A full-color LED unit board of the drive to the drive way traditional sources of Li Qing, mostly in the form of a constant voltage of existence, which makes driving very simple traditional light sources. The linear range, LED luminous intensity of its drive current and forward voltage drop proportional led unit board production, and varies with temperature, which requires a constant current to drive the LED. In addition. Cloud optical, white LED module has an important indicator of Yantai led unit board, is the color temperature. K color temperature to absolute temperature expressed in a light and bold colors are the same, then put the absolute blackbody temperature is called the color temperature of the light source. Depending on the color temperature of white LED white light emitted by the composition ratio of three color components. In order to adjust the indoor full color LED unit board color temperature of the light source, it is necessary for white LED modules in the blue, green and red LED chips three separate drive current control, you need three separate constant current drive circuit. Currently, the constant current drive circuit is generally used to switch-mode PWM controller to achieve its drive current regulation is divided into analog adjustment mode and PWM adjustment method. Full-color LED unit board color temperature adjustable LED drive circuit design in order to stabilize the output light intensity, color temperature, and to achieve light intensity, color temperature adjustment, interior design, a full-color LED unit board drive circuit diagram shown in Figure 4 Fig led unit board, which were used with blue, green and red filters light intensity detector for three kinds of LED light intensity constitute a full-color LED unit board led unit to monitor board structure, and through the AVR microcontroller control, change the corresponding PWM control signal duty cycle, a stable blue, green and red three LED light intensity, to stabilize the full-color LED module board light intensity and color temperature, wherein each LED driving circuit uses the LT3474 as the drive control chip. led unit board, high Jinliang photovoltaic (certified), led unit board provided by the Jinan High Jinliang Optoelectronics Technology Co., Ltd .. Jinan High Jinliang Optoelectronics Technology Co., Ltd. (www.zhkyled.com) is an industry leader in Jinan, Shandong, liquid crystal device, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In high Jinliang photoelectric leadership with the staff warmly welcome all inquiries negotiations to create high Jinliang photoelectric a better future.