Plasma television residual image protective method

A plasma and afterimage technology, which is applied in the direction of TV, color TV, color TV parts, etc., can solve the problem that the method of plasma TV afterimage protection is prone to misjudgment, so as to reduce the risk of misjudgment, reduce the impact, and judge the result accurate effect

Inactive Publication Date: 2013-10-23
SICHUAN COC DISPLAY DEVICES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the technical problem that the plasma TV afterimage protection method in

Method used

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  • Plasma television residual image protective method
  • Plasma television residual image protective method
  • Plasma television residual image protective method

Examples

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Example Embodiment

[0056] Example two

[0057] Block signal statistical circuit parameter settings. Set the parameters according to the program memory parameter configuration, set the image block area interval to 4; set the data value of the different block area intervals of the initial frame image, set M1(0)=M2(0) =M3(0) =M4(0) =0; set the image data change threshold E1, E2, E3, E4; set the gray-scale counter threshold J1, J2, J3; set the counter j1, j2, j3=0; count the image data values ​​of the current frame image with different gray levels , Set as M1(1), M2(1), M3(1), M4(1).

[0058] Block signal statistical circuit work flow. Read M1(1) M2(1) M3(1) M4(1). Judgment |M1(1)-M1(0)|≦E1, |M2(1)-M2(0)|≦E2, |M3(1)-M3(0)|≦E3, |M4(1)-M4 (0)|≦E4; if any one of them is not satisfied, then M1(0)= M1(1), M2(0)= M2(1), M3(0)= M3(1), M4(0)= M4 (1), j1=j2=j3=0, re-read M1(1) M2(1) M3(1) M4(1) for data comparison; when all items are satisfied, then j1=j1+1. Judge j1≥J1; otherwise, continue to read M1(1) M2...

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Abstract

The invention relates to the field of plasma televisions and discloses a plasma television residual image protective method, concretely comprising the steps of dividing each frame image into different areas by a display signal processing unit, comparing the corresponding areas in the current frame image with those in the last frame image, and respectively calculating the change of image data values in different areas; if the changes of the image data values in each area do not exceed the set threshold value, enabling a first counter to add 1, otherwise, storing the data value in the current frame image for being compared with the next frame image; and when the value in the first counter is larger than the threshold value set by the first counter, starting a plasma television residual image protective configuration circuit. The image is divided into different areas, and all areas are independently compared, thus enabling the judging of whether an image is static to be more accurate; and the first counter is arranged and the threshold value corresponding to the first counter is arranged, thus avoiding the interference, and the effect of a jump signal on the accuracy of the residual image protective method.

Description

technical field [0001] The invention belongs to the field of plasma televisions, in particular to a method for protecting afterimages of plasma televisions. Background technique [0002] Plasma TVs use plasma display panels (PDP). If the same picture is displayed for a long time, the phosphors in the cell barriers of the plasma display panel will be lost, causing afterimages, which significantly reduce the image quality of the images. Therefore, domestic and foreign manufacturers And its technicians develop and use a variety of technical methods to protect plasma TV afterimages. [0003] To carry out afterimage protection, you must first determine the conditions under which to start afterimage protection. The commonly used method in the prior art is to judge whether the image is static or dynamic by counting the image signal data output by the front end and analyzing the signal data changes. The number of sustain pulses when the sustain pulse drops to full white. During th...

Claims

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Application Information

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IPC IPC(8): H04N5/44H04N5/445H04N5/21G09G3/28
Inventor 余杰蔡静
Owner SICHUAN COC DISPLAY DEVICES
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