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Here I am begging again.

Re: [Wlug] Here I am begging again.

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Steven Greenberg

20 Aug 2009 20 Aug '09

6:32 p.m.

I have a Samsung SyncMaster 204B, but it is on a Windows PC. As for the frequency, 60 Hz is not good in close proximity to fluorescent lights. I had a lot of visual defects in two different units, until I changed to 120 Hz(I think). /Steve -- Steven Greenberg Email: steve@ssgreenberg.name 251 Holland Rd. Phone: (774)241-0095 Fiskdale, Massachusetts 01518-1231 Web: http://www.ssgreenberg.name Other Email: s.greenberg@ieee.org ssg@alum.mit.edu

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Richard Klein

20 Aug 20 Aug

7:04 p.m.

New subject: [Wlug] Here I am begging again.

On Thu, Aug 20, 2009 at 2:32 PM, Steven Greenberg wrote:

I have a Samsung SyncMaster 204B, but it is on a Windows PC.

As for the frequency, 60 Hz is not good in close proximity to fluorescent lights.

I had a lot of visual defects in two different units, until I changed to 120 Hz(I think).

That's true with CRTs. I think it may be less important with LCDs. I have a SyncMaster 213T at home, and if you use the DVI port you have no choice but 60 Hz. I've never noticed any flicker from it. Most of the lighting in my apartment is CFLs. -- Rich Sent from Marlborough, MA, United States

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jrm8005＠gmail.com

7:14 p.m.

New subject: [Wlug] Here I am begging again.

On Thu, Aug 20, 2009 at 2:32 PM, Steven Greenberg wrote:

...
I have a Samsung SyncMaster 204B, but it is on a Windows PC.

As for the frequency, 60 Hz is not good in close proximity to fluorescent lights.

I had a lot of visual defects in two different units, until I changed to 120 Hz(I think).

That's true with CRTs. I think it may be less important with LCDs. I have a SyncMaster 213T at home, and if you use the DVI port you have no choice but 60 Hz. I've never noticed any flicker from it. Most of the lighting in my apartment is CFLs.

The only reason CRT flicker bothers the eye is because of the time it takes the electron guns to return to the top of the screen. Since LCDs don't have an electron gun (I think the whole screen refreshes at once), the flicker is not really noticeable since there is no waiting for the gun to reposition.

-- Rich Sent from Marlborough, MA, United States _______________________________________________ Wlug mailing list Wlug@mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

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Jim Dibb

7:14 p.m.

New subject: [Wlug] Here I am begging again.

I don't think refresh rate applies to LCDs in the 'flicker' sense at all. Refresh is for scanning (crt) displays that have to keep scanning or the phosphor pixels fade out. LCD pixels are 'ON' or 'OFF' they don't fade out between refreshes. I believe the new hype on the 120 or 240 Hz refresh on big lcd tvs is all about motion interpolation, not flicker. Since the source video framerate is still only 24 or 30 Hz. On Thu, Aug 20, 2009 at 3:04 PM, Richard Klein wrote:

On Thu, Aug 20, 2009 at 2:32 PM, Steven Greenberg wrote:

...
I have a Samsung SyncMaster 204B, but it is on a Windows PC.

As for the frequency, 60 Hz is not good in close proximity to fluorescent lights.

I had a lot of visual defects in two different units, until I changed to 120 Hz(I think).

That's true with CRTs. I think it may be less important with LCDs. I have a SyncMaster 213T at home, and if you use the DVI port you have no choice but 60 Hz. I've never noticed any flicker from it. Most of the lighting in my apartment is CFLs.

-- Rich Sent from Marlborough, MA, United States _______________________________________________ Wlug mailing list Wlug@mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

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jrm8005＠gmail.com

7:18 p.m.

New subject: [Wlug] Here I am begging again.

I don't think refresh rate applies to LCDs in the 'flicker' sense at all. Refresh is for scanning (crt) displays that have to keep scanning or the phosphor pixels fade out.

LCD pixels are 'ON' or 'OFF' they don't fade out between refreshes.

I believe the new hype on the 120 or 240 Hz refresh on big lcd tvs is all about motion interpolation, not flicker. Since the source video framerate is still only 24 or 30 Hz.

Interesting!

On Thu, Aug 20, 2009 at 3:04 PM, Richard Klein wrote:

...
On Thu, Aug 20, 2009 at 2:32 PM, Steven Greenberg wrote:

...
I have a Samsung SyncMaster 204B, but it is on a Windows PC.

As for the frequency, 60 Hz is not good in close proximity to fluorescent lights.

I had a lot of visual defects in two different units, until I changed to 120 Hz(I think).

That's true with CRTs. I think it may be less important with LCDs. I have a SyncMaster 213T at home, and if you use the DVI port you have no choice but 60 Hz. I've never noticed any flicker from it. Most of the lighting in my apartment is CFLs.

-- Rich Sent from Marlborough, MA, United States _______________________________________________ Wlug mailing list Wlug@mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

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Randall Mason

7:20 p.m.

New subject: [Wlug] Here I am begging again.

