A light guide plate and a backlight module formed by the light guide plate

Abstract

The present invention provides a light guide plate and a backlight module formed by the light guide plate, wherein the light guide plate comprises: a body, the body is formed as a rectangular plate body, one vertex of the light guide plate is recessed toward the center of the body to form an arc-shaped light incident surface, two side surfaces of the body adjacent to the light incident surface respectively form light emitting surfaces, and the body further comprises two upper and lower surfaces arranged oppositely; a first fixing member, the first fixing member is formed as an arc-shaped strip with the same curvature as the arc-shaped light incident surface, 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 a light source; a grating layer, the grating layer is arranged on the upper surface to convert the oblique light emitted by the body into light that is perpendicular to the body surface and diverges laterally. The light guide plate according to the embodiment of the present invention is not only simple in structure and easy to install and disassemble, but also can improve the light emitting effect, improve the image quality, and reduce the cost.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal display, and in particular to a light guide plate and a backlight module formed by the light guide plate. Background Art

[0002] The backlight module is the light source provider for liquid crystal displays. As the application of liquid crystal displays becomes more and more extensive, people's requirements for the overall cost performance of the backlight module are also getting higher and higher. 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 a light-emitting diode) enters the light guide plate and is emitted through the light guide plate. Generally, the angle of diffusion of the light source on the light guide plate will become smaller, resulting in the formation of dark areas on the edges of the two sides of the light guide plate due to the inability of the light to effectively irradiate, thereby reducing the utilization rate of the light. In the prior art, the utilization rate of light is also usually increased by adding structures such as prisms, but prisms are easy to break and wear, and are not easy to install. In addition, the fixing of the light source is usually troublesome, and it is necessary to re-fix a specific light source mounting part near the light guide plate to install the light source. The structure is complex and the process is cumbersome. Once the light source is fixed, it is not convenient to adjust the distance between the light source and the light guide plate. The scope of use is limited, and it lacks versatility and flexibility. Summary of the invention

[0003] In view of this, the present invention provides a light guide plate, which can improve light output effect, enhance image quality and reduce cost.

[0004] The invention also provides a backlight assembly.

[0005] According to the first aspect of the present invention, the light guide plate comprises: a body, which is formed as a rectangular plate, a vertex angle of the light guide plate is recessed toward the center of the body to form an arc-shaped light incident surface, two side surfaces of the body adjacent to the light incident surface respectively form light emitting surfaces, and the body also comprises two oppositely arranged upper and lower surfaces; a first fixing member, which is formed as an arc-shaped strip with the same curvature as the arc-shaped light incident surface, 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 a light source; a grating layer, which is arranged on the upper surface to convert the oblique light emitted by the body into light that is perpendicular to the body surface and diverges laterally.

[0006] According to the light guide plate of the embodiment of the present invention, one side of the 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 body, the light source is fixed on the first fixing member, and a grating layer is provided on the body. The light guide plate not only has a simple structure and is easy to install and disassemble, but also can improve the light output effect, improve the image quality and reduce the cost.

[0007] The light guide plate according to the embodiment of the present invention may also have the following additional technical features.

[0008] According to one embodiment of the present invention, at least one first mounting groove is provided on the other side of the first fixing member, and further includes: a second fixing member, the second fixing member is formed into an arc-shaped long strip with the same curvature as the light incident surface, the second fixing member is provided with a first protrusion matching the first mounting groove on the side facing the first fixing member, and the second fixing member is provided with a second placement groove.

[0009] According to one embodiment of the present invention, at least one second mounting groove is provided on the other side of the second fixing member, and further includes: a third fixing member, the third fixing member is formed into an arc-shaped long strip with the same curvature as the light incident surface, the third fixing member is provided with a second protrusion matching the second mounting groove on the side facing the second fixing member, and the third fixing member is provided with a third placement groove.

[0010] According to an embodiment of the present invention, the first fixing member and the body are integrally formed.

[0011] 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.

[0012] 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.

[0013] According to an embodiment of the present invention, the size of the first fixing member is greater than that of the second fixing member, and the size of the second fixing member is greater than that of the third fixing member.

[0014] According to an embodiment of the present invention, the light guide plate further comprises: a rubber pad, and the rubber pad is arranged in the first placement groove to fix the light source.

[0015] According to the second aspect of the present invention, the backlight module comprises: the light guide plate according to the above embodiment; a light source installed in the first placement groove, the second placement groove or the third placement groove; and a reflective plate arranged on the lower surface of the light guide plate.

