IP Library › Granted Patent US 11,367,394

Granted Patent B2

US 11,367,394 · App. 17/262,466 · Granted Jun 21, 2022

Display device

Inventor: Shigetsugu Yamanaka (Sakai, JP)

Assignee: SHARP KABUSHIKI KAISHA

G09G3/3233 G09G3/3266 G09G3/3275 H01L27/3218 H01L27/3262 H01L27/3276 G09G2300/0426 G09G2300/0452

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Quick Facts

Patent No.: US 11,367,394
App. No.: 17/262,466
Granted: Jun 21, 2022
Kind: B2

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Abstract

A display device includes a plurality of sub-pixels. Each sub-pixel includes a light-emitting element, a write transistor connected to a data signal line, and a drive transistor that controls a current that flows through the light-emitting element. The plurality of sub-pixels arranged along a first data signal line include adjacent sub-pixels that emit different colors of light, and each include the write transistor having a conduction terminal electrically connected to the first data signal line. The plurality of sub-pixels arranged along a second data signal line include adjacent sub-pixels that emit different colors of light, and each include the write transistor having a conduction terminal electrically connected to the second data signal line.

Claims (97)

1. A display device comprising:

a plurality of data signal lines;

a plurality of scan signal lines; and

a plurality of sub-pixels,

each of the plurality of sub-pixels including

a light-emitting element,

a write transistor connected to one of the plurality of data signal lines, and

a drive transistor configured to control a current that flows through the light-emitting element,

wherein the plurality of data signal lines include

a first data signal line,

a second data signal line adjacent to the first data signal line,

a third data signal line adjacent to the second data signal line, and

a fourth data signal line adjacent to the third data signal line,

the plurality of sub-pixels arranged along the first data signal line include adjacent sub-pixels that emit different colors of light, and each include the write transistor having a conduction terminal electrically connected to the first data signal line,

the plurality of sub-pixels arranged along the second data signal line include adjacent sub-pixels that emit different colors of light, and each include the write transistor having a conduction terminal electrically connected to the second data signal line,

the plurality of sub-pixels arranged along the third data signal line include adjacent sub-pixels that emit different colors of light, and each include the write transistor having a conduction terminal electrically connected to the third data signal line,

the plurality of sub-pixels arranged along the fourth data signal line include adjacent sub-pixels that emit different colors of light, and each include the write transistor having a conduction terminal electrically connected to the fourth data signal line,

the first data signal line is electrically connected to the conduction terminal of the write transistor of the sub-pixel that emits a first color of light and the conduction terminal of the write transistor of the sub-pixel that emits a second color of light,

the second data signal line is electrically connected to the conduction terminal of the write transistor of the sub-pixel that emits the first color of light and the conduction terminal of the write transistor of the sub-pixel that emits a third color of light,

the third data signal line is electrically connected to the conduction terminal of the write transistor of the sub-pixel that emits the second color of light and the conduction terminal of the write transistor of the sub-pixel that emits the third color of light,

the fourth data signal line is electrically connected to the conduction terminal of the write transistor of the sub-pixel that emits the first color of light and the conduction terminal of the write transistor of the sub-pixel that emits the second color of light,

the sub-pixel connected to the first data signal line and emitting the first color of light is adjacent to the sub-pixel connected to the second data signal line and emitting the first color of light,

the sub-pixel connected to the third data signal line and emitting the second color of light is adjacent to the sub-pixel connected to the fourth data signal line and emitting the second color of light,

the sub-pixel connected to the second data signal line and emitting the third color of light is adjacent to the sub-pixel connected to the third data signal line and emitting the third color of light, and

the light-emitting element included in the sub-pixel connected to the first data signal line and emitting the first color of light has a first electrode electrically connected to a first electrode of the light-emitting element included in the sub-pixel connected to the second data signal line and emitting the first color of light.

