CN102116894B - Dual-light-outlet-surface light-guide plate and application thereof - Google Patents

Abstract

The invention relates to the field of optics, in particular to a light guide plate and its application. The light guide plate with double light-emitting surface includes a light guide plate body, and the light guide plate body is provided with diffusion dots or microstructures. Both surfaces are light-emitting surfaces. The double-sided display light box includes a picture panel, and a backlight module is arranged behind the picture panel. The backlight module includes a light box light source and a light guide plate. The light guide plate adopts a double light-emitting surface light guide plate. The double-sided display liquid crystal display includes a liquid crystal display panel, and a backlight module is arranged behind the liquid crystal display panel. The backlight module includes a light source and a light guide plate, and the light guide plate adopts a pair of light-emitting surface light guide plates. Due to the adoption of the above technical solution, as long as one set of light sources is used in the light guide plate with double light-emitting surfaces of the present invention, both sides of the light guide plate can guide light, thereby reducing cost, volume, and energy consumption.

Description

Double light-emitting surface light guide plate and its application

technical field

The invention relates to the field of optics, in particular to a light guide plate and its application.

Background technique

The light guide plate is one of the key components of display devices such as liquid crystal displays and ultra-thin light boxes. The quality of the light guide plate directly affects the display effect of these display devices. For example, the light guide plate will affect the brightness, uniformity, and contrast of the image displayed by the display device. An excellent light guide plate can effectively save energy and reduce energy loss while ensuring the display effect of the display device.

In the existing advertising light boxes with pictures on both sides, there is usually a light guide plate behind the two pictures. In this way, two light guide plates need to be equipped with two sets of light sources. Therefore, this advertising light box has disadvantages such as high cost, large volume, and high energy consumption.

In existing occasions where liquid crystal displays are provided, when double-sided display effects are required, two liquid crystal displays are often simply placed together back to back. It also has the disadvantages of high cost, large volume, and high energy consumption.

Contents of the invention

The object of the present invention is to provide a light guide plate with double light-emitting surfaces to solve the above technical problems.

The object of the present invention is also to provide a double-sided display light box to solve the above technical problems.

The object of the present invention is also to provide a double-sided liquid crystal display to solve the above technical problems.

The technical problem solved by the present invention can adopt following technical scheme to realize:

The light guide plate with double light-emitting surfaces includes a light guide plate body, and the light guide plate body is provided with diffusion dots or microstructures, and the light guide plate body includes a light-emitting surface for leading out light. The dots or microstructures are arranged inside the body of the light guide plate, and both surfaces of the body of the light guide plate are light-emitting surfaces.

Because the diffusion dots or microstructures are arranged inside the body of the light guide plate, light will be scattered on both surfaces of the body of the light guide plate. At the same time, because both surfaces of the light guide plate body are light-emitting surfaces for the light to exit, the light will finally be emitted from the two light-emitting surfaces on the front and back sides of the light guide plate body, forming a light guide plate with double light-emitting surfaces. It can provide light sources for display devices such as advertising panels, publicity panels, and LCD screens located on both sides of the front and back.

When the above technical solution is applied to a double-sided display light box, only one light guide plate and a group of light sources can be used in the light box, thereby reducing cost, volume and energy consumption. When the above technical solution is applied to liquid crystal displays, it provides conditions for the production of double-sided displays with a simple structure and low cost. It can make two liquid crystal displays share a light guide plate and a group of light sources, thereby reducing costs, reducing volume, and reducing energy consumption. .

The body of the light guide plate may be flat and wedge-shaped with symmetrical sides, so that the intensity of light emitted from the two light-emitting surfaces is similar.

The body of the light guide plate is provided with the diffused dots or microstructures arranged gradually and closely from the light incident side inward. The light intensity near the light-incident side is strong, and the arrangement of the diffused dots or microstructures is relatively loose; the light intensity in the distance from the light-incident side is weak, and the arrangement of the diffused dots or microstructures is relatively tight; this is conducive to the uniform distribution of light.

The body of the light guide plate is provided with the diffusion dots or microstructures whose volume gradually increases from the light incident side to the inside. The light intensity near the light-incident side is strong, and the volume of the diffused dots or microstructures is small; the light intensity in the distance from the light-incident side is weak, and the volume of the diffused dots or microstructures is large; this is conducive to the uniform distribution of light.

