CN219958035U

CN219958035U - Novel improvement structure in a poor light

Info

Publication number: CN219958035U
Application number: CN202321752619.9U
Authority: CN
Inventors: 夏豪
Original assignee: Hefei Union Optronics Technology Co ltd
Current assignee: Hefei Union Optronics Technology Co ltd
Priority date: 2023-07-06
Filing date: 2023-07-06
Publication date: 2023-11-03
Anticipated expiration: 2033-07-06

Abstract

The utility model relates to the field of backlight and discloses a novel improved backlight structure. In the present utility model, the improved novel backlight comprises: back plate + reflector plate + high-power LED package (including PCB board) +light guide plate (bottom containing mesh point + inner protruding structure + light diffusion particles) +membrane + glue shell). The distance between the convex parts corresponding to the vertical bottom of the middle of the light guide plate of the high-power LED is controlled within 1mm, so that the problems that the direct type LED backlight is not easy to thin and the LED is simply packaged are solved, and meanwhile, the defects that the side-in type LED backlight LED cannot perform light local control and has poor heat dissipation are also solved; the number of LEDs is greatly reduced, and the cost is reduced. The novel backlight avoids the defects of direct type LED backlight and side-in type LED backlight, integrates the respective advantages, and ensures that light is uniformly emitted after passing through the light guide plate, and meanwhile, the inside and the surface layer of the light guide plate contain light diffusion particles to ensure that the light guide plate has diffusion characteristics of a diffusion plate, so that the light emission is more uniform.

Description

Novel improvement structure in a poor light

Technical Field

The utility model belongs to the technical field of backlight, and particularly relates to a novel improved backlight structure.

Background

The liquid crystal backlight is provided in two modes, namely direct-type (DLED) and side-entry type (ELED), and the advantages and disadvantages of the direct-type and side-entry type LED backlights are as follows: the direct type is thinner than the side-in type in the thickness of the screen, and has the advantages of low material cost and quick heat dissipation; taking the backlight module commonly used at present as an example, the assembly sequence from bottom to top is sequentially a reflective sheet, a diffusion plate (light guide plate), a prism sheet and a diffusion sheet. The reflective sheet has a function of reflecting the unused light source to pass through the diffusion plate again, thereby improving the light utilization efficiency, and is used as a light leakage design.

However, the side-in LED backlight has the main disadvantages of being incapable of performing local control of light, poor in matching of any size and poor in heat dissipation.

Disclosure of Invention

The utility model aims at: in order to solve the above-mentioned problems, a novel improved backlight structure is provided.

The technical scheme adopted by the utility model is as follows: a novel improved backlight structure, the improved novel backlight comprising: back plate + reflector plate + high-power LED package (including PCB board) +light guide plate (bottom containing mesh point + inner protruding structure + light diffusion particles) +membrane + glue shell).

In a preferred embodiment, the distance between the corresponding convex parts at the vertical bottom of the middle of the high-power LED arranged on the light guide plate is controlled within 1 mm.

In a preferred embodiment, the light emitted by the high-power LED enters the direct-type light guide plate through the bottom, and is emitted to the top and the side surfaces of the convex part, and the configuration of the top of the convex part corresponds to that of the lens (arc shape) of the direct-type LED, and the entered light is refracted above the light guide plate through the bottom reflector.

In a preferred embodiment, the sides of the convex portions (the cross-sectional view is a straight line) change the propagation direction of the light, so that the light propagates in the light guide plate along the direction parallel to the light exit surface, and the light guide plate reflects the propagated light to the top of the light guide plate through the dots.

In a preferred embodiment, the small circles on the upper part of the inner structure of the light guide plate are diffusion particles, the large circles on the lower part are lattice points, and the sectors are convex parts.

In a preferred embodiment, the light emitting surface of the LED is circular or rectangular, the LED is located at a vertical position (red circle is LED) of the center of the light emitting surface, the number of LEDs is one or more according to the light emitting efficiency and practical requirements of the LED, the light guide plate is PMMA or MS, the thickness is 2mm/2.5mm/3mm, and the height of the protruding part for fixing and guiding light is less than 3mm; the bottom shape of the convex part can be round, variable and diamond, and the bottom area is required to be not more than one quarter of the area of the light-emitting surface.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

according to the utility model, the defects that the direct type LED backlight is not easy to thin and the LED is simply packaged, and the side-entering type LED backlight LED cannot perform light local control and has poor heat dissipation are overcome; the number of LEDs is greatly reduced, and the cost is reduced. The novel backlight avoids the defects of direct type LED backlight and side-in type LED backlight, integrates the respective advantages, and ensures that light is uniformly emitted after passing through the light guide plate, and meanwhile, the inside and the surface layer of the light guide plate contain light diffusion particles to ensure that the light guide plate has diffusion characteristics of a diffusion plate, so that the light emission is more uniform.

