CN210626833U

CN210626833U - Combined reflector plate structure and backlight module thereof

Info

Publication number: CN210626833U
Application number: CN201921591057.8U
Authority: CN
Inventors: 雷栋城; 洪文生; 尤君平
Original assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Current assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-05-26
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses a modular reflector plate structure and backlight unit thereof, wherein, modular reflector plate structure includes: the dimming device comprises a main body reflector plate and a dimming part, wherein the main body reflector plate is used for performing diffuse reflection on light, the dimming part comprises a hollow structure arranged on the main body reflector plate and a plurality of auxiliary reflector plates correspondingly arranged at the hollow structure, and the auxiliary reflector plates are used for performing directional mirror reflection on the light; this application adjusts luminance the part through increasing, and the part of adjusting luminance carries out directive property reflection to light through supplementary reflector plate to adjustment light reflection direction, and increase the reflected light intensity, and then increase the luminance that shows the darker region of plane light source, make the regional transition that shows the plane light source darker and brighter even.

Description

Combined reflector plate structure and backlight module thereof

Technical Field

The utility model relates to a technical field is shaded, more specifically says, it relates to a modular reflector plate structure and backlight unit thereof.

Background

The backlight module provides a planar light source for the liquid crystal panel, and the brightness and uniformity of the light emitted by the backlight module are required to ensure the quality of the displayed image. With the development of low-cost and high-efficiency light sources of backlight technology, the number of light sources required by the backlight module is less and less, the density of the light emitting sources is reduced, the light emitting sources are farther from the edge of the plane light source, and the light intensity received by the area farther from the light emitting sources is less, so that a local dark shadow is formed.

In order to ensure that the uniformity of a plane light source and the subjective visual effect do not reduce the quality requirement, the dimming technical requirement on the backlight module is higher and higher, the backlight module mainly comprises a light source, a light-emitting surface optical membrane and a reflector plate, wherein the reflector plate plays a main role in the subjective visual effect, so the optimization design of the reflector plate becomes an important research and development direction of current manufacturers.

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

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a modular reflector plate structure and backlight unit thereof reaches the purpose that shows that the plane light source is darker and bright regional even transition.

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

the utility model provides a modular reflector plate structure, wherein, includes the main part reflector plate that is used for carrying out diffuse reflection to light and adjusts luminance the part, adjust luminance the part including setting up hollow out construction and a plurality of correspondence on the main part reflector plate set up the auxiliary reflection piece of hollow out construction department, the auxiliary reflection piece is used for carrying out the specular reflection of directive property to light.

The combined type reflector plate structure is characterized in that the main reflector plate comprises a diffuse reflection layer, the auxiliary reflector plate comprises a specular reflection layer arranged towards the main reflector plate, and the specular reflection layer reflects light according to a preset direction to adjust the light reflection direction and increase the intensity of the reflected light.

The combined reflector plate structure is characterized in that the main reflector plate is arranged on the back plate; the auxiliary reflector plate is arranged on one surface, facing the back plate, of the main reflector plate, or the auxiliary reflector plate is arranged on the back plate.

The combined reflector structure is characterized in that the hollow structure is arranged at the edge of the main reflector and comprises a plurality of through holes arranged on the main reflector; the mirror reflection layer is arranged on one surface, facing the main reflection sheet, of the auxiliary reflection sheet.

The combined reflector plate structure comprises a plurality of sequentially arranged hollow areas, wherein the hollow areas are provided with through holes with different sizes and/or spacing distances respectively, and the through holes are used for adjusting the intensity of specular reflection light of the auxiliary reflector plate.

The combined reflector plate structure is characterized in that the auxiliary reflector plate is adhered to one surface, facing the back plate, of the main reflector plate; the auxiliary reflector comprises an effective mirror reflection area corresponding to the through hole, a double-sided adhesive layer is coated outside the effective mirror reflection area, and the auxiliary reflector is adhered to the back face of the hollow structure of the main reflector through the double-sided adhesive layer.

The combined reflector plate structure is characterized in that the auxiliary reflector plate is adhered to the back plate and forms a preset included angle with the main reflector plate.

A backlight module comprises a back plate, wherein the combined type reflector plate structure is arranged in the back plate.

The backlight module is characterized in that the back plate is also provided with a light emitting source, and the main body reflector plate is provided with a plurality of installation parts for assembling the light emitting source.

