KR200399726Y1 - Backlight module - Google Patents

Abstract

In the backlight module of the present invention, a reflection light cover, a plurality of light sources, a diffusion plate, a plurality of optical sheets, and an LCD plate are sequentially installed from the inside to the outside thereof, and the diffusion plate includes a plurality of light guide polygon cones on the entrance and exit surfaces. And the light rays of the light source pass through the light guide polygonal cone of the diffusion plate, and the passing light beam passes through the light guide polygonal cone at least twice so that the light beam of the light source is more effectively distributed.

Description

Light guide structure of direct backlight module {BACKLIGHT MODULE}

The present invention relates to a light guide structure of a backlight module, and more particularly, to the provision of a direct backlight module light guide structure.

Generally applied to LCDs of information devices, a direct or metered backlight module support structure is selectively used based on actual design requirements. As shown in FIG. 1, a schematic diagram of a basic structure of a direct backlight module support structure includes a reflection light cover 10, a plurality of light sources 20, a diffusion plate 30, and a plurality of elements. The optical sheet 40 and the LCD plate 50 are installed in sequence. Each light source 20 is provided between the reflected light cover 10 and the diffuser plate 30 at a predetermined interval in a line or a U-shaped or other continuously curved lamps side by side. For the convenience of the market, the optical sheets 40 between the diffusion plate 30 and the LCD plate 50 include one to three diffusion pieces, zero to two dimming pieces, zero to one reflective polarizing pieces, and the like. It is composed of a combination, the action is that the light passing through forms a diffusing action, and what is desired to improve is that no light is produced in the gap between each light source 20, the light and dark zone phenomenon is formed on the LCD module.

In addition, the action of the diffuser plate 30 is to uniformly disperse the passing light beam, to improve the effect of the finite contrast zone phenomenon of the LCD module, so that the backlight module of the light source 20 and the diffuser plate 30 By making the interval as long as possible, each light source 20 enters and expands the range of the diffusion plate 30, thereby reaching the purpose of reducing the dark area. However, the structural design as described above is quite limited in effect, and by increasing the thickness of the backlight module, it violates the original design of the LCD module thinning.

Accordingly, the present invention provides a "direct backlight module light guide structure", in which a reflection cover, a plurality of light sources, a diffusion plate, a plurality of optical sheets, and an LCD plate are installed in order from the inside to the outside; The diffuser plate forms a plurality of light guide polygonal cones on the incidence plane and the exit plane, and since the light guide polygonal cone of the diffuser plate is installed before the light beam of the light source is incident on the LCD plate, the passing light beam is at least twice of the light guide polygonal cone. By eliminating the dark zones between the respective light sources through diffusion, it becomes a positive and active means, and the problem of the light and dark zones shown in the conventional backlight module is effectively solved, whereby the light rays of the light sources are more effectively distributed.

The present invention is a "direct backlight module light guide structure", the basic structure of the light guide structure is a "direct backlight module light guide structure" as shown in Fig. The reflected light cover 10, the plurality of light sources 20, the diffusion plate 30, several optical sheets 40 and the LCD plate 50 are installed in sequence, the several optical sheets 40 are 1 3 to 3 diffuser pieces, 0 to 2 dimming pieces, 0 to 1 reflective polarizing pieces, and the like are mixed with each other. Each light source 20 is provided between the reflective light cover 10 and the diffuser plate 30 at a predetermined interval in a straight line, U-shaped or other continuously curved lamps, or the light emitting dipoles reflected light at predetermined intervals. Installed between the cover 10 and the diffusion plate 30, as shown in Figure 3, the display effect of the LCD module is formed by the light rays emitted from each light source (20).

