DISPLAY DEVICE, METHOD FOR DRIVING DISPLAY DEVICE, AND ELECTRONIC APPARATUS

• US 20080224968A1
• Filed: 03/05/2008
• Published: 09/18/2008
• Est. Priority Date: 03/14/2007
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kashiwabara, Mitsuhiro
• Granted Patent: US 9,064,450 B2
• Time in Patent Office: Days
• US Class Current: 345/83
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]

Abstract

Disclosed herein is a display device including: a red pixel configured to be provided with a red light-emitting element that generates red light; a green pixel configured to be provided with a green light-emitting element that generates green light; and two blue pixels configured to be provided with blue light-emitting elements that generate blue light and have the same structure, wherein a color filter is provided on a light-extraction side of at least one of the two blue pixels so that blue light beams having different y-values in an xy chromaticity coordinate system are extracted from the two blue pixels.

Claims

1. A display device comprising:

a red pixel configured to be provided with a red light-emitting element that generates red light;

a green pixel configured to be provided with a green light-emitting element that generates green light; and

two blue pixels configured to be provided with blue light-emitting elements that generate blue light and have the same structure, wherein

a color filter is provided on a light-extraction side of at least one of the two blue pixels so that blue light beams having different y-values in an xy chromaticity coordinate system are extracted from the two blue pixels.

2. The display device according to claim 1, wherein

a chromaticity coordinate of blue light extracted from one of the two blue pixels is located in a direction toward a center among a chromaticity coordinate of red light extracted from the red pixel, a chromaticity coordinate of green light extracted from the green pixel, and a chromaticity coordinate of blue light extracted from the other of the two blue pixels.

3. The display device according to claim 1, wherein

each of the light-emitting elements is an organic electroluminescence element.

4. The display device according to claim 1, wherein

each of the light-emitting elements has a resonator structure that allows resonance of light of a respective one of colors.

5. A method for driving a display device including a red pixel provided with a red light-emitting element that generates red light, a green pixel provided with a green light-emitting element that generates green light, and two blue pixels provided with blue light-emitting elements that generate blue light and have the same structure, a color filter being provided on a light-extraction side of at least one of the two blue pixels so that blue light beams having different y-values in an xy chromaticity coordinate system are extracted from the two blue pixels, the method comprising:

driving only the red pixel, the green pixel, and one of the two blue pixels for displaying in which colors can be represented by these three pixels; and

driving the red pixel, the green pixel, and the two blue pixels only for displaying in which color representation is impossible unless these four pixels are used.

6. Electronic apparatus including a display panel, the display panel comprising:

a red pixel configured to be provided with a red light-emitting element that generates red light;

a green pixel configured to be provided with a green light-emitting element that generates green light;

two blue pixels configured to be provided with blue light-emitting elements that generate blue light and have the same structure, wherein

a color filter is provided on a light-extraction side of at least one of the two blue pixels so that blue light beams having different y-values in an xy chromaticity coordinate system are extracted from the two blue pixels.