CN206863415U - Backlight module and display device - Google Patents

Abstract

The utility model discloses a backlight module and a display device. The backlight module includes a diffusion plate, a reflection plate and a back plate arranged in sequence, the reflection plate and the diffusion plate are connected to each other to form a receiving cavity, and a side of the back plate facing the receiving cavity is provided with The light bar assembly is provided with a light diffusing lens on one side of the light bar assembly facing the receiving cavity, one end of the light diffusing lens penetrates the reflecting plate and protrudes into the receiving cavity, and the reflecting The board includes a reflective surface facing the receiving cavity, and a black light-absorbing layer is dispersedly distributed on the reflective surface, and the distribution area of the black light-absorbing layer exceeds 90% of the area of the reflective surface. The backlight module provided by the utility model can effectively improve the display contrast.

Description

Backlight module and display device

technical field

The utility model relates to the technical field of display equipment, in particular to a backlight module and a display device.

Background technique

Nowadays, liquid crystal display has become the mainstream of display technology and is widely used in various electronic products, such as mobile phones, personal digital assistants, digital cameras, and computers. Among them, the backlight module is one of the key components that determine the display quality of liquid crystal displays. Generally speaking, the lighting sources used in the backlight module include electroluminescent light sources, light emitting diodes (LEDs) and cold cathode fluorescent lamps. Among them, LEDs are widely used in small liquid crystal display devices due to their advantages of small size, light weight and easy control.

In the related art, the high dynamic range image partition display of the liquid crystal television can be realized by adopting the direct type and the side type. The traditional side-input type realizes high dynamic range image partition display. The two light strips receive light from both sides of the light guide plate respectively. The way of light input determines that there are fewer adjustable areas. If there are N areas parallel to the direction of the light bar adjustable, the total adjustable area is at most 2*N areas. Another side-entry partition display method, which replaces one light guide plate in the side-entry type with multiple long light guide plates, and each light guide plate is irradiated by one more light bar that can be lit in multiple partitions, and finally realizes Partitioned displays in more areas, but in order to solve the shadows at the splicing of the light guide plate and the arrangement of the light bars, it requires a special modification of the back panel, which increases the difficulty of back panel processing, and cannot meet the thinning needs of today's LCD TVs.

The traditional direct-down type realizes high dynamic range image partition display. The light bar is fixed on the back panel, and the light bar can be lit in different areas. The light bar in each area corresponds to an area of the display panel, and the partition light bar is controlled by the driving circuit. Control to realize high dynamic range image partition display. In the direct type, there needs to be a certain light mixing distance from the lamp bead to the diffuser plate and diaphragm, but due to the diffusion effect of the bottom reflector, the light reflected by the diffuser plate is scattered by the reflector, and the light is transmitted to the light bar. to the area, reducing the contrast of the mod.

Therefore, it is necessary to provide a new backlight module to solve the above technical problems.

Utility model content

The main purpose of the utility model is to provide a backlight module, aiming at solving the technical problems of the existing backlight module which do not conform to the trend of thinner and thinner and have poor contrast.

In order to achieve the above purpose, the backlight module proposed by the utility model includes a diffusion plate, a reflection plate and a back plate arranged in sequence, the reflection plate and the diffusion plate are connected to each other to form a receiving cavity, and the direction of the back plate is toward the One side of the receiving cavity is provided with a light bar assembly, and the side of the light bar assembly facing the receiving cavity is provided with a light diffusion lens, one end of the light diffusion lens passes through the reflector and extends into the In the storage cavity, the reflective plate includes a reflective surface facing the storage cavity, and a black light-absorbing layer is dispersedly distributed on the reflective surface, and the distribution area of the black light-absorbing layer exceeds 90% of the area of the reflective surface. %.

Preferably, the thickness of the black light-absorbing layer ranges from 5um to 30um.

Preferably, the black light-absorbing layer includes black ink, diluent and curing agent.

Preferably, there are multiple black light-absorbing layers, and the multiple black light-absorbing layers are distributed in an array.

Preferably, the reflective surface includes a central plane and a connecting plane, one end of the light diffusion lens penetrates the central plane and protrudes into the receiving cavity, and the connecting plane extends obliquely from the central plane, And connected with the diffusion plate.

Preferably, the light bar assembly includes a light bar and a light bead, the light bar is arranged on the side of the back plate facing the receiving cavity, and the light diffusion lens is arranged on the side of the light bar facing the accommodating cavity. On one side of the receiving cavity, the lamp bead is arranged on the light bar and facing the light diffusion lens.

Preferably, the light bar is a circuit board, and the light beads are LED lights.

Preferably, the backlight module further includes supporting feet, and the light diffusion lens is supported on the light bar through the supporting feet.

Preferably, the number of the light diffusion lenses is 50-2000.

