Display device

Abstract

The utility model discloses a kind of display equipment, the display equipment is by integrating infrared emission module between the backplate and optical film assembly inside display screen, and infrared receiving module is arranged in the periphery of use surface, infrared light is emitted to use surface direction using emission module, and infrared light image of screen area is obtained by receiving module, to realize touch detection. The scheme effectively reduces the occupation to display area periphery space, significantly reduces the width of equipment frame, realizes the effect of narrower frame and higher screen ratio.

Description

Technical Field

[0001] This utility model relates to the field of interactive display technology, and in particular to a display device. Background Technology

[0002] In existing infrared touchscreen technology, refer to Figure 8 To detect touch location, a common approach is to surround the display screen with infrared emitters and receivers within its bezel. Specifically, this setup requires pairs of infrared emitters and receivers positioned on opposite sides of the screen, such as the top and bottom bezels, or the left and right bezels, respectively. A cross-shaped infrared grating formed between the emitters and receivers covers the entire display area. When an object blocks the light, the system analyzes the obstructed beam to pinpoint the coordinates.

[0003] However, this traditional structure has fundamental flaws. Because the infrared transmitting and receiving components must be installed as independent physical modules inside the bezel on each side of the display, this structurally mandates that sufficient space must be reserved around the display to accommodate these components and their circuit boards. This physical space directly translates into the non-display area of ​​the screen—the bezel we see. Therefore, this inherent method of placing touch functionality components around the perimeter of the display area is the root cause of the large bezels, low screen-to-body ratio, and bulky overall appearance of existing infrared touchscreen devices. This wide bezel problem caused by component layout is particularly pronounced in large-size display devices, severely hindering the development of thinner, lighter devices with higher screen-to-body ratios. Utility Model Content

[0004] The present invention provides a display device that aims to solve the technical problem of excessively wide bezels in existing infrared touch screens due to the way the infrared touch components are set.

[0005] In a first aspect, this utility model provides a display device with a defined usage surface. The device includes: a display screen, comprising a back panel and an optical film assembly, the optical film assembly being disposed on the side of the back panel facing the usage surface; an infrared emitting module, disposed between the optical film assembly and the back panel, the infrared emitting module emitting infrared light in the usage direction pointed to by the usage surface, the infrared light forming an infrared light field on the usage surface after optical path transformation by the optical module; and an infrared receiving module, disposed on the periphery of the display screen and at least partially protruding from the usage surface in the usage direction, the infrared receiving module receiving infrared light from the infrared light field at the usage surface.

[0006] In a display device according to an embodiment of the present invention, the working surface is a polygonal plane, and at least two infrared receiving modules are respectively arranged near two adjacent corners of the working surface.

[0007] In one embodiment of the display device of this utility model, the receiving module is disposed at the bottom of the display screen, and the two receiving modules are symmetrically arranged along the center of the use surface.

[0008] In a display device according to an embodiment of the present invention, the infrared receiving module includes a receiving end housing, a camera assembly, and a camera control board. The receiving end housing is installed at the bottom of the display screen, the camera control board is disposed inside the receiving end housing, and the camera assembly is installed on the outside of the receiving end housing on the side away from the center of the use surface. The camera assembly is electrically connected to the camera control board.

[0009] In a display device according to an embodiment of the present invention, a usage direction is defined. The infrared receiving module further includes a camera mounting part, which is disposed at the center away from the usage surface. The camera assembly includes a camera cover and a camera sensor. The camera cover is disposed on the side of the camera mounting part near the usage surface. The end of the camera cover near the usage direction is closer to the usage direction than the usage surface. The camera sensor is disposed inside the camera cover and near the end near the usage direction. The side of the camera cover near the center of the usage surface is transparent.

[0010] In a display device according to an embodiment of the present invention, the outer surface of the camera cover near the side of the display screen is coplanar with the side of the display screen, and the outer surface of the camera cover near the bottom surface of the receiver housing is coplanar with the bottom surface of the receiver housing.

[0011] In one embodiment of the display device of the present invention, the display screen further includes a plurality of backlight strips arranged in an array on the side of the back panel near the use surface, and the infrared emitting module includes a plurality of infrared light sources, the infrared light sources being disposed on the backlight strips.

[0012] In one embodiment of the display device of this utility model, the bottom of the display screen is further provided with a bottom frame, and the infrared receiving module is installed on the bottom frame.

