CN205787207U - Light guide plate and display device - Google Patents

Abstract

The utility model discloses a light guide plate and a display device, belonging to the technical field of display. The light guide plate includes: a light guide plate body, the light exit surface of the light guide plate body is provided with a plurality of raised structures with a narrow top and a wide bottom, each of the raised structures includes: at least two side surfaces, the at least A light-shielding layer is formed on at least one of the two side surfaces, and the area where the light-shielding layer is located is smaller than the surface area of the at least two side surfaces. The utility model solves the technical problems of complex bonding process and high manufacturing cost of the existing anti-peeping film and polarizer. The utility model realizes the beneficial effects of simplifying the anti-peeping technology in the reflective display device and reducing the manufacturing cost. The utility model is used for anti-peeping of images.

Description

Light guide plate and display device

technical field

The utility model relates to the field of display technology, in particular to a light guide plate and a display device.

Background technique

The reflective display device is a new type of display device, which can use the surrounding environmental light source as the source of illumination to display the picture. Therefore, compared with the traditional transmissive display device, the reflective display device has the advantages of energy saving and environmental protection, and is widely accepted. people's increasing attention. In the actual application process of the reflective display device, when the light emitted by the ambient light source is weak, the brightness of the reflective display device is low, and the display effect is not good. In order to solve the above problems, in the prior art, a front light source is added to the reflective display device to assist the reflective display device in displaying. After the front light source is added, the display effect of the reflective display device is better.

As reflective display devices are used in various fields of life, people put forward new requirements for reflective display devices, such as anti-peeping requirements. At present, the relatively mature anti-peeping technology is the micro-shutter technology, which applies the micro-blind anti-peeping film to the backlight module or the surface of the display screen in the display device, which can have an anti-peeping effect. On a reflective display device provided with a front light source, the anti-peeping film can be attached to a polarizer to achieve the anti-peeping effect.

However, in the existing reflective display device, the bonding process of the anti-peeping film and the polarizer is complicated, and the manufacturing cost is relatively high.

Utility model content

In order to solve the technical problems of complex lamination process and high manufacturing cost of the anti-peeping film and polarizer in the prior art, embodiments of the present invention provide a light guide plate and a display device. Described technical scheme is as follows:

In one aspect, a light guide plate is provided, comprising:

The light guide plate body, the light-emitting surface of the light guide plate body is provided with a plurality of raised structures with narrow tops and wide bottoms, and each of the raised structures includes: at least two side surfaces, one of the at least two side surfaces A light-shielding layer is formed on at least one side surface, and the area where the light-shielding layer is located is smaller than the surface area of the at least two side surfaces.

Optionally, a reflective layer is further formed on the side surface on which the light-shielding layer is formed, and the light-reflecting layer is located between the light guide plate body and the light-shielding layer.

Optionally, the raised structure is a prism structure,

A plurality of the prism structures are arranged in an array on the light-emitting surface of the light guide plate body along the scanning direction of the grid lines, and the length direction of each of the prism structures is perpendicular to the scanning direction of the grid lines or in a predetermined direction with the scanning direction of the grid lines. Set angle.

Optionally, the length of each of the prism structures is equal to the length of a side on the light guide plate perpendicular to the scanning direction of the grid lines.

Optionally, the base angle of the figure formed by the longitudinal section of the prism structure is an acute angle, and the longitudinal section is perpendicular to the light-emitting surface of the light guide plate body.

Optionally, the figure formed by the longitudinal section of the prism structure is trapezoidal or triangular.

Optionally, the prism structure is a 3-prism structure.

Optionally, a plurality of the protruding structures are arranged in a matrix on the light-emitting surface of the light guide plate body, and each of the protruding structures includes four side surfaces.

Optionally, the light incident surface of the light guide plate body is provided with light guide grid points.

In another aspect, a display device is provided, comprising:

display panel;

A light guide plate is formed on the display panel, a light source is arranged on a side of the light guide plate, and the light guide plate is any one of the above light guide plates.

