Method for selecting FRC pattern

• US 9,311,866 B2
• Filed: 01/11/2013
• Issued: 04/12/2016
• Est. Priority Date: 01/08/2013
• Status: Active Grant

• 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: Dai, Ye
• Primary Examiner(s): NGUYEN, JENNIFER T
• Application Number:
  US13/822,293
• Publication Number:
  US 20150302807A1
• Time in Patent Office: 1,187 Days
• Field of Search: 345/87, 345/89, 345/96, 345208-209, 345/690
• US Class Current: 1/1
• CPC Class Codes: G09G 2310/027 Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/0285 using tables for spatial correction of display data
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• 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 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3685 Details of drivers for data electrodes

Abstract

The present invention provides a method for selecting FRC pattern, which includes (1) providing a display device, which includes a display panel, a signal controller including a look-up table and a data processor, and a data driver; (2) the display panel displaying an image and the signal controller supplying and expanding polarity distribution charts of two adjacent frames of the image; (3) establishing matrixes A, B corresponding to the frames; (4) the data processor retrieving and expanding one FRC pattern from the look-up table into matrixes C, D; (5) the data processor making operation on matrixes A, B, C and D to obtain a two-dimensional chart; and (6) determining if bright/dark strips occur according to the two-dimensional chart, whereby if the strips occur, then repeat steps (4)-(6) and if no such strips occur, then the FRC pattern is kept for subsequent use.

Claims

1. A method for selecting frame rate conversion (FRC) pattern, comprising the following steps:

(1) providing a display device, wherein the display device comprises;

a display panel, a signal controller electrically connected to the display panel, and a data driver that drives the display panel, the signal controller comprising;

a look-up table and a data processor electrically connected to the look-up table, the look-up table storing a plurality of different FRC patterns;

(2) the data driver driving the display panel to display a pure color image, the signal controller supplying polarity distribution charts of two adjacent frames of the pure color image by applying an inversion operation and expanding the polarity distribution charts to m×

n dimensions, where m and n are integer multiples of four;

(3) establishing matrixes A, B that respectively correspond to the two frames according to the two frames;

(4) the data processor selecting and retrieving one of the FRC patterns from the look-up table and expanding the FRC pattern to matrixes C, D of m×

n dimensions;

(5) the data processor taking an operation on matrixes A, B, C, and D according to the formula A.*C+B.*D and making a two-dimensional chart on the result of the operation, wherein the symbol “

.*”

indicates element-wise product of two individual matrixes, where each of the elements of the matrix product is equal to the multiplication of the elements of the two individual matrix at a position corresponding to that of the matrix product; and

(6) retrieving a next one of the FRC patterns from the look-up table if the two dimensional chart shows a bright/dark strip and repeating steps (4), (5), and (6),

wherein steps (4), (5), and (6) are repeated for each of the FRC patterns of the look-up table until no bright/dark strip shows.

2. The method for selecting FRC pattern as claimed in claim 1, wherein after step (6), step (7) is further included to prompt that no FRC pattern can be used if all the FRC patterns have been tested and no result indicating there is no bright/dark strips can be obtained.

3. The method for selecting FRC pattern as claimed in claim 1, wherein the inversion operation of step (2) comprises dot inversion and line inversion.

4. The method for selecting FRC pattern as claimed in claim 3, wherein the dot inversion operation comprises:

single-dot inversion, two-dot inversion, and three-dot inversion.

5. The method for selecting FRC pattern as claimed in claim 1, wherein in step (3), positive polarity in the polarity distribution charts corresponds to an element “

+1”

of the matrixes A, B and negative polarity in the polarity distribution charts corresponds to an element “

−

1”

of the matrixes A, B.

6. The method for selecting FRC pattern as claimed in claim 5, wherein in step (4), elements “

0” and

“

1”

are used to expand the FRC pattern into matrixes C, D of m×

n dimensions.

7. The method for selecting FRC pattern as claimed in claim 1, wherein the plurality of FRC patterns is of 0.5 level.

8. The method for selecting FRC pattern as claimed in claim 7, wherein the look-up table stores three different FRC patterns.

9. The method for selecting FRC pattern as claimed in claim 7, wherein each of the FRC patterns is in the form of a 4×

4 data matrix.

10. The method for selecting FRC pattern as claimed in claim 1, wherein the display panel comprises a plurality of pixels.

11. A method for selecting frame rate conversion (FRC) pattern, comprising the following steps:

(1) providing a display device, wherein the display device comprises;

a display panel, a signal controller electrically connected to the display panel, and a data driver that drives the display panel, the signal controller comprising;

a look-up table and a data processor electrically connected to the look-up table, the look-up table storing a plurality of different FRC patterns;

(2) the data driver driving the display panel to display a pure color image, the signal controller supplying polarity distribution charts of two adjacent frames of the pure color image by applying an inversion operation and expanding the polarity distribution charts to m×

n dimensions, where m and n are integer multiples of four;

(3) establishing matrixes A, B that respectively correspond to the two frames according to the two frames;

(4) the data processor selecting and retrieving one of the FRC patterns from the look-up table and expanding the FRC pattern to matrixes C, D of m×

n dimensions;

(5) the data processor taking an operation on matrixes A, B, C, and D according to the formula A.*C+B.*D and making a two-dimensional chart on the result of the operation, wherein the symbol “

.*”

indicates element-wise product of two individual matrixes, where each of the elements of the matrix product is equal to the multiplication of the elements of the two individual matrix at a position corresponding to that of the matrix product; and

(6) retrieving a next one of the FRC patterns from the look-up table if the two dimensional chart shows a bright/dark strip and repeating steps (4), (5), and (6),

wherein steps (4), (5), and (6) are repeated for each of the FRC patterns of the look-up table until no bright/dark strip shows; and

wherein after step (6), step (7) is further included to prompt that no FRC pattern can be used if all the FRC patterns have been tested and no result indicating there is no bright/dark strips can be obtained;

wherein the inversion operation of step (2) comprises dot inversion and line inversion;

wherein the dot inversion operation comprises;

single-dot inversion, two-dot inversion, and three-dot inversion;

wherein in step (3), positive polarity in the polarity distribution charts corresponds to an element “

+1”

of the matrixes A, B and negative polarity in the polarity distribution charts corresponds to an element “

−

1”

of the matrixes A, B;

wherein in step (4), elements “

0” and

“

1”

are used to expand the FRC pattern into matrixes C, D of m×

n dimensions;

wherein the plurality of FRC patterns are of 0.5 level;

wherein the look-up table stores three different FRC patterns;

wherein each of the FRC patterns is in the form of a 4×

4 data matrix; and

wherein the display panel comprises a plurality of pixels.