CN210465922U - Diffusion plate structure, direct type backlight module and display device - Google Patents

Abstract

The utility model discloses a diffuser plate structure, straight following formula backlight unit and display device when having solved the brightness enhancement piece that sets up the prism structure on the traditional diffuser plate, produce the problem of water ripple easily, its technical scheme main points are: the diffusion substrate comprises a diffusion substrate and diffusion particles arranged in the diffusion substrate, wherein a micro prism structure and a micro lens structure are arranged on the upper surface of the diffusion substrate, and the micro prism structure and the micro lens structure have different heights; the micro prism structures and the micro lens structures are sequentially arranged at intervals; the micro prism structure and the micro lens structure with different heights are arranged at the upper end of the diffusion base, so that water ripples are not easily generated when the brightness enhancement sheet with the prism structure is used.

Description

Diffusion plate structure, direct type backlight module and display device

Technical Field

The utility model relates to a liquid crystal display technology field, more specifically say, it relates to a diffuser plate structure, straight following formula backlight unit and display device.

Background

The linear back light display module includes mainly reflecting sheet, diffusing sheet, brightness enhancing sheet, diffusing sheet and other optical parts with different functions. The diffusion plate mainly has the advantages that the diffusion effect is carried out on light rays, the diffusion plate refracts, reflects and scatters the light rays through diffusion particles in the plate, the incident light rays of a light source are scattered, the backlight atomization effect is improved, and when the backlight is more uniform, the subjective visual effect of the backlight is improved. Therefore, the diffuser plate is an indispensable key component in the direct-type backlight display module.

The diffusion plate with the diffusion particles is added, when light passes through the diffusion plate, because the refractive indexes of the diffusion particles and the base material are different, light can be refracted for many times, the light is uniformly dispersed, reflected and scattered, the propagation direction of the light is adjusted, the effect of a point light source is realized, the central brightness is reduced, generally, a manufacturer needs to match one or even a plurality of brightening membranes for hard optical indexes, namely the central brightness, so that the production cost is improved, adsorption is easy to generate among the membranes, and the problems of water ripple and the like are solved.

Therefore, the prior art still needs to be improved and developed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a diffuser plate structure, straight following formula backlight unit and display device to not enough among the prior art, when reaching the brightness enhancement piece use of collocation prism structure, the difficult purpose that produces the ripple of water.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a diffusion plate structure comprises a diffusion substrate and diffusion particles arranged in the diffusion substrate, wherein the upper surface of the diffusion substrate is provided with a micro prism structure and a micro lens structure, and the micro prism structure and the micro lens structure have different heights; the micro prism structure and the micro lens structure are sequentially arranged at intervals.

The diffusion plate structure is characterized in that the lower surface of the diffusion substrate is provided with a texture structure for increasing diffusion.

The diffuser plate structure, wherein the texture structure comprises one or more of a V-shaped groove array structure, a U-shaped convex groove array structure and a circular ring array structure.

The diffuser plate structure, wherein the height of the micro prism structure is higher than the height of the micro lens structure.

The diffuser plate structure, wherein, the microprism structure is zigzag.

The diffusion plate structure, wherein the micro lens structure is arc-shaped.

The diffusion plate structure, wherein the diffusion particles are PMMA particles, PBMA particles or PET particles.

The diffusion substrate is a PMMA diffusion plate, a PS diffusion plate, a PC diffusion plate or a PP diffusion plate.

A direct type backlight module comprises the diffusion plate structure.

A display device comprises a display panel and a direct type backlight module.

To sum up, the utility model discloses following beneficial effect has:

the utility model changes the single diffusion shielding effect of the traditional diffuser plate, increases the intensifying effect, can save the brightness enhancement sheet in the small-size display equipment with low brightness requirement, and saves the cost of the backlight module; meanwhile, when the brightness enhancement sheet with the prism structure is used, water ripples are not easily generated, and the product quality is improved.

Drawings

Fig. 1 is a schematic diagram of a diffuser plate structure in the present embodiment.

In the figure: 100. a diffusion substrate; 200. diffusing the particles; 300. a flower biting structure; 400. a microprism structure; 500. a microlens structure.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

In the description of the present invention, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and "disposed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the interconnection of two elements or through the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Example (b): a diffusion plate structure, as shown in FIG. 1, comprises a diffusion substrate 100 and diffusion particles 200 disposed in the diffusion substrate 100, wherein the diffusion particles 200 are dispersed in the diffusion substrate 100. The diffusion particles 200 have a refractive index different from that of the diffusion substrate 100, and when light passes through the diffusion substrate 100, the light is continuously refracted, reflected, and scattered in two media having different refractive indexes, thereby generating an optical diffusion effect.

The upper surface of the diffusion substrate 100 is provided with a micro-prism structure 400 and a micro-lens structure 500, and the micro-prism structure 400 and the micro-lens structure 500 have different heights; the micro prism structure 400 and the micro lens structure 500 are sequentially arranged at intervals.

Specifically, the height of the micro-prism structure 400 is higher than the height of the micro-lens structure 500. The micro-prism structure 400 is saw-tooth shaped, and the micro-lens structure 500 is arc shaped.

The lower surface of the diffusion substrate 100 is provided with a textured structure 300 for increasing diffusion. The surface of the diffusion substrate 100 is provided with the flower-biting structures 300 arranged in an array, so that light rays are refracted in different directions when passing through the flower-biting structures, the traveling route of the light rays is changed, and incident light rays are sufficiently scattered. The illumination effect of softer and more uniform light is realized.

In the present embodiment, the texture structure 300 includes one or more of a V-groove array structure, a U-groove array structure and a circular array structure.

