CN214311210U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN214311210U CN214311210U CN202120053695.5U CN202120053695U CN214311210U CN 214311210 U CN214311210 U CN 214311210U CN 202120053695 U CN202120053695 U CN 202120053695U CN 214311210 U CN214311210 U CN 214311210U
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- slope frame
- backlight module
- frame
- circuit board
- slope
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Abstract
The utility model discloses a backlight module and display device, include: a back plate and a reflective sheet; an LED assembly; the reflecting sheet is arranged between the back plate and the reflecting sheet; the LED assembly includes: a circuit board, a light source and a slope frame; the circuit board is arranged on the back plate, the light source is arranged on the circuit board, the slope frame is arranged between adjacent light sources, the shape of the reflector plate is matched with the slope frame, the reflector plate covers the slope frame, and the light source protrudes out of the reflector plate. The embodiment of the utility model provides an in backlight unit set up the slope frame between adjacent light source, set up the reflector plate that matches the slope frame shape simultaneously, and then can change the slope of reflector plate to increase the light-emitting energy of reflector plate, acquire even area source, avoided the dark band phenomenon.
Description
Technical Field
The utility model relates to an electronic product technical field, in particular to backlight module and display device.
Background
The liquid crystal display module comprises liquid crystal display panel and backlight unit, according to the light source position, present liquid crystal module mainly divide into straight following formula and side income formula two kinds, along with LED power is bigger and bigger, under the same module luminance, required LED number in the module is less and less, but because LED and optical lens's angle relatively fixed, screen body picture can't satisfy original homogeneity behind the LED number reduction, use 55 inches as an example, preceding LED arranges 6 x 10 and becomes 60, it arranges after 5 x 7 and 35 to update LED, because horizontal LED interval changes greatly, whole picture appears the dark band between two LEDs of vertical direction badly, traditional backlight scheme can't satisfy current product design demand.
Thus, the prior art has yet to be improved and enhanced.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned prior art's weak point, the utility model aims at providing a backlight unit and display device aims at overcoming the defect that dark zone appears in backlight unit among the prior art.
In order to achieve the purpose, the utility model adopts the following technical proposal:
an embodiment of the utility model provides a backlight module, include:
a back plate and a reflective sheet;
an LED assembly; the reflecting sheet is arranged between the back plate and the reflecting sheet;
the LED assembly includes: a circuit board, a light source and a slope frame;
the circuit board is arranged on the back plate, the light source is arranged on the circuit board, the slope frame is arranged between adjacent light sources, the shape of the reflector plate is matched with the slope frame, the reflector plate covers the slope frame, and the light source protrudes out of the reflector plate.
Furthermore, the backlight module also comprises a diffusion plate, and the LED assembly also comprises a thimble; one end of the thimble is arranged at the center of the gradient frame, and the other end of the thimble penetrates through the reflector plate to be abutted against the diffusion plate.
Furthermore, in the backlight module, the center of the slope frame is the highest point of the slope frame, the connection part of the slope frame and the circuit board is the starting point of the slope frame, and the starting point of the slope frame is the lowest point of the slope frame; the center of the slope frame is connected with the starting point of the slope frame.
Further, in the backlight module, the center of the slope frame and the starting point of the slope frame are connected through a convex arc line.
Further, in the backlight module, the center of the slope frame and the starting point of the slope frame are connected through a concave arc line.
Further, in the backlight module, the center of the slope frame is connected with the starting point of the slope frame through a straight line.
Further, among the backlight unit, the circuit board is rectangular form, light source evenly distributed in the length direction of circuit board, the bottom of slope frame is equipped with the bump, be equipped with on the circuit board with the recess of bump shape looks adaptation, the slope frame passes through the bump is fixed in the recess.
Furthermore, the backlight module further comprises a middle frame, and the middle frame is connected with the back plate.
Further, in the backlight module, the LED assembly further includes an optical lens, and the optical lens is disposed on the light source.
A display device further comprises the backlight module.
The utility model discloses the technical scheme who adopts has following beneficial effect:
the utility model provides a backlight module, include: a back plate and a reflective sheet; an LED assembly; the reflecting sheet is arranged between the back plate and the reflecting sheet; the LED assembly includes: a circuit board, a light source and a slope frame; the circuit board is arranged on the back plate, the light source is arranged on the circuit board, the slope frame is arranged between adjacent light sources, the shape of the reflector plate is matched with the slope frame, the reflector plate covers the slope frame, and the light source protrudes out of the reflector plate. The embodiment of the utility model provides an in backlight unit set up the slope frame between adjacent light source, set up the reflector plate that matches the slope frame shape simultaneously, and then can change the slope of reflector plate to increase the light-emitting energy of reflector plate, acquire even area source, avoided the dark band phenomenon.
