Dimming control device and method applied to LED lighting equipment
A technology of LED lighting and dimming control, applied in lighting devices, light sources, electric light sources, etc., can solve the problems of narrow dimming range, no dimming experience, human eye damage, etc., to solve the problem of narrow dimming range and smooth dimming Light, wide dimming range effect
Active Publication Date: 2021-03-02
SHANGHAI SANSI ELECTRONICS ENG +3
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Problems solved by technology
However, the results of market research show that some of the color temperature adjustable lamps from different manufacturers have very narrow dimming ranges and cannot provide a good dimming experience; some lamps have strobe output at rated power or within the normal dimming range. , so that the strobe under strong light will cause greater or less damage to the human eye
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[0039] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0040] see Figure 1 to Figure 2 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the sa...
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The dimming control device and method applied to LED lighting equipment provided by the present invention, the device includes: at least one LED load dimming control circuit, which includes: an LED connection circuit, a switch circuit, a sampling resistor, a first PWM signal terminal, The second PWM signal terminal, the first inverter, the second inverter and the control element, the control element includes: a reference voltage terminal, a voltage sampling terminal, a control element enable terminal, a switch control terminal and a comparator; The duty cycle of the first PWM signal can adjust the working current of the LED load in the range above the second lower limit threshold, and the second PWM signal duty cycle adjustment can adjust the working current of the LED load in the range below the second lower limit threshold, realizing a very wide adjustment The light range solves the problem of narrow dimming range in the prior art, and the combination of PWM signal and analog signal is used to realize smooth dimming and avoid flickering.
Description
technical field [0001] The invention relates to the technical field of LED circuits, in particular to a dimming control device and method applied to LED lighting equipment. Background technique [0002] With the continuous innovation and development of LED lighting technology, the industry has been able to provide high-quality, high-efficiency, and low-cost LED products in large quantities. Lighting is recognized and popularized. [0003] Among them, the color temperature adjustable products of lamps are especially favored by users. However, the results of market research show that some of the color temperature adjustable lamps from different manufacturers have very narrow dimming ranges and cannot provide a good dimming experience; some lamps have strobe output at rated power or within the normal dimming range. , so that the strobe under strong light will cause greater or less damage to the human eye. Contents of the invention [0004] In view of the above-mentioned sh...
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IPC IPC(8): H05B45/325H05B45/10H05B45/40H05B44/00
CPCH05B45/14H05B45/10Y02B20/30
Inventor 陈鸣帅应红关彦青朱广传
Owner SHANGHAI SANSI ELECTRONICS ENG