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Drive method of LCD backlight modules

A technology of liquid crystal display and backlight module, which is applied in the direction of static indicators, light sources, instruments, etc., can solve the problems of long and limited time for the lamp to reach a steady state, and achieve the effect of improving motion blur, ingenious conception, and reasonable design

Inactive Publication Date: 2011-02-16
HUAYING OPTOELECTRONICS
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Problems solved by technology

Taking the cold cathode fluorescent lamp as an example, its light start-up time (10% to 90% relative brightness) and light decay time are about 3 milliseconds each. Since the lamp takes a long time to reach a steady state, the effect of improving motion blur is limited. limit

Method used

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  • Drive method of LCD backlight modules
  • Drive method of LCD backlight modules
  • Drive method of LCD backlight modules

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Embodiment Construction

[0024] Certain terms are used in the specification and subsequent claims to refer to particular elements. It should be understood by those skilled in the art that manufacturers may refer to the same element by different terms. This description and subsequent patent applications do not use the difference in name as the way to distinguish components, but the difference in function of the components as the basis for distinction. The "comprising" mentioned throughout the specification is an open-ended term, so it should be interpreted as "including but not limited to".

[0025] Compared with the scanning signal S1 with a fixed duty cycle in the prior art, the present invention adjusts the scanning signal according to the brightness characteristic of the lamp tube of the scanning backlight module. to alternately turn off and turn on the backlight module lamps. Please refer to figure 2 , figure 2 It is a timing diagram of a scanning backlight module driving method in the first...

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Abstract

The invention relates to a drive method of LCD backlight modules, which is characterized in that a first operating current with fixed value is provided within a first scheduled period to adjust the brThe invention relates to a drive method of LCD backlight modules, which is characterized in that a first operating current with fixed value is provided within a first scheduled period to adjust the brightness of a backlight from a first brightness to a second brightness; and after the brightness of the backlight reaches the second brightness, a second operating current with a pulse form is provideightness of a backlight from a first brightness to a second brightness; and after the brightness of the backlight reaches the second brightness, a second operating current with a pulse form is provided within a second scheduled period for the backlight to improve the dynamic fuzzy.d within a second scheduled period for the backlight to improve the dynamic fuzzy.

Description

technical field [0001] The invention relates to a driving method of a liquid crystal display backlight module, in particular to a driving method of a liquid crystal display backlight module capable of improving motion blur. technical background [0002] Liquid Crystal Display (LCD) has the characteristics of light and thin appearance, low power consumption, and no radiation pollution. It has been widely used in information products such as computer systems, mobile phones, and personal digital assistants (PDA). . The liquid crystal display uses the rotation of the liquid crystal to control the penetration of light to display gray scales of different brightness. Compared with the cathode ray tube (CRT) display using an impulse-type display method, the liquid crystal display uses a voltage continuous holding (hold-type) driving method. Since the rotation of the liquid crystal changes continuously, the reaction speed of animation performance is slower than that of the cathode ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/34H05B41/38
Inventor 邱俊杰颜士杰
Owner HUAYING OPTOELECTRONICS
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