Uh, I think I'd disagree as to who's the asshole here. I'll take logical thought and decipherable misspelling over vitriol and foul language every time...
MDD
I see what you mean about the number of people "correcting" you on the color wheel. BT-DT.
And yeah, the 0.02ms number is almost certainly coming from the mirror tilt frequency limit on the chip. And the guy is likely flat out wrong, as I'd be surprised if the LEDs are being pulsed at 50KHz. They are almost certainly being pulsed somewhat slower, maybe a few hundred to a thousand (or so) hertz. So the actual response time is much harder to describe. While the LEDs are on, the response time is is however fast you can change the duty cycle on the mirror. If your mirror tilt frequency is 50KHz, then that would be 0.02ms. But when the LEDs are off, the response time is, uh, infinite.
And btw, this problem describing the response time isn't specific to LED illuminated DLPs. IIRC, the common lamp illuminated DLPs (like in TVs) are high-intensity discharge (HID) lamps, which have blink, too. And there's the color wheel, too.
About the only place where the DLP response time would be *consistently* 0.02ms is in a cinema setting. In a cinema installation, a large incandescent bulb is used (continuous white light), a color splitting/combining prism is used, and three DLPs are used. So no blinking light source, and no color wheel.
Actually, using LEDs there won't be any color wheel (and no rainbow effect either). So the response time will be limited either by the mirror tilt frequency limits (usually in the 50 KHz range) or by the LED pulse rate. I'm assuming that the LEDs are high-brightness single color LEDs, and will therefore be pulsed (instead of continuously on) for thermal management purposes.
I'm entirely free to share it with other people so long as I'm not breaking other laws by doing so (e.g. - committing fraud, espionage, etc.).
IANAL, but under U.S. copyright law the writer of the letter (or email in this case) is the copyright holder. So you may need to get the author's permission to re-publish. See: Salinger v. Random House, Inc., 811 F.2d 90 (2d Cir. 1987).
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Uh, I think I'd disagree as to who's the asshole here. I'll take logical thought and decipherable misspelling over vitriol and foul language every time...
MDD
I see what you mean about the number of people "correcting" you on the color wheel. BT-DT.
And yeah, the 0.02ms number is almost certainly coming from the mirror tilt frequency limit on the chip. And the guy is likely flat out wrong, as I'd be surprised if the LEDs are being pulsed at 50KHz. They are almost certainly being pulsed somewhat slower, maybe a few hundred to a thousand (or so) hertz. So the actual response time is much harder to describe. While the LEDs are on, the response time is is however fast you can change the duty cycle on the mirror. If your mirror tilt frequency is 50KHz, then that would be 0.02ms. But when the LEDs are off, the response time is, uh, infinite.
And btw, this problem describing the response time isn't specific to LED illuminated DLPs. IIRC, the common lamp illuminated DLPs (like in TVs) are high-intensity discharge (HID) lamps, which have blink, too. And there's the color wheel, too.
About the only place where the DLP response time would be *consistently* 0.02ms is in a cinema setting. In a cinema installation, a large incandescent bulb is used (continuous white light), a color splitting/combining prism is used, and three DLPs are used. So no blinking light source, and no color wheel.
MDD
Actually, using LEDs there won't be any color wheel (and no rainbow effect either). So the response time will be limited either by the mirror tilt frequency limits (usually in the 50 KHz range) or by the LED pulse rate. I'm assuming that the LEDs are high-brightness single color LEDs, and will therefore be pulsed (instead of continuously on) for thermal management purposes.
MDD
(a Texas Instruments employee)
IANAL, but under U.S. copyright law the writer of the letter (or email in this case) is the copyright holder. So you may need to get the author's permission to re-publish. See:
Salinger v. Random House, Inc., 811 F.2d 90 (2d Cir. 1987).