LCDs are in some ways better than OLEDs and some ways worse. OLEDs can make more colors and levels of brightness than LEDs. Unlike LCDs their colors do not change when viewed at an angle. They are also much cheaper to make. OLEDs make light, so they do not need a light shining through from the back as LCDs do. This also makes black parts of the screen able to be fully turned "off" making them darker. LCDs also need to use filters to work properly. These filters block much of the light created by the LED/CCFL. Because of backlighting and filtering, OLEDs use far less power than LCDs for the amount of light made. OLEDs also react faster to changes in electricity. They turn on and off much faster than LCDs.