PIXEL ARRAY, ELECTRO OPTICAL DEVICE, ELECTRIC APPARATUS AND METHOD OF DRIVING PIXEL ARRAY

• US 20160203748A1
• Filed: 01/14/2016
• Published: 07/14/2016
• Est. Priority Date: 01/14/2015
• Status: Active Grant

• Current Assignee: Tianma Microelectronics Company Limited
• Original Assignee: NLT Technologies, Ltd.
• Inventors: MATSUEDA, Yojiro, TAKATORI, Kenichi
• Granted Patent: US 9,858,847 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• 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 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/2074 using sub-pixels
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/352 the areas of the RGB subpixels being different
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels

Abstract

In a pixel array, pixels are two-dimensionally arranged, each of the pixels including a subpixel of the first color having a highest luminosity factor, a subpixel of the second color and a subpixel of the third color having a lowest luminosity factor. A circuit element in each of subpixels of the first color to the third color in each of the pixels is arranged in a row direction. A light emitting region of a subpixel of the first color and a light emitting region of a subpixel of the second color are arranged in the first direction inclined to the row direction. A light emitting region of a subpixel of the third color is arranged in the second direction orthogonal to the first direction, with respect to the light emitting region of the subpixel of the first color and the light emitting region of the subpixel of the second color.

Claims

1. A pixel array, in which pixels are two-dimensionally arranged, each of the pixels being constituted by a subpixel of a first color having a highest luminosity factor, a subpixel of a second color and a subpixel of a third color having a lowest luminosity factor, the pixel array comprising:

a circuit element in each of subpixels of the first color, the second color and the third color in each of the pixels arranged in a row direction;

a light emitting region of a subpixel of the first color and a light emitting region of a subpixel of the second color arranged in a first direction inclined to the row direction;

a light emitting region of a subpixel of the third color arranged in a second direction orthogonal to the first direction, with respect to the light emitting region of the subpixel of the first color and the light emitting region of the subpixel of the second color; and

a data line extending in a column direction and connected to a circuit element in each of the subpixels,

wherein the data line connected to circuit elements in subpixels of two colors of the first color and the second color, the data line connected to circuit elements in subpixels of two colors of the second color and the third color, and the data line connected to circuit elements in subpixels of two colors of the third color and the first color are repeatedly arranged.

2. The pixel array according to claim 1, wherein

each of the data lines is connected to a circuit element in a subpixel of a former color of the two colors in an odd-numbered column, and is connected to a circuit element in a subpixel of a latter color of the two colors in an even-numbered column.

3. The pixel array according to claim 2, wherein

a circuit element in a subpixel of the second color, a circuit element in a subpixel of the first color, a circuit element in a subpixel of the third color are arranged in this order in the row direction,

the data line connected to a circuit element in a subpixel of the second color in an odd-numbered column is connected to a circuit element in a subpixel of the third color in an even-numbered column,

the data line connected to a circuit element in a subpixel of the first color in an odd-numbered column is connected to a circuit element in a subpixel of the second color in an even-numbered column, and

the data line connected to a circuit element in a subpixel of the third color in an odd-numbered column is connected to a circuit element in a subpixel of the first color in an even-numbered column.

4. The pixel array according to claim 1, wherein

a boundary of an image is displayed by combining one subpixel of the first color, one subpixel of the second color and one subpixel of the third color in each of two pixels adjacent to each other in the first direction or the second direction.

5. The pixel array according to claim 4, wherein

a combination of subpixels of three colors in the two pixels is changed in accordance with an extending direction of the boundary of the image.

6. The pixel array according to claim 1, wherein

the light emitting region of the subpixel of the first color and the light emitting region of the subpixel of the second color are displaced toward a side of the subpixel of the first color along the first direction with respect to a line in the second direction running through a center of the light emitting region of the subpixel of the third color.

7. The pixel array according to claim 1, wherein

the first color is G (Green), the second color is R (Red) and the third color is B (Blue).

8. An electro optical device, comprising:

the pixel array according to claim 1; and

a circuit part driving the pixel array.

9. An electric apparatus, comprising, as a display device, an organic electroluminescence device in which the pixel array according to claim 1 including an organic electroluminescence material in the light emitting region and a circuit part driving the pixel array are formed on a substrate.

10. A method of driving a pixel array in which pixels are two-dimensionally arranged, each of the pixels being constituted by a subpixel of a first color having a highest luminosity factor, a subpixel of a second color and a subpixel of a third color having a lowest luminosity factor,

wherein

a light emitting region of a subpixel of the first color and a light emitting region of a subpixel of the second color are arranged in a first direction inclined to a side of a display region, and

a light emitting region of a subpixel of the third color is arranged in a second direction orthogonal to the first direction, with respect to the light emitting region of the subpixel of the first color and the light emitting region of the subpixel of the second color,

the method comprising:

categorizing drive patterns for the pixels into a first pattern in which all of a subpixel of the first color, a subpixel of the second color and a subpixel of the third color are turned on, a second pattern in which a subpixel of the first color and a subpixel of the second color are turned on, a third pattern in which a subpixel of the first color and a subpixel of the third color are turned on, a fourth pattern in which a subpixel of the second color and a subpixel of the third color are turned on, a fifth pattern in which a subpixel of the first color is turned on, a sixth pattern in which a subpixel of the second color is turned on, and a seventh pattern in which a subpixel of the third color is turned on;

deciding a combination of patterns corresponding to a plurality of pixels adjacent to each other in the first direction or the second direction near a boundary of the image, depending on an image to be displayed in the display region; and

driving the plurality of pixels with a decided combination of patterns.

11. The method of driving a pixel array according to claim 10, comprising

driving two pixels adjacent to each other in the first direction or the second direction near the boundary, with a combination of the second pattern and the seventh pattern, a combination of the third pattern and the sixth pattern, or a combination of the fourth pattern and the fifth pattern.

12. The method of driving a pixel array according to claim 10, comprising

driving three pixels adjacent to one another in the first direction or the second direction near the boundary, with a combination of the first pattern, the second pattern and the seventh pattern, a combination of the first pattern, the third pattern and the sixth pattern, or a combination of the first pattern, the fourth pattern and the fifth pattern.

13. The method of driving a pixel array according to claim 10, wherein

the first color is G (Green), the second color is R (Red) and the third color is B (Blue).