Method for adjusting error diffusion of LED (Light Emitting Diode) dynamic backlight

A dynamic backlight and error diffusion technology, applied in static indicators, instruments, etc., can solve problems such as affecting the quality of image display

Inactive Publication Date: 2010-07-14
IRICO
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Problems solved by technology

However, due to the use of dynamic backlight, the brightness and darkness of the backlight will change dynamically with the change of the image. When an image with a large black-and-white contrast moves on the LC...

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  • Method for adjusting error diffusion of LED (Light Emitting Diode) dynamic backlight
  • Method for adjusting error diffusion of LED (Light Emitting Diode) dynamic backlight
  • Method for adjusting error diffusion of LED (Light Emitting Diode) dynamic backlight

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0021] In order to have a more complete and clear disclosure of the technical content used in the present invention, the purpose of the invention and the effects achieved, the detailed description will be given below.

[0022] Algorithm flow of the present invention image 3 :

[0023] 1) Read the backlight data of a backlight partition; the backlight partition is an LED backlight array with N rows and M columns, the row numbers are from 1 to N, and the column numbers are from 1 to M. There are N×M backlight partitions in total, wherein N and M are integers greater than 1;

[0024] 2) Determine the location of the surrounding partitions of this partition;

[0025] 3) Read the backlight data of the surrounding partitions;

[0026] 4) According to the process Figure 4 Calculate new backlight data for this partition.

[0027] The specific process is as fo...

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Abstract

The invention relates to a method for adjusting the error diffusion of an LED (Light Emitting Diode) dynamic backlight, which comprises the steps of: reading the backlight data of a backlight subarea; judging the position of surrounding subareas of the subarea; reading the backlight data of the surrounding subareas of the subarea; judging whether the sum of the data of the subarea and a threshold value is less than the maximum data of the surrounding subareas; if so, the new backlight data of the subarea is equal to the sum of the original backlight data of the subarea and the multiplication product of the surrounding subareas backlight data with a diffusion coefficient K; if not, keeping the backlight data of the subarea unchanged, that is to say, the new backlight data of the subarea is equal to the original backlight data of the subarea. By obfuscating the backlight data of an image, the invention solves the defects that vision is influenced seriously by the sliding of a backlight shadow on a screen when brightness difference between adjacent backlight subareas is too large in dynamic backlight.

Description

technical field [0001] The invention relates to an adjustment method of LED backlight, in particular to an error diffusion adjustment method of LED dynamic backlight. Background technique [0002] Compared with LCD with CCFL cold cathode fluorescent lamp as backlight, LCD with LED as backlight has the advantages of environmental protection, health, power saving and energy saving, strong color performance and long service life. The dynamic LED backlight method has the advantages of more energy saving and high contrast. However, due to the use of dynamic backlight, the brightness and darkness of the backlight will change dynamically with the change of the image. When an image with a large black-and-white contrast moves on the LCD screen, the backlight will also move with the movement of the image. At this time, the backlight The bright and dark shadows will appear from the LCD screen, which seriously affects the display quality of the image. Contents of the invention [00...

Claims

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Application Information

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IPC IPC(8): G09G3/34G09G3/36
Inventor 郑志华
Owner IRICO
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