WO2024050937A1

WO2024050937A1 - Direct type backlight module having diffusion plate supporting function and display

Info

Publication number: WO2024050937A1
Application number: PCT/CN2022/127594
Authority: WO
Inventors: 张政德; 林家叶; 侯珮棻
Original assignee: 瑞仪(广州)光电子器件有限公司
Priority date: 2022-09-06
Filing date: 2022-10-26
Publication date: 2024-03-14
Also published as: CN220040923U

Abstract

A direct type backlight module having a diffusion plate (40) supporting function, and a display comprising the backlight module. The direct type backlight module comprises a frame (10), a reflective piece (20), at least one support member (30), a diffusion plate (40), and a plurality of light-emitting units (50). The frame (10) comprises a bottom plate (11) and at least one outer frame (12) provided at an edge of the bottom plate (11); the reflective piece (20) is provided on the bottom plate (11) and adjacent to the outer frame (12), and the reflective piece (20) comprises a plurality of reflective structures (21); the support member (30) is provided with a body portion (31) and at least one limiting portion (32), the body portion (31) is located above the reflective structures (21), and the limiting portion (32) extends downwards from the body portion (31), is provided on the reflective structures (21), and can allow light to pass through; and each light-emitting unit (50) is provided in each reflective structure (21) and is arranged to face the diffusion plate (40) provided on the body portion of the support member (30).

Description

Direct-type backlight module and display with diffusion plate support function

This application claims priority to the Chinese patent application with application number 202211081151.5 and the invention title "Direct-type backlight module and display with diffusion plate support function" submitted on September 6, 2022, which is hereby incorporated by reference. The entire contents are incorporated into this application.

Technical field

The present invention relates to a backlight module and a display, in particular to a direct-type backlight module with a diffusion plate support function that can improve edge dark bands and a display using the backlight module.

Background technique

As shown in Figure 9, today's direct backlight module 90 includes a frame, a reflective sheet 91, a middle plastic frame 92, a diffusion plate 93 and a plurality of light-emitting units 94. The outer frame 96 and the reflective sheet 91 are arranged on the back plate 95. The middle rubber frame 92 is located between the outer frame 96 and the reflective sheet 91. The diffusion plate 93 is carried by the middle rubber frame 92. A plurality of light-emitting units 94 are spaced apart on the reflective surface. The light is emitted from the film 91 toward the diffusion plate 93 so that the light exit side of the direct backlight module 90 emits light.

However, due to the influence of the thickness of the middle rubber frame 92, the distance between the reflective sheet 91 and the outer frame 96 is relatively far, resulting in the reflective sheet 91 and the light-emitting unit 94 being unable to deflect outward. Therefore, the light emitted by the light-emitting unit 94 is far from the direct downward direction. The edge of the direct-type backlight module 90 is far away and cannot be completely projected to the edge of the direct-type backlight module 90 . This causes the direct-type backlight module 90 to form a dark band 97 at the edge of the light exit side, resulting in uneven light emission.

Contents of the invention

The main purpose of the present invention is to provide a direct-type backlight module and display with a diffusion plate support function, hoping to improve the separation of the light-emitting unit and the reflective sheet caused by the middle plastic frame used to carry the diffusion plate in today's backlight modules. The edge of the backlight module is far away, resulting in the formation of dark bands at the edge of the current backlight module, resulting in the problem of uneven light emission.

In order to achieve the aforementioned purpose, the present invention provides a direct-type backlight module with a diffusion plate support function, including: a frame, which includes a bottom plate and at least one outer frame, and the outer frame is arranged on the edge of the bottom plate; and a reflective sheet, which is arranged on the bottom plate. , and adjacent to the outer frame, the reflective sheet includes multiple reflective structures, each reflective structure has a cup-shaped space; at least one support member, the support member has a body part and at least a limiting part, the body part is located in the reflective structure of the reflective sheet Above, the limiting part extends downward from the body part and is provided on the reflective structure of the reflective sheet, and can allow light to pass through; the diffusion plate is provided on the body part of the support member; and a plurality of light-emitting units, each emitting light The unit is arranged in the cup-shaped space of each reflective structure of the reflective sheet and is arranged towards the diffusion plate.

