CN209911591U

CN209911591U - Light guide plate

Info

Publication number: CN209911591U
Application number: CN201920488993.XU
Authority: CN
Inventors: 方运; 刘伟
Original assignee: Upgrade Photoelectric (kunshan) Co Ltd
Current assignee: Upgrade Photoelectric (kunshan) Co Ltd; Shine Optoelectronics Kunshan Co Ltd
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2020-01-07
Anticipated expiration: 2029-04-11

Abstract

The utility model provides a light guide plate, it includes main part, plural light guide unit and point light source, the main part includes going into the plain noodles and goes out the plain noodles, plural light guide unit distributes in going out the plain noodles and/or goes out the plain noodles opposite face, light guide unit includes topside, both sides limit and base, and topside from going into the plain noodles department to base setting, wherein, the length of topside of light guide unit is less than the length of base; the point light source is arranged on the light incident surface side, and the width of the top edge of each light guide unit is larger and larger as the top edge is farther away from the point light source in the direction parallel to the light incident surface, so that the reflection of the light guide plate to light rays can be improved, the uniformity of the light guide plate is improved, and the brightness of the light guide plate is enhanced.

Description

Light guide plate

Technical Field

The utility model relates to a field in a poor light, in particular to light guide plate.

Background

The light guide plate is an important component of the backlight module and is used for converting a linear light source into a surface light source. The method comprises the following steps of firstly, arranging a micro-nano structure on a light-emitting surface, converting light rays into uniform light by utilizing reflection or refraction of the micro-nano structure, and emitting the uniform light from the light-emitting surface, but the method has the defect that light and shade alternate stripes appear in an image of a display; secondly, the micro-nano structure is arranged on the light incoming surface, and the micro-nano structure is arranged on the light outgoing surface or the opposite surface of the light outgoing surface, so that the method has the defect that the brightness of the light guide plate is poor due to the fact that light rays are reflected and refracted in a large quantity.

SUMMERY OF THE UTILITY MODEL

The utility model provides a light guide plate is in order to solve above-mentioned problem.

The utility model relates to a technical scheme of light guide plate is:

a light guide plate, comprising:

the main body comprises a light incident surface and a light emergent surface;

a point light source located on the light entrance surface side;

the light guide units are distributed on the light-emitting surface and/or the opposite surface of the light-emitting surface, each light guide unit comprises a top edge, two side edges and a bottom edge, the top edge is arranged from the light-in surface to the bottom edge, and the length of the top edge is smaller than that of the bottom edge;

in the direction parallel to the light incident surface, the length of the top edge of each light guide unit is increased along with the increase of the distance between the light guide unit and the point light source.

In one embodiment, the plurality of light guide units are provided with a plurality of first light guide surfaces forming an acute angle β with the direction from the bottom edge to the top edge and a plurality of second light guide surfaces forming an acute angle α with the direction from the top edge to the bottom edge, and the acute angle β is greater than the acute angle α.

In one embodiment, the distances from the top edge of each light guide unit to the light incident surface are equal.

In one embodiment, the lengths of the bottom sides of the light guide units are equal, and the width increase amplitudes of the light guide units are unequal in the direction from the top side to the bottom side.

In one embodiment, the light guide units are arranged at intervals, the distance between any two adjacent light guide units is equal or unequal at the bottom edge, and no structure is arranged between the adjacent light guide units.

In one embodiment, the shape of the side edge is one or a combination of two or more of a straight line, a curve, an arc line and a wavy line.

In one embodiment, the light guide units are disposed in a plurality of protruding structures and/or recessed structures.

In one embodiment, the plurality of first light guide surfaces and the plurality of second light guide surfaces are respectively parallel to the light incident surface, and the connection position of the plurality of first light guide surfaces and the plurality of second light guide surfaces is one or a combination of more than two of a V shape, an S shape, a wave shape or a polygon shape.

In one embodiment, the light guide plate further includes a light-condensing layer, the light-condensing layer is disposed by a plurality of convex structures and/or concave structures, and the plurality of convex structures and/or concave structures are continuously and/or intermittently distributed on opposite sides of the plurality of light guide units.

