CN113311529B - Light guide plate and backlight module - Google Patents
Light guide plate and backlight module Download PDFInfo
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- CN113311529B CN113311529B CN202110491456.2A CN202110491456A CN113311529B CN 113311529 B CN113311529 B CN 113311529B CN 202110491456 A CN202110491456 A CN 202110491456A CN 113311529 B CN113311529 B CN 113311529B
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- light guide
- blind hole
- guide plate
- edge
- side edge
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a light guide plate and a backlight module, wherein the light guide plate comprises an upper side edge, a lower side edge, a left side edge, a right side edge, a first light guide area, a second light guide area and a blind hole; the blind hole is close to the upper side edge; the second light guide region is positioned between the blind hole and the upper side; the thickness of the first light guide area is consistent and equal to the depth of the blind hole, and the thickness of the second light guide area is uniformly increased along a first direction. The light guide plate can solve the problem that the area between the blind hole in the light guide plate and the edge of the light guide plate is easy to crack.
Description
Technical Field
The invention relates to the technical field of display, in particular to a light guide plate and a backlight module.
Background
In recent years, with the development of technology, display devices are increasingly required to have a high screen ratio display effect. In order to further improve the screen occupation ratio of the display device, a backlight module with structures of Liu Haibing, a water drop screen and the like is provided, so that the frame width is reduced, and the screen occupation ratio is improved.
However, in the structure that the blind holes are arranged in the backlight module to accommodate functional devices such as a camera to improve the screen ratio, the blind holes in the light guide plate have a certain distance from the edge of the light guide plate, and the distance is required to be as small as possible.
Therefore, how to avoid the phenomenon that the area between the blind hole and the edge of the light guide plate is easy to crack is a problem to be solved.
Disclosure of Invention
The invention aims to provide a light guide plate and a backlight module, which can effectively solve the problem that the area between a blind hole in the light guide plate and the edge of the light guide plate is easy to crack.
In order to achieve the above object, the present invention provides a light guide plate, which comprises an upper side, a lower side, a left side, a right side, a first light guide region, a second light guide region and a blind hole; the blind hole is close to the upper side edge; the second light guide region is positioned between the blind hole and the upper side; the thickness of the first light guide area is consistent and equal to the depth of the blind hole, and the thickness of the second light guide area is uniformly increased along a first direction.
The light guide plate is characterized in that the blind hole is located in the middle between the left side and the right side, the second light guide area is provided with a first side and a second side, two ends of the first side are respectively located at the edge of the blind hole and the upper side, and two ends of the second side are respectively located at the edge of the blind hole and the upper side.
In the above light guide plate, the first side edge and the second side edge are linear.
In the above light guide plate, an included angle between the first side edge and a second direction is between 0 degree and 60 degrees, an included angle between the second side edge and the second direction is between 120 degrees and 180 degrees, and the second direction is perpendicular to the first direction.
In the light guide plate, the blind hole is close to the left side, the second light guide area is provided with a first side and a second side, two ends of the first side are respectively located at the edge of the blind hole and the upper side, and two ends of the second side are respectively located at the edge of the blind hole and the left side.
In the above light guide plate, the first side edge and the second side edge are linear.
In the above light guide plate, an included angle between the first side edge and a second direction is between 0 degree and 45 degrees, an included angle between the second side edge and the second direction is between 170 degrees and 225 degrees, and the second direction is perpendicular to the first direction.
The blind hole is close to the right side edge, the second light guide area is provided with a first side edge and a second side edge, two ends of the first side edge are respectively located at the edge of the blind hole and the right side edge, and two ends of the second side edge are respectively located at the edge of the blind hole and the upper side edge.
In the above light guide plate, the first side edge and the second side edge are arc-shaped.
The light guide plate is characterized in that the blind hole is located in the middle between the left side and the right side, the second light guide area is provided with a first side and a second side, two ends of the first side are respectively located at the edge of the blind hole and the right side, and two ends of the second side are respectively located at the edge of the blind hole and the left side.
