Difference between LED and LCD:
The Difference between LED and LCD is given in table below
Light Emitting Diode – LED |
Liquid Crystal Display – LCD |
| Needs more power (10-250 mW per digit). | Essentially acts as a capacitor and needs very less power (10-20 μW per digit). |
| Because of high power need, it needs external interface circuitry when driven from ICs. | Can be driven directly from IC chips. |
| Operating voltage range is 1.5 to 5 V dc. | Operating voltage range is 3-20 V ac. |
| Lifetime is about 100,000 hours. | Lifetime is limited to 50,000 hours due to its chemical degradation. |
| Good brightness level. | Moderate brightness level. |
| Temperature range for operation is -40 to 85°C | Temperature range limited to -20 to 60°C. |
| Emits light in red, orange, yellow, green, blue and white. | Invisible in darkness-needs external or internal light source. |
| Response time is 50-500 ns | Response time is 50-200 ms. Because of slow decay time, one can even observe the fading out of segments when switched off. |
| Viewing angle is 150°. | Viewing angle is 100°. |
| Font style : 7-16 segments; dot matrix | Font style : 7-16 segments; dot matrix. |