OLED-TV|Laser-TV|SED|Display|FED|

Oil and water flexi-displays that can be rolled up are due to set the world alight, or so we are told. The trick is to find a way to make them cheaply and easily.
LG Philips LCD Company, a joint venture between Philips and the Korean consumer electronics maker LG, makes flexible displays consisting of organic light-emitting diodes (OLEDs) on a flexible plastic substrate.

The only trouble is, these OLEDs need to be made at a higher temperature than the melting point of the plastic substrate, which complicates the manufacturing process significantly – the OLEDs must be first produced on a glass substrate and then transferred to plastic. These extra manufacturing steps increase the cost of the device and decrease the number of defect-free displays that the manufacturing line can produce.

So LG Philips has come up with another idea. Instead of making pixels out of OLEDs, it has designed them out of oil and water contained in tiny plastic cells connected to plastic electrodes. The oil, which is opaque, floats on the water and obscures a coloured surface beneath. But applying an electric field forces the oil away from the water, revealing the coloured layer beneath and changing the colour of the pixel. This type of reflective display can be made at low temperatures in a small number of steps, says the company.
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