WO2016078120A1

WO2016078120A1 - Light guide plate, backlight module and display

Info

Publication number: WO2016078120A1
Application number: PCT/CN2014/092592
Authority: WO
Inventors: 周革革
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2014-11-17
Filing date: 2014-11-29
Publication date: 2016-05-26
Also published as: CN104375232A

Abstract

A light guide plate (10) comprises a plate body (11) and multiple accommodating grooves (13). The plate body (11) comprises a light-incident side (111) and a non-light-incident side. The accommodating grooves (13) are linearly arranged on the edge of the light-incident side (111) and penetrate the plate body (11). Each accommodating groove (13) is provided with an opening (14) that communicates the accommodating groove (13) with the outside, elastic arms (15) are formed on the two sides of each opening (14), and a pushing block is arranged in a protrusive manner at a position of each elastic arm (15) facing the corresponding accommodating groove (13). Also disclosed are a backlight module and a display. The light guide plate ensures the tightness between a strip light source and the light guide plate and improves the light-incident efficiency.

Description

Light guide plate, backlight module and display

The present invention claims priority to the prior application of the application No. 201410655764.4, entitled "Light Guide, Backlight Module and Display", filed on November 17, 2014, the contents of which are incorporated herein by reference. .

Technical field

The present invention relates to the field of liquid crystal display technologies, and in particular, to a light guide plate, a backlight module, and a display.

Background technique

At present, a liquid crystal display device has been widely used as a display component of an electronic device in various electronic products. As the electronic product is light and thin, the frame of the electronic device is designed to be narrower and narrower. The backlight module is an important component in the liquid crystal display device, and the frame of the backlight module is also required to be narrower and narrower.

The backlight module of the prior art includes a back plate, a plastic frame, and a light guide plate surrounded by a plastic frame. The light source of the light bar is disposed between the plastic frame and the light incident side of the light guide plate, and the optical film is fixed by the double-sided tape. On the plastic frame. However, in the actual assembly process, it is difficult to ensure the close contact between the light source of the light bar and the light incident side of the light guide plate, which always leaves a gap, resulting in a decrease in the light input efficiency of the light source of the light bar and the light guide plate.

Summary of the invention

The technical problem to be solved by the present invention is to provide a light guide plate, a backlight module and a display, so that the light source of the light bar of the backlight module is in close contact with the light incident side of the light guide plate.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

The present invention provides a light guide plate, the light guide plate includes a plate body and a plurality of receiving grooves, the plate body includes a light incident side and a non-light incident side, and the plurality of receiving grooves are linearly arranged on the light incident side. An edge, and penetrating the plate body; each of the receiving grooves is provided with an opening, the opening allows the receiving groove to communicate with the outside, and elastic arms are formed on both sides of the opening, each of the elastic arms facing A push block is protruded in the receiving groove.

Wherein one surface of the plate body is provided with a light homogenizing structure, so that the light emitted by the light guide plate is The other surface opposite the surface is coated with a reflective coating.

The accommodating groove includes two opposite groove side walls, and the opening is opened on a side wall of the groove away from the plate body, and the pushing block faces the other groove side wall opposite to the opening.

The present invention provides a backlight module including a back plate, a light bar light source, an optical film, and a light guide plate. The light guide plate includes a plate body and a plurality of receiving grooves, and the plate body includes a light incident side and a non-light incident side. The plurality of receiving grooves are linearly arranged on the light-incident side edge and penetrate the plate body; each of the receiving grooves is provided with an opening, the opening allows the receiving groove to communicate with the outside and is located An elastic arm is formed on each side of the opening, and each of the elastic arms is convexly disposed toward the receiving groove; the light guide plate, the light bar light source and the optical film are disposed on the back plate, and the lamp is disposed on the back plate a light source is inserted into the accommodating groove, and the push block on the elastic arm abuts the light source of the light bar, so that the light source of the light bar is in close contact with the light guide direction of the light guide plate in the accommodating groove a light plate, the optical film being laminated with the light guide plate.

