The present invention relates to an LED lamp, and more particularly to a color temperature control device for an LED lamp.
A light-emitting diode has the characteristics of high durability, long service life, small size, low power consumption, etc., used as an extremely ideal new-generation lighting source. Especially, in the current situation of rising energy costs, light-emitting diodes are more valued and used by the industry to replace other conventional light-emitting elements that consume more power. In general, light-emitting diodes are used in lighting devices.
However, most of the existing LED lighting devices only output a light source with a single color temperature. The color temperature of this light source depends on the light-emitting diode installed on the lighting device. Therefore, if the user wants to change the color temperature of the light source, it is necessary to replace the light-emitting diode. In use, the LED lighting device cannot be switched at any time for providing light sources with different color temperatures. It is inconvenient to use. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems.
The primary object of the present invention is to provide a color temperature control device for an LED lamp, which can change the color temperature in a full-on state or in a dimming state of the lamp, thereby increasing the convenience of use.
In order to achieve the aforesaid object, the present invention provides a color temperature control device for an LED lamp, electrically connected to a lamp and a mains electricity source. The mains electricity source outputs an AC power source. The lamp is an LED lamp. The lamp includes a driver. The color temperature control device comprises a power supply, at least one operating device, a processor, and a power control circuit. The power supply is electrically connected to the mains electricity source. The power supply is configured to output a DC power source. The operating device is controlled to output a lamp full-on operation signal and a color temperature change operation signal. The operating device is one of a wireless remote control receiver, a wall-mounted switch and a hand-pulling switch. The processor is an MCU processor. The processor is electrically connected to the power supply to receive the DC power source for operation of the processor. The processor is electrically connected to the operating device. The processor receives the lamp full-on operation signal to output a lamp full-on processing signal. The processor receives the color temperature change operation signal to output a color temperature change processing signal. The power control circuit is electrically connected to the processor and the mains electricity source. The power control circuit outputs a lamp full-on control signal to the driver according to the received AC power source and the lamp full-on processing signal for controlling the lamp to be in a full-on state. A voltage-time waveform of the lamp full-on control signal is periodic sine waves composed of multiple cycles of sine waves. The power control circuit outputs a lamp full-on color temperature change control signal to the driver according to the full-on state of the lamp and the color temperature change processing signal for controlling the lamp to change its color temperature in the full-on state. A voltage-time waveform of the lamp full-on color temperature change control signal is composed of a plurality of spaced first positive half cycles or a plurality of spaced first negative half cycles. Each first positive half cycle is a positive half cycle of the sine wave. Each first negative half cycle is a negative half cycle of the sine wave.
In the color temperature control device of the LED lamp provided by the present invention, the power control circuit can output the lamp full-on color temperature change control signal to the driver according to the full-on state of the lamp and the color temperature change processing signal for controlling the lamp to change the color temperature in the full-on state. The power control circuit can output the lamp dimming color temperature change control signal to the driver according to the dimming state of the lamp and the color temperature change processing signal for controlling the lamp to change the color temperature in the dimming state. Thereby, the color temperature of the lamp can be changed in the full-on state of the lamp or in the dimming state of the lamp, thereby increasing the convenience of use.
Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
The power supply 10 is electrically connected to the mains electricity source 210. The power supply 10 is configured to output a DC power source.
The operating device 20 is controlled to output a lamp full-on operation signal S1, a lamp dimming operation signal S2, and a color temperature change operation signal S3. The operating device 20 may be one of a wireless remote control receiver, a wall-mounted switch and a hand-pulling switch.
The processor 30 is an MCU processor. The processor 30 is electrically connected to the power supply 10 to receive the DC power source for operation of the processor 30. The processor 30 is electrically connected to the operating device 20, so that the processor 30 can receive the lamp full-on operation signal 51 to output a lamp full-on processing signal S4. The processor 30 can receive the lamp dimming operation signal S2 to output a lamp dimming processing signal S5. The processor 30 can receive the color temperature change operation signal S3 to output a color temperature change processing signal S6.
The power control circuit 40 includes a TRIAC 41 (triode for alternating current). The power control circuit 40 is electrically connected to the processor 30 and the mains electricity source 210. The power control circuit 40 can output a lamp full-on control signal S7 to the driver 220 according to the received AC power source and the lamp full-on processing signal S4 for controlling the lamp 200 to be in a full-on state. The voltage-time waveform of the lamp full-on control signal S7 is periodic sine waves composed of multiple cycles of sine waves. As shown in
The lamp 200 can change the color temperature in the lamp full-on state. The power control circuit 40 can output the lamp full-on color temperature change control signal S8 to the driver 220 according to the full-on state of the lamp 200 and the color temperature change processing signal S6 for controlling the lamp 200 to change the color temperature in the full-on state. The duration (pulse width) of the lamp full-on color temperature change control signal S8 is at least more than 20 ms. The voltage-time waveform of the lamp full-on color temperature change control signal S8 may be composed of a plurality of spaced first positive half cycles S8a, as shown in
In addition, the lamp 200 can also change the color temperature in the dimming state. The power control circuit 40 can output the lamp dimming color temperature change control signal S10 to the driver 220 according to the dimming state of the lamp 200 and the color temperature change processing signal S6 for controlling the lamp 200 to change the color temperature in the dimming state. The duration (pulse width) of the lamp dimming color temperature change control signal S10 is at least more than 20 ms. The voltage-time waveform of the lamp dimming color temperature change control signal S10 may be composed of a plurality of spaced second positive half cycles S10a, as shown in
The duration (pulse width) of each of the lamp full-on color temperature change control signal S8 and the lamp dimming color temperature change control signal S10 is at least more than 20 ms. After the driver 220 receives the lamp full-on color temperature change control signal S8 and the lamp dimming color temperature change control signal S10, the lamp 200 is turned off, so that the lamp 200 is completely turned off for at least more than 20 ms. After the lamp 200 is restarted, the lamp 200 is controlled to change the color temperature.
Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.
Number | Name | Date | Kind |
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20160374177 | Chen | Dec 2016 | A1 |
20190141812 | Chen | May 2019 | A1 |
20200100341 | Janik | Mar 2020 | A1 |