Vehicle-mounted backlight lamp front effect processing structure, backlight module and display screen
By setting white tape and black tape between the diffusion film and the light guide plate, the problem of uneven light mixing when the size of the LED light-emitting port to the VA area in the backlight module is close is solved, and the uniform distribution of light in the VA area is achieved, thereby improving the picture quality of the display.
Patent Information
- Application Number
- CN202422787788.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-14
AI Technical Summary
In existing backlight modules, when the size of the LED light-emitting port to the VA area is close, the light mixing area is small, and it is difficult for light to be fully and evenly mixed through the light guide plate microstructure, resulting in a bright and dark phenomenon, affecting the picture quality of the display device.
A white tape and a black tape are set between the diffusion film and the light guide plate. The white tape is tightly adhered to the light guide plate to focus light, while the black tape absorbs light to control the light intensity and eliminate the bright and dark phenomenon.
By adjusting the area and position of the tape, the light can be evenly distributed in the VA area, eliminating the phenomenon of alternating bright and dark areas and improving the picture quality of the display.
Smart Images
Figure CN223413581U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of display, in particular to a vehicle-mounted backlight front effect processing structure, a backlight module and a display screen. Background Art
[0002] The backlight module is a light source located behind a liquid crystal display (LCD). Its lighting directly impacts the visual quality of the LCD module. LCDs are passive light-emitting devices; the display itself does not emit light, but is illuminated by the backlight module underneath. As a key component of an LCD, the backlight module's primary function is to provide sufficient brightness and evenly distributed light to the LCD, enabling the LCD to display images properly.
[0003] In edge-lit LED backlight modules, light from the LEDs passes through the incident surface of the light guide plate (LGP) and is then transferred to the LGP. The LGP's mesh redirects the light's path, creating a surface light source that provides the necessary illumination for the LCD panel. In edge-lit LED backlight module designs, if the pitch between the LEDs is too large, a dark area will form between the two LEDs, while a bright spot will form directly in front of the LEDs. This phenomenon can reduce brightness uniformity around the edges of displays like LCD TVs, impacting overall image quality.
[0004] In ordinary conventional backlight modules, the distance between the LED light-emitting port and the VA area (visible area) is relatively far, and the light mixing area is wide. After the light passes through the microstructure of the light guide plate, the light is fully mixed, and the bright and dark phenomenon cannot be observed in the VA.
[0005] However, when the LED light source is close to the VA area, the light mixing area is small, and even light mixing is difficult to achieve through the light guide plate's microstructure. This can easily lead to bright light at the light source and dark light between the lights, resulting in a bright and dark phenomenon. In this case, if the white tape on the upper surface adheres tightly to the light guide plate at the LED light source, it will concentrate light at the adhesion point, forming a strong light spot. If the white tape on the upper surface is removed and the black single-sided tape below is replaced with double-sided tape that can adhere to the light guide plate, it will absorb light at the adhesion point, resulting in a significant loss of brightness. The area between the LEDs also appears darker because there is no light concentration, and the backlight viewing area shows a strong shadow. Utility Model Content
[0006] In order to overcome the shortcomings of the existing technology, the utility model provides a front effect processing structure of a vehicle-mounted backlight, a backlight module and a display screen, so as to solve the problem in the existing backlight that when the size of the LED light-emitting port to the VA area is relatively close, the mixed light area is small, and it is difficult for the light to be fully and evenly mixed through the light guide plate microstructure, resulting in a bright and dark phenomenon.
[0007] On the one hand, the technical solution adopted by the present invention to solve its technical problem is:
[0008] A vehicle-mounted backlight front effect processing structure includes multiple LED lamp beads and a diffusion film, a light guide plate and a reflective film arranged in sequence. The LED lamp beads are arranged opposite to the side of the light guide plate. It is characterized in that: on the side close to the LED lamp beads, a single-sided tape is provided on the diffusion film, and a surface white tape and a surface black tape are provided between the reflective film and the light guide plate. The surface black tape is provided on the reflective film, and the surface white tape is provided between the light guide plate and the surface black tape, and the area of the surface white tape is smaller than the area of the surface black tape. There are multiple surface white tapes, and the multiple surface white tapes are staggered with the multiple LED lamp beads.
[0009] As a further improvement of the above technical solution, the black tape on the surface is in the shape of a long strip, and the white tape on the surface is in the shape of a block.
[0010] As a further improvement of the above technical solution, the surface black tape is a surface black single-sided tape, one surface of the surface black single-sided tape is an adhesive surface, and the other surface of the surface black single-sided tape is a non-stick surface, and the adhesive surface of the surface black single-sided tape is bonded to the reflective film.
[0011] As a further improvement of the above technical solution, the surface white tape is a surface white double-sided tape, one side of the surface white double-sided tape is pasted on the light guide plate, and the other side of the surface white double-sided tape is pasted on the surface black tape.
[0012] As a further improvement of the above technical solution, the width of the black single-sided tape on the surface is greater than the width of the white double-sided tape on the surface.
