Control circuit and control method for improving LED dimming performance, and LED driving system
An LED drive and control circuit technology, applied in the field of LED drive systems and control circuits for improving LED dimming performance, can solve problems such as easily causing LED flashing lights, and achieve the effect of avoiding LED flashing lights
Active Publication Date: 2016-06-29
SHANGHAI BRIGHT POWER SEMICONDUCTOR CO LTD
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Problems solved by technology
[0004] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a control circuit, a control method and an LED drive system for improving LED dimming performance, which are used to solve the problems of various wireless intelligent controllers in the prior art. In the process of dimming, it is easy to cause the problem of LED flickering
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[0030] 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.
[0031] 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. within the scope covered by the disclosed technical content. At the same time, terms such as "upper", "lo...
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The invention provides an open circuit protection control circuit and a control method for improving an LED dimming performance, and an LED driving system. The open circuit protection control circuit for improving the LED dimming performance comprises an LED open circuit protection module, an inductance current control module and a synchronous control module, wherein the LED open circuit protection module is used for comparing a system demagnetizing time signal with a reference time signal, and outputting an effective initial open circuit protection signal when the system demagnetizing time signal is less than the reference time signal; the inductance current control module is used for detecting the inductance current value of the system, and outputting a current control signal when the inductance current value is greater than a set threshold value; and the synchronous control module is used for controlling an open circuit enabling signal to be ineffective after a set time when the system demagnetizing time signal is received, controlling the open circuit enabling signal to be effective when the current control signal is received, and outputting an open circuit protection signal when the initial open circuit protection signal and the open circuit enabling signal are effective synchronously. By adoption of the open circuit protection control circuit, the LED flashing light can be avoided.
Description
technical field [0001] The invention relates to the field of LED control, in particular to a control circuit, a control method and an LED drive system for improving LED dimming performance. Background technique [0002] With the country's vigorous promotion of energy conservation and environmental protection, LED lighting, as a new technology, has been widely promoted with the characteristics of green, energy saving and environmental protection. With the in-depth development of LED lighting technology, there are more and more demands for various intelligent lighting controls, including wall switch dimming, or smart lighting using 2.4G, Bluetooth, zigbee, wifi, infrared and other wireless controls. the eve of development. The development of these intelligent lighting requirements also requires that the LED drive control circuit used for LED lighting be compatible with these wireless control modules, and can realize various intelligent dimming requirements. At present, the e...
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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/50H05B45/10H05B45/00Y02B20/30
Inventor 郑儒富
Owner SHANGHAI BRIGHT POWER SEMICONDUCTOR CO LTD