CN211014707U - Light guide plate and backlight module - Google Patents

Abstract

A light guide plate comprises a mesh point surface and a light emitting surface opposite to the mesh point surface, wherein a light condensing protrusion and a plurality of strip-shaped insections are arranged on the light emitting surface and are located on two sides of the light condensing protrusion, each strip-shaped insection comprises a first surface and a second surface, the first surface is used for changing a light emitting angle, the first surface is opposite to the light condensing protrusion, and the second surface is opposite to the light condensing protrusion. The light guide plate of the utility model can gather the light rays at two sides or around to the middle part of the light guide plate, has the light collecting function, increases the intensity of the emergent light at the front side, and can clearly and completely observe the picture when people are far away; moreover, when the light rays on the two sides or the periphery of the light guide plate are gathered towards the middle part of the light guide plate, the light rays on the two sides or the periphery of the light guide plate are reduced, the pictures on the two sides or the periphery of the light guide plate become fuzzy, the visual angle of the display device is reduced, and the peep-proof effect is achieved. The utility model also provides a backlight module.

Description

Light guide plate and backlight module

Technical Field

The utility model relates to a show technical field, especially relate to a light guide plate and backlight unit.

Background

The backlight module generally includes a light guide plate, and the light guide plate is used for guiding the propagation direction of the light beam generated by the light source, so as to improve the luminance of the backlight module, ensure the uniformity of the luminance of the backlight module, and convert the point light source or the line light source in the backlight module into the surface light source to be provided to the display panel.

The printed light guide plate is characterized in that light guide microstructure points are printed on the bottom surface of an optical acrylic plate by utilizing the optical acrylic or PC plate and then using a high-tech material with extremely high reflectivity and no light absorption. However, in the conventional light guide plate, the light is scattered in a diffuse reflection manner, and when a person is far away, the person cannot clearly observe the image.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a light guide plate and backlight unit can gather light guide plate both sides or light all around to its middle part, has the light effect of receiving, when the people is under the condition far away from, can clearly, observe the picture completely.

A light guide plate comprises a mesh point surface and a light emitting surface opposite to the mesh point surface, wherein a light condensing protrusion and a plurality of strip-shaped insections are arranged on the light emitting surface and are located on two sides of the light condensing protrusion, each strip-shaped insection comprises a first surface and a second surface, the first surface is used for changing a light emitting angle, the first surface is opposite to the light condensing protrusion, and the second surface is opposite to the light condensing protrusion.

Furthermore, the light-gathering protrusion is in a linear shape, and the cross section of the light-gathering protrusion is arc-shaped.

Further, the first surface is a plane, and the second surface is a curved surface or a plane.

Further, the width of the cross section of the adjacent strip-shaped insections is gradually reduced towards the direction far away from the light-gathering protrusion.

Further, the light guide plate also comprises a light guide dot microstructure, and the light guide dot microstructure is positioned on a dot surface opposite to the light condensation bulges and the strip-shaped insections.

The utility model also provides a light guide plate, including the dot face and the play plain noodles relative with the dot face, be equipped with spotlight arch and a plurality of bar insection on the play plain noodles, bar insection sets up around spotlight is bellied, and bar insection is including the first surface and the second surface that are used for changing light-emitting angle, and the first surface is just protruding to spotlight, and the second surface is protruding to spotlight dorsad.

Further, the first surface is a plane, and the second surface is a curved surface or a plane.

Further, the cross section of the strip-shaped insection is triangular.

Further, the light guide plate also comprises a light guide dot microstructure, and the light guide dot microstructure is positioned on a dot surface opposite to the light condensation bulges and the strip-shaped insections.

The utility model also provides a backlight module, including foretell light guide plate.

The light condensing protrusions and the strip-shaped insection of the light guide plate are positioned at the light-emitting side of the light guide plate, the strip-shaped insection is positioned at the two sides of the light condensing protrusions or arranged around the light condensing protrusions, the light-emitting angle of light can be changed by the strip-shaped insection, the light at the two sides or around the light guide plate can be gathered towards the middle part of the light guide plate, the light-receiving effect is achieved, the intensity of front emergent light is increased, and when people are far away, the pictures can be clearly and completely observed; moreover, when the light rays on the two sides or the periphery of the light guide plate are gathered towards the middle part of the light guide plate, the light rays on the two sides or the periphery of the light guide plate are reduced, the pictures on the two sides or the periphery of the light guide plate become fuzzy, the visual angle of the display device is reduced, and the peep-proof effect is achieved.

