CN214375379U - Light guide plate structure, backlight module and display device - Google Patents
Light guide plate structure, backlight module and display device Download PDFInfo
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- CN214375379U CN214375379U CN202120662498.3U CN202120662498U CN214375379U CN 214375379 U CN214375379 U CN 214375379U CN 202120662498 U CN202120662498 U CN 202120662498U CN 214375379 U CN214375379 U CN 214375379U
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Abstract
The utility model relates to the technical field of liquid crystal display, in particular to a light guide plate structure, a backlight module and a display device, wherein the heat dissipation structure comprises a light guide plate body which is provided with a light incoming surface and a light outgoing surface which are opposite, wherein the light incoming surface is arranged towards a backlight source and is provided with a groove matched with the shape of the backlight source; the first microstructures are formed on the bottom wall surface of the groove, are arranged opposite to the backlight source and are used for diffusing the light-emitting angle of the backlight source; and the second microstructures are formed on the bottom wall surface of the groove and are opposite to the blank area between the two adjacent backlight sources, and the second microstructures are inwards recessed towards the direction far away from the backlight sources so as to increase the reflection and refraction of the light rays emitted by the backlight sources. Through the setting of recess, solved the problem of backlight unit light leak, through the luminous angle of first micro-structure increase, avoided the light leak phenomenon to through the setting of second micro-structure, reuse light energy reaches the purpose that improves light energy utilization.
Description
Technical Field
The utility model relates to a liquid crystal display technology field especially relates to a light guide plate structure, backlight unit and display device.
Background
The light guide plate (light guide plate) is made of optical acrylic/PC plate, and then high-tech material with high refractive index and no light absorption is used to print light guide points on the bottom surface of the optical acrylic plate by laser engraving, V-shaped cross grid engraving and UV screen printing technology. The optical-grade acrylic sheet is used for absorbing the light emitted from the lamp to stay on the surface of the optical-grade acrylic sheet, when the light irradiates each light guide point, the reflected light can be diffused towards each angle, and then the reflected light is damaged and is emitted from the front surface of the light guide plate. The light guide plate can uniformly emit light through various light guide points with different densities and sizes.
The light guide plate is an important part in the backlight module, and light emitted by a light source in the backlight module enters the display screen after passing through the light guide plate, so that the display screen realizes a display function. As shown in fig. 1, in a conventional liquid crystal display module, as shown in fig. 1 and 2, when an LED light bar is collocated with an acrylic light guide plate and is converted from a point light source to a surface light source, the light leakage phenomenon of uneven brightness is generated on the light incident side of the light guide plate due to insufficient light emitting angle of the LED light bar and insufficient light mixing distance of the collocated light guide plate, so that the utilization rate of the light source is reduced, and the display effect of the display device is affected. In order to improve the light leakage phenomenon at the light incident side, a black electronic material is usually attached to the light incident side, which increases the material cost and the manufacturing cost, and also causes the problem of poor consistency of the finished product.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem of the utilization ratio of light source that the mixed light distance of the luminous angle of the light guide plate and light guide plate among the prior art is not enough to lead to appearing the light leak phenomenon, and the light guide plate structure that a light source emission angle increase, light source utilization ratio improve, backlight unit and the display device that have this light guide plate structure that provide.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
an object of the utility model is to provide a light guide plate structure, include:
the light guide plate body is provided with a light incident surface and a light emergent surface which are opposite, wherein the light incident surface faces the backlight source and is provided with a groove matched with the shape of the backlight source;
the first microstructures are formed on the bottom wall surface of the groove, are arranged opposite to the backlight source and are used for diffusing the light-emitting angle of the backlight source;
the second microstructures are formed on the bottom wall surface of the groove and are opposite to the blank area between two adjacent backlight sources, and the second microstructures are inwards recessed towards the direction far away from the backlight sources so as to increase the reflection and refraction of light rays emitted by the backlight sources.
Optionally, the first microstructure includes a plurality of side-by-side microstructures recessed toward a direction away from the backlight source, and any one of the microstructures has an arc surface or a trapezoidal surface.
Optionally, in the light guide plate structure, a circle center corresponding to the arc surface of the first microstructure is located on one side of the light incident surface or on one side of the light emergent surface.
