Active-matrix organic emissive diode (AMOLED) display panel for reducing blue ray energy in display images, driving method thereof, and driving device thereof

• US 10,636,342 B2
• Filed: 04/24/2017
• Issued: 04/28/2020
• Est. Priority Date: 03/31/2017
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Yang, Yong
• Primary Examiner(s): Davis, David D
• Application Number:
  US15/532,045
• Publication Number:
  US 20180286299A1
• Time in Patent Office: 1,100 Days
• Field of Search: None
• 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 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/062 Adjustment of illumination source parameters
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• 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

Abstract

The present disclosure discloses an AMOLED display panel, a driving method thereof, and a driving device thereof. The AMOLED display panel includes a plurality of pixel structures arranged in a matrix, and each of the pixel structures includes at least one red sub-pixel R, at least one green sub-pixel, and at least one blue sub-pixel. The blue sub-pixels of the pixel structures arranged in odd columns respectively have a first emissive peak wavelength, and the blue sub-pixels of the pixel structures arranged in even columns respectively have a second emissive peak wavelength. The first emissive peak wavelength is greater than the second emissive peak wavelength.

Claims

1. An Active-Matrix Organic Emissive Diode (AMOLED) display panel, comprising:

a plurality of pixel structures arranged in a matrix;

wherein each of the pixel structures comprises at least one red sub-pixel, at least one green sub-pixel, and at least one blue sub-pixel;

wherein the blue sub-pixels of the pixel structures arranged in odd columns of the matrix respectively have a first emissive peak wavelength, and the blue sub-pixels of the pixel structures arranged in even columns of the matrix respectively have a second emissive peak wavelength;

or wherein the blue sub-pixels of the pixel structures arranged in odd columns of the matrix respectively have the second emissive peak wavelength, and the blue sub-pixels of the pixel structures arranged in even columns of the matrix respectively have the first emissive peak wavelength;

wherein the first emissive peak wavelength is smaller than the second emissive peak wavelength; and

wherein the blue sub-pixel of each of the pixel structures spans across two rows, and both of the red sub-pixel and the green sub-pixel respectively span across one row;

wherein the blue sub-pixels of the pixel structures arranged in odd columns receive driving signals through a first flexible circuit board, and the blue sub-pixels of the pixel structures arranged in even columns receive driving signals through a second flexible circuit board, such that the driving signals being provided to the blue sub-pixels in odd columns are different from the driving signals being provided to the blue sub-pixels in even columns upon determining a blue ray saturation of a displayed image frame reaches a saturation threshold.

2. The AMOLED display panel as claimed in claim 1, wherein the red sub-pixels, the green sub-pixels, or the blue sub-pixels of the pixel structures respectively comprises an anode layer, a electron hole transport layer, an emissive layer, an electron transport layer, and a cathode layer being stacked in sequence;

wherein an emissive color and an emissive peak wavelength are determined by an emissive material of the emissive layer.

3. The AMOLED display panel as claimed in claim 1, wherein the first emissive peak wavelength is in a range from 430 nm to 445 nm, and the second emissive peak wavelength is in a range from 450 nm to 465 nm.

4. The AMOLED display panel as claimed in claim 1, wherein the red sub-pixel of each of the pixel structures is arranged in m-th column and n-th row of each of the pixel structures, the green sub-pixel of each of the pixel structures is arranged in m-th column and (n+1)-th row of each of the pixel structures, and the blue sub-pixel of each of the pixel structures is arranged in (m+1)-th column and n-th to (n+1)-th rows of each of the pixel structures.

5. The AMOLED display panel as claimed in claim 1, wherein the green sub-pixel of each of the pixel structures is arranged in m-th column and n-th row of each of the pixel structures, the red sub-pixel of each of the pixel structures is arranged in m-th column and (n+1)-th row of each of the pixel structures, and the blue sub-pixel of each of the pixel structures is arranged in (m+1)-th column and n-th to (n+1)-th rows of each of the pixel structures;

wherein m and n are respectively an odd number.

