Title:
IMAGE PROCESSING DEVICE, DISPLAY DEVICE, AND IMAGE PROCESSING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/155760
Kind Code:
A1
Abstract:
The present invention reduces narrowing of a color gamut of a low gradation region in a liquid crystal panel and improves image quality thereof. To this end, a color image signal for a liquid crystal display panel in which a display image is generated by light that has passed through a rear liquid crystal cell and a front liquid crystal cell is converted to a monochrome image signal by using a predetermined coefficient. In addition, gradation value conversion is performed for the obtained monochrome image signal so as to be a signal performing gradation expression on a gradation region set as a gradation range in which a color gamut change is great when the front liquid crystal cell is driven by the color image signal, thereby generating a rear image signal that is a monochrome image signal for the rear liquid crystal cell. Further, a calculation process using the rear image signal for the color image signal is performed to generate a front image signal that is the color image signal for the front liquid crystal cell.
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Inventors:
KIMURA HIROAKI (JP)
Application Number:
PCT/JP2018/045877
Publication Date:
August 15, 2019
Filing Date:
December 13, 2018
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
G09G3/36; G02F1/133; G02F1/1333; G09G3/20
Domestic Patent References:
| WO2008114521A1 | 2008-09-25 | |||
| WO2008117643A1 | 2008-10-02 |
Foreign References:
| JP2014517931A | 2014-07-24 | |||
| JP2016118685A | 2016-06-30 | |||
| JP2009276425A | 2009-11-26 | |||
| JP2018084760A | 2018-05-31 | |||
| JP2015191053A | 2015-11-02 |
Other References:
See also references of EP 3751553A4
Attorney, Agent or Firm:
IWATA, Masanobu et al. (JP)
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