Display device and electronic device

• US 9,099,374 B2
• Filed: 08/08/2013
• Issued: 08/04/2015
• Est. Priority Date: 09/30/2005
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Kimura, Hajime, Miyaguchi, Atsushi
• Primary Examiner(s): Green, Tracie Y
• Application Number:
  US13/962,671
• Publication Number:
  US 20140014949A1
• Time in Patent Office: 726 Days
• Field of Search: 313498-512, 315/169.3, 362/609, 362/249.02
• US Class Current: 1/1
• 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 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 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: H01L 27/15 including semiconductor components having potential barriers, specially adapted for light emission
• CPC Class Codes: H01L 29/7869 having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/121 characterised by the geometry or disposition of pixel elements
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• 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

To improve color reproduction areas in a display device having light-emitting elements. A display region has a plurality of picture elements. Each picture element includes: first and second pixels each including a light-emitting element which has a chromaticity whose x-coordinate in a CIE-XY chromaticity diagram is 0.50 or more; third and fourth pixels each including a light-emitting element which has a chromaticity whose y-coordinate in the diagram is 0.55 or more; and fifth and sixth pixels each including a light-emitting element which has a chromaticity whose x-coordinate and y-coordinate in the diagram are 0.20 or less and 0.25 or less, respectively. The light-emitting elements in the first and second pixels have different emission spectrums from each other; the light-emitting elements in the third and fourth pixels have different emission spectrums from each other; and the light-emitting elements in the fifth and sixth pixels have different emission spectrums from each other.

Claims

1. A display device comprising:

a substrate; and

a plurality of pixels over the substrate, the plurality of pixels comprising;

a first pixel comprising a transistor and a light-emitting element, the light-emitting element having a chromaticity whose x-coordinate in a CIE-XY chromaticity diagram is 0.50 or more;

a second pixel and a third pixel each comprising a transistor and a light-emitting element, the light-emitting element having a chromaticity whose y-coordinate in the CIE-XY chromaticity diagram is 0.55 or more;

a fourth pixel and a fifth pixel each comprising a transistor and a light-emitting element, the light-emitting element having a chromaticity whose x-coordinate and y-coordinate in the CIE-XY chromaticity diagram are 0.20 or less and 0.25 or less, respectively; and

a sixth pixel configured to emit white light,

wherein the transistor in each of the first to sixth pixels comprises an oxide semiconductor,

wherein the first pixel, the second pixel and the fourth pixel are arranged in a first row,

wherein the sixth pixel is arranged in a second row,

wherein the third pixel and the fifth pixel are arranged in a third row,

wherein the first row is adjacent to the second row,

wherein the second row is adjacent to the third row,

wherein the light-emitting elements provided in the fourth pixel and the fifth pixel have different thickness from each other,

wherein the fourth pixel and the fifth pixel have different emission spectrums, and

wherein a shape of each of the first to fifth pixels comprises a curvature.

2. The display device according to claim 1, wherein the fourth pixel and the fifth pixel emit light with colors of different coordinates in the CIE-XY chromaticity diagram.

3. The display device according to claim 1, wherein the fourth pixel and the fifth pixel have light-emitting regions with different area dimensions from each other.

4. The display device according to claim 1, wherein the light-emitting element is an electroluminescence element.

5. The display device according to claim 1, wherein the substrate is a flexible substrate.

6. An electronic device comprising the display device according to claim 1, wherein the electronic device is selected from the group consisting of a video camera, a digital camera, a goggle display, a navigation system, an audio reproducing device, a computer, a game machine, a mobile computer, a mobile phone, a portable game machine, an electronic book, and an image reproducing device.

7. A display module comprising the display device according to claim 1, comprising at least one of an FPC and a housing.

8. An electronic device comprising the display module according to claim 7, comprising at least one of a display portion, a battery, an antenna, a speaker and an operating key.

9. A display device comprising:

a substrate; and

a plurality of pixels over the substrate, the plurality of pixels comprising;

a first pixel comprising a transistor and a light-emitting element, the light-emitting element having a chromaticity whose x-coordinate and y-coordinate in a CIE-XY chromaticity diagram are 0.6 or more and 0.35 or less, respectively;

a second pixel comprising a transistor and a light-emitting element, the light-emitting element having a chromaticity whose x-coordinate and y-coordinate in the CIE-XY chromaticity diagram are 0.3 or less and 0.6 or more, respectively;

a third pixel and a fourth pixel each comprising a transistor and a light-emitting element, the light-emitting element having a chromaticity whose x-coordinate and y-coordinate in the CIE-XY chromaticity diagram are 0.15 or less and 0.2 or less, respectively; and

a fifth pixel configured to emit white light,

wherein the transistor in each of the first to fifth pixels comprises an oxide semiconductor,

wherein the first pixel, the second pixel and the third pixel are arranged in a first row,

wherein the fifth pixel is arranged in a second row,

wherein the fourth pixel is arranged in a third row,

wherein the first row is adjacent to the second row,

wherein the second row is adjacent to the third row,

wherein the light-emitting elements provided in the third pixel and the fourth pixel have different thickness from each other,

wherein the third pixel and the fourth pixel have different emission spectrums, and

wherein a shape of each of the first to fourth pixels comprises a curvature.

10. The display device according to claim 9, wherein the third pixel and the fourth pixel emit light with colors of different coordinates in the CIE-XY chromaticity diagram.

11. The display device according to claim 9, wherein the third pixel and the fourth pixel have light-emitting regions with different area dimensions from each other.

12. The display device according to claim 9, wherein the light-emitting element is an electroluminescence element.

13. The display device according to claim 9, wherein the substrate is a flexible substrate.

14. An electronic device comprising the display device according to claim 9, wherein the electronic device is selected from the group consisting of a video camera, a digital camera, a goggle display, a navigation system, an audio reproducing device, a computer, a game machine, a mobile computer, a mobile phone, a portable game machine, an electronic book, and an image reproducing device.

15. A display module comprising the display device according to claim 9, comprising at least one of an FPC and a housing.

16. An electronic device comprising the display module according to claim 15, comprising at least one of a display portion, a battery, an antenna, a speaker and an operating key.