Driving method for pixel array, driving circuit, and display device

Patent metadata

Field	Value
Publication number	US-11189208-B2
Application number	US-201716081638-A
Country	US
Kind code	B2
Filing date	Dec 15, 2017
Priority date	Mar 7, 2017
Publication date	Nov 30, 2021
Grant date	Nov 30, 2021

Abstract

A driving method for a pixel array is provided. The driving method includes: amplifying an input image to obtain an intermediate image; calculating display parameters of each actual pixel unit based on display parameters of the intermediate theoretical pixel units of the intermediate image; and generating actual image signals based on the calculated display parameters of each actual pixel unit and inputting the actual image signals to the actual pixel units of the pixel array, respectively.

First claim

What is claimed is:

1. A driving method for a pixel array comprising a plurality of actual pixel units, the driving method comprising:
amplifying an input image to obtain an intermediate image, wherein the input image comprises a plurality of initial theoretical pixel units, the intermediate image comprises a plurality of intermediate theoretical pixel units, and a number of the intermediate theoretical pixel units of the intermediate image matches a number of the actual pixel units in the pixel array;
calculating display parameters of each actual pixel unit based on display parameters of the intermediate theoretical pixel units of the intermediate image; and
generating actual image signals based on the calculated display parameters of each actual pixel unit and inputting the actual image signals to the actual pixel units of the pixel array, respectively,
wherein amplifying the input image comprises longitudinally amplifying the input image by a factor of two; and
wherein display parameters of each initial theoretical pixel unit comprises a first initial display component, a second initial display component and a third initial display component, display parameters of each intermediate theoretical pixel unit comprises a third intermediate display component, a second intermediate display component and a third intermediate display component when, 0<n<M−1, the process of amplifying the input image is performed according to the following equations:
d (2n−1)i =αD ni +βD (n+1)i ;
e (2n−1)i =αE ni +βE (n+1)i ;
f (2n−1)i =αF ni +βF (n+1)i ;
d (2n)i =ηD ni +γD (n+1)i ;
e (2n)i =ηE ni +γE (n+1)i ;
f (2n)i =ηF ni +γF (n+1)i ;

wherein d (2n−1)i is a value of a first intermediate display component of the intermediate theoretical pixel unit in row (2n−1) and column i;
e (2n−1)i is a value of a second intermediate display component of the intermediate theoretical pixel unit in row (2n−1) and column i;
f (2n−1)i is a value of a third intermediate display component of the intermediate theoretical pixel unit in row (2n−1) and column i;
d (2n)i is a value of a first intermediate display component of the intermediate theoretical pixel unit in row 2n and column i;
e (2n)i is a value of a second intermediate display component of the intermediate theoretical pixel unit in row 2n and column i;
f (2n)i is a value of a third intermediate display component of the intermediate theoretical pixel unit in row 2n and column i;
D ni is a value of a first initial display component of the initial theoretical pixel unit in row n and column i;
E ni is a value of a second initial display component of the initial theoretical pixel unit in row n and column i;
F ni is a value of a third initial display component of the initial theoretical pixel unit in row n and column i;
D (n+1)i is a value of a first initial display component of the initial theoretical pixel unit in row (n+1) and column i;
E (n+1)i is a value of a second initial display component of the initial theoretical pixel unit in row (n+1) and column i;
F (n+1)i is a value of a third initial display component of the initial theoretical pixel unit in row (n+1) and column i;
α, β, η, γ are all adjustment coefficients, wherein α+β=1, η+γ=1, 0 α 1, 0 β 1, 0 η 1, 0 γ 1;
n is a natural number; and
M is a total number of rows of intermediate theoretical pixel units of the intermediate image.

2. The driving method of claim 1 , wherein when n=M−1, M, the process of amplifying the input image is performed according to the following equations;
d (2n−1)i =αD ni +βD ni ;
e (2n−1)i =αE ni +βE ni ;
f (2n−1)i =αF ni +βF ni ;
d (2n)i =ηD ni +γD ni ;
e (2n)i =ηE ni +γE ni ;
f (2n)i =ηF ni +γF ni .

3. The driving method of claim 1 , wherein display parameters of the last two rows of intermediate theoretical pixel units of the intermediate image are set to be the same as display parameters of the last two rows of initial theoretical pixel units in the input image.

4. The driving method of claim 1 , wherein each of the initial theoretical pixel units comprises a red initial theoretical sub-pixel, a green initial theoretical sub-pixel, and a blue initial theoretical sub-pixel, and the first initial display component comprises a grayscale value of the red initial theoretical sub-pixel, the second initial display component comprises a grayscale value of the green initial theoretical sub-pixel, and the third initial display component comprises a grayscale value of the blue initial theoretical sub-pixel; and
each of the intermediate theoretical pixel units comprises a red intermediate theoretical sub-pixel, a green intermediate theoretical sub-pixel and a blue intermediate theoretical sub-pixel, and the first intermediate display component comprises a gray-scale value of the red intermediate theoretical sub-pixel, and the second intermediate display component comprises a gray value of the green intermediate theoretical sub-pixel, and the third intermediate display component comprises a gray value of the blue intermediate theoretical sub-pixel.

5. The driving method of claim 1 , wherein the first initial display component comprises an initial lumen component of each of the initial theoretical pixel units, the second initial display component comprises an initial blue-difference chroma component of the initial theoretical pixel unit, and the third initial display component comprises an initial red-difference chroma component of the initial theoretical pixel unit; and
the first intermediate display component comprises an intermediate lumen component of each of the intermediate theoretical pixel units, the second intermediate display component comprises an intermediate blue-difference chroma component of the intermediate theoretical pixel unit, and the third intermediate display component comprises an intermediate red-difference chroma component of the intermediate theoretical pixel unit.

6. The driving method of claim 5 , wherein amplifying the input image to obtain an intermediate image comprises:
calculating the first initial display component, the second initial display component, and the third initial display component of each initial theoretical pixel unit in the input image;
calculating the first intermediate display component, the second intermediate display component, and the third intermediate display component of each intermediate theoretical pixel unit of the intermediate image based on the first initial display component, the second initial display component, and the third initial display component of each initial theoretical pixel unit; and
calculating a grayscale value of a red intermediate theoretical sub-pixel of each intermediate theoretical pixel unit, a grayscale value of a green intermediate theoretical sub-pixel of each intermediate theoretical pixel unit, and a grayscale value of a blue intermediate theoretical sub-pixel of each intermediate theoretical pixel unit based on the first intermediate display component, the second intermediate display component and the third intermediate display component of each intermediate theoretical pixel unit.

7. The driving method of claim 1 , wherein an arrangement of the actual pixel units of the pixel array is the same as that of the intermediate theoretical pixel units of the intermediate image.

8. The driving method of claim 7 , wherein the actual pixel units each comprise a plurality of actual sub-pixels, and a number of the actual sub-pixels is the same as that of the intermediate theoretical sub-pixels in the intermediate image, and in the pixel array, an arrangement of the actual s

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Shi Tiankuo
• Zhang Xiaomang
• Dai Bin
• Shi Lingyun
• Sun Wei
• Gao Bo
• Li Yue

Classifications

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title

• G09G3/20

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G09G5/02

  characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)} · CPC title

• G09G5/00 Primary

  Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators (image data processing or generation, in general G06T) · CPC title

• G09G2350/00

  Solving problems of bandwidth in display systems · CPC title