Mainly composed of light source, light guide plate, optical diaphragm, plastic frame and so on. The backlight source has the characteristics of high brightness, long life, uniform luminous and so on. At present, there are three kinds of backlight sources: el, ccfl and led, which can be divided into side light type and straight down type according to the distribution position of light source.
With the development of lcd module in the direction of brighter, lighter and thinner, side-light ccfl backlight has become the mainstream of backlight development at present. The electroluminous (el) backlight source is thin and light, and the light provided is uniform and consistent.
Its power consumption is very low, and the required operating voltage is 80 × 100 vac. the inverter which provides the working voltage can convert the input of 5/12/24vdc into AC output.
However, the service life of the el backlight source is limited (the average service life at 50% brightness is 3000 ≤ 5000 hours, and the service life will be greatly shortened at a higher brightness level). Therefore, the ideal el back lighting inverter allows the output voltage and frequency to increase as the el bulb ages, thus prolonging the effective service life of the display with the back lighting light source of el. Supesite/x-space official station