CN216901247U - Backlight module capable of emitting light uniformly - Google Patents
Backlight module capable of emitting light uniformly Download PDFInfo
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- CN216901247U CN216901247U CN202220565990.3U CN202220565990U CN216901247U CN 216901247 U CN216901247 U CN 216901247U CN 202220565990 U CN202220565990 U CN 202220565990U CN 216901247 U CN216901247 U CN 216901247U
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- backlight module
- diffusion film
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Abstract
The utility model discloses a backlight module with uniform light emission, which comprises a lower iron frame, a flexible circuit board, a plurality of LED lamps, a light guide plate, an upper diffusion film and a frame-shaped black shading belt, wherein the lower iron frame comprises a substrate and a side plate extending upwards from the edge of the substrate; the flexible circuit board is fixed on the inner side of the side plate; the LED lamps are fixed on the flexible circuit board, and the light emitting surface of each LED lamp is covered with a side diffusion film; the light guide plate is arranged on the upper surface of the substrate, one side of the light guide plate is close to the plurality of LED lamps, a bright area is formed in the area in front of the LED lamps, and a dark area is formed in the area in front between the adjacent LED lamps; the upper diffusion film covers the upper surface of the light guide plate, and a hollowed part is formed in each bright area of the upper diffusion film located outside the visible area; the frame-shaped black shading band is arranged on the upper diffusion film and completely covers the hollowed part, and the frame-shaped black shading band is located outside the visible area. The LED lamp and the backlight module emit light more uniformly.
Description
Technical Field
The utility model relates to the technical field of liquid crystal display, in particular to a backlight module with uniform light emission.
Background
The light source of the general backlight module is provided by a plurality of LED lamps which are arranged at intervals, and light rays emitted by the LED lamps are uniformly paved through various film materials in the backlight module, so that uniform emergent light is formed. However, because the LED lamps are arranged at intervals as light sources, a bright area is easily formed in a light outgoing area close to the LED lamps, a dark area is easily formed in an area between two adjacent LED lamps, and when a user watches the LED lamps at a certain angle, the LED lamps are uneven in brightness in front of the LED lamps, so that poor display is caused, the probability of defective products of the products is increased, the production and manufacturing costs of the products are increased, the competitiveness of the products is reduced, and the ever-increasing quality requirements of production enterprises cannot be met.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is how to make the light-emitting of the backlight module more uniform, because the upper diffusion film covers the upper surface of the light guide plate, the upper diffusion film outside the visible area is provided with a hollowed part at each bright area, and the frame-shaped black shading band completely covers the hollowed parts, the light-absorbing property of the frame-shaped black shading band can be utilized, the light at the bright area can be weakened, so that the brightness at the bright area is reduced, and the upper diffusion film at the dark area diffuses the light, so that the brightness at the dark area is increased, and further the light-emitting of the backlight module is uniform, and the backlight module achieves the normal display effect; because the light-emitting surface of each LED lamp is covered with the side diffusion film, the light of each LED lamp when emitting light can be diffused by the side diffusion film, the light and shade effect of a bright area and a dark area is further weakened, the light-emitting of the LED lamp and the backlight module is more uniform, the condition that the brightness is uneven in the front of the LED lamp when a user watches at a certain angle is avoided, the display is avoided being poor, the probability of defective products of the products is greatly reduced, the production and manufacturing cost of the products is reduced, the competitiveness of the products is improved, and the ever-increasing quality requirements of production enterprises are met.
The technical problem to be solved by the utility model is realized by the following technical scheme:
in order to solve the technical problem, the utility model provides a backlight module with uniform light emission, which comprises a lower iron frame, a flexible circuit board, a plurality of LED lamps, a light guide plate, an upper diffusion film and a frame-shaped black shading belt, wherein the lower iron frame comprises a substrate and a side plate extending upwards from the edge of the substrate; the flexible circuit board is fixed on the inner side of the side plate; the LED lamps are fixed on the flexible circuit board, and the light emitting surface of each LED lamp is covered with a side diffusion film; the light guide plate is arranged on the upper surface of the substrate, one side of the light guide plate is close to the plurality of LED lamps, a bright area is formed in the area in front of the LED lamps, and a dark area is formed in the area in front between the adjacent LED lamps; the upper diffusion film covers the upper surface of the light guide plate, and a hollowed part is formed in each bright area of the upper diffusion film located outside the visible area; the frame-shaped black shading band is arranged on the upper diffusion film and completely covers the hollowed part, and the frame-shaped black shading band is located outside the visible area.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, a reflective sheet is disposed on the lower surface of the frame-shaped black light-shielding strip in the dark area.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, the shape of the light reflecting sheet corresponds to the shape of the dark area.
In a preferred embodiment of the backlight module with uniform light emission, the hollowed portion has a shape corresponding to the shape of the bright region.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, at least one elastic block is disposed between one side of the light guide plate away from the LED lamp and the side plate.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, at least one protrusion is disposed on both sides of the elastic block.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, the elastic block is provided with a shock absorbing hole between adjacent bumps.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, grooves are disposed on the inner walls of the damping holes on the side close to the bumps, and a damping device is disposed between adjacent grooves.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, the damping device is a spring or two magnets with opposite poles.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, the elastic block is in interference fit with the light guide plate and the side plate.
The utility model has the following beneficial effects:
the upper diffusion film covers the upper surface of the light guide plate, the upper diffusion film outside the visible area is provided with a hollowed part at each bright area, the frame-shaped black shading band completely covers the hollowed parts, the light absorption characteristics of the frame-shaped black shading band can be utilized, the light at the bright areas can be weakened, the brightness at the bright areas is reduced, the upper diffusion film at the dark areas diffuses the light, the brightness at the dark areas is increased, the backlight module emits light uniformly, and the normal display effect is achieved; because the light-emitting surface of each LED lamp is covered with the side diffusion film, the light of each LED lamp when emitting light can be diffused by the side diffusion film, the light and shade effect of a bright area and a dark area is further weakened, the light-emitting of the LED lamp and the backlight module is more uniform, the condition that the brightness is uneven in the front of the LED lamp when a user watches at a certain angle is avoided, the display is avoided being poor, the probability of defective products of the products is greatly reduced, the production and manufacturing cost of the products is reduced, the competitiveness of the products is improved, and the ever-increasing quality requirements of production enterprises are met.
Drawings
In order to illustrate the solution of the present application more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic structural view of a backlight module with uniform light emission according to the present invention.
Fig. 2 is a schematic top view of the upper diffusion film and the LED lamp in fig. 1.
Fig. 3 is a schematic structural view of the frame-type black shading tape in fig. 1.
Fig. 4 is a schematic structural view of embodiment 3.
Fig. 5 is a schematic structural view of the elastic block in fig. 4.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model provides a backlight module with uniform light emission, which comprises a lower iron frame 1, a flexible circuit board 2, a plurality of LED lamps 3, a light guide plate 4, an upper diffusion film 5 and a frame-shaped black shading belt 6, wherein the lower iron frame 1 comprises a substrate 11 and a side plate 12 extending upwards from the edge of the substrate 11; the flexible circuit board 2 is fixed on the inner side of the side plate 12; the LED lamps 3 are fixed on the flexible circuit board 2, and the light emitting surface of each LED lamp 3 is covered with a side diffusion film 7; the light guide plate 4 is arranged on the upper surface of the substrate 11, one side of the light guide plate is close to the plurality of LED lamps 3, a bright area is formed in the front area of the LED lamps 3, and a dark area is formed in the front area between the adjacent LED lamps 3; the upper diffusion film 5 covers the upper surface of the light guide plate 4, and a hollowed part 51 is formed in each bright area of the upper diffusion film 5 located outside the visible area; the frame-shaped black shading band 6 is disposed on the upper diffusion film 5 and completely covers the hollowed portion 51, and the frame-shaped black shading band 6 is located outside the visible region.
