Display device, electro-optical device, electric equipment, metal mask, and pixel array

• US 10,312,295 B2
• Filed: 05/07/2018
• Issued: 06/04/2019
• Est. Priority Date: 11/26/2014
• Status: Active Grant

• Current Assignee: Tianma Microelectronics Company Limited
• Original Assignee: Tianma Japan, Ltd. (Tianma Microelectronics Company Limited)
• Inventors: Matsueda, Yojiro
• Primary Examiner(s): Hall, Victoria K.
• Application Number:
  US15/972,734
• Publication Number:
  US 20180254306A1
• Time in Patent Office: 393 Days
• CPC Class Codes: H10K 2102/311 Flexible OLED
• 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 71/166 using selective deposition, e.g. using a mask
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y10T 428/24298 Noncircular aperture [e.g., slit, diamond, rectangular, etc.]

Abstract

A metal mask for making a display device. The display device includes a plurality of pixels, each of the pixels including sub-pixels of a first color, a second color, and a third color, the sub-pixels of the first and second colors being color in a column, and the sub-pixel of the third color being in a row with respect to the sub-pixels of the first and second colors. The metal mask forms the sub-pixels of the third color and includes a plurality of first openings in a first column and a plurality of second openings in a second column next to the first column, where each of the first openings has a first side that is directly opposite, in a direction perpendicular to the first column, respective parts of second sides of both of an adjacent pair of the second openings.

Claims

1. A display device, comprising

a plurality of main pixels arranged in a matrix,

wherein each of the plurality of main pixels includes one sub-pixel of a first color arranged in a first column, one sub-pixel of a second color arranged adjacent to the sub-pixel of the first color in the first column, and one sub-pixel of a third color arranged in a second column adjacent to the first column,

the sub-pixels of the first color are linearly arranged in a first direction,

the sub-pixels of the second color are linearly arranged in the first direction, the sub-pixels of the third color are arranged in the first direction in a zigzag configuration,

in first and second main pixels adjacent to each other in a second direction different from the first direction, the sub-pixel of the first color of the first main pixel is arranged symmetrical to the sub-pixel of the second color of the second main pixel with respect to a first center line and the sub-pixel of the third color of the first main pixel is arranged symmetrical to the sub-pixel of the third color of the second main pixel with respect to a second center line, and

a position of the first center line is different from a position of the second center line in the second direction.

2. The display device according to claim 1,

wherein each of the sub-pixels of the first to third colors includes a transistor which drives the sub-pixel, an anode electrode connected to the transistor, a contact part which connects the transistor with the anode electrode, an element separation membrane formed on the anode electrode, a light emitting material formed so as to cover an opening part which is provided in the element separation membrane and defines a light emitting region of the sub-pixel, and a cathode electrode formed over the light emitting material,

the light emitting region of the sub-pixel of the first color of the first main pixel is arranged symmetrical to the light emitting region of the sub-pixel of the second color of the second main pixel with respect to the first center line, and

the light emitting region of the sub-pixel of the third color of the first main pixel is arranged symmetrical to the light emitting region of the sub-pixel of the third color of the second main pixel with respect to the second center line.

3. The display device according to claim 2,

wherein the light emitting material is an organic light emitting material.

4. The display device according to claim 3,

wherein the contact part of the sub-pixel of the first color and the contact part of the sub-pixel of the second color in a same main pixel are arranged at positions opposite to each other in the first direction, and

the contact part of the sub-pixel of the third color of the first main pixel and the contact part of the sub-pixel of the third color of the second main pixel are arranged at positions opposite to each other in the second direction.

5. The display device according to claim 4,

wherein each of the light emitting regions of the two sub-pixels of the third color includes a concave in a vicinity of the contact part, and

the concave of the sub-pixel of the third color of the first main pixel and the concave of the sub-pixel of the third color of the second main pixel are arranged at positions opposite to each other in the second direction.

6. The display device according to claim 3,

wherein the first center line is parallel to the second center line in the first direction.

7. The display device according to claim 1,

wherein the first color is a color with a highest luminosity factor and the third color is a color with a lowest luminosity factor.

8. An electro-optical device, comprising a display device according to claim 1.

9. An electric apparatus, comprising a display device according to claim 1 formed on a flexible substrate.