CN202082738U - Adjustable thickness backlight module - Google Patents

Abstract

The backlight module (20) with adjustable thickness comprises a diffusion plate (25), a back plate unit (28), a plurality of light sources (26) and a brightness enhancement film (24); the back plate unit is arranged on one side face of the diffusion plate and comprises a bottom plate portion (281), a side edge portion (282) and at least one screw (283), wherein the bottom plate portion comprises at least one first hole (2811), the side edge portion comprises at least one second hole (2821), the first hole and the second hole are mutually corresponding and adjacent, and the screw can penetrate through the first hole and the second hole to be locked. Therefore, the backlight module can adjust the thickness through the first hole and the second hole, and can be suitable for display structures with any thickness.

Description

Adjustable thickness backlight module

technical field

The utility model relates to a display structure, in particular to a backlight module whose thickness can be adjusted.

Background technique

In recent years, traditional cathode ray tube displays (commonly known as CRT displays) have been gradually replaced by liquid crystal displays. The main reason is that the amount of radiation emitted by liquid crystal displays is much smaller than that of CRT displays. In addition, the manufacturing cost of liquid crystal displays has decreased in recent years. There is a significant reduction, which is why LCD monitors are gradually becoming the mainstream of the TV or computer screen market.

Please refer to FIG. 1 and FIG. 2 at the same time. FIG. 1 is a perspective view of a conventional display structure and a backlight module, and FIG. 2 is a side view of a conventional display structure and a backlight module. As shown in FIGS. 1 and 2 , the display structure 1 includes a front frame 11 , a liquid crystal panel 12 and a backlight module 10 . The backlight module 10 is a direct type backlight module, which includes a brightness enhancement film 14, a diffusion plate 15, a plurality of light sources 16, a reflector 17 and a back panel unit 18, and the brightness enhancement film 14, the diffusion plate 15, multiple A light source 16, a reflector 17 and a back panel unit 18 are arranged in order from top to bottom. The display structure 1 can provide a light source through the backlight module 10 , and project light energy to the liquid crystal panel 12 , so that people can see the image changes on the liquid crystal panel 12 .

However, with the advancement of technology, people have higher and higher requirements on the performance of the display structure 1 and the backlight module 10 , and at the same time, they hope that the thickness of the display structure 1 and the backlight module 10 will be thinner and thinner. As shown in the figure, the front frame 11 , the liquid crystal panel 12 , and the backlight module 10 have fixed thicknesses, and thus the thickness of the display structure 1 formed therefrom is also fixed and not easily changed. Therefore, in order to make the product thinner, the manufacturing factory of the backlight module 10 or the flat panel display has to constantly re-open the mold and remanufacture the structure of the backlight template to reduce its thickness, which wastes cost.

Contents of the invention

The main purpose of the utility model is to develop a backlight module applicable to various thicknesses, so that the backlight module can be applied to display structures of any thickness under the premise that the display structure becomes thinner gradually.

In order to achieve the above object, the utility model provides an adjustable thickness backlight module, the backlight module includes a diffusion plate, a back plate unit, a plurality of light sources and a brightness enhancement film; wherein, the diffusion plate includes a light emitting surface and a light-incident surface, the light-exit surface and the light-incident surface are respectively located on opposite sides of the diffusion plate; part and at least one screw, the bottom part includes at least one first hole, and the side part includes at least one second hole, the first hole and the second hole are adjacent to each other, and the screw can pass through The first hole is locked with the second hole; these light sources are arranged between the diffusion plate and the back plate unit, so that the back plate unit accommodates these light sources; the brightness enhancement film is parallel to the light emitting surface and arranged on the The side of the light-emitting surface; thereby, the thickness of the backlight module can be adjusted through the first hole and the second hole.

In an exemplary embodiment of the adjustable thickness backlight module, each light source is parallel to the light incident surface.

In an exemplary embodiment of the thickness-adjustable backlight module, a plurality of light sources are arranged at equal intervals.

In an exemplary embodiment of the thickness-adjustable backlight module, the plurality of light sources are parallel to each other.

In an exemplary embodiment of the adjustable thickness backlight module, the backlight module further includes a reflection sheet, and the reflection is arranged between the light source and the back panel unit.

In an exemplary embodiment of the adjustable thickness backlight module, the reflective sheet is parallel to the bottom plate.

