Heat Dissipation Design And Verification For DLP Handheld Pico-Projector

With the development of Pico-Projection technology, the Pico-Projector is available in the markets for the application of business andpersonal entertainment. The market is growing and developing very fastwith a bright future.The handheld Pico-Projector, the object of this thesis, applies thecombined technology of DLP pico-projection and LED light source. Itselects red, green and blue LEDs as light source and DMD chipset asimage device which is produced by TI Company. The Pico-Projector is aportable device as its size is comparable with mobile phone. It isconvenient to use at any time, only requiring a flat panel for projection.The heat inside the projector case is generated by red, green and blue LEDlight source, which gives50%of total heat within1/4of internal space. Tosolve the heat dissipation of LED light source, it is a big challenge of Pico- projector. This article starts the discussion with a preliminary heatdissipation design solution and has the thermal analysis via finite elementanalysis application software. With the execution of the designedtemperature test case, some defects are found. Several improvementsolutions are proposed and verified till the final solution is decided.Brightness is the key parameters of projector. The incensement ofoptical efficiency of LED will benefit for the brightness of projector, but itintroduces the thermal issue as well. The discussion of heat dissipationdesign and improvement will be continued for the development of pico-projector.