CN207249298U - A backlight module and a display capable of improving the dynamic contrast of a display picture - Google Patents

Abstract

The utility model relates to the technical field of backlight modules, and specifically to a backlight module and a display capable of improving the dynamic contrast of a display image, which comprises a back frame, a plurality of mutually arranged backlight sources arranged in the back frame, a light guide plate arranged on one side of the backlight source, a diffusion plate arranged on the light guide plate, a first light shielding plate fixed to the upper part of the light guide plate and the back frame, and a second light shielding plate fixed to the lower part of the light guide plate and the back frame; a reflective film is arranged on the side of the light guide plate opposite to the backlight source; the diffusion plate comprises a light incident surface and a light emitting surface, and the light emitting surface of the diffusion plate is formed by splicing a plurality of semicircles arranged in sequence. The backlight module and the display can avoid mutual interference between the light sources, and enhance the regional light control capability of the liquid crystal display, thereby improving the dynamic contrast of the display image of the liquid crystal display.

Description

A backlight module and a display capable of improving the dynamic contrast of a display picture

technical field

The utility model relates to the technical field of backlight modules, in particular to a backlight module and a display capable of improving the dynamic contrast of a display picture.

Background technique

The structure of a liquid crystal display includes a liquid crystal panel and a backlight module. The liquid crystal panel itself does not emit light, and needs the light source provided by the backlight module to display images normally. Therefore, the backlight module becomes one of the key components of the liquid crystal display. According to different incident modes of the light source, the backlight module can be divided into a direct-type backlight module and an edge-type backlight module. Among them, the side-type backlight module is to install the backlight LED strip on the edge of the back panel behind the liquid crystal panel. The light emitted by the LED strip enters the light guide plate from the light incident surface on one side of the light guide plate and is reflected and diffused. It emits from the light-emitting surface of the light guide plate, and then passes through the optical film group to form a surface light source and provide it to the liquid crystal panel.

The backlight module in the prior art, because its light source generally includes several backlight sources arranged with each other, however, because each light source is easy to interfere with each other, the regional light control ability of the liquid crystal display is weakened, thereby reducing the performance of the liquid crystal display. Displays the dynamic contrast of the screen.

Utility model content

In view of the above-mentioned technical problems in the prior art, one of the purposes of the present invention is to provide a backlight module capable of improving the dynamic contrast of the display screen.

In view of the above-mentioned technical problems in the prior art, the second purpose of the present utility model is to provide a display.

In order to achieve one of the above objects, the utility model provides the following technical solutions:

A backlight module capable of improving the dynamic contrast of a display screen is provided, comprising a back frame, a plurality of mutually arranged backlights arranged in the back frame, a light guide plate arranged on one side of the backlight, and a light guide plate arranged in the backlight. The diffusion plate on the light guide plate, the first light shielding plate fixed on the upper part of the light guide plate and the back frame, and the second light shielding plate fixed on the lower part of the light guide plate and the back frame;

A reflective film is provided on the side of the light guide plate opposite to the backlight source;

The diffuser plate includes a light incident surface and a light output surface, and the light output surface of the diffuser plate is formed by splicing several semicircles arranged in sequence.

The radius of the semicircle is set to be 0.01mm-3mm.

The radius of the semicircle is set to 0.5 mm.

The radius of the semicircle is set to 1 mm.

The light-emitting surface formed by splicing several sequentially arranged semicircles is integral with the diffusion plate.

The diffusion plate is a diffusion plate made of PP plastic.

The diffusion plate is made of PET plastic.

The diffusion plate is a diffusion plate made of HDPE plastic.

In order to achieve the above-mentioned purpose two, the utility model provides the following technical solutions:

A display is provided, which includes the above-mentioned backlight module capable of improving the dynamic contrast of a display picture.

