Title:
LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/157602
Kind Code:
A1
Abstract:
This lighting device is provided with: a light source that emits light; a dimmer device that has at least one liquid-crystal panel on the light-output side of the light source, and that controls the transmittance of light transmitted through the liquid crystal panel and the transmission range of the light transmitted through the liquid crystal panel, thereby adjusting the light distribution range of light emitted externally from the liquid crystal panel; a temperature sensor that acquires information indicating the temperature of the liquid crystal panel; a heating unit that heats the liquid crystal panel; and a control unit that causes the heating unit to operate if information that indicates a temperature below a prescribed temperature is acquired by the temperature sensor.
Inventors:
TAKAHATA MASASHI (JP)
IKENO KOZO (JP)
IKENO KOZO (JP)
Application Number:
PCT/JP2023/002518
Publication Date:
August 24, 2023
Filing Date:
January 26, 2023
Export Citation:
Assignee:
JAPAN DISPLAY INC (JP)
International Classes:
F21V23/00; F21S2/00; F21V29/90; G02F1/13; H05B45/10; H05B45/325; F21Y115/10
Foreign References:
| JP2007286611A | 2007-11-01 | |||
| JP2010039247A | 2010-02-18 | |||
| JP2010122435A | 2010-06-03 | |||
| JP2011508909A | 2011-03-17 | |||
| JP2009008941A | 2009-01-15 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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