Researchers develop laser light source for mobile projectors

VTT Technical Research Centre of Finland, EpiCrystals and the Aalto University are developing a better laser light source for projectors that will be integrated into mobile phones.

According to a statement, the development of such technology will enable accurate and efficient projection of photographs and movies on any surface.

Small-size laser projectors 1–2cm in length can be integrated into many kinds of electronic appliances, such as digital or video cameras, gaming devices and mobile phones. Integrated micro projectors could, in practice, project images the size of an A3 sheet of paper on a wall.

The challenge is to develop a small, energy-efficient and luminous three-colour (RGB) light source, whose manufacturing costs can be kept low, for use in the projectors.

Timo Aalto, principal scientist from VTT, said: ‘The project has successfully combined multi-technological know-how from VTT and its partners in the project, from manufacturing materials and the accurate focusing of laser chips all the way to production line design.

‘The project was launched last autumn, and we are now entering the stage where we can move from brainstorming and design to building prototypes.

‘It is our goal to prove by next summer that large quantities of the new laser light sources can be manufactured quickly and economically.’

EpiCrystals believes it can reach the global market with this product, and it is the company’s goal to be the technology and market leader in laser light sources for micro projectors by 2015.

Tomi Jouhti, EpiCrystals’ vice-president of business development, said: ‘We are developing an entirely new technology that is currently not in use anywhere else in the world.

‘At the moment, there are standalone projectors on the market that can be connected to electronic appliances and early-stage integrated projectors, but their quality and price are not competitive enough.

‘Large electronics manufacturers are extremely interested in integrated projectors and market research shows that demand for these micro projectors will increase strongly in the coming years.

‘Soon, around two billion mobile phones per year will be sold in the world and if even a couple of per cent of those contain a projector, we are talking about tens of millions of copies, and the hundred million mark is not far either.’

EpiCrystals’ laser modules will be mass produced in Asia, but the research and development will remain in Finland.

The VTT, EpiCrystals and Aalto University project has received funding from the Finnish Funding Agency for Technology and Innovation Tekes, among others.

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