CN107561779A - A liquid crystal display device with increased light utilization - Google Patents

Abstract

The invention relates to the technical field of liquid crystal display devices, in particular to a liquid crystal display device for increasing the utilization rate of light, which comprises a liquid crystal display panel and a backlight module, wherein the backlight module comprises a back frame, a backlight source, a light guide plate and a diffusion plate; a first reflector is arranged below the side, close to the light guide plate, of the backlight source, a second reflector is arranged above the side, close to the light guide plate, of the backlight source, the first reflector and the second reflector are obliquely arranged, and the reflecting surfaces face the backlight source; the diffuser plate includes income plain noodles and goes out the plain noodles, and the play plain noodles of diffuser plate sets up to the ripple face, and the ripple face is formed by the same arc convex surface of a plurality of shape and arc concave surface concatenation. Owing to through first speculum and second mirror, can greatly improve the light volume that gets into the light guide plate, and then increase the utilization ratio of light, in addition, because the play plain noodles of diffuser plate sets up to the ripple face, the ripple face is formed by the same arc convex surface of a plurality of shape and the concatenation of arc concave surface, has further improved light utilization ratio.

Description

A liquid crystal display device with increased light utilization

technical field

The invention relates to the technical field of liquid crystal display devices, in particular to a liquid crystal display device that increases the utilization rate of light.

Background technique

The structure of the liquid crystal display device includes a liquid crystal panel and a backlight module. The LCD panel itself does not emit light, and needs the light source provided by the backlight module to display images normally. According to different incidence 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.

In the liquid crystal display device in the prior art, the light source is generally scattered and diffused by the diffusion plate after passing through the light guide plate. However, in the prior art, the amount of the light source entering the light guide plate is not high enough, resulting in low light utilization efficiency. In addition, when the light emitted by the light source passes through the diffuser plate and exits from the light-emitting surface of the diffuser plate, since the light enters the air medium with a smaller refractive index from the diffuser plate with a larger refractive index, part of the light after entering the diffuser plate will Total reflection occurs at the light-emitting surface of the diffusion plate, so that part of the light cannot exit the diffusion plate, which further reduces the light transmittance of the diffusion plate, that is, further leads to a lower utilization rate of light.

Contents of the invention

The object of the present invention is to provide a liquid crystal display device with increased light utilization efficiency to address the shortcomings of the prior art.

To achieve the above object, the present invention provides the following technical solutions:

A liquid crystal display device for increasing light utilization is provided, including a liquid crystal display panel and a backlight module, the backlight module including a back frame, a back light source arranged in the back frame and composed of a plurality of light emitting sources, a light guide plate disposed on one side of the backlight source, and a diffusion plate disposed on the light guide plate; the liquid crystal display panel is disposed on one side of the diffusion plate;

A first reflector is provided below the side of the backlight close to the light guide plate, a second reflector is provided above the side of the backlight close to the light guide plate, and the first reflector and the second reflector The mirrors are arranged obliquely and the reflective surfaces are all facing the backlight;

The diffuser plate includes a light incident surface and a light output surface, and the light output surface of the diffuser plate is configured as a corrugated surface, and the corrugated surface is formed by splicing several arc-shaped convex surfaces and arc-shaped concave surfaces with the same shape.

The angles between the first reflecting mirror and the second reflecting mirror relative to the horizontal line are set to be 10°-30°.

The liquid crystal display device for increasing the utilization rate of light further includes a first support plate, the first support plate is arranged under the backlight source and fixed to the back frame;

One end of the first reflector is fixed to the first support plate, and the other end of the first reflector is fixed to the back frame.

A second supporting plate is arranged between the light guide plate and the liquid crystal display panel, one end of the second reflecting mirror is fixed on the second supporting plate, and the other end of the second reflecting mirror is fixed on the back frame.

The corrugated surface is formed by splicing several semicircular convex surfaces and semicircular concave surfaces with equal radii.

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

The corrugated surface and the diffusion plate are integrally structured.

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.

Beneficial effects of the present invention:

(1) A kind of liquid crystal display device that increases the utilization rate of light of the present invention, comprises liquid crystal display panel and backlight module, and backlight module comprises back frame, is arranged on the back light source that is arranged in the back frame and is formed by a plurality of light sources , a light guide plate arranged on one side of the backlight source, and a diffuser plate arranged on the light guide plate; a liquid crystal display panel is arranged on one side of the diffuser plate; A second reflector is arranged above the side of the light guide plate, the first reflector and the second reflector are both inclined and the reflective surfaces are all facing the backlight; the diffusion plate includes a light incident surface and a light exit surface, and the light exit surface of the diffusion plate is set as corrugated The corrugated surface is composed of several arc-shaped convex surfaces and arc-shaped concave surfaces of the same shape. Due to the first reflector and the second reflector, the amount of light entering the light guide plate can be greatly increased, thereby increasing the utilization rate of light. In addition, since the light-emitting surface of the diffuser plate is set as a corrugated surface, the corrugated surface consists of several The arc-shaped convex surface and the arc-shaped concave surface are spliced together, so that after the light enters the diffuser plate, it can be diffracted at the light-emitting surface and exit the diffuser plate, thereby reducing the loss of light energy and further improving the light utilization rate.

