Imperial College London (ICL) scientists have developed a new type of OLED that brightens as well as increases the energy efficiency of TV and smartphone screens.
All modern-day gadget screen pixels are lit by little devices called organic light emitting diodes (OLEDs).
These OLED screens come fitted with an anti-glare filter that ensure images displayed by such screens are vivid and crisp even on a bright sunny day
However, because of the physics of how the anti-glare filter works, half of the light generated by each OLED pixel remains trapped within the display, thereby halving the energy efficiency of the OLED.
Imperial scientists led by Dr Jess Wade have now found a way to remedy this by developing a new type of OLED that brighten screens and make smartphone batteries last longer.
Controlling the chemistry of the OLED materials results in OLEDs that give off a special type of polarized light, which can bypass the anti-glare filter.
According to the scientists, displays made from such OLEDs are more energy efficient; they not only boast of a longer battery life, but also have a lower carbon footprint.
“Our study suggests, for the first time, that by changing our OLED recipe we can generate efficient polarizing OLEDs. The findings could make screens of all kinds brighter, with better contrast and longer life,” notes Dr Wade.
While their study was focused on OLEDs for displays, the team asserts that the materials and approaches they have developed could have further applications elsewhere.
They note that the polarized light generated by such materials could also be used in the storage, transmission and encryption of information.
Image and content: Imperial College London