P3 burn-in concerns?
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Now that the P3 is my favourite accessory, I've wondered about this.
If I leave it on for hours, maybe even days, is there any danger of 'burn-in' or eventual fade-out like there used to be on the old CRT devices? Ralph, VE7XF ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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>No. The only possible issue is backlight failure, just like your computer or
>TV screen. Tnx, Ron, just what I was hoping to hear. I usually turn the radio on in the morning, and off in the evening, longer periods only in a contest. Should I be concerned about the backlight? I've only had two burn out, one in a laptop (NEC) and one on a desktop monitor (Dell). I would suppose that the entire display module would have to be replaced. Ralph, VE7XF ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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That would depend if the backlight is LED or cold cathode. I service
equipment with LCD displays with both types of backlights and burnout is very very rare. on small screens like the P3 the light is not being pushed hard and should last a long long time. As for burn in. One of our machines with a 14 inch LCD display does in fact burn in. It takes a many months of displaying the same image 24/7. The customer never sees the burn as that part of the screen never changes. but with the different screens I use in diagnostics I can see it. If I leave it on a full white screen over night it disapears and doesnt seem to come back for another several months so the burn in seems to not be permanent. on the P3 I doubt this will ever be an issue. David Moes [hidden email] VE3DVY On 3/11/2013 6:39 PM, Ralph Parker wrote: >> No. The only possible issue is backlight failure, just like your computer or >> TV screen. > Tnx, Ron, just what I was hoping to hear. > I usually turn the radio on in the morning, and off in the evening, longer > periods only in a contest. > > Should I be concerned about the backlight? I've only had two burn out, one > in a laptop (NEC) and one on a desktop monitor (Dell). > I would suppose that the entire display module would have to be replaced. > > Ralph, VE7XF > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Many times when the "backlight burns out" on a computer monitor it is not the backlight at
all, but rather the switching supply for the backlight that's failed. I've fixed a couple of these. On 3/11/2013 7:12 PM, david Moes wrote: > That would depend if the backlight is LED or cold cathode. I service equipment with > LCD displays with both types of backlights and burnout is very very rare. on small > screens like the P3 the light is not being pushed hard and should last a long long time. > > As for burn in. One of our machines with a 14 inch LCD display does in fact burn > in. It takes a many months of displaying the same image 24/7. The customer never > sees the burn as that part of the screen never changes. but with the different screens > I use in diagnostics I can see it. If I leave it on a full white screen over night > it disapears and doesnt seem to come back for another several months so the burn in > seems to not be permanent. on the P3 I doubt this will ever be an issue. > > David Moes > > [hidden email] > VE3DVY > > On 3/11/2013 6:39 PM, Ralph Parker wrote: >>> No. The only possible issue is backlight failure, just like your computer or >>> TV screen. >> Tnx, Ron, just what I was hoping to hear. >> I usually turn the radio on in the morning, and off in the evening, longer >> periods only in a contest. >> >> Should I be concerned about the backlight? I've only had two burn out, one >> in a laptop (NEC) and one on a desktop monitor (Dell). >> I would suppose that the entire display module would have to be replaced. >> >> Ralph, VE7XF >> -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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The data sheet for the display we're using specifies an LED lifetime of
10,000 hours minimum. I expect that's probably a conservative spec. I've had mine on for thousands of hours so far with no noticeable change. Alan N1AL On 3/11/2013 10:42 PM, Ron D'Eau Claire wrote: > I'm not certain, but I believe the backlight on the P3 is an LED panel. > Whatever it is it's in integral part of a sandwich about 0.2 inches thick > comprising the whole display. > > 73 Ron AC7AC > > -----Original Message----- > From: [hidden email] > [mailto:[hidden email]] On Behalf Of Vic K2VCO > Sent: Monday, March 11, 2013 9:40 PM > To: [hidden email] > Subject: Re: [Elecraft] P3 burn-in concerns? > > Many times when the "backlight burns out" on a computer monitor it is not > the backlight at all, but rather the switching supply for the backlight > that's failed. I've fixed a couple of these. > > On 3/11/2013 7:12 PM, david Moes wrote: >> That would depend if the backlight is LED or cold cathode. I service > equipment with >> LCD displays with both types of backlights and burnout is very very rare. > on small >> screens like the P3 the light is not being pushed hard and should last a > long long time. >> >> As for burn in. One of our machines with a 14 inch LCD display does in > fact burn >> in. It takes a many months of displaying the same image 24/7. The > customer never >> sees the burn as that part of the screen never changes. but with the > different screens >> I use in diagnostics I can see it. If I leave it on a full white > screen over night >> it disapears and doesnt seem to come back for another several months so > the burn in >> seems to not be permanent. on the P3 I doubt this will ever be an > issue. >> >> David Moes >> >> [hidden email] >> VE3DVY >> >> On 3/11/2013 6:39 PM, Ralph Parker wrote: >>>> No. The only possible issue is backlight failure, just like your >>>> computer or TV screen. >>> Tnx, Ron, just what I was hoping to hear. >>> I usually turn the radio on in the morning, and off in the evening, >>> longer periods only in a contest. >>> >>> Should I be concerned about the backlight? I've only had two burn >>> out, one in a laptop (NEC) and one on a desktop monitor (Dell). >>> I would suppose that the entire display module would have to be replaced. >>> >>> Ralph, VE7XF >>> > > -- > Vic, K2VCO > Fresno CA > http://www.qsl.net/k2vco/ > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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The lumen output of LEDs decrease over time. The lifetime usually refers
to the time to some specified depreciation, such as 80% of original output. Since 20% reduction in lumens is barely noticeable (eyes are not linear), 10K hours has little to do with the useable life of the product. Further, that rating is at a specified current and temperature. So, if the device is not run at maximums, the life extends dramatically. Conclusion: I expect to be long dead before the display poops out! 73, Josh W6XU On 3/11/2013 11:32 PM, Alan Bloom wrote: > The data sheet for the display we're using specifies an LED lifetime > of 10,000 hours minimum. I expect that's probably a conservative > spec. I've had mine on for thousands of hours so far with no > noticeable change. > > Alan N1AL ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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