Title:
DISPLAY DEVICE AND COLOUR SPACE EXPANSION METHOD
Document Type and Number:
WIPO Patent Application WO/2017/051768
Kind Code:
A1
Abstract:
The purpose of the present invention is to achieve a display device capable of expanding a colour space, without increasing the size of an IC, increasing costs, and causing display problems. A signal processing circuit (100) is provided with: a signal separation unit (110) which separates an input video signal into components of each colour; an expanded video signal generation unit (130) which performs expansion processing for increasing the signal value of the input video signal, and outputs, as an expanded video signal, data obtained as a result of the expansion processing; an expansion coefficient determination unit (120) which determines an expansion coefficient E used in the expansion processing; and an output video signal generation unit (140) which generates, on the basis of the expanded video signal, an output video signal to be outputted to a display panel. The expansion coefficient determination unit (120) sets the inverse of the chrominance as the expansion coefficient E for pixels having a chrominance equal to or more than a prescribed value, and determines the expansion coefficient (E) for pixels having a chrominance equal to or less than the prescribed value, on the basis of a quadratic function which uses chrominance as a parameter.
Inventors:
YASHIKI MASAFUMI
KOIZUMI RYOHEI
KOIZUMI RYOHEI
Application Number:
PCT/JP2016/077365
Publication Date:
March 30, 2017
Filing Date:
September 16, 2016
Export Citation:
Assignee:
SHARP KK (JP)
International Classes:
G09G3/36; G02F1/133; G09G3/20; G09G5/00; G09G5/02; G09G5/36; H04N9/64; H04N9/68; H04N9/77
Domestic Patent References:
| WO2015025575A1 | 2015-02-26 |
Foreign References:
| JP2014139647A | 2014-07-31 | |||
| JP2014206750A | 2014-10-30 | |||
| JP2014006328A | 2014-01-16 |
Attorney, Agent or Firm:
SHIMADA, Akihiro (JP)
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