In the above light guide plate, the first side edge and the second side edge are linear and parallel to a second direction, and the second direction is perpendicular to the first direction.
In order to achieve the above object, the present invention further provides a backlight module, which includes a frame and the above light guide plate, wherein the light guide plate is disposed in the frame, the frame includes a first receiving area corresponding to the first light guide area and a second receiving area corresponding to the second light guide area, the depths of the first receiving areas are consistent, and the depths of the second receiving areas are uniformly increased along the first direction.
In summary, the second light guide region of the light guide plate is configured as a wedge-shaped structure, that is, the thickness of the light guide plate of the second light guide region is uniformly increased along the first direction, so that the structural strength of the second light guide region of the light guide plate can be increased, and the problem that the region between the blind hole in the light guide plate and the edge of the light guide plate is easily broken is solved.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1A is a schematic plan view illustrating a backlight module according to a first embodiment of the invention.
FIG. 1B is an enlarged view of the second light guiding region shown in FIG. 1A.
Fig. 2 is a schematic cross-sectional view of the backlight module shown in fig. 1A.
Fig. 2A is a schematic structural view of the light guide plate in fig. 2.
Fig. 2B is a schematic structural diagram of the frame in fig. 2.
Fig. 3A is a schematic plan view illustrating a backlight module according to a second embodiment of the invention.
FIG. 3B is an enlarged view of the second light guiding region in FIG. 3A.
Fig. 4 is a schematic plan view illustrating a backlight module according to a third embodiment of the invention.
Fig. 5A is a schematic plan view illustrating a backlight module according to a fourth embodiment of the invention.
FIG. 5B is an enlarged view of the second light guiding region in FIG. 5A.
Fig. 6 is a schematic plan view illustrating a backlight module according to a fifth embodiment of the invention.
Wherein, the reference numbers:
100: backlight module
10: upper side edge
20: lower side edge
30: left side edge
40: right side edge
50: blind hole
60: the first light guide region
61: a first top surface
62: first bottom surface
70: second light guide region
71: the first side edge
72: second side edge
73: second top surface
74: second bottom surface
80: frame structure
Y: a first direction
X: second direction
α 1: first included angle
α 2: second included angle
Detailed Description
The following detailed description of the embodiments of the present invention with reference to the drawings and specific examples is provided for further understanding the objects, aspects and effects of the present invention, but not for limiting the scope of the appended claims.
Where certain terms are used in the specification and following claims to refer to particular components or features, those skilled in the art will understand that various terms or numbers may be used by a skilled user or manufacturer to refer to the same component or feature. This specification and the claims that follow do not intend to distinguish between components or features that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to.
It should be noted that in the description of the present invention, the terms "transverse direction", "longitudinal direction", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and "about", or "approximately", "substantially", "left" and "right", etc. indicate orientations or positional relationships or parameters, etc., which are based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, a specific size or be constructed and operated in a specific orientation, and thus, are not to be understood as limiting the present invention.
FIG. 1A is a schematic plan view illustrating a backlight module according to a first embodiment of the present invention; FIG. 1B is an enlarged view of the second light guide region in FIG. 1A; FIG. 2 is a schematic cross-sectional view of the backlight module shown in FIG. 1A; FIG. 2A is a schematic view of the light guide plate shown in FIG. 2; fig. 2B is a schematic structural diagram of the frame in fig. 2.
