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A pulse width modulation control signal dimming control circuit, control method and LED drive system

A pulse width modulation and dimming control circuit technology, which is applied in the fields of pulse width modulation control signal dimming control circuit and LED drive system, can solve problems such as LED flashing light and bad dimming experience for customers, and achieve real The effect of stepless control of LED drive and improved control method

Active Publication Date: 2018-06-29
SHANGHAI BRIGHT POWER SEMICONDUCTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 pulse width modulation control signal dimming control circuit, a control method and an LED drive system, which are used to solve the problems of existing LED drive control circuits in the prior art. During the dimming process, it is easy to cause LED flickering, causing bad dimming experience to customers

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  • A pulse width modulation control signal dimming control circuit, control method and LED drive system
  • A pulse width modulation control signal dimming control circuit, control method and LED drive system
  • A pulse width modulation control signal dimming control circuit, control method and LED drive system

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Embodiment Construction

[0029] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0030] It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual impleme...

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Abstract

The invention provides a pulse width modulation control signal dimming control circuit, a control method and an LED driving system. Wherein, the pulse width modulation control signal dimming control circuit includes: a power control switch module for controlling the turning on and off of the LED driving circuit; a DIM control module for receiving the pulse width modulation control signal, and in the pulse width modulation control signal When the level is low, the DIM_OFF signal is output to forcibly turn off the power control switch module, and when the PWM control signal becomes a high level, the DIM_ON signal is output to forcibly turn on the power control switch module. The solution of the present invention not only avoids entering the OVP mode by mistake, but also avoids the problem that the demagnetization signal cannot be detected and cannot enter the next switching cycle, and can realize the real stepless control of LED driving by the PWM signal.

Description

technical field [0001] The invention relates to the field of LED control, in particular to a pulse width modulation control signal dimming control circuit, a control method and an LED drive system. 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. A typical...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/37Y02B20/30
Inventor 郑儒富赵俊杰
Owner SHANGHAI BRIGHT POWER SEMICONDUCTOR CO LTD