Backlight module for improving brightness and image quality

Abstract

The utility model discloses a backlight module capable of improving brightness and image quality, and relates to the technical field of backlight modules, the backlight module comprises a main body back plate, the periphery of the upper end of the main body back plate is provided with an upward protective folding edge, the upper end of the main body back plate is fixedly provided with a backlight reflector plate, the upper end of the backlight reflector plate is provided with a light guide plate, and the light guide plate is provided with a light source. A light bar assembly is fixedly installed on the inner side of a folded edge at the upper end of the main body back plate, a plurality of optical films are arranged at the upper end of the light guide plate, supporting middle frames are arranged on the peripheries of the upper ends of the optical films, an LCD display screen is arranged at the upper ends of the supporting middle frames, an upper cover frame covers the upper end of the LCD display screen, and the lower cover frame covers the lower end of the LCD display screen. The upper cover frame is sleeved on the periphery of the folded edge of the main body back plate; according to the utility model, by adopting the technical means of combining the high-reflection coating with the rhombic microstructure, the lighting effect of the backlight module is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of backlight module technology, specifically to a backlight module that improves brightness and image quality. Background Technology

[0002] In the field of modern display technology, the backlight module is a key component of display devices such as liquid crystal displays (LCDs), and its performance directly determines the brightness, image quality, and overall visual effect of the display device. Traditional backlight modules mostly adopt a side-lit lamp strip design (also known as edge-lit backlight). This design arranges light sources on the side of the display panel and uses a light guide plate to evenly guide the light to the entire display area. However, the side-lit lamp strip solution has inherent limitations, especially in improving overall brightness and image quality, where it faces significant challenges.

[0003] Specifically, because the light source in a side-lit LED strip design is positioned to one side, the light undergoes multiple reflections and refractions during propagation, resulting in some light loss during transmission and thus relatively lower overall brightness. Furthermore, this design often struggles to achieve high brightness while maintaining a highly uniform backlight distribution, especially in large-size or high-resolution displays where insufficient brightness is particularly pronounced. Additionally, the side-lit LED strip design does not perform as well in terms of image quality as a direct-lit backlight design, which achieves a more uniform and delicate light distribution by placing numerous light sources directly behind the display panel, thus providing a superior image experience.

[0004] To improve the brightness of side-emitting LED strip solutions, the industry has attempted to enhance light reflection and focusing by adding high-cost top-mounted brightness enhancement films. However, this approach not only increases the manufacturing cost of the backlight module but may also negatively impact the overall thickness and weight of the module, hindering the design of thinner and lighter display devices. Utility Model Content

[0005] The purpose of this invention is to provide a backlight module that improves brightness and image quality, and to solve the technical problem that the overall brightness of the side-lit backlight strip is low and the image quality is not as good as that of the direct-lit backlight.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A backlight module for improving brightness and image quality includes a main back plate. The upper perimeter of the main back plate has upward-facing protective folds. A backlight reflector is fixedly mounted on the upper end of the main back plate. A light guide plate is positioned above the backlight reflector. A light strip assembly is fixedly mounted inside the upper fold of the main back plate. Multiple optical films are positioned above the light guide plate. A supporting frame is positioned around the upper perimeter of each optical film. An LCD display screen is positioned above the supporting frame. A top cover frame covers the upper end of the LCD display screen and fits around the outer perimeter of the fold of the main back plate.

[0008] Preferably, the upper end of the upper cover frame is provided with a light-transmitting hole for a light-transmitting LCD display screen, and the outer periphery of the upper cover frame is provided with a vertically downward sliding enclosure that slides and fits against the folded edge of the main body back panel.

[0009] Preferably, the backlight reflector includes a reflector carrier disposed at the bottom, and the upper surface of the reflector carrier is provided with a reflective coating.

[0010] Preferably, the upper end of the reflective sheet carrier is provided with a rhombic micro-junction array, and the reflective coating covers the rhombic micro-junction array.

[0011] Preferably, the reflective coating is applied to the upper surface of the reflective substrate by chemical spraying or vacuum coating.

[0012] Preferably, the reflective coating includes a first auxiliary layer, a high-reflectivity silver layer, and a second auxiliary layer. The first auxiliary layer is located on the upper surface of the reflective substrate and is a NiCr-SiAl compound. The high-reflectivity silver layer is located above the first auxiliary layer and is a silver film with a purity ≥3N. The second auxiliary layer is disposed above the high-reflectivity silver layer and is a Cr-SiAl compound.

[0013] Preferably, the light strip assembly includes a light strip back plate that is attached to the inner side of the folded edge of the main body back plate, and a mounting base plate for locking and installing the light strip assembly is fixedly provided at the lower end of the light strip back plate. A plurality of LED beads are evenly installed on the light strip back plate.

[0014] Preferably, the optical film is one or more combinations of a brightness enhancement film, a diffusion film, or a composite film.

[0015] Preferably, the supporting frame is an L-shaped structural plate, with the vertical L-shaped structural plate attached to the inner wall of the folded edge of the main back plate, and the horizontal L-shaped structural plate pressed onto the upper end of the optical film.

[0016] Preferably, the light reflectivity of the backlight reflector is 98% or higher.

[0017] The beneficial effects of this utility model are:

[0018] (1) By adopting a high-reflection coating combined with a rhombus microstructure, the light efficiency of the backlight module is significantly improved. The high-reflection coating can effectively reflect light and reduce light loss during transmission; while the rhombus microstructure, through its unique geometry, further optimizes the light propagation path, enabling the light to be distributed more evenly and efficiently to the entire display area, reducing the problem of insufficient brightness in traditional edge-lit backlights, and eliminating the need to rely on high-cost brightness enhancement films.

[0019] (2) The reflective coating is achieved through chemical spraying or vacuum coating processes, which are mature and controllable; the multi-layer auxiliary layer design extends the life of the reflective sheet and reduces maintenance costs.

[0020] (3) The modular design of the supporting middle frame and the top cover frame is adapted to different sizes of LCD screens (70), while enhancing the impact resistance and dustproof performance. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of a backlight module for improving brightness and image quality according to this utility model;

[0023] Figure 2 This is a schematic diagram of the backlight reflector structure of a backlight module for improving brightness and image quality according to this utility model.

[0024] In the diagram: 10. Main backplate; 20. Backlight reflector; 21. Reflector carrier; 22. Rhomboid micro-junction array; 23. Reflective coating; 30. Light guide plate; 40. LED strip assembly; 41. LED strip backplate; 42. Mounting base plate; 43. LED beads; 50. Optical film; 60. Support frame; 70. LCD display screen; 80. Top cover frame; 81. Light transmission hole. Detailed Implementation

[0025] 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.

[0026] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please see Figure 1-2 As shown, this utility model is a backlight module for improving brightness and image quality, including a main back plate 10. The upper part of the main back plate 10 is provided with an upward protective folded edge around its perimeter. A backlight reflector 20 is fixedly installed on the upper part of the main back plate 10. A light guide plate 30 is provided on the upper part of the backlight reflector 20. A lamp strip assembly 40 is fixedly installed on the inner side of the upper folded edge of the main back plate 10. A plurality of optical films 50 are provided on the upper part of the light guide plate 30. A supporting frame 60 is provided around the upper part of each optical film 50. An LCD display screen 70 is provided on the upper part of the supporting frame 60. An upper cover frame 80 is provided on the upper part of the LCD display screen 70. The upper cover frame 80 is fitted around the outer perimeter of the folded edge of the main back plate 10. Through reasonable layout and coordination, the brightness and image quality are improved, while ensuring the stability and durability of the structure.

[0029] In an optional embodiment, the upper end of the upper cover frame 80 is provided with a light-transmitting hole 81 for the light-transmitting LCD display screen 70, and the outer periphery of the upper cover frame 80 is provided with a vertically downward sliding enclosure that slides against the folded edge of the main body back plate 10.

[0030] It should be noted that the design of the light-transmitting hole 81 enables the LCD display screen 70 to display normally, while the design of the surrounding plate enhances the connection stability between the upper cover frame 80 and the main body back plate 10.

[0031] In an optional embodiment, the backlight reflector 20 includes a reflector carrier 21 disposed at the bottom, and the upper surface of the reflector carrier 21 is provided with a reflective coating 23.

[0032] It should be noted that the high reflectivity of the reflective coating 23 improves light utilization, thereby enhancing brightness and image quality.

[0033] In an optional embodiment, a rhomboid micro-junction array 22 is provided at the upper end of the reflective substrate 21, and the reflective coating 23 covers the rhomboid micro-junction array 22.

[0034] It should be noted that the design of the rhombic micro-junction array 22 can further optimize the reflection and distribution of light, thereby improving brightness and image quality.

[0035] In an optional embodiment, the reflective coating 23 is applied to the upper surface of the reflective carrier 21 by chemical spraying or vacuum coating.

[0036] It should be noted that both methods can ensure that the reflective coating 23 is uniformly and firmly attached to the reflective substrate 21, thereby ensuring its reflective effect.

[0037] In an optional embodiment, the reflective coating 23 includes a first auxiliary layer, a high-reflectivity silver layer, and a second auxiliary layer. The first auxiliary layer is located on the upper surface of the reflective substrate 21 and is a NiCr-SiAl compound. The high-reflectivity silver layer is located above the first auxiliary layer and is a silver film with a purity ≥3N. The second auxiliary layer is disposed above the high-reflectivity silver layer and is a Cr-SiAl compound.

[0038] It should be noted that the first auxiliary layer is 10-30nm thick and forms a concentration gradient through a co-sputtering process to enhance adhesion and oxidation resistance; the high-reflectivity silver layer is 80-120nm thick and provides core reflective performance; the second auxiliary layer is 2-5nm thick and further blocks oxygen diffusion and improves light transmittance.

[0039] In an optional embodiment, the light strip assembly 40 includes a light strip back plate 41 that is attached to the inner side of the folded edge of the main body back plate 10. The lower end of the light strip back plate 41 is fixedly provided with a mounting base plate 42 for locking and installing the light strip assembly 40. A plurality of LED beads 43 are evenly installed on the light strip back plate 41.

