700, two or more optical modules 500 (the "two or more optical modules 500" herein include "two optical modules 500"), an isolation layer 600, a substrate 800, two or more infrared light emitting devices 200, and two or more visible light emitting devices 300; a display surface is provided on one side of the housing 100, and the substrate 800 covers the display surface of the housing 100; the uniform light diffusion layer 700 covers the side of the housing 100 provided with the display surface, The isolation layer 600 covers the uniform light diffusion layer 700; more than two optical modules 500 are arranged on the side of the housing 100, and the camera end of each optical module 500 is facing the display surface of the housing 100; more than two infrared light emitting devices 200 and visible light emitting devices 300 are arranged in an array on the substrate 800; and the light emitting ends of the infrared light emitting devices 200 and the visible light emitting devices 300 are facing the uniform light diffusion layer 700; the infrared light emitting device 200 is suitable for fill light when the optical module 500 shoots the display surface.

[0038] Here, it should be noted that the housing 100 is suitable for providing a display installation base for the light-emitting device, and the optical module 500 on the side of the housing 100 is suitable for shooting the display surface, so as to determine the position of the human hand or the trigger. The substrate 800 covers the display surface and is located at the bottom of the infrared light-emitting device 200 and the visible light-emitting device 300. Its function is to reflect the light projected downward by all light-emitting devices back and re-reflect it back to the uniform light diffusion layer 700, thereby reducing light loss and increasing light brightness. The uniform light diffusion layer 700 enables light to propagate in different directions, thereby achieving the effect of optical diffusion, improving the efficiency of the light source, and making the light softer and more uniform. The setting of the isolation layer 600 is suitable for protecting the uniform light diffusion layer 700 to prevent dust from entering and affecting the color effect. More than two infrared light-emitting devices 200 are suitable for emitting infrared light outward, so as to provide lighting fill light when the optical module 500 shoots the display screen. The array arrangement of more than two infrared light emitting devices 200 improves the uniformity of infrared light field distribution, and the array arrangement of more than two visible light emitting devices 300 also improves the uniformity of visible light field distribution, avoiding uneven brightness of the display screen.

[0039] In a possible implementation, two optical modules 500 are provided; preferably, the two optical modules 500 are respectively fixedly disposed at two top corners of the top edge of the housing 100 .

[0040] In a possible implementation, each infrared light emitting device 200 corresponds to each visible light emitting device 300 one by one and is arranged in the same position, or each infrared light emitting device 200 corresponds to each visible light emitting device 300 one by one and is arranged in a staggered position. Here, it should be noted that the infrared light emitting device 200 corresponds to each visible light emitting device 300 one by one, that is, there are two arrangements of the infrared light emitting devices 200 and each visible light emitting device 300 when the number is the same: one visible light emitting device 300 is arranged at the installation position of one infrared light emitting device 200, and one infrared light emitting device 200 and one visible light emitting device 300 are arranged in a staggered position.

[0041] Example 1: Figure 3 As shown, each infrared light emitting device 200 corresponds to each visible light emitting device 300 and is co-located. That is, each infrared light emitting device 200 is installed with a corresponding visible light emitting device 300 to form a group of light emitting units, and multiple groups of light emitting units are arranged in an array on the substrate 800.

[0042] Preferably, the distance between any two adjacent rows of light-emitting units is the same, which can improve the uniformity of the longitudinal arrangement of the light-emitting units; the distance between any two adjacent light-emitting units on the left and right in each row is the same, which can improve the uniformity of the transverse arrangement of the light-emitting units.

[0043] Further preferably, the multiple groups of light emitting units are arranged in a matrix.

[0044] In summary, if Figure 3 As shown, there are 50 visible light emitting devices 300 and 50 infrared light emitting devices 200, forming 50 groups of light emitting units. The 50 groups of light emitting units are arranged in a matrix in the form of 5 rows and 10 columns.

[0045] According to the above embodiment 1: It should be noted that placing the infrared light emitting device 200 and the visible light emitting device 300 at the same position can simplify the overall layout, reduce the number of second wire perforations on the substrate 800, and improve production efficiency.

[0046] Example 2: Figure 4 As shown, each infrared light emitting device 200 corresponds to each visible light emitting device 300 one by one and is staggered, each visible light emitting device 300 and each infrared light emitting device 200 are arranged alternately in sequence, and a row of visible light emitting devices 300 and a row of infrared light emitting devices 200 are arranged alternately in sequence.

