Sharp RGBY Televisions
in [Design]
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From: osr on 30 Mar 2010 01:29 Don, depending on what KR:AR ratio I use when I fill the tube, the magnet settings, and optics, I can get: 457 476 482 488 496 504 514.5 520 528 530 568 575 630 (largeframe KR only) 647 676 690 And in Europe, where stringent safety precautions are taken, you have laser shows that can dip into the crowd, at roughly 10 times the US Max MPE, see: http://www.youtube.com/watch?v=mL3hXejfxtA Done properly, with TUV, etc approval, its safe and a very beautiful effect.. Steve
From: AnimalMagic on 30 Mar 2010 01:39 On Mon, 29 Mar 2010 22:29:21 -0700 (PDT), osr(a)uakron.edu wrote: >And in Europe, where stringent safety precautions are taken, you have >laser shows that can dip into the crowd, at roughly 10 times the US >Max MPE, see: You can thank Pink Floyd for that.
From: osr on 30 Mar 2010 08:47 On Mar 30, 1:39 am, AnimalMagic <AnimalMa...(a)petersbackyard.org> wrote: > On Mon, 29 Mar 2010 22:29:21 -0700 (PDT), o...(a)uakron.edu wrote: > >And in Europe, where stringent safety precautions are taken, you have > >laser shows that can dip into the crowd, at roughly 10 times the US > >Max MPE, see: > > You can thank Pink Floyd for that. In the over all history PF comes off as very safe and responsible with lasers. The worse offender was actually Blue Oyster Cult and mainly a fellow named David Infante... Its becoming more of a issue now because of cheap Chinese solid state lasers sold illegally to people without variances, and the federal regulatory agency involved has maybe 10 employees nationwide assigned to non ionizing safety, not just lasers.. The thing is saving a lot of eyesight is poor QC by the Chinese. Five years ago you needed someone like me to keep anything over 100 mW going, ie ion lasers require adjustment and training and TLC. . Now you can get a Chinese solid state box for starting prices of 400$ and up with powers starting at 100 mW and climbing as high as 3 watts, at prices clubs can make in 2 nights. Imported, illegally, as a "power supply" on the customs declaration. Laser shows are a huge business in Europe, and South America/Asia , but not here, because of the regulatory climate. We have the most draconian rules on the planet, but they are selectively enforced. If I do a show I have to report it and have insurance, because I will have a corporate client who dreads liability. So who gets inspected/ checked? Me. Who doesn't? The guy who spends 2000$ for a one watt box , no safety training, and has no skill in performing shows... &^ %#* it... Eye surgery lasers start doing tissue damage at about 50-75 mW. And that person will audience scan, without calculating MPEs and with static beams, and someone will get hurt...... Problem is, the eye damage mechanism is not so painful if your drunk... If you do not get a direct hit to the nerve, The brain will " stitch in" the damage over night and you wont know you have a problem till the truck hits you, or you cant read.... Steve
From: Bill Martin on 30 Mar 2010 14:33 Archimedes' Lever wrote: > On Sun, 28 Mar 2010 22:45:46 -0700 (PDT), "miso(a)sushi.com" > <miso(a)sushi.com> wrote: > >> Part of the problem with LCD is the backlight spectrum. The LED >> backlights are lower power, but the color is poor. > > This is why OLED is in our true future, but Sharp wants you to think > about that future with pixels comprised of four sources, not three. > > I like it. Sight unseen. Just knowing what is involved. > > Look what the printer boys have done. But that is CMYK, the inverse of RGB plus real black. An extra way to make yellow seems redundant. bill
From: Archimedes' Lever on 30 Mar 2010 19:26
On Tue, 30 Mar 2010 11:33:45 -0700, Bill Martin <wwm(a)wwmartin.net> wrote: >Archimedes' Lever wrote: >> On Sun, 28 Mar 2010 22:45:46 -0700 (PDT), "miso(a)sushi.com" >> <miso(a)sushi.com> wrote: >> >>> Part of the problem with LCD is the backlight spectrum. The LED >>> backlights are lower power, but the color is poor. >> >> This is why OLED is in our true future, but Sharp wants you to think >> about that future with pixels comprised of four sources, not three. >> >> I like it. Sight unseen. Just knowing what is involved. >> >> Look what the printer boys have done. >But that is CMYK, the inverse of RGB plus real black. An extra way to >make yellow seems redundant. > >bill You missed the point. Several printer makers now have five, six, or even seven ink 'colors' to make their print jobs more accurate. |