CN210720948U

CN210720948U - Reflecting lampshade of backlight module

Info

Publication number: CN210720948U
Application number: CN201921137946.7U
Authority: CN
Inventors: 罗增昌; 姚志图; 黄磊; 刘启玉; 贺成林; 彭环洋
Original assignee: HUIZHOU WAI CHI ELECTRONICS Ltd
Current assignee: HUIZHOU WAI CHI ELECTRONICS Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-06-09
Anticipated expiration: 2029-07-19

Abstract

The utility model discloses a reflecting lamp shade of a backlight module, which comprises a plurality of reflecting units (1) arranged in an array, wherein each reflecting unit (1) comprises a bottom opening (11) and a side wall (12), the side wall (12) is enclosed around the bottom opening (11), and the plane where the side wall (12) and the bottom opening (11) are located is an acute angle; the vertical section of the top wall (121) of the side wall (12) is of an arc-shaped structure. Through the wall top (121) with the arc-shaped structure, the contact surface between the reflecting lamp shade and the upper diffusion plate during installation can be reduced, so that shadows on the backlight module are reduced, and the uniformity of light emission of the backlight module is improved.

Description

Reflecting lampshade of backlight module

Technical Field

The utility model relates to a backlight unit spare part technical field, concretely relates to backlight unit's reflection of light lamp shade.

Background

The backlight module is a component for providing backlight source for the liquid crystal display, the brightness and uniformity of the liquid crystal display are determined by the brightness and uniformity of the backlight module, for the general liquid crystal display, the requirements of the brightness and uniformity can be met by adopting the conventional direct type or side type backlight module, but for the liquid crystal display with higher requirements of the brightness and uniformity, the conventional direct type or side type backlight module can not meet the requirements, and needs to be further improved. The addition of the reflective lamp shade on the conventional direct type backlight module is an improved mode, and the light emitted by each LED can be more irradiated to one side of the diaphragm of the backlight module through the light-emitting lamp shade, so that the light emitted by each LED is fully utilized, and the brightness is increased; meanwhile, the light-emitting angle of each LED is controlled by the reflecting lampshade, so that the light-emitting uniformity of the backlight module is easier to control. However, the conventional reflective lampshade easily forms a cross shadow among the four light-emitting units, which is not beneficial to further improving the light-emitting uniformity of the backlight module.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to not enough in the background art, provide a can improve reflective lamp cover that backlight unit used.

In order to solve the technical problem, the technical scheme of the utility model is that: a reflecting lamp shade of a backlight module comprises a plurality of reflecting units arranged in an array, wherein each reflecting unit comprises a bottom opening and a side wall, the side wall surrounds the bottom opening, and an acute angle is formed between the side wall and the plane of the bottom opening; the top longitudinal section of the side wall is of an arc-shaped structure.

Furthermore, the inner side surface of the side wall is of a bevel structure or a cambered surface structure.

Furthermore, a transition surface is arranged between the lower structure of the side wall and the wall top.

Further, a plurality of arc-shaped grooves are formed in the upper portion of the side wall.

Furthermore, the side walls are respectively provided with two groups of side wall structures in the transverse and vertical directions, the four groups of side wall structures enclose the side walls, each group of side walls are provided with a plurality of arc-shaped grooves, and protrusions are formed between adjacent arc-shaped grooves.

Further, the size of the arc-shaped groove on the transversely arranged side wall structure is different from that of the arc-shaped groove on the vertically arranged side wall structure.

Further, arc grooves with different sizes are arranged on the lateral wall on the same side in the horizontal or vertical direction, and the arc grooves with different sizes are sequentially arranged at intervals.

Further, the light reflecting lampshade comprises a plurality of single bodies, the single bodies are spliced to form the light reflecting lampshade, and the seam between the adjacent single bodies is arranged between the adjacent light reflecting units.

Further, a connecting structure is arranged between the adjacent single bodies.

Furthermore, the connecting structure is an L-shaped structure, a U-shaped structure or a plug jack structure which are matched with each other and are arranged on the connecting surfaces of the two adjacent single bodies.

The utility model discloses the beneficial effect who realizes mainly has following several: each side wall of the reflecting lamp cover and the plane where the bottom hole is located form an acute angle, and the wall top longitudinal section of the side wall is of an arc-shaped structure, so that the top of the arc-shaped structure is in contact with the diffusion plate when the backlight module is assembled, the contact surface of the reflecting lamp cover and the diffusion plate above the reflecting lamp cover is reduced when the reflecting lamp cover is installed, shadow parts without light reaching on the diffusion plate are few, light emitted by the LED light source in the reflecting unit can basically reach the whole diffusion plate through reflection of the side wall, shadow at the cross joint of the wall top of the side wall of the backlight module and the adjacent wall top can be eliminated, and the uniformity of light emission of the backlight module is improved.

Drawings

Fig. 1 is a schematic perspective view of a reflective lamp cover according to an embodiment of the present invention;

fig. 2 is a schematic longitudinal sectional structure view of a light reflecting unit of a light reflecting lampshade according to an embodiment of the present invention;

fig. 3 is a schematic longitudinal sectional view of a light reflecting unit of another light reflecting lampshade according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a reflective lamp cover according to a second embodiment of the present invention;

FIG. 5 is an enlarged view of the portion A of FIG. 4;

fig. 6 is a schematic perspective view of another reflective lampshade according to the second embodiment of the present invention;

FIG. 7 is an enlarged view of the portion B of FIG. 6;

fig. 8 is a schematic structural view of a single body splicing part of a reflective lamp cover in a third embodiment of the present invention;

fig. 9 is a schematic structural view of a single body splicing part of another reflective lampshade in the third embodiment of the present invention;

fig. 10 is a schematic structural view of a single body splicing part of another reflective lampshade in the third embodiment of the present invention.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

To facilitate understanding for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1 to 3, a reflective lampshade of a backlight module comprises a plurality of reflective units 1 arranged in an array, and the transverse section of each reflective unit 1 is generally of a quadrilateral structure, so that the reflective lampshade can adapt to an LED with a square light emitting surface, and is particularly suitable for the latest LED with five surfaces on the periphery and the top to emit light simultaneously. The size and the depth of the light reflecting units 1 are set according to the matched LED light sources, and the number and the positions of the light reflecting units on the light reflecting lampshade are set according to the array layout of the LED light sources in the backlight module, so that each LED just corresponds to one light reflecting unit. The reflecting lampshade is generally formed by injection molding of plastic materials, can be formed by injection molding of white materials with better reflecting performance, and is preferably further coated with reflecting materials such as silver layers and the like, so that the reflecting performance of the lampshade is further improved, and the brightness of the module can be improved when the lampshade is installed on the backlight module. The outer side of the light reflecting lampshade is preferably provided with a reinforced frame 13, and the reinforced frame 13 is of a frame-shaped structure, so that the strength of the light reflecting lampshade can be improved, and the light reflecting lampshade and the backlight module can be conveniently installed.

Referring to fig. 1 to 3, a single light reflecting unit 1 has a structure including a bottom opening 11 and side walls 12, the side walls 12 are arranged around the bottom opening 11, an included angle α between the side walls 12 and a plane of the bottom opening 11 is an acute angle, preferably an acute angle between 30 degrees and 90 degrees, and is applicable to common LEDs in the general market, for the structure of the opening 11, the whole bottom surface of the light reflecting unit 1 can be opened as the bottom opening 11, or only a small hole is formed in the bottom of the light reflecting unit 1 to expose an LED light source 3 on an LED lamp panel, specifically, the structure of the LED light source can be selected according to the adopted structure, the former structure can be adopted when the light emitting part of the LED light source is lower, and the two structures can be adopted when the light emitting part of the LED light source is higher, for the structure of the side walls 12, two sets of side wall structures are respectively arranged in the horizontal and vertical directions, the four sets of the side wall structures enclose the side walls 12, for the two adjacent light reflecting units 1, the side walls 12 between the two adjacent.

Referring to fig. 2 and 3, the top wall 121 of the sidewall 12 has an arc-shaped longitudinal cross section, or may have a smooth transition curved surface structure, so that when the top wall 121 is mounted with a diffuser plate thereon, the contact surface is reduced, and there are few dark shadow portions where no light reaches, and the light emitted from the LED light source in the light reflecting unit 1 can reach the whole diffuser plate through the reflection of the sidewall 12, thereby eliminating the dark shadow at the cross of the top wall 121 of the sidewall 12 of the backlight module and the adjacent top wall 121, and improving the uniformity of the light emission of the backlight module through the improvement of the reflector structure.

Referring to fig. 2 and 3, the inner side surface of the side wall 12 is of a slope structure or an arc structure, and both the slope structure and the arc structure may be adopted, for example, fig. 2 shows that the inner side surface of the side wall 12 adopts the slope structure, and fig. 3 shows that the inner side surface of the side wall 12 adopts the arc structure. The inner side surface of the side wall 12 is preferably of an arc-shaped structure, the arc-shaped structure is provided with a continuously-changing reflecting surface, so that the light rays can reach the diffusing plate from the LED and have more reflecting surfaces with different angles, and can reach all positions of the diffusing plate, and the uniformity of light emission of the backlight module can be enhanced.

Referring to fig. 2 and 3, a transition surface 123 is preferably disposed between the lower structure 122 of the side wall 12 and the wall top 121, and may be a slope structure or an arc surface, so as to avoid a large change in the angle between the lower structure 122 and the wall top 121, and avoid a problem that a light beam emitted from the LED light source is reflected by a protrusion or a concave angle at a junction between the lower structure 122 and the wall top 121 to generate a bright strip or a dark strip, so that the light-reflecting shade can further improve the uniformity of light emission of the backlight module.

Example two

Referring to fig. 4 to 7, the reflective lamp cover of the present embodiment is further improved and optimized based on the first embodiment, in the present embodiment, the upper portion of the side wall 12 is provided with a plurality of arc-shaped grooves 124, one or more arc-shaped grooves 124 may be provided on the side wall 12 of each side, preferably, a plurality of arc-shaped grooves 124 are provided on the side wall 12 of each side, and a protrusion 125 is formed between adjacent arc-shaped grooves 124. The arc-shaped groove 124 can further reduce the contact area of the side wall 12 and the diffusion plate, so that the light receiving area on the diffusion plate is larger; and the light can pass through the arc-shaped groove 124 from one light reflecting unit 1 to the other light reflecting unit 1, so that the backlight module emits light more uniformly; the protrusion 125 is used to support the diffusion plate on the upper portion, and also can play a role of shading light, improving the problem of local brightness of the backlight module; in short, the problem of local darkness of the backlight module is improved by the arc-shaped groove 124, and the problem of local brightness of the backlight module is improved by the protrusion 125, which are matched together to make the backlight module emit light more uniformly.

As a further improvement, referring to fig. 6 and 7, the arcuate grooves 124 on the transversely disposed sidewall structures and the arcuate grooves 124 on the vertically disposed sidewall structures may be configured in different sized structures, for example, fig. 7 shows that the transverse arcuate grooves 124a are smaller, the longitudinal arcuate grooves 124b are larger, the corresponding transverse projections 125a are larger, and the longitudinal projections 125b are smaller; therefore, the amount of light reaching another light reflecting unit 1 from one light reflecting unit 1 is adjusted by the size of the arc-shaped groove 124, and the light emitting uniformity of the backlight module is further fine-tuned. The arcuate groove 124 on the lateral side wall 12 is shown in fig. 7 to be smaller than the arcuate groove 124 on the vertical side wall 12. The arc-shaped grooves 124 on the side wall 12 on the same side can also be set to have different sizes, and the arc-shaped grooves 124 with different sizes are sequentially arranged at intervals, so as to further fine tune the uniformity of the light emitted by the backlight module.

EXAMPLE III

Referring to fig. 8 to 10, the reflective lamp cover of the present embodiment is further improved and optimized based on the second embodiment. To great backlight unit, its required reflector is also great, and the reflection of light lamp shade that adopts an overall structure is inconvenient to machine-shaping, transportation etc. therefore set up a plurality of monomers 2, and a plurality of 2 splices of monomer form reflection of light lamp shade to make things convenient for injection moulding and transportation. The seam between adjacent single bodies 2 is arranged between adjacent light reflecting units 1, particularly between adjacent side walls 12 of two adjacent single bodies 2, so that the influence of the seam on the light emitting uniformity of the backlight module can be avoided.

Be provided with connection structure 21 on the adjacent lateral wall between adjacent monomer 2, link together adjacent monomer through connection structure 21, can set up to the plane between the adjacent monomer 2, adopt colloids such as double faced adhesive tape as connection structure 21, bond two adjacent monomers 2 together. The connecting structure 21 between the adjacent single bodies 2 preferably adopts one of the following ways:

as shown in fig. 8, the connecting structure 21 is an L-shaped structure (the longitudinal section of the connecting portion is L-shaped) which is arranged on the connecting surface of two adjacent single bodies 2 and is matched with each other, so that the two adjacent single bodies 2 are better fixed and are not easy to be dislocated; fig. 9 shows the mutually matched U-shaped structures (the longitudinal section of the joint is U-shaped) arranged on the joint surfaces of two adjacent single bodies 2, so that the two single bodies can be mutually engaged and are not easy to dislocate and separate; in fig. 10, a plug and jack structure which is arranged on the connecting surface of two adjacent single bodies 2 and is matched with each other is shown, a plug is arranged on one single body 2, a jack is arranged on the other single body 2, the plug and the jack are matched with each other, and one single body 2 can be inserted into the jack of the other single body 2 through the plug, so that the two single bodies form an integrated structure. Adopt above-mentioned structure all to guarantee that a plurality of monomers connect into the wholeness of a reflection of light lamp shade to make things convenient for the production transportation of luminous lamp shade, and guarantee the luminous homogeneity of backlight unit.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a backlight unit's reflection of light lamp shade which characterized in that: the light reflecting device comprises a plurality of light reflecting units (1) arranged in an array, wherein each light reflecting unit (1) comprises a bottom opening (11) and a side wall (12), the side wall (12) surrounds the bottom opening (11), and an acute angle is formed between the side wall (12) and the plane of the bottom opening (11); the vertical section of the top wall (121) of the side wall (12) is of an arc-shaped structure.

2. The light reflecting shade of backlight module as set forth in claim 1, wherein: the inner side surface of the side wall (12) is of a bevel structure or a cambered surface structure.

3. The light reflecting shade of backlight module as set forth in claim 2, wherein: a transition surface (123) is also arranged between the lower structure (122) of the side wall (12) and the wall top (121).

4. The reflection lampshade of the backlight module according to any one of the claims 1 to 3, characterized in that: the upper part of the side wall (12) is provided with a plurality of arc-shaped grooves (124).

5. The light reflecting shade of backlight module as set forth in claim 4, wherein: the side wall (12) is provided with two groups of side wall structures in the transverse and vertical directions respectively, the four groups of side wall structures enclose the side wall (12), each group of side wall (12) is provided with a plurality of arc-shaped grooves (124), and a protrusion (125) is formed between every two adjacent arc-shaped grooves (124).

6. The light reflecting lampshade of the backlight module as claimed in claim 5, wherein: the arc-shaped groove (124) on the side wall structure which is transversely arranged is different from the arc-shaped groove (124) on the side wall structure which is vertically arranged in size.

7. The light reflecting lampshade of the backlight module as claimed in claim 5, wherein: arc-shaped grooves (124) with different sizes are arranged on the side wall (12) on the same side in the horizontal or vertical direction, and the arc-shaped grooves (124) with different sizes are sequentially arranged at intervals.

8. The light reflecting shade of backlight module as set forth in claim 7, wherein: the light reflecting lampshade comprises a plurality of single bodies (2), the single bodies (2) are spliced to form the light reflecting lampshade, and the seam between the adjacent single bodies (2) is arranged between the adjacent light reflecting units (1).

9. The light reflecting shade of backlight module as set forth in claim 8, wherein: a connecting structure (21) is arranged between the adjacent single bodies (2).

10. The light reflecting shade of backlight module as set forth in claim 9, wherein: the connecting structure (21) is an L-shaped structure, a U-shaped structure or a plug jack structure which are matched with each other and are arranged on the connecting surface of the two adjacent monomers (2).