[0013] As a further improvement of the above technical solution, the surface black tape is a surface black double-sided tape, the upper and lower surfaces of the surface black double-sided tape are both adhesive surfaces, the upper surface of the surface black double-sided tape is bonded to the light guide plate, and the lower surface of the surface black double-sided tape is bonded to the reflective film.
[0014] On the other hand, the present invention also provides the following technical solutions:
[0015] A backlight module comprises the vehicle-mounted backlight front effect processing structure.
[0016] As a further improvement of the above technical solution, the vehicle-mounted backlight front effect processing structure is accommodated in a back panel, and the LED lamp beads are installed on the back panel through a circuit board.
[0017] As a further improvement of the above technical solution, a brightness enhancement sheet is provided on the diffusion film, and the brightness enhancement sheet includes a lower brightness enhancement sheet and an upper brightness enhancement sheet that are overlapped, and the lower brightness enhancement sheet is connected to the diffusion film.
[0018] On the other hand, the present invention also provides the following technical solutions:
[0019] A display screen comprises the backlight module.
[0020] The beneficial effect of the utility model is that a black tape and a white tape are arranged in front of the lamp, the black tape absorbs light, and the white tape adheres tightly to the light guide plate to focus light, so that the light is almost consistent with the light at the position of the LED light-emitting port, eliminating the phenomenon of alternating light and dark at the lamp port. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0022] Figure 1 This is a schematic diagram of a front effect processing structure of a vehicle-mounted backlight according to an embodiment of the present utility model;
[0023] Figure 2 This is a top view of a front effect processing structure of a vehicle-mounted backlight according to an embodiment of the present utility model;
[0024] Figure 3 This is a schematic diagram of a black tape and a white tape in a front effect processing structure of a vehicle-mounted backlight according to an embodiment of the present invention;
[0025] Figure 4 This is a schematic diagram of the sizes of the black tape and the white tape in a front effect processing structure of a vehicle-mounted backlight according to an embodiment of the present invention;
[0026] Figure 5 It is a schematic diagram of a backlight module according to an embodiment of the present utility model.
[0027] Figure numerals: 1. light guide plate; 2. reflective film; 3. diffusion film; 4. LED lamp beads; 5. single-sided tape; 6. black surface tape; 7. white surface tape; 8. back plate; 9. middle iron frame; 10. circuit board; 11. lower brightening sheet; 12. upper brightening sheet. DETAILED DESCRIPTION
[0028] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. For example, fixed connection / fixed installation can be selected from screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and other methods as needed. For detachable connection, screw connection, bolt connection, threaded connection, snap connection, mortise and tenon connection, Velcro connection and other methods can be selected as needed. The various technical features in the creation of the present invention can be combined interchangeably without conflicting with each other.
[0029] Reference Figure 1-Figure 2 An embodiment of the utility model provides a vehicle-mounted backlight front effect processing structure, comprising a plurality of LED lamp beads 4 and a diffusion film 3, a light guide plate 1 and a reflective film 2 arranged in sequence, wherein the LED lamp beads 4 are arranged opposite to the side of the light guide plate 1, and a single-sided tape 5 is arranged on the side close to the LED lamp beads 4 (position in front of the lamp), a surface white tape 7 and a surface black tape 6 are arranged between the reflective film 2 and the light guide plate 1, the surface black tape 6 is arranged on the reflective film 2, the surface white tape 7 is arranged between the light guide plate 1 and the surface black tape 6, and the area of the surface white tape 7 is smaller than the area of the surface black tape 6, a plurality of the surface white tapes 7 are provided, and the plurality of the surface white tapes 7 are staggered with the plurality of LED lamp beads 4.
[0030] It can be understood that after the light is emitted by the LED lamp bead 4, it enters the light guide plate 1, and is absorbed by the black tape 6 on the surface, thereby playing a light-absorbing role. At the same time, the white tape 7 on the surface is tightly adhered to the light guide plate 1, thereby playing a focusing role. In this way, the light is almost consistent with the light at the light-emitting port of the LED lamp bead 4, eliminating the phenomenon of alternating light and dark at the lamp port.
[0031] In this embodiment, referring to Figure 2 and Figure 3 The black tape 6 on the surface is in the shape of a long strip, the white tape 7 on the surface is in the shape of a block, and the width of the black single-sided tape 5 on the surface is greater than the width of the white double-sided tape on the surface, thereby realizing the control of light absorption and light focusing, making the light mixing area uniform, that is, eliminating the phenomenon of alternating bright and dark lights at the lamp mouth.
[0032] Furthermore, the surface white tape 7 is the surface white double-sided tape, one side of the surface white double-sided tape is pasted on the light guide plate 1, and the other side of the surface white double-sided tape is pasted on the surface black tape 6, so that the surface white double-sided tape is located between the light guide plate 1 and the surface black tape 6 to ensure its focusing effect.
[0033] It is understandable that the light between the lamps is enhanced. If the light is absorbed, the black tape 6 on the surface is needed to absorb the light. If the black tape 6 on the surface is attached to the light guide plate 1, too much light will be absorbed and too much light will be lost, which will cause the overall brightness of the backlight to be seriously reduced. Therefore, it is necessary to design the lamp mouth part to absorb only the refracted light, that is, to absorb a part of the light. Through this structural design, the effect of controlling the light intensity can be achieved.
