Backlight module capable of improving light guide performance
By creating a rectangular groove inside the reflector and embedding a light guide plate, combined with "Λ" and "V" shaped prism sheet structures, the problem of light loss in the backlight module is solved, achieving more efficient light propagation and improved display effect.
Patent Information
- Application Number
- CN202423095790.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-16
AI Technical Summary
In existing backlight modules, light is easily lost through the gaps or edges between the light guide plate and the reflector, resulting in low light utilization efficiency, insufficient brightness, and inadequate light guiding performance.
A rectangular second placement slot is opened inside the reflector, and the light guide plate is embedded in it. Combined with the "Λ" and "V" shaped prism sheet structure, the light angle distribution is optimized, lateral loss is reduced, and the light propagation efficiency and directionality are improved.
It significantly improves the optical performance of the display, provides more uniform and brighter backlight, increases the intensity of light in the vertical direction, improves the directionality and utilization efficiency of light, and enhances the display effect.
Smart Images
Figure CN223539093U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of display screen technology, and in particular to a backlight module that improves light guiding performance. Background Technology
[0002] The backlight module is a key component of an LCD display. Located at the back of the LCD, its main function is to provide a uniform light source for the LCD panel. Liquid crystals themselves do not emit light and require illumination from the backlight module to display images. A backlight module typically consists of a diffuser, prism sheet, light guide plate, and reflective sheet.
[0003] Diffuser: It has high light transmittance and is mainly used to improve viewing angle and increase the softness of light source;
[0004] Prism sheet: The core function of the prism sheet is to increase the brightness of the front of the display screen;
[0005] Light guide plate: Its main function is to guide the light emitted by the light source onto the entire LCD display panel;
[0006] Reflector: The reflector is usually placed at the bottom of the backlight module. It is mainly used to reflect the light emitted from the bottom of the light guide plate or the light source that is not scattered in the surrounding area back into the light guide plate.
[0007] However, currently, all existing reflective sheets are sheet-like, and their reflectivity mainly relies on the equipment and backlight panel. For example, in an edge-lit backlight module, the light source enters the light guide plate from the side, and the light at the edge is easily lost from the gap between the light guide plate and the reflective sheet or from the edge of the reflective sheet. This lost light cannot re-enter the light guide plate to participate in display illumination, resulting in a reduction in overall light utilization efficiency and affecting the brightness of the display. The light guiding performance is insufficient and needs to be improved. Utility Model Content
[0008] To address the shortcomings of existing technologies, this invention provides a backlight module with improved light guiding performance, solving the technical problem of insufficient light guiding performance in existing backlight modules.
[0009] To achieve the above objectives, this utility model provides the following technical solution:
[0010] A backlight module with improved light guiding performance includes a supporting back plate, which is rectangular. A first storage slot is formed inside the supporting back plate. A light guiding structure is provided inside the first storage slot. The light guiding structure includes a reflective sheet and a second storage slot. The second storage slot is rectangular and formed inside the reflective sheet. The reflective sheet is fixed to the inside of the first storage slot by adhesive bonding. A light guide plate is provided inside the second storage slot. The light guide plate is fixed to the inside of the second storage slot of the reflective sheet by adhesive bonding, and the upper surface of the light guide plate is parallel to the top of the second storage slot.
[0011] Preferably, the upper end of the light guide plate is provided with a lower diffuser sheet, the lower diffuser sheet is fixed inside the first storage groove by adhesive bonding, the lower diffuser sheet is exposed above the light guide plate, and the upper end of the lower diffuser sheet is provided with a first prism sheet, the first prism sheet is fixed inside the first storage groove by adhesive bonding.
[0012] Preferably, the upper end of the first prism sheet is provided with a second prism sheet, the second prism sheet is fixed inside the first storage slot by adhesive bonding, the first prism sheet and the second prism sheet are respectively set as "Λ" and "V" shapes, and a gap is left in a part of the area between the upper surface of the first prism sheet and the lower surface of the second prism sheet.
[0013] Preferably, the upper end of the second prism sheet is provided with an upper diffuser sheet, which is fixed to the inside of the first storage groove by adhesive bonding. The upper end of the upper diffuser sheet is provided with a liquid crystal panel, which is fixed to the inside of the first storage groove by adhesive bonding and its upper surface is parallel to the first storage groove.
[0014] Compared with existing technologies, this solution has the following advantages:
[0015] In this invention, a rectangular second placement groove is opened inside the reflective sheet, and the light guide plate is fixed inside the second placement groove of the reflective sheet by adhesive bonding, with the upper surface of the light guide plate parallel to the top of the second placement groove. This makes the light guide plate embedded inside the reflective sheet, resulting in a wrap-around installation. This reduces the leakage of light from the edge of the light guide plate, allowing more light to be confined inside the light guide plate and transmitted upward, thus improving the propagation efficiency of light in the light guide plate. This helps to provide a more uniform and brighter backlight for the LCD panel, thereby improving the light guide performance.