The diffuser plate of the backlight module of the present invention is carried by a support member, so there is no need to set up an additional middle plastic frame for carrying the diffuser plate in the backlight module, and the support member is provided on the reflective structure of the reflective sheet rather than on the reflective surface. between the sheet and the outer frame, so the reflective sheet can be placed adjacent to the outer frame, so that the light-emitting unit located in the reflective structure of the reflective sheet is placed close to the edge of the backlight module, and is assembled on the backlight module using a support member that allows light to pass through Above the reflective structure of the reflective sheet, the light emitted by the light-emitting unit can pass through the support without being blocked. Therefore, the light emitted by the light-emitting unit can be projected to the backlight module closer to the edge of the diffusion plate, and the backlight can be improved. The dark band at the edge of the module can improve the light uniformity of the backlight module and conform to the design trend of narrow bezels.

In order to achieve the aforementioned purpose, the present invention further provides a display including: a direct-type backlight module with a diffusion plate support function as mentioned above; and a display panel, which is provided on the direct-type backlight module with a diffusion plate support function. .

The display of the present invention can increase the light received by the edge of the display panel by applying a direct-type backlight module with a diffusion plate support function, thereby improving the light emission at the edge of the display, avoiding the occurrence of dark bands at the edge of the display, and thereby improving the uniformity of light emission. .

Description of the drawings

For a more complete understanding of the embodiments and their advantages, the following description now refers to the accompanying drawings.

FIG. 1 is a partially exploded perspective view of a diffusion plate of a preferred embodiment of a direct-type backlight module with a diffusion plate support function of the present invention.

FIG. 2 is a partial perspective view of the backlight module of the present invention without a diffusion plate.

3 is a partially exploded perspective view of the outer frame of the backlight module of the present invention.

4 is a partially exploded perspective view of the support member of the backlight module of the present invention.

FIG. 5 is a partial side cross-sectional schematic diagram of the backlight module of the present invention.

FIG. 6 is a schematic cross-sectional view along line A-A in FIG. 5 .

Fig. 7 is a schematic cross-sectional view taken along line B-B in Fig. 5 .

Figure 8 is a partial front cross-sectional schematic view of the display of the present invention.

FIG. 9 is a partial cross-sectional schematic diagram of a conventional backlight module.

Detailed ways

Please refer to FIG. 1 , which is a preferred embodiment of a direct-type backlight module with a diffusion plate support function of the present invention. It includes a frame 10 , a reflective sheet 20 , at least one support member 30 , a diffusion plate 40 and a plurality of light-emitting units 50 .

As shown in FIG. 1 , the frame 10 includes a base plate 11 and at least one outer frame 12 . The outer frame 12 is provided on the edge of the base plate 11 .

As shown in FIGS. 1 and 2 , the reflective sheet 20 is disposed on the bottom plate 11 and adjacent to the outer frame 12 . The reflective sheet 20 includes a plurality of reflective structures 21 , and each reflective structure 21 has a cup-shaped space 22 .

As shown in FIGS. 2 and 4 , the support member 30 has a body part 31 and at least one limiting part 32 . The body part 31 is located above the reflective structure 21 of the reflective sheet 20 . The limiting part 32 extends downward from the body part 31 and The reflective structure 21 and the support member 30 provided on the reflective sheet 20 can allow light to pass through.

As shown in FIGS. 1 and 5 , the diffuser plate 40 is disposed on the body portion 31 of the support member 30 . If the diffuser plate 40 is directly carried by the reflective sheet 20 , the diffuser plate 40 will be scratched and the structure of the reflective sheet 20 will be damaged. Affects optical taste.

As shown in FIGS. 1 and 2 , each light-emitting unit 50 is disposed in the cup-shaped space 22 of each reflective structure 21 of the reflective sheet 20 and is disposed toward the diffusion plate 40 so that the light emitted by the light-emitting unit 50 can be directed to the diffusion plate. 40.

