Title:
PROJECTION TYPE DISPLAY DEVICE AND METHOD OF CONTROLLING PROJECTION TYPE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/092807
Kind Code:
A1
Abstract:
Disclosed is a projection type display device comprising a reflection type image forming element (130), provided with a plurality of micro-mirrors actuated either ON or OFF in accordance with the video signal in one frame, which reflects the illumination from the ON actuated micro-mirrors and forms a projection image; a transmission type panel (14), configured to have variable transmissivity, which transmits OFF light from the OFF actuated micro-mirrors and outputs said OFF light as return light; a light source (110); an optical element (150) which irradiates onto the reflection type image forming element (130) a uniform distribution of the light that results from focusing the return light and the light from the light source; and a control unit (20) which stores a predetermined standard value as an initial value, compares the standard value and the absolute value of the difference in the luminance of the OFF light between the current frame and the next frame, determines the luminance of the OFF light in the next frame in order for the absolute value to become smaller than the standard value if the absolute value is larger than the standard value, and in order to obtain return light of the determined luminance, changes the transmissivity of the transmission type panel (14) and updates the standard value to a value based on the return light in the next frame.
Inventors:
MYO THAN HTAY (JP)
Application Number:
PCT/JP2010/051032
Publication Date:
August 04, 2011
Filing Date:
January 27, 2010
Export Citation:
Assignee:
NEC DISPLAY SOLUTIONS LTD (JP)
MYO THAN HTAY (JP)
MYO THAN HTAY (JP)
International Classes:
G03B21/00
Domestic Patent References:
| WO2009034694A1 | 2009-03-19 |
Foreign References:
| JP2003121784A | 2003-04-23 | |||
| JP2004138986A | 2004-05-13 | |||
| JPH1082959A | 1998-03-31 | |||
| JP2000171737A | 2000-06-23 |
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (JP)
Akio Miyazaki (JP)
Akio Miyazaki (JP)
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