[0034] In the specific structure, the surface black tape 6 is a surface black single-sided tape 5, one surface of the surface black single-sided tape 5 is an adhesive surface, and the other surface of the surface black single-sided tape 5 is a non-stick surface. The adhesive surface of the surface black single-sided tape 5 is bonded to the reflective film 2, so that the surface black tape 6 is not bonded to the light guide plate 1 and only absorbs part of the light, thereby controlling the light intensity to make the mixed light in front of the lamp uniform.
[0035] In addition, if some products need to absorb more light in front of the lamp, and the design of not sticking the black tape 6 on the front surface of the lamp to the light guide plate still does not meet the light absorption requirements, the black single-sided tape 5 can be changed to a black double-sided tape, or a small area at the lamp mouth position can be changed to a black double-sided tape, so that it is stuck to the light guide plate 1 to absorb more light. In this way, the amount of light absorbed can be controlled by the sticking area of the surface black tape 6 and the light guide plate 1 to achieve the light control effect.
[0036] The specific adjustment method is: refer to Figure 4 The amount of light absorption is controlled by adjusting the width A of the black tape 6, and the light-collecting area is controlled by adjusting the dimensions B, C, and area S of the white tape 7. After the LED light enters the light guide plate 1, the overall light is uniform in the VA area, with no visible bright and dark spots or localized light spots.
[0037] The embodiment provided by the present invention is: Figure 5A backlight module includes a backplate 8, a center iron frame 9, and the vehicle-mounted backlight front effect processing structure of the above-mentioned embodiment. The vehicle-mounted backlight front effect processing structure is housed within the backplate 8. The LED lamp beads 4 are mounted on the backplate 8 via a circuit board 10. A light-enhancing sheet is disposed on the diffusion film 3. The light-enhancing sheet includes a lower light-enhancing sheet 11 and an upper light-enhancing sheet 12, which are overlapped. The lower light-enhancing sheet 11 is connected to the diffusion film 3. The backlight module of this embodiment achieves sufficient light mixing, and no bright and dark phenomenon is observed in VA.
[0038] The present invention also provides an embodiment: a display screen comprising the backlight module of the above embodiment. The display screen of the embodiment can display images normally with high picture quality.
[0039] The above is a specific description of the preferred implementation of the present invention, but the invention of the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A front-effect processing structure for a vehicle backlight, comprising a plurality of LED lamp beads and a diffusion film, a light guide plate, and a reflective film arranged in sequence, wherein the LED lamp beads are arranged opposite to the side of the light guide plate, and characterized in that: On the side close to the LED lamp beads, a single-sided tape is provided on the diffusion film, and a surface white tape and a surface black tape are provided between the reflective film and the light guide plate. The surface black tape is provided on the reflective film, and the surface white tape is provided between the light guide plate and the surface black tape, and the area of the surface white tape is smaller than the area of the surface black tape. There are multiple surface white tapes, and the multiple surface white tapes are staggered with multiple LED lamp beads.
2. The vehicle-mounted backlight front effect processing structure according to claim 1, characterized in that: The black adhesive tape on the surface is in the shape of a long strip, and the white adhesive tape on the surface is in the shape of a block.
3. The vehicle-mounted backlight front effect processing structure according to claim 1, characterized in that: The surface black tape is a surface black single-sided tape, one surface of the surface black single-sided tape is an adhesive surface, and the other surface of the surface black single-sided tape is a non-stick surface. The adhesive surface of the surface black single-sided tape is bonded to the reflective film.
4. The vehicle-mounted backlight front effect processing structure according to claim 3, characterized in that: The surface white tape is a surface white double-sided tape, one side of the surface white double-sided tape is adhered to the light guide plate, and the other side of the surface white double-sided tape is adhered to the surface black tape.
5. The vehicle-mounted backlight front effect processing structure according to claim 4, characterized in that: The width of the black single-sided tape on the surface is greater than the width of the white double-sided tape on the surface.
6. The vehicle-mounted backlight front effect processing structure according to claim 1, characterized in that: The surface black tape is a surface black double-sided tape, and the upper and lower surfaces of the surface black double-sided tape are both adhesive surfaces. The upper surface of the surface black double-sided tape is bonded to the light guide plate, and the lower surface of the surface black double-sided tape is bonded to the reflective film.
7. A backlight module, characterized in that: The invention comprises the vehicle-mounted backlight front effect processing structure according to any one of claims 1 to 6.
8. The backlight module according to claim 7, wherein: The vehicle-mounted backlight front effect processing structure is accommodated in a back plate, and the LED lamp beads are installed on the back plate through a circuit board.
9. The backlight module according to claim 7, wherein: A brightness enhancement sheet is provided on the diffusion film. The brightness enhancement sheet comprises a lower brightness enhancement sheet and an upper brightness enhancement sheet which are overlapped. The lower brightness enhancement sheet is connected to the diffusion film.
10. A display screen, characterized in that: The backlight module comprises the backlight module according to any one of claims 7 to 9.