A circuit containing adjustable phase delay and feedback voltage and a method for adjusting the phase delay and the feedback voltage

Abstract

The invention discloses a circuit containing adjustable phase delay and feedback voltage and a method for adjusting the phase delay and the feedback voltage. The circuit comprises a delay setting unit and a phase delay signal generator. The delay setting unit generates delay time according to external resistance. The phase delay signal generator comprises multiple phase delay units each of which comprises an edge triggering sub unit and a signal generating sub unit. The edge triggering sub unit receives an input signal and generate a positive-edge trigger signal and a negative-edge trigger signal according to the positive edge and the negative edge of the input signal. The signal generating sub unit generates and outputs the phase delay signal according to the positive-edge trigger signal, the negative-edge trigger signal, and the delay time, wherein the phase delay signal is the delay time behind the input signal. As a result, the circuit is suitable for light emitting module backlight modules, light emitting module lighting devices, and other light sources demanding phase delay.

Description

technical field [0001] The present invention relates to a circuit with adjustable phase delay and feedback voltage and a method for adjusting the phase delay and feedback voltage, especially a delay setting unit, a phase delay signal generator and a sample and hold unit , A circuit and method for generating adjustable phase delay and stable feedback voltage. Background technique [0002] Please refer to figure 1 and figure 2 , figure 1 It is a schematic diagram to illustrate the afterimage of thin film liquid crystal display (TFT-LCD) due to the slow liquid crystal reaction speed, and figure 2 It is a schematic diagram for explaining that a thin-film liquid crystal display uses a scanning backlight to solve image sticking caused by a slow liquid crystal response. Such as figure 1 As shown, when the liquid crystal in the thin-film liquid crystal display changes from grayscale 0 to grayscale 255, because the liquid crystal reacts slowly and the backlight BL is continuou...

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Problems solved by technology

In this way, the above-mentioned prior art either increases the cost of the system end, or increases the layout complexity of the system end, so the above-mentioned prior art is not the best choice for users

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