[0013] In one embodiment of the display device of the present invention, a front panel module is further included, the front panel module being installed at the bottom of the bottom bezel.

[0014] In a display device according to an embodiment of the present invention, the front panel module includes a front panel shell, a remote control signal receiving module, and a docking port assembly. The front panel shell is installed at the bottom of the bottom frame, and the remote control signal receiving module and the docking port assembly are both located inside the front panel shell on the side close to the usable surface.

[0015] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the display device integrates an infrared emitting module between the back panel and the optical film assembly inside the display screen, and places an infrared receiving module on the periphery of the usable surface. The emitting module emits infrared light towards the usable surface, and the receiving module acquires the infrared light image of the screen area to achieve touch detection. This solution effectively reduces the space occupied around the display area, significantly reduces the width of the device bezel, and achieves a narrower bezel and a higher screen-to-body ratio. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the display device according to an embodiment of the present utility model; Figure 2 This is an exploded view of the structure of the display device according to an embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of the display device according to an embodiment of the present utility model; Figure 4 This is a top view of the display device according to an embodiment of the present utility model; Figure 5 This is a schematic diagram illustrating the working principle of the display device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the infrared receiving module of the display device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the front panel module of the display device according to an embodiment of the present invention; Figure 8 This is a schematic diagram of an infrared touchscreen structure under existing technology. Figure label explanation: 10. Surface to be used; 11. Direction of use; 20. Display screen; 21. Back panel; 22. Optical film assembly; 23. Mid-frame assembly; 24. LCD panel; 25. Bottom bezel; 26. Backlight strip; 30. Infrared receiver module; 31. Receiver housing; 32. Camera assembly; 321. Camera cover; 33. Camera control board; 34. Camera mounting part; 40. Front panel module; 41. Front panel housing; 42. Remote control signal receiving module; 43. Dating port assembly. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] This utility model addresses the technical problem of excessively wide bezels in existing infrared touchscreens due to the way the infrared touch components are arranged, and proposes a display device. (Refer to...) Figures 1 to 7 The display device defines a usage surface 10. The device includes: a display screen 20, including a back panel 21 and an optical film assembly 22, the optical film assembly 22 being disposed on the side of the back panel 21 facing the usage surface 10; an infrared emitting module, disposed between the optical film assembly 22 and the back panel 21, the infrared emitting module being used to emit infrared light in the usage direction 11 pointing to the usage surface 10, the infrared light being transformed by the optical path of the optical module to form an infrared light field on the usage surface 10; and an infrared receiving module 30, disposed on the periphery of the display screen 20 and at least partially protruding from the usage surface 10 in the usage direction 11, the infrared receiving module 30 being used to receive infrared light from the infrared light field at the usage surface 10.

[0021] The display device defines a usable surface 10 for displaying images and performing touch operations. It includes a display screen 20, which employs a layered structure design. The bottom layer is a metal backplate 21 that provides support and heat dissipation. Optical film assemblies 22 are sequentially arranged on the side facing the usable surface 10. These assemblies typically include reflective sheets, diffusion films, and brightness enhancement films, used to homogenize and enhance backlight. The optical film assembly 22 is fixed to a mid-frame assembly 23, which is connected and fixed to the backplate 21. An infrared emitting module is disposed between the optical film assembly 22 and the backplate 21, specifically integrated into a backlight strip 26. In this embodiment, the backlight strip 26 simultaneously arranges white LEDs for illumination and infrared LEDs for touch detection. During operation, the light emitted by the infrared LEDs is reflected by the backplate 21, passes through the reflective sheet and the optical film assembly 22, and is uniformly emitted from the usable surface 10, forming a two-dimensional infrared light field in front of the screen. An infrared receiving module 30 is disposed around the periphery of the usable surface 10, preferably located at the bottom of the display screen 20. In this embodiment, two infrared receiving modules 30 are used, respectively installed on the bottom left and right sides. Each receiving module includes a CMOS image sensor with a narrowband filter and corresponding processing circuitry, which continuously observe the infrared image of the entire screen area. When a user touches the screen, the touch point blocks the infrared light, forming a shadow in the image of the receiving module. By analyzing the position information of this shadow, the system can calculate the precise touch coordinates, thereby realizing the touch function.

[0022] In one embodiment, the working surface 10 is a polygonal plane, and at least two infrared receiving modules 30 are respectively positioned near two adjacent corners of the working surface 10.