Optionally, in the light guide plate structure, the end points of any two adjacent arc surfaces of the first microstructure, which are close to each other, are connected; the outer end points of any two adjacent trapezoidal surfaces of the first microstructure are connected.
Optionally, in the light guide plate structure, the end points of any two adjacent arc surfaces of the first microstructure, which are close to each other, are connected through a horizontal section; the outer end points of any two adjacent trapezoidal surfaces of the first microstructure are connected through a horizontal section.
Optionally, the first microstructures and the second microstructures each include at least two, and at least two of the first microstructures and at least two of the second microstructures are alternately arranged.
Optionally, in the light guide plate structure, the length of all the microstructures of any first microstructure is L1, and the length of the backlight source corresponding to the first microstructure is L2, where L1 is greater than L2;
the second microstructure is a triangular structure, the opening width of the bottom edge of the triangular structure is L3, the height of the triangular structure is H, H is L3 and is 1.5-2 times of L2.
Optionally, in the light guide plate structure, an apex angle θ of the triangular structure ranges from 105 ° to 145 °.
Another object of the present invention is to provide a backlight module, which includes the light guide plate structure and the orientation of any one of the above-mentioned light guide plate.
Still another object of the present invention is to provide a liquid crystal display device, which comprises a display screen and a backlight module.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses a light guide plate structure, setting through the recess, the background is solved the problem of the backlight unit light leak that the luminous angle restriction of prior art light guide plate structure leads to, through the luminous angle of first microstructure increase, make emission angle also to incline towards the backlight direction backward, thereby make dull light zone be in by the blank area between two adjacent backlights and by the sunken zone that the second microstructure formed enclose synthetic regional in, the light leak phenomenon that the light zone and dull light zone cross phenomenon lead to has also been formed to the income light side among the prior art, thereby neglected the mixed light distance, and through the setting of second microstructure, make light form multiple emission and refraction in this microstructure, reuse light energy, reach the purpose that improves light energy utilization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a light guide plate structure before being modified and a backlight source;
FIG. 2 is a schematic diagram of the principle structure of the light guide plate structure before being modified and the backlight source;
fig. 3 is a schematic structural view of the light guide plate structure and the backlight source according to embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a light guide plate structure according to embodiment 1 of the present invention
Fig. 5 is a schematic view of a principle structure of the light guide plate structure and the backlight source according to embodiment 1 of the present invention;
fig. 6 is a schematic partial enlarged structural view of a first microstructure of a first form of a light guide plate structure according to embodiment 1 of the present invention;
fig. 7 is a schematic structural diagram of a first microstructure of a second form of a light guide plate structure according to embodiment 1 of the present invention;
fig. 8 is a schematic partial enlarged structural view of a first microstructure of a second form of a light guide plate structure according to embodiment 1 of the present invention;
fig. 9 is a schematic structural diagram of a first microstructure of a third form of a light guide plate structure according to embodiment 1 of the present invention;
fig. 10 is a schematic partial enlarged structural view of a first microstructure of a third form of a light guide plate structure according to embodiment 1 of the present invention;
fig. 11 is a schematic structural diagram of a first microstructure of a fourth form of a light guide plate structure according to embodiment 1 of the present invention;
fig. 12 is a schematic partial enlarged structural view of a first microstructure of a fourth form of a light guide plate structure according to embodiment 1 of the present invention.
Description of reference numerals:
1. a light guide plate body; 10. a groove; 11. a first microstructure; 12. a second microstructure; 2. a backlight source; 3. no light region.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in fig. 3 to 12, a light guide plate structure of the present embodiment includes a light guide plate body 1, at least one first microstructure 11, and at least one second microstructure 12. The light guide plate body 1 has a light incident surface and a light emitting surface opposite to each other, wherein the light incident surface faces the backlight 2 and is formed with a groove 10 having a shape matching with that of the backlight 2. At least one first microstructure 11 is formed on the bottom wall surface of the groove 10, is arranged opposite to the backlight source 2, and is used for diffusing the light emitting angle of the backlight source 2. At least one second microstructure 12 is formed on the bottom wall surface of the groove 10 and is opposite to the blank area between two adjacent backlight sources 2, and the second microstructure 12 is recessed inwards towards the direction far away from the backlight sources 2 so as to increase the reflection and refraction of the light rays emitted by the backlight sources 2. Through the arrangement of the groove 10, the problem of backlight module light leakage caused by limitation of the light emitting angle of the light guide plate structure and insufficient light mixing distance in the prior art is solved, the light emitting angle is increased through the first microstructure 11, so that the emission angle is backward and also deviates towards the direction of the backlight source 2, and the no light area is in the area enclosed by the blank area between two adjacent backlight sources 2 and the concave area formed by the second microstructure 12, namely, the light leakage phenomenon caused by the crossing phenomenon of the light area and the no light area formed on the light incident side in the prior art is avoided, so that the light mixing distance is ignored, and through the arrangement of the second microstructure 12, light is emitted and refracted for multiple times in the microstructure, the light energy is recycled, and the purpose of improving the light energy utilization rate is achieved.
