Display device

• US 10,573,667 B2
• Filed: 12/01/2016
• Issued: 02/25/2020
• Est. Priority Date: 12/11/2015
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Ikeda, Hisao, Toyotaka, Kouhei, Shishido, Hideaki, Miyake, Hiroyuki, Yokoyama, Kohei, Jinbo, Yasuhiro, Dozen, Yoshitaka, Nagata, Takaaki, Hirasa, Shinichi
• Primary Examiner(s): Cao, Phat X
• Application Number:
  US15/366,255
• Publication Number:
  US 20170170200A1
• Time in Patent Office: 1,181 Days
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• 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 2300/0465 Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2320/0295 by monitoring each display pixel
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2320/0693 Calibration of display systems
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 5/391 Resolution modifying circuits, e.g. variable screen formats
• CPC Class Codes: H01L 27/1225 with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1266 the substrate on which the devices are formed not being the final device substrate, e.g. using a temporary substrate
• CPC Class Codes: H01L 29/78648 arranged on opposing sides of the channel
• 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

Provided is a display device with extremely high resolution, a display device with higher display quality, a display device with improved viewing angle characteristics, or a flexible display device. Same-color subpixels are arranged in a zigzag pattern in a predetermined direction. In other words, when attention is paid to a subpixel, another two subpixels exhibiting the same color as the subpixel are preferably located upper right and lower right or upper left and lower left. Each pixel includes three subpixels arranged in an L shape. In addition, two pixels are combined so that pixel units including subpixel are arranged in matrix of 3×2.

Claims

1. A display device comprising:

a plurality of pixel units, and

a fourth wiring, a fifth wiring and a sixth wiring,

wherein the plurality of pixel units is arranged in a matrix in a first direction and a second direction intersecting the first direction,

wherein each of the plurality of pixel units comprises first to sixth subpixels,

wherein the first to sixth subpixels comprise first to sixth display elements, respectively,

wherein the first to sixth subpixels comprise first to sixth transistors, respectively,

wherein the first display element, the third display element, and the fifth display element are arranged in the first direction in this order,

wherein the second display element, the fourth display element, and the sixth display element are arranged in the first direction in this order,

wherein the first display element and the second display element are arranged in the second direction,

wherein the third display element and the fourth display element are arranged in the second direction,

wherein the fifth display element and the sixth display element are arranged in the second direction,

wherein the first display element and the fourth display element are display elements exhibiting a first color,

wherein the second display element and the fifth display element are display elements exhibiting a second color,

wherein the third display element and the sixth display element are display elements exhibiting a third color,

wherein each of the first transistor and the fourth transistor is electrically connected to the fourth wiring,

wherein each of the third transistor and the sixth transistor is electrically connected to the fifth wiring, and

wherein the fifth transistor is electrically connected to the sixth wiring.

2. The display device according to claim 1, further comprising:

a first wiring; and

a second wiring,

wherein a gate of the first transistor, a gate of the third transistor, and a gate of the fifth transistor are electrically connected to the first wiring, and

wherein a gate of the second transistor, a gate of the fourth transistor, and a gate of the sixth transistor are electrically connected to the second wiring.

3. The display device according to claim 1,

wherein a pitch of each of the plurality of pixel units in the first direction is twice a pitch of each of the plurality of pixel units in the second direction.

4. The display device according to claim 3,

wherein the pitch of each of the plurality of pixel units in the first direction is larger than or equal to 12 μ

m and smaller than or equal to 150 μ

m.

5. The display device according to claim 1,

wherein the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are top-gate transistors.

6. The display device according to claim 5, further comprising:

a seventh transistor electrically connected to the first display element,

wherein the seventh transistor comprises two gate electrodes between which a semiconductor layer is provided.

7. The display device according to claim 1, further comprising a third wiring,

wherein the second transistor in the second subpixel at an edge of a pixel portion is electrically connected to the third wiring.