I thought the whole big deal about refresh rates on LCDs is that they actually have a florescent light in the back of them that shines through the liquid crystal. I've noticed that it's less of a big deal with LCDs though... -Randall On Thu, Aug 20, 2009 at 3:14 PM, Jim Dibb wrote:

I don't think refresh rate applies to LCDs in the 'flicker' sense at all. Refresh is for scanning (crt) displays that have to keep scanning or the phosphor pixels fade out.

LCD pixels are 'ON' or 'OFF' they don't fade out between refreshes.

I believe the new hype on the 120 or 240 Hz refresh on big lcd tvs is all about motion interpolation, not flicker. Since the source video framerate is still only 24 or 30 Hz.

On Thu, Aug 20, 2009 at 3:04 PM, Richard Klein wrote:

...
On Thu, Aug 20, 2009 at 2:32 PM, Steven Greenberg wrote:

...
I have a Samsung SyncMaster 204B, but it is on a Windows PC.

As for the frequency, 60 Hz is not good in close proximity to fluorescent lights.

I had a lot of visual defects in two different units, until I changed to 120 Hz(I think).

That's true with CRTs. I think it may be less important with LCDs. I have a SyncMaster 213T at home, and if you use the DVI port you have no choice but 60 Hz. I've never noticed any flicker from it. Most of the lighting in my apartment is CFLs.

-- Rich Sent from Marlborough, MA, United States _______________________________________________ Wlug mailing list Wlug@mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

_______________________________________________ Wlug mailing list Wlug@mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

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Randall Mason

7:24 p.m.

New subject: [Wlug] Here I am begging again.

http://solutions.3m.com/wps/portal/3M/en_US/Vikuiti1/BrandProducts/secondary... And click on Navigation and choose "Backlight". -Randall On Thu, Aug 20, 2009 at 3:20 PM, Randall Mason wrote:

I thought the whole big deal about refresh rates on LCDs is that they actually have a florescent light in the back of them that shines through the liquid crystal.

I've noticed that it's less of a big deal with LCDs though...

-Randall

On Thu, Aug 20, 2009 at 3:14 PM, Jim Dibb wrote:

...
I don't think refresh rate applies to LCDs in the 'flicker' sense at all. Refresh is for scanning (crt) displays that have to keep scanning or the phosphor pixels fade out.

LCD pixels are 'ON' or 'OFF' they don't fade out between refreshes.

I believe the new hype on the 120 or 240 Hz refresh on big lcd tvs is all about motion interpolation, not flicker. Since the source video framerate is still only 24 or 30 Hz.

On Thu, Aug 20, 2009 at 3:04 PM, Richard Klein wrote:

...
On Thu, Aug 20, 2009 at 2:32 PM, Steven Greenberg wrote:

...
I have a Samsung SyncMaster 204B, but it is on a Windows PC.

As for the frequency, 60 Hz is not good in close proximity to fluorescent lights.

I had a lot of visual defects in two different units, until I changed to 120 Hz(I think).

That's true with CRTs. I think it may be less important with LCDs. I have a SyncMaster 213T at home, and if you use the DVI port you have no choice but 60 Hz. I've never noticed any flicker from it. Most of the lighting in my apartment is CFLs.

-- Rich Sent from Marlborough, MA, United States _______________________________________________ Wlug mailing list Wlug@mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

_______________________________________________ Wlug mailing list Wlug@mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

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jrm8005＠gmail.com

7:24 p.m.

New subject: [Wlug] Here I am begging again.

I thought the whole big deal about refresh rates on LCDs is that they actually have a florescent light in the back of them that shines through the liquid crystal.

I've noticed that it's less of a big deal with LCDs though...

I have an LCD that uses LED backlighting, but it still has a refresh rate.

-Randall

On Thu, Aug 20, 2009 at 3:14 PM, Jim Dibb wrote:

...
I don't think refresh rate applies to LCDs in the 'flicker' sense at all. Refresh is for scanning (crt) displays that have to keep scanning or the phosphor pixels fade out.

LCD pixels are 'ON' or 'OFF' they don't fade out between refreshes.

I believe the new hype on the 120 or 240 Hz refresh on big lcd tvs is all about motion interpolation, not flicker. Since the source video framerate is still only 24 or 30 Hz.

On Thu, Aug 20, 2009 at 3:04 PM, Richard Klein wrote:

...
On Thu, Aug 20, 2009 at 2:32 PM, Steven Greenberg wrote:

...
I have a Samsung SyncMaster 204B, but it is on a Windows PC.

As for the frequency, 60 Hz is not good in close proximity to fluorescent lights.

I had a lot of visual defects in two different units, until I changed to 120 Hz(I think).

That's true with CRTs. I think it may be less important with LCDs. I have a SyncMaster 213T at home, and if you use the DVI port you have no choice but 60 Hz. I've never noticed any flicker from it. Most of the lighting in my apartment is CFLs.

-- Rich Sent from Marlborough, MA, United States _______________________________________________ Wlug mailing list Wlug@mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

_______________________________________________ Wlug mailing list Wlug@mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

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Jim Dibb
jrm8005＠gmail.com
Randall Mason
Richard Klein
Steven Greenberg