Method of driving dual pixel of active matrix organic lighting emitting diode display

• US 10,068,522 B2
• Filed: 08/02/2017
• Issued: 09/04/2018
• Est. Priority Date: 08/20/2015
• Status: Active Grant

• Current Assignee: Chunghwa Picture Tubes Limited
• Original Assignee: Chunghwa Picture Tubes Limited
• Inventors: Huang, Yen-Yu, Huang, Chin-Hai, Tsai, Chi-Chung, Huang, Szu-Chi
• Primary Examiner(s): Xavier, Antonio
• Application Number:
  US15/667,620
• Publication Number:
  US 20170330510A1
• Time in Patent Office: 398 Days
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• 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 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 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element

Abstract

A pixel array includes a plurality of pixels. Each pixel has a first sub-pixel, a second sub-pixel, and a pair of third sub-pixels. The first sub-pixel of each pixel and the first sub-pixels of three adjacent pixels are arranged in a two by two array, the second sub-pixel of each pixel and the second sub-pixels of three adjacent pixels are arranged in a two by two array, and one of each of the third sub-pixels of each pixel and one of the third sub-pixels of three adjacent pixels are arranged in a two by two array. A scan line is connected to a switch unit of each of the sub-pixels in a pixel.

Claims

1. A method of driving a dual pixel of an active matrix organic light emitting diode (OLED) display, wherein the dual pixel comprises a first sub-pixel, a second sub-pixel, and a pair of third sub-pixels arranged in a two by two array, wherein the dual pixel is electrically connected to a first scan line, a second scan line, a first data line, and a second data line, wherein the dual pixel serves as two pixels, and each pixel comprises the first sub-pixel, the second sub-pixel, and one of the third sub-pixels, and the first sub-pixel and the second sub-pixel are shared between the two pixels, the method comprising:

writing data respectively to the first sub-pixel in a first row of the dual pixel through the first data line and one of the third sub-pixels in the first row through the second data line when an enabling signal is applied to the first scan line; and

writing data respectively to the other one of the third sub-pixels in a second row of the dual pixel through the first data line and the second sub-pixel in the second row through the second data line when an enabling signal is applied to the second scan line, wherein when data is written into the first sub-pixel and the second sub-pixel, the first sub-pixel and the second sub-pixel act as sub-pixels for two independent pixels.

2. The method of driving a dual pixel of an active matrix organic light emitting diode (OLED) display as claimed in claim 1, wherein a first OLED of the first sub-pixel emits a green light.

3. The method of driving a dual pixel of an active matrix organic light emitting diode (OLED) display as claimed in claim 1, wherein a second OLED of the second sub-pixel emits a red light.

4. The method of driving a dual pixel of an active matrix organic light emitting diode (OLED) display as claimed in claim 1, wherein a third OLED of each of the third sub-pixel emits a blue light.

5. The method of driving a dual pixel of an active matrix organic light emitting diode (OLED) display as claimed in claim 1, wherein each of the first sub-pixel, the second sub-pixel and the pair of third sub-pixels comprises a switch unit, a driving unit, and at least one capacitor electrically connected between the switch unit and the driving unit.

6. The method of driving a dual pixel of an active matrix organic light emitting diode (OLED) display as claimed in claim 1, wherein the pair of third sub-pixels are diagonal to each other, and the first sub-pixel and the second sub-pixel are diagonal to each other in any configuration.