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Reflective-This is the standard polarize when there is no backlight. This is basically a mirror. The light comes in from the front and bounces off the mirror in the back. There is no backlight from behind, but edge lighting can be used.
A backlight mounted behind the polarizer, will not work on this type of application. It will work just like a flashlight behind a mirror. The light will be blocked and not shine through. This is used where there is high ambient light and no need for a backlight, such as outdoors with strong sunlight or in a well lit factory.
Tranflective- This is kind of a two-way mirror. The light comes in from the front and a backlight placed behind it will shine through. This is used in all types of lighting conditions. This makes it possible to read the LCD with the backlight on and with the backlight off. This is the most common polarizer for any backlight. If the customer is not sure what they want, and they have a backlight choose a transflective.
Transmissive-This is where there will not be enough ambient light to see the display and needs a backlight on all the time. The transmissive polarizer makes the backlight brighter when the backlight is on. The LCD is difficult to read when the backlight is off. But it is still possible to read the characters.
