About the rated operating voltage and service life of the backlight

  Many times LCD segment code LCD screen are required to support the use of backlight, especially when using negative display screen, must be backlit, then the working voltage and service life of the backlight is the engineers are more concerned about the problem, after all, is to support the use of the working voltage and service life can be consistent with the working voltage and service life of the LCD screen.

  First of all, let's start discussing the working voltage of the backlight. This is from the backlight composition and working principle to explain, the backlight is LED beads plus light guide plate and even light film composition, the principle is the LED beads of the point of dispersion out of the light with light guide plate to make it into a uniform light emitting body. So the working voltage of the backlight is also the working voltage of the LED beads. Take the white lamp for example: its rated voltage is 3V, the large withstand voltage is 3.2V (but a long time in the high voltage of 3.2V will shorten the life of the lamp beads) the bottom of the supply voltage is 2.8V (but if the supply voltage is not enough the brightness of the lamp beads will not be enough, which will certainly affect the brightness of the entire backlight and thus affect the display effect of the LCD screen).

Then, let's discuss the service life of the backlight. Because of the composition of the backlight and the working principle explained above, it is not difficult to understand the service life of the backlight, which is also the service life of the LED beads. Nowadays, the life span of conventional lamp beads is 50,000 hours at the rated operating voltage.

The above is the rated working voltage and service life of the backlight.