Almost all manufacturers that claim 2.0 compliance use regular 1.4 chips, as a manufacturer explained to me, there is one baseline across all HDMI versions, 480P, if it can do that then it meets the standard. There is no requirement to offer the full 18 gigabit/s bandwidth.
Now this is an HD product so 1.4 can handle this just fine.
I hope Optoma learned their lesson with the HD90 and HD91. These units need to see a substantial bump in brightness (at least 300 calibrated lumens more), with MUCH better native contrast (at least 2000:1) and a good dynamic contrast implementation (to get around 10000:1 dynamically). If they can fix these three things I think this projector could be a winner for Optoma.
Possibly includes pixelworks' latest True Clarity technology.
Would be interesting to learn whether Pure Motion judder reduction will finally handle program content equally shot with a film (24 fps) or with a video camera (60 and 50 Hz).
IIRC, for 60Hz territories you could equally apply Pure Motion for film oder video recorded content (e.g. Optoma HD 8300). Unfortunately, in PAL territories (e.g. Optoma HD 83), Pure Motion was only available for program content shot on film (playback via 60 Hz Blu-ray or 50 Hz DVD and TV).
Dynamic Black IV Generation
Dynamic Black IV smoothly adjusts the lamp output automatically, based on the brightness information of each frame; to create a stunning contrast ratio. Bright scenes are crisp and clear, while dark scenes remain detailed with deep blacks which gives exceptional light and shade detail.
I am happy to see Optoma improving the light output but I was hoping for 1500 calibrated lumens on the standard lens. I will be needing something that can light-up a 150 to 160 inch 1-gain screen so it appears I will need to keep looking.
The next press release that I am interested in, is for the Benq W7500 replacement.
Which Vivitek model are you referring to? The Optoma was not even half of the rate you were expecting. I think it's going to be a number of years before we see high lumen output LEDs. Maybe by 2020 we'll have something of the sort. Even if we doubled the LEDs in the light engine (2 LEDs for each color), we'd only be getting a little bit more than 1000 lumens.
I suspect that LEDs in front projectors have seen their day. Laser is here and it can produce much more calibrated lumens than LED. The transition to laser has begun and without some technological improvements (much higher lumens) to LED it's my opinion it'll fade away over the next few years.
you're probably right for the full size models. I think the LED's will stay for a while in the PICO models. The under 1K portable LG PF1500 can crank out more calibrated lumens than the HD91 did. Optoma is going to have surpass this in this upcoming model, especially if it sells at the same price point as the HD91.
A big negative for LEDs is the very high current (but low voltage) power supply need. Expensive and impedances need to be kept very low. A blue laser/pump power supply is a piece of cake.
Yeah, the Phatlight PT120's can draw up to 30 amps at 4 volts for each LED. 120 watts each for a total of 360watts of power draw just for the LEDs. I wonder what the laser is pulling to ignite the phosphor wheel?
The Epson LS10000 in high power mode draws 459 watts. But the power to the light wheel is not high current. Its probably very low with the exciting voltage being reasonably high. A much less robust power supply is needed even if the drawn watts for each of the projectors is around the same.
I'm not an electrical engineer or anything close to it (and it surprises me that I actually know how to extrapolate wattage if the voltage and amperage is known), but considering the voltage to the LEDs is low does that still necessitate a robust power supply or does the high amperage make things more tricky? Please forgive my ignorance if this train of thought is totally wrong.
Its a first order linear equation (the extrapolation) so I am not surprised that you can do it without being an engineer.
Supplying high voltages is easy, the components are very light weight. the wires are high gage (small in carrying diameter). supplying high amperage involves large and massive everything.
I may not be the best person to answer this question and someone correct me if I am incorrect. Based on my basic electrical theory background I believe the higher voltage circuit will have less electrical losses than a high current circuit.
This quality in me is exacerbated online. In person I'm much easier to deal with as you've seen
The faceless nature of the internet does this to a lot of people who would ordinarily be much easier to deal with in person. I just like to be right, Mark. I can't help it.
I'm still using the old HD82 and have been waiting for either a big enough TV or a new projector to replace it. I feel like we already should be at 4K or using laser technology in projectors and have this feeling that I should wait a little longer...
Unless they fix the colors the HD91 came with - I have zero interest in this. They were truly horrible out of the box and even the calibrated settings are greenish and not that great looking
the problem is the color gamut was off by a good margin and the grey scale would shift during the dynamic LED dimming so it made calibration very difficult on this model.
They need to fix this first before making it brighter or claiming higher contrast. I'm curious how they are planning to do this. It had possibly one of the worst perceived black levels of any model i've seen since the $500 Acer 5360 that was released in 2010. My .95 DC4 Planar and .65 DC3 Sharp 30K are both noticeably better in this area vs. the HD91.
As to the Vivitek reference, it does have a nice LASER-Phosphor projector coming online, BRIGHT!, but it will be close to 20K, so also high priced.
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