(2) A liquid crystal display device with increased light utilization rate of the present invention has the characteristics of simple structure, low production cost, and being suitable for large-scale production.

Description of drawings

FIG. 1 is a schematic structural view of a liquid crystal display device of the present invention that increases the utilization rate of light.

Reference signs:

back frame 1;

Backlight 2;

Light guide plate 3;

Diffusion plate 4, light incident surface 41, light exit surface 42, arc convex surface 401, arc concave surface 402;

Liquid crystal display panel 5;

first reflector 6;

second reflector 7;

The first support plate 8;

The second support plate 9.

detailed description

The present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

Example 1.

A kind of liquid crystal display device that increases the utilization rate of light of this embodiment, as shown in Fig. A backlight 2 composed of an array of light sources, a light guide plate 3 arranged on one side of the backlight 2, and a diffusion plate 4 arranged on the light guide plate 3; a liquid crystal display panel 5 is arranged on one side of the diffusion plate 4; the backlight 2 is close to A first reflector 6 is arranged below the side of the light guide plate 3, and a second reflector 7 is arranged above the side of the backlight 2 close to the light guide plate 3. The first reflector 6 and the second reflector 7 are both inclined and the reflecting surfaces Facing the backlight 2; the diffusion plate 4 includes a light incident surface 41 and a light exit surface 42, the light exit surface 42 of the diffusion plate 4 is set as a corrugated surface, and the corrugated surface is formed by splicing several arc-shaped convex surfaces 401 and arc-shaped concave surfaces 402 of the same shape . Due to the first reflecting mirror 6 and the second reflecting mirror 7, the amount of light entering the light guide plate 3 can be greatly increased, thereby increasing the utilization rate of light. In addition, since the light-emitting surface 42 of the diffuser plate 4 is set as a corrugated surface, the corrugated surface It is formed by splicing several arc-shaped convex surfaces 401 and arc-shaped concave surfaces 402 of the same shape, so that after light enters the diffuser plate 4, it can be diffracted at the light-emitting surface 42 and exit the diffuser plate 4, thereby reducing the loss of light energy. The utilization rate of light is further improved.

In this embodiment, the angles between the first reflecting mirror 6 and the second reflecting mirror 7 relative to the horizontal line are set to be 20 degrees. The included angle makes it possible to greatly increase the amount of light entering the light guide plate 3 through the first reflector 6 and the second reflector 7 , thereby increasing the utilization rate of light.

In this embodiment, the liquid crystal display device that increases the utilization rate of light also includes a first support plate 8, the first support plate 8 is arranged below the backlight source 2 and fixed to the back frame 1; one end of the first reflector 6 is fixed On the first support plate 8, the other end of the first reflector 6 is fixed to the back frame 1, so that the first reflector 6 can greatly increase the amount of light entering the light guide plate 3, thereby increasing the utilization rate of light.

In this embodiment, a second support plate 9 is arranged between the light guide plate 3 and the liquid crystal display panel 5, one end of the second reflector 7 is fixed to the second support plate 9, and the other end of the second reflector 7 is fixed to the back frame 1. Furthermore, through the second reflector 7, the amount of light entering the light guide plate 3 can be greatly increased, thereby increasing the utilization rate of light.

In this embodiment, the corrugated surface is formed by splicing several semicircular convex surfaces and semicircular concave surfaces with equal radii, so that after light enters the diffuser plate 4, it can be diffracted at the light exit surface 42 and exit the diffuser plate 4, thereby reducing the light energy. The loss greatly improves the utilization rate of light.

The radius of the semicircle is set to 1mm. The spliced corrugated surface of semicircles of this radius enables the light to enter the diffuser plate 4 to be diffracted at the light exit surface 42 and exit the diffuser plate 4, thereby reducing the loss of light energy and greatly improving the utilization rate of light.

In this embodiment, the corrugated surface and the diffuser plate 42 are of an integrated structure, so that after the light enters the diffuser plate 4, it can be diffracted at the light exit surface 42 and exit the diffuser plate 4, thereby reducing the loss of light energy and greatly improving the light intensity. utilization rate.

