Process for startup and closing backlight lamp of liquid crystal screen and control system thereof
A liquid crystal screen and backlight technology, which is applied in the field of liquid crystal screen backlight start-up and shutdown methods and its control system, can solve problems such as instantaneous lighting or extinguishing of the liquid crystal screen, and achieve the effects of protecting eyesight, prolonging life, and avoiding impact
Active Publication Date: 2010-02-24
HAIER GRP CORP +2
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Problems solved by technology
[0003] The patent application with the application number 2005100211866.1 provides a method for controlling the timing of a TV LCD during standby, and the patent application with the application number 2005100211865.7 provides a method for controlling the timing of a TV LCD when it is turned on. However, these two patent applications do not propose how to solve the problem of turning on the TV. Or the problem of momentary lighting or extinguishing of the LCD screen when the TV is turned off
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[0030] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0031] Such as figure 1 It shows the liquid crystal screen backlight control system 10 of the present invention, including: a storage unit 1 , a control unit 2 , a liquid crystal screen backlight driving unit 3 , and may also include a power supply switch unit 4 . in:
[0032] The storage unit 1 stores the voltage control parameters of the LCD backlight 5, and the parameters may include functions of time and voltage values, which may be discrete series of values, such as a two-dimensional list of time and voltage values, or may be proportional function or a function of a curve.
[0033] The control unit 2 realizes the control function, including reading the voltage control parameters from the storage unit 1, and sending the function including voltage control parameter instructions to the LCD backlight drive unit 3, and also includes the control of opening or closin...
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The invention provides a liquid crystal screen backlight lamp starting method comprising: receiving a start-up command; lifting a voltage used for driving the liquid crystal screen backlight lamp according to a voltage control parameter. Also provided is a liquid crystal screen backlight lamp turning-off method comprising: receiving a standby or turning-off command; reducing the voltage used for driving the liquid crystal screen backlight lamp according to the voltage control parameter. Further provided is a liquid crystal screen backlight lamp control system including: a storage unit, a control unit, and a liquid crystal screen backlight driving unit. With the invention, instantaneous lighting or extinguishing of the liquid crystal screen can be avoided, thereby avoiding instantaneous impact of an intensive current during starting-up and turning-off, prolonging the life time of the backlight lamp, and providing proper time for viewers, protecting eyesight of the viewers.
Description
technical field [0001] The invention relates to the technical field of liquid crystal televisions, in particular to a method for starting and closing a backlight of a liquid crystal screen and a control system thereof. Background technique [0002] At present, for LCD TVs, when the LCD TV is turned on, the TV system will immediately connect to the power supply of the backlight of the LCD screen, so that the LCD screen will light up instantly, and the sudden change in brightness will cause glare to the eyes of the viewer. When the LCD TV is turned off, the TV system will cut off the power supply of the LCD backlight in an instant, and the LCD screen will go out in an instant. This transient brightness will also affect and stimulate the viewer's eyes in the same way. On the other hand, at the moment when the LCD backlight is turned on and off, due to the sudden change of power supply, the LCD backlight will be subjected to an instantaneous impact of current, which also shorten...
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IPC IPC(8): G09G3/18G09G3/36
Inventor 翟翌立刘强董建伟
Owner HAIER GRP CORP