DTI grant boosts LEP research

Cambridge Display Technology has received a Department of Trade and Industry grant for a collaborative project with the National Physical Laboratory and Sheffield University.

Cambridge Display Technology (CDT) has received a Department of Trade and Industry grant for a collaborative project with the National Physical Laboratory (NPL) and Sheffield University.

The LEAP project (on light emission from active polymers) is intended to increase the amount of light generated by an LEP display that is coupled out through the front surface of the device.

The project partners will first model the effects of different structures such as microcavities, aerogels and nano-scale lateral patterning that modify the emission modes of LEP devices.

Structures will then be fabricated within the display devices using the results from the initial modelling work.

The displays produced in the programme will be fully characterised at CDT and NPL, including the measurement of device performance enhancements, uniformity of emission over device area, aging effects and assessment of characteristics such as viewability and contrast.

"The amount of light trapped in current LEP devices is very significant.

The challenge is to improve the performance of these displays by capturing the 'lost light' that is trapped at interfaces within the display and is internally absorbed or emerges at the edges".

said CDT's Director of Business Development Dr Karl Heeks.

"To be useful, this must not be accompanied by any reduction in the visibility or colour balance of the display.

Any success in this area will further improve display efficiency resulting in lower power consumption, and increase in lifetimes for OLED displays".

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