Backlight module capable of uniformly emitting light and display equipment

Abstract

The utility model relates to a backlight module capable of emitting light evenly and a display device, the backlight module capable of emitting light evenly comprises a diffusion film, a lamp panel arranged below the diffusion film and a plurality of light-emitting units arranged on the lamp panel in a matrix mode, and the diffusion film comprises an upper surface and a lower surface which are arranged back to back. The upper surface and / or the lower surface are / is provided with a silk-screen area corresponding to each light-emitting unit in position, a plurality of dotted printing ink is arranged in the silk-screen area in a silk-screen mode, and the density of the printing ink is gradually reduced or gradually increased from the center of the silk-screen area to the periphery of the silk-screen area. The silk-screen area is arranged on the diffusion film, and a plurality of dotted printing inks are printed in the silk-screen area in a silk-screen manner, so that fine regulation and uniform diffusion of light rays are realized. Meanwhile, by adjusting the density distribution of the ink, the light distribution and the brightness uniformity can be further optimized, so that the display effect and the user experience are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to a backlight module and a display device with uniform light emission. Background Art

[0002] Existing backlight modules typically consist of a backplane, multiple LED lights arranged in an array on the backplane, and a diffusion film positioned above the LED lights. Light from the LED lights is directed toward the diffusion film, which disperses and diffuses the backlight light, allowing it to more evenly illuminate the display panel, thereby improving visual quality and brightness. However, due to the inherent characteristics of the LED lights, the light directed toward the diffusion film exhibits varying degrees of brightness. This results in significant variations in the brightness and uniformity of the light received by the diffusion film, impacting the backlight module's image quality. Utility Model Content

[0003] The purpose of this utility model is to provide a backlight module and display device with uniform light emission. The backlight module achieves fine control and uniform diffusion of light by providing a silk-screen area on a diffusion film and printing multiple dots of ink within the silk-screen area. Furthermore, by adjusting the density distribution of the ink, light distribution and brightness uniformity can be further optimized, thereby improving display quality and user experience.

[0004] A backlight module with uniform light emission includes a diffusion film, a light board arranged below the diffusion film, and a plurality of light-emitting units arranged in a matrix on the light board. The diffusion film includes an upper surface and a lower surface arranged opposite to each other. The upper surface and / or the lower surface are provided with a silk-screen area corresponding to the position of each light-emitting unit. The silk-screen area is silk-screened with multiple dots of ink, and the density of the ink gradually becomes sparse or dense from the center of the silk-screen area to the surrounding area.

[0005] In the above technical solution, by setting silk-screen areas corresponding to the light-emitting units on the upper surface and / or lower surface of the diffusion film, and printing in the form of dot-shaped ink in these silk-screen areas, the density of the ink gradually changes (sparse or dense) from the center of the silk-screen area to the surrounding areas. This design effectively adjusts the distribution of light on the diffusion film. When the light emitted by the light-emitting unit passes through these ink dots, it will be scattered and diffused, thereby reducing the light spots and uneven brightness caused by direct light exposure, making the light emitted by the entire backlight module more uniform. The utility model sets a silk-screen area on the diffusion film and silk-screens a plurality of dot-shaped inks in the silk-screen area to achieve fine control and uniform diffusion of light. At the same time, by adjusting the density distribution of the ink, the light distribution and brightness uniformity can be further optimized, thereby improving the display effect and user experience.

[0006] Furthermore, there is a gap between two adjacent silk-screen printing areas.

[0007] In the above technical solution, the design of the gap ensures that the ink dots in two adjacent silk-screen printing areas will not overlap or be too close to each other, thereby avoiding light overlap or mutual interference caused by too dense ink dots, helping to maintain the independence and clarity of the light in the corresponding area of each light-emitting unit, and reducing the problems of uneven brightness or color distortion caused by light overlap.

[0008] Furthermore, the ink is off-white ink.

[0009] In the above-mentioned technical solution, the off-white ink has excellent light-scattering properties. When light passes through the ink layer, the tiny particles in the off-white ink reflect and scatter the light multiple times, making the light distribution more uniform across the diffuser film. This scattering effect helps reduce the spot and uneven brightness caused by direct light exposure, and improves the overall softness and uniformity of the light.

[0010] Furthermore, the ink has a diameter of 0.1 mm.

[0011] In the above technical solution, the diameter of the ink dot directly affects light transmittance. A 0.1mm diameter ink dot ensures sufficient light scattering while controlling the amount of light transmitted, avoiding excessive light concentration or dispersion. This moderate transmittance helps maintain an appropriate brightness level, ensuring a clear and comfortable display.

[0012] Furthermore, the thickness of the ink is less than or equal to 10 μm.

[0013] In the above technical solution, the thinner ink layer can reduce light loss during propagation and improve light utilization. In electronic products pursuing ultra-thin designs (such as smartphones and tablets), the thinner ink layer helps reduce the overall thickness of the backlight module, thereby meeting product design requirements.