The present invention provides a backlight module including a back plate, a light bar light source, an optical film, and a light guide plate. The light guide plate includes a plate body and a plurality of receiving grooves, and the plate body includes a light incident side and a non-light incident side. The plurality of receiving grooves are linearly arranged on the light-incident side edge and penetrate the plate body; each of the receiving grooves is provided with an opening, the opening allows the receiving groove to communicate with the outside and is located An elastic arm is formed on each side of the opening, and each of the elastic arms is convexly disposed toward the receiving groove; the light guide plate, the light bar light source and the optical film are disposed on the back plate, and the lamp is disposed on the back plate a light source is inserted into the accommodating groove, and the push block on the elastic arm abuts the light source of the light bar, so that the light source of the light bar is in close contact with the light guide direction of the light guide plate in the accommodating groove a light plate, the optical film is laminated with the light guide plate; wherein one surface of the plate body is provided with a light homogenizing structure, such that the light guided by the light guide plate is uniform, and the other surface opposite to the surface It is coated with a reflective coating.

The present invention provides a backlight module including a back plate, a light bar light source, an optical film, and a light guide plate. The light guide plate includes a plate body and a plurality of receiving grooves, and the plate body includes a light incident side and a non-light incident side. The plurality of receiving grooves are linearly arranged on the light-incident side edge and penetrate the plate body; each of the receiving grooves is provided with an opening, the opening allows the receiving groove to communicate with the outside and is located An elastic arm is formed on each side of the opening, and each of the elastic arms is convexly disposed toward the receiving groove; the light guide plate, the light bar light source and the optical film are disposed on the back plate, and the lamp is disposed on the back plate a light source is inserted into the accommodating groove, and the push block on the elastic arm abuts the light source of the light bar, so that the light source of the light bar is in close contact with the light guide direction of the light guide plate in the accommodating groove a light plate, the optical film is laminated with the light guide plate, wherein the housing The slot includes two opposite slot sidewalls, the opening is formed in a slot sidewall away from the board, and the push block faces the other slot sidewall opposite the opening.

The light bar light source includes a light emitting surface having a backlight area opposite to the backlight surface, and the protrusion abuts the backlight surface, and the light emitting surface is in close contact with the light guide plate.

The back plate includes a bottom plate and a side plate, and the optical film is fixed to the side walls of the light guide plate and the back plate by double-sided tape.

Wherein, a reflective sheet is disposed between the bottom plate and the light guide plate.

The present invention provides a display, a backlight module and a liquid crystal panel. The backlight module includes a back plate, a light bar light source, an optical film, and a light guide plate. The light guide plate includes a plate body and a plurality of receiving slots, and the plate The body includes a light incident side and a non-light incident side, and the plurality of receiving grooves are linearly arranged on the light incident side edge and penetrate the plate body; each of the receiving grooves is provided with an opening, and the opening is provided The accommodating groove is connected to the outside, and the elastic arms are formed on both sides of the opening, and each of the elastic arms protrudes toward the accommodating groove; the light guide plate, the light bar light source and the optical film are disposed On the backplane, the light bar light source is inserted into the receiving groove, and the push block on the elastic arm abuts the light bar light source, so that the light bar light source is in the receiving groove to the The light guide plate is in close contact with the light guide plate, and the optical film is laminated with the light guide plate; the liquid crystal panel is disposed on the backlight module, and the liquid crystal panel and the optical film are It is fixed by double-sided tape.

The light bar light source of the backlight module of the present invention is installed in the receiving groove of the light guide plate, and pushes the light bar light source through the push block provided in the receiving groove, so that the light emitting surface of the light bar light source is tight on the light entering side. The light guide plate is contacted, thereby greatly ensuring the tightness of the light bar light source and the light guide plate, and improving the light entering efficiency.

DRAWINGS

In order to more clearly illustrate the technical solutions of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, which are common in the art. For the skilled person, other drawings can be obtained as shown in these drawings without any creative work.

1 is a schematic structural view of a light guide plate in a preferred embodiment of the present invention.

Fig. 2 is an enlarged schematic view showing a portion II of the light guide plate shown in Fig. 1.

3 is a schematic cross-sectional view of a backlight module of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.

Referring to FIG. 1 and FIG. 2, a preferred embodiment of the present invention provides a light guide plate 10 including a plate body 11 and a plurality of receiving slots 13 including a light incident side 111 and a non-light incident side. (Figure is not marked). The plurality of receiving grooves 13 are linearly arranged on the edge of the light incident side 111 and penetrate the plate body 10. Each of the accommodating grooves 13 is provided with an opening 14 that communicates the accommodating groove 13 with the outside, and forms elastic arms 15 on both sides of the opening 14, each of the elastic arms 15 facing the A push block 16 is convexly disposed in the accommodating groove 13.

In this embodiment, the light guide plate 10 is a rectangular plate body, and the receiving groove 13 includes two opposite groove side walls 131, and the opening 14 is opened on the groove side wall 131 away from the plate body 11. The push block 16 faces the other slot side wall 131 opposite the opening 14.

In this embodiment, one surface of the plate body 11 is provided with a light homogenizing structure, so that the light guided by the light guide plate 10 is uniform, and the other surface opposite to the surface is coated with a reflective coating (not shown). ).

Referring to FIG. 3 , a preferred embodiment of the present invention further provides a backlight module including a light guide plate 10 , a back plate 20 , a light bar light source 30 , and an optical film 40 . The light guide plate 10, the light bar light source 30 and the optical film 40 are disposed on the back plate 20, the light bar light source 30 is inserted into the receiving groove 13, and the push block 16 on the elastic arm 15 is resisted. The light bar light source 30 is arranged such that the light bar light source 30 is in the light receiving direction of the light guide plate 10 in the light receiving direction of the light guide plate 10, and the optical film 40 is laminated with the light guide plate 10. Settings.

The back plate 20 includes a bottom plate 21 and a side plate 22 disposed around the bottom plate 21. The bottom plate 21 and the side plate 22 enclose a receiving space for receiving the light guide plate 10 , the light bar light source 30 , and the optical film 40 . The light guide plate 10 is stacked on the bottom plate 21 . In this embodiment, a reflective sheet 90 is disposed between the bottom plate 21 and the light guide plate 10. The light guide plate 10 is fixed to the side plate 22 by a double-sided tape 60.

The light bar light source 30 includes a light emitting surface 32 opposite to the backlight surface 31 of the backlight surface 31. The protrusion 16 abuts the backlight surface 31, and the light emitting surface 32 is in close contact with the light guide plate 10. The accommodating groove 13 is disposed on the light incident side 111 of the light guide plate 10 , and the light emitting surface 32 is in close contact with the light guide plate 10 on the light incident side.

The optical film 40 can be of various types of stacked arrangements such as a diffusion sheet, a prism sheet, a polarizer, and the like. The optical film 40 is fixed by the side wall 22 of the double-sided tape 50. The double-sided tape 50 is attached to the peripheral edge of the optical film 40 and the end surface of the side wall 22 to fix the optical film 40.

The light bar light source 30 of the backlight module of the present invention is installed in the accommodating groove 13 of the light guide plate 10, and pushes the light bar light source 30 through the push block 16 disposed in the accommodating groove 13, so that the light bar light source 30 is The light-emitting surface 32 closely contacts the light guide plate 10 on the light-incident side, thereby greatly ensuring the tightness of the light-strip light source 30 and the light guide plate 10, and improving the light-in efficiency.

The present invention also provides a display, the display includes the backlight module and the liquid crystal panel, the liquid crystal panel is disposed on the backlight module, and the liquid crystal panel passes between the optical film 40 and the optical film 40 The double-sided tape 50 is fixed.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It is the scope of protection of the present invention.