Drawings

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

Fig. 2 is a schematic cross-sectional view of a light guide plate according to a first embodiment of the present invention.

Fig. 3 is a schematic view illustrating the light ray of the first embodiment of the present invention being transmitted in the light guide plate.

Fig. 4 is a schematic cross-sectional view of a light guide plate according to a second embodiment of the present invention.

Fig. 5 is a schematic front view of a light guide plate according to a third embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view taken along line a-a in fig. 5.

Fig. 7 is a schematic cross-sectional view at B-B in fig. 5.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Fig. 1 is a schematic structural view of a light guide plate according to a first embodiment of the present invention. As shown in fig. 1, the light guide plate 10a includes a dot surface 14 and a light-emitting surface opposite to the dot surface 14, the light-emitting surface is provided with light-gathering protrusions 12a and a plurality of strip-shaped insections 13a, and the dot surface 14 is provided with a plurality of light-guiding dot microstructures (not shown). The light-condensing protrusion 12a is located in the middle of the light-emitting surface of the light guide plate 10a, and the strip-shaped insection 13a is located on both sides of the light-condensing protrusion 12 a. referring to fig. 2, the strip-shaped insection 13a includes a first surface 131 and a second surface 132 for changing the light-emitting angle, the first surface 131 faces the light-condensing protrusion 12a, and the second surface 132 faces away from the light-condensing protrusion 12 a. In the embodiment, the light guide dot microstructures may be specifically grooves or protrusions, and the light guide dot microstructures are used for reflecting or scattering light to the light collecting protrusions 12a and the strip-shaped insections 13 a.

Fig. 2 is a schematic cross-sectional view of a light guide plate according to a first embodiment of the present invention. As shown in fig. 1 and 2, the light-gathering protrusion 12a has a linear shape and an arc-shaped cross section, and the first surface 131 of the strip-shaped insection 13a is a plane, and the second surface 132 is a curved surface, but not limited thereto, for example, the first surface 131 and the second surface 132 are both curved surfaces, or the first surface 131 is a curved surface, and the second surface 132 is a plane. The width of the cross section of each two adjacent elongated insections 13a gradually decreases away from the light-gathering protrusion 12a, but not limited thereto, and in other embodiments, the width of the cross section of each two adjacent elongated insections 13a is the same. The curved surface can change the light-emitting angle of the light well, and collect the light toward the light-collecting protrusion 12a, that is, toward the middle of the light guide plate 10 a.

Fig. 3 is a schematic view illustrating the light ray of the first embodiment of the present invention being transmitted in the light guide plate. As shown in fig. 3, the working principle of the light guide plate 10a of the present invention is roughly: the light source is a side-in type light source, after entering the light guide plate 10a, light is reflected or scattered to the light-gathering protrusions 12a and the strip-shaped insections 13a through the light guide dot microstructures, the light-emitting angles of part of the light are changed by the cambered surfaces of the light-gathering protrusions 12a, the light-emitting directions of the light-gathering protrusions face the middle of the light-gathering protrusions 12a, the light-emitting angles of the other part of the light are changed by the second surfaces 132 of the strip-shaped insections 13a, the light-emitting directions of the light-gathering protrusions face the light-gathering protrusions 12a, namely the middle of the light guide plate 10a, because the strip-shaped insections 13a gather the light on two sides of the light guide plate 10a to the middle of the light guide plate 10a, and the light-gathering effect of the light-gathering.

Fig. 4 is a schematic cross-sectional view of a light guide plate according to a second embodiment of the present invention. As shown in fig. 4, the light guide plate 10b of the present embodiment has substantially the same structure as the light guide plate 10a of the first embodiment, except that the cross section of the stripe-shaped insection 13b of the present embodiment is triangular.

Specifically, the first surface 131 and the second surface 132 of the stripe 13b are both flat surfaces, and the first surface 131 and the second surface 132 form an included angle with the length direction or the width direction of the light guide plate 10b, and in order to better concentrate the light on both sides of the light guide plate 10b toward the light-concentrating protrusion 12a, the included angle is preferably an obtuse angle.

Fig. 5 is a schematic front view of a light guide plate according to a third embodiment of the present invention. Fig. 6 is a schematic cross-sectional view taken along line a-a in fig. 5. Fig. 7 is a schematic cross-sectional view at B-B in fig. 5. As shown in fig. 5 to 7, the light guide plate 10c of the present embodiment has substantially the same structure as the light guide plate 10a of the first embodiment, except that the stripe-shaped insections 13a of the present embodiment are disposed around the light collecting protrusions 12 b.