In the light guide plate provided by the embodiment of the present invention, since a plurality of raised structures with narrow tops and wide bottoms are arranged on the light-emitting surface of the light guide plate body, and a light-shielding layer is formed on at least one side surface of the raised structures, realizing The anti-peeping function is improved, the anti-peeping process in the reflective display device is simplified, and the manufacturing cost is reduced.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural view of a light guide plate provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of another light guide plate provided by an embodiment of the present invention;

FIG. 3 is a partially enlarged schematic view of the light guide plate in FIG. 1;

Fig. 4 is a schematic diagram of the figure formed by the longitudinal section of the prism structure of the light guide plate provided by the embodiment of the present invention;

Fig. 5 is a schematic structural diagram of another light guide plate provided by an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a display device provided by an embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

The embodiment of the utility model provides a schematic structural diagram of a light guide plate 0, as shown in Figure 1, including:

The light guide plate body 01, the light-emitting surface of the light guide plate body 01 is provided with a plurality of raised structures 02 with a narrow top and a wide bottom. As shown in Figure 2, each raised structure 02 includes: at least two side surfaces, at least two A light-shielding layer (not shown in FIG. 1 ) is formed on at least one of the two side surfaces, and the area where the light-shielding layer is located is smaller than the surface area of at least two side surfaces. Uncovered areas can achieve display effects. In FIG. 2 , a light-shielding layer 021 is formed on one of at least two side surfaces as an example for schematic illustration.

To sum up, the light guide plate provided by the embodiment of the present invention is provided with a plurality of raised structures with narrow tops and wide bottoms on the light-emitting surface of the light guide plate body, and formed on at least one side surface of the raised structures. The light-shielding layer realizes the anti-peeping function, simplifies the anti-peeping process in the reflective display device, and reduces the manufacturing cost.

Optionally, as shown in FIG. 3, FIG. 3 is a partially enlarged schematic view of the light guide plate in FIG. Between the light-shielding layers 021. In the embodiment of the utility model, the reflective layer is used to reflect light, which can increase the utilization rate of light intensity. The reflective layer is usually made of white or silver material, and the light-shielding layer plays a role of light-shielding. The light-shielding layer is usually made of black material. , can be the same as the material of the black matrix.

In the embodiment of the present invention, as shown in FIG. 2, the raised structure 02 can be a prism structure. In the light guide plate 0, a plurality of prism structures are formed on the light guide plate body along the scanning direction of the grid line (direction x in FIG. 2). The light-emitting surfaces are arranged in an array, and the length direction of each prism structure is perpendicular to the scanning direction of the grid lines or forms a preset angle with the scanning direction of the grid lines. In practical applications, the preset included angle can be set according to specific shading requirements, so as to realize anti-peeping effects at different angles in the reflective display device.

Further, in the embodiment of the present utility model, the length of each prism structure can be equal to the side length of one side (the side where the direction y in FIG. Wait.

As shown in FIG. 4 , the bottom angle of the figure formed by the longitudinal section of the prism structure is an acute angle, and the longitudinal section is perpendicular to the light-emitting surface of the light guide plate body. The figure formed by the longitudinal section of the prism structure can be trapezoidal or triangular. When the figure formed by the longitudinal section of the prism structure is a trapezoid, the prism structure is a 4-prism structure, and when the figure formed by the longitudinal section of the prism structure is a triangle, the prism structure is a 3-prism structure. Figure 4 is a trapezoid as an example for illustration, its base angles are respectively a and b, 0°<a<90°, 0°<b<90°, and a and b can take equivalent values. The specific values of a and b can be determined according to the specific needs of the user. The larger the angle on one side of the shading surface, the higher the light transmittance and the higher the screen brightness of the display device. Correspondingly, the smaller the anti-peeping angle . The bottom angle of the figure formed by the longitudinal section of the prism structure is an acute angle, which can ensure a suitable anti-peeping angle. It should be noted that the figure formed by the above-mentioned longitudinal section can also be other figures with a narrow top and a wide bottom, which will not be described in detail in this embodiment of the present invention.

