LED color temperature compensation method, circuit, color correction chip and LED system

Abstract

The invention provides an LED color temperature compensation method, a circuit, a color-matching chip and an LED system, which can adjust the conduction ratio of each LED in the LED system by inputting an original dimming signal, that is, each LED can Under the control of the compensated dimming signal, the color temperature is adjusted to achieve the required target color temperature of the LED system, that is, the actual color temperature achieved by the LED system is the required target color temperature, thus solving the problem between the actual color temperature and the target of the LED system There is an inherent problem of color temperature mismatch between color temperatures. And there is no need for the upper computer to modify the original dimming signal, so the software of the upper computer used to generate the original dimming signal can be kept unified, avoiding unauthorized modification of the upper computer software, or modifying the upper computer software so that the upper computer needs to have both Issues with multiple software versions.

Description

technical field [0001] The invention relates to the technical field of LED lighting, in particular to an LED color temperature compensation method, a circuit, a color-matching chip and an LED system. Background technique [0002] With the development of LED intelligent lighting, the brightness, color temperature, and color of LEDs can be controlled in various wireless or wired ways, and the control becomes increasingly convenient. At present, the dimming and color adjustment of LEDs is usually realized by PWM pulse width modulation, that is, the brightness and color temperature can be adjusted by adjusting the duty cycle of the PWM signal. Specifically, please refer to figure 1 , in the currently commonly used two-way complementary LED coloring system application, the host computer is used to provide a high-frequency (for example, 2KHz) PWM signal (recorded as PWM_IN) to simultaneously control LED1 and LED2 to emit light alternately, for example, in the PWM_IN signal In on...

AI Technical Summary

Problems solved by technology

Obviously, when the color temperature of the LED system needs to be adjusted every time, the upper computer needs to modify the PWM signal output by it, which will cause the problem that there are multiple software versions in the upper computer at the same time, and it will be difficult to modify the upper computer software without permission. The problem of not being able to make the LED system reach the target color temperature

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