CN210199343U

CN210199343U - Backlight light guide plate

Info

Publication number: CN210199343U
Application number: CN201921116303.4U
Authority: CN
Inventors: Aiqun Huang; 黄爱群; Xuhong Ruan; 阮绪红
Original assignee: DONGGUAN YUANLI ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: DONGGUAN YUANLI ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-03-27
Anticipated expiration: 2029-07-16

Abstract

The utility model relates to a light guide plate technical field, more specifically say, it relates to a backlight light guide plate, and its technical scheme main points are: including the light guide plate body, this light guide plate body is close to LED lamp lateral wall for going into the plain noodles, and two relative surfaces of this light guide plate body are play plain noodles and plane of reflection respectively, the plane of reflection surface has a plurality of equidistance and arranges and isosceles first V type structure, first V type structure is parallel with the income plain noodles, and is a plurality of the apex angle of first V type structure is unchangeable and the degree of depth is to keeping away from the direction crescent of going into the plain noodles, is close to the LED lamp the income plain noodles is provided with a plurality of continuous arrangement's second V type structure. The utility model discloses a backlight light guide plate has the advantage that improves the light energy utilization ratio of light guide plate light-emitting.

Description

Backlight light guide plate

Technical Field

The utility model relates to a light guide plate technical field, more specifically say, it relates to a backlight light guide plate.

Background

The light guide plate generally includes a light incident surface, a light emergent surface connected to the light incident surface, and a reflecting surface opposite to the light emergent surface. In the side-incident light source module, light emitted from a light emitting element (e.g., an LED lamp) disposed beside a side surface (i.e., an incident surface) of a light guide plate is guided to a front surface (i.e., an emergent surface) of the light guide plate through a reflecting surface to form a surface light source.

In order to make the light emitted from the light-emitting surface form a uniform surface light source, light guide points (network-shaped micro protrusions or recesses) are generally distributed on the reflecting surface, and when the light strikes each light guide point, the reflected light is diffused at various angles, and then the light is emitted from the light-emitting surface of the light guide plate after the total reflection condition is destroyed, so as to form the surface light source.

However, the light guide point makes the light guide emit from the light emitting surface, which is prone to cause uneven light distribution of the light guide plate, and thus the light guide plate has a low utilization rate of light energy.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a backlight light guide plate has improvement light guide plate light-emitting homogeneity to improve the advantage of light guide plate to light energy utilization rate.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a backlight light guide plate, includes the light guide plate body, and this light guide plate body is close to LED lamp lateral wall for going into the plain noodles, and two relative surfaces of this light guide plate body are play plain noodles and plane of reflection respectively, the plane of reflection surface has a plurality of equidistance to arrange and isosceles first V type structure, first V type structure is parallel with going into the plain noodles, and is a plurality of the apex angle of first V type structure is unchangeable and the degree of depth is to keeping away from the direction crescent of going into the plain noodles, is close to the LED lamp the income plain noodles is provided with a plurality of continuous arrangement's second V type structure.

By adopting the technical scheme, the LED lamp light source positioned on one side of the light guide plate body emits light rays into the light guide plate body from the light incident surface, the light rays are reflected to the light emergent surface through the plurality of first V-shaped structures arranged on the reflecting surface to form a surface light source, so that the same effect as a light guide point is achieved, the vertex angle of each first V-shaped structure is unchanged, the depth of each first V-shaped structure is gradually increased towards the direction far away from the light incident surface, the light energy is uniformly distributed on the light guide plate body, the loss of the light energy far away from one side of the LED lamp light source in the light guide plate body is avoided, and the light energy utilization rate of the light emitted by; because the light that the LED lamp incides into this internal light of light guide plate through going into the plain noodles is inhomogeneous, through the second V type structure of a plurality of continuous arrangements that the income plain noodles that is close to the LED lamp set up to dispersion incident light, and then improve light and enter into this internal homogeneity of light guide plate, through the cooperation of going into plain noodles and plane of reflection, thereby improve the light energy utilization ratio of light guide plate body light-emitting.

The utility model discloses further set up to: the depth arrangement mode of the first V-shaped structures adopts a Bezier curve arrangement mode.

Through adopting above-mentioned technical scheme, the degree of depth arrangement mode of first V type structure adopts Bezier curve arrangement mode can be accurate adjust first V type structure to improve light guide plate body and to light utilization ratio and homogeneity of ability.

The utility model discloses further set up to: the depth value range of the first V-shaped structure is 0.001 mm-0.05 mm.

Through adopting above-mentioned technical scheme, the degree of depth range of first V type structure is 0.001mm ~ 0.05mm, can make the comparatively even distribution of light energy on the light guide plate body to improve the light energy utilization ratio of light guide plate body light-emitting.