The utility model also provides a display device, which includes a display panel and the backlight module set opposite to the display panel.

In the backlight module proposed by the utility model, the reflection plate and the diffusion plate are connected to each other to form a storage cavity, and the reflection plate includes a reflective surface facing the storage cavity, and black spots are dispersedly distributed on the reflection surface. A light-absorbing layer, the distribution area of the black light-absorbing layer exceeds 90% of the area of the reflecting surface. When light enters the reflection plate from the diffusion plate, the black light-absorbing layer can absorb the light in time, preventing the light from being reflected by the reflection plate and being transmitted to the area that the light bar assembly cannot illuminate, Therefore, the contrast ratio of the backlight module is effectively improved, the display effect is improved, and the demand for thinning and thinning of the backlight module is met in the way of the direct type backlight module.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative work.

Fig. 1 is the structural representation of the backlight module provided by the utility model;

Figure 2 is an enlarged view of part A shown in Figure 1;

FIG. 3 is a top view of the reflection plate shown in FIG. 1 .

Explanation of reference numbers:

label name label name 100 Backlight module 1 Diffusion plate 2 Reflective plate 3 Backplane 4 Light bar components 5 light diffusing lens 6 black light absorbing layer 7 support feet 8 containment cavity twenty one reflective surface 41 Light 43 lamp beads 211 center plane 213 connection surface

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

In addition, in the present application, descriptions such as "first", "second" and so on are used for description purposes only, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, the terms "connection" and "fixation" should be understood in a broad sense, for example, "fixation" can be a fixed connection, a detachable connection, or an integration; It may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, and it may be an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In addition, the technical solutions of the various embodiments of the present invention can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered as the technical solution. Combination does not exist, nor is it within the scope of protection required by the utility model.

The utility model proposes a backlight module 100 .

Please refer to FIG. 1 to FIG. 3. In an embodiment of the present invention, the backlight module 100 includes a diffuser plate 1, a reflector plate 2, and a back plate 3 arranged in sequence. The reflector plate 2 and the diffuser plate 1 are connected to each other to form a receiving cavity. 8. A light bar assembly 4 is provided on the side of the back plate 3 facing the storage cavity 8, and a light diffusion lens 5 is provided on the side of the light bar assembly 4 facing the storage cavity 8, and one end of the light diffusion lens 5 penetrates the reflector 2 and extend into the receiving cavity 8, the reflecting plate 2 includes a reflective surface 21 facing the receiving cavity 8, the reflective surface 21 is scattered with a black light-absorbing layer 6, and the distribution area of the black light-absorbing layer 6 exceeds the area of the reflective surface 21 90% of.

In the backlight module 100 proposed by the present utility model, the reflection plate 2 and the diffusion plate 1 are connected to each other to form a storage cavity 8. The reflection plate 2 includes a reflection surface 21 facing the storage cavity 8, and a black light-absorbing layer is scatteredly distributed on the reflection surface 21. 6. The distribution area of the black light absorbing layer 6 exceeds 90% of the area of the reflective surface 21 . When light enters the reflection plate 2 from the diffuser plate 1, the black light-absorbing layer 6 can absorb the light in time, preventing the light from being reflected by the reflection plate 2 and being transmitted to the area where the light bar assembly 4 cannot be irradiated, thereby effectively improving the backlight. The contrast of the module 100 improves the display effect, and satisfies the requirement of thinning and thinning the backlight module 100 by means of the direct type backlight module 100 .

Wherein, the thickness of the black light-absorbing layer may range from 5 um to 30 um. In this embodiment, the thickness of the black light-absorbing layer is preferably 25 um, so as to effectively ensure the light-absorbing effect of the black light-absorbing layer 6 . Please refer to FIG. 3 again, there are multiple black light-absorbing layers 6 , and the multiple black light-absorbing layers 6 are distributed in an array, for example, in a rectangular array or a circular array. In this embodiment, the black light-absorbing layer 6 has a circular shape, which effectively ensures a reasonable distribution of the black light-absorbing layer 6 and improves the overall light-absorbing effect. Of course, in other embodiments, the black light-absorbing layer 6 may also be square, polygonal or other shapes, as long as the light-absorbing effect of the black light-absorbing layer 6 can be satisfied.

The black light-absorbing layer 6 includes black ink, diluent and curing agent, so that the light-absorbing effect of the black light-absorbing layer 6 can be ensured through reasonable distribution of materials. In this embodiment, the composition mass ratio of the black ink, the diluent and the curing agent is distributed according to an appropriate ratio, so as to further optimize the light-absorbing effect of the black light-absorbing layer 6 .

As a preferred implementation of this embodiment, NJX-8080 black ink is used as the black ink, NJX-DD is used as the diluent, and NJX-515 is used as the curing agent. The black light-absorbing materials consumed by each reflector 2 include: NJX-8080 black ink NJX-8080 is 0.3g/PCS, NJX-DD thinner NJX-DD is 0.4g/PCS, NJX-515 curing agent NJX-515 is 0.02g/PCS .

