LED Downlight luminance data

 Changes in temperature, according to the color sensor measuring the red, green, and blue   LED Downlight luminance data, trimming orange lights and blue lights of the PWM waveform is high time to make red, green and blue light ratio is constant, the color temperature to maintain unchanged.

4 Conclusions

In SS-230 flat panel display system integrated analytical instruments, from low brightness to high brightness variation measured 40 points, adjust the three kinds of lights PWM pulse high time to give the standard white light. Then the linear fitting method to obtain brightness of the lamp case,  LED Strip three kinds of PWM waveform high ratio between the duration, according to the relationship between the dimming range can ensure that the backlight luminance is a standard white light.

According to the color sensor output red, green and blue three color channels of data, trimming orange lights and blue lights of the PWM high time to maintain the red, green and blue three color channels of data is the ratio between constant color temperature constant. Applying the  GU10 above ways to get out of screen white color temperature in (6 500 ± 100) K or less, the color coordinates u 'at 0. 198 ± 0. 01 or less, v' at 0. 468 ± 0. 01 less than the standard white light.

For many consumers, led technology is a new printing technology, even though it has been 28 years since its inception;