Backlight module and display device

Abstract

The invention discloses a backlight module and a display device. The backlight module comprises a fixed frame, a reflective plate, a light guide plate, and an optical film. The reflective plate, the light guide plate, and the optical film are connected in sequence from bottom to top. The fixed frame comprises an upper sealing plate, a side sealing plate, and a lower sealing plate. A heat dissipation cavity is formed between the reflective plate and the lower sealing plate. A mounting hole is provided on the side sealing plate. A light bar is provided in the mounting hole. An LED lamp is provided on the inner side of the light bar. A heat dissipation sealing block connected to the lower sealing plate is provided below the LED lamp. A vent hole communicating with the heat dissipation cavity is provided on the heat dissipation sealing block. An air inlet hole corresponding to the position of the vent hole is provided on the side sealing plate. One end of the reflective plate is connected to the heat dissipation sealing block. The upper end of the light guide plate is connected to the lower end surface of the sixth sealing block. One end of the optical film is connected to one end of the sixth sealing block. A display device comprises a housing, a liquid crystal panel, and a backlight module.

Description

Technical Field

[0001] The invention relates to a backlight module and a display device. Background Art

[0002] The backlight module is one of the key components of the LCD panel. The LCD is a passive light-emitting element. The display screen itself does not emit light, but is illuminated by the backlight system below it. The backlight source and the LCD screen together constitute the LCD module.

[0003] With the development of society, the thickness of liquid crystal displays is getting thinner and thinner, which will lead to the lack of sufficient heat dissipation space in the backlight module, so that a large amount of heat will accumulate in the internal cavity of the backlight module, which will cause certain harm to the components of the module. If the heat cannot be dissipated for a long time, it will affect the stability and service life of the components, thereby reducing the display effect of the display device. Summary of the invention

[0004] In view of this, the present invention provides a backlight module and a display device.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A backlight module comprises a fixed frame, a reflective plate, a light guide plate, and an optical film, wherein the reflective plate, the light guide plate, and the optical film are sequentially connected from bottom to top, the fixed frame comprises an upper sealing plate, a side sealing plate, and a lower sealing plate, the upper sealing plate and the lower sealing plate are arranged in parallel, the ends of the upper sealing plate and the lower sealing plate are connected through the side sealing plate, a buffer ball is arranged on the lower sealing plate, the reflective plate is arranged on the upper end of the buffer ball, a heat dissipation cavity is formed between the reflective plate and the lower sealing plate, a mounting hole is arranged on the side sealing plate, a light bar is arranged in the mounting hole, an LED lamp is arranged on the inner side of the light bar, and the LED A sixth sealing block connected to the upper sealing plate is provided above the D lamp, a heat dissipation sealing block connected to the lower sealing plate is provided below the LED lamp, an air vent connected to the heat dissipation cavity is provided on the heat dissipation sealing block, an air inlet corresponding to the position of the air vent is provided on the side sealing plate, one end of the reflective plate is connected to the heat dissipation sealing block, the upper end of the light guide plate is connected to the lower end surface of the sixth sealing block, one end of the optical film is connected to one end of the sixth sealing block, a light chamber is surrounded by the sixth sealing block, the side sealing plate, the heat dissipation sealing block and the light guide plate, and the LED lamp is arranged in the light chamber.

[0007] According to an embodiment of the present invention, a baffle is provided at the end of the upper sealing plate, and a second sealing block is provided between the baffle and the optical film.

[0008] According to an embodiment of the present invention, a sealing strip is provided between the light strip and the inner wall of the mounting hole.

[0009] According to an embodiment of the present invention, a fixing ring is provided on the upper end surface of the lower sealing plate, and the buffer ball is a hemispherical structure, and the buffer ball is arranged in the fixing ring.

[0010] A display device comprises a shell, a liquid crystal panel and a backlight module, wherein the shell comprises a pressing plate and a side plate, wherein the pressing plate is vertically connected to the side plate, wherein the side plate is provided with a heat dissipation hole, wherein a filter is provided on the inner side of the heat dissipation hole, wherein a support bar is provided above the heat dissipation hole, wherein the support bar is connected to the side plate through a connecting bar, wherein a third sealing block and a fourth sealing block are provided between the side sealing plate and the side plate, wherein a heat exchange cavity is provided between the third sealing block and the fourth sealing block, wherein the heat dissipation hole, the mounting hole and the air inlet hole are all connected to the heat exchange cavity, and wherein the liquid crystal panel is provided between the pressing plate and the upper sealing plate.