The diffusion plate 40 of the backlight module of the present invention is carried by the support member 30. Therefore, there is no need to provide an additional middle plastic frame for carrying the diffusion plate 40 in the backlight module, and the support member 30 is provided on the reflection structure 21 of the reflection sheet 20. , instead of being disposed between the reflective sheet 20 and the outer frame 12, the reflective sheet 20 can be disposed adjacent to the outer frame 12, so that the light-emitting unit 50 is close to the edge of the backlight module, and the support 30 that allows light to pass through is used. Assembled above the reflective structure 21 of the reflective sheet 20 , the light emitted by the light emitting unit 50 can pass through the support 30 without being blocked. Therefore, the light emitted by the light emitting unit 50 can be projected to the edge of the backlight module closer to the diffusion plate 40 position, and effectively improve the dark band at the edge of the backlight module, thereby improving the light uniformity of the backlight module and conforming to the design trend of narrow borders. Preferably, the support member 30 is made of transparent material, thereby further ensuring the light intensity of the backlight module. In addition, the backlight module can include multiple support members 30 , and the multiple support members 30 can be spaced apart on different reflective structures 21 . By using the multiple support members 30 to jointly support the diffusion plate 30 , the structural stability of the backlight module can be improved. sex.

In addition, as shown in FIGS. 1 to 4 , there is an edge 23 between each two adjacent reflective structures 21 . The limiting portion 32 of the support 30 is provided on the edge 23 . The limiting portion 32 is provided on the edge 23 . Between two adjacent reflective structures 21 and located at the edge of the cup-shaped space 22 of the reflective structure 21, the impact of the support member 30 on the shape integrity of the cup-shaped space 22 of the reflective structure 21 can be reduced, thereby avoiding the impact The reflective structure 21 reflects light. Among them, the plurality of reflective structures 21 are arranged in a matrix, which are respectively arranged along the first direction D1 and the second direction D2 that are not parallel to each other. There is a gap between each two adjacent reflective structures 21 arranged along the second direction D2. There is at least one first edge 231, and there is at least one second edge 232 between each two adjacent reflective structures 21 arranged along the first direction D1. The first edge 231 is parallel to the first direction D1, and the second edge is parallel to the first edge 231. The edge portion 232 is parallel to the second direction D2. The edge portion 23 extending along the first direction D1 is the first edge portion 231. The edge portion 23 extending along the second direction D2 is the second edge portion 232. The support member 30 has The limiting portion 32 can be selectively provided on the first edge portion 231 or the second edge portion 232 to position the support member 30 along at least one of the first direction D1 and the second direction D2, thereby lifting the support member 30. Positioning stability. Preferably, the first direction D1 and the second direction D2 are perpendicular to each other, thereby improving the manufacturing convenience of the reflective sheet 20 and improving the positioning effect of the support member 30 .

Preferably, the body portion 31 of the support member 30 is in a long strip shape and can be straddled on multiple reflective structures 21, thereby improving the support effect. More preferably, the support member 30 has a plurality of limiting portions 32. The two limiting parts 32 are respectively provided on different reflective structures 21, thereby improving the stability of the assembly. In addition, as shown in FIGS. 1 to 4 , when the plurality of limiting portions 32 of the support member 30 are arranged at intervals along the first direction D1 and are provided on the second edge portion 232 , the body portion 31 of the support member 30 moves along the first direction D1 . The first direction D1 extends. When the plurality of limiting portions 32 of the support member 30 are spaced apart along the second direction D2 and are provided on the first edge portion 231 , the body portion 31 of the support member 30 extends along the second direction D2 , because the extension direction of the main body part 31 is the same as the arrangement direction of the plurality of limiting parts 32, the structural stability of the support member 30 can be improved, and the supporting effect of the support member 30 can be improved. And depending on the assembly requirements, the support member 30 can be designed to extend along the first direction D1 or along the second direction D2, or be designed on the left and right sides or the upper and lower sides of the backlight module or display.