Drawings
Fig. 1 is a schematic view of a first explosion structure of a backlight module according to the present invention;
fig. 2 is a schematic diagram of a second explosion structure of a backlight module according to the present invention;
fig. 3 is a schematic structural diagram of an LED assembly in a backlight module according to the present invention;
fig. 4 is a schematic view of a part of the structure of a reflector in a backlight module according to the present invention.
The utility model discloses: 100. a back plate; 200. a reflective sheet; 300. an LED assembly; 310. a circuit board; 320. a light source; 330. a slope frame; 340. an optical lens; 400. a middle frame; 500. a diffusion plate; 350. a thimble; 210. a convex portion; 220. a first through hole; 230. a second through hole; 331. the center of the grade rack; 332. the starting point of the grade rack.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In the embodiments and claims, the terms "a" and "an" can mean "one or more" unless the article is specifically limited.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The first embodiment is as follows:
the utility model discloses a backlight module please refer to fig. 1 to 4 together, wherein, backlight module includes: a back plate 100 and a reflective sheet 200; an LED assembly 300; is arranged between the back plate 100 and the reflector plate 200; the LED assembly 300 includes: circuit board 310, light source 320, and ramp 330; the circuit board 310 is arranged on the back plate 100, the light sources 320 are arranged on the circuit board 310, the slope frame 330 is arranged between the adjacent light sources 320, the reflector plate 200 is matched with the slope frame 330 in shape and covered on the slope frame 330, and the light sources 320 protrude out of the reflector plate 200. The LED assembly 300 further includes an optical lens 340, the optical lens 340 is disposed on the light source 320, and the optical lens 340 is used for enhancing the light utilization efficiency and the light emitting efficiency.
In the embodiment of the present invention, the circuit boards 310 are uniformly spaced on the inner side of the back plate 100, each circuit board 310 is provided with a plurality of light sources 320, because the light sources 320 are symmetrical to emit light, the dark band visual effect generally appears at the center of the connecting line of two adjacent light sources 320, a slope frame 330 is arranged between the two adjacent light sources 320, and the distance between the two ends of the slope frame 330 is equal to the distance between the two adjacent light sources 320; wherein, a double-sided adhesive tape or glue is arranged on the slope frame 330 for adhering and fixing the reflection sheet 200; the reflector 200 is covered on the slope frame 330, and is adapted to the shape of the slope frame 330, so that the slope of the reflector 200 in the backlight module can be changed, when the light source 320 emits light, the slope frame 330 has a certain slope, so that the cavity in the backlight module forms a variable cavity, and at a position far away from the light source 320 (namely, between the two light sources 320), the cavity at the position becomes smaller due to the slope frame 330, so that the optical path at the position becomes shorter, and light rays at the position are emitted from the backlight module earlier. Therefore, the light emitting energy is increased, and a uniform surface light source 320 is obtained, thereby solving the dark band problem.
Specifically, the circuit board 310 is long, the light sources 320 are uniformly distributed in the length direction of the circuit board 310, the bottom of the slope frame 330 is provided with a convex point (not shown in the figure), the circuit board 310 is provided with a groove (not shown in the figure) matched with the convex point in shape, and the slope frame 330 is fixed in the groove through the convex point. When the slope frame 330 is mounted on the circuit board 310, the bumps and the grooves can be used for achieving rapid pre-positioning, and mounting efficiency is greatly improved.
Optionally, the material of the slope frame 330 is plastic or metal; when the gradient frame 330 is made of metal, the gradient frame 330 is connected with the circuit board 310 in a welding mode, and when the gradient frame 330 is made of plastic, double-sided adhesive tape or watering can be selected to be connected with the circuit board 310; of course, the concrete connection mode of the slope frame 330 and the circuit board 310 should be selected according to actual situations, and the present invention is not limited thereto.
More specifically, the backlight module further includes a middle frame 400, and the middle frame 400 is connected to the back plate 100; the middle frame 400 is disposed on the back plate 100 and is used for connecting a display screen (not shown) and each optical film.
It should be noted that the back panel 100 is a common display back panel (a display back panel in a television), the circuit board 310 is a PCB, and the light source 320 is an LED lamp bead; therefore, the detailed structures of the display back plate 100, the circuit board 310 and the light source 320 are not described in detail.
