CN220872698U - Foaming diffusion plate and backlight module - Google Patents

Abstract

The utility model belongs to the technical field of backlight modules, and particularly discloses a foaming diffusion plate and a backlight module, wherein the foaming diffusion plate comprises a plate body, a plurality of microbubbles are arranged in the plate body, the microbubbles are hollow structures formed in the plate body, and an ink layer is arranged on the outer side of the plate body. The foaming diffusion plate is a foaming product with an air hole structure inside and a tough and crusted surface, and the surface is provided with the ink layer, so that the shielding property of the foaming diffusion plate is effectively improved, the transmittance of the diffusion plate is relatively low, and the OD distance of the backlight module can be reduced particularly when the foaming diffusion plate is applied to the backlight module, so that the thickness of the whole backlight module can be reduced.

Description

Foaming diffusion plate and backlight module

Technical Field

The utility model relates to the technical field of optical components, in particular to a foaming diffusion plate and a backlight module.

Background

The existing backlight module is thin, attractive, more real in visual effect, more LEDs are adopted in most cases, and better in partition effect, so that MINI LEDs are arranged, and the thickness of the backlight module is reduced by reducing the distance between the lamp beads and the OD of the plate on the premise of ensuring visual effect OK.

In the backlight module, in order to reduce the OD distance, the following scheme is generally selected:

1. The size of the LEDs is reduced and the lamp spacing of the LEDs is reduced.

2. The number of diaphragms is increased.

3. A diffusion plate with low transmittance is used.

The present application is directed to improvements in diffuser plates. In the prior art, for example, application number CN200410054945.8 discloses a diffusion plate, a method for manufacturing the diffusion plate and a direct type backlight module. The direct type backlight module is mainly composed of a lamp box, a plurality of light sources and a diffusion plate. The light sources are arranged in the lamp box in an array form to provide a surface light source. The diffusion plate is arranged in the lamp box and is positioned above the light source. The diffusion plate is dispersed with a plurality of micro bubbles for diffusing the light incident on the diffusion plate. The manufacturing method of the diffusion plate firstly provides an injection molding machine and a diffusion plate material. Next, the diffuser material is injection molded into at least one diffuser. Wherein the injection molding of the diffuser plate further comprises mixing a plurality of microbubbles in the diffuser plate material.

Although the diffusion plate in which a plurality of microbubbles are dispersed has a low transmittance, the diffusion plate has a slight insufficient shielding property, and the distance of the OD is further reduced. Therefore, how to improve the diffusion plate to improve the shielding property of the diffusion plate to reduce the OD distance and thus reduce the thickness of the backlight module is a technical problem to be solved.

Disclosure of utility model

The utility model aims to provide a foaming diffusion plate and a backlight module, which are used for reducing the distance of an Optical Density (OD).

In order to achieve the above-mentioned purpose, the present utility model provides a foaming diffusion plate and a backlight module, which adopts the following technical scheme:

The utility model aims to improve the shielding property of a diffusion plate and reduce the thickness of a backlight module by matching the structure design of inner microbubbles in the diffusion plate with an ink layer outside the diffusion plate, and particularly relates to a foaming diffusion plate.

Preferably, the aspect ratio of the microbubbles in the plate is between 2:1 and 1:1.

Preferably, the transmittance of the foaming diffusion plate is 25% -35%.

The second objective of the present utility model is to reduce the OD distance in the backlight module to reduce the thickness of the backlight module, in particular, a backlight module, comprising the above-mentioned foam diffusion plate and a plurality of light sources, wherein the light sources are arranged below the foam diffusion plate in a matrix form and provide a surface light source for the foam diffusion plate.

Preferably, the light source is an LED light assembly.

Preferably, the LED light assembly comprises a lamp holder, LED lamp beads and an arc-shaped light-transmitting plate, wherein the LED lamp beads are installed in the lamp holder, an opening is formed in the upper portion of the lamp holder and covered by the arc-shaped light-transmitting plate, and printing lattice points are arranged on the arc-shaped light-transmitting plate.

The beneficial effects of the utility model are as follows:

1. According to the foaming diffusion plate, the foaming diffusion plate is a foaming product with an air hole structure inside and a tough surface skin shape, and the surface is provided with the printing ink layer, so that the shielding property of the foaming diffusion plate is effectively improved, the transmittance of the diffusion plate is relatively low, and the OD distance of the backlight module can be reduced particularly when the foaming diffusion plate is applied to the backlight module, so that the thickness of the whole backlight module can be reduced.

2. According to the backlight module, the foam diffusion plate designed by the utility model is utilized, and the printing dots are designed above the LED lamp beads, so that the OD distance of the backlight module can be reduced to below 5mm on the premise that the LED lamp beads are unchanged from the used diaphragms, the thickness of the whole backlight module is reduced, and the aesthetic feeling of the whole backlight module is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

Fig. 1 shows a cross-sectional view of a foaming diffusion plate according to an embodiment of the present utility model.

Fig. 2 shows a structure diagram of a backlight module according to an embodiment of the present utility model.

