CN220040799U - Light guide plate for improving lamp shadow phenomenon - Google Patents

Abstract

The utility model belongs to the technical field of light guide plates, and particularly discloses a light guide plate for improving a lamp shadow phenomenon. The utility model improves the smooth mirror surface of the existing light guide plate, in particular to a knife mark structure is added to roughen the original smooth mirror surface of the light guide plate, and the knife mark structure is utilized to split light, so that the range of a light source entering the plate body after splitting light is 100-120 degrees, thereby weakening or even eliminating the lamp shadow phenomenon.

Description

Light guide plate for improving lamp shadow phenomenon

Technical Field

The present utility model relates to a light guide plate, and more particularly to a light guide plate for improving a lamp shadow.

Background

The light guide plate (lightguide plate) is made of an optical acrylic/PC plate, and then a high-tech material with extremely high refractive index and no light absorption is used for printing light guide points on the bottom surface of the optical acrylic plate by using laser engraving, V-shaped cross grid engraving and UV screen printing technology. The light emitted from the lamp is absorbed by the optical acrylic plate and stays on the surface of the optical acrylic plate, when the light rays are emitted to each light guide point, the reflected light can be diffused towards each angle, and then the reflection condition is destroyed and emitted from the front surface of the light guide plate. The light guide plate can uniformly emit light through various light guide points with different densities and sizes. The reflector plate is used for reflecting the light exposed from the bottom surface back to the light guide plate so as to improve the use efficiency of the light; under the condition of the same area of luminous brightness, the luminous efficiency is high, and the power consumption is low.

At present, a light incidence Hotspot phenomenon often occurs in a light guide plate, wherein the Hotspot phenomenon refers to a phenomenon that in a side light guide backlight module using an LED as a light source, a light column bright area occurs in a region of the light guide plate close to the LED light source due to a limited divergence angle of the LED light source, so that uneven brightness occurs, namely, a lamp shadow phenomenon occurs. This phenomenon reduces the uniformity of the light output from the light guide plate and also affects the subjective effect of the backlight.

The trend in the current liquid crystal panels is to make them thinner, which makes the appearance requirements on the LGP side more stringent. Especially, the light incidence phenomenon is common under the backlight of the display, in the modification of the Hotspot, the prior art mainly relies on the dot layout to improve the light incidence phenomenon, and the improvement of the mirror surface of the light guide plate to improve the light incidence phenomenon is rarely reported in literature. Therefore, the utility model improves the light guide plate in another technical angle to reduce or even eliminate the lamp shadow phenomenon.

Disclosure of Invention

The utility model aims to provide a light guide plate for improving the lamp shadow phenomenon, which changes the light incidence range by arranging a knife mark structure on a smooth mirror surface of the original light guide plate so as to weaken and even eliminate the lamp shadow phenomenon.

In order to achieve the above-mentioned object, the present utility model provides a light guide plate for improving the lamp shadow phenomenon, which adopts the following technical scheme:

the utility model provides an improve light guide plate of lamp shadow phenomenon, includes the plate body, the plate body has smooth mirror surface, set up the tool mark structure on the smooth mirror surface, the tool mark structure is used for carrying out the beam split to incident light source to make after the beam split get into the scope of the light source of plate body is 100 ~ 120 degrees.

As an optimal technical scheme, the knife mark structure is used for carrying out light splitting on an incident light source, so that the range of the light source entering the plate body after light splitting is 118 degrees.

As a preferred technical solution, the tool mark structure includes a plurality of scratches disposed on the smooth mirror surface.

As the preferable technical scheme, the tool mark structure comprises a plurality of bulges, the bulges are arranged on the smooth mirror surface, and gaps exist between two adjacent bulges.

As a preferred technical solution, the distances between each two adjacent protrusions are equal.

As a preferable technical scheme, the protrusion is semi-cylindrical.

As the preferable technical proposal, the distance between the two bulges at the side edges and the two sides of the plate body is not less than 2mm.

The beneficial effects of the utility model are as follows: according to the light guide plate for improving the lamp shadow phenomenon, the smooth mirror surface of the existing light guide plate is improved, in particular, the cutter mark structure is added, so that the original smooth mirror surface of the light guide plate becomes rough, the cutter mark structure is utilized for light splitting, the range of a light source entering the plate body after light splitting is 100-120 degrees, and the lamp shadow phenomenon is weakened or even eliminated.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

Fig. 1 shows a perspective structural view of a light guide plate according to the related art.

Fig. 2 is a diagram showing the result of an optical simulation experiment using a light guide plate of the related art.

Fig. 3 illustrates a side view of a light guide plate for improving a lamp shadow phenomenon according to an embodiment of the present utility model.

Fig. 4 is a perspective view illustrating a light guide plate for improving a lamp shadow phenomenon according to an embodiment of the present utility model.

Fig. 5 is a diagram showing the result of an optical simulation experiment performed by using a light guide plate for improving a lamp shadow phenomenon according to an embodiment of the present utility model.

Fig. 6 is a graph showing the result of an optical experiment performed using a light guide plate having a smooth mirror surface on the light incident side in the related art.