The focus is on: The diffusion plate 30 is provided with a plurality of light guide polygonal cones 33 on the entrance face 31 and the exit face 32, and in this embodiment, the distance between each light guide polygonal cone 33 is 1 mm. Hereinafter, since the light guide polygonal cone 33 of the diffusion plate 30 is provided before the light beam of each light source 20 enters the LCD plate 50, the passing light beam is at least twice the light guide polygonal cone 33. Through the diffusing action of the backlight module, the backlight module achieves a predetermined luminance expression effect, thereby erasing dark areas formed between the respective light sources by the positive and positive means, thereby more effectively distributing the light rays of the light sources.

Referring to FIGS. 3, 4A, and 4B simultaneously, each of the light guide polygonal cones 33 has a plurality of projecting structures as shown, in this embodiment, the height of each of the light guide polygonal cones 33 is 0.5 mm or less, Or a plurality of concave structures [shown in FIGS. 4A and 4B], each of the light guide polygon cones has a depth of 0.5 mm or less, and the protruding structure or concave structure design extends integrally with the structure of the placement on the diffusion plate. Or, the light guide polygonal cones are coupled to different curved surfaces, as shown in Figs. 5a and 5b, the light guide polygonal cone 33 composed of the surface A and the surface B, each of the light guide polygonal cone (33) The arrays of are arranged in a discontinuous state as shown in Figs. 3 and 5A and 5B, or arranged in a continuous state as shown in Figs. 6A and 6B, so that a diffusing action is formed for passing light rays.

As described above, the present invention provides a relatively preferable light guiding structure of a direct type backlight module, and applies for this utility model in accordance with the law. The above embodiments and schemes illustrate relatively preferred embodiments of the present invention, and the present invention is not limited to the above embodiments. Similar or alternative to structures, devices and features of the present invention fall within the objects and claims of the present invention.

1 is a schematic view of a conventional direct backlight module.

Figure 2 is a light guide structure arrangement state of the direct type backlight module according to the present invention.

3 is a three-dimensional exploded view of a direct type backlight module according to the present invention.

4a and 4b is another structural three-dimensional view of the light guide structure according to the present invention.

Figures 5a and 5b is a three-dimensional structure of the light guide structure according to the present invention again.

6a and 6b is another structural three-dimensional view of the light guide structure according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: reflected light cover 32: exit surface

20: light source 33: light guide groove

30: diffusion plate 40: optical sheet

31: incident surface 50: LCD plate

Claims (9)

In the light guide structure of a direct type backlight module in which a reflection cover, a plurality of light sources, a diffusion plate, a plurality of optical sheets, and an LCD plate are installed in order from the inner side to the outer side, The diffuser plate forms a plurality of light guide polygonal cones on the incidence plane and the exit plane, and since the light guide polygonal cone of the diffuser plate is installed before the light rays of the light source enter the LCD plate, the passing light beam is at least twice the light guide polygonal cone. The light guiding structure of the direct type backlight module, wherein the light rays of the light source are more effectively distributed through the diffusion of the light source.       The light guide structure of a direct type backlight module according to claim 1, wherein each light source is provided between the reflective light cover and the diffuser plate at predetermined intervals in parallel with each other in a straight line, U-shape, or continuously curved lamp.        The light guide structure of a direct type backlight module according to claim 1, wherein each light source has a light emitting dipole body disposed between the reflected light cover and the diffusion plate at predetermined intervals.       The light guide structure of a direct type backlight module according to claim 1, wherein each of the light guide polygonal cones is formed as a protruding structure extending integrally.       The light guide structure of a direct type backlight module according to claim 1, wherein each of the light guide polygonal cones is formed in a concave structure extending integrally.       The light guide structure of a direct type backlight module of claim 1, wherein each of the light guide polygonal cones is formed of different curved surfaces which are integrally formed.       The light guide structure of a direct type backlight module of claim 1, wherein a distance between each of the light guide polygonal cones is 1 mm or less.       The light guide structure of a direct type backlight module according to claim 4, wherein the height between each light guide polygonal cone is 0.5 mm or less. 6. The light guide structure of a direct type backlight module of claim 5, wherein a depth between each of the light guide polygonal cones is 0.5 mm or less.