[0016] In this invention, by setting "Λ" and "V" shaped first and second prisms respectively between the lower and upper diffusers, when light is incident from the light guide plate towards the lower diffuser, the first prism can initially adjust and converge the angle of the relatively uniform but still slightly dispersed light transmitted from the lower diffuser. The second prism further refines and optimizes the light processed by the first prism, allowing for more precise fine-tuning of the light angle distribution and further reducing lateral light loss. Thus, the first and second prisms can provide precise and efficient control and guidance for the light, significantly improving the optical performance of the display screen, increasing the intensity of light in the vertical direction, and effectively improving the directionality of the light. Attached Figure Description
[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.
[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0019] Figure 2 This is a three-dimensional exploded view of the structure of this utility model.
[0020] Figure 3 This is an exploded view of the first prism sheet of this utility model.
[0021] Figure 4 This utility model Figure 3 Enlarged view of the structure at point A in the image;
[0022] Figure 5 This is an exploded structural diagram of the reflector connection of this utility model.
[0023] Legend: 11. Support back plate; 12. First storage slot; 13. Reflective sheet; 14. Second storage slot; 15. Lower diffuser sheet; 16. First prism sheet; 17. Second prism sheet; 18. Upper diffuser sheet; 19. LCD panel; 21. Light guide plate. Detailed Implementation
[0024] This application provides a backlight module with improved light guiding performance, effectively solving the technical problem of insufficient light guiding performance in existing backlight modules. By creating a rectangular second placement slot inside the reflective sheet, and adhesively fixing the light guide plate inside the second placement slot with its upper surface parallel to the top of the second placement slot, the light guide plate is embedded within the reflective sheet, creating a wraparound installation. This reduces light leakage from the edges of the light guide plate, confining more light within the plate and transmitting it upwards, thus improving the light propagation efficiency within the light guide plate. This helps provide a more uniform and brighter backlight for the LCD panel, thereby improving light guiding performance. Furthermore, by extending downwards... Between the diffuser plate and the upper diffuser plate, a first prism sheet and a second prism sheet are respectively arranged in the shapes of "Λ" and "V". When light shines from the light guide plate towards the lower diffuser plate, the first prism sheet can initially adjust the angle and converge the relatively uniform but still slightly dispersed light from the lower diffuser plate. The second prism sheet further refines and optimizes the light after it has been processed by the first prism sheet. It can make more precise fine adjustments to the angle distribution of the light, further reducing the lateral loss of light. Thus, the first prism sheet and the second prism sheet can provide precise and efficient control and guidance for the light, thereby significantly improving the optical performance of the display screen, increasing the intensity of light in the vertical direction, and effectively improving the directionality of the light.
[0025] Example
[0026] like Figure 1 - Figure 5 As shown, the technical solution in this application embodiment effectively solves the technical problem of insufficient light guiding performance of existing backlight modules. The overall idea is as follows:
[0027] To address the problems existing in the prior art, this utility model provides a backlight module with improved light guiding performance, including a supporting back plate 11, which is rectangular. A first storage slot 12 is provided inside the supporting back plate 11. A light guiding structure is provided inside the first storage slot 12, including a reflective sheet 13 and a second storage slot 14. The second storage slot 14 is rectangular and is provided inside the reflective sheet 13. The reflective sheet 13 is fixed inside the first storage slot 12 by adhesive bonding. A light guide plate 21 is provided inside the second storage slot 14. The light guide plate 21 is fixed inside the second storage slot 14 of the reflective sheet 13 by adhesive bonding, and the upper surface of the light guide plate 21 is parallel to the top of the second storage slot 14. A lower diffuser 15 is provided at the upper end of the light guide plate 21. The lower diffuser 15 is fixed inside the first storage slot 12 by adhesive bonding and is exposed above the light guide plate 21.
[0028] By creating a rectangular second placement slot 14 inside the reflective sheet 13, and bonding the light guide plate 21 to the second placement slot 14 of the reflective sheet 13 with the upper surface of the light guide plate 21 parallel to the top of the second placement slot 14, the light guide plate 21 is embedded inside the reflective sheet 13, making it a wrap-around installation. This reduces light leakage from the edge of the light guide plate 21, allowing more light to be confined inside the light guide plate 21 and transmitted upwards, thus improving the propagation efficiency of light in the light guide plate 21. This helps to provide a more uniform and brighter backlight for the LCD panel, thereby improving the light guide performance.
