All About Backlighting

Are you struggling to see your screen in the sun, only to go inside and have an equally difficult time indoors? Backlighting is a necessity for most panels, with most environments having enough ambient light to render your screen unreadable.

A variety of different techniques for producing contrast through backlighting are available, both before and after purchasing your panels, which are generally categorized into two main subcategories:

  • Active enhancements
    • Active enhancements encompass direct solutions to your problem, and often require the mounting of a backlight behind the screen to make your image appear brighter in comparison to ambient light.
  • Passive enhancements
    • These generally require much lower power consumption than active enhancements, and rely on re-using light already passing through the screen more effectively to produce similar effects.

LCD displays benefit directly from active enhancements, and involve directly increasing the amount of light shining through the panel, typically by rear mounted LEDs with diffusers to create a relatively homogenous light across the screen. Passive displays focus existing light emiited from the display more effectively; rather than light being scattered and sent in all directions, a polarizer can be applied over the screen to direct it forwards towards viewers. Also, reflective polarizers can be applied which reflect ambient light passing through the screen back to the viewer to brighten the screen itself, rather than being absorbed by the rear of the panel.

In extreme environments, SmarterGlass recommends switching to LED display solutions. This provides robustness and reliability, as it is a solid-state device. Not only is it more reliable, but as the panel itself produces brightness, less power is needed for make your screen shine as needed. Additional benefits are:

  • Brighter solutions with less power consumption than normal backlit panels
  • Less heat produced
  • Wide Temperature Operations
  • Instant on- no warm up time
  • Low Voltage operation
  • More robust when subject to mechanical shock and vibration
  • Long Life Operation and Redundancy
  • No Mercury and ROHS Compliant