In one embodiment, the cross section of the plurality of convex structures and/or concave structures is one or a combination of two or more of arc, semicircle, triangle or polygon.

The utility model has the advantages that: the length of leaded light unit topside is less than the length on base and in the direction of the parallel income plain noodles, and the topside width of the leaded light unit of keeping away from the pointolite is big more, sets up the reflection that the leaded light unit can improve the light guide plate to light like this, improves the degree of consistency of light guide plate.

Drawings

Fig. 1 is a schematic structural view of a light guide plate according to the present invention;

fig. 2 is a schematic top view of a light guide plate according to the present invention;

FIG. 3 is a schematic view of the cross-sectional view of AA' of FIG. 2 according to the present invention;

FIG. 4 is a schematic side view of a portion of BB' of FIG. 2 according to the present invention;

fig. 5 is a schematic structural view of another light guide plate according to the present invention.

Detailed Description

With the understanding of the present invention facilitated, the present invention will be described more fully with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model provides a light guide plate, it includes main part, plural light guide unit and point light source, the main part includes going into the plain noodles and goes out the plain noodles, plural light guide unit distributes in going out the plain noodles and/or goes out the plain noodles opposite face, light guide unit includes topside, both sides limit and base, and topside from going into the plain noodles department to base setting, wherein, the length of topside of light guide unit is less than the length of base; the pointolite is located into the plain noodles side, and in the direction of parallel income plain noodles, the width of the topside of each leaded light unit is far away and big more from the pointolite, utilizes the setting that changes the width of leaded light unit topside to improve the reflection of light guide plate to light, improves the degree of consistency of light guide plate, strengthens the luminance of light guide plate simultaneously.

In one embodiment, the plurality of light guide units are provided with a plurality of first light guide surfaces and a plurality of second light guide surfaces, wherein the first light guide surfaces and the bottom edge of the light guide units form an acute angle beta in a direction pointing to the top edge, and the second light guide surfaces and the top edge of the light guide units form an acute angle alpha in a direction pointing to the bottom edge, the acute angle beta is larger than the acute angle alpha, and alpha is larger than or equal to 1.

In one embodiment, the lengths of the bottom edges of the light guide units are equal, and the width increase amplitudes of the light guide units are unequal in the direction from the top edge to the bottom edge; in the direction of the parallel light incoming surface, the distance from the top edge of each light guide unit to the light incoming surface is equal, the width increasing amplitude of the light guide unit far away from the point light source is smaller than that of the light guide unit close to the point light source, the width of the top edge of the light guide unit far away from the point light source is increased, the light reflection is enhanced, and the brightness of the light guide plate is enhanced.

In one embodiment, the side edge of each light guide unit is one or a combination of more than two of a straight line, a curve, an arc line and a wavy line; the shapes of two side edges of the same light guide unit are arranged differently or identically.

In one embodiment, the plurality of light guide units are arranged in a plurality of protruding structures and/or recessed structures, the plurality of light guide units are distributed at intervals, no structure is arranged between every two adjacent light guide units, the bottom edges of the plurality of light guide units are equal, and the distance between any two adjacent light guide units is equal or unequal at the bottom edges.

In one embodiment, the light guide units are provided with a plurality of first light guide surfaces and a plurality of second light guide surfaces which are obliquely arranged, the plurality of first light guide surfaces and the plurality of second light guide surfaces are respectively parallel to the light incident surface, the lower joints of the plurality of first light guide surfaces and the plurality of second light guide surfaces are arranged in a V shape, the upper joints of the plurality of first light guide surfaces and the plurality of second light guide surfaces are arranged in an inverted V shape, and in other modes, the upper joints or the lower joints of the plurality of first light guide surfaces and the plurality of second light guide surfaces are one or a combination of more than two of S shapes, wave shapes or polygons.

