AMOLED display devices and methods for producing the sub-pixel structure thereof

• US 9,472,600 B2
• Filed: 06/12/2015
• Issued: 10/18/2016
• Est. Priority Date: 06/12/2014
• Status: Active Grant

• Current Assignee: EverDisplay Optronics (Shanghai) Limited
• Original Assignee: Everdisplay Optonics (Shanghai) Limited
• Inventors: Tsou, Chung Che, Lin, Hsin Chih, Zhang, Bin
• Primary Examiner(s): Schoenholtz, Joseph
• Application Number:
  US14/737,836
• Publication Number:
  US 20150364525A1
• Time in Patent Office: 494 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 59/876 comprising a resonant cavity structure, e.g. Bragg reflector pair

Abstract

One embodiment of the present invention discloses an AMOLED display device and a method for producing the sub-pixels thereof. To change the metal masks used for forming the resonator adjustment layer in sub-pixels to form the sub-pixels with resonator adjustment layers in different thicknesses. On other hands, a light blue sub-pixel and an orange sub-pixel are added into a pixel unit to form the pixel unit consisting of a blue sub-pixel, a red sub-pixel, a green sub-pixel, a light blue sub-pixel and an orange sub-pixel. The AMOLED with the above features can reduce the power consumption in the display screen greatly, and can maintain the high color saturation.

Claims

1. An AMOLED display device, comprising:

a pixel array consisting of a plurality of pixel units, each of the pixel units consisting of a blue sub-pixel, a red sub-pixel, a green sub-pixel, a light blue sub-pixel and an orange sub-pixel, each of the pixel units emitting lights by adjusting its sub-pixels;

wherein, each sub-pixel comprises a resonator adjustment layer, and the resonator adjustment layer in any one of the sub-pixels is different in thickness from the resonator adjustment layer in other sub-pixels;

the blue sub-pixel, the red sub-pixel, the green sub-pixel, the light blue sub-pixel and the orange sub-pixel are arranged in a PenTile way to form in the pixel array;

the green sub-pixel is located centrally;

the blue sub-pixel, the red sub-pixel, the light blue sub-pixel and the orange sub-pixel are arranged around the green sub-pixel.

2. The AMOLED display device as claimed in claim 1, wherein the blue sub-pixel, the red sub-pixel, the light blue sub-pixel and the orange sub-pixel are shared by at least two of the pixel units.

3. The AMOLED display device as claimed in claim 1, wherein the resonator adjustment layer in the orange sub-pixel is 160 nm to 170 nm in thickness;

and

the resonator adjustment layer in the light blue sub-pixel is 100 nm to 110 nm in thickness.

4. The AMOLED display device as claimed in claim 1, wherein the resonator adjustment layer in the blue sub-pixel is 80 nm to 90 nm in thickness;

and

the resonator adjustment layer in the red sub-pixel is 180 nm to 190 nm in thickness.

5. A method for producing sub-pixels of an AMOLED device, comprising:

providing a substrate with a reflecting anode and a hole injection layer thereon;

forming a resonator adjustment layer on the hole injection layer; and

forming a hole transport layer, a luminescent layer, an electron transfer layer, an electron injection layer and a semi-transparent cathode on the resonator adjustment layer in sequence to form a blue sub-pixel, a red sub-pixel, a green sub-pixel, a light blue sub-pixel or an orange sub-pixel;

the green sub-pixel being located centrally;

the blue sub-pixel, the red sub-pixel, the light blue sub-pixel and the orange sub-pixel being arranged around the green sub-pixel;

wherein, the resonator adjustment layer in the orange sub-pixel is thinner than that in the red sub-pixel;

the resonator adjustment layer in the light blue sub-pixel is thicker than that in the blue sub-pixel.

6. The method for producing sub-pixels as claimed in claim 5, wherein the luminescent layer is selected from a group consisting of a blue light luminescent layer, a red light luminescent layer and a green light luminescent layer.

7. The method for producing sub-pixels as claimed in claim 5, wherein the luminescent layer in the light blue sub-pixel is a blue light luminescent layer;

and the resonator adjustment layer in the light blue sub-pixel is 100 nm to 110 nm in thickness;

the luminescent layer in the blue sub-pixel is a blue light luminescent layer; and

the resonator adjustment layer in the blue sub-pixel is 80 nm to 90 nm in thickness.

8. The method for producing sub-pixels as claimed in claim 5, wherein the luminescent layer in the orange sub-pixel is a red light luminescent layer;

and the resonator adjustment layer in the orange sub-pixel is 160 nm to 170 nm in thickness;

the luminescent layer in the red sub-pixel is a red light luminescent layer; and

the resonator adjustment layer in the red sub-pixel is 180 nm to 190 nm in thickness.