Display device, driving method of display device, and electronic apparatus

Patent metadata

Field	Value
Publication number	US-9324283-B2
Application number	US-201314086476-A
Country	US
Kind code	B2
Filing date	Nov 21, 2013
Priority date	Dec 19, 2012
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

According to an aspect, a display device includes a first sub-pixel, a second sub-pixel, a third sub-pixel; and a fourth sub-pixel. A signal obtained based on at least an input signal for the first sub-pixel and an extension coefficient is supplied to the first sub-pixel. A signal obtained based on at least an input signal for the second sub-pixel and the extension coefficient is supplied to the second sub-pixel. A signal obtained based on at least an input signal for the third sub-pixel and the extension coefficient is supplied to the third sub-pixel. A signal obtained based on at least the input signal for the first sub-pixel, the input signal for the second sub-pixel, the input signal for the third sub-pixel, and the extension coefficient is supplied to the fourth sub-pixel. The extension coefficient varies based on at least a saturation of the input signals.

First claim

The invention is claimed as follows:

1. A display device comprising:
a first sub-pixel;
a second sub-pixel;
a third sub-pixel;
a fourth sub-pixel, and
a processing unit,
wherein
a signal obtained based on at least an input signal for the first sub-pixel and an extension coefficient is supplied to the first sub-pixel,
a signal obtained based on at least an input signal for the second sub-pixel and the extension coefficient is supplied to the second sub-pixel,
a signal obtained based on at least an input signal for the third sub-pixel and the extension coefficient is supplied to the third sub-pixel,
a signal obtained based on at least the input signal for the first sub-pixel, the input signal for the second sub-pixel, the input signal for the third sub-pixel, and the extension coefficient is supplied to the fourth sub-pixel,
the extension coefficient is configured to vary based on at least a saturation of the input signals, and
the processing unit is configured to switch between a first display mode in which the extension coefficient is changed based on the saturation of the input signals and a second display mode in which the extension coefficient is kept at a constant value regardless of the saturation of the input signals.

2. The display device according to claim 1 , wherein the switching is made between the first display mode and the second display mode based on the hue of the input signals.

3. The display device according to claim 2 , wherein the first display mode is selected when the hue of the input signals is yellow, and the second display mode is selected when the hue of the input signals is other than yellow.

4. A driving method of a display device that comprises a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, the driving method comprising:
supplying a signal obtained based on at least an input signal for the first sub-pixel and an extension coefficient to the first sub-pixel;
supplying a signal obtained based on at least an input signal for the second sub-pixel and the extension coefficient to the second sub-pixel;
supplying a signal obtained based on at least an input signal for the third sub-pixel and the extension coefficient to the third sub-pixel;
supplying a signal obtained based on at least the input signal for the first sub-pixel, the input signal for the second sub-pixel, the input signal for the third sub-pixel, and the extension coefficient to the fourth sub-pixel;
changing the extension coefficient based on at least a saturation of the input signals; and
switching between a first display mode in which the extension coefficient changes based on the saturation of the input signals and a second display mode in which the extension coefficient is kept at a constant value regardless of the saturation of the input signals.

5. The driving method of a display device according to claim 4 , wherein the switching is made between the first display mode and the second display mode based on the hue of the input signals.

6. The driving method of a display device according to claim 5 , wherein the first display mode is selected when the hue of the input signals is yellow, and the second display mode is selected when the hue of the input signals is other than yellow.

Assignees

• Japan Display Inc

Inventors

• Kabe Masaaki
• Nagatsuma Toshiyuki
• Higashi Amane
• Ikeda Kojiro
• Kurokawa Tae
• Mitsui Masashi
• Uchiyama Hiroki
• Tatsuno Hirokazu
• Goto Fumitaka
• Sakaigawa Akira

Classifications

• G09G2320/0242

  Compensation of deficiencies in the appearance of colours · CPC title

• G09G3/3607 Primary

  for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127) · CPC title

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title

• G09G3/2003

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title

• G09G3/3648

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title