Backlight unit, display device, and electronic device

摘要

A novel structure of a backlight unit where color-scan backlight drive is performed and a color mixture problem can be reduced is proposed. In the backlight unit where color-scan backlight drive is performed, in order not to form a color mixture region by light from a light source, an optical system is provided between the light source and a diffuser sheet so that the light is isotropically spread. Specifically, the distribution of intensity of light in the minor-axis direction is narrowed by the optical system provided between the light source and the diffuser sheet. The distribution of intensity of light in the major-axis direction is made uniform by the optical system. Further, the spread of light from the light source in the minor-axis direction in which a color mixture region is formed is suppressed and luminance on a light-emitting surface in the major-axis direction is made uniform.

主权项

1. A backlight unit comprising:
a light source portion comprising a plurality of zonal light source regions; and an optical system adjacent to the light source portion, wherein each of the plurality of zonal light source regions comprises a plurality of light sources of a plurality of colors, wherein the plurality of light sources are arranged in matrix, wherein one of the plurality of zonal light source regions is configured to emit a first light in a period, and a region adjacent to the one of the plurality of zonal light source regions is configured to emit a second light in the period, wherein a color of the first light is different from a color of the second light, and wherein the optical system is configured to narrow a distribution of intensity of a light emitted from each of the plurality of zonal light source regions in a minor-axis direction in any one of the plurality of zonal light source regions.