[0047] Preferably, all infrared light emitting devices 200 are arranged in a matrix layout of multiple rows and columns on the substrate 800; all visible light emitting devices 300 are arranged in a matrix layout of multiple rows and columns on the substrate 800. The number of rows of infrared light emitting devices 200 is the same as the number of rows of visible light emitting devices 300; the number of columns of infrared light emitting devices 200 is the same as the number of columns of visible light emitting devices 300.

[0048] Furthermore, the distance between any two adjacent rows of visible light emitting devices 300 is the same as the distance between any two adjacent rows of infrared light emitting devices 200. Such an arrangement can improve the uniformity of the longitudinal arrangement of the visible light emitting devices 300 and the infrared light emitting devices 200; the distance between two adjacent visible light emitting devices 300 on the left and right in each row is the same as the distance between two adjacent infrared light emitting devices 200 on the left and right in each row. Such an arrangement can improve the uniformity of the transverse arrangement of the visible light emitting devices 300 and the infrared light emitting devices 200.

[0049] In summary, if Figure 4As shown, there are 50 visible light emitting devices 300 in total; there are also 50 infrared light emitting devices 200 in total, and the 50 visible light emitting devices 300 are arranged in a matrix form in the form of 5 rows and 10 columns. Similarly, the 50 infrared light emitting devices 200 are arranged in a matrix form in the form of 5 rows and 10 columns; each row of infrared light emitting devices 200 and each row of visible light emitting devices 300 are arranged alternately, that is, arranged from top to bottom in the form of...a row of visible light emitting devices 300-a row of infrared light emitting devices 200-a row of visible light emitting devices 300-a row of infrared light emitting devices 200.... A total of 10 rows and 10 columns of light source layout are formed.

[0050] Preferably, the distance between one row of infrared light emitting devices 200 and the previous row of visible light emitting devices 300 is 1 / 5-1 / 2 of the distance between two adjacent rows of visible light emitting devices 300.

[0051] Example 3: Figure 5 As shown, when each infrared light emitting device 200 corresponds to each visible light emitting device 300 one by one and is staggered, each visible light emitting device 300 and each infrared light emitting device 200 are arranged alternately in sequence, and a row of visible light emitting devices 300 and a row of infrared light emitting devices 200 are arranged alternately in sequence.

[0052] Preferably, all infrared light emitting devices 200 are arranged in a matrix layout of multiple rows and columns on the substrate 800; all visible light emitting devices 300 are arranged in a matrix layout of multiple rows and columns on the substrate 800. The number of rows of infrared light emitting devices 200 is the same as the number of rows of visible light emitting devices 300; the number of columns of infrared light emitting devices 200 is the same as the number of columns of visible light emitting devices 300.

[0053] Furthermore, the distance between any two adjacent rows of visible light emitting devices 300 is the same as the distance between any two adjacent rows of infrared light emitting devices 200; the distance between two adjacent visible light emitting devices 300 in each row is the same as the distance between two adjacent infrared light emitting devices 200 in each row.

[0054] In summary, if Figure 5As shown, there are 50 visible light emitting devices 300 in total; there are also 50 infrared light emitting devices 200 in total, and the 50 visible light emitting devices 300 are arranged in a matrix form in the form of 5 rows and 10 columns. Similarly, the 50 infrared light emitting devices 200 are arranged in a matrix form in the form of 5 rows and 10 columns, and each column of infrared light emitting devices 200 and each column of visible light emitting devices 300 are arranged alternately, that is, they are arranged from left to right in the form of... one column of visible light emitting devices 300-one column of infrared light emitting devices 200-one column of visible light emitting devices 300-one column of infrared light emitting devices 200...., forming a light source layout of 5 rows and 20 columns.

[0055] Preferably, the distance between one column of infrared light emitting devices 200 and the left column of visible light emitting devices 300 is 1 / 5-1 / 2 of the distance between two adjacent columns of visible light emitting devices 300.

[0056] In a possible implementation, a row of infrared light emitting devices 200 is disposed between every two adjacent rows of visible light emitting devices 300 , and each column of visible light emitting devices 300 and each column of infrared light emitting devices 200 are staggered.

