Driving method and system of display device with viewing angle calculation and color shift compensation

• US 10,438,528 B2
• Filed: 10/18/2017
• Issued: 10/08/2019
• Est. Priority Date: 07/05/2017
• Status: Expired due to Fees

• Current Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Lai, Ching-hong, Syu, Shensian
• Primary Examiner(s): Ritchie, Darlene M
• Application Number:
  US15/740,660
• Publication Number:
  US 20190012952A1
• Time in Patent Office: 720 Days
• CPC Class Codes: G09G 2310/0221 with use of split matrices G09G3/3644 and G09G3/3666 take precedence
• CPC Class Codes: G09G 2310/0264 Details of driving circuits
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/028 by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
• CPC Class Codes: G09G 2320/068 for control of viewing angle adjustment
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 3/2074 using sub-pixels
• CPC Class Codes: G09G 3/22 using controlled light sources
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 5/02 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

Abstract

The present disclosure discloses a driving method and system of a display device including a plurality of pixel units, wherein the driving method includes: receiving initial image data to be displayed; positioning a viewer to acquire a viewing angle of the viewer with respect to each pixel unit; performing color shift compensation for image data of a pixel unit of which the viewing angle is larger than a threshold value; and driving the display device to display an image according to the image data after compensation. The driving system includes: a data input unit for receiving initial image data to be displayed; a position detection unit for positioning a viewer; a viewing angle calculation unit for calculating and acquiring a viewing angle of the viewer with respect to each pixel unit; a data compensation unit; and a data output unit.

Claims

1. A driving method of a display device comprising a plurality of pixel units, the driving method comprising:

receiving an initial image data to be displayed;

positioning a viewer to acquire a viewing angle of the viewer with respect to each pixel unit;

performing a color shift compensation for image data of a first pixel unit of which the viewing angle is larger than a threshold value; and

driving the display device to display an image according to the image data after compensation,

wherein an image displayed by the first pixel unit according to the image data after compensation, corresponds to an image displayed by the first pixel unit according to the initial image data when the viewing angle is not greater than the threshold value,

wherein gray-scale components of RGB of the initial image data of the first pixel unit are R_i, G_i and B_i, respectively, gray-scale components of RGB of the image data after compensation are R′

_i, G′

_i and B′

_i, respectively, and gray-scale increments of RGB are Δ

R=R′

_i −

R_i, Δ

G=G′

_i−

G_i and Δ

B=B′

_i−

B_i, respectively;

wherein the gray-scale increments Δ

R, Δ

G, and Δ

B of RGB is calculated and acquired according to formula (I) or formula (II);

2. The driving method of the display device of claim 1, wherein the threshold value of the viewing angle is 0°

-5°

.

3. The driving method of the display device of claim 1, wherein a calculation formula of the viewing angle is:

4. A driving system of a display device comprising a plurality of pixel units, the driving system comprising a data processor configured to perform:

receiving an initial image data to be displayed;

positioning a viewer;

calculating and acquiring a viewing angle of the viewer with respect to each pixel unit;

performing a color shift compensation to image data of a first pixel unit of which the viewing angle is greater than a threshold value, to calculate and acquire the image data after compensation; and

outputting the image data after compensation to the pixel unit of the display device,

wherein after performing the color shift compensation to the image data, the image displayed by the first pixel unit according to the image data after compensation corresponds to the image displayed by the first pixel unit according to the initial image data when the viewing angle is not greater than the threshold value,

wherein gray-scale components of RGB of the initial image data of the first pixel unit are R_i, G_i and B_i, respectively, gray-scale components of RGB of the image data after compensation are R′

_i, G′

_i and B′

_i, respectfively, and gray-scale incerments of RGB are Δ

R=R′

_i−

R_i, Δ

G=G′

_i−

G_i and Δ

B=B′

_i−

B_i, respectively;

wherein the data processor calculates and acquires the gray-scale incerments Δ

R, Δ

G and Δ

B of RGB according to the following formula (I) or formula (II);

5. The driving system of the display device of claim 4, further comprising a position detection unit,

wherein the position detection unit includes a camera and an infrared sensor and/or an ultrasonic sensor;

and

wherein the viewing angle of each pixel unit is calculated according to a preset calculation formula, and the calculation formula of the viewing angle is;

6. The driving system of the display device of claim 4, wherein the data processor is preset with a threshold value of the viewing angle, and the threshold value of the viewing angle is 0°

-5°

.

7. A display device comprising a driving system and a display panel, the driving system providing display data to the display panel to drive the display panel to display corresponding images, and the display panel provided with a plurality of pixel units in array, the driving system comprising a data processor configured to perform:

receiving an initial image data to be displayed;

positioning a viewer;

calculating and acquiring a viewing angle of the viewer with respect to each pixel unit;

performing a color shift compensation to image data of a first pixel unit of which the viewing angle is greater than a threshold value, to calculate and acquire the image data after compensation; and

outputting the image data after compensation to the pixel unit of the display device,

wherein after performing the color shift compensation to the image data, the image displayed by the first pixel unit according to the image data after compensation corresponds to the image displayed by the first pixel unit according to the initial image data when the viewing angle is not greater than the threshold value,

wherein gray-scale components of RGB of the initial image data of the first pixel unit are R_i, G_i and B_i, respectively, gray-scale components of RGB of the image data after compensation are R′

_i, G′

_i and B_i, respectively, and gray-scale increments of RGB are Δ

R=R′

_i−

R_i, Δ

G=G′

_i−

G_i and Δ

B=B′

_i−

B_i, respectively;

wherein the data processor calculates and acquires the gray-scale increments Δ

R, Δ

G and Δ

B of RGB according to the following formula (I) or formula (II);

8. The display device of claim 7, further comprising a position detection unit,

wherein the position detection unit includes a camera and an infrared sensor and/or an ultrasonic sensor;

and

wherein the viewing angle of each pixel unit is calculated according to a preset calculation formula, and the calculation formula of the viewing angle is;

9. The display device of claim 7, wherein the data processor is preset with a threshold value of the viewing angle, and the threshold value of the viewing angle is 0°

-5°

.