Two-sided-emission-type back light unit and display using said back light unit
AssigneeCitizen Electronics Co., Ltd.
InventorsKiyokazu Watanabe, Daisaku Okuwaki
Life of this patent
Estimating the term…
Abstract
A back light unit including a light source, a light guiding plate having an entrance surface to receive light emitted from the light source, a first emission surface and a second emission surface, a semi-transmissive/reflective member disposed to face one of the first emission surface and the second emission surface, and a chromatic correcting member, the semi-transmissive/reflective member having an incident surface to receive light emitted from one of the first emission surface and the second emission surface and an exit surface, the chromatic correcting member being configured to correct chromaticity of light emitted from the exit surface of the semi-transmissive/reflective member and emit corrected light.
Claims9
A back light unit, comprising:
- a light source;
- a light guiding plate having an entrance surface that faces the light source to receive light emitted from the light source, a first emission surface and a second emission surface;
- a semi-transmissive/reflective member having an incident surface that faces at least one of the first emission surface and the second emission surface of the light guiding plate and an exit surface;
- and
- a chromatic correcting member disposed to face the exit surface of the semi-transmissive/reflective member, the chromatic correcting member including a white-type material that has a spectroscopic characteristic in a direction of blue.
Dependencies are inferred from the claim text.