Because the upper diffusion film 5 covers the upper surface of the light guide plate 4, the upper diffusion film 5 outside the visible region is provided with the hollowed part 51 at each bright region, and the frame-shaped black shading band 6 completely covers the hollowed part 51, the light absorption characteristics of the frame-shaped black shading band 6 can be utilized to weaken the light at the bright region, so that the brightness at the bright region is reduced, and the upper diffusion film 5 at the dark region diffuses the light, so that the brightness at the dark region is increased, further the backlight module emits light uniformly, and the backlight module achieves the normal display effect; because the play plain noodles of every LED lamp 3 all covers side diffusion barrier 7 again, make every LED lamp 3 all can be diffused by side diffusion barrier 7 when going out light, the bright area of further having weakened and dark regional light and shade effect, make LED lamp 3 and backlight unit's light-emitting more even, avoid the user to appear bright dark uneven condition in the place ahead of LED lamp 3 when watching with certain angle, thereby avoid causing and show badly, and then make the defective products probability of product reduce by a wide margin, the production and the manufacturing cost of product have been reduced, the competitiveness of product has been improved, thereby satisfy the growing quality requirement of manufacturing enterprise.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. The utility model is described in detail below with reference to the drawings, wherein examples of the embodiments are shown in the drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
Example 1
Referring to fig. 1 and 2, a backlight module with uniform light emission provided by the present invention includes a lower iron frame 1, a flexible circuit board 2, a plurality of LED lamps 3, a light guide plate 4, an upper diffusion film 5, and a frame-shaped black shading tape 6, where the lower iron frame 1 includes a substrate 11 and a side plate 12 extending upward from an edge of the substrate 11; the flexible circuit board 2 is fixed on the inner side of the side plate 12; the LED lamps 3 are fixed on the flexible circuit board 2, and a light-emitting surface of each LED lamp 3 is covered with a side diffusion film 7; the light guide plate 4 is arranged on the upper surface of the substrate 11, one side of the light guide plate is close to the plurality of LED lamps 3, a bright area is formed in the front area of the LED lamps 3, and a dark area is formed in the front area between the adjacent LED lamps 3; the upper diffusion film 5 covers the upper surface of the light guide plate 4, and a hollowed part 51 is formed in each bright area of the upper diffusion film 5 located outside the visible area; the frame-shaped black shading band 6 is disposed on the upper diffusion film 5 and completely covers the hollowed portion 51, and the frame-shaped black shading band 6 is located outside the visible region. Because the upper diffusion film 5 covers the upper surface of the light guide plate 4, the upper diffusion film 5 outside the visible region is provided with a hollowed part 51 at each bright region, and the frame-shaped black shading belt 6 completely covers the hollowed parts 51, the light absorption characteristics of the frame-shaped black shading belt 6 can be utilized to weaken the light at the bright region, so that the brightness at the bright region is reduced, and the upper diffusion film 5 at the dark region diffuses the light, so that the brightness at the dark region is increased, further the backlight module emits light uniformly, and the normal display effect is achieved; because the light-emitting surface of each LED lamp 3 is covered with the side diffusion film 7, the light of each LED lamp 3 in the light-emitting process can be diffused by the side diffusion film 7, the bright and dark effects of a bright area and a dark area are further weakened, the light-emitting of the LED lamp 3 and the backlight module is more uniform, the condition that the brightness is uneven in the front of the LED lamp 3 when a user watches at a certain angle is avoided, poor display is avoided, the probability of defective products of the products is greatly reduced, the production and manufacturing costs of the products are reduced, the competitiveness of the products is improved, and the ever-increasing quality requirements of production enterprises are met.
Example 2
Referring to fig. 1 and fig. 3, as a further optimized solution of embodiment 1, in this embodiment, since the frame-type black light-shielding tape 6 is directly attached to the upper diffusion film 5, it still has a slight light-absorbing function, and a part of the light is still absorbed by the frame-type black light-shielding tape 6, so that the brightness of the dark area is still reduced. And a reflective sheet 61 is arranged on the lower surface of the frame-shaped black shading belt 6 in the dark area. The frame-shaped black shading belt 6 is not directly attached to the upper diffusion film 5, but the upper diffusion film 5 is contacted with the reflector 61, and the reflector 61 is used for reflecting light out without being absorbed, so that the brightness of a dark area is further enhanced, the backlight module emits light uniformly, and the normal display effect is achieved.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, the shape of the light-reflecting sheet 61 corresponds to the shape of the dark area, which can make the backlight module emit light more uniformly, so that the backlight module achieves a normal display effect.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, the hollowed part 51 has a shape corresponding to the shape of the bright area, which can make the light emitted from the backlight module more uniform, so as to achieve a normal display effect.
Example 3
Referring to fig. 4, as a further optimized solution of embodiment 1, in this embodiment, at least one elastic block 8 is disposed between one side of the light guide plate 4 away from the LED lamp 3 and the side plate 12, and the elastic block 8 is disposed to enable the light guide plate 4 to be firmly abutted against the elastic block 8, so as to buffer the impact force of the light guide plate 4 on the lower iron frame 1, avoid the sound caused by the collision between the light guide plate 4 and the lower iron frame 1, and simultaneously, improve the service life of the light guide plate 4.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, at least one protrusion 81 is disposed on each of two sides of the elastic block 8, and the protrusion 81 is directly abutted to the light guide plate 4 and the side plate 12 of the lower iron frame 1, so that the elastic block 8 can be aligned to the light guide plate 4 and the side plate 12, and the buffering performance of the elastic block 8 is further improved.