The beneficial effects of the utility model:

(1) A backlight module capable of improving the dynamic contrast of the display screen of the present utility model includes a back frame, several mutually arranged back light sources arranged in the back frame, a light guide plate arranged on one side of the back light source, a set The diffusion plate on the light guide plate, the first light shielding plate fixed on the upper part of the light guide plate and the back frame, and the second light shielding plate fixed on the lower part of the light guide plate and the back frame; the side of the light guide plate opposite to the backlight is provided with a reflective film; The diffuser plate includes a light incident surface and a light output surface, and the light output surface of the diffuser plate is spliced by several semicircles arranged in sequence. Since the first light-shielding plate and the second light-shielding plate are provided, it is possible to avoid mutual interference between the various light sources, and enhance the regional light control ability of the liquid crystal display, thereby improving the dynamic contrast of the display screen of the liquid crystal display. In addition, due to the light guide plate A reflective film is provided on the side opposite to the backlight source, and the reflective film can improve the utilization rate and contrast of the light source, and further improve the dynamic contrast of the display screen of the liquid crystal display. In addition, since the light-emitting surface of the diffuser plate is spliced by several semicircles arranged in sequence, the light can be diffracted at the light-emitting surface after entering the diffuser plate and exit the diffuser plate, thereby reducing the loss of light energy and further improving the light intensity. utilization and dynamic contrast.

(2) A backlight module capable of improving the dynamic contrast of the display screen of the utility model has the characteristics of simple structure, low production cost, and suitable for large-scale production.

(3) A kind of display of the utility model, owing to comprise a kind of backlight module that can improve the dynamic contrast ratio of display picture of the utility model, and then improve the dynamic contrast ratio of the display picture of liquid crystal display.

Description of drawings

FIG. 1 is a structural schematic diagram of a backlight module capable of improving the dynamic contrast of a display screen according to the present invention.

Reference signs:

back frame 1;

Backlight 2;

Light guide plate 3;

Diffusion plate 4, light incident surface 41, light exit surface 42, semicircle 401;

the first shading plate 5;

The second shading plate 6;

reflective film7.

Detailed ways

The utility model is described in detail below in conjunction with specific embodiments and accompanying drawings.

Example 1.

A kind of backlight module that can improve the dynamic contrast ratio of the display screen of this embodiment, as shown in Figure 1, includes a back frame 1, several mutually arranged backlight sources 2 arranged in the back frame 1, arranged on the backlight source 2 The light guide plate 3 on one side, the diffusion plate 4 arranged on the light guide plate 3, the first light shielding plate 5 fixed on the upper part of the light guide plate 3 and the back frame 1, and the second light shielding plate fixed on the lower part of the light guide plate 3 and the back frame 1 plate 6; the side of the light guide plate 3 opposite to the backlight 2 is provided with a reflective film 7; the diffuser plate 4 includes a light incident surface 41 and a light output surface 42, and the light output surface 42 of the diffuser plate 4 is spliced by several semicircles 401 arranged in sequence . Since the first light-shielding plate 5 and the second light-shielding plate 6 are provided, mutual interference between various light sources can be avoided, and the regional light control ability of the liquid crystal display can be enhanced, thereby improving the dynamic contrast of the display screen of the liquid crystal display. In addition, since the reflective film 7 is provided on the side of the light guide plate 3 opposite to the backlight source 2, the reflective film 7 can improve the utilization rate and contrast of the light source, and further improve the dynamic contrast of the display screen of the liquid crystal display. In addition, since the light-emitting surface 42 of the diffuser 4 is spliced by several semicircles 401 arranged in sequence, light entering the diffuser 4 can be diffracted on the light-emitting surface 42 and exit the diffuser 4, thereby reducing the light energy. loss, further improving light utilization and dynamic contrast.

In this embodiment, the radius of the semicircle 401 is set to 0.5mm, and the light-emitting surface 42 formed by splicing the semicircles 401 of this radius can make the light enter the diffuser plate 4 and be diffracted at the light-emitting surface 42 to exit the diffuser plate 4, and then The loss of light energy is reduced, the light utilization rate is further improved, and the dynamic contrast ratio is further improved.

In this embodiment, the light-emitting surface 42 and the diffusion plate 4 formed by splicing several sequentially arranged semicircles 401 are of an integrated structure, thereby reducing loss of light energy, further improving light utilization efficiency, and further improving dynamic contrast.

In this embodiment, the diffusion plate 4 is a diffusion plate 4 made of PP plastic. The diffuser plate 4 made of PP plastic can facilitate the scattering and diffusion of light, thereby reducing the loss of light energy, further improving the utilization rate of light, and further improving the dynamic contrast.

Example 2.