As a further scheme, the backlight module further includes a diffusion plate 500, and the LED assembly 300 further includes a thimble 350; one end of the thimble 350 is disposed at the center of the slope frame 330, and the other end thereof passes through the reflection sheet 200 and abuts against the diffusion plate 500.
The embodiment of the present invention provides an embodiment, through the center of the slope frame 330 sets up the thimble 350, and through the thimble 350 supports the diffusion plate 500, can make the slope piece and the thimble 350 replace the support frame device in the existing backlight unit, when solving the dark band problem, provide certain holding power for the thimble 350.
Assuming that the heights of the slope frame and the thimble are H1 and the height of the existing supporting frame device is H2, the relationship between H1 and H2 is:
a, if the existing support frame device is adhered to the back plate, H2 is equal to the height of H1+ circuit board;
b, if the existing support frame device is adhered to the circuit board, H2 is H1.
More specifically, the reflective sheet 200 is provided with a protrusion 210, a first through hole 220 and a second through hole 230; the convex portions 210, the first through holes 220 and the second through holes 230 are distributed along the length direction of the reflective sheet 200, the convex portions 210 are arranged between the adjacent first through holes 220, and the second through holes 230 are arranged in the center of the convex portions 210; the shape of the protrusion 210 is adapted to the shape of the slope frame, and the protrusion is wrapped on the slope frame, the shape of the first through hole 220 is adapted to the shape of the light source 320 and is used for protruding the light source 320, and the shape of the second through hole 230 is adapted to the shape of the thimble 350 and is used for protruding the thimble 350.
As a further alternative, the center 331 of the slope frame is the highest point of the slope frame 330, the connection point of the slope frame 330 and the circuit board 310 is the starting point of the slope frame 330, and the starting point 332 of the slope frame is the lowest point of the slope frame 330; the center of the slope frame 330 is connected to the start point of the slope frame 330.
In the embodiment of the present invention, the center 331 of the slope frame is the highest point of the slope frame 330, and simultaneously the highest point of the slope frame 330 is also the center of the connection of the two light sources 320, so that the distance between the center of the connection line of the two light sources 320 and the diffusion plate 500 is reduced, thereby changing the light-emitting energy at this point to obtain the uniform surface light source 320 effect. The starting points 332 of the slope frame are two ends of the slope frame 330, the distances from the starting points 332 of the two slope frames to the light sources 320 on the two sides are equal, and the positions of the starting points of the slope frame 330 are set according to actual use conditions.
As a further alternative, the center 331 of the grade rack and the starting point 332 of the grade rack are connected by a convex arc. Since the dark band generally appears at the center of the connection line of the two light sources 320, the center 331 of the slope frame and the starting point 332 of the slope frame are connected by a convex arc with an increasing radius, so that the size of the slope frame 330 from the starting point to the center thereof gradually increases, and accordingly, the cavity distance between the center of the connection line of the two light sources 320 and the diffusion plate 500 becomes smaller, so that the optical path is shortened, light can be smoothly emitted from the diffusion plate 500, and the problem of the dark band in the area far away from the light sources 320 is solved.
As a further alternative, the center 331 of the slope frame is connected to the starting point 332 of the slope frame by a concave arc (not shown). Similarly, the center 331 of the slope frame and the starting point 332 of the slope frame are connected by the arc which is concave and the concave half value of which is continuously reduced, so that the size of the slope frame 330 from the starting point to the center thereof is gradually increased, the corresponding cavity distance between the central position of the connecting line of the two light sources 320 and the diffusion plate 500 is reduced, the optical path at the position is shortened, light can be smoothly emitted from the diffusion plate 500, and the problem of dark bands in the area far away from the light sources 320 is solved.
As a further alternative, the center 331 of the slope frame is connected to the starting point 332 of the slope frame by a straight line (not shown). Similarly, by connecting the center 331 of the slope frame and the starting point 332 of the slope frame with a straight line, the straight line is connected to the starting point 332 of the slope frame from the center 331 of the slope frame obliquely downward, so that the size of the slope frame 330 from the starting point to the center thereof gradually increases, and accordingly, the cavity distance between the central position of the connecting line of the two light sources 320 and the diffusion plate 500 becomes smaller, so that the optical path length at this position becomes shorter, light can be smoothly emitted from the diffusion plate 500, and the problem of dark bands in the area far away from the light sources 320 is solved.
