Method for improving dynamic display effect of backlight partition liquid crystal display television, storage medium and television

Abstract

The invention relates to a liquid crystal display television display technology, discloses a method for improving the dynamic display effect of a backlight partition liquid crystal display television, a storage medium and a television, and aims to improve the display effect of dark field signals of the backlight partition liquid crystal display television. In the invention, the following operations are executed for each frame of picture: S1, counting the average brightness information of the current frame; s2, judging whether the current frame is a dark field signal or not according to the average brightness information of the current frame and a preset dark field signal brightness judgment threshold value, if so, entering step S3, otherwise, not correcting the current frame, and ending the process; s3, counting a partition signal input value of the current frame; s4, adjusting the partition signal output value of the current frame according to the partition signal input value of the current frame and the dynamic correction coefficient to obtain a correction curve of the current frame; and S5, adjusting the backlight drive of the backlight partition according to the correction curve of the current frame. The method is suitable for the backlight partition liquid crystal display television.

Description

Technical Field

[0001] The invention relates to a liquid crystal television display technology, and in particular to a method for improving the dynamic display effect of a backlight partitioned liquid crystal television, a storage medium and a television. Background Art

[0002] With the development of display driver technology, more and more LCD TV products use backlight partitioning technology to improve dynamic contrast. Backlight partitioning technology makes the bright areas of the image signal brighter and the dark areas darker, thereby improving the dynamic contrast of LCD TVs. However, for large-area dark field signals, since the input value of each partition signal is small, the existing backlight partitioning method of improving contrast will instead reduce the dynamic range of dark field details, thereby affecting the performance of details. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method, a storage medium and a television set for improving the dynamic display effect of a backlight partitioned liquid crystal television, so as to improve the display effect of a dark field signal of a backlight partitioned liquid crystal television.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] In one aspect, the present invention provides a method for improving the dynamic display effect of a backlight partitioned liquid crystal television, comprising:

[0006] For each frame, perform the following operations:

[0007] S1, counting the average brightness information of the current frame;

[0008] S2, judging whether the current frame is a dark field signal according to the average brightness information of the current frame and the preset dark field signal brightness judgment threshold, if so, proceeding to step S3, otherwise, not correcting the current frame, and ending this process;

[0009] S3, counting the partition signal input value of the current frame;

[0010] S4, adjusting the partition signal output value of the current frame according to the partition signal input value of the current frame and the dynamic correction coefficient to obtain a correction curve of the current frame;

[0011] S5. Adjust the backlight drive of the backlight partition according to the correction curve of the current frame.

[0012] Further, in step S2, judging whether the current frame is a dark field signal according to the average brightness information of the current frame and a preset dark field signal brightness judgment threshold includes:

[0013] If L_th>L_avg, the current frame is determined to be a dark field signal;

[0014] If L_th≤L_avg, the current frame is determined to be a non-dark field signal;

[0015] Wherein, L_th is the preset dark field signal brightness judgment threshold; L_avg is the average brightness information of the current frame.

[0016] Furthermore, in step S4, the dynamic correction coefficient is calculated based on the average brightness information of the current frame and the preset dark field signal brightness judgment threshold, and is expressed as:

[0017] α=L_avg / L_th

[0018] Among them, α is the dynamic correction coefficient.

[0019] Furthermore, in step S4, adjusting the partition signal output value of the current frame according to the partition signal input value of the current frame and the dynamic correction coefficient includes:

[0020] Spi_out=L_th*Power(Spi_in / L_th,α)

[0021] Wherein, Spi_out is the partition signal output value of the current frame; Spi_in is the partition signal input value of the current frame;

[0022] Power() is the power function.

[0023] In a second aspect, the present invention further provides a storage medium storing a computer program, which, when executed by a processor, implements the method for improving the dynamic display effect of a backlight-zoned liquid crystal television as described above.

[0024] In a third aspect, the present invention further provides a television set, comprising a processor and a memory, wherein the memory stores a computer program, and the processor implements the method for improving the dynamic display effect of a backlight partitioned LCD television as described above by executing the computer program.

[0025] The beneficial effects of the present invention are:

[0026] When the present invention determines that the current frame is a dark field signal according to the average brightness information of the current frame and the preset dark field signal brightness judgment threshold, the partition signal output value of the current frame is adjusted according to the partition signal input value of the current frame and the dynamic correction coefficient, wherein the dynamic correction coefficient is the ratio of the average brightness information of the current frame to the dark field signal brightness judgment threshold, so as to achieve the adjustment of the partition signal output when the dark field signal is present, thereby improving the dynamic range of the dark field signal, allowing the image details to have a more delicate expression, and further improving the display effect of the dark field signal of the backlight partitioned LCD TV. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A flow chart of a method for improving the dynamic display effect of a backlight partitioned liquid crystal television in the present invention;

[0028] Figure 2 It is a schematic diagram of a correction curve of the current frame obtained in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The present invention aims to provide a method, storage medium and TV set for improving the dynamic display effect of a backlight partitioned liquid crystal television, and improve the display effect of a dark field signal of a backlight partitioned liquid crystal television. The core idea is: for a dark field signal, a dynamic correction coefficient is calculated by the ratio of the average brightness information of the current frame and the brightness judgment threshold of the dark field signal, and the output value of the partition signal is adjusted according to the dynamic correction coefficient and the input value of the partition signal of the current frame, thereby improving the dynamic range of the dark field signal, allowing the image details to have a more delicate expression, and thus improving the display effect of the dark field signal of the backlight partitioned liquid crystal television.