In order to achieve the above object, the utility model provides another backlight module with adjustable thickness, which includes a light guide plate, a back plate unit, at least one light source, a brightness enhancement film and a diffusion film; wherein, the light guide The light plate includes a light exit surface, a reflective surface and at least one light incident surface, the light exit surface and the reflective surface are respectively located on two corresponding sides of the light guide plate, and the light incident surface is located on the side of the light guide plate; the back panel unit is arranged on Outside the reflective surface of the light guide plate, the back panel unit includes a bottom plate, a side edge and at least one screw, the bottom plate includes at least one first hole, and the side edge includes at least one second hole , the first hole and the second hole correspond to each other and are adjacent to each other, and the screw can pass through the first hole and the second hole to lock; the light source is arranged on the light incident surface side of the light guide plate; the brightness enhancement film is arranged On the light emitting surface side of the light guide plate; the diffusion film is arranged between the brightness enhancement film and the light guide plate; thereby, the thickness of the backlight module can be adjusted through the first hole and the second hole.

In an exemplary embodiment of the adjustable thickness backlight module, each light source is parallel to the light incident surface.

In an exemplary embodiment of the adjustable thickness backlight module, the backlight module further includes a reflective sheet, and the reflective sheet is disposed between the light guide plate and the backplane unit.

In an exemplary embodiment of the adjustable thickness backlight module, the reflective sheet is parallel to the bottom plate.

In this way, the thickness-adjustable backlight module of the present invention has a bottom plate and a side portion that can change the joint position, so the joint position can be changed according to the needs, so as to change the thickness of the backlight module and the display structure used ; Therefore, it can adapt to the trend of thinning, can save cost, and is very convenient.

In order to make those familiar with the art understand the purpose, characteristics and effects of the present utility model, the utility model is described in detail as follows by the following specific embodiments and accompanying drawings.

Description of drawings

FIG. 1 is a perspective view of a conventional display structure and a backlight module.

FIG. 2 is a schematic side view of a conventional display structure and a backlight module.

3 is a schematic side view of the structure of the backlight module and the display in the first embodiment of the present invention.

FIG. 4 is a schematic side view of the structure of the backlight module and the display in the second embodiment of the present invention.

FIG. 5 is a schematic side view of a backlight module and a display structure according to a third embodiment of the present invention.

FIG. 6 is a schematic side view of the structure of the backlight module and the display in the fourth embodiment of the present invention.

Label description:

1, 2, 3, 4, 5: Display structure

10, 20, 30, 40, 50: backlight module

11, 21, 31, 41, 51: front frame

12, 22, 32, 42, 52: LCD panel

14, 24, 34, 44, 54: brightness enhancement film

15, 25, 35, 45: Diffusion plate

55: light guide plate

25A, 55A: incident surface

25B, 55B: Light-emitting surface

55C: reflective surface

16, 26, 36, 46, 56: light source

17, 27, 37, 47, 57: reflector

18, 28, 38, 48, 58: Backplane unit

281, 381, 481, 581: bottom plate

2811, 3811, 4811, 5811: the first hole

282, 382, 482, 582: side parts

2821, 3821, 4821, 5821: the second hole

283, 383, 483, 583: Screws

53: Diffusion film

59: lampshade.

Detailed ways

Please refer to Fig. 3, Fig. 3 is the side schematic view of the backlight module and the display structure of the first embodiment of the utility model, as shown in Fig. 21 assembled into a display structure 2. The backlight module 20 includes a diffusion plate 25 , a back plate unit 28 , a plurality of light sources 26 , a brightness enhancement film 24 and a reflection sheet 27 . The diffusion plate 25 includes a light-emitting surface 25B and a light-incident surface 25A. The light-emitting surface 25B is located on the top of the diffusion plate 25, and the light-incidence surface 25A is located below the diffusion plate 25. opposite sides of . The back plate unit 28 is arranged on the light incident surface 25A side of the diffuser plate 25, that is, below the diffuser plate 25; the back plate unit 28 includes a bottom plate portion 281, a side portion 282 and two screws 283, as enlarged in FIG. 3 As shown in the figure, the bottom plate part 281 includes three first holes 2811, and the side part 282 includes a second hole 2821, and the second hole 2821 can correspond to any one of the first holes 2811 and be adjacent to each other; the screw 283 Through the corresponding first hole 2811 and the second hole 2821 , the side portion 282 and the bottom plate portion 281 can be locked and fixed, so that the back plate unit 28 becomes a firm structure.

A plurality of light sources 26 are arranged between the diffuser plate 25 and the back plate unit 28 , so the back plate unit 28 can accommodate the light sources 26 . In addition, each light source 26 is parallel to the light incident surface 25A, and the plurality of light sources 26 are arranged at equal intervals, and two pairs of the plurality of light sources 26 are arranged parallel to each other. The brightness enhancement film 24 is parallel to the light-emitting surface 25B and arranged on the side of the light-emitting surface 25B. The reflective sheet 27 is disposed between the light sources 26 and the back panel unit 28 , and the reflective sheet 27 is parallel to the bottom plate portion 281 . That is to say, the components of the backlight module 20 from top to bottom are a brightness enhancement film 24 , a diffusion plate 25 , a plurality of light sources 26 , a reflection sheet 27 and a back panel unit 28 . In this embodiment, the light source 26 is a cold cathode fluorescent lamp (Cold cathode fluorescent lamps, CCFL), but in other embodiments, the light source 26 may also be a light emitting diode (Light emitting diode, LED) light bar.