In one embodiment, the light guide plate further comprises a light-condensing layer disposed on the plurality of convex structures and/or concave structures, the light-condensing layer is located on the opposite side of the plurality of light guide units, and the plurality of convex structures and/or concave structures are arranged at intervals and/or continuously; the section of the plurality of convex structures and/or concave structures is one or the combination of more than two of arc, semicircle, triangle or polygon; the convex structure and/or the concave structure is arranged by a cylindrical mirror, a small short line or a micro lens.

The following description refers to the drawings for illustrating a light guide plate according to the present invention.

Referring to fig. 1, the present invention discloses a light guide plate 100, which includes a main body 110, a plurality of light guide units 120 and a point light source 130, wherein the main body 110 includes a light incident surface 111 and a light exiting surface 112, and the point light source 130 is located at the side of the light incident surface 112; preferably, the light guiding units 120 are disposed in a convex structure and disposed on the light emitting surface 111, and in other embodiments, the light guiding units 120 are disposed in a concave structure or disposed in a partially convex structure and partially concave structure distributed on the light emitting surface 111 or on an opposite surface of the light emitting surface 111. The plurality of light guide units 120 are arranged at intervals, and no structure is arranged between the adjacent light guide units 120; the light guide units 120 include a top side 1201, a bottom side 1202, and two side edges 1203, wherein the bottom side 1202 of each light guide unit 120 is equal in length, and the distance between any two adjacent light guide units 120 at the bottom side 1202 is also equal. In other embodiments, the size of the space at the bottom side 1202 can be adjusted to adjust the density of the light guide unit according to different process requirements.

Referring to fig. 2, in the direction from the top side 1201 to the bottom side 1202, the width of the light guide unit 120 is continuously increased, and the increase of the width of the light guide unit 120 away from the point light source 130 is smaller than the increase of the width of the light guide unit 120 close to the point light source 130; in the direction parallel to the light incident surface 111, the greater the distance between each light guide unit 120 and the point light source 130, the greater the length of the top side 1201 of each light guide unit 120; since the top side length 1201 increases with the distance from the point light source 130, the reflection of weak light rays can be improved, so that the light rays can be uniformly emitted from the light emitting surface 112, and the brightness of the light guide plate 100 can be improved.

Referring to fig. 3, fig. 3 is a partial cross-sectional view of AA' in fig. 2, a plurality of first light guide surfaces 150 and a plurality of second light guide surfaces 160 are obliquely disposed on the plurality of light guide units 120, and the first light guide surface forming an acute angle β with the direction from the bottom edge to the top edge is the first light guide surface, and the second light guide surface forming an acute angle α with the direction from the top edge to the bottom edge is the second light guide surface. The range of the angle α is 1 ° to 10 °, the angle β is greater than 10 ° and less than or equal to 30 °, and the angle β is greater than the angle α, so that more incident light rays can be reflected, and the brightness of the light guide plate 100 can be increased. The junction of the first light guide surface 150 and the second light guide surface 160 is V-shaped, the width W of the opening of the first light guide surface 150 and the second light guide surface 160 is equal, and the depth H from the opening to the junction of the first light guide surface 150 and the second light guide surface 160 is also equal. The light guide plate 100 further includes a light-condensing layer 140 disposed on the light-emitting surface opposite to the light-emitting surface of the light guide plate 100.

Referring to fig. 4, fig. 4 is a partial side view of BB' of fig. 2, the light guiding units 120 are spaced apart by a distance P1, wherein the distance P1 is equal; the length of the bottom side of the single light guide unit 120 is P2, wherein the lengths P2 of the bottom sides of the light guide units 120 are equal. In other embodiments, the pitches P1 of the light guide units 120 are not equal, and the pitch P1 is utilized to adjust the density between the light guide units 120 so as to change the brightness of the light guide plate 100, thereby improving the uniformity of the light emitted from the light emitting surface 112. Preferably, the light-condensing layer 140 includes a plurality of convex structures 1401, the convex structures 1401 are arranged for the whole cylindrical mirror, and the cross-sectional shape of the plurality of convex structures 1401 is arc-shaped and is continuously arranged; in the figure, the width w1 of each protruding structure 1401 is equal and the height h1 is also equal, so as to prevent the total reflection of light in the light guide plate 100.