[0016] According to an embodiment of the present invention, the backlight module further comprises: a mounting frame, which is arranged in the circumferential direction of the light guide plate and the reflective plate to support the light guide plate and the reflective plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of a main body of a light guide plate according to an embodiment of the present invention;

[0018] Figure 2 is a structural schematic diagram of a light guide plate according to an embodiment of the present invention;

[0019] Figure 3 is another structural schematic diagram of a light guide plate according to an embodiment of the present invention;

[0020] Figure 4 Schematic diagram of the structure of the second fixing member of the light guide plate according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] Light guide plate 100 ; body 10 ; first fixing member 20 ; first placement groove 21 ; first installation groove 22 ; light incident surface 23 ; light exit surface 24 ; grating layer 30 ; second fixing member 40 ; first protrusion 42 ; second placement groove 41 ; third fixing member 50 ; third placement groove 51 . DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] First, the light guide plate 100 according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0027] The light guide plate 100 according to the first embodiment of the present invention includes a body 10 , a first fixing member 20 and a grating layer 30 .

[0028] Specifically, if Figures 1 to 4 As shown, the main body 10 is formed as a rectangular plate, a vertex angle 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 two side surfaces of the main body 10 adjacent to the light incident surface 23 respectively form light emitting surfaces 24. The main body 10 also includes two upper and lower surfaces that are arranged oppositely, and the first fixing member 20 is formed as an arc-shaped strip with the same curvature as the arc-shaped light incident surface 23. One side of the first fixing member 20 is connected to the light incident surface 23, and a first placement groove 21 for placing a light source is provided on the first fixing member 20. The grating layer 30 is arranged on the upper surface to convert the oblique light emitted by the main body 10 into light that is perpendicular to the surface of the main body 10 and diverges laterally.

[0029] In other words, the light guide plate 100 is mainly composed of a body 10, a first fixing member 20 and a grating layer 30, wherein the body 10 can be formed into a rectangular plate, a vertex of the body 10 is concave toward the inside of the 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 into a crescent shape, the curvature of the curvature of the two sides of the first fixing member 20 is equal to the curvature of the curvature of the light emitting surface 24, the first fixing member 20 is fixed on one side of the light incident surface 23, the first fixing member 20 can be connected to the light incident surface 23 by glue, etc., the first fixing member 20 is provided with a first placement groove 21, and the light source can be placed The first placement groove 21 has a simple structure and is easy to install and disassemble. The incident light beam emitted by the light source passes through the light incident surface 23 of the main body 10 and is incident into the main body 10 and refracted toward the two light emitting surfaces 24, forming a uniform light field distribution on the cross section of the main body 10 parallel to the light emitting surface 24, thereby reducing the number and size of light sources under the same brightness effect and reducing costs. The grating layer 30 is arranged on one side of the main body 10. The grating layer 30 is a metal grating layer. The grating layer 30 can convert the oblique light emitted by the main body 10 into light that is perpendicular to the surface of the main body 10 and diverges laterally, thereby playing the role of a prism and improving the light emission effect.

[0030] 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 a light incident surface 23, the first fixing member 20 is connected to the light incident surface 23 of the main body 10, the light source is fixed on the first fixing member 20, and a grating layer 30 is provided on the main body 10. The light guide plate 100 is not only easy to install and disassemble, but also can improve the light output effect, improve the image quality, and reduce the cost.

[0031] According to some specific embodiments of the present invention, at least one first mounting groove 22 is provided on the other side of the first fixing member 20, and the light guide plate 100 also includes a second fixing member 40, the second fixing member 40 is formed as an arc-shaped long strip with the same curvature as the arc-shaped light incident surface 23, and the second fixing member 40 is provided with a first protrusion 42 that cooperates with the first mounting groove 22 on the side facing the first fixing member 20, and a second placement groove 41 is provided on the second fixing member 40.

[0032] That is to say, the second fixing member 40 may be further provided on the other side of the first fixing member 20, and the first mounting groove 22 may be provided on the other side of the first fixing member 20. Figure 3 As shown, a first protrusion 42 is provided on one side of the second fixing member 40, and the first protrusion 42 cooperates with the first mounting groove 22 to be firmly connected and easy to disassemble. A second placement groove 41 is provided on the second fixing member 40, and the size of the second placement groove 41 and the first placement groove 21 can be equal or unequal. The user can choose to place the light source in the first placement groove 21 or the second placement groove 41 according to specific needs, thereby adjusting the distance between the light source and the light incident surface 23.

[0033] Furthermore, at least one second mounting groove is provided on the other side of the second fixing member 40, and the light guide plate 100 also includes a third fixing member 50 (the structure of the third fixing member 50 is similar to that of the second fixing member 40), and the third fixing member 50 is formed as an arc-shaped long strip with the same arc as the arc-shaped light incident surface 23. The third fixing member 50 is provided with a second protrusion matching the second mounting groove on the side facing the second fixing member 40, and a third placement groove 51 is provided on the third fixing member 50.

[0034] It should be noted that the third fixing member 50 is detachably connected to the second fixing member 40, and the third placement groove 51 on the third fixing member 50 can also be used to place the light source, thereby providing more options for users. When using the light guide plate 100, the user does not need to install an additional fixing bracket to fix the light source.

