How many LED elements have been produced since year 2000 ?
This came up in a discussion last night, no one could even guess how many.
This came up in a discussion last night, no one could even guess how many.
How many LEDs have been produced ? (
- Thread starter bernardgreen
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Centillions, surely?
a) 350M per week?
b) Even more than the number of Zimdollars you would need to buy a family house with a decent sized garden in central London?
b) Even more than the number of Zimdollars you would need to buy a family house with a decent sized garden in central London?
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x the answer is always x but no idea of the value of x, seems to change with every sum I did at school.
To be more to the point, how do you define between a light and an indicator? my wife complains about how many mainly blue LED's light up her bedroom, forgetting the TV which has some 1.5k LED's in the room I am in there are 7 little LED's on at the moment, plus a light bulb which likely has an array of LED's not just one single unit. Also not all LED's give off any light, optical isolators have LED's but you can't see them.
As to if diodes emit light when that light is not used I am not sure. I know the diode valve gave out a red glow from the heater. Is that classed as a LED? Is the cathode ray tube a LED? The electrons only go in one direction, it does not have a grid, so I suppose it is a diode? When it had a grid we called it a triode, however some alternator manufacturers called the three diodes used to power the AVR a triode as well. At least Delco Remy did.
I remember as a kid trying to make a radio using the yellow streak you found in some lumps of coal. Never though of putting power though the coal to see if it gave off light. I am sure it would with enough power, but as to if that's a LED or just a bit of coal burning I don't know?
To be more to the point, how do you define between a light and an indicator? my wife complains about how many mainly blue LED's light up her bedroom, forgetting the TV which has some 1.5k LED's in the room I am in there are 7 little LED's on at the moment, plus a light bulb which likely has an array of LED's not just one single unit. Also not all LED's give off any light, optical isolators have LED's but you can't see them.
As to if diodes emit light when that light is not used I am not sure. I know the diode valve gave out a red glow from the heater. Is that classed as a LED? Is the cathode ray tube a LED? The electrons only go in one direction, it does not have a grid, so I suppose it is a diode? When it had a grid we called it a triode, however some alternator manufacturers called the three diodes used to power the AVR a triode as well. At least Delco Remy did.
I remember as a kid trying to make a radio using the yellow streak you found in some lumps of coal. Never though of putting power though the coal to see if it gave off light. I am sure it would with enough power, but as to if that's a LED or just a bit of coal burning I don't know?
Mine are more sensible than that. If one switches to standby, a red indicator comes on - indicating that, although there is no picture, the TV is in standby mode, not "off". That seems fair enough. When there is a picture, there is no indicator light at all.
Kind Regards, John
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