[0029] The upper end of the lower diffuser sheet 15 is provided with a first prism sheet 16, which is fixed inside the first storage slot 12 by adhesive bonding. The upper end of the first prism sheet 16 is provided with a second prism sheet 17, which is fixed inside the first storage slot 12 by adhesive bonding. The first prism sheet 16 and the second prism sheet 17 are respectively set in the shape of "Λ" and "V". A gap is left in a part of the area between the upper surface of the first prism sheet 16 and the lower surface of the second prism sheet 17. The upper end of the second prism sheet 17 is provided with an upper diffuser sheet 18, which is fixed inside the first storage slot 12 by adhesive bonding. The upper end of the upper diffuser sheet 18 is provided with a liquid crystal panel 19, which is fixed inside the first storage slot 12 by adhesive bonding and its upper surface is parallel to the first storage slot 12.
[0030] By setting "Λ" and "V" shaped first prism sheet 16 and second prism sheet 17 respectively between the lower diffuser sheet 15 and the upper diffuser sheet 18, when light shines from the light guide plate 21 towards the lower diffuser sheet 15, the first prism sheet 16 can initially adjust and converge the angle of the relatively uniform but still slightly dispersed light coming from the lower diffuser sheet 15. Its unique "Λ" and "V" shaped structure can concentrate the light in a specific direction according to its own optical refractive surface, reducing the scattering of light in the horizontal direction. At the same time, the second prism sheet 17 further refines and optimizes the light after being processed by the first prism sheet 16. It can make more precise fine-tuning of the angle distribution of the light, further reducing the lateral loss of light, and making the light more concentrated towards the liquid crystal panel 19. Moreover, the "Λ" and "V" shaped structure can form a more concentrated light when multiple sheets are combined. A complementary and synergistic optical effect is achieved. The interaction between adjacent prism sheets allows light to reach the upper diffuser 18 in a nearly parallel and uniform state after being refracted and converged by the two layers of prism sheets. The upper diffuser 18 then performs a final softening and homogenization process on these light rays, allowing the light to pass through the liquid crystal panel 19 in the most suitable state. Finally, a clear image with high brightness, high contrast, vivid colors and wide viewing angle is presented on the screen. Whether in a strong light environment or a low light environment, it can provide users with an excellent visual experience, greatly improving the practicality and viewing experience of the display screen in different usage scenarios. This allows the first prism sheet 16 and the second prism sheet 17 to provide precise and efficient control and guidance for the light, thereby significantly improving the optical performance of the display screen, increasing the intensity of light in the vertical direction and effectively improving the directionality of the light.
[0031] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A backlight module for improving light guiding performance, comprising a supporting backplate (11), wherein the supporting backplate (11) is rectangular, characterized in that, The supporting back plate (11) has a first storage slot (12) inside, and the first storage slot (12) has a light guiding structure inside. The light guiding structure includes a reflective sheet (13) and a second storage slot (14). The second storage slot (14) is rectangularly shaped and located inside the reflective sheet (13), which is fixed to the first storage slot (12) by adhesive bonding.
2. A backlight module with improved light guiding performance as described in claim 1, characterized in that, The second storage slot (14) is provided with a light guide plate (21). The light guide plate (21) is fixed inside the second storage slot (14) of the reflective sheet (13) by adhesive bonding, and the upper surface of the light guide plate (21) is parallel to the top of the second storage slot (14). The upper end of the light guide plate (21) is provided with a lower diffuser plate (15), which is fixed inside the first storage groove (12) by adhesive bonding.
3. A backlight module with improved light guiding performance as described in claim 2, characterized in that, The lower diffuser (15) is exposed above the light guide plate (21); The lower diffuser plate (15) has a first prism sheet (16) at its upper end, and the first prism sheet (16) is fixed inside the first storage groove (12) by adhesive bonding.
4. A backlight module with improved light guiding performance as described in claim 3, characterized in that, The upper end of the first prism sheet (16) is provided with a second prism sheet (17), and the second prism sheet (17) is fixed inside the first storage slot (12) by adhesive bonding. The first prism sheet (16) and the second prism sheet (17) are respectively set in the shape of "Λ" and "V".
5. A backlight module with improved light guiding performance as described in claim 4, characterized in that, A gap is left in a part of the area between the upper surface of the first prism sheet (16) and the lower surface of the second prism sheet (17).
6. A backlight module with improved light guiding performance as described in claim 5, characterized in that, The upper end of the second prism sheet (17) is provided with an upper diffuser (18), which is fixed to the inside of the first storage groove (12) by adhesive bonding. The upper diffuser plate (18) is provided with a liquid crystal panel (19) at its upper end. The liquid crystal panel (19) is fixed inside the first storage groove (12) by adhesive bonding and its upper surface is parallel to the first storage groove (12).