As shown in FIGS. 4 and 5 , the limiting portion 32 includes a groove 321 , and the groove 321 has two inclined surfaces. These two inclined surfaces are respectively against both sides of the edge 23 . The support member 30 is connected through the limiting portion 32 The grooves 321 correspondingly abut against both sides of the rib 23 and can be positioned in a direction perpendicular to the extending direction of the rib 23. For example, when the rib 23 extends along the second direction D2, the groove of the limiting portion 32 321 limits the position of the support member 30 along the first direction D1 to improve the positioning stability of the support member 30. When the slopes of the two slopes are different from the slopes of the corresponding sides of the edge 23, the two slopes are respectively in contact with the edge. The edge 23 is in line contact with each other. Preferably, the slopes of the two inclined surfaces are the same as the slopes of the side surfaces of the corresponding sides of the edge 23, so that the two inclined surfaces can fit both sides of the edge 23 respectively, thereby further improving the The positioning effect of the groove 321 and the two inclined surfaces abutting the edge 23 can disperse the stress on the edge 23, thereby ensuring the structural stability of the reflective sheet 20. Furthermore, the limiting portion 32 also includes two limiting feet 322. The two limiting feet 322 are respectively located on both sides of the edge portion 23 corresponding to the limiting portion 32. The groove 321 is formed between the two limiting feet 322. between.

In one aspect of the support member 30, the limiting portion 32 extends directly downward from the body portion 31, and the groove 321 is formed from the bottom of the limiting portion 32 toward the body portion 31. When the support member 30 has a plurality of When the limiting portion 32 is used, the groove 321 of each limiting portion 32 corresponds to each edge portion 23 respectively. As shown in FIG. 5 , in another aspect of the support member 30 , the two limiting legs 322 of the limiting portion 32 extend obliquely downward from the body portion 31 . When the supporting member 30 has multiple limiting portions 32 , the plurality of limiting parts 32 are arranged at intervals, and the adjacent limiting feet 322 are not connected to each other, and the limiting feet 322 do not need to abut the bottom of the reflective structure 21 , thereby reducing the material cost and weight of the supporting member 30 .

Furthermore, as shown in Figures 4, 5 and 7, the limiting part 32 also includes a limiting post 323. The limiting post 323 is disposed in the groove 321 and inserted into the edge 23. By the limiting post 323 and the edge, The holes of the portion 23 cooperate with each other to provide the support member 30 with a position limit along the first direction D1 and the second direction D2 at the same time. Preferably, the diameter of the limiting post 323 is equivalent to the diameter of the hole in the edge portion 23 , thereby further improving the positioning stability of the support member 30 . In addition, the limiting post 323 of the limiting part 32 is preferably located between the two slopes of the groove 321, so the hole of the edge part 23 is also opened at the top position between the two adjacent reflective structures 21, thereby This prevents the inclined side surfaces of the reflective structure 21 from being damaged, thereby preventing the optical quality from being affected. Moreover, since the combination position of the limiting post 323 and the groove 321 is in the middle of the groove 321, the central limiting effect of the support member 30 can be further increased. In addition, it should be noted that in the different forms of the limiting part 32 , whether the limiting part 32 only includes the groove 321 , or includes the groove 321 and also includes one of the limiting legs 322 or the limiting posts 323 . Or, it may include a groove 321, two limiting feet 322 and a limiting column 323 at the same time. The limiting part 32 all has a positioning effect. When the support member 30 includes multiple limiting parts 32, the multiple limiting parts 32 The portions 32 can each assume the different shapes mentioned above, and are connected to the plurality of limiting portions 32 through the body portion 31, so that the support member 30 is jointly limited by the plurality of limiting portions 32 to improve the positioning effect.

As shown in FIGS. 6 and 7 , the reflective sheet 20 has at least one side wall 24 adjacent to the outer frame 12 . The support member 30 abuts the side wall 24 and can be supported on the side edge of the diffusion plate 30 . The support member 30 is adjacent to the side wall 24, which can prevent the optical quality of the central part of the backlight module from being affected, and can provide the effect of positioning and supporting the support member 30 by abutting against the side wall 24, and the diffusion plate 30 The central part or the edges on other sides can be supported by other structural components, such as by the outer frame 12 . In addition, if the frame 10 includes multiple outer frames 12 respectively located on different side edges of the back panel 11 , the reflective sheet 20 can be formed with side walls 24 corresponding to the edges of the multiple outer frames 12 , and the backlight module can include The plurality of supporting members 30 respectively abut against the side walls 24 of different sides of the reflective sheet 20 .

