Title:
DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/230884
Kind Code:
A1
Abstract:
Provided is a display device capable of precisely balancing synthesized light beams. A display device 1 comprises: a plurality of laser light sources 21 to 23 that emit a plurality of laser light beams B, R, and G; synthesis units 24 to 26 that synthesize the plurality of laser light beams B, R, and G; a collimator lens 41 that collimates the synthesized light beams: a liquid crystal panel 6 that forms an image for display; and a control unit 7 that controls the plurality of laser light sources 21 to 23. The liquid crystal panel 6 is illuminated using the collimated light beams. The display device 1 further comprises an optical detection unit 28 that detects the optical intensity of the laser light beams that have passed through the synthesis units 24 to 26. The control unit 7 performs periodic switching between an all-color lighting mode, in which all of the plurality of laser light sources 21 to 23 are turned on, and a single-color lighting mode, in which one of the plurality of laser light sources 21 to 23 is turned on. The control unit 7 causes the optical detection unit 28 to detect the optical intensity in the single-color lighting mode, and adjusts the gain of each of the laser light sources 21 to 23 in the all-color lighting mode on the basis of the value detected by the optical detection unit 28.
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Inventors:
TSURUMI HIDEAKI
Application Number:
PCT/JP2022/018906
Publication Date:
November 03, 2022
Filing Date:
April 26, 2022
Export Citation:
Assignee:
NIPPON SEIKI CO LTD (JP)
International Classes:
G02B27/01; B60K35/00; G02B27/48; G09G3/02; G09G3/36
Domestic Patent References:
| WO2016084470A1 | 2016-06-02 | |||
| WO2009142015A1 | 2009-11-26 |
Foreign References:
| JP2013020104A | 2013-01-31 | |||
| US6633301B1 | 2003-10-14 | |||
| JP2015049266A | 2015-03-16 |
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