CN217157017U - Buffer type reflector and direct type backlight module - Google Patents

Abstract

The utility model discloses a buffering formula bowl and straight following formula backlight unit, this buffering formula bowl includes a plurality of reflection cups, the reflection cup includes that a plurality of consecutive order connect's reflection side adjacent two reflection cup's adjacent two reflection side's junction tip is equipped with buffer structure to draw pressure when subducing the harmomegathus between a plurality of reflection cups, the bowl draws pressure when producing the harmomegathus because of factors such as temperature influence, this buffer structure of accessible subducts, avoid drawing pressure to cause reflection side fold and influence optical effect. The direct type backlight module using the buffer type reflector has the advantages that under the condition that the cost is not increased, the buffer structure with the simple structure is arranged on the reflector, so that the backlight module is more stable, the light efficiency problem caused by expansion and contraction of the reflector is effectively prevented, and the brightness uniformity is improved.

Description

Buffer type reflector and direct type backlight module

Technical Field

The utility model relates to a backlight unit field especially relates to a buffering formula bowl and straight following formula backlight unit.

Background

BackLight module (BackLight) is a device for providing light source behind a Liquid Crystal Display (LCD), and its light emitting effect directly affects the visual effect of the liquid crystal display module (LCM). The liquid crystal itself does not emit light and it displays graphics or characters as a result of its modulation of the light produced by the backlight module.

The key point of the direct type backlight module is to control the uniformity of light emission and improve the luminous efficiency. In order to achieve better partitioned display effect in the direct-type backlight module, a reflection partitioning mechanism is generally used as a reflection mechanism of the direct-type backlight module, so that the direct-type backlight module is isolated into display partitions. The bowl comprises a plurality of reflection cups, is equipped with a hole or a plurality of holes in the reflection cup to hold one or a plurality of LED light sources, with the straight following formula lamp plate structure that is applicable to between different LED PITCH value size, like TV, on-vehicle, TV etc.. However, the conventional reflective cover is subject to expansion and contraction due to factors such as temperature during experimental verification or long-term use, thereby forming wrinkles, and further affecting the optical effect of the backlight module.

SUMMERY OF THE UTILITY MODEL

In order to overcome above-mentioned prior art an at least defect, the utility model provides a buffering formula bowl and straight following formula backlight unit to thereby factor influences such as the temperature of solving current bowl produce the harmomegathus and form the fold, influence backlight unit's optical effect's problem.

The utility model discloses a solve the technical scheme that its problem adopted and be:

in a first aspect, the utility model discloses a buffering formula bowl, including a plurality of reflection cups, the reflection cup includes a plurality of reflection sides that connect gradually, wherein:

the end part of the joint of two adjacent reflecting side surfaces of two adjacent reflecting cups is provided with a buffer structure so as to reduce the tension and pressure when the reflecting cups expand and contract.

The utility model provides a buffering formula bowl, buffer structure set up in the junction tip of two adjacent reflection sides of two adjacent reflection cups, and the bowl draws pressure when producing the harmomegathus because of factors such as temperature influence, and this buffer structure of accessible subducts, avoids drawing pressure to cause reflection side fold and influence optical effect.

Further, the buffer structure is an opening.

Furthermore, openings are formed in two end portions of the connecting position of two adjacent reflecting side surfaces of two adjacent reflecting cups, so that four adjacent openings are connected to form a cross-shaped opening.

Furthermore, an opening is formed in one end of the joint of two adjacent reflecting side surfaces of two adjacent reflecting cups, so that two adjacent openings are connected to form a linear opening.

Furthermore, a plurality of the linear openings are arranged at intervals in a transverse-vertical crossing mode.

Further, the length of the opening is 1/4-1/3 of the length of the joint of the adjacent reflecting side faces.

Further, a plurality of the reflecting cup arrays are arranged.

Furthermore, the bottom of the reflecting cup is provided with a light outlet.

In a second aspect, the present invention further discloses a direct type backlight module, which comprises a circuit board, a light emitting element, a diffusion plate, an optical film, and the reflector as described above;

the circuit board, the light-emitting element, the diffusion plate and the optical membrane are sequentially arranged, the reflecting cover is arranged between the circuit board and the diffusion plate, and the light-emitting element is arranged in the light outlet hole of the reflecting cup.

Further, the optical film comprises a diffusion film, a fluorescent film, a lower brightness enhancement film and an upper brightness enhancement film which are sequentially connected in sequence, and the diffusion film is connected with the diffusion plate.

To sum up, the utility model discloses a buffering formula bowl and straight following formula backlight unit have following technological effect:

the utility model provides a buffering formula bowl, buffer structure set up in the junction tip of two adjacent reflection sides of two adjacent reflection cups, and the bowl draws pressure when producing the harmomegathus because of factors such as temperature influence, and this buffer structure of accessible subducts, avoids drawing pressure to cause reflection side fold and influence optical effect. The direct type backlight module using the buffer type reflecting cover has the advantages that under the condition that the cost is not increased, the buffer structure with a simple structure is arranged on the reflecting cover, so that the backlight module is more stable, the light effect problem caused by the expansion and shrinkage of the reflecting cover is effectively prevented, and the brightness uniformity is improved.

Other technical effects of the utility model point out in the specification in combination with specific structure.

Drawings

Fig. 1 is an exploded view of a direct type backlight module according to the present invention;

fig. 2 is a schematic cross-sectional partial structure view of a direct type backlight module according to a first embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a top view of the buffering reflector according to the first embodiment of the present invention when only lateral force is applied to the buffering reflector;

fig. 5 is a top view of a buffering type reflector according to a first embodiment of the present invention when only longitudinal force is applied;

fig. 6 is a top view of the buffer type reflection cover according to the first embodiment of the present invention when it is simultaneously subjected to longitudinal and lateral forces;

fig. 7 is a schematic cross-sectional partial structure view of a direct type backlight module according to a second embodiment of the present invention;

FIG. 8 is an enlarged view of portion B of FIG. 7;

fig. 9 is a top view of the buffer reflector according to the second embodiment of the present invention when only lateral force is applied to the buffer reflector;

fig. 10 is a top view of the buffer reflector according to the second embodiment of the present invention when only longitudinal force is applied;

fig. 11 is a top view of a buffer type reflection cover according to the second embodiment of the present invention when being subjected to longitudinal and lateral forces.

Wherein the reference numerals have the following meanings:

1. a reflector; 11. a reflective cup; 111. a reflective side surface; 112. a light exit hole; 12. a buffer structure; 2. a circuit board; 3. a light emitting element; 4. a diffusion plate; 5. an optical film.

Detailed Description

For better understanding and implementation, 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.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example one

Referring to fig. 2-6, the utility model discloses a buffering formula bowl, including a plurality of reflection cups 11, reflection cup 11 includes a plurality of reflection sides 111 that connect gradually in proper order, and the junction tip of two adjacent reflection sides 111 of two adjacent reflection cups 11 is equipped with buffer structure 12 to draw pressure when subducing harmomegathus between a plurality of reflection cups 11, draw pressure when bowl 1 produces harmomegathus because of factors such as temperature influence promptly, this buffer structure 12 of accessible subducts, avoids drawing pressure to cause reflection sides 111 fold and influence optical effect.

Referring to fig. 4-6, as an alternative embodiment, in the embodiment of the present invention, the buffering structure 12 is an opening, that is, the ends of the joint between two adjacent reflecting sides 111 are not connected together, and when the buffering structure is deformed by a pulling pressure, the opening is formed, so that the pulling pressure can be reduced, and the reflecting sides 111 can be prevented from being wrinkled. Specifically, two ends of a joint of two adjacent reflecting side surfaces 111 of two adjacent reflecting cups 11 are provided with openings, so that four adjacent openings are connected to form a cross-shaped opening. When the circuit board 2 is arranged as a lamp, the cross-shaped opening can uniformly reduce the pulling pressure, the inclination angle of the reflecting side surface 111 is kept the same, the uniformity of the brightness is not influenced, and the function of buffering the deformation can also be achieved.

Referring to fig. 4-6, as an alternative embodiment, in the embodiment of the present invention, the length of the opening is 1/4-1/3 of the length of the joint between two adjacent reflecting sides 111. The opening is located at the end of the connection between two adjacent reflecting side surfaces 111, and if the length of the opening is too long, the connection is easily broken along the opening completely to cause damage to the reflector 1 when a large tensile stress is applied. It is necessary to limit the length of the opening, maintain the stability of the bowl 1, and avoid cracking of the bowl 1.

Referring to fig. 2 and fig. 4-6, as an alternative embodiment, in the embodiment of the present invention, a plurality of reflective cups 11 are arranged in an array, so that the reflective cover 1 formed by the reflective cups 11 can be matched with the light emitting elements 3 on the circuit board 2 in the backlight module, and is easy to manufacture.

Referring to fig. 2 and fig. 4-6, as an alternative embodiment, in the embodiment of the present invention, the bottom of the reflective cup 11 is provided with a light outlet 112. The light exit hole 112 is provided corresponding to the light emitting element 3, so that the light generated by the light emitting element 3 can pass through the light exit hole 112 on the reflection cover 1 and exit. Usually, one light emitting hole 112 is disposed at the bottom of one reflector 11 corresponding to one light emitting device 3, or a plurality of light emitting holes 112 are disposed at the bottom of one reflector 11 corresponding to a plurality of light emitting devices 3, so that the brightness in the reflector 11 is brighter, and the reflective area of the reflector can be utilized to the maximum.

Referring to fig. 1, the present invention also discloses a direct type backlight module, which comprises a circuit board 2, a light emitting element 3, a diffusion plate 4, an optical film 5 and a reflector 1; the circuit board 2, the light emitting element 3, the diffusion plate 4 and the optical film 5 are sequentially arranged in sequence, the reflection cover 1 is arranged between the circuit board 2 and the diffusion plate 4, and the light emitting element 3 is arranged in the light outlet hole 112 of the reflection cup 11. The direct type backlight module using the reflecting cover 1 has the advantages that under the condition that the cost is not increased, the buffer structure 12 with a simple structure is arranged on the reflecting cover 1, so that the backlight module is more stable, the light efficiency problem caused by expansion and contraction of the reflecting cover 1 is effectively prevented, and the brightness uniformity is improved.

Specifically, as an optional implementation manner, in the embodiment of the present invention, the optical film 5 includes a diffusion film, a fluorescent film, a lower brightness enhancement film, and an upper brightness enhancement film, which are sequentially connected in sequence, and the diffusion film is connected to the diffusion plate 4.

Example two

Referring to fig. 7-11, the difference between the second embodiment and the first embodiment is that, in particular, an opening is formed at one end of the joint of two adjacent reflecting side surfaces 111 of two adjacent reflecting cups 11, so that two adjacent openings are connected to form a linear opening. Can form a plurality of linear type opening in a bowl 1, a plurality of linear type opening is the interval setting of crossing anyhow, is provided with like this and does benefit to when circuit board 2 sets up to a subregion of many lamps, and a plurality of light emitting component 3 are in same reflection cup 11, and light luminance is big, and can adapt to the reflection side 111 and lead to the different condition of angle of locating because of drawing pressure changes, can make bowl 1 maintain luminance homogeneity, also can play the effect that the buffering warp.

The technical means disclosed in the present invention is not limited to the technical means disclosed in the above embodiments, but also includes the technical solution formed by combining the above technical features at will. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims (10)

1. A cushioned bowl comprising a plurality of reflector cups (11), said reflector cups (11) comprising a plurality of sequentially connected reflector sides (111), wherein:

the end part of the joint of two adjacent reflecting side surfaces (111) of two adjacent reflecting cups (11) is provided with a buffer structure (12) so as to reduce the tension and compression force between the reflecting cups (11) during expansion and contraction.

2. The cushioned radome of claim 1 wherein the cushioning structure (12) is an opening.

3. The buffering type reflex housing according to claim 2, wherein the two ends of the joint of the two adjacent reflecting side surfaces (111) of the two adjacent reflecting cups (11) are provided with openings, so that the four adjacent openings are connected to form a cross-shaped opening.

4. The buffering type reflex housing according to claim 2, wherein an end portion of a joint of two adjacent reflecting side surfaces (111) of two adjacent reflecting cups (11) is provided with an opening, so that two adjacent openings are connected to form a linear opening.

5. The cushioned reflector of claim 4, wherein a plurality of said linear openings are spaced apart laterally and vertically.

6. The cushioned reflector of any of claims 2-5, wherein said opening has a length 1/4-1/3 of the length of the junction of adjacent said reflective sides (111).

7. The cushioned reflector of claim 6, wherein a plurality of said reflector cups (11) are arranged in an array.

8. The buffer type reflex housing according to claim 7, wherein the bottom of the reflex cup (11) is provided with a light outlet hole (112).

9. A direct type backlight module comprising a circuit board (2), a light emitting element (3), a diffuser plate (4) and an optical film (5), characterized by further comprising a reflection cover (1) according to any one of claims 1 to 8;

the circuit board (2), the light-emitting element (3), the diffusion plate (4) and the optical membrane (5) are sequentially arranged, the reflection cover (1) is arranged between the circuit board (2) and the diffusion plate (4), and the light-emitting element (3) is arranged in the light outlet hole (112) of the reflection cup (11).

10. A direct type backlight module according to claim 9, wherein the optical film (5) comprises a diffuser film, a fluorescent film, a lower light enhancement film and an upper light enhancement film sequentially connected in sequence, and the diffuser film is connected with the diffuser plate (4).

Images