[0011] According to an embodiment of the present invention, a mounting groove is provided on the upper end surface of the upper sealing plate, a first sealing block is provided in the mounting groove, and an upper end of the first sealing block is connected to a lower end of the liquid crystal panel.

[0012] According to an embodiment of the present invention, a sealing plate is provided between the pressing plate and the liquid crystal panel.

[0013] According to one embodiment of the present invention, a limiting strip is provided at the lower end of the pressing plate, a second sealing block is provided at the upper end of the supporting strip, one side of the second sealing block is connected to the limiting strip, and one end of the liquid crystal panel is connected to the second sealing block.

[0014] According to an embodiment of the present invention, the edge of the filter screen is connected to the side plate via a pressure strip.

[0015] According to one embodiment of the present invention, a supporting plate is provided at the lower end of the side plate, and the fourth sealing block is provided at the upper end of the supporting plate.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

[0017] 1. The backlight module of the present invention is provided with a heat dissipation cavity between the reflective plate and the lower sealing plate, the heat dissipation sealing block is provided with an air vent connected to the heat dissipation cavity, and the side sealing plate is provided with an air inlet hole corresponding to the position of the air vent, thereby realizing air circulation inside the backlight module, improving the heat dissipation effect, and solving the problem of the current backlight module having a shortened life due to poor heat dissipation effect. The good heat dissipation effect ensures the quality of the components in the use of the backlight module.

[0018] 2. The present invention arranges a buffer ball between the reflective plate and the lower sealing plate, which not only plays a supporting role, but also has a buffering and shock-absorbing effect, thereby improving the impact resistance of the product.

[0019] 3. The fixing frame and the backlight module of the present invention are connected via a sealing block, which not only ensures good sealing to prevent dust from entering, but also satisfies the thermal expansion and contraction performance of the product during use to prevent deformation.

[0020] 4. A heat exchange cavity is provided between the housing and the optical module of the present invention, and the two are connected by a sealing block, which not only has a buffering and shock absorbing effect, but also has a good heat dissipation effect, thereby ensuring the display effect of the product and improving the service life.

[0021] 5. The present invention arranges a filter screen inside the heat dissipation hole to filter impurities in the air, thereby ensuring the hygiene inside the display device and preventing the problem of poor heat dissipation and high power consumption caused by dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 is a schematic diagram of the structure of the shell;

[0025] Figure 3 It is a structural diagram of a fixed frame.

[0026] Reference numerals:

[0027] 1-housing; 101-pressing plate; 102-limiting strip; 103-connecting strip; 104-supporting strip; 105-side panel; 106-heat dissipation hole; 107-supporting plate; 108-pressing strip; 109-filter; 2-LCD panel; 3-fixing frame; 301-baffle; 302-installation slot; 303-upper sealing plate; 304-side sealing plate; 305-sealing strip; 306-installation hole; 307-air inlet hole; 308-fixing Ring; 309-buffer ball; 310-lower sealing plate; 4-light bar; 5-LED lamp; 6-heat dissipation sealing block; 601-vent; 7-reflection plate; 8-light guide plate; 9-optical film; 10-sealing plate; 11-first sealing block; 12-second sealing block; 13-third sealing block; 14-fourth sealing block; 15-fifth sealing block; 16-sixth sealing block; 17-light chamber; 18-heat dissipation cavity; 19-heat exchange cavity. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1,

