Display device

• US 10,217,772 B2
• Filed: 04/23/2018
• Issued: 02/26/2019
• Est. Priority Date: 09/12/2014
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Shishido, Hideaki, Miyake, Hiroyuki, Toyotaka, Kouhei, Kaneyasu, Makoto
• Primary Examiner(s): Au, Bac
• Application Number:
  US15/959,566
• Publication Number:
  US 20180308866A1
• Time in Patent Office: 309 Days
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/13624 having more than one switching element per pixel
• CPC Class Codes: G02F 1/136277 formed on a semiconductor substrate, e.g. of silicon
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• 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 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 3/2085 Special arrangements for addressing the individual elements of the matrix, other than by driving respective rows and columns in combination
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 3/3659 the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
• 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 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• 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 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/35 : comprising red-green-blue [RGB] subpixels
• 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
• CPC Class Codes: H10K 59/40 : OLEDs integrated with touch screens

Abstract

Provided is a display device with high resolution, high display quality, or high aperture ratio. A pixel includes three subpixels and is electrically connected to two gate lines. One of the gate lines is electrically connected to a gate of a transistor included in each of the two subpixels, and the other gate line is electrically connected to a gate of a transistor included in the other subpixel. Display elements of the three subpixels are arranged in the same direction. Three pixel electrodes of the three subpixels are arranged in the same direction.

Claims

1. A display device comprising:

a first display element comprising a first electrode, the first display element electrically connected to a first transistor;

a second display element comprising a second electrode, the second display element electrically connected to a second transistor;

a third display element comprising a third electrode, the third display element electrically connected to a third transistor;

a fourth display element comprising a fourth electrode, the fourth display element electrically connected to a fourth transistor;

a first wiring;

a second wiring; and

a third wiring;

wherein the first transistor and the second transistor are along a first direction,

wherein the third transistor and the fourth transistor are along the first direction,

wherein the first transistor and the third transistor are along a second direction perpendicular to the first direction,

wherein the second transistor and the fourth transistor are along the second direction,

wherein the first electrode, the second electrode, the third electrode, and the fourth electrode, are along the second direction,

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

wherein the second wiring is electrically connected to a gate of the second transistor and a gate of the fourth transistor, and

wherein the third wiring is electrically connected to one of a source and a drain of the first transistor and one of a source and a drain of the fourth transistor.

2. The display device according to claim 1, wherein light extracted from the first display element and light extracted from the fourth display element are the same color.

3. The display device according to claim 2, wherein light extracted from the first display element and light extracted from the fourth display element are red light.

4. The display device according to claim 2, wherein light extracted from the second display element is blue light.

5. The display device according to claim 2, wherein light extracted from the third display element is green light.

6. A display device comprising:

a first display element comprising a first electrode, the first display element electrically connected to a first transistor;

a second display element comprising a second electrode, the second display element electrically connected to a second transistor;

a third display element comprising a third electrode, the third display element electrically connected to a third transistor;

a fourth display element comprising a fourth electrode, the fourth display element electrically connected to a fourth transistor;

a fifth display element comprising a fifth electrode, the fifth display element electrically connected to a fifth transistor;

a sixth display element comprising a sixth electrode, the sixth display element electrically connected to a sixth transistor;

a first wiring;

a second wiring;

a third wiring; and

a fourth wiring,

wherein the first transistor and the second transistor are along a first direction,

wherein the third transistor and the fourth transistor are along the first direction,

wherein the fifth transistor and the sixth transistor are along the first direction,

wherein the first transistor, the third transistor, and the fifth transistor are along a second direction perpendicular to the first direction,

wherein the second transistor, the fourth transistor, and the sixth transistor are along the second direction,

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

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

wherein the third wiring is electrically connected to one of a source and a drain of the first transistor and one of a source and a drain of the fourth transistor, and

wherein the fourth wiring is electrically connected to one of a source and a drain of the third transistor and one of a source and a drain of the sixth transistor.

7. The display device according to claim 6, wherein light extracted from the first display element and light extracted from the fourth display element are the same color.

8. The display device according to claim 7, wherein light extracted from the third display element and light extracted from the sixth display element are the same color.

9. The display device according to claim 7, wherein light extracted from the first display element and light extracted from the fourth display element are red light.

10. The display device according to claim 7, wherein light extracted from the second display element is blue light.

11. The display device according to claim 7, wherein light extracted from the third display element and light extracted from the sixth display element are green light.