In practical applications, the specific shape of each protruding structure can also be adjusted according to the actual situation. As shown in FIG. Structure 02 includes 4 side surfaces. Shown in area M in FIG. 5 is an enlarged schematic view of a raised structure 02 . The structure of the light guide plate in FIG. 5 can be regarded as truncating each raised structure 02 in the light guide plate shown in FIG. 2 into multiple small raised structures. The above-mentioned microstructure treatment is performed on the light-emitting surface of the light guide plate, so that the light guide plate can integrate the anti-peeping function while guiding the light, so that the reflective display device has the anti-peeping function without using the anti-peeping film alone. The thickness of the display device is increased, the manufacturing process is simplified, the product cost is reduced, and the display effect of the product is improved.

Optionally, the light incident surface of the light guide plate body may be provided with light guide grid points. The light guiding grid points can enhance the light utilization efficiency.

In the embodiment of the present utility model, at least one side surface of the plurality of prism structures of the light guide plate is subjected to light-shielding treatment through the light-shielding layer, and the light guide plate is applied to the display device, so that bystanders at a specific position cannot see the display device. Screen content, so that the display device has a better anti-peeping effect. At the same time, compared with the anti-peeping design of the prior art, the display device does not need to be provided with an additional anti-peeping film, thereby simplifying the structure of the display device and reducing production costs. Effectively protect the user's personal privacy or business secrets, and can be used in vehicle display and other display fields that require anti-peeping functions.

The embodiment of the utility model provides a schematic structural diagram of a display device, as shown in FIG. 6 , including:

Display panel 1; a light guide plate 0 is formed on the display panel, and a light source is arranged on the side of the light guide plate. The light guide plate is any light guide plate provided by the embodiment of the present invention.

Further, as shown in FIG. 6, the display device may further include: a scattering film 2, a polarizer 3, an optically clear adhesive (English: Optically Clear Adhesive; OCA for short) 4 formed on the display panel in sequence, and formed on the display panel. The light source 5 on the side of the light guide plate 0 and the edge of the display panel are also formed with an integrated circuit (English: Integrated Circuit; IC for short) 6 .

The display device can be any product or component with a display function such as a liquid crystal panel, an electronic paper, an OLED panel, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. A light guide plate, characterized in that, comprising: The light guide plate body, the light-emitting surface of the light guide plate body is provided with a plurality of raised structures with narrow tops and wide bottoms, and each of the raised structures includes: at least two side surfaces, one of the at least two side surfaces A light-shielding layer is formed on at least one side surface, and the area where the light-shielding layer is located is smaller than the surface area of the at least two side surfaces. 2 . The light guide plate according to claim 1 , wherein a reflective layer is further formed on the side surface on which the light shielding layer is formed, and the light reflective layer is located between the light guide plate body and the light shielding layer. 3 . 3. The light guide plate according to claim 1 or 2, wherein the raised structure is a prism structure, A plurality of the prism structures are arranged in an array on the light-emitting surface of the light guide plate body along the scanning direction of the grid lines, and the length direction of each of the prism structures is perpendicular to the scanning direction of the grid lines or in a predetermined direction with the scanning direction of the grid lines. Set angle. 4 . The light guide plate according to claim 3 , wherein the length of each of the prism structures is equal to the side length of a side perpendicular to the scanning direction of the grid lines on the light guide plate. 5. The light guide plate according to claim 3, characterized in that, The bottom angle of the figure formed by the longitudinal section of the prism structure is an acute angle, and the longitudinal section is perpendicular to the light emitting surface of the light guide plate body. 6. The light guide plate according to claim 5, characterized in that, The figure formed by the longitudinal section of the prism structure is trapezoidal or triangular. 7. The light guide plate according to claim 3, characterized in that, The prism structure is a 3 prism structure. 8. The light guide plate according to claim 1 or 2, characterized in that, A plurality of the raised structures are arranged in a matrix on the light emitting surface of the light guide plate body, and each raised structure includes four side surfaces. 9. The light guide plate according to claim 1, characterized in that, The light incident surface of the light guide plate body is provided with light guide dots. 10. A display device, characterized in that it comprises: display panel; A light guide plate is formed on the display panel, a light source is arranged on a side of the light guide plate, and the light guide plate is the light guide plate described in any one of claims 1 to 9 .