The backlight module is characterized in that a diffusion plate and a diaphragm structure are further arranged in the back plate, and the diaphragm structure is arranged on one surface, far away from the combined reflector structure, of the diffusion plate.

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

the utility model discloses an increase the part of adjusting luminance, adjust luminance the part and carry out directive property reflection to light through supplementary reflector plate to adjustment light reflection direction, and increase the reflected light intensity, and then increase the luminance that shows the darker region of plane light source, make to show that the regional transition of the darker and brighter of plane light source is even.

Drawings

Fig. 1 is a schematic view of an overall structure of a first embodiment of the present invention.

Fig. 2 is a schematic view of the overall structure of the second embodiment of the present invention.

In the figure: 100. a main body reflection sheet; 110. an installation part; 200. a dimming component; 210. a hollow structure; 211. a through hole; 220. an auxiliary reflective sheet; 221. an effective specular reflection zone; 300. a back plate; 310. a diffusion plate; 320. a membrane structure; 400. a light emitting source; 500. a shadow area.

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. 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.

The first embodiment is as follows: the utility model provides a modular reflector plate structure, as shown in fig. 1, includes main part reflector plate 100 and the part 200 of adjusting luminance, main part reflector plate 100 is one or more, it is one or more to adjust luminance the part 200, main part reflector plate 100 is used for carrying out diffuse reflection to light, it includes hollow out construction 210 and a plurality of supplementary reflector plate 220 to adjust luminance the part 200, hollow out construction 210 sets up on the main part reflector plate 100, it is a plurality of supplementary reflector plate 220 corresponds the setting and is in hollow out construction 210 department, supplementary reflector plate 220 is used for carrying out the specular reflection of directive property to light.

At present, most of the traditional reflector plate designs mainly focus on the refraction angle of the side edge and the reflectivity determined by materials, and after the refraction angle and the reflectivity of the reflector plate determine parameters, the dimming technology of the reflector plate is adopted, and the uniformity of reflected light is mainly adjusted in a mode of hollowing out the reflector plate and printing ink.

The principle of reflector plate fretwork design is to punch holes in the dimming area to reduce the intensity of reflected light, dim the bright area, and enable the light intensity of the dimming area and the adjacent area to be excessively uniform.

The printing ink for the reflector plate is printed on the reflector plate by utilizing a black light absorption white reflection principle and blending black and white ink according to a certain proportion, and light absorption and reflection effects in different areas are formed by utilizing the density of the screen dots, so that bright and dark edge areas are solved. The limitation of this method is that the reflected light of the printing ink is diffuse reflection, the dimming area has no directivity, the adjustment effect on the plane light source with poor uniformity is not good, especially the corner area generated by the light source far away from the four corners is dark, which cannot be solved by the printing ink method, and the printing ink adopting the reflection sheet has no reworking property, and the production cost is high.

This application is through on the basis of traditional reflector plate, increase the supplementary reflector plate 220 that carries out directive reflection to light, supplementary reflector plate 220 installs the hollow out construction 210 department at main body reflector plate 100, hollow out construction 210 sets up on main body reflector plate 100, to treating the region of adjusting luminance, treat that the region of adjusting luminance specifically is the regional 500 of the dark shadow that shows the planar light source, through the directive specular reflection of supplementary reflector plate 220, adjust the light reflection direction and the reflected light intensity of regional 500 of shadow, thereby to regional 500 increase luminance of shadow, increase homogeneity with the luminance transition of adjacent region simultaneously, the defect and the limitation of reflector plate dimming technique among the prior art have been solved, can adjust light modulation part 200 in a flexible way according to actual need simultaneously, when reaching expectation optical effect, high durability and convenient use.

The main reflection sheet 100 includes a diffuse reflection layer, that is, the material of the surface of the main reflection sheet 100 is a diffuse reflection material. The auxiliary reflection sheet 220 includes a specular reflection layer, that is, the material of the surface of the auxiliary reflection sheet 220 is specular reflection material, the specular reflection layer faces the direction of the main reflection sheet 100, and the specular reflection layer reflects light according to a preset direction, so as to adjust the reflection direction of the light and the intensity of the reflected light.

In this embodiment, the main reflective sheet 100 is disposed on the back plate 300, and the main reflective sheet 100 is disposed on a surface of the main reflective sheet 100 facing the back plate 300.

