Casio Shows Inside of 'Hybrid Projector'

Jun 11, 2010
Tadashi Nezu, Nikkei Electronics
The see-through model of the Green Slim Projector
The see-through model of the Green Slim Projector
[Click to enlarge image]
The optical system of the projector
The optical system of the projector
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An image projected by the projector
An image projected by the projector
[Click to enlarge image]

Casio America Inc, an affiliate of Casio Computer Co Ltd, showcased the "Green Slim Projector," a projector that uses an LED unit and laser devices as light sources.

A see-through model of the projector was exhibited at InfoComm 2010, which took place from June 5 to 11, 2010, in Las Vegas, the US. The projector is called a "hybrid type" because it uses two types of light sources.

As light sources, Casio employed a red LED unit and blue semiconductor laser devices (See related article). Green light is created by directing blue laser light at phosphors. The maximum luminance of the Green Slim Projector is about 2,500lm (ANSI lumen), which was realized by using 24 blue semiconductor laser devices. And the projector is equipped with one red LED unit, which has a high output.

Images are generated by directing each of the RGB colored lights at display devices, which feature DLP (digital light processing) technology, with time-sharing control.

To commercialize this projector, Casio focused on its thermal design. In fact, I found the projector is equipped with several large metallic fins and small fans to cool the fins.