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RGB LED _ shyam

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This presents the working of RGB LEDs and their importance in today's technology.

This presents the working of RGB LEDs and their importance in today's technology.

Published in: Technology, Business
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  • 1. RGB LEDs RGB : Reason behind colourful world
  • 2. RGB : Red Green Blue • When using digital equipment to capture, store, modify and view photographic images, they must first be converted to a set of numbers in a process called digitization or scanning. • Digital images are composed of pixels • Types of digital images a) Black & white (different shades of grey) b) colour images (colored pixels) ‘‘Because of the way we perceive colors using three different sets of wavelengths, there are three primary colors. ’’
  • 3. COLOR IMAGES • A color image is made up of pixels each of which holds three numbers corresponding to the red, green, and blue levels of the image at a particular location. • Red, green, and blue (sometimes referred to as RGB) are the primary colors for mixing light—these so-called additive primary colors are different from the subtractive primary colors used for mixing paints (cyan, magenta, and yellow). • Any color can be created by mixing the correct amounts of red, green, and blue light. • Assuming 256 levels for each primary, each color pixel can be stored in three bytes (24 bits) of memory. This corresponds to roughly 16.7 million different possible colors. • Note that for images of the same size, a black and white version will use three times less memory than a color version.
  • 4. RGB COLOR SPACE • Most computer monitors work by specifying colors according to their red, Green, and blue components. • These three values define a 3-D color space call the RGB color space. • The RGB color space can be visualized as a cube with red varying along one axis, green varying along the second, and blue varying along the third. • Every color that can be created by mixing red, green, and blue light is located somewhere within the cube. • The images show the outside of the RGB cube viewed from two different directions.
  • 5. RGB LED An RGB LED is actually three single color LEDs (Red, Green and Blue) combined into a single package. Because of this controlling it is very similar to controlling a single color LED. The one difference is the 3 LEDs share a common anode (long lead (+)).
  • 6. EMBEDDED SYSTEMS : RGB LED • Programme: DDRB=0xff; RED : PORTB=0b00000001; _delay_ms(1000); GREEN : PORTB=0b00000100; _delay_ms(1000); BLUE : PORTB=0b00001000; _delay_ms(1000);
  • 7. PRESENTATION BY: V SHYAM PRASADA RAO AMITY INSTITUTE OF SPACE SCIENCE & TECHNOLOGY (vsprasad.10@gmail.com)

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