METHOD OF CALCULATING OVER-DRIVE TARGET

• US 20150221282A1
• Filed: 01/03/2014
• Published: 08/06/2015
• Est. Priority Date: 12/11/2013
• Status: Abandoned Application

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Chen, Lixuan
• Application Number:
  US14/235,695
• Publication Number:
  US 20150221282A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers
• CPC Class Codes: G09G 5/10 Intensity circuits
• CPC Class Codes: G09G 5/18 Timing circuits for raster scan displays specially adapted for television H04N ; synchronisation between the display unit and other display units, videodisc player G09G5/12

Abstract

The present invention provides a method for calculating an over-drive target, which follows a predetermined sequence to perform trials of over-drive target values to identify the R/G/B brightness-response time curve of the over-drive target value that matches target brightness and compares response time of the R/G/B brightness-response time curve that matches the target brightness to identify the over-drive target value, whereby achieves automatic calculation of the over-drive target value of the over-drive chart so as to save human labor, increase efficiency, be better fit to the principle of the over-drive technique, and provide an excellent effect of over driving.

Claims

1. A method for calculating an over-drive target, comprising the followings steps:

(1) performing dynamic switching among four frames, which includes a first to a fourth frames, according to a starting grey level and an ending grey level of a selected chart of an over-drive table to be completed;

(2) trying an over-drive target value in order to obtain an R/G/B brightness-response time curve of the over-drive target value;

(3) subjecting the R/G/B brightness-response time curve obtain in step (2) to a noise reduction and smoothening treatment;

(4) taking brightness value of the third frame of step (1) as target brightness and determining if the R/G/B brightness-response time curve obtained with the over-drive target value shows brightness that matches the target brightness and if yes, going to step (5), otherwise repeating steps (2)-(4);

(5) if the brightness of the R/G/B brightness-response time curve of the over-drive target value of the trial is first brightness that matches the target brightness, filling the over-drive target value in a corresponding position in the over-drive table to be completed and repeating steps (2)-(4); and

if the brightness of the R/G/B brightness-response time curve of the over-drive target value of the trial is not first brightness that matches the target brightness, comparing response time of the R/G/B brightness-response time curve obtained with the over-drive target value to response time of the R/G/B brightness-response time curve obtained with an over-drive target value set in a corresponding position in the over-drive table to be completed and going to step (6);

(6) if the response time of the R/G/B brightness-response time curve obtained with the over-drive target value of the trial is less than the response time of the R/G/B brightness-response time curve obtained with the over-drive target value of the corresponding position in the over-drive table to be completed, replacing the over-drive target value of the corresponding position in the over-drive table to be completed with the over-drive target value of the trial and repeating steps (2)-(5);

if the response time of the R/G/B brightness-response time curve obtained with the over-drive target value of the trial is greater than the response time of the R/G/B brightness-response time curve obtained with the over-drive target value of the corresponding position in the over-drive table to be completed, setting the over-drive target value of the corresponding position in the over-drive table to be completed to be finally determined over-drive target value and going to step (7); and

(7) repeating steps (1)-(6) until calculation of all over-drive target values of the over-drive table.

2. The method for calculating the over-drive target as claimed in claim 1, wherein the over-drive table to be completed is a 17*17 over-drive table and for each time of repeating step (1), at least one of the starting grey level and the ending grey level of the selected chart of the over-drive table to be completed is different.

3. The method for calculating the over-drive target as claimed in claim 1, wherein for each time of repeating step (2), the over-drive target value that is used for trial is different.

4. The method for calculating the over-drive target as claimed in claim 3, wherein based on sequence of repeating, the over-drive target values are tried in step (2) in a sequence from the smallest to the largest.

5. The method for calculating the over-drive target as claimed in claim 3, wherein based on sequence of repeating, the over-drive target values are tried in step (2) in a sequence from the largest to the smallest.

6. The method for calculating the over-drive target as claimed in claim 1, wherein in step (3), a median filter is used to perform noise reduction and smoothening treatment on the R/G/B brightness-response time curve obtained in step (2).