Drawings

FIG. 1 is a view showing an internal structure of a light guide plate according to the present utility model;

FIG. 2 is a diagram of a circular light-emitting surface LED structure in the present utility model;

FIG. 3 is a view showing a structure of a light guide plate with a side angle alpha positioned at 45 deg. in the present utility model;

fig. 4 is a diagram showing a structure in which the convex portion of the light guide plate is located right above the LED position in the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

With reference to figures 1-4 of the drawings,

examples:

a novel improved backlight structure, the improved novel backlight comprising: back plate + reflector plate + high-power LED package (including PCB board) +light guide plate (bottom containing mesh point + inner protruding structure + light diffusion particles) +membrane + glue shell).

The distance between the convex parts corresponding to the vertical bottoms of the middle parts of the high-power LEDs arranged on the light guide plates is controlled within 1 mm.

Light emitted by the high-power LED enters the direct type light guide plate through the bottom and is emitted to the top and the side surfaces of the convex parts, and the structure of the top of the convex parts is equivalent to that of a lens (arc-shaped) of the direct type LED, and the entered light is refracted above the light guide plate through the bottom reflecting sheet.

The side surfaces (the cross section is a straight line) of the convex parts change the light propagation direction, so that the light propagates in the light guide plate along the direction parallel to the light emergent surface, and the light guide plate reflects the propagated light to the top of the light guide plate through the lattice points.

The small circles on the inner structure of the light guide plate are diffusion particles, the large circles on the lower part are net points, and the sectors are convex parts.

The LED light-emitting surface is round or rectangular, the LEDs are positioned in the vertical position (red circles are LEDs) at the center of the light-emitting surface, and the number of the LEDs can be one or more according to the luminous efficiency of the LEDs and the actual requirements.

The LED specification is as follows: 1. high power; 2. the light-emitting surface is round or rectangular. The positions of the LEDs are shown in the vertical position (red circles are LEDs) of the center of the light emitting surface in fig. 2, the number of the LEDs can be one or more according to the light emitting efficiency of the LEDs and the actual requirements, the following examples are that the number of the LEDs is 3 according to nine-point test standard positions of a picture, and the positions are at the 2 nd point, the 5 th point and the 8 th point of nine-point test.

The internal structure of the light guide plate is shown in a cross-sectional view in fig. 1, wherein small circles on the upper part are diffusion particles, large circles on the lower part are net points, and sectors are convex parts.

PMMA or MS is adopted as the light guide plate, 2mm/2.5mm/3mm is adopted as the thickness, and the height of the convex part for fixing and guiding light is less than 3mm; the bottom shape of the convex part can be round, variable and diamond, and the bottom area is required to be not more than one quarter of the area of the light-emitting surface.

The implementation principle of the embodiment of the novel improved backlight structure is as follows: according to the utility model, the defects that the direct type LED backlight is not easy to thin and the LED is simply packaged, and the side-entering type LED backlight LED cannot perform light local control and has poor heat dissipation are overcome; the number of LEDs is greatly reduced, and the cost is reduced. The novel backlight avoids the defects of direct type LED backlight and side-in type LED backlight, integrates the respective advantages, and ensures that light is uniformly emitted after passing through the light guide plate, and meanwhile, the inside and the surface layer of the light guide plate contain light diffusion particles to ensure that the light guide plate has diffusion characteristics of a diffusion plate, so that the light emission is more uniform.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The utility model provides a novel improvement structure in a poor light which characterized in that: the improved novel backlight comprises: the back plate, the reflecting sheet, the high-power LED package comprises a PCB (printed circuit board) and a light guide plate, and the bottom comprises net points, an internal convex structure, light diffusion particles, a membrane and a rubber shell.

2. A new and improved backlight structure as claimed in claim 1, wherein: the distance between the convex parts corresponding to the vertical bottoms of the middle parts of the high-power LEDs arranged on the light guide plates is controlled within 1 mm.

3. A new and improved backlight structure as claimed in claim 1, wherein: light emitted by the high-power LED enters the direct type light guide plate through the bottom and is emitted to the top and the side face of the convex part, and the structure of the top of the convex part is equivalent to that of a lens of the direct type LED, and the entered light is refracted above the light guide plate through the bottom reflecting sheet.

4. A new and improved backlight structure as claimed in claim 1, wherein: the side surfaces (the cross section is a straight line) of the convex parts change the light propagation direction, so that the light propagates in the light guide plate along the direction parallel to the light emergent surface, and the light guide plate reflects the propagated light to the top of the light guide plate through the lattice points.

5. A new and improved backlight structure as claimed in claim 1, wherein: the small circles on the inner structure of the light guide plate are diffusion particles, the large circles on the lower part are net points, and the sectors are convex parts.

6. A new and improved backlight structure as claimed in claim 1, wherein: the LED light-emitting surface is round or rectangular, the LEDs are positioned in the vertical position (red circles are LEDs) at the center of the light-emitting surface, and the number of the LEDs can be one or more according to the luminous efficiency of the LEDs and the actual requirements.

7. A new and improved backlight structure as claimed in claim 1, wherein: PMMA or MS is adopted as the light guide plate, 2mm/2.5mm/3mm is adopted as the thickness, and the height of the convex part for fixing and guiding light is less than 3mm; the bottom shape of the convex part can be round, variable and diamond, and the bottom area is required to be not more than one quarter of the area of the light-emitting surface.