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

A technology of phase delay and feedback voltage, applied in the direction of instruments, static indicators, etc., can solve the problems of increasing the cost of the system side and increasing the complexity of the layout of the system side, and achieve the effect of low cost

Active Publication Date: 2014-02-19
LEADTREND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment Construction

[0050] Please refer to image 3 , image 3 It is a schematic diagram illustrating a circuit 300 with adjustable phase delay and feedback voltage for an embodiment of the present invention. The circuit 300 includes a delay setting unit 302, a phase delay signal generator 304, a minimum voltage selection unit 306, a sampling and holding unit 308, and a maximum voltage selection unit 310, wherein the maximum voltage selection unit 310, the sampling and holding unit 308, and the minimum voltage selection unit 306 . The delay setting unit 302 and the phase delay signal generator 304 are formed on the integrated circuit chip. But the present invention is not limited to the maximum voltage selection unit 310, the sample and hold unit 308, the minimum voltage selection unit 306, the delay setting unit 302 and the phase delay signal generator 304 are formed on the integrated circuit chip, that is, the maximum voltage The selection unit 310 , the sample-and-hold unit 308 , the minimum...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34
Inventor 李弘庆姚宇桐黄威旗
Owner LEADTREND TECH
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