CN110221380A - A kind of light guide plate and the backlight module with light guide plate composition - Google Patents

Abstract

The invention provides a light guide plate and a backlight module composed of the light guide plate. The light guide plate comprises: a body, the body is formed as a rectangular plate body, and a top corner of the light guide plate is recessed toward the center of the body to form an arc-shaped light incident surface; The two sides of the main body adjacent to the light incident surface respectively form light outgoing surfaces, and the main body also includes two oppositely arranged upper surfaces and lower surfaces; the first fixing piece is formed into an arc with the same arc as the arc-shaped light incident surface. A long strip, one side of the first fixing member is connected to the light incident surface, and the first fixing member is provided with a first placement groove for placing the light source; the grating layer, the grating layer is arranged on the upper surface to transmit the oblique light emitted from the body Converted to light that is perpendicular to the body surface and radiates sideways. The light guide plate according to the embodiment of the present invention not only has a simple structure and is easy to install and disassemble, but also can improve the light extraction effect, improve the picture quality and reduce the cost.

Description

A light guide plate and a backlight module composed of the light guide plate

technical field

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

Background technique

The backlight module is the light source provider of the liquid crystal display. As the application of the liquid crystal display becomes more and more widely, people have higher and higher requirements on the overall cost performance of the backlight module. The light guide plate is an important component of the backlight module. In the prior art, the light emitted by the light source (such as light-emitting diodes) enters the light guide plate and is emitted through the light guide plate. Small, resulting in the formation of dark areas on both sides of the light guide plate because the light cannot be effectively illuminated, reducing the utilization rate of light. In the prior art, the utilization rate of light is usually increased by adding structures such as prism sheets. However, the prism sheets are easily broken and worn, which is inconvenient for installation. In addition, the fixing of the light source is usually troublesome. It is necessary to re-fix and fix the specific light source mounting part near the light guide plate to install the light source. The structure is complicated and the process is complicated. Once the light source is fixed, it is inconvenient to adjust the distance between the light source and the light guide plate. Limited scope and lack of versatility and flexibility.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a light guide plate, which can also improve the light extraction effect, improve the image quality, and reduce the cost.

The present invention also provides a backlight assembly.

The light guide plate according to the embodiment of the first aspect of the present invention includes: a body, the body is formed as a rectangular plate body, one top corner of the light guide plate is recessed toward the center of the body to form an arc-shaped light incident surface, and the body The two side surfaces adjacent to the light incident surface respectively form light exit surfaces, and the body further includes two oppositely arranged upper surfaces and lower surfaces; An arc-shaped strip with the same smooth surface radian, one side of the first fixing member is connected to the light incident surface, and a first placing groove for placing the light source is arranged on the first fixing member; the grating layer, the A grating layer is provided on the upper surface to convert the oblique light emitted from the body into light that is perpendicular to the surface of the body and diverges laterally.

According to the light guide plate of the embodiment of the present invention, one side of the main body is recessed inward to form an arc-shaped light incident surface, the first fixing member is connected to the light incident surface of the main body, the light source is fixed on the first fixing member, and the main body is provided with a grating The light guide plate is not only simple in structure, easy to install and disassemble, but also can improve the light output effect, improve the picture quality and reduce the cost.

The light guide plate according to the embodiment of the present invention may further have the following additional technical features.

According to an embodiment of the present invention, the other side of the first fixing member is provided with at least one first installation groove, and further includes: a second fixing member, and the second fixing member is formed to have an arc with the light incident surface The same arc-shaped strip, the side of the second fixing member facing the first fixing member is provided with a first protrusion that matches with the first installation groove, and the second fixing member is provided with a first protrusion. Two placement slots.

According to an embodiment of the present invention, the other side of the second fixing member is provided with at least one second installation groove, and further includes: a third fixing member, the third fixing member is formed to have an arc with the light incident surface The same arc-shaped strip, the side of the third fixing member facing the second fixing member is provided with a second protrusion that matches with the second installation groove, and the third fixing member is provided with a second protrusion. Three placement slots.

According to an embodiment of the present invention, the first fixing member and the body are integrally formed.

