LED backlight partition current control method, television terminal and readable storage medium

Abstract

The invention discloses an LED backlight partition current control method, a television terminal and a readable storage medium. Based on data of an image to be displayed, the original backlight brightness of each LED backlight partition and a corresponding brightness compensation coefficient are determined, the original backlight brightness of each LED backlight partition is adjusted based on theoriginal backlight brightness of each LED backlight partition and the corresponding brightness compensation coefficient, and the uniform brightness of each LED backlight partition is ensured. In addition, when the driving current of the LED backlight partition is higher than a preset current and the duration exceeds a preset threshold value, the current of the corresponding LED backlight partitionis reduced, a preset duration is maintained, the temperature of the corresponding LED backlight partition can be quickly reduced, the damage to an LED due to excessive temperature is prevented, the service life of the LED is improved, while the uniform brightness of each LED backlight partition is ensured, the temperature of the LED backlight partition is controlled, and the damage to the LED dueto excessive temperature is prevented.

Description

technical field [0001] The invention relates to the field of liquid crystal televisions, in particular to a LED backlight partition current control method, a television terminal and a readable storage medium. Background technique [0002] With the rapid development of liquid crystal display technology, the resolution of the liquid crystal display is getting higher and higher, and the number of image enhancement technologies that can be supported is also increasing, and the size of the liquid crystal display is also increasing. In the prior art, an LED (Light Emitting Diode, light emitting diode) is widely used as a backlight source in large-sized liquid crystal display screens. Backlight Control Circuit When the drive circuit drives the backlight, it needs to control the LEDs of multiple backlight partitions at the same time, adjust the current through the drive circuit, and accurately control the current of the LEDs in each backlight partition, thereby controlling the backl...

AI Technical Summary

Problems solved by technology

[0003] At present, the brightness of each LED that makes up the backlight partition can be adjusted according to the light and shade of the image, that is, increase the backlight brightness of the LED corresponding to the bright part of the image, and reduce the backlight brightness of the LED corresponding to the dark part of the image to achieve the best contrast. Discrete, and the problem of the uniformity of the glass substrate of the display screen, the brightness emitted by the LEDs of different partitions is not exactly the same, resulting in uneven brightness of each LED backlight partition. In addition, when the backlight brightness is high, the current that needs to flow through the LED is also Larger, it is easy to cause the LED to heat up, so that the LED is in a high temperature state, and because the LCD screen generally needs to work for a long time, the LED is in a high temperature state for a long time, which is easy to cause the LED to overheat and burn out

Images