Claims

A light guide plate, comprising: a plate body and a plurality of receiving grooves, wherein the plate body comprises a light incident side and a non-light incident side, and the plurality of receiving grooves are linearly arranged in the light entering a side edge, and penetrating the plate body; each of the receiving grooves is provided with an opening, the opening allows the receiving groove to communicate with the outside, and elastic arms are formed on both sides of the opening, each of the elastic arms A push block is protruded toward the receiving groove.
The light guide plate according to claim 1, wherein one surface of the plate body is provided with a light homogenizing structure such that light guided by the light guide plate is uniform, and another surface opposite to the surface is coated with Reflective coating.
The light guide plate according to claim 1, wherein the accommodating groove comprises two opposite groove side walls, and the opening is opened in a side wall of the groove away from the plate body, and the push block faces and opens The opposite side wall of the other groove.
A backlight module includes a back plate, a light bar light source, and an optical film, wherein the backlight module includes a light guide plate, and the light guide plate includes a plate body and a plurality of receiving slots, and the plate body includes On the light side and the non-light-incident side, the plurality of receiving grooves are linearly arranged on the light-incident side edge and penetrate the plate body; each of the receiving grooves is provided with an opening, and the opening allows the receiving The groove is connected to the outside, and the elastic arms are formed on both sides of the opening, and each of the elastic arms protrudes toward the receiving groove; the light guide plate, the light bar light source and the optical film are disposed on the On the backplane, the light bar light source is inserted into the accommodating groove, and the push block on the elastic arm abuts the light bar light source, so that the light bar light source enters the light guide plate in the accommodating groove The light guide plate is in close contact with the light guide plate, and the optical film is laminated with the light guide plate.
A backlight module includes a back plate, a light bar light source, and an optical film, wherein the backlight module includes a light guide plate, and the light guide plate includes a plate body and a plurality of receiving slots, and the plate body includes On the light side and the non-light-incident side, the plurality of receiving grooves are linearly arranged on the light-incident side edge and penetrate the plate body; each of the receiving grooves is provided with an opening, and the opening allows the receiving The groove is connected to the outside, and the elastic arms are formed on both sides of the opening, and each of the elastic arms protrudes toward the receiving groove; the light guide plate, the light bar light source and the optical film are disposed on the On the backplane, the light bar light source is inserted into the receiving groove, and the push block on the elastic arm abuts the light bar light source, so that the light bar light source is in the capacity The light guide plate is in close contact with the light guide plate in the light incident direction of the light guide plate, and the optical film is laminated with the light guide plate; wherein one surface of the plate body is provided with a light homogenizing structure, so that the guide The light from the light panel is uniform, and the other surface opposite the surface is coated with a reflective coating.
A backlight module includes a back plate, a light bar light source, and an optical film, wherein the backlight module includes a light guide plate, and the light guide plate includes a plate body and a plurality of receiving slots, and the plate body includes On the light side and the non-light-incident side, the plurality of receiving grooves are linearly arranged on the light-incident side edge and penetrate the plate body; each of the receiving grooves is provided with an opening, and the opening allows the receiving The groove is connected to the outside, and the elastic arms are formed on both sides of the opening, and each of the elastic arms protrudes toward the receiving groove; the light guide plate, the light bar light source and the optical film are disposed on the On the backplane, the light bar light source is inserted into the accommodating groove, and the push block on the elastic arm abuts the light bar light source, so that the light bar light source enters the light guide plate in the accommodating groove The light guide plate is in close contact with the light guide plate, and the optical film is laminated with the light guide plate, wherein the receiving groove comprises two opposite groove side walls, and the groove side wall away from the plate body direction is opened An opening that faces the other slot sidewall opposite the opening.
The backlight module as claimed in claim 4, wherein the light bar light source comprises a backlight surface and a light emitting surface opposite to the backlight surface, the protrusions abut the backlight surface, and the light emitting surface is closely attached The light guide plate is described.
The backlight module as claimed in claim 5, wherein the back plate comprises a bottom plate and a side plate, and the optical film is fixed to the side walls of the light guide plate and the back plate by a double-sided tape.
The backlight module of claim 4, wherein a reflective sheet is disposed between the bottom plate and the light guide plate.
A display, comprising: a backlight module and a liquid crystal panel, wherein the backlight module comprises a back plate, a light bar light source, an optical film and a light guide plate, wherein the light guide plate comprises a plate body and a plurality of receiving slots The plate body includes a light incident side and a non-light incident side, and the plurality of receiving grooves are linearly arranged on the light incident side edge and penetrate the plate body; each of the receiving grooves is provided with an opening. The opening is configured to communicate with the outside of the receiving groove, and the elastic arms are formed on both sides of the opening, and each of the elastic arms is convexly disposed toward the receiving groove; the light guide plate, the light bar light source and An optical film is disposed on the back plate, the light bar light source is inserted into the receiving groove, and the pushing block on the elastic arm abuts the light bar light source, so that the light bar light source is in the receiving groove Inwardly, the light guide plate is in close contact with the light guide plate, and the optical film is laminated on the light guide plate; the liquid crystal panel is disposed on the backlight module. And the liquid crystal panel and the optical film are fixed by double-sided tape.