Context:
Light-emitting diodes (LEDs) succeed the incandescent bulbs and fluorescent lamps of previous centuries as the world’s light-source of choice.
Relevance:
GS III: Science and Technology
Dimensions of the Article:
- About Light-Emitting Diodes (LEDs)
- Advantages of LED
- Applications of LEDs
About Light-Emitting Diodes (LEDs):
Diode Basics:
- An electronic component with two terminals: anode and cathode.
- Primary function is to allow current flow in one direction.
LED (Light-Emitting Diode):
- A semiconductor device emitting light with electric current.
- Produces primary colors: red, green, and blue; combining LEDs creates various colors.
Advantages of LED:
Energy Efficiency:
- Uses 75-80% less energy than incandescent bulbs.
- Requires far less electricity to produce equivalent light.
Durability:
- Highly durable and resistant to shocks, vibrations, and temperature fluctuations.
Instant Illumination:
- Provides immediate illumination without warm-up time, unlike incandescent bulbs.
Low Heat Generation:
- Generates minimal heat, enhancing safety and energy efficiency.
Environmental Impact:
- Lower environmental impact compared to incandescent bulbs.
- Energy efficiency and longer lifespan contribute to reduced greenhouse gas emissions and waste.
Applications of LEDs:
- Smartphones and TVs: Used in smartphone displays and TV screens.
- Household Lighting: Widely used for energy-efficient household lighting.
- Signboards: Illuminates signboards for enhanced visibility.
- Greenhouses: Feeds plants with light, supporting growth.
- Barcode Scanners: Essential in barcode scanning technology.
- Air Quality Monitoring: Utilized in devices for monitoring air quality.
-Source: The Hindu