The utility model discloses further set up to: the vertex angle value range of the first V-shaped structure is 110  -140 .

By adopting the technical scheme, the vertex angle value range of the first V-shaped structure is 110  -140 , so that light energy can be uniformly distributed on the light guide plate body and a better light condensation effect is achieved, the emergent angle of the light ray from the light emergent surface of the light guide plate body is increased, and the reasonable utilization of the light ray in the effective visual area of the light guide plate body is improved.

The utility model discloses further set up to: the vertex angle value range of the second V-shaped structure is 80  -110 .

Through adopting above-mentioned technical scheme, the apex angle value scope of second V type structure is 80  ~ 110  can have better spotlight effect to light to improve the luminance of the light guide plate body income plain noodles incident light that keeps away from the light source.

The utility model discloses further set up to: the depth value range of the second V-shaped structure is 0.05 mm-0.1 mm.

Through adopting above-mentioned technical scheme, the degree of depth value scope of second V type structure is 0.05mm ~ 0.1mm can make even entering into the light guide plate from going into the plain noodles of light this internal.

The utility model discloses further set up to: the light guide plate body is made of polycarbonate, polymethyl methacrylate or acrylic synthetic resin materials.

By adopting the technical scheme, the light guide plate body made of polycarbonate, polymethyl methacrylate or acrylic synthetic resin material has extremely high light transmittance and reflectivity and does not absorb light.

To sum up, the utility model discloses following beneficial effect has: the LED lamp light source positioned on one side of the light guide plate body emits light rays which enter the light guide plate body from the light incident surface, the light rays are reflected to the light emergent surface through the plurality of first V-shaped structures arranged on the reflecting surface to form a surface light source, so that the same effect as a light guide point is achieved, the vertex angle of each first V-shaped structure is unchanged, the depth of each first V-shaped structure is gradually increased towards the direction far away from the light incident surface, the light energy is uniformly distributed on the light guide plate body, the loss of the light energy on one side far away from the LED lamp light source in the light guide plate body is avoided, and the light energy utilization rate of the light emergent; because the light that the LED lamp incides into this internal light of light guide plate through going into the plain noodles is inhomogeneous, through the second V type structure of a plurality of continuous arrangements that the income plain noodles that is close to the LED lamp set up to dispersion incident light, and then improve light and enter into this internal homogeneity of light guide plate, through the cooperation of going into plain noodles and plane of reflection, thereby improve the light energy utilization ratio of light guide plate body light-emitting.

Drawings

Fig. 1 is a top view of the light guide plate body in the present embodiment from the light exit surface direction;

FIG. 2 is a top view of the reflection surface of the light guide plate body in the present embodiment;

FIG. 3 is a side view of the reflection surface of the light guide plate body in the present embodiment;

fig. 4 is a bezier graph in the present embodiment.

In the figure: 1. a light guide plate body; 2. a light incident surface; 3. a light-emitting surface; 4. a reflective surface; 5. a first V-shaped structure; 6. an LED lamp; 7. a second V-shaped structure.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

A backlight light guide plate, as shown in fig. 1 and 2, comprising a light guide plate body 1, wherein the light guide plate body 1 is made of polycarbonate, polymethyl methacrylate or acrylic synthetic resin material. The side wall of the light guide plate body 1 close to the LED lamp 6 is a light incident surface 2, and two opposite surfaces of the light guide plate body 1 are a light emergent surface 3 and a reflecting surface 4 respectively.

As shown in fig. 2 and fig. 3, the surface of the reflection surface 4 has a plurality of equi-spaced isosceles first V-shaped structures 5, the first V-shaped structures 5 are parallel to the light incident surface 2, the first V-shaped structures 5 are rib structures, the apex angles of the plurality of first V-shaped structures 5 are unchanged and the depths thereof are gradually increased toward the direction away from the light incident surface 2, the light emitted from the LED lamp 6 located at one side of the light guide plate body 1 enters the light guide plate body 1 from the light incident surface 2, the light is reflected onto the light emitting surface 3 by the plurality of first V-shaped structures 5 arranged on the reflection surface 4 to form a surface light source, thereby achieving the same function as the light guide point, and the apex angles of the first V-shaped structures 5 are unchanged and the depths thereof are gradually increased toward the direction away from the light incident surface 2, thereby uniformly distributing the light energy on the light guide plate body 1, avoiding the loss of the light energy at the side away from the light source, thereby improving the light energy utilization rate of the light emitted from the light guide plate body 1.