[0014] Furthermore, the shape of the silk-screen area is one of circular, rectangular, or triangular.

[0015] The above technical solution offers a variety of screen printing area shapes, increasing the flexibility of backlight unit design. Manufacturers can select the most appropriate screen printing area shape based on specific application scenarios, display requirements, and product design styles. This flexibility helps meet the customization needs of different customers and promotes product innovation and development.

[0016] Furthermore, the distance between two adjacent light-emitting units is the same.

[0017] In the above technical solution, the equidistant arrangement of the light-emitting units ensures that the light emitted by the backlight module is more evenly distributed across all areas. Because each light-emitting unit is spaced uniformly from its neighbors, the light emitted by them diffuses and mixes to more uniformly cover the entire backlight area, reducing brightness unevenness and light spots.

[0018] A display device comprises the above-mentioned backlight module with uniform light emission.

[0019] In this technical solution, the backlight module's uniform light emission allows the display device to present clearer, more detailed, and more color-accurate images. Whether it's high-brightness scenes or low-brightness details, they can be accurately reproduced, providing users with an immersive visual experience.

[0020] Compared with existing technologies, the present invention offers the following advantages: by providing a silk-screen area on the diffusion film and printing multiple dots of ink within the area, light can be finely controlled and evenly diffused. Furthermore, by adjusting the density distribution of the ink, light distribution and brightness uniformity can be further optimized, thereby enhancing display quality and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic cross-sectional view of a backlight module with uniform light emission according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the ink gradually becoming thinner according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the ink gradually becoming denser according to an embodiment of the present invention.

[0024] Explanation of Figure Numbers

[0025] 1. Diffusion film; 101. Silk screen printing area; 1011. Ink; 102. Gap;

[0026] 2. Light board; 3. Lighting unit; 4. Iron frame. DETAILED DESCRIPTION

[0027] The following will further describe the uniformly luminous backlight module of the present invention in detail with reference to specific embodiments and accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0028] Please refer to Figures 1 to 3In a preferred embodiment, the backlight module with uniform light emission of the present invention includes a backlight module with uniform light emission, including a diffusion film 1, a lamp board 2 arranged below the diffusion film 1, and a plurality of light-emitting units 3 arranged in a matrix on the lamp board 2, the lamp board 2 is arranged at the bottom of the iron frame 4, and the diffusion film 1 is correspondingly arranged above the lamp board 2, the diffusion film 1 includes an upper surface and a lower surface arranged opposite to each other, and a silk-screen area 101 is provided on the upper surface and / or the lower surface corresponding to the position of each light-emitting unit 3, and a plurality of dot-shaped inks 1011 are silk-screened in the silk-screen area 101, and the density of the ink 1011 gradually becomes sparse or dense from the center of the silk-screen area 101 to the surrounding area.

[0029] In one embodiment, the light-emitting unit 3 utilizes a narrow-angle lamp (such as a spotlight) with a typically narrow beam angle, meaning the light is primarily concentrated within a relatively small area. This design results in a very bright center portion of the lamp, as the majority of the light is directed there. However, as the light diffuses outward, the limited beam angle gradually weakens, resulting in a relatively darker surrounding area. The density of the ink 1011 is designed to gradually decrease from the center of the screen printing area 101 outward, in conjunction with the narrow-angle lamp, to achieve uniform light diffusion.

[0030] In another embodiment, the light-emitting unit 3 uses a wide-angle lamp. Large-angle lamps typically have a wider beam angle, which means that the light can be dispersed over a wider area. Due to the light dispersion, the center of the lamp may not be as bright as a narrow-angle lamp. In this case, the density of ink 1011 is designed to gradually increase from the center of the screen printing area 101 to the surrounding area, in order to cooperate with the wide-angle lamp to achieve uniform light diffusion.

[0031] In practical applications, the above structure provides screen-printed areas 101 corresponding to the light-emitting units 3 on the upper and / or lower surfaces of the diffuser film 1. Dots of ink 1011 are printed within these screen-printed areas 101. The density of the ink 1011 gradually changes (from sparse to dense) from the center of the screen-printed area 101 toward the periphery. This design effectively adjusts the distribution of light on the diffuser film 1. Light emitted by the light-emitting units 3 is scattered and diffused as it passes through these ink dots 1011, thereby reducing the spotlight and uneven brightness caused by direct light exposure and making the light emitted by the entire backlight module more uniform. The present invention achieves fine control and uniform diffusion of light by providing screen-printed areas 101 on the diffuser film 1 and printing multiple dots of ink 1011 within these areas. Furthermore, by adjusting the density distribution of the ink 1011, light distribution and brightness uniformity can be further optimized, thereby enhancing the display effect and user experience.