The light guide plate body is provided with the diffused dots or microstructures arranged in concentric circles, and the diffused dots or microstructures are gradually arranged from the outside to the center of the circle.

The light guide plate body adopts optical grade acrylic (PMMA)/PC as the base material. to reduce light loss.

The double-sided display light box includes a picture panel, and a backlight module is arranged behind the picture panel. The backlight module includes a light box light source and a light guide plate, and the light guide plate is characterized in that the light guide plate adopts a double light-emitting surface light guide plate;

The light guide plate with double light-emitting surfaces includes a light guide plate body, and the light guide plate body is provided with diffusion dots or microstructures, and the light guide plate body includes a light-emitting surface for leading out light. The microstructure is arranged inside the body of the light guide plate, and both surfaces of the body of the light guide plate are light-emitting surfaces;

A picture panel is arranged in front of the two light-emitting surfaces of the double-light-emitting-surface light guide plate.

Through the above technical solution, it is realized that a light guide plate with double light-emitting surfaces can provide light sources for two picture panels on a double-sided display light box. Further, the cost, volume and energy consumption of the double-sided display light box are reduced.

The light source of the light box can be LED light source, cold cathode lamp tube, fluorescent lamp tube and the like.

The light box light source is arranged at the bottom of the light shielding plate with double light-emitting surfaces, and the light box light source is provided with a heat dissipation system, and the heat dissipation system of the light box light source is arranged at the bottom of the light guide plate with double light-emitting surfaces to make the structure compact.

The double-sided display liquid crystal display includes a liquid crystal display panel, and a backlight module is arranged behind the liquid crystal display panel, and the backlight module includes a liquid crystal backlight source and a light guide plate, wherein the light guide plate adopts a light guide plate with a double light-emitting surface;

The light guide plate with double light-emitting surfaces includes a light guide plate body, and the light guide plate body is provided with diffusion dots or microstructures, and the light guide plate body includes a light-emitting surface for leading out light. The microstructure is arranged inside the body of the light guide plate, and both surfaces of the body of the light guide plate are light-emitting surfaces;

A liquid crystal display panel is arranged in front of the two light emitting surfaces of the light guide plate with double light emitting surfaces.

Through the above technical solution, it is possible to provide light sources for two liquid crystal display panels on a double-sided display liquid crystal display through a light guide plate with double light-emitting surfaces. Further, the cost, volume and energy consumption of the double-sided liquid crystal display are reduced.

The liquid crystal backlight is arranged on the side of the light guide plate with double light emitting surfaces, and the liquid crystal backlight is provided with a heat dissipation system, and the heat dissipation system is arranged on the side of the light guide plate with double light emitting surfaces. In order to reduce the thickness of the entire double-sided liquid crystal display.

Beneficial effects: due to the adoption of the above-mentioned technical scheme, as long as a group of light sources are used for the light guide plate with double light-emitting surfaces of the present invention, light can be emitted from both sides of the light guide plate, thereby reducing cost, volume, and energy consumption; The double-sided display light box made of light board also has double-sided display function, and also has the advantages of reducing cost, reducing volume, and reducing energy consumption; face display function.

Description of drawings

Fig. 1 is a partial structural schematic diagram of the light guide plate body of the present invention;

Fig. 2 is a partial structural schematic diagram of the double-sided display light box of the present invention;

FIG. 3 is a partial structural schematic diagram of a liquid crystal display with double-sided display in the present invention.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific diagrams.

Referring to FIG. 1 , the light guide plate with double light-emitting surfaces includes a light guide plate body 1 , and the light guide plate body 1 adopts optical grade acrylic (PMMA)/PC as the base material. The central plane of the light guide plate body 1 is provided with diffused dots or microstructures, as shown in Figure 1, the preferred diffused dots 11, the light guide plate body 1 includes a light-emitting surface 2 for leading out light, and the diffused dots 11 are arranged on the light guide plate body 1 Inside, both surfaces of the light guide plate body 1 are light emitting surfaces 2 . The light guide plate body 1 can be in the shape of a flat plate or wedge-shaped symmetrical on both sides, preferably a flat plate, so that the light energy emitted by the two light-emitting surfaces 2 is approximately equal and uniform.