[0032] Reference below Figure 1-3A backlight module includes a fixed frame 3, a reflective plate 7, a light guide plate 8, and an optical film 9. The reflective plate 7, the light guide plate 8, and the optical film 9 are connected in sequence from bottom to top. The fixed frame 3 includes an upper sealing plate 303, a side sealing plate 304, and a lower sealing plate 310. The upper sealing plate 303 is arranged in parallel with the lower sealing plate 310. The ends of the upper sealing plate 303 and the lower sealing plate 310 are connected through the side sealing plate 304. A buffer ball 309 is arranged on the lower sealing plate 310. The reflective plate 7 is arranged at the upper end of the buffer ball 309. A heat dissipation cavity 18 is formed between the reflective plate 8 and the lower sealing plate 310. A mounting hole 306 is arranged on the side sealing plate 304. A light bar 4 is arranged in the mounting hole 306. The inner side of the light bar 4 is provided with an LED The LED lamp 5 is provided with a sixth sealing block 16 connected to the upper sealing plate 303 above the LED lamp 5, a heat dissipation sealing block 6 connected to the lower sealing plate 310 is provided below the LED lamp 5, the heat dissipation sealing block 6 is provided with an air vent 601 connected to the heat dissipation cavity 18, the side sealing plate 304 is provided with an air inlet 307 corresponding to the position of the air vent 601, one end of the reflective plate 7 is connected to the heat dissipation sealing block 6, the upper end of the light guide plate 8 is connected to the lower end surface of the sixth sealing block 16, one end of the optical film 9 is connected to one end of the sixth sealing block 16, and a light chamber 17 is surrounded by the sixth sealing block 16, the side sealing plate 304, the heat dissipation sealing block 6, and the light guide plate 8, and the LED lamp 5 is arranged in the light chamber 17.

[0033] The backlight module of the present invention is provided with a heat dissipation cavity between the reflective plate and the lower sealing plate, the heat dissipation sealing block is provided with an air vent connected to the heat dissipation cavity, and the side sealing plate is provided with an air inlet hole corresponding to the position of the air vent, thereby realizing air circulation inside the backlight module, improving the heat dissipation effect, and solving the problem of shortened life of the current backlight module due to poor heat dissipation effect. The good heat dissipation effect ensures the quality of the components in use of the backlight module.

[0034] In order to improve the sealing and shock absorption effect, a baffle 301 is provided at the end of the upper sealing plate 303 , and a second sealing block 15 is provided between the baffle 301 and the optical film 9 .

[0035] Specifically, a sealing strip 305 is provided between the light strip 4 and the inner wall of the mounting hole 306 .

[0036] In order to improve the impact resistance of the product, a fixing ring 308 is provided on the upper end surface of the lower sealing plate 310. The buffer ball 309 is a hemispherical structure. The buffer ball 309 is arranged in the fixing ring 308, which not only plays a supporting role but also has a buffering and shock-absorbing effect.

[0037] like Figure 1-3As shown, a display device includes a housing 1 and a liquid crystal panel 2. The housing 1 includes a pressing plate 101 and a side plate 105. The pressing plate 101 is vertically connected to the side plate 105. A heat dissipation hole 106 is provided on the side plate 105. A filter screen 109 is provided on the inner side of the heat dissipation hole 106. A support bar 104 is provided above the heat dissipation hole 106. The support bar 104 is connected to the side plate 105 through a connecting bar 103. A third sealing block 13 and a fourth sealing block 14 are provided between the side sealing plate 304 and the side plate 105. A heat exchange cavity 19 is provided between the third sealing block 13 and the fourth sealing block 14. The heat dissipation hole 106, the mounting hole 306, and the air inlet hole 307 are all connected to the heat exchange cavity 19. The liquid crystal panel 2 is provided between the pressing plate 101 and the upper sealing plate 303.

[0038] In order to fix the first sealing block and prevent it from sliding, a mounting groove 302 is provided on the upper end surface of the upper sealing plate 303 . The first sealing block 11 is provided in the mounting groove 302 . The upper end of the first sealing block 11 is connected to the lower end of the liquid crystal panel 2 .

[0039] In order to improve the sealing performance and protect the liquid crystal panel, a sealing plate 10 is provided between the pressing plate 101 and the liquid crystal panel 2 .

[0040] In order to fix and limit the end of the liquid crystal panel, a limiting strip 102 is provided at the lower end of the pressure plate 101, and a second sealing block 12 is provided at the upper end of the support strip 104. One side of the second sealing block 12 is connected to the limiting strip 102, and one end of the liquid crystal panel 2 is connected to the second sealing block 12.

[0041] Specifically, the edge of the filter screen 109 is connected to the side plate 105 via the pressure strip 108 .

[0042] In order to improve the aesthetics and product quality, a support plate 107 is provided at the lower end of the side plate 105 , and the fourth sealing block 14 is provided at the upper end of the support plate 107 .