[0023] The surface 10 is a rectangular plane, a type of polygonal plane. The two infrared receiving modules 30 are no longer distributed around the four sides, but are instead centrally located. Specifically, these two infrared receiving modules 30 are positioned near two adjacent corners at the bottom of the surface 10, namely the lower left and lower right corners. This arrangement has significant advantages. By concentrating the receiving modules at the bottom of the screen, the infrared touch bezels on the top, left, and right sides can be completely eliminated, leaving only a narrow area at the bottom for installation, thus greatly narrowing the overall bezel. Secondly, placing the receiving modules at adjacent corners provides the widest possible field of view, allowing unobstructed observation of most of the screen area, especially with more complete diagonal coverage. In the display device of this embodiment, by installing the receiving modules on the bottom left and right sides, it is ensured that the camera's field of view completely covers the entire screen area from its installation position to the opposite upper corner. This layout based on bi-angular symmetry provides a good geometric foundation for subsequent accurate two-dimensional coordinate (X,Y) calculation using binocular vision or image difference algorithms, while avoiding image distortion or blind spots in the central area that may occur due to the receiving module being located in the middle of the long side.

[0024] In one embodiment, the receiving module is located at the bottom of the display screen 20, and the two receiving modules are symmetrically arranged along the center of the use surface 10.

[0025] Both receiving modules are mounted on the bottom bezel area of ​​the display screen 20, and they are strictly centrally symmetrical with respect to the center point of the use surface 10. This means that if an axis is drawn through the center of the use surface 10 and extends horizontally, the two receiving modules will be located on the left and right sides of the axis, respectively, and at exactly the same distance from the center. In the display device product of this embodiment, this symmetrical layout is achieved by precisely machining two sets of perfectly mirrored mounting holes on the bottom bezel 25 of the display screen 20. Two identical infrared receiving modules 30 are respectively secured to these symmetrical holes with screws. This centrally symmetrical arrangement ensures that the geometric relationship between the two cameras and the screen is completely consistent, thereby enabling the acquisition of highly symmetrical and comparable infrared images. This not only greatly simplifies the complexity of subsequent image processing algorithms, making accurate touch point identification through image difference method efficient and feasible, but also effectively avoids touch coordinate calculation deviations and poor linearity caused by layout asymmetry, significantly improving the accuracy of touch positioning and the consistency of the overall interactive experience.

[0026] In one embodiment, the infrared receiving module 30 includes a receiving housing 31, a camera assembly 32, and a camera control board 33. The receiving housing 31 is installed at the bottom of the display screen 20, the camera control board 33 is disposed inside the receiving housing 31, and the camera assembly 32 is installed on the outside of the receiving housing 31 on the side away from the center of the use surface 10. The camera assembly 32 is electrically connected to the camera control board 33.

[0027] The receiving module mainly consists of three parts: a receiver housing 31, a camera assembly 32, and a camera control board 33. In practice, the receiver housing 31 is first securely mounted to the bottom bezel 25 of the display screen 20 using screws to ensure mechanical stability. The camera control board 33 is placed inside the cavity of the receiver housing 31 and fixed using clips or screws. The camera assembly 32 is mounted on the outside of the receiver housing 31, specifically on the side of the housing away from the center of the operating surface 10, facing the side of the display screen 20, to ensure the camera has the maximum unobstructed field of view. The camera assembly 32 is electrically connected to the camera control board 33 inside the housing via a flexible circuit board or ribbon cable, allowing the raw infrared image signal captured by the camera to be transmitted to the camera control board 33. This modular, internally and externally partitioned structural design not only protects the delicate circuit board from external environmental influences but also places the photosensitive element at the front, ensuring optimal imaging performance and facilitating subsequent modular production and maintenance.

[0028] In one embodiment, a usage direction 11 is defined. The infrared receiving module 30 further includes a camera mounting portion 34, which is disposed away from the center of the usage surface 10. The camera assembly 32 includes a camera cover 321 and a camera sensor. The camera cover 321 is disposed on the side of the camera mounting portion 34 near the usage surface 10. The end of the camera cover 321 near the usage direction 11 is closer to the usage direction 11 than the usage surface 10. The camera sensor is disposed inside the camera cover 321 and is disposed near the end of the camera cover 321 near the usage direction 11. The side of the camera cover 321 near the center of the usage surface 10 is transparent.

