BACKLIGHT UNIT AND DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce power consumption by improving light flux utilization efficiency while maintaining brightness and chromaticity uniformity in a backlight unit and a display device.

SOLUTION: The backlight unit comprises: a diffusion plate 12; a mounting substrate 3 disposed oppositely below the diffusion plate 12; a plurality of LED light sources 1 installed on the mounting surface of the mounting substrate 3; a plurality of insulating regular reflection sheets 14 arranged on the mounting surface by arranging the LED light sources 1 in first windows 14a opened at the centers; and diffusion reflection sheets 15 installed on the mounting surface and the insulating regular reflection sheets 14 by arranging the LED light sources 1 in second windows 15a opened at a plurality of portions, respectively. The diameter of the first window 14a is set to be smaller than that of the second window 15a, and the insulating regular reflection sheet 14 is exposed in the second window 15a.

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