Surface light emitter, display apparatus and light control member

Abstract

To improve the front brightness of the light emitted from a surface light emitter having a surface light emitting device. In the surface light emitter to which a light control sheet having depressions is provided, the surface of the light control sheet having the depressions is adhered to a light emitting side surface of a surface light emitting device, and the transparent material whose refractive index is lower than the refractive index of the light control sheet is arranged in the spaces formed between the depressions and the light emitting side surface of the surface light emitting device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1(A) is a plan view of the opposite side to an light emitting side surface of the light control sheet used for the surface light emitter according to an embodiment 1.

FIGS. 1(B) and 1(C) are cross section view of the light control sheet of FIG. 1(A) along the line A-A. FIGS. 2(A) and 2(B) are general cross section views showing the surface light emitter according to the embodiment 1 of the present invention.

FIG. 3 is a partial enlargement explain view of the surface light emitting device according to the embodiment 1 of the present invention.

FIG. 4(A) is a plan view of the opposite side to the light emitting side surface of the light control sheet used for the surface light emitter according to the present invention.

FIG. 4(B) is a cross section view of the light control sheet of FIG. 4(A) along the line B-B.

FIG. 5(A) is a plan view of the opposite side to the light emitting side surface of the light control sheet used for the surface light emitter according to an embodiment 2 of the present invention.

FIGS. 5(B) and 5(C) are cross section views of the light control sheet of FIG. 5(A) along the line A-A.

FIG. 6(A) is a plan view of the opposite side to the light emitting side surface of the light control sheet used for the surface light emitter according to the present invention.

FIG. 6(B) is a cross section view of the light control sheet of FIG. 6(A) along the line A-A.

FIG. 7(A) is a plan view of the opposite side to the light emitting side surface of the light control sheet used for the surface light emitter according to the present invention.

FIG. 7(B) is a cross section view of the light control sheet of FIG. 7(A) along the line A-A.

FIG. 8(A) is a plan view of the opposite side to the light emitting side surface of the light control sheet used for the surface light emitter according to the present invention.

FIG. 8(B) is a cross section view of the light control sheet of FIG. 8(A) along the line A-A.

FIG. 9(A) is a plan view of a punch used when the light control sheet according to the present invention is manufactured.

FIG. 9(B) is a side view of the punch of FIG. 9(A).

FIGS. 10(A-1), 10(B-1), 10(C-1), 10(D-1), 10(E-1), 10(F-1), 10(G-1) and 10(H-1) are plan views of a punch which can be used when the light control sheet according to the present invention is manufactured.

FIGS. 10(A-2), 10(B-2), 10(C-2), 10(D-2), 10(E-2), 10(F-2), 10(G-2) and 10(H-2) are side views of the punch of FIGS. 10(A-1), 10(B-1), 10(C-1), 10(D-1), 10(E-1), 10(F-1), 10(G-1) and 10(H-1) respectively.

FIGS. 11(A) and 11(B) are general side views showing the surface light emitter according to the embodiment 2 of the present invention.

FIG. 12 is a partial enlargement explain view of the surface light emitting device according to the embodiment 2 of the present invention.

FIG. 13 is a general explain view showing the manufacturing method of the surface light emitter according to the embodiment 2 of the present invention.

FIG. 14(A) is a cross section view showing a structure of a display apparatus according to the embodiment 3 of the present invention.

FIG. 14(B) is a plan view showing a structure of a display apparatus according to the embodiment 3 of the present invention.

FIG. 15 is a cross section view showing a structure of a display apparatus according to the embodiment 4 of the present invention.

FIG. 16(A) is a plan view showing a general shape of a depression of an example 1.

FIG. 16(B) is a cross section view of a depression of FIG. 16(A) along the line A-A.

FIG. 16(C) is a cross section view of a depression of FIG. 16(A) along the line B-B.

FIG. 17 is a general view showing the shape of a depression of an example 7.

FIG. 18 is a general view showing the shape of a depression of an example 8.

FIG. 19 is a general view showing the shape of a depression of an example 10.

FIG. 20 is a general view showing the shape of a depression of an example 12.

FIG. 21 is a side view of the surface light emitting device of a comparative example 1.

FIG. 22 is a side view of the surface light emitter of the comparative example 2.

FIG. 23 is a view showing the light distribution characteristic of the surface light emitter of an example 1.

FIG. 24 is a view showing the light distribution characteristic of the surface light emitter of an example 2.

FIG. 25 is a view showing the light distribution characteristic of the surface light emitter of an example 3.

FIG. 26 is a view showing the light distribution characteristic of the surface light emitter of an example 4.