In addition, in the back panel unit 28 , the combined position of the side portion 282 and the bottom plate portion 281 can be adjusted appropriately, so that the second holes 2821 correspond to different first holes 2811 and lock together. Because the three first holes 2811 are located at different positions in the vertical direction, when the second holes 2821 correspond to different first holes 2811, the thickness of the backplane unit 28 is not the same, and the overall thickness of the backplane unit 28 can be changed. , can be applied to any period, any thickness of the display structure 2. That is, the thickness of the backlight module 20 can be adjusted through the matching of the first hole 2811 and the second hole 2821 without re-opening the mold to produce a thinner structure. It can be used in any configuration, which is convenient and practical.

The utility model also has other embodiments. Please refer to FIG. 4 . FIG. 4 is a schematic side view of the structure of the backlight module and the display in the second embodiment of the present invention. As shown in Figure 4, the display structure 3 includes a front frame 31, a liquid crystal panel 32 and a backlight module 30, and the backlight module 30 includes a diffusion plate 35, a back panel unit 38, a plurality of light sources 36, a brightness enhancement film 34 and A reflector 37. The back plate unit 38 includes a bottom plate portion 381, a side edge portion 382 and two screws 383. As shown in the enlarged view of FIG. Each second hole 3821, the first hole 3811 and any one of the second holes 3821 can correspond to each other and be adjacent to each other. The first holes 3811 can be locked corresponding to different second holes 3821 respectively. Because the three second holes 3821 are located at different positions in the vertical direction, when the first holes 3811 correspond to different second holes 3821 , the thicknesses of the back plate unit 38 are all different.

Please refer to FIG. 5 . FIG. 5 is a schematic side view of the structure of the backlight module and the display according to the third embodiment of the present invention. As shown in the enlarged view of FIG. 5 , the display structure 4 includes a front frame 41, a liquid crystal panel 42 and a backlight module 40, and the backlight module 40 includes a diffusion plate 45, a back panel unit 48, a plurality of light sources 46, an amplifier Bright film 44 and a reflector 47. The back plate unit 48 includes a bottom plate portion 481, a side portion 482 and six screws 483. As shown in FIG. 8, the bottom plate portion 481 includes three first holes 4811, and the side portion 482 also includes three first holes For the two holes 4821, any one of the first holes 4811 can correspond to any one of the second holes 4821 and be adjacent to each other. Here, if the three first holes 4811 correspond to the three second holes 4821 respectively, and the six screws 483 are locked and fixed at the same time, the mechanical strength of the backboard unit 48 is better.

Of course, the present invention can also be applied to side-type backlight modules. Please refer to FIG. 6 . FIG. 6 is a schematic side view showing the structure of the backlight module and the display according to the fourth embodiment of the present invention. As shown in Figure 6, the display structure 5 includes a front frame 51, a liquid crystal panel 52, and a backlight module 50, and the backlight module 50 includes a brightness enhancement film 54, a diffusion film 53, a light guide plate 55, a reflective sheet 57, a backlight module 50, and a backlight module 50. The board unit 58 , two light sources 56 and two lampshades 59 . The light guide plate 55 includes a light exit surface 55B, a reflective surface 55C and two light incident surfaces 55A, the light exit surface 55B is located above the light guide plate 55, and the reflective surface 55C is located below the light guide plate 55, so the light exit surface 55B and the reflective surface 55C The two light incident surfaces 55A are respectively located on the left and right sides of the light guide plate 55 . The back plate unit 58 is disposed outside the reflective surface 55C of the light guide plate 55 , and the back plate unit 58 includes a bottom plate portion 581 , a side portion 582 and six screws 583 . As shown in FIG. 10 , the bottom plate portion 581 includes three first holes 5811, and the side portion 582 includes three second holes 5821, and the three first holes 5811 correspond to and are adjacent to the three second holes 5821 respectively. Therefore, the bottom plate portion 581 and the side portion 582 can be fixedly locked by passing through the first hole 5811 and the second hole 5821 through the screw 583 . The two light sources 56 are respectively disposed on two light incident surfaces 55A sides of the light guide plate 55 , and each light source 56 is parallel to the light incident surface 55A. Two lampshades 59 are respectively arranged around the two light sources 56 for reflecting and guiding the light emitted by the light sources 56 to project the light into the light guide plate 55 . The brightness enhancement film 54 is disposed on the light emitting surface 55B side of the light guide plate 55 , and the diffusion film 53 is disposed between the brightness enhancement film 54 and the light guide plate 55 . The reflective sheet 57 is disposed between the light guide plate 55 and the backplane unit 58 and is parallel to the bottom plate portion 581 . Thus, the thickness of the side-type backlight module 50 can also be adjusted.