[0029] The normal usage direction 11 of the television is defined as the usage direction 11, that is, the direction in which the screen faces the user. The infrared receiving module 30 further has a dedicated camera mounting part 34 on the receiving end housing 31. This mounting part is located away from the center of the usage surface 10, specifically pointing towards the side of the display screen 20. The camera assembly 32 includes a camera cover 321 and an internal camera sensor. The camera cover 321 is mounted on the camera mounting part 34 and is located on the side closer to the usage surface 10. Its key feature is that the camera cover 321 forms a small protrusion or beveled structure on the side closer to the usage direction 11, so that this end is spatially slightly forward of the usage surface 10 of the display screen 20, closer to the user, which helps to expand the field of view of the camera and avoid the housing itself blocking light. The camera sensor is encapsulated in the internal cavity of the camera cover 321 and positioned at the end closer to the usage direction 11 to ensure that its photosensitive surface faces the screen area, thereby obtaining the most direct and least distorted infrared light image. Meanwhile, the side of the camera cover 321 facing the center of the use surface 10, that is, the side facing the screen, is made of a transparent material such as transparent plastic or glass, and preferably has a narrow-band filter that only allows infrared light of a specific wavelength to pass through, which can effectively filter out visible light interference in the environment and ensure the signal-to-noise ratio of the image.

[0030] In one embodiment, the outer surface of the camera cover 321 near the side of the display screen 20 is coplanar with the side of the display screen 20, and the outer surface of the camera cover 321 near the bottom surface of the receiver housing 31 is coplanar with the bottom surface of the receiver housing 31.

[0031] During assembly, the camera cover 321 is precisely designed and machined to ensure that, once installed, the outer surface of the side of the camera cover 321 closest to the side of the display screen 20 (facing the side of the TV) is completely flush with the side surface of the display screen 20 itself, both lying in the same vertical plane. Simultaneously, the outer surface of the camera cover 321 closest to the bottom of the receiver housing 31 (the bottom surface) is also completely flush with the outer surface of the bottom of the receiver housing 31 itself, lying in the same horizontal plane. This coplanar design eliminates the visual abruptness and dust accumulation that could result from a protruding camera cover 321, making the bottom bezel appear smoother and more integrated. Furthermore, it ensures a clean profile on the sides and bottom of the device, without adding extra thickness or width due to the touch module, perfectly supporting the ultra-narrow bezel design concept. Ultimately, this allows the camera module to function while seamlessly integrating into the overall design of the TV, significantly enhancing the product's aesthetics and craftsmanship.

[0032] In one embodiment, the display screen 20 further includes a plurality of backlight strips 26 arranged in an array on the side of the back panel 21 near the use surface 10, and the infrared emitting module includes a plurality of infrared light sources, which are disposed on the backlight strips 26.

[0033] On the side of the metal backplate 21 closest to the usable surface 10, multiple backlight strips 26 are arranged in an array to provide uniform illumination for the LCD panel 24. An infrared emitting module includes multiple infrared light sources integrated into these backlight strips 26. Specifically, each backlight strip 26, in addition to LED chips emitting visible white light, also has LED chips emitting infrared light of specific wavelengths arranged at intervals or in sections. These infrared light sources share the same substrate as the visible light sources, are firmly bonded to the backplate 21 with silane adhesive, and are connected to the circuit traces on the backplate 21 for electrical conduction. During operation, the system can independently control the switching of the infrared light sources; during touch detection, the infrared light sources are activated. In normal display mode, they can be turned off to reduce power consumption. After infrared light is emitted, it enters the light guide plate of the backlight module or is scattered by the reflector, and then passes through the optical film components 22 such as the diffusion film and the brightness enhancement film in sequence. Finally, it is emitted from the use surface 10 together with visible light to form a uniform display image and an infrared light field covering the entire screen. In one embodiment, the bottom of the display screen 20 is also provided with a bottom bezel 25, and the infrared receiving module 30 is installed on the bottom bezel 25.

[0034] In one embodiment, the display device further includes a front panel module 40, which is mounted on the bottom of the bottom bezel 25.

[0035] The front panel module 40 is mounted on the bottom surface of the bottom frame 25. Specifically, the front panel module 40 includes a front panel housing 41, which integrates key electronic components. This module is screwed onto the bottom of the bottom frame 25 from below, securing it to pre-drilled mounting holes. The front panel module 40 is mounted parallel to and adjacent to the infrared receiving module 30, also on the bottom frame 25, but on the outermost bottom plane. This layout allows for separate or simultaneous operation of the infrared receiving module 30 and the front panel module 40 during equipment installation, production, and subsequent maintenance, without interference. This design not only concentrates multiple functions at the bottom of the equipment, maintaining a clean front appearance of the display screen 20, but also simplifies the assembly process through modular design. Each module is assembled and tested independently, ultimately integrated through a unified bottom frame 25 base, improving production efficiency and product reliability.