FIG. 27 is a view showing the light distribution characteristic of the surface light emitter of an example 5.

FIG. 28 is a view showing the light distribution characteristic of the surface light emitter of an example 6.

FIG. 29 is a view showing the light distribution characteristic of the surface light emitter of an example 7.

FIG. 30 is a view showing the light distribution characteristic of the surface light emitter of an example 8.

FIG. 31 is a view showing the light distribution characteristic of the surface light emitter of an example 9.

FIG. 32 is a view showing the light distribution characteristic of the surface light emitter of an example 10.

FIG. 33 is a view showing the light distribution characteristic of the surface light emitter of an example 11.

FIG. 34 is a view showing the light distribution characteristic of the surface light emitter of an example 12.

FIG. 35 is a view showing the light distribution characteristic of the surface light emitter of an example 13.

FIG. 36 is a view showing the light distribution characteristic of the surface light emitter of an example 14.

FIG. 37 is a view showing the light distribution characteristic of the surface light emitter of an example 15.

FIG. 38 is a view showing the light distribution characteristic of the surface light emitter of an example 16.

FIG. 39 is a view showing the light distribution characteristic of the surface light emitter of a comparative example 1.

FIG. 40 is a view showing the light distribution characteristic of the surface light emitter of a comparative example 2.

Claims

1. A surface light emitter, comprising: a surface light emitting device which has a light emitting side surface, through which the surface light emitting device emits light; anda light control sheet which has a flat surface which is spaced out with a plurality of depressions, the light control sheet being mounted on the light emitting device with the flat surface having the depressions bonded to the light emitting side surface,wherein transparent material is filled in spaces between the depressions and the light emitting side surface, a refractive index of the transparent material being lower than a refraction index of the light control sheet.

2. The surface light emitter of claim 1, wherein a shape of a longitudinal section of the depressions is a triangle, a trapezoid or an arc.

3. The surface light emitter of claim 1, wherein a depth of the depressions is the same as a thickness of the light control sheet.

4. The surface light emitter of claim 1, wherein the transparent material is air.

5. The surface light emitter of claim 1, wherein the transparent material is ultraviolet curable resin.

6. A display apparatus, comprising: a transmissive display device; anda surface light emitter, the surface light emitter including: a surface light emitting device which has a light emitting side surface, through which the surface light emitting device emits light; anda light control sheet which has a flat surface which is spaced out with a plurality of depressions, the light control sheet being mounted on the light emitting device with the flat surface having the depressions bonded to the light emitting side surface,wherein transparent material is filled in spaces between the depressions and the light emitting side surface, a refractive index of the transparent material being lower than a refraction index of the light control sheet, and the surface light emitter functions as a backlight.

7. A display apparatus, comprising: a surface light emitting device which has a matrix of a plurality of pixels arranged in a plane for emitting light;a light control sheet which has a flat surface which is spaced out with a plurality of depressions, the light control sheet being mounted on the light emitting device with the flat surface having the depressions bonded to the light emitting side surface,wherein transparent material is filled in spaces between the depressions and the light emitting side surface, a refractive index of the transparent material being lower than a refraction index of the light control sheet.

8. A light control member, comprising: a light control sheet which has a flat surface which is spaced out with a plurality of depressions; andtransparent material which is filled in the depressions to make a flat surface, a refractive index of the transparent material being lower than a refractive index of the light control sheet.

9. The light control member of claim 8, wherein a shape of a longitudinal section of the depressions is a triangle, a trapezoid or an arc.

10. The light control member of claim 8, wherein a depth of the depressions is the same as a thickness of the light control sheet.

11. The light control member of claim 8, wherein the transparent material is ultraviolet curable resin.

12. A surface light emitter, comprising: a surface light emitting device which has a light emitting side surface, through which the surface light emitting device emits light; anda light control member, the light control member including: a light control sheet which has a flat surface which is spaced out with a plurality of depressions, the light control sheet being mounted on the light emitting device with the flat surface having the depressions bonded to the light emitting side surface; andtransparent material which is filled in spaces between the depressions and the light emitting side surface for making a flat surface, a refractive index of the transparent material being lower than a refraction index of the light control sheet.

13. The surface light emitter of claim 12, wherein a shape of a longitudinal section of the depressions is a triangle, a trapezoid or an arc.

14. The surface light emitter of claim 12, wherein a depth of the depressions is the same as a thickness of the light control sheet.

15. The surface light emitter of claim 12, wherein the transparent material is air.

16. The surface light emitter of claim 12, wherein the transparent material is ultraviolet curable resin.