LED lamp control device and control method

Abstract

The invention provides an LED lamp control device and control method. The LED lamp control device comprises a control circuit, a first lamp set and a second lamp set. The color temperature of the first lamp set is different from that of the second lamp set. The control circuit comprises a first input end, a second input end, a first triode, a second triode, a first resistor, a second resistor anda fifth resistor; the first input end and the second input end are connected with a voltage control signal, and the voltage control signal is a pulse signal with an adjustable proportion of the firstinput end and the second input end in one period; according to the invention, brightness and color temperature adjustment is realized through the control circuit; the circuit is simple in structure, due to the fact that the same voltage control signal is adopted to adjust the two lamp sets, the two lamp sets can change more naturally among the multiple adjusting signals; and the phenomenon that due to the fact that time delay exists between the two control signals, the two lamp sets change asynchronously, and consequently the two lamp sets are not natural is avoided.

Description

technical field [0001] The invention relates to the technical field of LED lighting, in particular to a control device and a control method for an LED lamp. Background technique [0002] LED lights have been used more and more widely due to their energy-saving and environmental protection characteristics. With the development of LED technology, people's requirements for light quality are also getting higher and higher. Because the human eye receives different brightness and color temperature of LED lights, it will have different feelings, so different visual effects can be obtained with different brightness and color temperature. However, in the existing technology, there are still many places to be improved to realize simultaneous adjustment of the brightness and color temperature of the LED. For example, the method mentioned in CN201410729730. There are only two choices; and as the method mentioned in CN201410240336.5, although the color temperature can be continuously ch...

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Problems solved by technology

[0004] However, the adjustment of the brightness of the lamp is realized by the phase adjustment of the voltage, and the adjustment of the color temperature is realized by controlling the current of the two strings of LED lights. The adjustment of the brightness and color temperature is realized by two control circuits, and the color temperature and brightness cannot be adjusted. Synchronous adjustment and color temperature adjustment are provided with two control units, the first current control unit and the second current control unit respectively control the first LED light string and the second LED light string according to the first current control signal and the second current control signal current, and the first current control signal and the second current control signal are obtained by calculating and converting the currents of the first LED light string and the second LED light string respectively according to dozens of numbers, and then controlling the first LED light The color mixing brightness ratio of the string and the second LED light string is used to adjust the color temperature. In this way, when adjusting the color temperature, two control units need to be controlled separately for adjustment, which will easily lead to unnatural changes in the color temperature between the two LED light strings. At the same time, the color temperature adjustment The method is complex, and due to the need for complex logic operations, there are different delays in the control of each group of LED light strings, and it is impossible to achieve the simultaneous color temperature adjustment of the two light strings

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