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LCD display brightness question

R

RU482

Lifer
when speaking of the brightness of an LCD display, is there a conversion between "nits" and "cd/m²", or are they the same thing?
 
While we're on the subject, I know that cd/m² means candelas per square meter. I have it in my head that a candela is equivalent to one candle power (i.e., the light one candle would put out). Is this correct? I've wondered about that for awhile.
 
A candela is a measurement of luminous intensity - essentially the intensity of a beam of light.

Originally the candela was defined in terms of the 'standard candle' which was a type of electric light bulb built to precise specifications - hence the name candlepower. These days the definition is somewhat more scientific.

A candela is defined as '1 lumen per steradian'. The lumen is a measure of the total amount of light (compensated for the sensitivity of the human eye), and a steradian is a measurement of solid angles (approximately equal to 10000 square degrees).

Take a standard 100 W light bulb - this produces about 1000 lumens of light and distributes them relatively evenly (there are 12.6 (4p) steradians in a sphere) , so it produces a luminous intensity of about 80 Cd. If you took that same light bulb but put a reflector around it, so that the light came out in a narrow 20 degree beam, then the luminous intensity would be higher (about 10000 Cd).
 
Originally posted by: Mark R
A candela is a measurement of luminous intensity - essentially the intensity of a beam of light.

Originally the candela was defined in terms of the 'standard candle' which was a type of electric light bulb built to precise specifications - hence the name candlepower. These days the definition is somewhat more scientific.

A candela is defined as '1 lumen per steradian'. The lumen is a measure of the total amount of light (compensated for the sensitivity of the human eye), and a steradian is a measurement of solid angles (approximately equal to 10000 square degrees).

Take a standard 100 W light bulb - this produces about 1000 lumens of light and distributes them relatively evenly (there are 12.6 (4p) steradians in a sphere) , so it produces a luminous intensity of about 80 Cd. If you took that same light bulb but put a reflector around it, so that the light came out in a narrow 20 degree beam, then the luminous intensity would be higher (about 10000 Cd).
Click to expand...

I knew that.

:evil:
 
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