Title:
LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/190602
Kind Code:
A1
Abstract:
The present invention is configured in the manner described below. A lighting device that has disposed therein a light guide plate 10, a plurality of LEDs 40, a prism sheet 30 on the upper surface side of the light guide plate 10, and a reflective sheet 20 on the lower surface side of the light guide plate 10. The lighting device is characterized by: the plurality of LEDs 40 being arranged in a first direction along a first side of the light guide plate 10, on the side surface corresponding to the first side; a first prism array of the prism sheet 30 being formed on a surface facing the light guide plate 10; a prism in the first prism array extending in the first direction, being arranged in a second direction that is orthogonal to the first direction, and having a diffusion sheet 50 between the upper surface of the light guide plate 10 ad the prism sheet 30; the haze value of the diffusion sheet 50 being 30%–65% when measured according to JIS K7361; and the apex angle of the prism in the first prism array being 55–66°.
Inventors:
OKADA MASAFUMI (JP)
HASEGAWA MAKOTO (JP)
SUZUKI NOBUYUKI (JP)
HASEGAWA MAKOTO (JP)
SUZUKI NOBUYUKI (JP)
Application Number:
PCT/JP2022/000194
Publication Date:
September 15, 2022
Filing Date:
January 06, 2022
Export Citation:
Assignee:
JAPAN DISPLAY INC (JP)
International Classes:
F21S2/00; F21Y115/10
Domestic Patent References:
| WO2004104658A1 | 2004-12-02 |
Foreign References:
| JP2000348515A | 2000-12-15 | |||
| JP2009158468A | 2009-07-16 | |||
| JP2010526333A | 2010-07-29 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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