Fig. 7 is a diagram showing the result of an optical experiment performed using a light guide plate for improving a lamp shadow phenomenon according to an embodiment of the present utility model.

In the figure, 1 is a mirror surface, 100 is a plate body, 200 is a smooth mirror surface, 300 is a knife mark structure, 301 is a scratch, 302 is a bump, and 303 is a gap.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples.

Fig. 1 shows a perspective view of a light guide plate in the prior art, in which a mirror surface 1 (light incident side) of the conventional light guide plate is a smooth mirror surface as shown in fig. 1, and an optical simulation test is performed using the light guide plate, and a rear range of LED light entering the light guide plate is about 82 degrees as shown in fig. 2, so that a lamp shadow phenomenon may occur.

Based on this, the technical idea of the present utility model is to increase the friction of the smooth mirror surface to improve the lamp shadow phenomenon. Therefore, as shown in fig. 3, the light guide plate for improving the light shadow phenomenon includes a plate body 100, the plate body 100 has a smooth mirror surface 200, a knife mark structure 300 is disposed on the smooth mirror surface 200, and the knife mark structure 300 is used for splitting an incident light source so that the range of the light source entering the plate body 200 after splitting is 100-120 degrees.

In this embodiment, the smooth mirror 300 is the light entrance side of the light guide plate from which the LED light sources enter into the plate body 100. As shown in fig. 3, the scribe structure 300 may be a plurality of scratches 301 formed on the smooth mirror 300, wherein the scratches 301 may be an irregular groove-like structure formed on the smooth mirror 300 by using a sharp tool, so as to achieve the effect of increasing the roughness of the light-adding side, and the plurality of scratches 301 are used to split light, so that the light shadow phenomenon is substantially eliminated when the range of the light source entering the board 200 is 100-120 degrees.

In some embodiments, smooth mirror 300 may be machined with a mill to form tool mark structure 300, such as by adjusting the mill feed rate such that smooth mirror 300 of plate 100 becomes roughened to form a pronounced tool mark structure 300.

Specifically, as shown in fig. 4, the tool mark structure 300 includes a plurality of protrusions 302, where the protrusions 302 are disposed on the smooth mirror 300, and a gap 303 exists between two adjacent protrusions 302. Wherein the plurality of bumps 302 are designed in a uniform array layout, i.e., the distances between each adjacent two of the bumps 302 are equal. And the smooth mirror surface is polished by a polishing machine, so that a semi-cylindrical protrusion 302 can be formed on the smooth mirror surface.

In some embodiments, the distance between the two protrusions 302 at the sides and the two sides of the board body 100 is not less than 2mm, that is, a space exists between the protrusions 302 and the two sides of the board body 100, and the space is left to facilitate the assembly of the light guide plate and other optical components.

In this embodiment, an optical simulation test is performed by using a conventional light guide plate with a tool mark structure as shown in fig. 4, and as shown in fig. 5, the range of LED light after being split into the plate body by the tool mark structure is about 118 degrees. Compared with fig. 2, the range of the incident light source is increased, and the lamp shadow phenomenon can be effectively avoided.

Fig. 6 is a diagram showing the result of an optical experiment performed using a light guide plate having a smooth mirror surface on the light incident side in the related art, and as shown in fig. 5, arrows in the drawing indicate partial areas where a lamp shadow exists, that is, a lamp shadow may be formed between bright and dark intervals, and a lamp shadow phenomenon exists.

Fig. 7 is a graph showing the result of an optical experiment performed using a light guide plate for improving the light shadow phenomenon according to an embodiment of the present utility model, and as shown in fig. 6, the light shadow phenomenon is not substantially present, illustrating that the present utility model can achieve elimination of the light shadow phenomenon by improving a smooth mirror surface on a light incident side.

The above embodiments are only for illustrating the present utility model, not for limiting the present utility model, and various changes and modifications may be made by one of ordinary skill in the relevant art without departing from the spirit and scope of the present utility model, and therefore, all equivalent technical solutions are also within the scope of the present utility model, and the scope of the present utility model is defined by the claims.

Claims (7)

1. The utility model provides an improve light guide plate of lamp shadow phenomenon, includes the plate body, the plate body has smooth mirror surface, its characterized in that, set up the tool mark structure on the smooth mirror surface, the tool mark structure is used for carrying out the light split to incident light source to make after the light split get into the scope of the light source of plate body is 100 ~ 120 degrees.

2. The light guide plate of claim 1, wherein the knife mark structure is used for splitting the incident light source so that the range of the light source entering the plate body after splitting is 118 degrees.

3. The light guide plate of claim 1, wherein the tool mark structure comprises a plurality of scratches disposed on the smooth mirror surface.

4. The light guide plate of claim 1, wherein the tool mark structure comprises a plurality of protrusions, the protrusions are disposed on the smooth mirror surface, and a gap exists between two adjacent protrusions.

5. The light guide plate for improving a lamp shadow phenomenon according to claim 4, wherein a distance between each adjacent two of the protrusions is equal.

6. The light guide plate of claim 4, wherein the protrusions are semi-cylindrical.

7. The light guide plate for improving a lamp shadow phenomenon according to claim 4, wherein a distance between two protrusions at the side edges and both sides of the plate body is not less than 2mm.