Front-light module and display apparatus

Abstract

A front light module suitable for placement on the display surface of a display panel. The front light module includes a light guide plate. The light guide plate has a light incident surface, a first surface, and a second surface. The light incident surface connects the first surface and the second surface, and the first surface is opposite to the second surface. The light guide plate includes a plurality of microstructures. The microstructures are disposed on the first surface. Each microstructure has a first structural surface facing the light incident surface, and the included angle between the first structural surface and the first surface is in the range of 15 degrees and 25 degrees. A display device is also proposed.

Claims

1. A front light module, suitable for being disposed on the display surface of a display panel, comprising: A light guide plate has a light incident surface, a first surface, and a second surface, the light incident surface being connected between the first surface and the second surface, and the first surface being opposite to the second surface. The light guide plate includes: a plurality of microstructures disposed on the first surface; wherein each of the microstructures has a first structural surface facing the light incident surface, and the angle between the first structural surface and the first surface is in the range of 15 degrees and 25 degrees.

2. The front light module as claimed in claim 1, wherein the refractive index of the light guide plate falls in the range of 1.48 to 1.

6.

3. The front light module as claimed in claim 1, wherein the width of each of the microstructures in the direction away from the light-incident surface falls in the range of 10 micrometers to 150 micrometers, and the height of the top of each of the microstructures relative to the first surface falls in the range of 1 micrometer to 15 micrometers.

4. The front light module as claimed in claim 1, wherein the light incident surface includes a plurality of sub-light incident surfaces that are adjacent to or opposite to each other.

5. The front light module as claimed in claim 1, wherein the microstructures are conical, pyramidal, triangular prism, or semi-cylindrical.

6. The front light module as claimed in claim 1, wherein the microstructures are in the shape of an eccentric triangular pyramid or an eccentric quadrangular pyramid.

7. The front light module as claimed in claim 6, wherein the microstructures are in the shape of an eccentric quadrangular pyramid, and the first structural surface includes a ridge and two conical surfaces connecting the ridge, wherein the included angle between the ridge and the first surface of the first structural surface is in the range of 15 degrees and 25 degrees.

8. A display device, comprising: A display panel having a display surface; a cover plate disposed on the display surface of the display panel; The system also includes a front light module disposed between the display panel and the cover plate. The front light module includes: a light guide plate having a light incident surface, a first surface, and a second surface, the light incident surface being connected between the first surface and the second surface, and the first surface being opposite to the second surface. The light guide plate includes: a plurality of microstructures disposed on the first surface; at least one light source disposed beside the light incident surface; a first optical adhesive layer disposed on the first surface and located between the light guide plate and the cover plate; and a second optical adhesive layer disposed on the second surface and located between the light guide plate and the display panel. The refractive indices of the first optical adhesive layer and the second optical adhesive layer are less than the refractive index of the light guide plate. The microstructures have a first structural surface facing the at least one light source, and the angle between the first structural surface and the first surface is in the range of 15 degrees and 25 degrees.

9. The display device as claimed in claim 8, wherein the refractive index of the first optical adhesive layer falls in the range of 1.40 to 1.

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10. The display device as claimed in claim 8, wherein the refractive index of the second optical adhesive layer falls in the range of 1.40 to 1.

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11. The display device as claimed in claim 8, wherein the refractive index of the light guide plate falls in the range of 1.48 to 1.

6.

12. The display device of claim 8, wherein the width of each of the microstructures in the direction from the at least one light source toward the light-incident surface falls within the range of 10 micrometers to 150 micrometers, and the height of the top of each of the microstructures relative to the first surface falls within the range of 1 micrometer to 15 micrometers.

13. The display device as claimed in claim 8, wherein the light-incident surface comprises a plurality of sub-light-incident surfaces that are adjacent to or opposite to each other.

14. The display device as claimed in claim 8, wherein the microstructures are conical, pyramidal, triangular prism, or semi-cylindrical.

15. The display device as claimed in claim 8, wherein the microstructures are in the shape of an eccentric triangular pyramid or an eccentric quadrangular pyramid.

16. The display device of claim 15, wherein the microstructures are in the shape of an eccentric quadrangular pyramid, and the first structural surface includes a ridge and two conical surfaces connecting the ridge, wherein the included angle between the ridge and the first surface is in the range of 15 degrees and 25 degrees.

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