The groove 10 forming process of this embodiment is a mirror polishing process, and a groove 10 structure suitable for the appearance of the backlight 2 (in this embodiment, an LED light source) is processed. The problem of among the prior art through attached black electronic material lead to the relatively poor and increase material cost of finished product's uniformity is solved. Specifically, as shown in fig. 3, the backlight 2 has a convex appearance, and the groove 10 has a concave appearance.
With respect to the number of the first microstructures 11 and the second microstructures 12, preferably, as shown in fig. 4, each of the first microstructures 11 and the second microstructures 12 includes at least two and at least two are alternately arranged. As an alternative embodiment, the first microstructures 11 comprise at least two, while the second microstructures 12 comprise one and the second microstructure 12 is located between two first microstructures 11. As shown in fig. 4 and 5, the number of the backlights 2 corresponds to the number of the first microstructures 11.
More specifically, as shown in fig. 4 to 12, the first microstructure 11 is composed of a plurality of side-by-side microstructures recessed toward a direction away from the backlight 2, and any microstructure has a curved surface or a trapezoidal surface. More specifically, as shown in fig. 6, each microstructure is a recessed microstructure similar to a "u" shape and formed by enclosing two adjacent arc-shaped protrusions protruding toward the backlight 2, that is, protruding downward and arranged at intervals, and a horizontal section connecting end points of the two arc-shaped protrusions, and correspondingly, the center of the arc-shaped protrusion is located on one side of the backlight 2. As shown in fig. 8, each of the microstructures is a concave microstructure similar to an inverted "u" shape and formed by enclosing two arc-shaped protrusions protruding towards a direction away from the backlight 2, that is, protruding upwards and arranged at intervals, and a horizontal segment connecting end points of the two arc-shaped protrusions, and correspondingly, a circle center of each arc-shaped protrusion is located on a light-emitting surface, that is, one side of a display surface of the display screen. As shown in fig. 10 and 12, each microstructure is formed by enclosing trapezoidal structures with open bottom sides at intervals. Fig. 10 and 12 differ in that the outer end point of one oblique side of two adjacent ladder structures in fig. 10 is directly connected to the outer end point of one oblique side of the other ladder structure. The outer end point of one oblique side of two adjacent trapezoids and the outer end point of one oblique side of the other trapezoid in fig. 12 are connected through a horizontal segment. It should be noted that, in this embodiment, the depth and/or the width of the recess of any two adjacent arc-shaped protrusions may be the same or different. Similarly, the widths of the openings at the height and/or bottom edge of any two adjacent trapezoid structures may be the same or different, and will not be described in detail herein, and the design purpose of the microstructure is mainly to increase the light emitting angle of the backlight 2 at the light incident surface, so as to move the non-light area backwards to the blank area between the second microstructure 12 and the two adjacent backlight 2, so that the light incident surface of the light guide plate does not have the alternating phenomenon of the light area and the non-light area in the prior art, that is, the light leakage phenomenon does not occur.
As for the second microstructure 12, as shown in fig. 3 to 5, the second microstructure 12 is a triangular structure, and is aimed at enabling light emitted from the backlight source 2 of the light incident surface to be reflected and refracted for multiple times on two inclined surfaces of the triangular structure in the area, so as to realize light energy reuse and improve the utilization rate of the light energy.
