STEPPED DIMMING DEVICE FOR LED LAMP
First Claim
1. A dimming device for a light emitting diode (LED) lamp, comprising:
- a filter and rectifier circuit connected to a power supply through a power switch for converting an input AC voltage into a DC pulse voltage;
a switch power supply circuit module having a terminal connected to the filter and rectifier circuit for converting the DC pulse voltage into a stable DC voltage which is supplied to a LED lamp load;
a feedback circuit module having a terminal connected to another terminal of the switch power supply circuit module, the feedback circuit module being capable of sampling a voltage and/or current signal of the LED lamp load and delivering a feedback signal to the switch power supply circuit module responsive to the sampled signal;
a dimming signal generation module comprising a switch signal detection circuit module for detecting a momentary variation in on/off states of the power switch and converting the momentary variation into a dimming signal which is delivered to a dimming control module, or an analog signal detection circuit module for detecting a dimming signal received from an external signal source and delivering the detected signal to the dimming control module, or a combination thereof;
wherein the dimming control module which receives the dimming signal has a terminal connected to the feedback circuit module, and generates and delivers a dimming control signal to the feedback circuit module in response to the received dimming signal, and the feedback circuit module is then controlled by the dimming control module to provide the feedback signal to the switch power supply circuit module, thereby controlling alteration of a predetermined set of working states of the LED lamp load in a cyclic manner to effect the dimming in a stepped fashion.
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Accused Products
Abstract
The present invention relates to a novel dimming device for a LED lamp capable of effecting a stepped dimming of the LED lamp by detecting a momentary variation in on/off states of the power switch, enabling the LED lamp to vary to work in a plurality of working states in a cyclic manner according to a predetermined program. The dimming device the present invention overcomes the technical problems of using a regular power switch to effect dimming and allows the use of the regular power switch to effect the stepped dimming of LED lamp. The present invention may also use an external DC signal source to effect the stepped dimming of LED lamp. According to the present invention, a user may adjust the brightness of the LED lamp when needed, which not only facilitates the daily life of the user but also effectively save the energy.
33 Citations
13 Claims
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1. A dimming device for a light emitting diode (LED) lamp, comprising:
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a filter and rectifier circuit connected to a power supply through a power switch for converting an input AC voltage into a DC pulse voltage; a switch power supply circuit module having a terminal connected to the filter and rectifier circuit for converting the DC pulse voltage into a stable DC voltage which is supplied to a LED lamp load; a feedback circuit module having a terminal connected to another terminal of the switch power supply circuit module, the feedback circuit module being capable of sampling a voltage and/or current signal of the LED lamp load and delivering a feedback signal to the switch power supply circuit module responsive to the sampled signal; a dimming signal generation module comprising a switch signal detection circuit module for detecting a momentary variation in on/off states of the power switch and converting the momentary variation into a dimming signal which is delivered to a dimming control module, or an analog signal detection circuit module for detecting a dimming signal received from an external signal source and delivering the detected signal to the dimming control module, or a combination thereof; wherein the dimming control module which receives the dimming signal has a terminal connected to the feedback circuit module, and generates and delivers a dimming control signal to the feedback circuit module in response to the received dimming signal, and the feedback circuit module is then controlled by the dimming control module to provide the feedback signal to the switch power supply circuit module, thereby controlling alteration of a predetermined set of working states of the LED lamp load in a cyclic manner to effect the dimming in a stepped fashion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification