Reflective lampshade of backlight module

Abstract

The invention discloses a reflective lampshade of a backlight module, comprising a plurality of reflective units (1) arranged in an array, each of the reflective units (1) comprising a bottom opening (11) and a side wall (12), the side wall (12) being arranged around the bottom opening (11), the side wall (12) and the plane where the bottom opening (11) is located forming an acute angle; the top (121) of the side wall (12) has an arc-shaped structure in longitudinal section. By providing the top (121) of the arc-shaped structure, the contact surface between the reflective lampshade and the diffuser plate above can be reduced when the reflective lampshade is installed, thereby reducing the shadow on the backlight module and improving the uniformity of the light emission of the backlight module.

Description

Technical Field

[0001] The invention relates to the technical field of backlight module components, and in particular to a reflective lampshade of a backlight module. Background Art

[0002] The backlight module is a component that provides backlight 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 general liquid crystal displays, the conventional direct-down or side-entry backlight module can meet the requirements of brightness and uniformity. However, for some liquid crystal displays with higher requirements for brightness and uniformity, the conventional direct-down or side-entry backlight module cannot meet them and needs further improvement. Adding a reflective lampshade to the conventional direct-down backlight module is an improvement method. The light-emitting lampshade can make the light of each LED shine more toward one side of the diaphragm of the backlight module, thereby making full use of the light emitted by each LED, thereby increasing the brightness; at the same time, the reflective lampshade controls the light-emitting angle of each LED, making it easier to control the light uniformity of the backlight module. However, the existing reflective lampshade is prone to forming cross shadows between the four light-emitting units, which is not conducive to further improving the light uniformity of the backlight module. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a reflective lampshade for improving a backlight module in view of the deficiencies in the background technology.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a reflective lampshade of a backlight module, comprising a plurality of reflective units arranged in an array, each of the reflective units comprising a bottom opening and a side wall, the side wall being arranged around the bottom opening, the side wall forming an acute angle with the plane where the bottom opening is located; the longitudinal section of the top of the side wall is an arc-shaped structure.

[0005] Furthermore, the inner side surface of the side wall is a slope structure or a curved structure.

[0006] Furthermore, a transition surface is provided between the lower structure of the side wall and the wall top.

[0007] Furthermore, a plurality of arc-shaped grooves are provided on the upper portion of the side wall.

[0008] Furthermore, the side wall is provided with two groups of side wall structures in the horizontal and vertical directions respectively, and the four groups of side wall structures form the side wall, and each group of the side wall is provided with a plurality of arc-shaped grooves, and bulges are formed between adjacent arc-shaped grooves.

[0009] Furthermore, the arc-shaped groove on the transverse side wall structure is different in size from the arc-shaped groove on the longitudinal transverse side wall structure.

[0010] Furthermore, arcuate grooves of different sizes are arranged on the side wall on the same side, and the arcuate grooves of different sizes are arranged in sequence and spaced apart.

[0011] Furthermore, the reflective lampshade includes a plurality of monomers, the plurality of monomers are spliced ​​together to form the reflective lampshade, and the seams between adjacent monomers are arranged between adjacent reflective units.

[0012] Furthermore, a connecting structure is provided between adjacent monomers.

[0013] Furthermore, the connection structure is an L-shaped structure, a U-shaped structure or a plug-and-socket structure that matches each other and is arranged on the connection surfaces of two adjacent monomers.

[0014] The beneficial effects achieved by the present invention are mainly as follows: each side wall of the reflective lampshade forms an acute angle with the plane where the bottom opening is located, and the longitudinal section of the top of the side wall is an arc-shaped structure, so that the top of the arc-shaped structure contacts the diffusion plate when the backlight module is assembled, the contact surface between the reflective lampshade and the upper diffusion plate is reduced when the reflective lampshade is installed, and there are fewer shadow areas on the diffusion plate where no light reaches. The light emitted by the LED light source in the reflective unit can basically reach the entire diffusion plate through reflection from the side wall, thereby eliminating the shadows at the top of the side wall of the backlight module and the cross intersection of adjacent wall tops, and improving the uniformity of the light emission of the backlight module by improving the reflector structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the reflective lampshade in the first embodiment of the present invention;

[0016] Figure 2 It is a schematic diagram of the longitudinal cross-sectional structure of a reflective unit of a reflective lampshade in the first embodiment of the present invention;

[0017] Figure 3 Schematic diagram of the longitudinal cross-sectional structure of a reflective unit of another reflective lampshade in the first embodiment of the present invention;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of a reflective lampshade in the second embodiment of the present invention;

[0019] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of the middle part A;

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of another reflective lampshade in the second embodiment of the present invention;

[0021] Figure 7 for Figure 6 The enlarged structural diagram of the middle B part;

[0022] Figure 8It is a structural schematic diagram of a single-body joint of a reflective lampshade in Embodiment 3 of the present invention;

[0023] Fig. 9 It is a structural schematic diagram of a single-body joint of another reflective lampshade in the third embodiment of the present invention;

[0024] Fig.10 The figure is a schematic structural diagram of a single-body joint of another reflective lampshade in the third embodiment of the present invention.

[0025] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The same or similar numbers correspond to the same or similar parts. The terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0026] To facilitate understanding by those skilled in the art, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] Embodiment 1

[0028] See also Figures 1 to 3 A reflective lampshade of a backlight module includes a plurality of reflective units 1 arranged in an array. The transverse cross-section of the reflective unit 1 is generally a quadrilateral structure, so that it can adapt to LEDs with square light-emitting surfaces, especially the latest LEDs that emit light on all four sides and five sides at the top at the same time. The size and depth of the reflective unit 1 are set according to the matched LED light source, and the number and position of the reflective units on the reflective lampshade are set according to the array layout of the LED light source in the backlight module, so as to ensure that each LED corresponds to exactly one reflective unit. The reflective lampshade is generally injection molded by plastic material, and can be injection molded by white material with good reflective performance. It is best to further coat the injection molded reflective lampshade with a silver layer or other reflective material to further improve the reflective performance of the lampshade, so that the brightness of the module can be improved when the lampshade is installed on the backlight module. It is best to set a reinforcing frame 13 on the outside of the reflective lampshade. The reinforcing frame 13 is a frame-shaped structure, which can improve the strength of the reflective lampshade and facilitate the installation of the reflective lampshade and the backlight module.

[0029] See also Figures 1 to 3The structure of a single reflective unit 1 is as follows: it includes a bottom opening 11 and a side wall 12, and the side wall 12 is arranged around the bottom opening 11. The angle α between the side wall 12 and the plane where the bottom opening 11 is located is an acute angle, preferably an acute angle between 30° and 90°, which can be applicable to LEDs commonly found in the market. For the structure of the opening 11, the entire bottom surface of the reflective unit 1 can be left empty as the bottom opening 11, or only a small hole can be opened at the bottom of the reflective unit 1 to expose the LED light source 3 on the LED light board. The specific selection can be based on the structure of the LED light source used. When the light-emitting part of the LED light source is low, the former structure can be used, and when the light-emitting part of the LED light source is high, both structures can be used. For the structure of the side wall 12, two groups of side wall structures are respectively arranged in the horizontal and vertical directions, and four groups of side wall structures surround the side wall 12; for two adjacent reflective units 1, the side wall 12 between the two is a common structure, and the surfaces on both sides of the side wall 12 are respectively used as the reflective surfaces of the two reflective units 1.

[0030] See also Figure 2 and 3 The longitudinal section of the wall top 121 of the side wall 12 is an arc-shaped structure, and a smoothly transitioned curved surface structure can also be adopted, so that the contact surface between the wall top 121 and the diffuser plate thereon is reduced when installed, and there are fewer shadow areas where no light reaches. The light emitted by the LED light source in the reflective unit 1 can basically reach the entire diffuser plate through reflection from the side wall 12, thereby eliminating the shadows at the cross intersection of the wall top 121 of the side wall 12 of the backlight module and the adjacent wall tops 121, and improving the uniformity of the light emission of the backlight module by improving the reflector structure.

[0031] See also Figure 2 and Figure 3 The inner side surface of the side wall 12 is a slope structure or a curved structure, and both methods are acceptable. Figure 2 FIG. 4 shows that the inner side surface of the side wall 12 adopts a slope structure. Figure 3 The inner side surface of the side wall 12 is preferably a curved surface structure, which has a continuously changing reflective surface, so that when the light is emitted from the LED and reaches the diffuser, there are more reflective surfaces at different angles, so that the light can reach various positions of the diffuser, and the uniformity of the light emission of the backlight module can be enhanced.

[0032] See also Figure 2 and Figure 3It is best to set a transition surface 123 between the lower structure 122 of the side wall 12 and the wall top 121. It can be set as a slope structure or a curved surface, so as to avoid that the angle of the lower structure 122 and the angle of the wall top 121 change too much, and avoid the problem of bright or dark strips generated after the convex or concave angle at the intersection of the lower structure 122 and the wall top 121 reflects the light emitted by the LED light source, so that the reflective lampshade can further improve the uniformity of the backlight module's light emission.

[0033] Embodiment 2

[0034] See also Figures 4 to 7 The reflective lampshade of this embodiment is further improved and optimized on the basis of the first embodiment. In this embodiment, the upper part of the side wall 12 is provided with a plurality of arc grooves 124. One arc groove 124 can be provided on each side of the side wall 12, or a plurality of arc grooves 124 can be provided. It is preferred to provide a plurality of arc grooves 124 on each side of the side wall 12, and a protrusion 125 is formed between adjacent arc grooves 124. The arc groove 124 can further reduce the contact area between 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 groove 124 from one reflective unit 1 to another reflective unit 1, so that the backlight module emits light more evenly; the protrusion 125 is used to support the diffusion plate on the upper part thereof, and can also play a shading role, improving the problem of partial brightness of the backlight module; in short, the problem of partial darkness of the backlight module is improved by the arc groove 124, and the problem of partial brightness of the backlight module is improved by the protrusion 125, and the two can cooperate to make the backlight module emit light more evenly.

[0035] See also Figure 6 and 7 As a further improvement, the arc-shaped groove 124 on the transverse side wall structure and the arc-shaped groove 124 on the longitudinal side wall structure can be set to structures of different sizes, for example Figure 7 It is shown that the transverse arc groove 124a is smaller and the longitudinal arc groove 124b is larger, and the corresponding transverse protrusion 125a is larger and the longitudinal protrusion 125b is smaller; thus, the amount of light reaching from one reflective unit 1 to another reflective unit 1 is adjusted by the size of the arc groove 124, and the uniformity of the light emission of the backlight module is further fine-tuned. Figure 7 , the arc groove 124 on the horizontal side wall 12 is smaller than the arc groove 124 on the vertical side wall 12. The arc grooves 124 on the side wall 12 on the same side can also be set to different sizes, and the arc grooves 124 of different sizes are arranged in sequence, so as to further fine-tune the uniformity of the backlight module light emission.

[0036] Embodiment 3

[0037] See also Figures 8-10The reflective lampshade of this embodiment is further improved and optimized on the basis of the second embodiment. For a larger backlight module, the reflective lampshade required is also larger. It is inconvenient to use a reflective lampshade with an integral structure for processing, molding, transportation, etc. Therefore, multiple monomers 2 are provided, and multiple monomers 2 are spliced ​​to form a reflective lampshade, so as to facilitate injection molding and transportation. The seams between adjacent monomers 2 are provided between adjacent reflective units 1, specifically between adjacent side walls 12 of two adjacent monomers 2, thereby avoiding the influence of the seams on the uniformity of light emission of the backlight module.

[0038] A connection structure 21 is provided on the adjacent side walls between adjacent monomers 2, and the adjacent monomers 2 are connected together through the connection structure 21. The adjacent monomers 2 can be set as a plane, and a colloid such as a double-sided adhesive is used as the connection structure 21 to bond two adjacent monomers 2 together. The connection structure 21 between adjacent monomers 2 preferably adopts one of the following methods:

[0039] like Figure 8 In the embodiment, the connection structure 21 is a mutually matching L-shaped structure (the longitudinal cross section of the connection is L-shaped) arranged on the connection surfaces of two adjacent monomers 2, so that the two adjacent monomers 2 are better fixed and less likely to be misaligned; Fig. 9 The figure shows the mutually matching U-shaped structures (the longitudinal cross section of the connection is U-shaped) arranged on the connecting surfaces of two adjacent monomers 2, so that the two can bite each other and are not easily misaligned or separated; Fig.10 The figure shows a plug-and-socket structure matching each other on the connecting surfaces of two adjacent monomers 2. A plug is provided on one monomer 2 and a socket is provided on the other monomer 2. The plug and the socket match each other. One monomer 2 can be plugged into the socket of another monomer 2 through the plug, so that the two monomers become an integrated structure. The above structure can ensure the integrity of multiple monomers connected into a reflective lampshade, thereby facilitating the production and transportation of the luminous lampshade and ensuring the uniformity of the light emission of the backlight module.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A reflective lampshade of a backlight module, characterized in that: The invention comprises a plurality of reflective units (1) arranged in an array, each of the reflective units (1) comprising a bottom opening (11) and a side wall (12), the side wall (12) being arranged around the bottom opening (11), the side wall (12) forming an acute angle with a plane where the bottom opening (11) is located; the top (121) of the side wall (12) has an arc-shaped structure in longitudinal section; A plurality of arc-shaped grooves (124) are provided on the upper portion of the side wall (12); The side wall (12) is provided with two groups of side wall structures in the horizontal and vertical directions respectively, and the four groups of side wall structures surround the side wall (12), and each group of the side wall (12) is provided with a plurality of arc-shaped grooves (124), and protrusions (125) are formed between adjacent arc-shaped grooves (124); The arc-shaped groove (124) on the transverse side wall structure is different in size from the arc-shaped groove (124) on the longitudinal transverse side wall structure; The side wall (12) on the same side is provided with arc-shaped grooves (124) of different sizes, and the arc-shaped grooves (124) of different sizes are arranged in sequence and at intervals; The side wall (12) comprises a lower structure (122), a transition surface (123) and a wall top (121); The inner side surface of the lower structure (122) of the side wall (12) is a sloped structure; The transition surface (123) is arranged between the lower structure (122) and the wall top (121) of the side wall (12), and the transition surface (123) is used to prevent the convex or concave corners at the intersection of the lower structure (122) and the wall top (121) from reflecting light emitted by the light source; The reflective lampshade comprises a plurality of monomers (2), the plurality of monomers (2) being spliced ​​together to form the reflective lampshade, and the seams between adjacent monomers (2) being arranged between adjacent reflective units (1); A connecting structure (21) is provided between adjacent monomers (2); The connection structure (21) is a mutually matching L-shaped structure, U-shaped structure or plug-in socket structure arranged on the connection surfaces of two adjacent monomers (2).

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