6. A driving device of an AMOLED display panel, wherein the AMOLED display panel comprise a plurality of pixel structures arranged in a matrix;

wherein each of the pixel structures comprises at least one red sub-pixel, at least one green sub-pixel, and at least one blue sub-pixel;

wherein the blue sub-pixels of the pixel structures arranged in odd columns of the matrix respectively have a first emissive peak wavelength, and the blue sub-pixels of the pixel structures arranged in even columns of the matrix respectively have a second emissive peak wavelength;

or wherein the blue sub-pixels of the pixel structures arranged in odd columns of the matrix respectively have the second emissive peak wavelength, and the blue sub-pixels of the pixel structures arranged in even columns of the matrix respectively have the first emissive peak wavelength;

wherein the first emissive peak wavelength is smaller than the second emissive peak wavelength; and

wherein the blue sub-pixel spans across two rows, and both of the red sub-pixel and the green sub-pixel respectively span across one row;

wherein the blue sub-pixels of the pixel structures arranged in odd columns receive driving signals through a first flexible circuit board, and the blue sub-pixels of the pixel structures arranged in even columns receive driving signals through a second flexible circuit board, such that the driving signals being provided to the blue sub-pixels in odd columns are different from the driving signals being provided to the blue sub-pixels in even columns upon determining a blue ray saturation of a displayed image frame reaches a saturation threshold;

wherein the driving device comprise;

an image input unit, configured to receive image data of the displayed image frame;

an image analyze unit, configured to calculate the blue ray saturation of the displayed image frame, and compare the blue ray saturation with the saturation threshold;

an image output unit, comprising a driving circuit module to output driving signals to the pixel structures of the display panel according to the image data of the displayed image frame, and to drive a current displayed image;

wherein the blue sub-pixels of the pixel structures arranged in odd columns is connected to the driving circuit module through a first flexible circuit board, and the blue sub-pixels of the pixel structures arranged in even columns is connected to the driving circuit module through a second flexible circuit board;

wherein with respect to the blue sub-pixels in the image frame, when blue ray saturation of the displayed image frame is greater than the saturation threshold, the driving circuit module drives the blue sub-pixels having the second emissive peak wavelength to display;

wherein with respect to the blue sub-pixels in the image frame when blue ray saturation of the displayed image frame is smaller than the saturation threshold, the driving circuit module simultaneously drive the blue sub-pixels having the first emissive peak wavelength and the blue sub-pixels having the second emissive peak wavelength to display.

7. The driving device of the AMOLED display panel as claimed in claim 6, wherein the image output unit further comprises a signal offset module;

wherein when driving the blue sub-pixels having the second emissive peak wavelength to display, the signal offset module offsets the driving signals of the blue sub-pixels having the second emissive peak wavelength to increase luminance of the blue sub-pixels.

8. The driving device of the AMOLED display panel as claimed in claim 7, wherein the saturation threshold is in a range from 50% to 60%.

9. The driving device of the AMOLED display panel as claimed in claim 6, wherein the saturation threshold is in a range from 50% to 60%.

10. The driving device of the AMOLED display panel as claimed in claim 6, wherein the red sub-pixels, the green sub-pixels, or the blue sub-pixels of the pixel structures respectively comprises an anode layer, a electron hole transport layer, an emissive layer, an electron transport layer, and a cathode layer being stacked in sequence;

wherein an emissive color and an emissive peak wavelength are determined by an emissive material of the emissive layer;

wherein the first emissive peak wavelength is in a range from 430 nm to 445 nm, and the second emissive peak wavelength is in a range from 450 nm to 465 nm.

11. The driving device of the AMOLED display panel as claimed in claim 6, wherein the red sub-pixel of each of the pixel structures is arranged in m-th column and n-th row of each of the pixel structures, the green sub-pixel of each of the pixel structures is arranged in m-th column and (n+1)-th row of each of the pixel structures, and the blue sub-pixel of each of the pixel structures is arranged in (m+1)-th column and n-th to (n+1)-th rows of each of the pixel structures.

12. The driving device of the AMOLED display panel as claimed in claim 6, wherein the green sub-pixel of each of the pixel structures is arranged in m-th column and n-th row of each of the pixel structures, the red sub-pixel of each of the pixel structures is arranged in m-th column and (n+1)-th row of each of the pixel structures, and the blue sub-pixel of each of the pixel structures is arranged in (m+1)-th column and n-th to (n+1)-th rows of each of the pixel structures;

wherein m and n are respectively an odd number.