Referring to fig. 1A, a backlight module 100 according to the present invention includes a light guide plate and a frame 80. The light guide plate includes an upper side 10, a lower side 20, a left side 30, a right side 40, a blind hole 50, a first light guide region 60 and a second light guide region 70, wherein the first light guide region 60 and the second light guide region 70 are formed by surrounding the upper side 10, the lower side 20, the left side 30 and the right side 40, and the second light guide region 70 is located between the blind hole 50 and the upper side 10. Referring to fig. 1B, specifically, in the present embodiment, the blind hole 50 is close to the upper side 10 and is located at the middle position between the left side 30 and the right side 40, the second light guiding region 70 may include a first side 71 and a second side 72, and the first side 71 and the second side 72 are linear, wherein two ends of the first side 71 are located on the edge of the blind hole 50 and the right side 40, respectively, and two ends of the second side 72 are located on the edge of the blind hole 50 and the left side 30, respectively; further, the first side edge 71 and the second side edge 72 may be respectively parallel to a second direction X, the second direction X may be, for example, a horizontal direction, and the second direction X is perpendicular to the first direction Y, that is, the second light guiding region 70 is a region surrounded by the first side edge 71, the second side edge 72, the upper side edge 10, and a portion of the left side edge 30 and a portion of the right side edge 40 close to the upper side edge 10. Referring to fig. 2, fig. 2A and fig. 2B, the light guide plate is disposed in the frame 80, and the thickness d1 of the light guide plate in the first light guide region 60 is uniform along the first direction Y and equal to the depth d3 of the blind hole 50, i.e., d1= d3; the thickness d2 of the light guide plate in the second light guide region 70 is uniformly increased along the first direction Y, and the initial thickness is equal to the thickness d3 of the blind hole 50, that is, the thickness d2 of the light guide plate in the second light guide region gradually and uniformly increases from the position close to the blind hole 50 to the position away from the blind hole 50; specifically, the first light guide region 60 includes a first top surface 61 and a first bottom surface 62, the first top surface 61 and the first bottom surface 62 are parallel to each other, the second light guide region 70 includes a second top surface 73 and a second bottom surface 74, wherein the second top surface 73 and the first top surface 61 are flush with each other, and the second bottom surface 74 is an inclined surface relative to the second top surface 73, so that the light guide plate is in a wedge-shaped structure in the second light guide region 70. Corresponding to the blind hole 50, the first light guide region 60 and the second light guide region 70 of the light guide plate, the frame 80 includes a first receiving region 81, a second receiving region 82 and a hole region 83, wherein the first receiving region 81 corresponds to the first light guide region 60 of the light guide plate, so that the depth of the first receiving region 81 is uniform and consistent, the second receiving region 82 corresponds to the second light guide region 70, so that the depth of the second receiving region 82 is uniformly increased along the first direction Y, and the hole region 83 corresponds to the blind hole 50, and the depth thereof can be equal to the depth of the first receiving region 81.
FIG. 3A is a schematic plan view illustrating a backlight module according to a second embodiment of the present invention; FIG. 3B is an enlarged schematic view of the second light guiding region in FIG. 3A.
The backlight module 100 of the embodiment shown in fig. 3A and 3B is the same as the backlight module 100 of the embodiment shown in fig. 1A and 1B, and the difference therebetween is that: referring to fig. 3A and 3B, in the present embodiment, the second light guiding region 70 of the light guiding plate includes a first side edge 71 and a second side edge 72, wherein two ends of the first side edge 71 are respectively located at the edge of the blind hole 50 and the upper side edge 10, and two ends of the second side edge 72 are respectively located at the edge of the blind hole 50 and the upper side edge 10, that is, the second light guiding region 70 is a region surrounded by the first side edge 71, the second side edge 72 and a part of the upper side edge 10; specifically, a first included angle α 1 is formed between the first side edge 71 and the second direction X, a second included angle α 2 is formed between the second side edge 72 and the second direction X, the first included angle α 1 is between 0 degree and 60 degrees, and the second included angle α 2 is between 120 degrees and 180 degrees.
Fig. 4 is a schematic plan view illustrating a backlight module according to a third embodiment of the invention.
The backlight module 100 of the embodiment shown in fig. 4 is the same as the backlight module 100 of the embodiment shown in fig. 3A and 3B, and the description thereof is not repeated here, and the difference therebetween is: referring to fig. 4, in the present embodiment, a first side edge 71 and a second side edge 72 of a second light guide region 70 of the light guide plate are arc-shaped.