More specifically, the center 331 of the slope frame and the starting point 332 of the slope frame may be connected by a concave-convex arc combination (not shown), and the condition that the size gradually increases from the starting point to the center of the slope frame should be satisfied. It should be understood that, in practical use, the center 331 of the slope frame and the starting point 332 of the slope frame are connected by a convex arc line, a concave arc line, a straight line or a combination of convex and concave arc lines, which should be selected according to practical requirements.
The working principle of the backlight module in the present invention is further described as follows:
by disposing the circuit board 310 on the back plate 100, disposing the slope frame 330 at the center of the connection line of the two light sources 320 on the circuit board 310, and covering the reflector sheet 200 with the shape adapted to the slope frame 330 on the slope frame 330, the slope of the reflector sheet 200 can be changed, when the light sources 320 emit light, because the slope frame 330 has a certain slope, the light path at the position far away from the light sources 320, i.e., the center of the connection line of the two light sources 320, is shortened because the slope frame 330 makes the distance from the diffusion plate 500 at the position closer, and the light path at the position is shortened, and the light at the position is emitted from the backlight module earlier. Therefore, the light emitting energy is increased, a uniform surface light source 320 is obtained, and the problem of dark bands is solved.
Example two:
the utility model discloses on above-mentioned backlight unit's basis, still disclose a display device, including foretell backlight unit. It should be understood that the display device further includes a portion for performing other functions, and the specific structure and operation principle of the other portions are the prior art, and therefore, the detailed description thereof is omitted here.
To sum up, the utility model provides a backlight module and display device, include: a back plate and a reflective sheet; an LED assembly; the reflecting sheet is arranged between the back plate and the reflecting sheet; the LED assembly includes: a circuit board, a light source and a slope frame; the circuit board is arranged on the back plate, the light source is arranged on the circuit board, the slope frame is arranged between adjacent light sources, the shape of the reflector plate is matched with the slope frame, the reflector plate covers the slope frame, and the light source protrudes out of the reflector plate. The embodiment of the utility model provides an in backlight unit set up the slope frame between adjacent light source, set up the reflector plate that matches the slope frame shape simultaneously, and then can change the slope of reflector plate to increase the light-emitting energy of reflector plate, acquire even area source, avoided the dark band phenomenon.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (10)
1. A backlight module, comprising:
a back plate and a reflective sheet;
an LED assembly; the reflecting sheet is arranged between the back plate and the reflecting sheet;
the LED assembly includes: a circuit board, a light source and a slope frame;
the circuit board is arranged on the back plate, the light source is arranged on the circuit board, the slope frame is arranged between adjacent light sources, the shape of the reflector plate is matched with the slope frame, the reflector plate covers the slope frame, and the light source protrudes out of the reflector plate.
2. The backlight module of claim 1, further comprising a diffuser plate, wherein the LED assembly further comprises a thimble; one end of the thimble is arranged at the center of the gradient frame, and the other end of the thimble penetrates through the reflector plate to be abutted against the diffusion plate.
3. The backlight module as claimed in claim 2, wherein the center of the slope frame is the highest point of the slope frame, the connection point of the slope frame and the circuit board is the starting point of the slope frame, and the starting point of the slope frame is the lowest point of the slope frame; the center of the slope frame is connected with the starting point of the slope frame.
4. The backlight module as claimed in claim 3, wherein the center of the sloped shelf and the starting point of the sloped shelf are connected by a convex arc.
5. The backlight module as claimed in claim 3, wherein the center of the slope frame is connected to the starting point of the slope frame by a concave arc.
6. The backlight module as claimed in claim 3, wherein the center of the slope frame is connected to the start point of the slope frame by a straight line.
7. The backlight module according to claim 2, wherein the circuit board is in an elongated shape, the light sources are uniformly distributed along a length direction of the circuit board, the bottom of the slope frame is provided with bumps, the circuit board is provided with grooves adapted to the bumps, and the slope frame is fixed to the grooves through the bumps.
8. The backlight module as claimed in claim 2, further comprising a middle frame connected to the back plate.
9. The backlight module according to claim 2, wherein the LED assembly further comprises an optical lens disposed on the light source.
10. A display device, further comprising a backlight module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120053695.5U CN214311210U (en) | 2021-01-08 | 2021-01-08 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120053695.5U CN214311210U (en) | 2021-01-08 | 2021-01-08 | Backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214311210U true CN214311210U (en) | 2021-09-28 |
Family
ID=77823959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120053695.5U Active CN214311210U (en) | 2021-01-08 | 2021-01-08 | Backlight module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214311210U (en) |
-
2021
- 2021-01-08 CN CN202120053695.5U patent/CN214311210U/en active Active
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