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Device and method for controlling brightness of backlight source

A backlight brightness and control device technology, applied to static indicators, instruments, etc., can solve problems that affect the display quality of liquid crystal display panels, and achieve the effect of overcoming flicker

Active Publication Date: 2012-11-21
K TRONICS (SUZHOU) TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The results of the actual use of LED backlight sources show that when the brightness of the image displayed by the LCD panel is low, the human eye can easily observe the flicker phenomenon, which seriously affects the display quality of the LCD panel

Method used

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  • Device and method for controlling brightness of backlight source
  • Device and method for controlling brightness of backlight source
  • Device and method for controlling brightness of backlight source

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Embodiment Construction

[0039] figure 1 It is a schematic structural diagram of the backlight brightness control device of the present invention. Such as figure 1 As shown, the backlight brightness control device of the present invention includes a control mode determination module 1 and a brightness adjustment module 2. The control mode determination module 1 is used to obtain the display brightness parameter of the liquid crystal display panel according to the received input signal, and according to the display brightness parameter The control signal is obtained, and the brightness adjustment module 2 is connected with the control mode determination module 1 for adjusting the brightness of the backlight source by pulse width modulation according to the control signal, or adjusting the brightness of the backlight source by pulse width modulation.

[0040] figure 2 It is a structural schematic diagram of a specific embodiment of the backlight brightness control device of the present invention. ...

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Abstract

The invention relates to a device and a method for controlling the brightness of a backlight source. The device for controlling the brightness of the backlight source comprises a control mode judgment module and a brightness adjustment module, wherein the control mode judgment module is used for acquiring display brightness parameters of a liquid crystal display panel according to a received input signal, and acquiring a control signal according to the display brightness parameters; and the brightness adjustment module is connected with the control mode judgment module and is used for adjusting the brightness of the backlight source in a impulse-width modulation mode or in a pulse amplitude modulation mode according to the control signal. The device and the method effectively overcome blinking phenomena of using an LED backlight source by adopting the combination of the impulse-width modulation mode or the pulse amplitude modulation mode to adjust the brightness of the backlight source in the impulse-width modulation mode when the display brightness is high, and adjust the brightness of the backlight source in the pulse amplitude modulation mode.

Description

technical field [0001] The invention relates to a backlight source control device and a control method thereof, in particular to a backlight source brightness control device and a method thereof. Background technique [0002] Because light-emitting diodes (LEDs) have the advantages of low power consumption, long life, and compact structure, light-emitting diodes are widely used as LED backlights in liquid crystal display panels of devices such as personal digital assistants (PDAs) and mobile phones ( LCD). [0003] At present, the prior art generally adopts a pulse width modulation (PWM) method to adjust the brightness of the LED backlight source. Since the perception of brightness by human vision is not only related to the intensity of brightness, but also related to the luminous time, so using the "persistence of vision" effect of the human eye to change the turn-on and turn-off time of the luminous body will form a visual brightness Variety. The pulse width modulation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34G09G3/36
Inventor 张亮
Owner K TRONICS (SUZHOU) TECH CO LTD