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post #11 of 13
Hey

If you read the article posted above/ have knowledge of the technologies anyway you will find that response time in a crt is totally irellevant because of the way it works.

as CRT shoots electrons at the screen which effectively decay in a really tiny amount of time. Therefore a crt must refresh the image many times a second to remain constant.

The particles in an LCD take longer to disappear and so have to be manually switched from one colour to another, the speed at which it does this is your response time.

If you REALLY wanted to directly compare the two then the response time of a crt would effectively be the same as the refresh rate i.e. 60hz would be 60 refreshes a second so 1 refresh takes .01 of a second. 1 millisecond = 0.001 seconds so at 60 HZ the theoretical response time is 10ms.

HOWEVER, you really can't compare the two because they are different technologies and LCD bought in the concept of "response time" and it can't really be applied to CRT as response time means how long it takes to change a pixel of one colour to a pixel of a different colour whereas in a CRT the "pixel" automatically changes to black almost immediately thus in a CRT you are looking at how fast the ray-gun can replace the black space with another colour e.g. its refresh rate not response time.

Furthermore, response time is there to let you know how likely ghosting will occur i.e. "blending" with the previous picture on the screen, well on a crt the previous picture would be a blank screen so "ghosting" would be seen as flickering, not ghosting

Correct me if i'm wrong here guys just what I remember from back in the CRT/LCD changeover days
    
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post #12 of 13
Thread Starter 
Quote:
Originally Posted by anadalite View Post
Hey

If you read the article posted above/ have knowledge of the technologies anyway you will find that response time in a crt is totally irellevant because of the way it works.

as CRT shoots electrons at the screen which effectively decay in a really tiny amount of time. Therefore a crt must refresh the image many times a second to remain constant.

The particles in an LCD take longer to disappear and so have to be manually switched from one colour to another, the speed at which it does this is your response time.

If you REALLY wanted to directly compare the two then the response time of a crt would effectively be the same as the refresh rate i.e. 60hz would be 60 refreshes a second so 1 refresh takes .01 of a second. 1 millisecond = 0.001 seconds so at 60 HZ the theoretical response time is 10ms.

HOWEVER, you really can't compare the two because they are different technologies and LCD bought in the concept of "response time" and it can't really be applied to CRT as response time means how long it takes to change a pixel of one colour to a pixel of a different colour whereas in a CRT the "pixel" automatically changes to black almost immediately thus in a CRT you are looking at how fast the ray-gun can replace the black space with another colour e.g. its refresh rate not response time.

Furthermore, response time is there to let you know how likely ghosting will occur i.e. "blending" with the previous picture on the screen, well on a crt the previous picture would be a blank screen so "ghosting" would be seen as flickering, not ghosting

Correct me if i'm wrong here guys just what I remember from back in the CRT/LCD changeover days
Yeah I was thinking about that at work. If I'm running 100hz fresh rate how do I calculate the time the gun refreshes the pixel?
 
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post #13 of 13
Quote:
Originally Posted by Unknownm View Post
Yeah I was thinking about that at work. If I'm running 100hz fresh rate how do I calculate the time the gun refreshes the pixel?
It refreshes the screen at 100hz (100 times a second), but the delay from your computer to the monitor is less than a millisecond.
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