[0057] Example 4: Figure 6 As shown, there are 50 visible light emitting devices 300 in total; there are 36 infrared light emitting devices 200 in total, and the 50 visible light emitting devices 300 are arranged in a matrix form in the form of 5 rows and 10 columns. Similarly, the 36 infrared light emitting devices 200 are arranged in a matrix form in the form of 4 rows and 9 columns, forming a light source layout of 9 rows and 19 columns. Preferably, each column of infrared light emitting devices 200 is located in the middle of two adjacent columns of visible light emitting devices 300; each row of infrared light emitting devices 200 is located in the middle of two adjacent rows of visible light emitting devices 300.

[0058] According to the above Examples 2, 3 and 4: It should be noted that, because the parameters of infrared light are different from those of visible light, and the optical touch system has different requirements for infrared light intensity and the human eye has different requirements for visible light intensity, in Examples 2, 3 and 4, each infrared light emitting device 200 and each visible light emitting device 300 are staggered and placed, which can further improve the uniformity of the infrared light field distribution and avoid mutual interference between the light sources of the infrared light emitting device 200 and the visible light emitting device 300.

[0059] In a possible implementation, an infrared light emitting device 200 is installed at the edge of the substrate 800. It should be noted that if the infrared light emitting device 200 is not installed at the peripheral position of the substrate 800, it is easy to cause the peripheral position of the substrate 800 to be unable to effectively fill light. At this time, the optical module 500 cannot clearly capture the triggering situation of the trigger object at the peripheral position of the substrate 800, resulting in a touch blind area. Therefore, adding infrared light emitting devices 200 separately around the substrate 800 can improve the comprehensiveness and uniformity of the infrared light field distribution.

[0060] Example 5: Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, four infrared light emitting devices 200 are provided at the edge of the substrate 800; and the four infrared light emitting devices 200 are respectively provided at the four corners of the substrate 800. It should be noted that this solution is used when the main body of the display surface is rectangular, square or other quadrilateral shapes, and an infrared light emitting device 200 is respectively provided at the four corners to improve the fill light effect at the four corners of the display surface.

[0061] Embodiment 6: When infrared light emitting devices 200 are installed at the edge of the substrate 800, the infrared light emitting devices 200 are evenly arranged. That is, multiple infrared light emitting devices 200 are installed around the substrate 800, and the multiple infrared light emitting devices 200 are evenly arranged. Figure 8 As shown, four infrared light emitting devices 200 are provided on the upper edge of the substrate 800, and the distance between any two adjacent infrared light emitting devices 200 is the same; similarly, four infrared light emitting devices 200 are provided on the lower edge of the substrate 800, and the distance between any two adjacent infrared light emitting devices 200 is the same. It should be noted that this solution is adapted to the main body of the display surface being in other shapes such as a rectangular shape, a square shape, a circular shape, an elliptical shape, etc.

[0062] Embodiment 7: When an infrared light emitting device 200 is installed at the edge of the substrate 800, an infrared light emitting device 200 is respectively arranged at a position close to two optical modules 500 on the substrate 800. Figure 7 As shown, the display surface and the substrate 800 are in a rectangular shape, and an infrared light emitting device 200 is respectively arranged at two vertex corners of the substrate 800 close to the two optical modules 500 .

[0063] Preferably, the main body of the substrate 800 is a rectangular structure. Further, the substrate 800 is made of aluminum. It should be noted that the aluminum reflective film has excellent folding resistance and good toughness, rarely has cracks, and has no bending and cracking phenomenon, so it has a strong light blocking property.

[0064] In one possible implementation, Fig.11 As shown, the back of the housing 100 is provided with more than two first wire through holes 110, and the main body of the first wire through hole 110 is a tubular structure, which runs through the back of the housing 100 and is suitable for passing the wires of the infrared light emitting device 200 and the visible light emitting device 300. Preferably, the main body of the housing 100 is a rectangular parallelepiped structure, and a rectangular groove is opened on one side of the housing 100 to form a display surface, and the substrate 800 covers the display surface.

[0065] Furthermore, four first wire through holes 110 are provided, and the four first wire through holes are arranged in two rows and two columns on the back side of the housing 100 .

[0066] It should be noted that all infrared light emitting devices 200, all visible light emitting devices 300 and the substrate 800 are fixedly connected by soldering. Furthermore, the infrared light emitting devices 200 use infrared light emitting diodes, and the visible light emitting devices 300 use light emitting diodes.

