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A Wide Range and High Resolution Pulse Width Modulation Dimming Method

A high-resolution, pulse width modulation technology, applied in the direction of light source, electric light source, energy-saving control technology, etc., can solve problems such as flicker phenomenon, reduce PWM wave, reduce the quality of lighting fixtures, etc., and achieve the goal of reducing cost and CPU operating speed Requirements, Effects of Improving Convenience

Active Publication Date: 2018-11-27
HENGDIAN GRP TOSPO LIGHTING
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Problems solved by technology

For ordinary PWM (Pulse Width Modulation) dimming technology, in view of the operating speed of the CPU, if you want to increase the dimming level or resolution, you will inevitably reduce the frequency of the PWM wave, which will eventually cause flicker and reduce the lighting effect of the lighting fixture. quality

Method used

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  • A Wide Range and High Resolution Pulse Width Modulation Dimming Method
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  • A Wide Range and High Resolution Pulse Width Modulation Dimming Method

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Embodiment 1

[0028] Such as figure 1 As shown, a wide-range high-resolution pulse width modulation dimming method includes the following steps:

[0029] (1) Obtain the actual minimum arc power value P min , the actual maximum arc power value P max , the number of dimming stages N to be realized;

[0030] (2), according to the actual maximum arc power value P max Normalize the parameters of the actual arc power value to 1, and obtain the normalized minimum arc power value X 1 for Maximum arc power value X N is 1;

[0031] (3), determine the logarithmic dimming curve formula by the data obtained in step (2) The value of the constant C; among them, it represents the arc power value when the dimming level is n;

[0032] (4), obtain the resolution Re of arc power according to the logarithmic dimming curve formula in the step (3);

[0033] (5) Determine the PWM wave pulse width for controlling the arc power according to the arc power and the resolution Re;

[0034] (6) Carry out aver...

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Abstract

The invention discloses a wide-scope high-resolution pulse width modulation (PWM) light modulation method. The method comprises the following steps: 1, obtaining an actual minimum arc power value Pmin, an actual maximum arc power value Pmax and a light modulation series N to be realized; 2, according to the actual maximum arc power value Pmax of 1, performing parameter normalization processing on an actual arc power value; 3, determining the value of a constant C in a logarithm light modulation curve formula (X<n+1>-Xn) / Xn=C; 4, obtaining resolution Re of arc power according to the logarithm light modulation curve formula; 5, determining a PWM wave pulse width controlling the arc power; 6, performing pulse average segmentation on the PWM wave pulse width, or according to an actually needed PWM wave frequency, performing the pulse average segmentation; and 7, performing digital light modulation. According to the invention, the method has the following advantages: while the PWM wave resolution is improved, it can also be ensured that the frequency of PWM waves is not decreased, a flickering phenomenon is prevented, and the like.

Description

technical field [0001] The invention relates to electronic dimming technology, in particular to a wide range and high resolution pulse width modulation dimming method. Background technique [0002] With the advent of the era of intelligent lighting, digital dimming technology has become indispensable. But to use digital dimming technology to achieve quasi-stepless dimming, it is necessary to require more digital dimming stages and higher dimming resolution. In today's digital dimming technology, PWM (Pulse Width Modulation) technology is commonly used. For ordinary PWM (Pulse Width Modulation) dimming technology, in view of the operating speed of the CPU, if you want to increase the dimming level or resolution, you will inevitably reduce the frequency of the PWM wave, which will eventually cause flicker and reduce the lighting effect of the lighting fixture. quality. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
CPCH05B47/19Y02B20/40
Inventor 杜国红陈欣平徐珍宝叶飞王彪
Owner HENGDIAN GRP TOSPO LIGHTING
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