8. A display device comprising:

a plurality of subpixels,

a fourth wiring, a fifth wiring and a sixth wiring,

a plurality of first display elements exhibiting a first color;

a plurality of second display elements exhibiting a second color;

a plurality of third display elements exhibiting a third color;

a plurality of first rows extending in a first direction;

a plurality of second rows extending in the first direction; and

a plurality of third rows extending in the first direction,

wherein each of the plurality of subpixels comprises a transistor,

wherein the first row, the second row, and the third row are arranged in this order in a second direction intersecting the first direction,

wherein each of the plurality of first rows is a row in which the first display element and the second display element are alternately arranged,

wherein each of the plurality of second rows is a row in which the third display element and the first display element are alternately arranged,

wherein each of the plurality of third rows is a row in which the second display element and the third display element are alternately arranged,

wherein the first display element in the first row, the third display element in the second row, and the second display element in the third row are arranged in the second direction,

wherein the transistor in the subpixel which comprises the first display element in the first row is electrically connected to the fourth wiring,

wherein the transistor in the subpixel which comprises the first display element in the second row is electrically connected to the fourth wiring,

wherein the transistor in the subpixel which comprises the third display element in the second row is electrically connected to the fifth wiring,

wherein the transistor in the subpixel which comprises the third display element in the third row is electrically connected to the fifth wiring, and

wherein the transistor in the subpixel which comprises the second display element in the third row is electrically connected to the sixth wiring.

9. The display device according to claim 8, further comprising:

a scan line,

wherein the first direction is a direction parallel to an extending direction of one of the fourth wiring, the fifth wiring and the sixth wiring, and

wherein the second direction is a direction parallel to an extending direction of the scan line.

10. The display device according to claim 8, further comprising a third wiring,

wherein the transistor in the subpixel which comprises the second display element in the first row at an edge of a pixel portion is electrically connected to the third wiring.

11. A display device comprising:

a plurality of first display elements exhibiting a first color;

a plurality of second display elements exhibiting a second color;

a plurality of third display elements exhibiting a third color;

a first row extending in a first direction;

a second row extending in the first direction;

a third row extending in the first direction; and

a fourth row extending in the first direction,

wherein the first row, the second row, the third row, and the fourth row are arranged in this order in a second direction intersecting the first direction,

wherein the first display element, the third display element, and the second display element are arranged in this order in each of the first row and the fourth row,

wherein the second display element, the first display element, and the third display element are arranged in this order in each of the second row and the third row,

wherein the first display element in the first row, the second display element in the second row, the second display element in the third row, and the first display element in the fourth row are aligned in the second direction, and

wherein an arrangement of a plurality of display elements does not include a delta arrangement.

12. The display device according to claim 11, further comprising:

a signal line; and

a scan line,

wherein the first direction is a direction parallel to an extending direction of one of the signal line and the scan line, and

wherein the second direction is a direction parallel to an extending direction of the other of the signal line and the scan line.

13. The display device according to claim 11, further comprising:

a plurality of first subpixels;

a plurality of second subpixels;

a plurality of third subpixels;

a first wiring; and

a second wiring,

wherein each of the plurality of first subpixels comprises a first transistor and the first display element,

wherein each of the plurality of second subpixels comprises a second transistor and the second display element,

wherein each of the plurality of third subpixels comprises a third transistor and the third display element,

wherein a gate of the first transistor in the first row, a gate of the third transistor in the first row and a gate of the second transistor in the first row are electrically connected to the first wiring, and

wherein a gate of the second transistor in the second row, a gate of the first transistor in the second row and a gate of the third transistor in the second row are electrically connected to the second wiring.

14. The display device according to claim 13, further comprising:

a fourth wiring;

a fifth wiring; and

a sixth wiring,

wherein one of a source and a drain of the first transistor in each of the first row and the second row is electrically connected to the fourth wiring,

wherein one of a source and a drain of the third transistor in each of the first row and the second row is electrically connected to the fifth wiring, and

wherein one of a source and a drain of the second transistor in the first row is electrically connected to the sixth wiring.

15. An electronic device comprising:

the display device according to claim 11; and

an operation key.

16. The display device according to claim 14, further comprising a third wiring,

wherein one of a source and a drain of the second transistor in the second row at an edge of a pixel portion is electrically connected to the third wiring.