The hollow-out structures 210 are disposed at the edge of the main reflector 100, and in other embodiments, the hollow-out structures 210 may be disposed in any region requiring dimming. Hollow out construction 210 includes a plurality of through-holes 211, and is a plurality of through-holes 211 set up on the main part reflector plate 100, the specular reflection layer sets up supplementary reflector plate 220 orientation the one side of main part reflector plate 100.

The auxiliary reflective sheet 220 is adhered to a surface of the main reflective sheet 100 facing the rear panel 300.

Specifically, the auxiliary reflective sheet 220 includes a corresponding effective specular reflection area 221 of the through hole 211, the auxiliary reflective sheet 220 is coated with a double-sided adhesive layer outside the effective specular reflection area 221, and the auxiliary reflective sheet 220 is adhered to the back of the hollow structure 210 of the main reflective sheet 100 through the double-sided adhesive layer. The double-sided tape may be replaced with any adhesive medium capable of adhering the auxiliary reflective sheet 220 to the main reflective sheet 100.

Further, the hollow structure 210 includes a plurality of hollow areas sequentially disposed, and the plurality of hollow areas are respectively disposed with the through holes 211 having different sizes and/or spacing distances, so as to adjust the intensity of the specular reflection light of the auxiliary reflection sheet 220. The hollow areas are arranged in a partitioned mode according to actual design requirements, and are not limited in the embodiment.

Specifically, the auxiliary reflective sheet 220 is correspondingly disposed at the hollow area, and the auxiliary reflective sheet 220 may be a whole or a plurality of auxiliary reflective sheets 220 may form a whole. During the setting, the area of the effective specular reflection area 221 of the auxiliary reflection sheet 220 is adjusted by adjusting the size and the spacing distance of the through holes 211 in different hollow areas or simultaneously adjusting the size and the spacing distance of the through holes 211, so that the intensity of the light reflected to the shadow area 500 is uniformly transited to the adjacent area.

Preferably, the sizes and/or the spacing distances of the through holes 211 distributed on the plurality of hollow areas are gradually changed, so that the specular reflection light intensity of the auxiliary reflection sheet 220 is controlled to be uniformly changed.

The shape of the through hole 211 is one or more of a circle, a square, a diamond and an ellipse. It should be noted that the shape of the through hole 211 is the cross-sectional shape of the through hole 211, and the cross-sectional shape of the through hole 211 is not limited to the above example of the present embodiment.

Second embodiment, a combined reflector structure, as shown in fig. 2, the second embodiment of the present invention is different from the first embodiment in that: the auxiliary reflection sheet 220 is disposed on the back plate 300, and specifically, the auxiliary reflection sheet 220 is adhered to the back plate 300 and forms a preset included angle with the main reflection sheet 100.

In actual operation, the auxiliary reflector plate 220 is adhered to the plane of the back plate 300 through the double-sided adhesive layer, and is set with the main reflector plate 100 to preset an included angle, the preset included angle is set adaptively according to the shadow area 500 with light adjusted as required, and no limitation is made in the embodiment. Through adjusting predetermine the contained angle, promptly main part reflector plate 100 with the contained angle between the supplementary reflector plate 220 forms different refraction angles, adjusts out various light reflection's composite effect, makes the light intensity of reflecting to shadow region 500 and the adjacent region transition even.

The embodiment utilizes the combination of diffuse reflection and specular reflection, and the specular reflection of the auxiliary emission sheet to concentrate light rays parallel to the required direction and emit the light rays in the concentrated direction towards the shadow area 500, so that the brightness of the shadow area 500 is improved, the utilization rate of the light source 400 is improved on the basis of not increasing the energy of the light source 400, and the uniform-brightness planar light source is realized. The problem of among the prior art, the easy shadow or the vignetting that appears of backlight unit is solved.

The utility model discloses technical scheme still provides a backlight unit, as shown in fig. 1 and fig. 2, including backplate 300, be provided with as above in the backplate 300 combination formula reflector plate structure. The back plate 300 is further provided with a light emitting source 400, the main body reflection sheet 100 is provided with a plurality of mounting parts 110, and the mounting parts 110 are used for assembling the light emitting source 400. The back plate 300 is further provided with a diffusion plate 310 and a diaphragm structure 320, wherein the diaphragm structure 320 is disposed on a side of the diffusion plate 310 away from the combined reflector structure.

Specifically, the diffusion plate 310 is located at the front end of the main board reflector, the diaphragm structure 320 is disposed on the diffusion plate 310, and a part of the light emitted from the light source directly passes through the diffusion plate 310 and the diaphragm structure 320 and then exits after being reflected to the diffusion plate 310 by the reflector.