Please refer to Fig. 2 again, the light bar assembly 4 includes a light bar 41 and a lamp bead 43, the light bar 41 is arranged on the side of the back plate 3 facing the receiving cavity 8, and the light diffusion lens 5 is arranged on the side of the light bar 41 facing the receiving cavity On one side of the cavity 8 , the lamp bead 43 is disposed on the light bar 41 and disposed toward the light diffusion lens 5 . Through the reasonable combination of the light bar assembly 4 and the light diffusion lens 5 , the display effect of the backlight module 100 can be better realized. In this embodiment, the light bar 41 is a circuit board, and the light bead 43 is an LED light, so that the structures of the light bar 41 and the light bead 43 are better simplified.

Please refer to FIG. 2 again, the backlight module 100 further includes a supporting foot 7 , and the light diffusion lens 5 is supported on the light bar 41 through a supporting frame. A stable setting of the light diffusing lens 5 is thereby achieved.

Please refer to FIG. 3 again, the number of light diffusion lenses 5 is 50-2000. In this embodiment, the number of light diffusion lenses 5 is preferably 72, and the light diffusion lenses 5 are distributed on the radiation plate 2 in a manner of 12 columns and 6 rows.

Please refer to Fig. 1 and Fig. 3 again, reflective surface 21 comprises central plane 211 and connection surface 213, and one end of light diffusion lens 5 penetrates central plane 211 and stretches in the accommodation cavity 8, and connection surface 213 extends obliquely from central plane 211 and out, and connected to the diffusion plate 1, and the back plate 3 is connected to the connecting end of the diffusion plate 1 connected to the connection surface 213, so as to rationally plan the layout of the backlight module 100 and simplify the structure of the backlight module 100. In this embodiment, the black light-absorbing layer 6 is disposed on both the central plane 211 and the connecting plane 213 . Of course, in other implementations, the black light-absorbing layer 6 may only be disposed on the central plane 211 , and only needs to meet the light-absorbing requirements of the reflector 2 .

In addition, the present utility model also provides a display device, which includes a display panel and the backlight module 100 disposed opposite to the display panel. The specific structure of the backlight module 100 refers to the above-mentioned embodiments, because The backlight module 100 adopts all the technical solutions of all the above-mentioned embodiments, and therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be repeated here.

The above are only preferred embodiments of the present utility model, and are not therefore limiting the patent scope of the present utility model. Under the conception of the present utility model, the equivalent structural transformations made by using the specification of the utility model and the contents of the accompanying drawings, or directly /Indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims (10)

1. A backlight module, comprising a diffusion plate, a reflection plate and a back plate arranged in sequence, the reflection plate and the diffusion plate are connected to each other to form a receiving cavity, and one side of the back plate towards the receiving cavity A light bar assembly is provided on the side, and a light diffusion lens is provided on the side of the light bar assembly facing the receiving cavity, and one end of the light diffusing lens penetrates the reflector and extends into the receiving cavity, The reflective plate includes a reflective surface facing the housing cavity, wherein a black light-absorbing layer is dispersedly distributed on the reflective surface, and the distribution area of the black light-absorbing layer exceeds 90% of the area of the reflective surface . 2. The backlight module according to claim 1, wherein the thickness of the black light-absorbing layer ranges from 5um to 30um. 3. The backlight module according to claim 1, wherein the black light absorbing layer comprises black ink, thinner and curing agent. 4. The backlight module according to claim 1, wherein there are multiple black light-absorbing layers, and the plurality of black light-absorbing layers are arranged in an array. 5. The backlight module according to any one of claims 1-4, wherein the reflective surface includes a central plane and a connection plane, and one end of the light diffusion lens passes through the central plane and extends into the central plane. In the accommodating cavity, the connecting surface extends obliquely from the central plane and is connected to the diffuser plate. 6. The backlight module according to any one of claims 1-4, wherein the light bar assembly includes a light bar and a light bead, and the light bar is arranged on the back plate facing the receiving On one side of the cavity, the light diffusion lens is disposed on a side of the light bar facing the receiving cavity, and the lamp bead is disposed on the light bar and facing the light diffusion lens. 7. The backlight module according to claim 6, wherein the light bar is a circuit board, and the light beads are LED lights. 8 . The backlight module according to claim 6 , wherein the backlight module further comprises a supporting foot, and the light diffusion lens is supported on the light bar through the supporting foot. 9. The backlight module according to claim 6, characterized in that the number of said light diffusion lenses is 50-2000. 10. A display device, characterized by comprising a display panel and a backlight module according to any one of claims 1-9 disposed opposite to the display panel.