Title:
投写型画像表示装置
Document Type and Number:
Japanese Patent JP5750572
Kind Code:
B2
Abstract:
A projection image display device has a plurality of light sources, a phosphor layer that emits light through excitation by at least any one of the light sources, an optical section, a temperature detector, a light-source intensity controller, an amplitude controller, a luminance controller. The optical section determines an optical path of light emitted from the light sources and the phosphor layer. The temperature detector directly or indirectly detects temperature of the phosphor layer or of the periphery of the phosphor layer. The light-source intensity controller controls intensity of an excitation light source that excites the phosphor layer. The amplitude controller controls the amplitude of a projection image signal. The luminance controller controls luminance of projection images by switching the light-source intensity controller and the amplitude controller according to a detected temperature.
Inventors:
Takayuki Kimoto
Takaaki Gyoten
Hiroshi Kitano
Takaaki Gyoten
Hiroshi Kitano
Application Number:
JP2011055114A
Publication Date:
July 22, 2015
Filing Date:
March 14, 2011
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
G09G3/34; G02F1/13; G02F1/133; G02F1/13357; G03B21/00; G03B21/14; G09G3/20; H04N5/74
Domestic Patent References:
| JP11129525A | ||||
| JP2009277516A | ||||
| JP2007156270A | ||||
| JP2008052070A | ||||
| JP2009282187A |
Attorney, Agent or Firm:
Kentaro Fujii
Kenji Kamada
Hiroo Maeda
Kenji Kamada
Hiroo Maeda