In summary, the thickness-adjustable backlight module of the present invention has a bottom plate and a side portion that can change the joint position, so the joint position can be changed according to the needs, so as to change the structure of the backlight module and the display used by it. thickness of. Therefore, when the thin structure brought about by the development of science and technology is widely popular, the backlight module of the present invention can be applied without re-opening the mold or discarding the old structure, which is very convenient and can save costs.

Although the utility model has been disclosed above with specific embodiments, the disclosed specific embodiments are not intended to limit the utility model. The change and retouching of species, the change and retouching all belong to the category of the present utility model.

Claims (10)

1. Adjustable thickness backlight module (20, 30, 40), characterized in that the backlight module includes: A diffuser plate (25, 35, 45), the diffuser plate (25, 35, 45) includes a light exit surface (25B) and a light incident surface (25A), the light exit surface (25B) and the light incident surface (25A ) are respectively located on opposite sides of the diffusion plate (25, 35, 45); A backplane unit (28, 38, 48), the backplane unit (28, 38, 48) is arranged on the light incident surface side (25A) of the diffusion plate (25, 35, 45), the backplane unit (28 , 38, 48) includes a bottom plate portion (281,381,481), a side edge portion (282,382,482) and at least one screw (283,383,483), the bottom plate portion (281,381,481) At least one first hole (2811, 3811, 4811) is included on the top, at least one second hole (2821, 3821, 4821) is included on the side portion, the first hole and the second hole correspond to each other and are adjacent , the screw can be locked through the first hole and the second hole; a plurality of light sources (26, 36, 46), the light sources (26, 36, 46) are arranged between the diffusion plate (25, 35, 45) and the back plate unit (28, 38, 48), having the back panel unit (28, 38, 48) accommodate the light sources (26, 36, 46); A brightness enhancing film (24, 34, 44), the brightness enhancing film (24, 34, 44) is parallel to the light emitting surface (25B) and arranged on the side of the light emitting surface (25B). 2. The thickness-adjustable backlight module (20, 30, 40) according to claim 1, wherein each light source (26, 36, 46) is parallel to the light incident surface (25A). 3. The thickness-adjustable backlight module (20, 30, 40) according to claim 1, wherein a plurality of light sources (26, 36, 46) are arranged at equal intervals. 4. The thickness-adjustable backlight module (20, 30, 40) according to claim 1, wherein the plurality of light sources (26, 36, 46) are parallel to each other. 5. The adjustable thickness backlight module (20, 30, 40) as claimed in claim 1, wherein, the backlight module (20, 30, 40) also includes a reflector (27, 37, 47), the reflector The sheets (27, 37, 47) are arranged between the light sources (26, 36, 46) and the back panel unit (28, 38, 48). 6. The thickness-adjustable backlight module (20, 30, 40) according to claim 5, wherein the reflection sheet (27, 37, 47) is parallel to the bottom plate portion (281, 381, 481). 7. The thickness-adjustable backlight module (50), characterized in that the backlight module (50) includes: A light guide plate (55), the light guide plate (55) includes a light exit surface (55B), a reflective surface (55C) and at least one light incident surface (55A), the light exit surface (55B) and the reflective surface (55C) respectively Located on two corresponding sides of the light guide plate (55), the light incident surface (55A) is located on a side of the light guide plate (55); A backplane unit (58), the backplane unit (58) is arranged outside the reflective surface (55C) of the light guide plate (55), the backplane unit (58) includes a bottom plate part (581), a side part (582) and at least one screw (583), the bottom plate portion (581) includes at least one first hole (5811), the side portion includes at least one second hole (5821), the first hole ( 5811) is corresponding to and adjacent to the second hole (5821), and the screw (583) can pass through the first hole (5811) and the second hole (5821) to lock; At least one light source (56), the light source (56) is arranged on the light incident surface (55A) side of the light guide plate (55); A brightness enhancement film (54), the brightness enhancement film (54) is arranged on the light emitting surface (55B) side of the light guide plate (55); A diffusion film (53), the diffusion film (53) is arranged between the brightness enhancement film (54) and the light guide plate (55). 8. The thickness-adjustable backlight module (50) according to claim 7, wherein each light source (56) is parallel to the light incident surface (55A). 9. The adjustable thickness backlight module (50) according to claim 7, wherein the backlight module (50) further comprises a reflective sheet (57), and the reflective sheet (57) is arranged on the light guide plate (55) and the backplane unit (58). 10. The thickness-adjustable backlight module (50) according to claim 9, wherein the reflective sheet (57) is parallel to the bottom plate portion (581).

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