[0035] Preferably, the first fixing member 20 and the main body 10 are an integrally formed member, which is not only structurally stable but also easy to process.

[0036] According to an embodiment of the present invention, the first placement groove 21 , the second placement groove 41 and the third placement groove 51 are respectively formed as rectangular grooves, which are convenient for processing and fixing light sources (such as light emitting diodes).

[0037] 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) to facilitate processing.

[0038] Alternatively, if Figure 2As shown, the size of the first fixing member 20 is larger than that of the second fixing member 40, and the size of the second fixing member 40 is larger than that of the third fixing member 50. In other words, 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 for installation on the body 10 and has a beautiful structure.

[0039] In one 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 in vibration reduction and fixing, but also play a role in heat insulation.

[0040] In summary, 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, the light source is fixed on the first fixing member 20, and a grating layer 30 is provided on the main body 10. The light guide plate 100 is not only easy to install and disassemble, but also can improve the light output effect, improve the image quality, and reduce the cost.

[0041] The backlight module according to the second embodiment of the present invention includes the light guide plate 100, a light source and a reflective plate as described in the above embodiment.

[0042] 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 reflection plate is disposed on the lower surface of the light guide plate 100 .

[0043] In other words, the light source is installed in the first placement groove 21. The light source can be a point light source or a line light source. The light source emits light through the light incident surface 23 of the main body 10. The main body 10 receives part of the light emitted by the light source and emits it through the light exiting surface 24. At the same time, the main body 10 receives the light emitted by the light source and converts the point light source or the line light source into surface light and emits it to the grating layer 30 on the main body 10. The grating layer 30 is a metal grating layer 30. The grating layer 30 then converts the oblique light into light that is perpendicular to the surface direction of the main body 10 and diverges laterally and emits it, thereby increasing the brightness of the viewing angle. Therefore, the prism and the diffuser can be omitted, and the image quality of the backlight module is improved. The reflector is arranged below the main body 10. The reflector is used to reflect the light of the camera reflector into the main body 10 to improve the utilization rate of light. The reflector can also serve as a backplane. The reflector is made of a material that does not project light.

[0044] Preferably, the backlight module further includes a mounting frame, which is disposed on the circumference of the light guide plate 100 and the reflective plate to support and protect the light guide plate 100 and the reflective plate.

[0045] In summary, the backlight module according to the embodiment of the present invention has a simple structure, can improve the projection rate, increase the brightness of the viewing angle, and improve the image quality.

[0046] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A light guide plate, characterized in that: include: A body, wherein the body is formed as a rectangular plate, a vertex of the light guide plate is recessed toward the center of the body to form an arc-shaped light incident surface, two side surfaces of the body adjacent to the light incident surface respectively form light emitting surfaces, and the body further comprises an upper surface and a lower surface arranged opposite to each other; a first fixing member, the first fixing member is formed into an arc-shaped strip with the same arc as the arc-shaped light incident surface, 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; A grating layer, the grating layer being arranged on the upper surface to convert the oblique light emitted from the body into light which is perpendicular to the surface of the body and diverges laterally; The other side of the first fixing member is provided with at least one first mounting groove, and further comprises: A second fixing member, the second fixing member is formed into an arc-shaped strip with the same arc as the light incident surface, a first protrusion matching with the first mounting groove is provided on the side of the second fixing member facing the first fixing member, and a second placement groove is provided on the second fixing member; The other side of the second fixing member is provided with at least one second mounting groove, and further comprises: a third fixing member, the third fixing member being formed into an arc-shaped strip with the same arc as the light incident surface, a second protrusion matching with the second mounting groove being provided on a side of the third fixing member facing the second fixing member, and a third placement groove being provided on the third fixing member; The first fixing member and the main body are integrally formed.

2. The light guide plate according to claim 1, characterized in that: The first placement groove, the second placement groove and the third placement groove are respectively formed as rectangular grooves.

3. The light guide plate according to claim 1, characterized in that: The sizes of the first fixing member, the second fixing member and the third fixing member are respectively equal.

4. The light guide plate according to claim 1, characterized in that: The size of the first fixing member is larger than that of the second fixing member, and the size of the second fixing member is larger than that of the third fixing member.

5. The light guide plate according to claim 1, characterized in that: Also includes: A rubber pad is arranged in the first placement groove to fix the light source.

6. A backlight module, characterized in that: include: The light guide plate according to any one of claims 1 to 5; A light source, wherein the light source is installed in the first placement slot, the second placement slot or the third placement slot; A reflective plate is arranged on the lower surface of the light guide plate.

7. The backlight module according to claim 6, characterized in that: Also includes: A mounting frame is provided on the circumference of the light guide plate and the reflective plate to support the light guide plate and the reflective plate.

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