Embodiment 2 of a backlight module that can improve the dynamic contrast of the display screen of the present utility model. The difference between this embodiment and Embodiment 1 is that in this embodiment, the radius of the semicircle is set to 1mm, and the radius of the radius The light-emitting surface 42 formed by the splicing of the semicircles 401 can make the light enter the diffusion plate 4 and be diffracted at the light-emitting surface 42 to exit the diffusion plate 4, thereby reducing the loss of light energy, further improving the utilization rate of light, and further improving the dynamic performance. contrast. In this embodiment, the diffusion plate 4 is a diffusion plate 4 made of PET plastic, the diffusion plate 4 made of PET plastic can facilitate the scattering and diffusion of light, thereby reducing the loss of light energy, further improving the utilization rate of light, and further Improve dynamic contrast. Other structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

Example 3.

Embodiment 3 of a backlight module that can improve the dynamic contrast of the display screen of the present utility model. The difference between this embodiment and Embodiment 1 is that in this embodiment, the radius of the semicircle is set to 0.01mm, and the radius The light emitting surface 42 spliced by the semicircles 401 can make the light enter the diffuser plate 4 and can be diffracted at the light emitting surface 42 to exit the diffuser plate 4, thereby reducing the loss of light energy, further improving the light utilization rate, and further improving Dynamic contrast. In this embodiment, the diffusion plate 4 is a diffusion plate 4 made of HDPE plastic, and the diffusion plate 4 made of HDPE plastic can facilitate the scattering and diffusion of light, thereby reducing the loss of light energy and further improving the utilization rate of light. Further improve dynamic contrast. Other structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

Example 4.

Embodiment 4 of a backlight module that can improve the dynamic contrast of the display screen of the present utility model. The difference between this embodiment and Embodiment 1 is that in this embodiment, the radius of the semicircle is set to 3mm, and the radius of the radius The light-emitting surface 42 formed by the splicing of the semicircles 401 can make the light enter the diffusion plate 4 and be diffracted at the light-emitting surface 42 to exit the diffusion plate 4, thereby reducing the loss of light energy, further improving the utilization rate of light, and further improving the dynamic performance. contrast. Other structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

Example 5.

A display of the present invention comprises a backlight module capable of improving the dynamic contrast of a display picture according to Embodiment 1, thereby improving the dynamic contrast of a display picture of a liquid crystal display.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (9)

1. A kind of 1. backlight module for the dynamic contrast that can improve display picture, it is characterised in that：Including back frame, be arranged at it is described Several mutually arranged backlights in back frame, be arranged at the light guide plate of the backlight side, be arranged at the light guide plate On diffuser plate, be fixed on first shadow shield on the light guide plate top and the back frame and be fixed under the light guide plate Portion and the second shadow shield of the back frame；

   The side of the relatively described backlight of the light guide plate is provided with reflectance coating；

   The diffuser plate includes incidence surface and light-emitting surface, and the semicircle that the light-emitting surface of the diffuser plate is arranged in order by several splices Form.
2. A kind of 2. backlight module of dynamic contrast that can improve display picture according to claim 1, it is characterised in that： The radius of the semicircle is arranged to 0.01mm~3mm.
3. A kind of 3. backlight module of dynamic contrast that can improve display picture according to claim 2, it is characterised in that： The radius of the semicircle is arranged to 0.5mm.
4. A kind of 4. backlight module of dynamic contrast that can improve display picture according to claim 2, it is characterised in that： The radius of the semicircle is arranged to 1mm.
5. A kind of 5. backlight module of dynamic contrast that can improve display picture according to claim 1, it is characterised in that： The light-emitting surface that the semicircle being arranged in order by several is spliced and the diffuser plate are integrative-structures.
6. A kind of 6. backlight module of dynamic contrast that can improve display picture according to claim 1, it is characterised in that： The diffuser plate is diffuser plate made of PP plastics.
7. A kind of 7. backlight module of dynamic contrast that can improve display picture according to claim 1, it is characterised in that： The diffuser plate is diffuser plate made of PET plastic.
8. A kind of 8. backlight module of dynamic contrast that can improve display picture according to claim 1, it is characterised in that： The diffuser plate is diffuser plate made of HDPE plastic.
9. A kind of 9. display, it is characterised in that：One kind that the display includes described in claim 1 to 8 any one can carry The backlight module of the dynamic contrast of high display picture.