[0030] For specific implementation, see Figure 1 The method for improving the dynamic display effect of a backlight partitioned liquid crystal television in the present invention comprises the following steps:

[0031] S1. Count the average brightness information L_avg of the current frame.

[0032] S2. According to the average brightness information L_avg of the current frame and the preset dark field signal brightness judgment threshold L_th, determine whether the current frame is a dark field signal. If so, proceed to step S3. Otherwise, do not correct the current frame and end this process.

[0033] The dark field signal is judged as follows:

[0034] If L_th>L_avg, the current frame is determined to be a dark field signal;

[0035] If L_th≤L_avg, the current frame is determined to be a non-dark field signal;

[0036] Among them, L_th is the preset dark field signal brightness judgment threshold, which can be adjusted according to the specific product; L_avg is the average brightness information of the current frame.

[0037] S3. Count the partition signal input value Spi_in of the current frame.

[0038] S4. Adjust the partition signal output value Spi_out of the current frame according to the partition signal input value Spi_in of the current frame and the dynamic correction coefficient α to obtain a correction curve of the current frame.

[0039] The dynamic correction coefficient α is different in each frame, and its value is calculated based on the average brightness information L_avg of the current frame and the preset dark field signal brightness judgment threshold L_th, specifically:

[0040] α=L_avg / L_th

[0041] Among them, α is the dynamic correction coefficient.

[0042] The partition signal output value of the current frame is adjusted according to the partition signal input value of the current frame and the dynamic correction coefficient, including:

[0043] Spi_out=L_th*Power(Spi_in / L_th,α)

[0044] Wherein, Spi_out is the partition signal output value of the current frame; Spi_in is the partition signal input value of the current frame;

[0045] Power() is the power function.

[0046] S5. Adjust the backlight drive of the backlight partition according to the correction curve of the current frame.

[0047] Example

[0048] In this embodiment, the brightness threshold of the dark field signal L_th is set to 40; assuming that the statistical average brightness information of the current frame L_avg=24; then the dynamic correction coefficient of the current frame is calculated to be α=24 / 40=0.6.

[0049] Since the brightness threshold value L_th of the dark field signal is greater than the average brightness information L_avg of the current frame, it can be determined that the current frame is a dark field signal, and corresponding correction needs to be performed.

[0050] The correction method is: count the current frame partition signal input value Spi_in; then adjust the partition signal output value Spi_out according to Spi_in and α=0.6: Spi_out=40*Power(Spi_in / 40,0.6);

[0051] In this way, the correction curve of the current frame can be obtained, such as Figure 2 Finally, the backlight drive of the backlight partition is adjusted according to the correction curve of the current frame to improve the display effect of the dark field signal.

[0052] Finally, it should be noted that the above embodiments are only preferred implementations and are not intended to limit the present invention. It should be pointed out that for those skilled in the art, several modifications, equivalent replacements, improvements, etc. can be made without departing from the scope of the present invention and the scope of protection of the claims, and all of these should be included in the protection scope of the present invention.

Claims

1. A method for improving the dynamic display effect of a backlight partitioned liquid crystal television, characterized in that: include: For each frame, perform the following operations: S1, counting the average brightness information of the current frame; S2, judging whether the current frame is a dark field signal according to the average brightness information of the current frame and the preset dark field signal brightness judgment threshold, if so, proceeding to step S3, otherwise, not correcting the current frame, and ending this process; S3, counting the partition signal input value of the current frame; S4, adjusting the partition signal output value of the current frame according to the partition signal input value of the current frame and the dynamic correction coefficient to obtain a correction curve of the current frame; S5. Adjust the backlight drive of the backlight partition according to the correction curve of the current frame.

2. A method for improving the dynamic display effect of a backlight partitioned liquid crystal television according to claim 1, characterized in that: In step S2, judging whether the current frame is a dark field signal according to the average brightness information of the current frame and the preset dark field signal brightness judgment threshold includes: If L_th>L_avg, the current frame is determined to be a dark field signal; If L_th≤L_avg, the current frame is determined to be a non-dark field signal; Wherein, L_th is the preset dark field signal brightness judgment threshold; L_avg is the average brightness information of the current frame.

3. A method for improving the dynamic display effect of a backlight partitioned liquid crystal television according to claim 2, characterized in that: In step S4, the dynamic correction coefficient is calculated based on the average brightness information of the current frame and the preset dark field signal brightness judgment threshold, and is expressed as: α=L_avg / L_th Among them, α is the dynamic correction coefficient.

4. A method for improving the dynamic display effect of a backlight partitioned liquid crystal television according to claim 3, characterized in that: In step S4, the output value of the partition signal of the current frame is adjusted according to the input value of the partition signal of the current frame and the dynamic correction coefficient, including: Spi_out=L_th*Power(Spi_in / L_th,α) Wherein, Spi_out is the partition signal output value of the current frame; Spi_in is the partition signal input value of the current frame; Power() is the power function.

5. A storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for improving the dynamic display effect of a backlight-zoned liquid crystal television as claimed in any one of claims 1 to 4 is implemented.

6. A television set comprising a processor and a memory, wherein a computer program is stored in the memory, wherein: The processor executes the computer program to implement the method for improving the dynamic display effect of a backlight-zoned liquid crystal television as described in any one of claims 1 to 4.

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