[0032] Please refer to Figure 2 and Figure 3, there is a gap 102 between two adjacent silk-screen areas 101. The design of the gap 102 ensures that the ink dots 1011 in the two adjacent silk-screen areas 101 do not overlap or get too close to each other, thereby avoiding light overlap or mutual interference caused by the ink dots 1011 being too dense, helping to maintain the independence and clarity of the light in the corresponding area of each light-emitting unit 3, and reducing the problems of uneven brightness or color distortion caused by overlapping light. At the same time, the gap 1011 provides space for further diffusion of light. When light is emitted from the light-emitting unit 3 and passes through the silk-screen area 101, the ink dots 1011 will scatter and diffuse it. The gap 102 allows these scattered lights to be distributed over a wider area, thereby achieving a more uniform and softer lighting effect.

[0033] It should be noted that the ink 1011 of this embodiment is an off-white ink. Off-white ink has good light scattering properties. When light passes through the ink layer, the tiny particles in the off-white ink will reflect and scatter the light multiple times, making the light distribution on the diffusion film 1 more uniform. This scattering effect helps to reduce the light spots and uneven brightness caused by direct light exposure, and improves the softness and uniformity of the overall light. In addition, due to the scattering effect and brightness adjustment ability of the off-white ink, the light emitted by the backlight module is softer and less dazzling. This is especially important for users who use display devices for a long time, as it can reduce eye fatigue and discomfort and improve visual comfort.

[0034] Furthermore, the diameter of ink 1011 is 0.1 mm. The diameter of the ink dot directly affects light transmittance. A 0.1 mm diameter ink dot ensures sufficient light scattering while controlling the amount of light transmitted, preventing excessive light concentration or dispersion. This moderate transmittance helps maintain an appropriate brightness level, ensuring a clear and comfortable display.

[0035] Furthermore, the thickness of ink 1011 is less than or equal to 10 μm. A thinner ink layer can reduce light loss during propagation and improve light utilization. In electronic products pursuing ultra-thin designs (such as smartphones and tablets), a thinner ink layer helps reduce the overall thickness of the backlight module, thereby meeting product design requirements.

[0036] It should be noted that the shape of the silk-screen area 101 is one of circular, rectangular, or triangular. Providing a variety of silk-screen area shapes to choose from increases the flexibility of the backlight module design. Manufacturers can choose the most suitable shape of the silk-screen area according to the specific application scenario, display requirements and product design style. This flexibility helps to meet the customization needs of different customers and promotes product innovation and development. Regardless of whether the silk-screen area 101 is circular, rectangular or triangular, its shape can help achieve uniform distribution of light to a certain extent. Through reasonable layout and density adjustment, these shapes of silk-screen areas 101 can effectively scatter and diffuse light, reduce the phenomenon of light spots and uneven brightness, and improve the overall uniformity of light.

[0037] Please refer to Figure 1 , the distance between two adjacent light-emitting units 3 is the same. Equidistantly arranged light-emitting units 3 ensure that the light emitted by the backlight module is more evenly distributed across all areas. Because each light-emitting unit 3 is spaced uniformly from its neighbors, the light emitted by them diffuses and mixes more uniformly across the entire backlight area, reducing brightness unevenness and light spots.

[0038] The present invention also provides a display device comprising the aforementioned uniformly emitting backlight module. Due to the uniform emitting characteristics of the backlight module provided in this embodiment, the display device can present clearer, more detailed, and more color-accurate images. Whether it's high-brightness scenes or low-brightness details, both can be accurately reproduced, providing users with an immersive visual experience.

[0039] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] Furthermore, the terms "upper" and "lower" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Therefore, features specified as "upper" or "lower" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0041] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0042] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. A backlight module with uniform light emission, characterized in that: It includes a diffusion film, a light board arranged below the diffusion film, and a plurality of light-emitting units arranged in a matrix on the light board. The diffusion film includes an upper surface and a lower surface arranged opposite to each other. The upper surface and / or the lower surface are provided with a silk-screen area corresponding to the position of each light-emitting unit. The silk-screen area is silk-screened with multiple dots of ink, and the density of the ink gradually becomes sparse or dense from the center of the silk-screen area to the surrounding area.

2. The backlight module with uniform light emission according to claim 1, characterized in that: There is a gap between two adjacent silk-screen printing areas.

3. The backlight module with uniform light emission according to claim 1, wherein: The ink is off-white ink.

4. The backlight module with uniform light emission according to claim 1, wherein: The ink has a diameter of 0.1 mm.

5. The backlight module with uniform light emission according to claim 1, characterized in that: The thickness of the ink is less than or equal to 10 μm.

6. The backlight module with uniform light emission according to claim 1, characterized in that: The shape of the silk-screen area is one of circular, rectangular, or triangular.

7. The backlight module with uniform light emission according to claim 1, characterized in that: The distance between two adjacent light emitting units is the same.

8. A display device, characterized in that: The backlight module comprises the uniformly luminous backlight module according to any one of claims 1 to 7.

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