As shown in FIGS. 6 and 7 , the backlight module defines a height direction D3. The outer frame 12 has at least one engaging portion 121. The engaging portion 121 abuts the support member 30 to limit the support member 30 along the height direction D3. It is located between the engaging portion 121 and the reflective sheet 20 . The support member 30 has at least one notch 33 , and the engaging portion 121 of the outer frame 12 extends into the notch 33 . Preferably, the top surface of the engaging portion 121 is flush with or slightly lower than the top surface of the body portion 31 of the support member 30, so that the top surface of the body portion 31 remains flat and can be fully used to support the diffuser plate 40. This improves the supporting effect, and can provide positioning effects in other directions through the cooperation of the contour shapes of the engaging portion 121 and the notch 33 . Furthermore, the outer frame 12 may have a plurality of engaging portions 121 , and the plurality of engaging portions 121 are arranged at intervals and abut against different positions of the support member 30 , thereby improving the limiting effect. In addition, the support member 30 can also be formed with a long slot 33, and the plurality of engaging portions 121 are accommodated in the slot 33, so as to reduce production costs and improve assembly convenience. Alternatively, the support member 30 does not form a long slot 33, but is formed with a plurality of slots 33 corresponding to the plurality of engaging portions 121, and each engaging portion 121 is correspondingly accommodated in the slot. groove 33 to further improve the positioning effect.

Preferably, the height direction D3 is perpendicular to the first direction D1 and the second direction D2 respectively, and the support member 30 can be limited along the first direction D1 and the second direction D2 by the limiting portion 32 , and in conjunction with the position of the outer frame 12 The engaging portion 121 limits the position of the support member 30 along the height direction D3, thereby limiting the position of the support member 30 in the three-dimensional directions, thereby lifting the support member 30 in the Z-axis direction (or the third direction, the height direction). positioning effect.

Please refer to Figure 8, which is a preferred embodiment of the display of the present invention, which includes a direct-type backlight module with a diffusion plate support function and a display panel 60. The display panel 60 is provided in the direct-type backlight module with a diffusion plate support function. superior.

In the direct-type backlight module with a diffuser plate support function of the present invention, because the diffuser plate 40 is carried by the support member 30, there is no need to provide an additional middle plastic frame to carry the diffuser plate 40 in the backlight module, and the support The component 30 is disposed on the reflective structure 21 of the reflective sheet 20 instead of between the reflective sheet 20 and the outer frame 12. Therefore, the reflective sheet 20 and the outer frame 12 can be disposed adjacent to each other, thereby bringing the light-emitting unit 50 closer to the backlight. The edge of the module is assembled above the reflective structure 21 of the reflective sheet 20 using the support 30 that allows light to pass through, so that the light emitted by the light-emitting unit 50 passes through the support 30 without being blocked. Therefore, the light emitted by the light-emitting unit 50 The light can be projected to the position of the backlight module closer to the edge of the diffuser plate 40, which can increase the light received by the edge of the display panel 60, thereby improving the light emission at the edge of the display, avoiding the occurrence of dark bands at the edge of the display, and thereby improving the light emission. Uniformity, and in line with the design trend of narrow borders, increasing the scope and taste of the visible area of the luminous surface. Therefore, the direct-type backlight module with a diffusion plate support function of the present invention can be designed accordingly to reduce the front edge according to the increasing demand for narrow frames in the market, so as to be suitable for all direct-type backlight module designs. What's more special is that it can comply with the narrow bezel design trend of direct-mounted models for vehicles. The display of the present invention can increase the light received by the edge of the display panel by applying a direct-type backlight module with a diffusion plate support function, thereby improving the light emission at the edge of the display, avoiding the occurrence of dark bands at the edge of the display, and thereby improving the uniformity of light emission. .

The above are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention. That is, any simple equivalent changes and modifications made according to the scope of claims and description of the present invention still fall within the scope of the present invention. Inventions covered by patents.

[List of reference signs]

10:Frame

11: Bottom plate

12:Outer frame

121: Engagement part

20: Reflective sheet

21: Reflective structure

22:cup-shaped space

23: Edge

231:First edge

232:Second edge

24:Side wall

30:Support

31: Ontology part

32: Limiting part

321: Groove

322:Limiting foot

323:Limiting column

33: missing slot

40: Diffusion plate

50:Light-emitting unit

60:Display panel

D1: first direction

D2: second direction

D3: Height direction

90: Direct type backlight module

91: Reflective sheet

92: Medium plastic frame

93: Diffusion plate

94:Light-emitting unit

95:Back panel

96:Outer frame

97: Dark band.

Claims

A direct-type backlight module with a diffusion plate support function, which includes:

A frame, which includes a base plate and at least one outer frame, the outer frame being provided on the edge of the base plate;

A reflective sheet, which is provided on the bottom plate and adjacent to the outer frame. The reflective sheet includes a plurality of reflective structures, and each of the reflective structures has a cup-shaped space;

At least one support member. The support member has a body part and at least one limiting part. The body part is located above the reflective structure of the reflective sheet. The limiting part extends downward from the body part. The reflective structure provided on the reflective sheet, the support member can allow light to pass through;

a diffusion plate provided on the body portion of the support member; and

A plurality of light-emitting units, each of which is disposed in a cup-shaped space of each reflective structure of the reflective sheet and is disposed toward the diffusion plate.
The direct-type backlight module with a diffusion plate support function according to claim 1, wherein the plurality of reflective structures are arranged in a matrix and are arranged along first and second directions that are not parallel to each other. There is at least a first edge between every two adjacent reflective structures arranged in the second direction, and there is at least a first edge between every two adjacent reflective structures arranged along the first direction. Two edge portions, the first edge portion is parallel to the first direction, the second edge portion is parallel to the second direction, and the limiting portion of the support member can be selectively provided on the third edge portion. on an edge or the second edge, so that the support member is positioned along at least one of the first direction and the second direction.
The direct-type backlight module with a diffusion plate support function according to claim 2, wherein the support member has a plurality of limiting portions. When the plurality of limiting portions of the supporting member are along the When the first direction is spaced apart and provided on the second edge portion, the body portion of the support member extends along the first direction, and when the plurality of limiting portions of the support member extend along the When arranged at intervals along the second direction and disposed on the first edge, the body portion of the support member extends along the second direction.
The direct-type backlight module with a diffusion plate support function according to claim 1, wherein there is an edge between each two adjacent reflective structures, and the limiting portion of the support member is provided on the edge. Ministry.
The direct-type backlight module with a diffusion plate support function according to claim 4, wherein the limiting portion includes a groove, the groove has two inclined surfaces, and the two inclined surfaces respectively abut against the both sides of the edge.
The direct-type backlight module with a diffusion plate support function according to claim 5, wherein the limiting part further includes two limiting feet, and the two limiting feet are respectively located corresponding to the limiting part. On both sides of the edge, the groove is formed between the two limiting feet.
The direct-type backlight module with a diffusion plate support function according to claim 5, wherein the limiting part further includes a limiting post, the limiting post is disposed in the groove and inserted into the edge part middle.
The direct backlight module with a diffusion plate support function according to claim 1, wherein the reflective sheet has at least one side wall, the side wall is adjacent to the outer frame, and the support member is against the side walls.
The direct-type backlight module with a diffusion plate support function according to any one of claims 1 to 8, wherein the direct-type backlight module with a diffusion plate support function defines a height direction, and the outer frame has At least one engaging portion abuts against the support member to limit the support member between the engaging portion and the reflective sheet along the height direction.
The direct-type backlight module with a diffusion plate support function according to claim 9, wherein the support member has at least one missing groove, and the engaging portion of the outer frame extends into the missing groove.
A display containing:

The direct-type backlight module with a diffusion plate support function according to any one of claims 1 to 10; and

A display panel is provided on the direct-type backlight module with a diffusion plate supporting function.