Specifically, the light-gathering protrusion 12b has a hemispherical shape, but not limited thereto, and in other embodiments, the light-gathering protrusion 12b has a linear shape, a length smaller than that of the light-gathering protrusion 12a in the previous embodiments, and a cross-section having an arc shape. As shown in fig. 5, a part of the stripe 13a is arranged in the B-B direction and has a length identical to that of the light guide plate 10B, and a part of the stripe 13a is arranged in the a-a direction and has a length identical to that of the cross-section of the light-condensing protrusion 12B in the a-a direction. Wherein the first surface 131 of the stripe 13a faces the light-gathering protrusion 12b, and the second surface 132 faces away from the light-gathering protrusion 12. In the present embodiment, the first surface 131 is a plane, and the second surface 132 is a curved surface, but not limited thereto, for example, the first surface 131 and the second surface 132 are both curved surfaces, or the first surface 131 is a curved surface and the second surface 132 is a plane. Referring to fig. 5, the width of the cross section of two adjacent stripe serrations 13a gradually decreases in a direction away from the light-gathering protrusion 12 b.

When light enters the light guide plate 10c, the light-emitting direction of the light faces the light-gathering protrusions 12b by the strip insections 13a located around the light-gathering protrusions 12b, namely, the center of the light guide plate 10c, the light around the light guide plate 10c is gathered towards the center by the strip insections 13a, the energy of the positive emergent light of the light guide plate 10c is increased, and when a person is far away, the person can clearly and completely observe a picture.

The utility model discloses a spotlight arch 12a, 12b and bar insection 13a, 13b of light guide plate 10a, 10b, 10c all are located the light-emitting side of light guide plate 10a, 10b, 10c, bar insection 13a, 13b are located spotlight arch 12a, 12 b's both sides or set up around spotlight arch 12a, 12b, bar insection 13a, 13b can change the light-emitting angle of light, can gather light guide plate 10a, 10b, 10c both sides or light all around to its middle part, have the effect of receiving light, increase the intensity of positive emergent light, when the people is under the condition far away in distance, can clearly, observe the picture completely; moreover, when the light rays at two sides or the periphery of the light guide plates 10a, 10b, 10c are gathered towards the middle part, the light rays at two sides or the periphery thereof will be reduced, the pictures at two sides or the periphery of the light guide plates 10a, 10b, 10c will become blurred, the visual angle of the display device becomes smaller, and the peep-proof effect is achieved.

The utility model also provides a backlight module, including foretell light guide plate 10a, 10b, 10 c.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the sake of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

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.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a light guide plate, its characterized in that includes the net dot face and goes out the plain noodles relative with the net dot face, be equipped with spotlight arch and a plurality of bar insection on the light-emitting face, the bar insection is located the bellied both sides of spotlight, the bar insection is including the first surface and the second surface that are used for changing light-emitting angle, the first surface is just right spotlight arch, the second surface is back to spotlight arch.

2. The light guide plate according to claim 1, wherein the light condensing protrusions have a linear shape and an arc-shaped cross section.

3. The light guide plate according to claim 1, wherein the first surface is a flat surface and the second surface is a curved surface or a flat surface.

4. The light guide plate according to claim 1, wherein the width of the cross section of the adjacent stripe-shaped insections is gradually decreased in a direction away from the light-condensing protrusion.

5. The light guide plate according to claim 1, wherein the light guide plate further comprises light guide dot microstructures, and the light guide dot microstructures are located on the dot surface opposite to the light condensing protrusions and the strip-shaped insections.

6. The utility model provides a light guide plate, its characterized in that includes the net dot face and goes out the plain noodles relative with the net dot face, be equipped with spotlight arch and a plurality of bar insection on the light-emitting face, the bar insection sets up spotlight is bellied all around, the bar insection is including being used for changing first surface and the second surface of light-emitting angle, first surface is just right spotlight arch, the second surface is back to spotlight arch.

7. The light guide plate according to claim 6, wherein the first surface is a flat surface and the second surface is a curved surface or a flat surface.

8. The light guide plate according to claim 6, wherein the width of the cross section of the adjacent stripe-shaped insections is gradually decreased in a direction away from the light-condensing protrusion.

9. The light guide plate according to claim 6, wherein the light guide plate further comprises light guide dot microstructures, and the light guide dot microstructures are located on the dot surface opposite to the light condensing protrusions and the strip-shaped insections.

10. A backlight module comprising the light guide plate according to any one of claims 1 to 9.

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