The light guide plate body 1 is provided with diffused dots 11 or microstructures that gradually become denser from the light incident side to the inside. The light intensity near the light-incident side is relatively strong, and the arrangement of diffusion network dots 11 or microstructures is relatively loose; the light intensity at a distance from the light-incident side is weak, and the arrangement of diffusion network dots 11 or microstructures is relatively tight; this is conducive to uniform distribution of light. The light guide plate body 1 is provided with diffusion dots 11 or microstructures whose volume gradually increases from the light incident side to the inside. The light intensity near the light-incident side is strong, and the volume of the diffused dots 11 or the microstructure is small; the light intensity at a distance from the light-incident side is weak, and the volume of the diffused dots 11 or the microstructure is large; this is conducive to the uniform distribution of light. The light guide plate body 1 is provided with diffused dots 11 or microstructures arranged in concentric circles, and the diffused dots 11 or microstructures are gradually arranged from the outside to the center of the circle.

During specific implementation, the diffusion dots 11 or microstructures in the light guide plate body 1 can be formed by laser engraving. Diffusion dots 11 or microstructures are engraved inside the light guide plate body 1 after setting the focus position of the laser at the center of the light guide plate body 1 , and the diffusion dots 11 or microstructures form an array. The closer the diffusion dots 11 or the microstructure are to the light source, the sparser the line array is, and the farther away the light source is, the denser the line array is.

The light guide plate body 1 engraved by laser has the following characteristics:

1. In the case of the same brightness, thinner products can be used to save costs;

2. Under the same area and luminous brightness, the luminous efficiency is high and the power consumption is low;

3. High light conversion rate (more than 30% higher than traditional light guide plate body 1), uniform light, long life (indoor can be used normally for more than 20 years), safe and environmentally friendly, durable and reliable, suitable for indoor and outdoor use;

4. It can be made into special shapes, such as circle, ellipse, arc, triangle, etc.;

5. Any point light source and line light source can be used for surface light conversion. The light source includes LED, CCFL (cold cathode fluorescent tube), fluorescent tube and so on.

By controlling parameters such as the focus position, pulse time, pulse number, and pulse intensity of the laser, the parameters such as the depth, width, and length of the engraving marks formed by the laser on the light guide plate body 1 can be precisely controlled. Therefore, the distance between two adjacent diffused dots 11 or microstructures in the light guide plate body 2 is set to be less than or equal to 5mm, the depth is controlled by laser energy to be 0.001-1mm, and the diameter of the diffused dots 11 is 0.005-2mm. When the light hits the diffuser dots 11, it will diffuse in various angles, and the light guide plate body 1 can emit light evenly by using the diffuser dots 11 of various densities and sizes.

At least 4 LED chips are embedded in the light guide plate body 1, and the at least 4 LED chips are arranged to form a light source array. The arrangement should be as even as possible. At least four of the LED chips are connected in parallel and lead out a power supply lead, so as to be connected to a power supply. At least four LED chips are connected by copper wires to form a parallel relationship.

At least four of the LED chips are arranged into an array of light emitting sources, and are implanted into the light guide plate body 1 during the thermosetting molding process of the light guide plate body 1 . During production, the light guide plate body 1 is divided into two layers, namely the upper layer and the lower layer. A layer of resin-based composite material containing thermosetting resin and low-shrinkage additives is laid below to form the lower layer of the light guide plate body 1, and then an array of light-emitting light sources is arranged above the resin-based composite material, and then a layer containing thermosetting resin and low-shrinkage additives is laid. Resin-based composites with shrinkage additives are then thermally cured.

After curing, diffuser dots 11 are arranged around the LED chip to diffuse light and avoid the formation of bright spots.

2, the double-sided display light box includes a picture panel 3, and a backlight module is arranged behind the picture panel 3. The backlight module includes a light box light source 41 and a light guide plate 42. The light guide plate 42 adopts a light guide plate with double light-emitting surfaces. The light guide plate with double light exit surface, including the light guide plate body 1, the light guide plate body 1 is provided with diffusion dots 11 or microstructures, the light guide plate body 1 includes the light exit surface 2 for leading out light, and the diffusion dots 11 or microstructures are set Inside the light guide plate body 1 , both surfaces of the light guide plate body 1 are light-emitting surfaces 2 ; a picture panel 3 is provided in front of the two light-emitting surfaces 2 of the light guide plate with double light-emitting surfaces. Through the above technical solution, a light guide plate with double light-emitting surfaces can be used to provide light sources for two picture panels 3 on a double-sided display light box. The light box light source 41 can adopt LED light source, cold cathode lamp tube, fluorescent lamp tube and so on. The light box light source 41 is arranged at the bottom of the light guide plate with double light-emitting surfaces, and the light box light source 41 is provided with a heat dissipation system, and the heat dissipation system of the light box light source 41 is arranged at the bottom of the light guide plate with double light-emitting surfaces.

