In/Gan Research Paper
is a mix of Gallium Nitride and Indium Nitride. The ratio of In/Ga is usually between 0.02/0.98 to 0.3/0.7. The InGaN when coated with phosphor, converts some of the blue color into yellow color, which in turn combine to generate white light in the LED. The wavelength of the light emitted from the LED is dependent on the GaN/InN ratio. The thickness of the InGaN layer ranges from 2-3nm.
In order to generate yellow color, more phosphor or a combination of phosphor on the InGaN is used. This would convert some of the blue light into red light, which would in turn combine to generate yellow light.
IV. COLOR CHANGING LAMP
Most of the times we would find people having lamps of both colors i.e. warm white and cool white in their rooms. The color
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Resistors R3 and R8 act as potential dividers. When the first trigger is made a potential drop develops across them. This potential drop would charge the capacitor C2 to its maximum value. A potential drop also develops generated across R1 and R2, this would generate a potential drop across the base of the transistor. When the supply is turned off, the capacitor C2 would start discharging through the emitter of the transistor developing a potential drop across it. As a result of turning of the supply the potential drop across R1 and R2 also starts decreasing. As a result of discharging, as soon as the potential across the emitter is greater than the potential across the base of the transistor, the transistor starts behaving like a forward biased diode and starts conducting. The current generates a potential drop across R6. This potential drop if greater than the minimum gate trigger voltage of the thyristor, the thyristor is triggered. If there is an external trigger in the particular time frame, the current will start flowing through the anode of the thyristor latching it to the ground and completing the circuit. As a result LED 2 will start glowing. Since the anode of the thyristor gets latched, the MOSFET gets grounded as result of which LED 1 would not glow while LED 2 is
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