2. The display device according to claim 1 , wherein

the light-emitting element included in the sub-pixel connected to the first data signal line and emitting the first color of light has a first electrode electrically connected, via a transistor, to a first electrode of the light-emitting element included in the sub-pixel connected to the second data signal line and emitting the first color of light.

3. A display device comprising:

a plurality of data signal lines extending in a column direction;

a plurality of scan signal lines extending in a row direction; and

a plurality of sub-pixels arranged in matrix,

each of the plurality of sub-pixels including

a light-emitting element,

a write transistor connected to one of the plurality of data signal lines, and

a drive transistor configured to control a current that flows through the light-emitting element,

each of the plurality of sub-pixels being connected to one of the plurality of scan signal lines,

wherein the plurality of sub-pixels that emit different colors of light are connected to each of the plurality of scan signal lines,

the plurality of sub-pixels that emit different colors of light are connected to each of the plurality of data signal lines,

the plurality of sub-pixels connected to each of the plurality of data signal lines emit two colors of light,

each of the plurality of scan signal lines is connected to a sub-pixel row comprising the plurality of sub-pixels arranged in the row direction,

each of the plurality of data signal lines is connected to a sub-pixel column comprising the plurality of sub-pixels arranged in the column direction,

the sub-pixel column comprising the plurality of sub-pixels of a first color and the plurality of sub-pixels of a second color is adjacent to the sub-pixel column comprising the plurality of sub-pixels of the second color and the plurality of sub-pixels of a third color,

each of the sub-pixel rows includes a plurality of dots of a plurality of colors arranged in the row direction, each of the plurality of dots comprising the plurality of sub-pixels of the same color sequentially arranged in the row direction,

two of the plurality of sub-pixels adjacent to each other in the column direction emit different colors of light,

each of the sub-pixel rows includes the plurality of dots periodically arranged in the row direction for each cycle comprising three colors of the plurality of dots sequentially arranged, and

two of the sub-pixel rows adjacent to each other have phases shifted from each other by a half of the cycle, the phases each indicating an order of dot color.

4. The display device according to claim 3 , wherein the plurality of sub-pixels connected to each of the plurality of data signal lines emit three colors of light.

5. The display device according to claim 3 , wherein each of the plurality of sub-pixels of the third color displaying a maximum gradation is applied with a data signal having a voltage equal to a voltage of a data signal applied across each of the plurality of sub-pixels of the first color displaying the maximum gradation.

6. The display device according to claim 5 , wherein the drive transistor of each of the plurality of sub-pixels of the third color has a greater ratio of a channel width to a channel length than the drive transistor of each of the plurality of sub-pixels of the first color.

7. The display device according to claim 3 , wherein a distance between centers of gravity of the plurality of dots of the same color closest to each other is identical with regard to the first, second, and third colors.

8. The display device according to claim 3 , wherein

one of two of the sub-pixel rows adjacent to each other in the column direction includes the plurality of dots periodically arranged for each cycle comprising the dot of the first color and the dot of the second color sequentially arranged,

another one of the two of the sub-pixel rows includes the plurality of dots periodically arranged for each cycle comprising the dot of the second color and the dot of the third color adjacent to each other, and

each of the plurality of dots of the second color is adjacent to the dot of the first color or the dot of the third color in the column direction.

9. The display device according to claim 8 , wherein a distance between centers of gravity of the plurality of dots of the same color closest to each other is identical with regard to the first and third colors.

10. The display device according to claim 3 , wherein

the light-emitting element is a light-emitting diode,

the first color is red,

the second color is green, and

the third color is blue.

11. The display device according to claimer 3 , wherein

the light-emitting element belonging to one of the two of the plurality of sub-pixels including in each of the plurality of dots has an anode connected to an anode of the light-emitting element belonging to another one of the two of the plurality of sub-pixels.

12. The display device according to claimer 3 , wherein

the light-emitting element belonging to one of the two of the plurality of sub-pixels including in each of the plurality of dots has an anode connected, via a connecting transistor, to an anode of the light-emitting element belonging to another one of the two of the plurality of sub-pixels.

13. A display device comprising: