What is an LED?. LED stands for Light Emitting Diode This is how they work…. How Diodes work. A diode allows an electric current to flow in one direction, but blocks it in the opposite direction, much like an electronic version of a check valve. . How Light Emitting Diodes work.
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LED stands for Light Emitting Diode
This is how they work…
They don't have a filament to burn out, and they don't get especially hot.
Chip size for visible signal LEDs generally fall in the range of 0.18mm square to 0.36mm square (smaller than a pin head). High power LEDs for lighting are yet larger.
The basic LED structure consists of the die, a lead frame where the die is actually placed, and the encapsulation epoxy, which surrounds and protects the die and disperses the light (see left).Internals of a Blue LED
The recess in the anvil is shaped to project the radiated light forward.
The die's top contact is wire bonded to the other lead frame terminal, the post, to complete the circuit.What about a White LED?
…with proper electrical contacts they are designed to replace
* Based on life decay model, 67-21 series lifetime can reach L70@ 25297 hr and L50@ 47466 hr under test condition of 20mA, 25 C and 60%RH.
The ultraviolet light is transformed into visible light by the phosphors on the inside of the tube. In doing so, about 80% of the energy used is released as heat not light and, in a warm climate, that increases your air conditioning costs.
lighting energy bill.