Practical Implementation: Phase Lock Loop and a Feedback Loop Based Full Colour Laser Tv

In Multimedia society, the needs for large area display are increasing day by day. Many kinds of projection displays are now developed such as LCD, LCOS, DMD and Laser TV. Current Laser scanning projections methodologies is not efficient from cost, weight and power perspective. In this paper we have used low commercial microcontrollers with a scanning mirror (Progressive Scanning) technology. Three laser lights blue, green and red with wavelengths 457 nm, 532 nm and 648 nm are used. Power levels of lasers are adjusted for white color balance. Phase Lock Loop (PLL) with a feedback loop is used to synchronize horizontal (high speed brush-less DC motor) and vertical mirrors (stepper motor) pulses. The resulting Laser TV assembly is more efficient in terms of cost, power and weight.