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LED light source jitter removal control method and circuit thereof

A technology of LED light source and control circuit, which is applied in the direction of light source, electric light source, electric lamp circuit layout, etc., can solve the problems that affect the comfort of LED light source use, the current value cannot be stabilized, and the current value fluctuates, so as to achieve a good debounce effect. The result is accurate and the effect of reducing up and down fluctuations

Active Publication Date: 2014-01-01
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Claims
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Problems solved by technology

[0002] At present, if a single-chip microcomputer chip with a low working clock frequency is used to realize the constant current function of the constant current source, the current value will not be stable at the set value, resulting in fluctuations in the current value, which are reflected in the use effect In the above, when the LED light source is working, the light of the LED light source shakes, which greatly affects the comfort of the LED light source

Method used

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  • LED light source jitter removal control method and circuit thereof
  • LED light source jitter removal control method and circuit thereof
  • LED light source jitter removal control method and circuit thereof

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] We know that since the actual sampled voltage waveform is non-linear at the microscopic level, that is to say, the sampled value is suddenly large and small, so the current value will be unstable. When the operating clock frequency of the single chip microcomputer is low, if you compare each sampling value and adjust the duty cycle of the PWM, the current value will fluctuate up and down from the set value, which is reflected in the LED circuit, which is the brightness of the brightness. Tiny flickering, jittering. In order to solve this problem, the LED light source debounce control method...

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Abstract

The invention relates to an LED light source jitter removal control method which comprises the following steps: S1. according to a predetermined sampling time interval, sampling an output voltage value of an LED light source many times to obtain a plurality of sampling values, and carrying out processing of removing a maximum value and a minimum value and calculating an average value on the sampling values to obtain an average sampling value; S2. comparing the average sampling value with a set value to obtain a comparison result; S3. determining a duty ratio of a PWM circuit according to the comparison result, wherein, the PWM circuit is used for adjusting the current of the LED light source. The invention also relates to an LED light source jitter removal control circuit. According to the method and the circuit of the invention, through carrying out processing of removing the maximum value and the minimum value and calculating the average value on the sampling values and reducing and adjusting frequency of LED light source current, up and down fluctuation of a current value around a set value is reduced on the basis of not influencing LED light source constant current driving, and tiny flicker and jitter of LED light source intensity are reduced.

Description

technical field [0001] The invention relates to the field of circuit control, more specifically, to a method and circuit for debounce control of an LED light source. Background technique [0002] At present, if a single-chip microcomputer chip with a low working clock frequency is used to realize the constant current function of the constant current source, the current value will not be stable at the set value, resulting in fluctuations in the current value, which are reflected in the use effect Above all, when the LED light source is working, the light of the LED light source shakes, which greatly affects the comfort of the LED light source. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method that can effectively prevent LED from A light source jittering LED light source debounce control method and circuit. [0004] The technical solution adopted by the present invention to solve the technical problem is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 周明杰屈煜
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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