CN211375117U

CN211375117U - Structure for increasing light-emitting angle of backlight light guide plate

Info

Publication number: CN211375117U
Application number: CN202020077798.0U
Authority: CN
Inventors: 方泽端; 邓玉泉
Original assignee: Yidong Electronic Technology Co ltd
Current assignee: Yidong Electronic Technology Co ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-08-28
Anticipated expiration: 2030-01-15

Abstract

The utility model relates to a structure of light guide plate increase light emitting angle of backlight, the backlight has set gradually shading rubberizing cloth, upward membrane, diffusion barrier, light guide plate and reflecting plate under to from last, and reflecting plate one side is provided with the gluey frame that is used for fixed light guide plate, the lateral wall of light guide plate sets up the income plain noodles in the place ahead of light source, go into the plain noodles and establish towards the light guide plate center is concave, the light source comprises a plurality of LED lamp pearls that encircle in the income plain noodles outside, it is provided with a plurality of light guide grooves to go into the plain noodles interval. The utility model discloses a going into the plain noodles that the inward recess was established, surrounding type set up the sawtooth structure that a plurality of light guide groove formed on going into the plain noodles, the LED lamp pearl outside going into the plain noodles formed for LED's light is abundant scatters, improves the homogeneity and the optics taste of backlight, promotes the reliability and the quality of backlight module, improves the production yield of backlight module, thereby reduction in production cost improves the performance of enterprises.

Description

Structure for increasing light-emitting angle of backlight light guide plate

Technical Field

The utility model relates to a backlight technical field, in particular to structure of light guide plate increase luminous angle of backlight.

Background

The backlight source is a light source located at the back of the liquid crystal display, and the light emitting effect of the backlight source directly influences the visual effect of the liquid crystal display module. At present, traditional backlight, run into special-shaped product, the bright line structure is prevented in the visible region of backlight light guide plate as disclosed in the chinese utility model patent with application number CN201822248008.6, it has circular shape light guide plate, because of the shape of light guide plate, make the light guide plate go into the light side than narrower, make the light of light source can not disperse completely in order to cover whole display area, the homogeneity and the taste that lead to the backlight are on the low side, current product generally adopts to increase light source quantity and improves its taste, but this mode is limited to the structure of light guide plate, the solution problem that can not be fine, and the consumption and the cost of product have been increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the deficiency of the prior art, the utility model provides a backlight light guide plate increases light emitting angle's structure, it is under not increasing cost and consumption basis, improves the homogeneity and the optics taste of product, wherein does not increase cost and consumption and indicates not increase the quantity of light source, do not promote the power of light source.

In order to achieve the above purpose, the utility model provides a technical scheme does: the utility model provides a backlight light guide plate increases luminous angle's structure, the backlight has set gradually under to from last shading pastes cloth, goes up the membrane of adding lustre to, adds lustre to membrane, diffusion barrier, light guide plate and reflecting plate down, and reflecting plate one side is provided with the gluey frame that is used for fixed light guide plate, the lateral wall of light guide plate sets up the income plain noodles in the place ahead of light source, go into the plain noodles and establish towards the light guide plate center is concave, the light source comprises a plurality of LED lamp pearls that encircle in the income plain noodles outside, it is provided with a plurality of.

In the above technical solution, the light guide grooves are arranged along the thickness direction of the light guide plate, and the distance between two adjacent light guide grooves is 0.3 mm.

In the above technical scheme, the light guide groove is a V-shaped wire groove with an included angle of 80 degrees, and the depth of the light guide groove is 0.09 mm.

In the above technical solution, the light incident surface is composed of a first light incident surface, a second light incident surface and a third light incident surface which are connected in sequence; the first light incident surface, the second light incident surface and the third light incident surface are planes, the second light incident surface is perpendicular to the radial direction of the light guide plate, and the first light incident surface, the third light incident surface and the second light incident surface form an included angle of 174.5 degrees to form an approximately arc-shaped light incident surface.

In the above technical scheme, the light incident surface is an arc surface.

In the above technical solution, the diffusion film is provided with a black light absorption adhesive tape at a position close to the light incident surface.

In the technical scheme, the rubber frame is composed of an iron body and an outer cover wrapped outside the iron body.

In the technical scheme, the number of the LED lamp beads is six, the six LED lamp beads are fixed on the FPC board, the FPC board is fixed on the rubber frame through the double faced adhesive tape, and the LED lamp beads are fixed on the outer side of the light incidence surface.

The utility model has the advantages of reasonable structure, novel design and strong practicability, the light of the LED is fully dispersed through the concave light incoming surface, the LED lamp beads arranged outside the light incoming surface in a surrounding way and the sawtooth structure formed by the plurality of light guide grooves on the light incoming surface, the uniformity of the backlight module reaches more than 80 percent, meanwhile, the diffusion film adopts the covering black light absorption adhesive tape at the position close to the light incoming surface, the problem of light spots generated by over-close approach of two LEDs is avoided, the taste of the backlight is improved, on the basis of not increasing cost and power consumption, under the condition that the quantity of the LED lamp beads of the light source is limited, the light of the light source is maximally dispersed on the light guide plate, the uniformity and the optical taste of the backlight are improved, the reliability and the quality of the backlight module are improved, the production yield of the backlight module is improved, thereby reducing the production cost, and the enterprise benefit is improved.

Drawings

Fig. 1 is a schematic view of the exploded structure of the present invention.

Fig. 2 is a schematic plan view of a light guide plate.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

In the figure: 1. shading sticking cloth; 2. an upper brightness enhancement film; 3. a lower brightness enhancement film; 4. a diffusion membrane; 41. (ii) a 5. A light guide plate; 6. a reflective plate; 7. a rubber frame; 8. an FPC board; 80. LED lamp beads; 81. double-sided adhesive tape; 9. a light incident surface; 91. a first light incident surface; 92. a second light incident surface; 93. a third light incident surface; 94. a light guide groove.

