An LCD backlight is a solution to make an LCD readable when there is not enough outside light. The LED backlight is the most common type of backlight used in character, static and mono graphic displays. The LED Backlight illuminates the LCD from the side or back of the display, hence the term Back-Light. Backlights are used in displays to increase visibility in low light conditions. Most LCD’s that are equipped with a backlight employ a diffuser(similar to a lamp shade) to provide a more even light from the LED’s.
Advantages to LED backlights are:
- Solid state, there are no moving parts to break
- DC, there is no need for an inverter
- No noise from the AC inverter, hence, no need for shielding
- The customer can adjust the contrast through the use of a current limiting resistor.