[0043] Specifically, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0044] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A backlight module, comprising a fixed frame (3), a reflective plate (7), a light guide plate (8), and an optical film (9), wherein the reflective plate (7), the light guide plate (8), and the optical film (9) are connected in sequence from bottom to top, characterized in that: The fixing frame (3) comprises an upper sealing plate (303), a side sealing plate (304), and a lower sealing plate (310); the upper sealing plate (303) and the lower sealing plate (310) are arranged in parallel; the ends of the upper sealing plate (303) and the lower sealing plate (310) are connected via the side sealing plate (304); a buffer ball (309) is provided on the lower sealing plate (310); the reflector (7) is arranged at the upper end of the buffer ball (309); a heat dissipation cavity (18) is formed between the reflector (8) and the lower sealing plate (310); a mounting hole (306) is provided on the side sealing plate (304); a light bar (4) is provided in the mounting hole (306); an LED light (5) is provided on the inner side of the light bar (4); a sixth projection (304) connected to the upper sealing plate (303) is provided above the LED light (5); A sealing block (16), a heat dissipation sealing block (6) connected to a lower sealing plate (310) is provided below the LED lamp (5), the heat dissipation sealing block (6) is provided with an air vent (601) communicating with the heat dissipation cavity (18), the side sealing plate (304) is provided with an air inlet hole (307) corresponding to the position of the air vent (601), one end of the reflective plate (7) is connected to the heat dissipation sealing block (6), the upper end of the light guide plate (8) is connected to the lower end surface of the sixth sealing block (16), one end of the optical film (9) is connected to one end of the sixth sealing block (16), and a light chamber (17) is formed by the sixth sealing block (16), the side sealing plate (304), the heat dissipation sealing block (6), and the light guide plate (8), and the LED lamp (5) is arranged in the light chamber (17).

2. The backlight module according to claim 1, characterized in that: A baffle (301) is provided at the end of the upper sealing plate (303), and a second sealing block (15) is provided between the baffle (301) and the optical film (9).

3. The backlight module according to claim 1, characterized in that: A sealing strip (305) is provided between the light strip (4) and the inner wall of the mounting hole (306).

4. The backlight module according to claim 2, characterized in that: The upper end surface of the lower sealing plate (310) is provided with a fixing ring (308), and the buffer ball (309) is a hemispherical structure, and the buffer ball (309) is arranged inside the fixing ring (308).

5. A display device, characterized in that: The invention comprises a housing (1), a liquid crystal panel (2), and a backlight module according to any one of claims 1 to 4, wherein the housing (1) comprises a pressure plate (101) and a side plate (105), wherein the pressure plate (101) is vertically connected to the side plate (105), a heat dissipation hole (106) is provided on the side plate (105), a filter screen (109) is provided on the inner side of the heat dissipation hole (106), a support bar (104) is provided above the heat dissipation hole (106), and the support bar (104) is provided through The connecting strip (103) is connected to the side plate (105); a third sealing block (13) and a fourth sealing block (14) are provided between the side sealing plate (304) and the side plate (105); a heat exchange cavity (19) is provided between the third sealing block (13) and the fourth sealing block (14); the heat dissipation holes (106), the mounting holes (306), and the air inlet holes (307) are all in communication with the heat exchange cavity (19); and the liquid crystal panel (2) is provided between the pressing plate (101) and the upper sealing plate (303).

6. The display device according to claim 5, characterized in that: The upper end surface of the upper sealing plate (303) is provided with a mounting groove (302), a first sealing block (11) is provided in the mounting groove (302), and the upper end of the first sealing block (11) is connected to the lower end of the liquid crystal panel (2).

7. The display device according to claim 6, characterized in that: A sealing plate (10) is provided between the pressing plate (101) and the liquid crystal panel (2).

8. The display device according to claim 7, characterized in that: A limit strip (102) is provided at the lower end of the pressing plate (101), a second sealing block (12) is provided at the upper end of the supporting strip (104), one side of the second sealing block (12) is connected to the limit strip (102), and one end of the liquid crystal panel (2) is connected to the second sealing block (12).

9. The display device according to claim 8, characterized in that: The edge of the filter screen (109) is connected to the side plate (105) via a pressure strip (108).

10. The display device according to claim 9, characterized in that: A support plate (107) is provided at the lower end of the side plate (105), and the fourth sealing block (14) is provided at the upper end of the support plate (107).

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