Fig. 3 shows a block diagram of an LED light assembly of a backlight module according to an embodiment of the present utility model.

In the figure, 100 is a foaming diffusion plate, 101 is a plate body, 102 is a micro bubble, 103 is an ink layer, 200 is a light source, 201 is a lamp holder, 202 is an LED lamp bead, 203 is an arc-shaped light-transmitting plate, and 204 is a printing lattice point.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples.

Example 1:

As shown in fig. 1, the foaming diffusion plate 100 of the embodiment of the present utility model includes a plate body 101, a plurality of microbubbles 102 are disposed in the plate body 101, the microbubbles 102 are hollow structures formed in the plate body 101, and an ink layer 103 is disposed outside the plate body 101.

The foaming diffusion plate in the embodiment is formed by adding a chemical foaming agent with a certain proportion into GPPS raw materials, melting through a charging barrel of an extruder, extruding into a die, foaming the foaming agent in the plastic under the restraint of the die, and finally obtaining a foaming product with a pore structure in the plastic and a tough and skinny surface. As micro bubbles exist in the plate, when light passes through the bubbles, the refractive index of the light is improved, so that the overall shielding property of the light is improved.

In order to further improve the shielding property of the diffusion plate, a uniform layer of ink is printed on the surface of the foaming diffusion plate 100 to form the ink layer 103, so that the transmittance of the foaming diffusion plate 100 is 25% -35%. Under the condition of the transmittance, the foaming diffusion plate can be directly replaced with the diffusion plate in the existing backlight module, and the low transmittance of the foaming diffusion plate has better shielding property, so that the OD distance in the backlight module can be effectively reduced, the aim of reducing the thickness of the whole backlight module is fulfilled, and the aesthetic feeling of the whole backlight module is improved.

In some embodiments, the inventor considers that the light beads are generally arranged in a matrix shape in the backlight module, and the aspect ratio of the micro-bubbles 102 in the plate 101 is between 2:1 and 1:1 for the sake of uniform overall visual effect.

Example 2:

The embodiment of the utility model provides a backlight module, as shown in fig. 2, which includes the foaming diffusion plate 100 described in embodiment 1 and a plurality of light sources 200, wherein the light sources 200 are arranged below the foaming diffusion plate 100 in a matrix shape and provide a surface light source for the foaming diffusion plate 100.

The backlight module is formed by directly replacing the existing diffusion plate with the foaming diffusion plate designed in the embodiment 1, and the OD distance in the backlight module can be effectively reduced due to the low transmittance of the foaming diffusion plate and the better shielding property, so that the aim of reducing the thickness of the whole backlight module is fulfilled.

In some embodiments, the light source 200 is preferably an LED light assembly, that is, the backlight module is an LED module, on this basis, a targeted printing dot design can be made above the LED lamp beads, and the light source can be used in combination with the newly designed diffusion plate-foaming diffusion plate 100, so that the OD distance of the backlight module can be reduced to below 5mm on the premise that the LED lamp beads and the used film are unchanged, thereby reducing the thickness of the whole backlight module and improving the aesthetic feeling of the whole machine.

Specifically, referring to fig. 3, the LED light assembly includes a lamp holder 201, LED lamp beads 202 and an arc-shaped transparent plate 203, the LED lamp beads 202 are installed in the lamp holder 201, the opening above the lamp holder 201 is covered by the arc-shaped transparent plate 203, and printing dots 204 are disposed on the arc-shaped transparent plate 203, wherein the printing dots 204 are in a multi-point array structure.

In this embodiment, the design of the printing dots 204 adjusts the light emitting angle of the LED lamp beads 202, so that a certain proportion of light can pass through the micro bubbles 102, and the overall shielding performance is ensured.

The above embodiments are only for illustrating the present utility model, not for limiting the present utility model, and various changes and modifications may be made by one of ordinary skill in the relevant art without departing from the spirit and scope of the present utility model, and therefore, all equivalent technical solutions are also within the scope of the present utility model, and the scope of the present utility model is defined by the claims.

Claims (5)

1. The foaming diffusion plate is characterized by comprising a plate body, wherein a plurality of micro bubbles are arranged in the plate body, the micro bubbles are hollow structures formed in the plate body, and an ink layer is arranged on the outer side of the plate body;

The aspect ratio of the micro bubbles in the plate body is between 2:1 and 1:1.

2. The foam diffusion plate of claim 1, wherein the foam diffusion plate has a transmittance of 25% to 35%.

3. A backlight module comprising the foaming diffusion plate as claimed in any one of claims 1 to 2 and a plurality of light sources arranged in a matrix under the foaming diffusion plate and providing a surface light source to the foaming diffusion plate.

4. A backlight module according to claim 3, wherein the light source is an LED light assembly.

5. The backlight module of claim 4, wherein the LED light assembly comprises a lamp holder, LED beads and an arc-shaped light-transmitting plate, the LED beads are mounted in the lamp holder, the opening above the lamp holder is covered by the arc-shaped light-transmitting plate, and printing dots are arranged on the arc-shaped light-transmitting plate.