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

Example 2.

Embodiment 2 of a liquid crystal display device of the present invention that increases the utilization rate of light. The difference between this embodiment and Embodiment 1 is that in this embodiment, the first reflector 6 and the second reflector 7 are opposite to each other. The angle between the horizontal lines is set to 10 degrees. The included angle makes it possible to greatly increase the amount of light entering the light guide plate 3 through the first reflector 6 and the second reflector 7 , thereby increasing the utilization rate of light. In this embodiment, the radius of the semicircle is set to 0.5mm, and the spliced corrugated surface of the semicircle of this radius enables the light to enter the diffuser plate 4 to undergo diffraction at the light exit surface 42 and exit the diffuser plate 4, thereby reducing the light energy. The loss greatly improves the utilization rate of light. 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 and further improving the utilization rate of light. 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 liquid crystal display device of the present invention that increases the utilization rate of light. The difference between this embodiment and Embodiment 1 is that in this embodiment, the first reflector 6 and the second reflector 7 are opposite to each other. The angle between the horizontal lines is set to 30 degrees. The included angle makes it possible to greatly increase the amount of light entering the light guide plate 3 through the first reflector 6 and the second reflector 7 , thereby increasing the utilization rate of light. In this embodiment, the radius of the semicircle is set to 0.01mm, and the spliced corrugated surface of the semicircle of this radius enables the light to enter the diffuser plate 4 to undergo diffraction at the light exit surface 42 and exit the diffuser plate 4, thereby reducing the light energy. The loss greatly improves the utilization rate of light. In this embodiment, the diffusion plate 4 is a diffusion plate 4 made of HDPE plastic. 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. 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 liquid crystal display device of the present invention that increases the utilization rate of light. The difference between this embodiment and Embodiment 1 is that in this embodiment, the radius of the semicircle is set to 3 mm, and the semicircle of this radius is spliced to form The formed corrugated surface enables the light to enter the diffuser plate 4 to be diffracted at the light exit surface 42 and exit the diffuser plate 4, thereby reducing the loss of light energy and greatly improving the utilization rate of light. Other structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand , the technical solution of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

Claims (10)

1. A liquid crystal display device that increases the utilization rate of light, it is characterized in that: comprise liquid crystal display panel and backlight module, described backlight module comprises back frame, is arranged in described back frame and is arranged by a plurality of light sources A backlight source, a light guide plate disposed on one side of the backlight source, and a diffuser plate disposed on the light guide plate; the liquid crystal display panel is disposed on one side of the diffuser plate; A first reflector is provided below the side of the backlight close to the light guide plate, a second reflector is provided above the side of the backlight close to the light guide plate, and the first reflector and the second reflector The mirrors are arranged obliquely and the reflective surfaces are all facing the backlight; The diffuser plate includes a light incident surface and a light output surface, and the light output surface of the diffuser plate is configured as a corrugated surface, and the corrugated surface is formed by splicing several arc-shaped convex surfaces and arc-shaped concave surfaces with the same shape. 2. A liquid crystal display device for increasing the light utilization rate according to claim 1, characterized in that: the included angle between the first reflecting mirror and the second reflecting mirror relative to the horizontal line is set at 10 degrees to 30 degrees. Spend. 3. A liquid crystal display device for increasing the utilization rate of light according to claim 1, wherein the liquid crystal display device for increasing the utilization rate of light further comprises a first support plate, and the first support plate is set under the backlight and fixed to the back frame; One end of the first reflector is fixed to the first support plate, and the other end of the first reflector is fixed to the back frame. 4. A liquid crystal display device with increased light utilization according to claim 1, wherein a second support plate is arranged between the light guide plate and the liquid crystal display panel, and the second reflector One end of the second reflector is fixed to the second support plate, and the other end of the second mirror is fixed to the back frame. 5 . The liquid crystal display device for increasing light utilization according to claim 1 , wherein the corrugated surface is formed by splicing several semicircular convex surfaces and semicircular concave surfaces with equal radii. 6 . The liquid crystal display device according to claim 5 , wherein the radius of the semicircle is set to 0.01 mm˜3 mm. 7 . The liquid crystal display device with increased light utilization rate according to claim 1 , wherein the corrugated surface and the diffusion plate are integrally structured. 8 . 8 . A liquid crystal display device with increased light utilization according to claim 1 , wherein the diffusion plate is made of PP plastic. 9 . A liquid crystal display device with increased light utilization according to claim 1 , wherein the diffusion plate is made of PET plastic. 10 . 10 . A liquid crystal display device with increased light utilization according to claim 1 , wherein the diffusion plate is made of HDPE plastic. 11 .