High Definition Television Using Led and Laser Beams

High definition televisions are in a great demand these days. The new technologies have diverted the focus of viewers from Black and White to Color picture that has far better resolution and picture quality.

Today, these high definition televisions have gone into more sophisticated system. So, the manufacturers have given more attention to the appearance of the picture on the screen using various color schemes. Consequently, the vast change made into this field is the replacement of tubes or bulbs that give off white light that filtered into primary colors and remixed with Lasers and Light Emitting Diodes or LEDs.

The idea to replace these lamps with LEDs or Lasers is to get much better color saturation with an efficient design.

These optical components do not beam white light, but rather its basic three building blocks: red, green and blue. Beams are emitted in narrow beam of wavelengths near to those of single, pure colors, giving off the brilliant, saturated red of a blazing sunset or the glittering, luminous blue of a rainbow. Beam these three primary colors in various intensities at one spot on the television screen, and a palette of hues can be created in a wider range than in TVs without this technology.

The utilization of such components have added to an advantage besides excellent resolution, reduced flickering problem, and improved brightness and color contrast that the LEDs are expected to last the lifetime of TVs than the previous bulbs which require replacement in every few years. Moreover, the cost in manufacturing is also decreased since LEDs are highly inexpensive as compared to the bulbs or tubes.

Author: Gary Jones (Component Engr.)
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