Referring to fig. 5, as the service time of the elastic block 8 increases, the elastic block 8 also weakens elasticity with aging, and in order to increase the impact force buffering capacity of the elastic block 8 and increase the service life of the elastic block 8, as a preferred embodiment of the backlight module with uniform light emission provided by the present invention, the elastic block 8 is provided with a shock absorbing hole 82 between adjacent bumps 81, in this embodiment, the shock absorbing hole 82 is a square hole, and when the light guide plate 4 impacts on the elastic block 8, the elastic block 8 deforms in a concave manner towards the shock absorbing hole 82, so as to absorb the impact force of the light guide plate 4, thereby further achieving the purposes of shock absorption and noise reduction. It should be noted that the damping hole 82 may be a through hole, a blind hole, or an inner hole disposed inside the elastic block 8, which is not limited herein and falls within the protection scope of the present invention. The through holes are selected in the embodiment, so that the manufacturing is easy and the production cost is low. The shape of the damping hole 82 may be a square hole or a round hole, which can be selected according to the actual situation, and is not limited herein.
In order to further increase the capability of the elastic block 8 for buffering the impact force, the inner walls of the shock absorption holes 82 close to one side of the protruding block 81 are provided with two grooves 83, the protruding block 81 of the embodiment is only provided with two grooves 83, the grooves 83 can be provided with a plurality of protruding blocks 81 and a plurality of grooves 83 according to practical situations, a shock absorption device 84 is arranged between the adjacent grooves 83, the shock absorption device 84 can further increase the capability of the elastic block 8 for buffering the impact force to absorb the impact force of the light guide plate 4, and therefore the purposes of shock absorption and noise reduction are further achieved.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, the damping device 84 is a spring or any one of two magnets with opposite poles, and the elastic force of the spring or the repulsive force generated by the two magnets with opposite poles further increases the capability of the elastic block 8 to buffer the impact force; the spring and the magnet are standard commodities which can be purchased in the market, special customization is not needed, the purchasing cost is low, the spring and the magnet can be replaced at any time, and the cost performance is high.
In order to further reduce the sound generated by mutual impact between the components, the elastic block 8 is in interference fit with the light guide plate 4 and the side plate 12 of the lower iron frame 1, one convex block 81 of the elastic block 8 is abutted on the light guide plate 4, and the other convex block 81 is abutted on the side plate 12.
As a preferred embodiment of the backlight module with uniform light emission provided by the present invention, the elastic block 8 is a rubber block.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are 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," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the utility model and do not limit the scope of the utility model. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.
Claims (10)
1. The utility model provides a luminous even backlight unit which characterized in that, it includes:
a lower iron frame comprising a base plate and a side plate extending upward from an edge of the base plate;
a flexible circuit board fixed to an inner side of the side plate;
the LED lamps are fixed on the flexible circuit board, and the light emitting surface of each LED lamp is covered with a side diffusion film;
the light guide plate is arranged on the upper surface of the substrate, one side of the light guide plate is close to the plurality of LED lamps, a bright area is formed in the front area of the LED lamps, and a dark area is formed in the front area between the adjacent LED lamps;
the upper diffusion film covers the upper surface of the light guide plate, and hollowed parts are formed in the positions, located outside the visible area, of the bright areas of the upper diffusion film;
and the frame-shaped black shading band is arranged on the upper diffusion film and completely covers the hollowed part, and the frame-shaped black shading band is positioned outside the visible region.
2. The backlight module as claimed in claim 1, wherein a reflective sheet is disposed on a lower surface of the frame-shaped black shading tape in the dark area.
3. The backlight module as claimed in claim 2, wherein the shape of the reflector corresponds to the shape of the dark area.
4. The backlight module with uniform illumination as defined by claim 1, wherein the hollowed portion has a shape corresponding to the shape of the bright region.
5. The backlight module as claimed in claim 1, wherein at least one elastic block is disposed between the side of the light guide plate away from the LED lamp and the side plate.
6. The backlight module as claimed in claim 5, wherein the elastic block has at least one protrusion on both sides.
7. The backlight module as claimed in claim 6, wherein the elastic blocks have damping holes between adjacent bumps.
8. The backlight module as claimed in claim 7, wherein the inner walls of the damping holes adjacent to the bumps are provided with grooves, and a damping device is disposed between adjacent grooves.
9. The backlight module as claimed in claim 8, wherein the damping device is a spring or two magnets with opposite poles.
10. The backlight module as claimed in claim 5, wherein the elastic blocks are in interference fit with the light guide plate and the side plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220565990.3U CN216901247U (en) | 2022-03-14 | 2022-03-14 | Backlight module capable of emitting light uniformly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220565990.3U CN216901247U (en) | 2022-03-14 | 2022-03-14 | Backlight module capable of emitting light uniformly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216901247U true CN216901247U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220565990.3U Active CN216901247U (en) | 2022-03-14 | 2022-03-14 | Backlight module capable of emitting light uniformly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216901247U (en) |
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2022
- 2022-03-14 CN CN202220565990.3U patent/CN216901247U/en active Active
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