Fig. 5A is a schematic plan view of a backlight module according to a fourth embodiment of the invention, and fig. 5B is an enlarged schematic view of a second light guide region in fig. 5A.
The backlight module 100 of the embodiment shown in fig. 5A and 5B is the same as the backlight module 100 of the embodiment shown in fig. 3A and 3B, and the description thereof is not repeated here, and the difference therebetween is: referring to fig. 5A and 5B, in the present embodiment, the blind hole 50 is close to the left side 30, and the second light guiding region 70 includes a first side 71 and a second side 72, wherein two ends of the first side 71 are respectively located at the edge of the blind hole 50 and the upper side 10, and two ends of the second side 72 are respectively located at the edge of the blind hole 50 and the left side 30, that is, the second light guiding region 70 is a region surrounded by the first side 71, the second side 72, a part of the upper side 10 close to the left side 30, and a part of the left side 30 close to the upper side 10; specifically, a first included angle α 1 is formed between the first side edge 71 and the second direction X, a second included angle α 2 is formed between the second side edge 72 and the second direction X, the first included angle α 1 is between 0 degree and 45 degrees, and the second included angle α 2 is between 170 degrees and 225 degrees.
Fig. 6 is a schematic plan view illustrating a backlight module according to a fifth embodiment of the invention.
The backlight module 100 of the embodiment shown in fig. 6 is the same as the backlight module 100 of the embodiment shown in fig. 5A and 5B, and the description thereof is not repeated here, and the difference therebetween is that: referring to fig. 6, in the present embodiment, a first side edge 71 and a second side edge 72 of a second light guide region 70 of the light guide plate are arc-shaped.
In addition, it should be noted that: the position of the blind hole 50 on the light guide plate in the above embodiments is only an example, for example, the blind hole 50 is located near the left side 30 and in the middle between the left side 30 and the right side 40, but the present invention is not limited thereto, and in other embodiments, the position of the blind hole 50 may also be located near the right side 40, and it should be understood by those skilled in the art that the position of the blind hole 50 near the right side 40 and the position of the blind hole 50 near the left side 30 may be axisymmetric with respect to a central axis (as shown in fig. 5B) between the left side 30 and the right side 40, and therefore it can also be understood that the second light guiding region 70 of the blind hole 50 near the right side 40 and the second region 70 of the blind hole 50 near the left side 30 are axisymmetric with respect to the central axis. When the blind hole 50 is located near the right side 40, the second light guiding region 70 may also include a first side 71 and a second side 72, two ends of the first side 71 are located at the edge of the blind hole 50 and the right side 40, respectively, and two ends of the second side 72 are located at the edge of the blind hole 50 and the upper side 10, respectively, that is, the second light guiding region 70 is an area surrounded by the first side 71, the second side 72, the part of the upper side 10 near the right side 40 and the part of the right side 40 near the upper side 10. Specifically, a first included angle α 1 is formed between the first side edge 71 and the second direction X, a second included angle α 2 is formed between the second side edge 72 and the second direction X, the first included angle α 1 is between-45 degrees and 10 degrees, and the second included angle α 2 is between 135 degrees and 180 degrees. The shapes of the first side edge 71 and the second side edge 72 are, for example, linear or arc, which is not limited in the present invention.
In summary, the light guide plate is configured to have a wedge-shaped structure at the portion of the second light guide region 70, that is, the thickness d2 of the light guide plate in the second light guide region 70 is uniformly increased along the first direction Y, so that the structural strength of the light guide plate in the second light guide region 70 can be increased, and the problem that the region between the blind hole 50 in the light guide plate and the upper side 10 of the light guide plate is easily broken is solved.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A light guide plate is characterized by comprising an upper side edge, a lower side edge, a left side edge, a right side edge, a first light guide area, a second light guide area and a blind hole; the blind hole is close to the upper side edge; the second light guide area is positioned between the blind hole and the upper side edge; the thickness of the first light guide area is consistent and equal to the depth of the blind hole, and the thickness of the second light guide area is uniformly increased along a first direction so as to increase the structural strength of the second light guide area and avoid cracking.
2. The light guide plate according to claim 1, wherein the blind hole is located at a middle position between the left side and the right side, the second light guide region has a first side and a second side, two ends of the first side are respectively located at an edge of the blind hole and the upper side, and two ends of the second side are respectively located at an edge of the blind hole and the upper side.
3. The light guide plate as claimed in claim 2, wherein the first side and the second side are linear.
4. The light guide plate according to claim 3, wherein the first side edge forms an angle of 0 to 60 degrees with a second direction, the second side edge forms an angle of 120 to 180 degrees with the second direction, and the second direction is perpendicular to the first direction.
5. The light guide plate according to claim 1, wherein the blind hole is near the left side, the second light guide region has a first side and a second side, two ends of the first side are respectively located at the edge of the blind hole and the upper side, and two ends of the second side are respectively located at the edge of the blind hole and the left side.
6. The light guide plate according to claim 5, wherein the first side and the second side are linear.
7. The light guide plate as claimed in claim 6, wherein the angle between the first side edge and a second direction is between 0 degree and 45 degrees, the angle between the second side edge and the second direction is between 170 degrees and 225 degrees, and the second direction is perpendicular to the first direction.
8. The light guide plate according to claim 1, wherein the blind hole is adjacent to the right side, the second light guiding region has a first side and a second side, two ends of the first side are respectively located at the edge of the blind hole and the right side, and two ends of the second side are respectively located at the edge of the blind hole and the upper side.
9. The light guide plate according to claim 8, wherein the first side and the second side are linear.
10. The light guide plate as claimed in claim 9, wherein the angle between the first side edge and a second direction is between-45 degrees and 10 degrees, the angle between the second side edge and the second direction is between 135 degrees and 180 degrees, and the second direction is perpendicular to the first direction.
11. The light guide plate according to claim 2, 5 or 8, wherein the first side edge and the second side edge are curved.
12. The light guide plate according to claim 1, wherein the blind hole is located at a middle position between the left side and the right side, the second light guide region has a first side and a second side, two ends of the first side are respectively located at an edge of the blind hole and the right side, and two ends of the second side are respectively located at an edge of the blind hole and the left side.
13. The light guide plate as claimed in claim 12, wherein the first side and the second side are linear and parallel to a second direction perpendicular to the first direction.
14. A backlight module comprising a frame and the light guide plate according to any one of claims 1 to 13, wherein the light guide plate is disposed in the frame, the frame comprises a first receiving area corresponding to the first light guide area and a second receiving area corresponding to the second light guide area, the first receiving areas have the same depth, and the depth of the second receiving areas increases uniformly along the first direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110491456.2A CN113311529B (en) | 2021-05-06 | 2021-05-06 | Light guide plate and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110491456.2A CN113311529B (en) | 2021-05-06 | 2021-05-06 | Light guide plate and backlight module |
Publications (2)
| Publication Number | Publication Date |
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| CN113311529A CN113311529A (en) | 2021-08-27 |
| CN113311529B true CN113311529B (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110491456.2A Active CN113311529B (en) | 2021-05-06 | 2021-05-06 | Light guide plate and backlight module |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002042535A (en) * | 2000-07-05 | 2002-02-08 | Internatl Business Mach Corp <Ibm> | Display device and surface light source device |
| CN108957848B (en) * | 2018-07-02 | 2021-04-23 | Oppo广东移动通信有限公司 | Screen assembly and electronic device |
| CN109613752B (en) * | 2018-12-18 | 2021-07-16 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN209946442U (en) * | 2019-06-21 | 2020-01-14 | 深圳市隆利科技股份有限公司 | Light guide plate with notch at through hole, backlight module and display device |
| CN111665590A (en) * | 2020-06-28 | 2020-09-15 | 武汉华星光电技术有限公司 | Light guide plate and backlight module |
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| CN113311529A (en) | 2021-08-27 |
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