[0036] In one embodiment, the front panel module 40 includes a front panel housing 41, a remote control signal receiving module 42, and a docking port assembly 43. The front panel housing 41 is installed at the bottom of the bottom frame 25, and the remote control signal receiving module 42 and the docking port assembly 43 are both located inside the front panel housing 41 on the side close to the use surface 10.

[0037] The front panel module 40 is externally encapsulated and structurally supported by a plastic front panel housing 41, which is screwed to the bottom of the bottom frame 25, becoming part of the overall appearance. Inside the front panel housing 41, adjacent to its user-facing side 10, i.e., the side facing the user, are two main functional components: a remote control signal receiving module 42 and a docking port assembly 43. The remote control signal receiving module 42 is typically an infrared receiver, located in a corresponding through-hole on the front panel housing 41 to receive infrared control signals from the remote control. The docking port assembly 43 includes at least one TYPE-C interface, as well as other possible input or output ports, such as USB-A, HDMI, etc. The port bodies of these interfaces are fixed in the openings of the front panel housing 41 for the user to plug and unplug cables. The circuitry of all components is integrated onto a front processing board, which is also fixed inside the front panel housing 41. By placing these functional components inside the front panel 41 on the side close to the usage surface 10, it is ensured that the infrared receiver head can directly receive signals, and that each port can extend normally from the surface of the housing, making it convenient for users to operate.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A display device, characterized in that, The device is defined to have a usage surface and includes: The display screen includes a back panel and an optical film assembly, the optical film assembly being disposed on the side of the back panel facing the usage surface; An infrared emitting module is disposed between the optical film assembly and the back plate. The infrared emitting module is used to emit infrared light in the direction of use pointing to the use surface. After the infrared light is transformed by the optical film assembly, it forms an infrared light field on the use surface. An infrared receiving module is disposed on the periphery of the display screen and at least partially protrudes from the use surface in the direction of use. The infrared receiving module is used to receive infrared light from the infrared light field at the use surface.

2. The display device according to claim 1, characterized in that, The surface to be used is a polygonal plane, and at least two infrared receiving modules are respectively positioned near two adjacent corners of the surface to be used.

3. The display device according to claim 2, characterized in that, The receiving module is located at the bottom of the display screen, and the two receiving modules are symmetrically arranged along the center of the use surface.

4. The display device according to claim 3, characterized in that, The infrared receiving module includes a receiver housing, a camera assembly, and a camera control board. The receiver housing is installed at the bottom of the display screen, the camera control board is located inside the receiver housing, and the camera assembly is installed on the outside of the receiver housing on the side away from the center of the surface to be used. The camera assembly is electrically connected to the camera control board.

5. The display device according to claim 4, characterized in that, The infrared receiving module further includes a camera mounting part, which is located away from the center of the usage surface, and the camera assembly includes a camera cover and a camera sensor. The camera cover is located on the side of the camera mounting part near the usage surface, and the end of the camera cover near the usage direction is closer to the usage direction than the usage surface. The camera sensor is located inside the camera cover and is located near the end of the camera cover near the usage direction. The side of the camera cover near the center of the usage surface is transparent.

6. The display device according to claim 5, characterized in that, The outer surface of the camera cover near the side of the display screen is coplanar with the side of the display screen, and the outer surface of the camera cover near the bottom of the receiver housing is coplanar with the bottom of the receiver housing.

7. The display device according to claim 1, characterized in that, The display screen also includes multiple backlight strips arranged in an array on the side of the back panel near the usable surface. The infrared emitting module includes multiple infrared light sources, which are located on the backlight strips.

8. The display device according to claim 3, characterized in that, The display screen also has a bottom bezel, and the infrared receiving module is installed on the bottom bezel.

9. The display device according to claim 8, characterized in that, It also includes a front panel module, which is installed at the bottom of the bottom frame.

10. The display device according to claim 9, characterized in that, The front panel module includes a front panel housing, a remote control signal receiving module, and a docking port assembly. The front panel housing is installed at the bottom of the bottom frame, and the remote control signal receiving module and the docking port assembly are both located inside the front panel housing on the side close to the usable surface.

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