7. The method for calculating the over-drive target as claimed in claim 1, wherein in case of being from a low grey level to a high grey level, the maximum value of the brightness of Step 4 to be matched with the target brightness must be less than 105% of the target brightness.

8. The method for calculating the over-drive target as claimed in claim 1, wherein in case of being from a high grey level to a low grey level, the minimum value of the brightness of Step 4 to be matched with the target brightness must be greater than 95% of the target brightness.

9. The method for calculating the over-drive target as claimed in claim 1, wherein in step (5), the over-drive target value can be determined by comparing original data of the R/G/B brightness-response time curve.

10. The method for calculating the over-drive target as claimed in claim 1, wherein the third frame has a brightness value of 3000 lumens.

11. A method for calculating an over-drive target, comprising the followings steps:

(1) performing dynamic switching among four frames, which includes a first to a fourth frames, according to a starting grey level and an ending grey level of a selected chart of an over-drive table to be completed;

(2) trying an over-drive target value in order to obtain an R/G/B brightness-response time curve of the over-drive target value;

(3) subjecting the R/G/B brightness-response time curve obtain in step (2) to a noise reduction and smoothening treatment;

(4) taking brightness value of the third frame of step (1) as target brightness and determining if the R/G/B brightness-response time curve obtained with the over-drive target value shows brightness that matches the target brightness and if yes, going to step (5), otherwise repeating steps (2)-(4);

(5) if the brightness of the R/G/B brightness-response time curve of the over-drive target value of the trial is first brightness that matches the target brightness, filling the over-drive target value in a corresponding position in the over-drive table to be completed and repeating steps (2)-(4); and

if the brightness of the R/G/B brightness-response time curve of the over-drive target value of the trial is not first brightness that matches the target brightness, comparing response time of the R/G/B brightness-response time curve obtained with the over-drive target value to response time of the R/G/B brightness-response time curve obtained with an over-drive target value set in a corresponding position in the over-drive table to be completed and going to step (6);

(6) if the response time of the R/G/B brightness-response time curve obtained with the over-drive target value of the trial is less than the response time of the R/G/B brightness-response time curve obtained with the over-drive target value of the corresponding position in the over-drive table to be completed, replacing the over-drive target value of the corresponding position in the over-drive table to be completed with the over-drive target value of the trial and repeating steps (2)-(5);

if the response time of the R/G/B brightness-response time curve obtained with the over-drive target value of the trial is greater than the response time of the R/G/B brightness-response time curve obtained with the over-drive target value of the corresponding position in the over-drive table to be completed, setting the over-drive target value of the corresponding position in the over-drive table to be completed to be finally determined over-drive target value and going to step (7); and

(7) repeating steps (1)-(6) until calculation of all over-drive target values of the over-drive table;

wherein the over-drive table to be completed is a 17*17 over-drive table and for each time of repeating step (1), at least one of the starting grey level and the ending grey level of the selected chart of the over-drive table to be completed is different;

wherein for each time of repeating step (2), the over-drive target value that is used for trial is different;

wherein based on sequence of repeating, the over-drive target values are tried in step (2) in a sequence from the smallest to the largest; and

wherein in step (3), a median filter is used to perform noise reduction and smoothening treatment on the R/G/B brightness-response time curve obtained in step (2).

12. The method for calculating the over-drive target as claimed in claim 11, wherein in case of being from a low grey level to a high grey level, the maximum value of the brightness of Step 4 to be matched with the target brightness must be less than 105% of the target brightness.

13. The method for calculating the over-drive target as claimed in claim 11, wherein in case of being from a high grey level to a low grey level, the minimum value of the brightness of Step 4 to be matched with the target brightness must be greater than 95% of the target brightness.

14. The method for calculating the over-drive target as claimed in claim 11, wherein in step (5), the over-drive target value can be determined by comparing original data of the R/G/B brightness-response time curve.

15. The method for calculating the over-drive target as claimed in claim 11, wherein the third frame has a brightness value of 3000 lumens.