In other modes, the light-gathering layer is of a plurality of concave structures or partial concave structures of partial convex structures, and the plurality of convex structures and/or concave structures are arranged in a small short line or micro-lens arrangement mode and are continuously or alternately arranged on the opposite surface of the light-emitting surface; the width and/or height of the plurality of convex structures and/or concave structures are arranged in different ways, and the cross section of the plurality of convex structures and/or concave structures is one or the combination of more than two of semicircle, triangle or polygon.

Referring to fig. 5, another light guide plate 200 of the present invention includes a main body 210, a plurality of light guide units 220 and a point light source 230, wherein the main body 210 includes a light incident surface 211 and a light exiting surface 212, and the point light source 230 is located at the side of the light incident surface 212; the light guide units 220 are arranged in a convex structure, and are distributed on the light emitting surface 211 at intervals, and no structure is arranged between adjacent light guide units 220. The light guide unit 220 includes a top side 2201, a bottom side 2202 and two side edges 2203, and in the direction parallel to the light incident surface 211, the length of the top side 2201 of the light guide unit 220 far away from the point light source 230 is larger, and the length of the top side 2201 of the light guide unit 220 closer to the point light source 230 is shorter; moreover, the shape of the two side edges 2203 of the same light guiding unit 220 is a combination of a straight line and a partial arc part straight line, and changing the shape of the side edges 2203 does not affect the effect of improving the brightness of the light guiding plate 200, which is an improvement according to different processes.

In other embodiments, the side of each light guiding unit is a combination of one or more of a curve, a wavy line, a straight line and a broken line, and the two sides of the same light guiding unit have the same or different shapes.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail with reference to the accompanying drawings. In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the invention. Moreover, the technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A light guide plate, comprising:

the main body comprises a light incident surface and a light emergent surface;

a point light source located on the light entrance surface side;

the light guide units are distributed on the opposite surface of the light emitting surface and/or the light emitting surface, each light guide unit comprises a top edge, two side edges and a bottom edge, the top edge is arranged from the light incident surface to the bottom edge, and the length of the top edge is smaller than that of the bottom edge;

2. The light guide plate according to claim 1, wherein the plurality of light guide units have a plurality of first light guide surfaces forming an acute angle β with the bottom side pointing to the top side and a plurality of second light guide surfaces forming an acute angle α with the top side pointing to the bottom side, and the acute angle β is greater than the acute angle α.

3. The light guide plate according to claim 1, wherein the distances from the top edge of each light guide unit to the light incident surface are equal.

4. The light guide plate according to claim 1, wherein the bottom side of each light guide unit has an equal length, and the width of each light guide unit increases by an unequal amount in a direction from the top side to the bottom side.

5. The light guide plate according to claim 3, wherein the light guide units are spaced apart from each other, and at the bottom edge, the distance between any two adjacent light guide units is equal or different, and there is no structure between the adjacent light guide units.

6. The light guide plate according to claim 1, wherein the shape of the side edge is one or a combination of two or more of a straight line, a curved line, an arc line and a wavy line.

7. The light guide plate according to claim 1, wherein the plurality of light guide units are disposed in a plurality of convex structures and/or concave structures.

8. The light guide plate according to claim 1, wherein the plurality of first light guide surfaces and the plurality of second light guide surfaces are parallel to the light incident surface, respectively, and a joint between the plurality of first light guide surfaces and the plurality of second light guide surfaces is one or a combination of two or more of a V shape, an S shape, a wave shape or a polygon shape.

9. The light guide plate according to any one of claims 1 to 8, further comprising a light-condensing layer, wherein the light-condensing layer is disposed by a plurality of convex structures and/or concave structures, and the plurality of convex structures and/or concave structures are continuously and/or intermittently distributed on opposite sides of the plurality of light guide units.

10. The light guide plate according to claim 9, wherein the cross-section of the plurality of convex structures and/or concave structures is one or a combination of two or more of arc, semicircle, triangle or polygon.