[0040] It should be noted that the arrangement of the light strip assembly 40 enables the LED beads 43 to emit light evenly and stably, providing a stable light source for the backlight module.

[0041] In an optional embodiment, the optical film 50 is one or more combinations of a brightness enhancement film, a diffusion film, or a composite film.

[0042] It should be noted that different types of optical films 50 can further optimize light, improving brightness and image quality.

[0043] In an optional embodiment, the supporting frame 60 is an L-shaped structural plate, with the vertical L-shaped structural plate attached to the inner wall of the folded edge of the main back plate 10, and the horizontal L-shaped structural plate pressed onto the upper end of the optical film 50.

[0044] It should be noted that the supporting frame 60 can stably support and fix the optical film 50 and the LCD display 70, ensuring the stability of the entire structure.

[0045] In an optional embodiment, the backlight reflector 20 has a light reflectivity of 98% or higher.

[0046] It should be noted that high reflectivity can further improve light utilization, thereby enhancing brightness and image quality.

[0047] The working principle of this utility model is as follows: A rhombic micro-junction array (22) is set on the surface of the reflective sheet, combined with a reflective coating 23, which increases the reflectivity to over 98% and reduces light energy loss. A high-reflectivity silver layer serves as the core reflective layer, supplemented by NiCr-SiAl and Cr-SiAl compound auxiliary layers to enhance adhesion, oxidation resistance, and light transmittance. The light emitted by the LED beads 43 in the light strip assembly 40 is evenly distributed through the light guide plate 30, and then further enhanced in brightness and eliminated in light spots by the optical film 50. The L-shaped design of the supporting frame 60 presses the optical film to prevent displacement. The upper cover frame 80 slides and fits against the main body back plate 10 to ensure sealing and reduce external interference.

[0048] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A backlight module with improved brightness and image quality, characterized in that, The back panel includes a main body back plate (10), with an upward protective folded edge around the upper end of the main body back plate (10). A backlight reflector (20) is fixedly installed on the upper end of the main body back plate (10), and a light guide plate (30) is provided on the upper end of the backlight reflector (20). A light strip assembly (40) is fixedly installed on the inner side of the upper folded edge of the main body back plate (10). A plurality of optical films (50) are provided on the upper end of the light guide plate (30). A supporting frame (60) is provided around the upper end of each optical film (50). An LCD display screen (70) is provided on the upper end of the supporting frame (60). An upper cover frame (80) is provided on the upper end of the LCD display screen (70). The upper cover frame (80) is fitted around the outer periphery of the folded edge of the main body back plate (10). The backlight reflector (20) includes a reflector carrier (21) disposed at the bottom, a reflective coating (23) disposed on the upper surface of the reflector carrier (21), a rhomboid micro-junction array (22) disposed at the upper end of the reflector carrier (21), and the reflective coating (23) covering the rhomboid micro-junction array (22).

2. The backlight module of claim 1, wherein, The upper end of the upper cover frame (80) is provided with a light-transmitting hole (81) for the light-transmitting LCD display screen (70), and the outer periphery of the upper cover frame (80) is provided with a vertically downward sliding enclosure that slides against the folded edge of the main body back plate (10).

3. The backlight module of claim 1, wherein the light source is a light emitting diode (LED). The reflective coating (23) is applied to the upper surface of the reflective carrier (21) by chemical spraying or vacuum coating.

4. The backlight module of claim 3, wherein the light source is a light emitting diode (LED). The reflective coating (23) includes a first auxiliary layer, a high-reflectivity silver layer and a second auxiliary layer. The first auxiliary layer is located on the upper surface of the reflective substrate (21) and is a NiCr-SiAl compound. The high-reflectivity silver layer is located on the upper end of the first auxiliary layer and is a silver film with a purity ≥3N. The second auxiliary layer is disposed on the upper end of the high-reflectivity silver layer and is a Cr-SiAl compound.

5. The backlight module of claim 1, wherein the light source is a light emitting diode (LED). The light strip assembly (40) includes a light strip back plate (41) that is attached to the inner side of the folded edge of the main body back plate (10). The lower end of the light strip back plate (41) is fixedly provided with a mounting base plate (42) for locking and installing the light strip assembly (40). A number of LED beads (43) are evenly installed on the light strip back plate (41).

6. The backlight module of claim 1, wherein the light source is a light emitting diode (LED). The optical film (50) is one or more of a brightness enhancement film, a diffusion film, or a composite film.

7. The backlight module of claim 1, wherein the light source is a light emitting diode (LED). The supporting frame (60) is an L-shaped structural plate, and the vertical plate of the L-shaped structure is attached to the inner wall of the folded edge of the main back plate (10), and the horizontal plate of the L-shaped structure is pressed onto the upper end of the optical film (50).

8. The backlight module of claim 1, wherein the light source is a light emitting diode (LED). The light reflectivity of the backlight reflector (20) is above 98%.

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