As shown in fig. 3, specifically, the depth arrangement of the plurality of first V-shaped structures 5 is a bezier curve arrangement, and as can be seen from a bezier graph shown in fig. 4, the abscissa is the light stroke, i.e., the length of the light guide plate in the light incident direction, and the ordinate is the depth of the V-shaped structures 5, and the depth of the V-shaped structures 5 is controlled by the change of the curvature control points, so that the light energy is uniformly distributed on the light guide plate. Adopt Bezier curve arrangement mode can be accurate adjust the degree of depth of first V type structure 5 to improve the homogeneity of light guide plate body 1 to light distribution, and then improve the utilization ratio of light guide plate body 1 to the light energy.

As shown in fig. 3, the depth range of the first V-shaped structures 5 is 0.001mm to 0.05mm, so that the light can be uniformly distributed on the light guide plate body 1, thereby improving the light utilization of the light emitted from the light guide plate body 1. The vertex angle value range of the first V-shaped structure 5 is 110  -140 , so that light energy can be uniformly distributed on the light guide plate body 1 and a better light gathering effect is achieved, the angle of light emitted from the light emitting surface 3 of the light guide plate body 1 is increased, reasonable utilization of light in an effective visual area of the light guide plate body 1 is improved, and the utilization rate of the light guide plate body 1 to the light energy is further improved.

As shown in fig. 1, the light incident surface close to the LED lamp 6 is provided with a plurality of second V-shaped structures 7 arranged in series, the second V-shaped structures 7 are V-shaped groove structures, the V-shaped groove structures are perpendicular to the first V-shaped structures 5, because the light incident surface 2 of the LED lamp 6 on the light guide plate body 1 is uneven, the light incident surface 2 close to the LED lamp 6 on the light incident surface is provided with a plurality of second V-shaped structures 7 arranged in series, thereby dispersing the incident light, and further improving the uniformity of the light entering the light guide plate body 1.

As shown in fig. 1, specifically, the vertex angle of the second V-shaped structure 7 ranges from 80  to 110 , which enables light to have a better light-gathering effect, thereby improving the brightness of the incident light on the light incident surface 2 of the light guide plate body 1 far from the light source. The depth value range of the second V-shaped structures 7 is 0.05 mm-0.1 mm, and light can uniformly enter the light guide plate body 1 from the light incident surface 2.

The implementation principle of the embodiment is as follows: the light emitted by the light source of the LED lamp 6 positioned at one side of the light guide plate body 1 enters the light guide plate body 1 from the light incident surface 2, the light is reflected to the light emitting surface 3 through the plurality of first V-shaped structures 5 arranged on the reflecting surface 4 to form a surface light source, so that the same effect as a light guide point is achieved, the vertex angle of each first V-shaped structure 5 is unchanged, the depth of each first V-shaped structure is gradually increased towards the direction far away from the light incident surface 2, so that the light energy is uniformly distributed on the light guide plate body 1, the loss of the light energy at one side far away from the light source of the LED lamp 6 in the light guide plate body 1 is avoided, the light energy utilization rate of the light emitted by the light guide plate body 1 is improved, the light incident into the light guide plate body 1 through the light incident surface 2 is uneven, the incident light passes through the plurality of second V-shaped structures 7 arranged in series close to the, through the cooperation of the light incident surface 2 and the reflecting surface 4, the light energy utilization rate of the light emitted by the light guide plate body 1 is improved.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A backlight light guide plate is characterized in that: including light guide plate body (1), this light guide plate body (1) is close to LED lamp (6) lateral wall for going into plain noodles (2), and two relative surfaces of this light guide plate body (1) are play plain noodles (3) and plane of reflection (4) respectively, plane of reflection (4) surface has a plurality of equidistance and arranges and isosceles first V type structure (5), first V type structure (5) are parallel with going into plain noodles (2), and are a plurality of the apex angle of first V type structure (5) is unchangeable and the degree of depth is to keeping away from the direction crescent of going into plain noodles (2), is close to LED lamp (6) go into plain noodles (2) and be provided with a plurality of continuous arrangement's second V type structure (7).

2. The backlight light guide plate according to claim 1, wherein: the depth arrangement mode of the first V-shaped structures (5) adopts a Bezier curve arrangement mode.

3. The backlight light guide plate according to claim 2, wherein: the depth value range of the first V-shaped structure (5) is 0.001-0.05 mm.

4. The backlight light guide plate according to claim 3, wherein: the vertex angle value range of the first V-shaped structure (5) is 110  -140 .

5. The backlight light guide plate according to claim 1, wherein: the vertex angle value range of the second V-shaped structure (7) is 80  -110 .

6. The backlight light guide plate according to claim 1 or 5, wherein: the depth value range of the second V-shaped structure (7) is 0.05 mm-0.1 mm.