Specifically, as shown in fig. 4 and 5, the length L1 of any first structure is greater than the length L2 of the backlight 2 corresponding to the first structure, that is, L1 > L2, and this design aims to enable light emitted by the backlight 2 to pass through the first microstructures 11 to achieve the purpose of increasing the light-emitting angle, and if L1 < L2, the light emitted by the backlight 2 cannot pass through the second microstructures 12 to achieve the purpose of increasing the light-emitting angle. The vertex angle theta of the triangular structure, the bottom edge opening length L3 of the triangular structure and the height of the triangular structure are H, so that the value range of the theta is 105-145 degrees. Such as 110 °, 120 °, 130 °, etc. L3, that is, the triangular structure is an isosceles triangle structure or an equilateral triangle structure, and correspondingly, the vertex angle of the triangular structure ranges from 60 ° to 90 °. And L3 is 1.5-2 times of L2. The design can enable light to be reflected and refracted more times, and the utilization rate of light energy is higher.
Example 2
Referring to fig. 3 to 12, a backlight module of the present embodiment includes the light guide plate structure of embodiment 1 and a backlight source 2 disposed toward the light incident surface of the light guide plate. Due to the adoption of the light guide plate structure, the light guide plate structure at least has the beneficial effects.
Example 3
Referring to fig. 3 to 12, a display device of the present embodiment includes the backlight module of embodiment 2 and a display screen. Due to the adoption of the backlight module, the backlight module at least has the beneficial effects.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (10)
1. A light guide plate structure, comprising:
the light guide plate comprises a light guide plate body (1) and a light guide plate body, wherein the light guide plate body is provided with a light incoming surface and a light outgoing surface which are opposite, the light incoming surface faces a backlight source (2) and is provided with a groove (10) matched with the backlight source (2) in shape;
at least one first microstructure (11) which is formed on the bottom wall surface of the groove (10), is arranged opposite to the backlight source (2) and is used for diffusing the light-emitting angle of the backlight source (2);
the second microstructures (12) are formed on the bottom wall surface of the groove (10) and are opposite to the blank area between two adjacent backlight sources (2), and the second microstructures (12) are inwards recessed towards the direction far away from the backlight sources (2) so as to increase the reflection and refraction of light rays emitted by the backlight sources (2).
2. The light guide plate structure of claim 1, wherein the first microstructures (11) comprise a plurality of side-by-side microstructures recessed away from the backlight (2), and each microstructure has a curved surface or a trapezoidal surface.
3. The light guide plate structure of claim 2, wherein a center of a circle corresponding to the arc surface of the first microstructure (11) is located on one side of the light incident surface or one side of the light emitting surface.
4. The light guide plate structure of claim 2, wherein adjacent end points of any two adjacent curved surfaces of the first microstructures (11) are connected; the outer end points of any two adjacent trapezoidal surfaces of the first microstructure (11) are connected.
5. The light guide plate structure of claim 2, wherein adjacent end points of any two adjacent curved surfaces of the first microstructures (11) are connected by a horizontal segment; the outer end points of any two adjacent trapezoidal surfaces of the first microstructure (11) are connected through a horizontal section.
6. A light guide plate structure according to claim 2, wherein the first microstructures (11) and the second microstructures (12) each comprise at least two, and at least two of the first microstructures (11) and at least two of the second microstructures (12) are arranged alternately.
7. The light guide plate structure of claim 1 or 2, wherein all the microstructures of any of the first microstructures (11) have a length of L1, and the backlight source (2) has a length of L2, such that L1 > L2;
the second microstructure (12) is a triangular structure, the opening width of the bottom edge of the triangular structure is L3, the height of the triangular structure is H, H is L3, and the height of the triangular structure is 1.5-2 times of L2.
8. The light guide plate structure of claim 7, wherein the apex angle θ of the triangular structure is in the range of 105 ° to 145 °.
9. A backlight module, comprising the light guide plate structure of any one of claims 1 to 8 and a backlight (2) disposed towards the light incident surface of the light guide plate.
10. A display device comprising a display screen and the backlight module of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120662498.3U CN214375379U (en) | 2021-03-31 | 2021-03-31 | Light guide plate structure, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120662498.3U CN214375379U (en) | 2021-03-31 | 2021-03-31 | Light guide plate structure, backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214375379U true CN214375379U (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120662498.3U Active CN214375379U (en) | 2021-03-31 | 2021-03-31 | Light guide plate structure, backlight module and display device |
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| Country | Link |
|---|---|
| CN (1) | CN214375379U (en) |
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2021
- 2021-03-31 CN CN202120662498.3U patent/CN214375379U/en active Active
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