LIGHT EMITTING MODULE, SURFACE LIGHT SOURCE, LIQUID CRYSTAL DISPLAY, AND ILLUMINATING DEVICE
First Claim
1. A light emitting module comprising:
- a substrate; and
a plurality of dot light sources placed on the substrate and configured to emit white light,wherein each of the dot light sources is classified into a chromaticity rank on CIE 1931 coordinates according to its chromaticity,one dot light source, out of adjacent dot light sources, belongs to a parallelogram-shaped first chromaticity rank area, and the other dot light source belongs to a parallelogram-shaped second chromaticity rank area,one side, or another side not in parallel with the one side, of each of the first and second chromaticity rank areas is parallel to one side, or another side not in parallel with the one side, of a parallelogram-shaped target chromaticity rank area,assuming that an x-coordinate difference that is a chromaticity coordinate difference of the one side of the target chromaticity rank area projected on the x-axis is Δ
X, the one side being on the side allowed be directly projected on the x-axis, and a y-coordinate difference that is a chromaticity coordinate difference of the another side of the target chromaticity rank area projected on the y-axis is Δ
Y, the another side being the side that can be directly projected on the y-axis,that an x-coordinate difference that is a chromaticity coordinate difference of the one side of the first chromaticity rank area projected on the x-axis is Δ
X1, the one side being the side that can be directly projected on the x-axis, and a y-coordinate difference that is a chromaticity coordinate difference of the another side of the first chromaticity rank area projected on the y-axis is Δ
Y1, the another side being the side that can be directly projected on the y-axis, andthat an x-coordinate difference that is a chromaticity coordinate difference of the one side of the second chromaticity rank area projected on the x-axis is Δ
X2, the one side being the side that can be directly projected on the x-axis, and a y-coordinate difference that is a chromaticity coordinate difference of the another side of the second chromaticity rank area projected on the y-axis is Δ
Y2, the another side being the side that can be directly projected on the y-axis,the adjacent dot light sources satisfy relationships
Δ
X1+Δ
X2=Δ
X×
2
and
Δ
Y1+Δ
Y2=Δ
Y×
2so that the resultant mixed color can fall within the target chromaticity rank area, andthe center of the first chromaticity rank area and the center of the second chromaticity rank area are axisymmetric with respect to a virtual straight line that passes through the center of the target chromaticity rank area and is parallel to the one side or the another side of the target chromaticity rank area.
1 Assignment
0 Petitions
Accused Products
Abstract
The purpose of the present invention is providing a light emitting module capable of emitting illumination light having a nearly uniform color tone as a whole. The invention also provides a surface light source having such light emitting modules, and a liquid crystal display and an illuminating device having such a surface light source.
In a light emitting module (50), adjacent dot light sources (17, 17) satisfy the relationships ΔX1+ΔX2=ΔX×2 and ΔY1+ΔY2=ΔY×2, so that the resultant mixed color can fall within a target chromaticity rank area (M), and the center (gc) of a first chromaticity rank area g and the center (Ec) of a second chromaticity rank area (E) are axisymmetric with respect to virtual straight lines (gE1, gE2) that pass through the center (Mc) of the target chromaticity rank area (M) and parallel to one side or another side of the target chromaticity rank area (M).
-
Citations
25 Claims
-
1. A light emitting module comprising:
-
a substrate; and a plurality of dot light sources placed on the substrate and configured to emit white light, wherein each of the dot light sources is classified into a chromaticity rank on CIE 1931 coordinates according to its chromaticity, one dot light source, out of adjacent dot light sources, belongs to a parallelogram-shaped first chromaticity rank area, and the other dot light source belongs to a parallelogram-shaped second chromaticity rank area, one side, or another side not in parallel with the one side, of each of the first and second chromaticity rank areas is parallel to one side, or another side not in parallel with the one side, of a parallelogram-shaped target chromaticity rank area, assuming that an x-coordinate difference that is a chromaticity coordinate difference of the one side of the target chromaticity rank area projected on the x-axis is Δ
X, the one side being on the side allowed be directly projected on the x-axis, and a y-coordinate difference that is a chromaticity coordinate difference of the another side of the target chromaticity rank area projected on the y-axis is Δ
Y, the another side being the side that can be directly projected on the y-axis,that an x-coordinate difference that is a chromaticity coordinate difference of the one side of the first chromaticity rank area projected on the x-axis is Δ
X1, the one side being the side that can be directly projected on the x-axis, and a y-coordinate difference that is a chromaticity coordinate difference of the another side of the first chromaticity rank area projected on the y-axis is Δ
Y1, the another side being the side that can be directly projected on the y-axis, andthat an x-coordinate difference that is a chromaticity coordinate difference of the one side of the second chromaticity rank area projected on the x-axis is Δ
X2, the one side being the side that can be directly projected on the x-axis, and a y-coordinate difference that is a chromaticity coordinate difference of the another side of the second chromaticity rank area projected on the y-axis is Δ
Y2, the another side being the side that can be directly projected on the y-axis,the adjacent dot light sources satisfy relationships
Δ
X1+Δ
X2=Δ
X×
2
and
Δ
Y1+Δ
Y2=Δ
Y×
2so that the resultant mixed color can fall within the target chromaticity rank area, and the center of the first chromaticity rank area and the center of the second chromaticity rank area are axisymmetric with respect to a virtual straight line that passes through the center of the target chromaticity rank area and is parallel to the one side or the another side of the target chromaticity rank area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
-
14. The light emitting module of claim 1,
wherein the substrate is long shaped, and the plurality of spot light sources are placed linearly along the length of the substrate. -
15. The light emitting module of claim 14,
wherein the plurality of spot light sources are placed on the substrate at equal intervals. -
16. The light emitting module of claim 1,
wherein the plurality of spot light sources have the same configuration. -
17. The light emitting module of claim 6,
wherein the one and other dot light sources of the adjacent dot light sources respectively belong to fifth and sixth chromaticity rank areas that are respectively at positions symmetric to the third and fourth chromaticity rank areas with respect to the center of the target chromaticity rank area and the same in shape as the third and fourth chromaticity rank areas. -
18. The light emitting module of claim 8,
wherein the one and other dot light sources of the adjacent dot light sources respectively belong to fifth and sixth chromaticity rank areas that are respectively at positions symmetric to the third and fourth chromaticity rank areas with respect to the center of the target chromaticity rank area and the same in shape as the third and fourth chromaticity rank areas. -
19. A surface light source including a first light emitting module that is the light emitting module of claim 6, a second light emitting module that is the light emitting module of claim 17, and a housing, the light emitting modules each having the plurality of dot light sources arranged in line on the substrate being placed in a matrix on the housing,
wherein the first light emitting module and the second light emitting module are placed adjacent to each other on the housing in a direction orthogonal to the direction of arrangement of the dot light sources. -
20. A surface light source including a third light emitting module that is the light emitting module of claim 7 and a housing, the light emitting modules each having the plurality of dot light sources arranged in line on the substrate being placed in a matrix on the housing,
wherein at least either one of light emitting modules adjacent in a direction orthogonal to the direction of arrangement of the dot light sources is the third light emitting module. -
21. A liquid crystal display comprising the surface light source of claim 19, an optical sheet, and a liquid crystal panel.
-
22. An illuminating device comprising the surface light source of claim 19 and a diffuser.
-
23. A surface light source including a first light emitting module that is the light emitting module of claim 8, a second light emitting module that is the light emitting module of claim 18, and a housing, the light emitting modules each having the plurality of dot light sources arranged in line on the substrate being placed in a matrix on the housing,
wherein the first light emitting module and the second light emitting module are placed adjacent to each other on the housing in a direction orthogonal to the direction of arrangement of the dot light sources. -
24. A liquid crystal display comprising the surface light source of claim 20, an optical sheet, and a liquid crystal panel.
-
25. An illuminating device comprising the surface light source of claim 20 and a diffuser.
Specification