Detailed Description

The embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1-3, a structure for increasing the light emitting angle of a backlight light guide plate 5, the backlight is sequentially provided with a shading patch 1, an upper brightness enhancement film 2, a lower brightness enhancement film 3, a diffusion film 4, a light guide plate 5 and a reflection plate 6 from top to bottom, one side of the reflection plate 6 is provided with a rubber frame 7 for fixing the light guide plate 5, the side wall of the light guide plate 5 is provided with a light incident surface 9 in front of a light source, the light incident surface 9 is concavely arranged toward the center of the light guide plate 5, the light source is composed of a plurality of LED lamp beads 80 surrounding the outside of the light incident surface 9, and the light incident.

The light guide grooves 94 are arranged along the thickness direction of the light guide plate 5, and the distance between two adjacent light guide grooves 94 is 0.3 mm.

The light guide groove 94 is a V-shaped wire groove with an included angle of 80 degrees, and the depth of the light guide groove 94 is 0.09 mm.

The light incident surface 9 is composed of a first light incident surface 91, a second light incident surface 92 and a third light incident surface 93 which are connected in sequence; the first light incident surface 91, the second light incident surface 92 and the third light incident surface 93 are all planes, the second light incident surface 92 is perpendicular to the radial direction of the light guide plate 5, and the first light incident surface 91, the third light incident surface 93 and the second light incident surface 92 form an included angle of 174.5 degrees to form an approximately arc-shaped light incident surface 9. The light incident surface 9 may be a curved surface.

The diffusion film 4 is provided with a black light absorbing adhesive at a position near the light incident surface 9. The light overlapping parts of the two LED lamp beads which are too close to each other can generate interference to generate light spots, and the light spots are absorbed and shielded by the light absorption adhesive tapes.

The rubber frame 7 is composed of an iron body and an outer cover wrapped outside the iron body. The rubber frame 7 serves as a supporting frame of the whole backlight source, and the good supporting performance of the rubber frame is guaranteed through the iron body, so that the backlight source is prevented from being broken easily.

The number of the LED lamp beads 80 is six, the six LED lamp beads 80 are fixed on the FPC board 8, the FPC board 8 is fixed on the rubber frame 7 through the double faced adhesive tape 81, and the LED lamp beads 80 are fixed on the outer side of the light incident surface 9.

The utility model has reasonable structure, novel design and strong practicability, and the sawtooth structure is formed by the concave light-in surface 9, the LED lamp beads 80 which are arranged around the outside of the light-in surface 9 and the plurality of light guide grooves 94 on the light-in surface 9, so that the light of the LED is fully dispersed, the uniformity of the backlight module reaches more than 80 percent, meanwhile, the position of the diffusion film 4 close to the light incident surface 9 is covered with a black light absorption adhesive tape, so that the problem of light spots generated by the over-close of two LEDs is avoided, the taste of the backlight source is improved, on the basis of not increasing cost and power consumption, under the limited condition of LED lamp pearl 80 quantity of light source, furthest spreads the optics of light source on light guide plate 5, improves the homogeneity and the optics taste of backlight, promotes the reliability and the quality of backlight module, improves the production yield of backlight module to reduction in production cost improves the performance of enterprises.

The above is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications to the above embodiments are all within the scope of the present invention.

Claims

1. The utility model provides a backlight light guide plate increases luminous angle's structure, the backlight is from last to having set gradually down shading paste cloth, go up the membrane of adding lustre to, diffusion barrier, light guide plate and reflecting plate down, and reflecting plate one side is provided with the gluey frame that is used for fixed light guide plate, a serial communication port, the lateral wall of light guide plate sets up the income plain noodles in the place ahead of light source, go into the plain noodles and establish towards the light guide plate center is concave, the light source comprises a plurality of LED lamp pearls that encircle in the income plain noodles outside, it is provided with.

2. The structure for increasing the light-emitting angle of a light guide plate of a backlight according to claim 1, wherein the light guide grooves are disposed along the thickness direction of the light guide plate, and the distance between two adjacent light guide grooves is 0.3 mm.

3. The structure for increasing the light emitting angle of the light guide plate of the backlight source of claim 2, wherein the light guide grooves are V-shaped grooves with an included angle of 80 degrees, and the depth of the light guide grooves is 0.09 mm.

4. The structure for increasing the light emitting angle of the light guide plate of the backlight source of claim 3, wherein the light incident surface is composed of a first light incident surface, a second light incident surface and a third light incident surface which are sequentially connected; the first light incident surface, the second light incident surface and the third light incident surface are planes, the second light incident surface is perpendicular to the radial direction of the light guide plate, and the first light incident surface, the third light incident surface and the second light incident surface form an included angle of 174.5 degrees to form an approximately arc-shaped light incident surface.

5. The structure for increasing the light emitting angle of a light guide plate of a backlight source of claim 3, wherein the light incident surface is an arc surface.

6. The structure for increasing the light-emitting angle of a light guide plate of a backlight according to claim 4, wherein the diffusion film is provided with a black light-absorbing adhesive at a position close to the light-incident surface.

7. The structure for increasing the light-emitting angle of a light guide plate of a backlight source of claim 6, wherein the plastic frame is composed of an iron body and an outer cover wrapped outside the iron body.

8. The structure for increasing the light emitting angle of the light guide plate of the backlight source of claim 7, wherein the number of the LED lamp beads is six, the six LED lamp beads are fixed on an FPC board, the FPC board is fixed on a rubber frame through a double-sided adhesive tape, and the LED lamp beads are fixed outside the light incident surface.