LED lamp light adjusting device

A light adjustment and output technology, which is applied to lighting devices, lamp circuit layout, light sources, etc., can solve the problems of high dimming accuracy, poor linear effect, and low dimming accuracy, and achieve high dimming efficiency and good linear effect. Effect

Inactive Publication Date: 2015-11-11
GUANGZHOU DASEN LIGHTING ELECTRONICS
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Problems solved by technology

Among them, the PWM dimming method is low in cost and high in dimming accuracy. However, when it is between 200 and 20kHz, the inductance and capacitance around the LED driver are likely to generate noise audible to the human ear. In addition, the higher the frequency of the adjustment signal The closer to the gate control signal of the LED driver chip, the worse the linear effect
While the constant current analog linear adjustment method has good linearity, but the dimming accuracy is low

Method used

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  • LED lamp light adjusting device

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the drawings and specific implementations:

[0011] See figure 1 , The present invention relates to an LED lighting adjustment device, and its preferred embodiment includes a controller with a number of PWM output terminals, a number of digital-to-analog converters, and a number of LED analog drivers. Among them, the PWM output, the digital-to-analog converter and the LED analog The drives have a one-to-one correspondence.

[0012] The controller is used to output several PWM control signals through several PWM output terminals; each digital-analog converter is used to convert the corresponding one PWM control signal into a linear analog control signal; each LED analog driver according to the corresponding linear analog control signal Control LED lights.

[0013] In this way, the present invention controls the LED lamp by converting the PWM control signal into an analog signal, which can simultaneously...

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Abstract

The invention relates to an LED lamp light adjusting device. The LED lamp light adjusting device includes a controller provided with a plurality of PWM outputs, a plurality of digital-to-analog converters and a plurality of LED analog drivers, wherein the PWM outputs, the digital-to-analog converters and the LED analog drivers are in one-to-one correspondence; the controller is used for outputting a plurality of paths of PWM control signals through the plurality of PWM outputs; each digital-to-analog converter is used for converting a corresponding path of PWM control signals into linear analog control signals; and each LED analog driver controls an LED lamp according to the corresponding linear analog control signals. According to the LED lamp light adjusting device of the invention, the PWM control signals are converted into the analog signals to control LED lamps, and at the same time, an advantage of high precision of a PWM dimming mode and an excellent linear effect of an analog dimming mode can be combined together; the controller is provided with the plurality of PWM output ends, so that dimming can be performed on a plurality of LED lamps simultaneously, and therefore, dimming efficiency can be improved.

Description

Technical field [0001] The invention relates to an LED light adjusting device. Background technique [0002] At present, LED dimmers mainly include PWM (PulseWidth Modulation, wave width control) dimming mode and constant current analog linear adjustment mode. Among them, the PWM dimming method has low cost and high dimming accuracy. However, when it is between 200 and 20 kHz, the inductance and capacitance around the LED driver are prone to audible noise. In addition, the frequency of the adjustment signal is higher. Close to the gate control signal of the LED driver chip, the worse the linearity effect. Although the constant current analog linear adjustment method has good linearity, the dimming accuracy is low. Summary of the invention [0003] In view of the shortcomings of the prior art, the present invention aims to provide an LED light adjusting device that can solve the above technical problems. [0004] In order to achieve the above objectives, the present invention adop...

Claims

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Application Information

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IPC IPC(8): H05B37/02
Inventor 许法卿
Owner GUANGZHOU DASEN LIGHTING ELECTRONICS
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