| 摘要 |
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). |
| 主权项 |
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 ΔX, 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 ΔY, 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 ΔX1, 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 ΔY1, the another side being the side that can be directly projected on the y-axis, and that 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 ΔX2, 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 ΔY2, the another side being the side that can be directly projected on the y-axis, the adjacent dot light sources satisfy relationships
ΔX1+ΔX2=ΔX×2andΔY1+ΔY2=ΔY×2 so 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. |