According to an embodiment of the present invention, the first placement groove, the second placement groove, and the third placement groove are respectively formed as rectangular grooves.

According to an embodiment of the present invention, the sizes of the first fixing member, the second fixing member and the third fixing member are respectively equal.

According to an embodiment of the present invention, the size of the first fixing member is larger than the size of the second fixing member, and the size of the second fixing member is larger than the size of the third fixing member.

According to an embodiment of the present invention, the light guide plate further comprises: a rubber pad, the rubber pad is arranged in the first placement groove to fix the light source.

The backlight module according to the embodiment of the second aspect of the present invention includes: the light guide plate according to the above embodiment; a light source, the light source is installed in the first placement slot, the second placement slot or the third placement slot; a reflective plate, The reflection plate is arranged on the lower surface of the light guide plate.

According to an embodiment of the present invention, the backlight module further includes: an installation frame, the installation frame is arranged on the circumferential direction of the light guide plate and the reflection plate to support the light guide plate and the reflection plate.

Description of drawings

1 is a schematic structural diagram of a body of a light guide plate according to an embodiment of the present invention;

2 is a schematic structural diagram of a light guide plate according to an embodiment of the present invention;

3 is another schematic structural diagram of a light guide plate according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of the second fixing member of the light guide plate according to the embodiment of the present invention.

Reference number:

light guide plate 100; main body 10; first fixing piece 20; first placing slot 21; first mounting slot 22; light incident surface 23; light emitting surface 24; grating layer 30; second fixing piece 40; The second placement slot 41 ; the third fixing member 50 ; the third placement slot 51 .

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientation or positional relationship indicated by "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or element It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, features delimited with "first", "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The light guide plate 100 according to the embodiment of the present invention will be specifically described below with reference to the accompanying drawings.

The light guide plate 100 according to the embodiment of the first aspect of the present invention includes a body 10 , a first fixing member 20 and a grating layer 30 .

Specifically, as shown in FIGS. 1 to 4 , the main body 10 is formed as a rectangular plate body, and one top corner of the light guide plate 100 is recessed toward the center of the main body 10 to form an arc-shaped light incident surface 23 , and the main body 10 is adjacent to the light incident surface 23 The two sides of the light-emitting surface 24 are respectively formed, and the main body 10 also includes two oppositely arranged upper and lower surfaces. The first fixing member 20 is formed into an arc-shaped elongated strip with the same radian as the arc-shaped light-incident surface 23. One side of the component 20 is connected to the light incident surface 23, the first fixing component 20 is provided with a first placement groove 21 for placing the light source, and the grating layer 30 is provided on the upper surface to convert the oblique light emitted from the main body 10 into vertical The light emanating from the surface of the body 10 and radiating sideways.

In other words, the light guide plate 100 is mainly composed of the main body 10 , the first fixing member 20 and the grating layer 30 , wherein the main body 10 can be formed as a rectangular plate body, and one top corner of the main body 10 is concave toward the interior of the main body 10 to form an arc-shaped light incident Surface 23, two light-emitting surfaces 24 are formed on both sides of the light-incident surface 23, the first fixing member 20 is roughly formed in a crescent shape, and the curvature of both sides of the first fixing member 20 is equal to the curvature of the light-emitting surface 24. Fixed on one side of the light incident surface 23, the first fixing member 20 can be connected with the light incident surface 23 through glue or the like, the first fixing member 20 is provided with a first placement slot 21, and the light source can be placed in the first placement slot 21. , the structure is simple, easy to install and disassemble, the incident light beam emitted by the light source enters the main body 10 through the light incident surface 23 of the main body 10 and is refracted to the two light outgoing surfaces 24, forming a uniform pattern on the cross section of the main body 10 parallel to the light outgoing surfaces 24 Therefore, under the same brightness effect, the number of light sources and the size of the light sources can be reduced, and the cost can be reduced. The grating layer 30 is arranged on one side of the main body 10, and the grating layer 30 is a metal grating layer. The oblique light emitted from 10 is converted into light perpendicular to the surface of the main body 10 and diverges laterally, so that the effect of a prism sheet can be achieved and the light output effect can be improved.

Therefore, according to the light guide plate 100 of the embodiment of the present invention, one side of the main body 10 is recessed inward to form the light incident surface 23 , the first fixing member 20 is connected to the light incident surface 23 of the main body 10 , and the light source is fixed on the first fixing member 20, the main body 10 is provided with a grating layer 30, the light guide plate 100 is not only easy to install and disassemble, but also can improve the light extraction effect, improve the picture quality and reduce the cost.

According to some specific embodiments of the present invention, the other side of the first fixing member 20 is provided with at least one first installation groove 22 , and the light guide plate 100 further includes a second fixing member 40 , and the second fixing member 40 is formed into an arc-shaped indentation. The smooth surface 23 is an arc-shaped strip with the same radian. The side of the second fixing member 40 facing the first fixing member 20 is provided with a first protrusion 42 which is matched with the first installation groove 22. The second fixing member 40 is provided with The second placement groove 41 .

That is to say, the other side of the first fixing member 20 may also be provided with a second fixing member 40, and the other side of the first fixing member 20 is provided with a first installation groove 22. As shown in FIG. 3, the second fixing member One side of the 40 is provided with a first protrusion 42, the first protrusion 42 cooperates with the first installation groove 22, the connection is firm, and it is easy to disassemble. The second fixing member 40 is provided with a second placing groove 41. The size of 41 and the first placement slot 21 can be equal or unequal. The user can choose to place the light source in the first placement slot 21 or the second placement slot 41 according to specific needs, so as to adjust the distance between the light source and the light incident surface 23. distance.

Further, at least one second installation slot is provided on the other side of the second fixing member 40, and the light guide plate 100 further includes a third fixing member 50 (the structure of the third fixing member 50 is similar to that of the second fixing member 40), The third fixing member 50 is formed as an arc-shaped strip with the same arc of the arc-shaped light incident surface 23 , and the side of the third fixing member 50 facing the second fixing member 40 is provided with a second protrusion matched with the second installation groove. The third fixing member 50 is provided with a third placing slot 51 .

It should be noted that the third fixing member 50 is detachably connected to the second fixing member 40, and the third placing slot 51 on the third fixing member 50 can also be used to place the light source, thereby providing users with more choices. When using the light guide plate 100, the user does not need to install additional fixing brackets to fix the light source.

Preferably, the first fixing member 20 and the body 10 are integrally formed, which is not only structurally stable, but also easy to process.

According to an embodiment of the present invention, the first placement slot 21 , the second placement slot 41 and the third placement slot 51 are respectively formed as rectangular slots, which are convenient for processing and fixing light sources (such as light emitting diodes).

According to an embodiment of the present invention, the sizes of the first fixing member 20 , the second fixing member 40 and the third fixing member 50 are respectively equal (not shown), which is convenient for processing.

Optionally, as shown in FIG. 2 , the size of the first fixing member 20 is larger than the size of the second fixing member 40 , and the size of the second fixing member 40 is larger than the size of the third fixing member 50 . That is to say, the sizes of the first fixing member 20 , the second fixing member 40 and the third fixing member 50 are reduced in sequence, which is convenient to be installed on the main body 10 and has a beautiful structure.

In an embodiment of the present invention, the light guide plate 100 further includes a rubber pad, which is arranged in the first placement groove 21 to fix the light source. The rubber pad can not only play a role of vibration reduction and fixation, but also play a role in isolating the light source. heat effect.

To sum up, according to the light guide plate 100 of the embodiment of the present invention, one side of the main body 10 is recessed inward to form an arc-shaped light incident surface 23 , the first fixing member 20 is connected to the light incident surface 23 of the main body 10 , and the light source is fixed on the first fixed surface 23 . On the component 20, the main body 10 is provided with a grating layer 30, the light guide plate 100 is not only easy to install and disassemble, but also can improve the light extraction effect, improve the picture quality and reduce the cost.

The backlight module according to the embodiment of the second aspect of the present invention includes the light guide plate 100, the light source and the reflection plate described in the above embodiments.

Specifically, the light source is installed in the first placement groove 21 , the second placement groove 41 or the third placement groove 51 , and the reflector is provided on the lower surface of the light guide plate 100 .

In other words, the light source is installed in the first placement slot 21, and the light source can be a point light source or a line light source. The light emitted by the light source passes through the light incident surface 23 of the main body 10, and the main body 10 receives part of the light emitted by the light source and emits it through the light exit surface 24. At the same time, The main body 10 will receive the light emitted by the light source and convert the point light source or line light source into surface light to the grating layer 30 on the main body 10. The grating layer 30 is a metal grating layer 30, and the grating layer 30 converts the oblique light into vertical light. The main body 10 emits light diffused from the surface direction to the side to improve the brightness of the viewing angle, thereby eliminating the need for a prism sheet and a diffuser sheet and improving the image quality of the backlight module. The reflector is arranged below the main body 10. The reflector is used to reflect the light of the camera reflector into the body 10 to improve the utilization rate of light. The reflector can also function as a backplane. The reflector is made of materials that do not project light. made.

Preferably, the backlight module further includes an installation frame, and the installation frame is arranged in the circumferential direction of the light guide plate 100 and the reflection plate to support and protect the light guide plate 100 and the reflection plate.

All in all, the backlight module according to the embodiment of the present invention has a simple structure, can improve the projection rate, improve the brightness of the viewing angle, and improve the picture quality.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (10)

1. a kind of light guide plate characterized by comprising

Ontology, the ontology are formed as rectangular panel body, central concave from an apex angle of the light guide plate to the ontology with shape Camber incidence surface, the ontology are respectively formed light-emitting surface adjacent to two sides of the incidence surface, and the ontology further includes two A upper and lower surfaces being oppositely arranged；

First fixing piece, first fixing piece are formed as arc strip identical with the arc incidence surface radian, and described The side of one fixing piece is connected with the incidence surface, and first fixing piece is equipped with the first placing groove for placing light source；

Grating layer, the grating layer, which is set, is converted to vertically described on the upper surface with the oblique light for being emitted the ontology Body surface face and to the light laterally dissipated.

2. light guide plate according to claim 1, which is characterized in that the other side of first fixing piece is equipped at least one First mounting groove, further includes:

Second fixing piece, second fixing piece are formed as arc strip identical with the incidence surface radian, and described second is solid Determine part and be equipped with the first protrusion matched with first mounting groove towards the side of first fixing piece, described second is fixed Part is equipped with the second placing groove.

3. light guide plate according to claim 2, which is characterized in that the other side of second fixing piece is equipped at least one Second mounting groove, further includes:

Third fixing piece, the third fixing piece are formed as arc strip identical with the incidence surface radian, and the third is solid Determine part and be equipped with the second protrusion matched with second mounting groove towards the side of second fixing piece, the third is fixed Part is equipped with third placing groove.

4. light guide plate according to claim 1, which is characterized in that first fixing piece is integrally formed with the ontology Part.

5. light guide plate according to claim 3, which is characterized in that first placing groove, second placing groove and institute It states third placing groove and is respectively formed as rectangular channel.

6. light guide plate according to claim 3, which is characterized in that first fixing piece, second fixing piece and institute The size difference for stating third fixing piece is equal.

7. light guide plate according to claim 3, which is characterized in that it is solid that the size of first fixing piece is greater than described second Determine the size of part, the size of second fixing piece is greater than the size of the third fixing piece.

8. light guide plate according to claim 1, which is characterized in that further include:

Rubber pad, the rubber pad are located in first placing groove with the fixation light source.

9. a kind of backlight module characterized by comprising

Light guide plate according to claim 1 to 8；

Light source, the light source are mounted in the first placing groove, the second placing groove or third placing groove；

Reflecting plate, the reflecting plate are located at the lower surface of the light guide plate.

10. backlight module according to claim 9, which is characterized in that further include:

Installing frame, the installing frame are located in the circumferential direction of the light guide plate and the reflecting plate to support the light guide plate and described Reflecting plate.