[0067] In one possible implementation, Figure 3 As shown, when each infrared light emitting device 200 corresponds to each visible light emitting device 300 and is arranged in the same position; a second wire through-hole is opened at the installation position of each group of infrared light emitting devices 200 and visible light emitting devices 300, and the wires of the infrared light emitting devices 200 and the wires of the visible light emitting devices 300 at the same installation position all pass through the substrate 800 through the same second wire through-hole.

[0068] In one possible implementation, Figure 4 , Figure 5 , Figure 6 As shown, when each infrared light emitting device 200 and each visible light emitting device 300 are arranged in a staggered manner, a second wire through hole is provided on the substrate 800 at the position where each infrared light emitting device 200 and each visible light emitting device 300 are installed, and the wires of each infrared light emitting device 200 and each visible light emitting device 300 pass through the substrate 800 separately through their respective second wire through holes.

[0069] In a possible implementation, the optical module 500 is further included: an optical module bracket 510; and the optical module 500 is connected to the housing 100 via the optical module bracket 510. Fig. 9 and Fig.10As shown, the two optical module brackets 510 have the same structure, a groove is provided on one side of the optical module bracket 510, and the shape of the groove matches the shape of the top corner of the casing 100. The optical module bracket 510 is placed at the top corner of the casing 100 and is fixedly connected to the casing 100. An optical module 500 is fixedly provided on one side of the optical module bracket 510, and the optical module 500 is protruded relative to the optical module bracket 510 and protrudes in front of the isolation layer 600.

[0070] like Fig.12 As shown, the main bodies of the uniform light diffusion layer 700 and the isolation layer 600 are rectangular structures, the uniform light diffusion layer 700 covers the display surface side of the housing 100, and the isolation layer 600 covers the side of the uniform light diffusion layer 700 away from the housing 100. Preferably, the isolation layer 600 is made of tempered glass. Furthermore, the uniform light diffusion layer 700 and the isolation layer 600 are fixed by bonding.

[0071] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An optical touch display device, characterized in that: include: A housing, a uniform light diffusion layer, two or more optical modules, an isolation layer, a substrate, two or more infrared light emitting devices, and two or more visible light emitting devices; A display surface is provided on one side of the housing, and the substrate covers the display surface of the housing; The uniform light diffusion layer covers the side of the housing provided with the display surface, and the isolation layer covers the uniform light diffusion layer; More than two optical modules are arranged on the side of the housing, and the camera end of each optical module faces the display surface of the housing; More than two infrared light emitting devices and visible light emitting devices are arranged in an array on the substrate; and the light emitting ends of the infrared light emitting devices and the visible light emitting devices are both facing the uniform light diffusion layer; the infrared light emitting devices are suitable for providing fill light when the optical module shoots the display surface.

2. The optical touch display device according to claim 1, characterized in that: Each of the infrared light emitting devices corresponds to each of the visible light emitting devices one by one and are arranged in the same position, or each of the infrared light emitting devices corresponds to each of the visible light emitting devices one by one and are arranged in a staggered position.

3. The optical touch display device according to claim 2, characterized in that: When each of the infrared light emitting devices corresponds to each of the visible light emitting devices one by one and is arranged in a staggered manner, the visible light emitting devices and the infrared light emitting devices are arranged alternately in sequence.

4. The optical touch display device according to claim 3, characterized in that: The distance between each two adjacent rows of the visible light emitting devices is the same as the distance between each two adjacent rows of the infrared light emitting devices; the distance between each two adjacent columns of the visible light emitting devices is the same as the distance between each two adjacent columns of the infrared light emitting devices.

5. The optical touch display device according to any one of claims 1 to 4, characterized in that: The infrared light emitting device is also installed at the edge of the substrate.

6. The optical touch display device according to claim 5, characterized in that: When the infrared light emitting devices are installed at the edge positions of the substrate at the same time, the infrared light emitting devices are evenly arranged.

7. The optical touch display device according to any one of claims 1 to 4, characterized in that: The substrate is made of aluminum.

8. The optical touch display device according to claim 1, characterized in that: The back of the housing is provided with more than two wire through holes, which are suitable for passing the wires of the infrared light emitting device and the visible light emitting device.

9. The optical touch display device according to claim 1, characterized in that: Also includes: Optical module bracket; The optical module is connected to the housing via the optical module bracket.

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