Method and circuit for driving backlight light emitting diode (LED) lamp of television, and television

Abstract

The invention discloses a method and a circuit for driving a backlight light emitting diode (LED) lamp of a television, and the television. The method comprises the following steps of: performing corresponding phase shift time delay processing on a field synchronous signal of the television according to turning time of liquid crystal molecules of a television display screen; performing frequency doubling processing on the field synchronous signal subjected to phase shift time delay, and thus obtaining a first clock control signal of which the frequency is N times the frequency of the field synchronous signal, wherein N is a positive integer and more than or equal to 2; and dividing the first clock control signal into N independent second clock control signals, wherein when the rising edge or the falling edge of the field synchronous signal arrives, the second clock control signals sequentially control N backlight LED lamp strips which are arranged above and below the television to be switched on according to a corresponding time interval. According to the method and the circuit, the problem of cross interference of right and left eyes when the television is in a three-dimensional (3D) state can be solved; furthermore, the display brightness of the television can be improved, and the backlight power consumption of the television is reduced; and aims of saving energy and saving power are fulfilled.

Description

technical field [0001] The invention relates to the technical field of television sets, in particular to a driving method, a driving circuit and a television set for a backlight LED lamp of a television set. Background technique [0002] Because LED lights have the advantages of long life, energy saving, and convenient driving, more and more LCD color TV sets use LED lights as the backlight source of their LCD screens. [0003] In the prior art, there are usually two types of LED backlight schemes for TV sets: (1) direct-lit backlight scheme, that is, several LED lights are directly placed under the LCD screen; (2) side-lit backlight scheme, that is, several LED lights They are respectively arranged around the LCD screen, and the light emitted by each LED lamp is evenly guided to the entire LCD screen by the light guide plate. Compared with the backlight solution (2), the backlight solution (1) can realize the function of local dimming. The so-called local dimming function ...

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Problems solved by technology

[0004] However, the above-mentioned backlight solution (1) also has the following defects: since the flipping of the liquid crystal molecules of the LCD screen takes a certain amount of time, and the driving mode of the TV LCD screen is driven in order from top to bottom, therefore, when the TV When the liquid crystal molecules of the LCD screen of the mobile phone are not flipped, the light emitted by the backlight LED lamp is blocked, thereby wasting the backlight source, that is, consuming part of the power in vain; When the phone is turned on, it will cause the cross-winding problem of the left and right eyes

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