In the prior art, the upper and lower surfaces of the conventional diffusion plate are both designed to be an undercut structure, wherein the undercut structure and the diffusion particles arranged in the diffusion substrate are both diffusion functions, and incident light rays are more uniform after passing through the undercut structure and the diffusion particles on the upper and lower surfaces of the diffusion substrate.

However, the traditional diffuser plate can only play the diffusion role, and the diffuser plate structure of this application has heat resistance, dimensional stability, has good shielding nature and durability, has good light diffusion effect. Meanwhile, in the direct type backlight module, light rays do not need to be greatly diffused, and only the visual effect needs to be changed. Therefore, this application is through combining traditional diffuser plate and microprism structure, can make the diffuser plate both play the diffusion effect, play the blast effect again, is particularly useful for straight following formula backlight unit, both plays the diffusion effect, plays the blast effect again.

Specifically, the micro-prism structures 400 and the micro-lens structures 500 are spaced apart from each other on the diffusion substrate 100, so that light passing through the texture structures 300 on the lower surface of the diffusion substrate 100 and the diffusion particles 200 inside the diffusion substrate 100 is diffused, and then the light is condensed again when passing through the micro-prism structures 400 and the micro-lens structures 500 with different heights on the upper surface of the diffusion substrate 100, thereby performing a brightness enhancement function.

Therefore, the single diffusion shielding effect of the diffusion plate is changed, the brightening effect is increased, the membrane can be omitted in small-size display equipment with low brightness requirements, the use amount of the membrane can be reduced in large-size display equipment with high brightness requirements, and the cost of the backlight module is saved.

Because only the traditional diffuser plate and the microprism structure are combined, when the brightness enhancement sheet with the prism structure is used, water ripples are easily generated. The present application thus solves the above-described problems by providing a microlens structure spaced apart from the microprism structure. Simultaneously, compare in traditional diffuser plate, the visual angle of diffuser plate structure of this application is bigger.

Specifically, the diffusion substrate 100 is one of a PMMA diffusion plate, a PS diffusion plate, a PC diffusion plate, or a PP diffusion plate. The diffusion particles 200 are one or more of PMMA particles, PBMA particles, or PET particles.

The texture structure 300, the diffusion substrate 100, and the diffusion particle 200 according to the present invention are not limited to the above examples.

The utility model also provides a straight following formula backlight unit, wherein, including light guide plate, brightness enhancement film, reflectance coating, backlight and as above the diffuser plate structure, the diffuser plate structure specifically as above.

The utility model also provides a display device, display device includes display panel and as above straight following formula backlight unit.

The brightness enhancement film comprises a brightness enhancement film base material and a serrated prism layer, the prism layer comprises a plurality of prism structures with different intervals and shapes, the brightness enhancement film is used in a backlight assembly structure to improve the luminous efficiency of the whole backlight system, and the brightness enhancement film is mainly used for guiding light rays emitted by a light source in the backlight assembly so as to increase the luminous efficiency.

The reflecting film is preferably a white reflecting film, specifically, the white reflecting film is made of a PET material and is attached to the PET material, and a fine concave-convex structure is arranged on the surface of the white reflecting film, so that light rays are reflected in multiple directions, and the white reflecting film specifically comprises a core layer, an upper surface layer and a lower surface layer. The white reflective film having a three-layer structure has an advantage of low density, in which an olefin-based material having a small density or a foamed material is added to the core layer to reduce the density. The surface layer is made of pure polyester materials, or inorganic particles for improving the surface gloss are added in the polyester materials to improve the reflectivity.

The light guide plate is preferably a glass light guide plate. The surface of the glass light guide plate is polished, and if fine gaps or depressions exist on the surface of the glass light guide plate, the overall structural strength of the glass light guide plate can be affected, so that the surface of the glass light guide plate is polished, the fine gaps or depressions on the surface of the glass light guide plate are prevented, and the strength of the glass light guide plate is improved.

The backlight is preferably an LED light source.

In conclusion, the diffusion shielding effect of the traditional diffusion plate is changed, the light increasing effect is increased, the brightness enhancement sheet can be omitted in the small-size display equipment with low brightness requirement, the cost of the backlight module is saved, the assembling procedures are reduced, and the labor cost is reduced.

Meanwhile, when the brightness enhancement sheet with the prism structure is used, water ripples are not easily generated, the product quality is improved, and the development of lightness and thinness of a television is facilitated.

It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (10)

1. A diffuser plate structure, characterized by: the diffusion substrate comprises a diffusion substrate and diffusion particles arranged in the diffusion substrate, wherein a micro prism structure and a micro lens structure are arranged on the upper surface of the diffusion substrate, and the micro prism structure and the micro lens structure have different heights; the micro prism structure and the micro lens structure are sequentially arranged at intervals.

2. The diffuser plate structure of claim 1 wherein: the lower surface of the diffusion substrate is provided with a texture structure.

3. The diffuser plate structure of claim 2 wherein: the flower-biting structure comprises one or more of a V-shaped groove array structure, a U-shaped convex groove array structure and a circular ring array structure.

4. The diffuser plate structure of claim 1 wherein: the height of the micro prism structure is higher than that of the micro lens structure.

5. The diffuser plate structure of claim 1 wherein: the microprism structure is saw-toothed.

6. The diffuser plate structure of claim 1 wherein: the micro-lens structure is arc-shaped.

7. The diffuser plate structure of claim 1 wherein: the diffusion particles are PMMA particles, PBMA particles or PET particles.

8. The diffuser plate structure of claim 1 wherein: the diffusion substrate is a PMMA diffusion plate, a PS diffusion plate, a PC diffusion plate or a PP diffusion plate.

9. The utility model provides a straight following formula backlight unit, characterized by: comprising a diffuser plate structure according to any of claims 1-8.

10. A display device is characterized in that: the display device comprises a display panel and the direct type backlight module as claimed in claim 9.

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