The main body reflection sheet 100 uniformly reflects the light emitted from the light source 400 in all directions in a diffuse reflection manner. The auxiliary reflective sheet 220 reflects the light emitted from the light source 400 in parallel in a specular reflection manner according to a direction of reflection at a predetermined included angle, and concentrates the light to be emitted from the shadow area 500, thereby improving the brightness of the shadow area 500. Finally, the light emitted from the light source 400 is reflected by the reflector sheet combined by the main reflector sheet 100 and the auxiliary reflector sheet 220 to the diffuser plate 310 and the film structure 320 and then emitted, and the light passes through the diffuser plate 310 and the film structure 320 and is softer, so that a planar light source with uniform brightness is finally obtained.

The installation part 110 of the main body reflector plate 100 comprises an installation hole, the light emitting source 400 is arranged on the installation hole, a preset side refraction angle is arranged at the edge of the main body reflector plate 100, and the side refraction angle is arranged according to actual reflection needs. The edge of the back plate 300 is provided with a support plane for supporting the edge of the main body reflection sheet 100, the diffusion plate 310 is disposed at the front end of the main body reflection sheet 100, and the membrane structure 320 is disposed on the diffusion plate 310.

To sum up, the utility model discloses an increase the part of adjusting luminance, adjust luminance the part and carry out directive property reflection to light through supplementary reflector plate, have adjustment light reflection direction to and increase the effect of reflected light intensity, concentrate light and jet out towards a direction parallelly, concentrate towards the regional reflected light of shadow, thereby increase the luminance that shows the darker shadow region of plane light source, make the regional transition of showing that the plane light source is darker and brighter even. On the basis of not increasing the luminous source energy, the utilization rate of the luminous source is improved, and the purpose of uniform brightness of the plane light source is achieved.

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

1. A modular reflector plate structure which characterized in that: including being used for carrying out diffuse reflection's main part reflector plate and the part of adjusting luminance to light, the part of adjusting luminance is including setting up hollow out construction and a plurality of correspondence on the main part reflector plate set up the auxiliary reflection piece of hollow out construction department, the auxiliary reflection piece is used for carrying out directive property's specular reflection to light.

2. The combined reflector structure of claim 1, wherein: the main body reflection sheet comprises a diffuse reflection layer, the auxiliary reflection sheet comprises a mirror reflection layer arranged towards the main body reflection sheet, and the mirror reflection layer reflects light rays according to a preset direction and is used for adjusting the light ray reflection direction and increasing the intensity of the reflected light rays.

3. The combined reflector structure of claim 2, wherein: the main body reflector plate is arranged on the back plate; the auxiliary reflector plate is arranged on one surface, facing the back plate, of the main reflector plate, or the auxiliary reflector plate is arranged on the back plate.

4. The combined reflector structure of claim 3, wherein: the hollow structure is arranged at the edge of the main body reflector plate and comprises a plurality of through holes arranged on the main body reflector plate; the mirror reflection layer is arranged on one surface, facing the main reflection sheet, of the auxiliary reflection sheet.

5. The combined reflector structure of claim 4, wherein: the hollow structure comprises a plurality of hollow areas which are sequentially arranged, and the hollow areas are provided with through holes with different sizes and/or spacing distances respectively, and the through holes are used for adjusting the intensity of specular reflection light of the auxiliary reflector plate.

6. The combined reflector structure of claim 4, wherein: the auxiliary reflector plate is adhered to one surface, facing the back plate, of the main reflector plate; the auxiliary reflector comprises an effective mirror reflection area corresponding to the through hole, a double-sided adhesive layer is coated outside the effective mirror reflection area, and the auxiliary reflector is adhered to the back face of the hollow structure of the main reflector through the double-sided adhesive layer.

7. The combined reflector structure of claim 4, wherein: the auxiliary reflector plate is adhered to the back plate and forms a preset included angle with the main reflector plate.

8. A backlight module is characterized in that: comprising a back plate in which the combined reflector structure of any one of claims 1-7 is disposed.

9. A backlight module according to claim 8, wherein: the back plate is also provided with a light emitting source, and the main body reflecting plate is provided with a plurality of mounting parts for assembling the light emitting source.

10. A backlight module according to claim 8, wherein: the back plate is also internally provided with a diffusion plate and a diaphragm structure, and the diaphragm structure is arranged on one surface of the diffusion plate, which is far away from the combined reflector structure.