Referring to Fig. 3, the double-sided display liquid crystal display includes a liquid crystal display panel 5, and a backlight module is arranged behind the liquid crystal display panel 5, and the backlight module includes a liquid crystal backlight source 6 and a light guide plate 42, and the light guide plate 42 adopts a double light-emitting surface light guide plate; The light guide plate on the light output surface includes a light guide plate body 1, on which the light guide plate body 1 is provided with diffusion dots 11 or microstructures, the light guide plate body 1 includes a light exit surface 2 for leading out light, and the diffusion dots 11 or microstructures are arranged on Inside the light guide plate body 1, both surfaces of the light guide plate body 1 are light-emitting surfaces 2; a liquid crystal display panel 5 is provided in front of the two light-emitting surfaces 2 of the light guide plate with double light-emitting surfaces. Through the above technical solution, it is possible to provide light sources for two liquid crystal display panels 5 on a double-sided display liquid crystal display through a light guide plate with double light-emitting surfaces. The liquid crystal backlight 6 is arranged on the side of the light guide plate with double light emitting surfaces, and the liquid crystal backlight 6 is provided with a cooling system, and the cooling system is arranged on the side of the light guide plate with double light emitting surfaces.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. two light-outlet-surface light-guide plates, comprise a light guide plate plate body, be provided with diffusion site or microstructure on the described light guide plate plate body, described light guide plate plate body comprises for the exiting surface of deriving light, it is characterized in that, it is inner that described diffusion site or microstructure are arranged on described light guide plate plate body, and two faces of described light guide plate plate body are exiting surface;

Be provided with in the described light guide plate plate body and be described diffusion site or the microstructure that concentric circles is arranged, described diffusion site or microstructure are arranged tight gradually by the outside to circle centre position;

Be provided with described diffusion site or the microstructure of in the light inlet side direction, progressively closely arranging in the described light guide plate plate body;

Be embedded with at least 4 LED wafers in the described light guide plate plate body, at least 4 described LED wafers are arranged in luminescent source array; Draw power supply lead wire after the parallel connection of at least 4 described LED wafers;

At least 4 described LED wafers connect by copper wire, form relation in parallel; Around described LED wafer, arrange and spread the site;

Be provided with described diffusion site or the microstructure that progressively increases from light inlet side direction inner volume in the described light guide plate plate body.

2. according to claim 1 pair of light-outlet-surface light-guide plate is characterized in that, described light guide plate plate body is tabular.

3. the double-sided display lamp box comprises the picture panel, and described picture panel rear is provided with backlight module, and described backlight module comprises lamphouse light source and light guide plate, it is characterized in that, described light guide plate adopts claimed in claim 1 pair of light-outlet-surface light-guide plate;

The place ahead of two exiting surfaces of described pair of light-outlet-surface light-guide plate is equipped with a picture panel.

4. double-sided display lamp box according to claim 3 is characterized in that, described lamphouse light source adopts led light source;

Described lamphouse light source is arranged on the bottom of described pair of light-outlet-surface light-guide plate, and described lamphouse light source is provided with cooling system, and the cooling system of described lamphouse light source is arranged on the bottom of two light-outlet-surface light-guide plates.

5. two-side display LCD, comprise display panels, described display panels rear is provided with backlight module, and described backlight module comprises liquid crystal backlight and light guide plate, it is characterized in that, described light guide plate adopts claimed in claim 1 pair of light-outlet-surface light-guide plate;

The place ahead of two exiting surfaces of described pair of light-outlet-surface light-guide plate is equipped with a display panels.

6. two-side display LCD according to claim 5 is characterized in that, described liquid crystal backlight is arranged on described pair of light-outlet-surface light-guide plate side;

Described liquid crystal backlight is provided with cooling system, and described cooling system is arranged on described pair of light-outlet-surface light-guide plate side.

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