Great to see both “side by side” on the same video. Your way of presenting and comments are very pleasant to see. That part of dichroic glasses and the light representation turned out a beautiful insight. May I suggest you to include a few seconds along the narrative to include (@ post producing) some macro photos, or eventually microscope-based photos - probably a digital camera with enough MPx and zoom in would work fine. This could bring us to better witness such beauties of the LCD and DLP. Thanks for sharing
I remember the laptop screen projector using a OHP! I was SO impressed the first time I saw it :O It was some lecture we attended in school, I forget the topic, I just remember it was a physics lecture, and the classic OHP was rolled out, and then this glass panel placed on top :O
I have hitachi cpx 4015 wn projector it shows pendrive all files audio files plays smoothly but when i click on the video it open same screen again. not playing video
Awesome video! I actually owned a CRT projector (bought used on eBay) in the early 2000's. I'm not surprised that the ones you saw had bad color convergence. I remember that calibrating it took hours, but it was worth it. The image was silky smooth... almost like film. Too bad it weighed about 200 lbs.
Hmm, We had a 3-CRT projector and it had a switch on it to turn the display into "cross hair" so you could adjust the alignment with a set of 4 potentiometers (1 color was fixed and you could adjust the x & Y of the other 2 colors to align them), It only took seconds to align. When it got old, however, it would randomly jump out of alignment, and even got to where you could no longer align it, I think it was the red tube would 'jump' left & right so it wouldn't stay aligned. looking back now, it probably just needed the potentiometers replaced.
they were very heavy and very bulky, but had amazing image quality. recall conferences where they started an hour earlier just to adjust the crt projector they brought. wished I owned one but never got around to buy any. now tvs are large enough for my use.
Does anyone know how they compare with power consumption? I can imagine newer LED and LASER based projectors are much better, but I can't quite place in my mind if high power CRT would be more efficient than HID lamp and LCD?
Not liquid spillage, this is caused by hours of intense heat cooking the glues and plastic surfaces. A blister is formed and that avalanches causing the damage you saw and the glue eventually gets so brittle the lens falls apart. Green is the center LCD and blue is the one the farthest away. You will see there are extra lenses to intensify the blue light path since human eyes have problems with blue. The fact that blue is amplified it will quickly burn the LCD or the polarizer plates causing discoloration on the screen. LCD also suffered from dust contamination since the light path was exposed. The next step between these two technologies was the introduction of a colored LCD panel in a very small form-factor and quite inexpensive. This allowed a single LCD to produce the full picture and thus eliminating the need for splitting the white light. short light path, less dust, but lousy picture quality.
Thanks Dan, that makes a lot of sense. Do you think the inclusion of a cold mirror might help the longevity of an LCD projector by rejecting a lot of heat at the begining of the light path?
I didn't mention that there are professional DLP projectors that use 3 DLP chips, one per colour. These would need combined optically like the LCD. As you say these would be pretty big (I think this is what Cinemas often use now). I don't know of LCDs as small as the single chip DLP? Do you know of an example, or how they manage to be so small?
@@a531016 Most of the Epson powerlite projectors are fairly small and lite. usually these are smaller as the optics are much simpler and cheaper then what was shown here. The Powerlites (1715c) I've taken apart all have shorter and narrower light paths. still the same setup, just smaller.
@@brianhoehn949 what is it that makes the difference? Pixel density of the LCDs? I might see if we can do a follow up with a more modern LCD and a LASER?
@@a531016 as far as I know you can get LCD and DLP with similar specs in a similar form factor. I personally prefer LCD(brighter image for the same light power) and less moving parts. I think DLPs tend to be cheaper but I haven't looked at them in awhile.
@@a531016 I would love to see a Laser projector. I haven't got to play with one. They're more expensive then a LCD (about $2000 more for an EPSON at education pricing(more for commercial). So they're really only worth it if you need a maintenance free device. Edit: I'm talking about a large venue projector. You can get smaller ones for a little cheaper. but the price has come down a lot in the last year.
DLP may be amazing, but the picture quality is inferior to LCD. Size of the units vary - some of the Epsons are still huge, but there are some Epson 3-LCD units that are no bigger than the competing DLP ones, and the price is about the same for equivalent resolution and features. And LCD image quality is superior to DLP in every way. Better contrast, better color, everything.
Great to see both “side by side” on the same video. Your way of presenting and comments are very pleasant to see. That part of dichroic glasses and the light representation turned out a beautiful insight.
May I suggest you to include a few seconds along the narrative to include (@ post producing) some macro photos, or eventually microscope-based photos - probably a digital camera with enough MPx and zoom in would work fine. This could bring us to better witness such beauties of the LCD and DLP.
Thanks for sharing
I remember the laptop screen projector using a OHP! I was SO impressed the first time I saw it :O It was some lecture we attended in school, I forget the topic, I just remember it was a physics lecture, and the classic OHP was rolled out, and then this glass panel placed on top :O
Same, we used it in Physics too! I just wish I could remember what it was called to find some info about it?!
I have hitachi cpx 4015 wn projector it shows pendrive all files audio files plays smoothly but when i click on the video it open same screen again. not playing video
wow amazing, i always thought that the LCD's themselves were colored. Projectors never cease to amaze me.
I really enjoy your videos!
siempre me dio curiosidad como funcionan!! Gracias por mostrarlo y explicar tan claro!! seguí así
Gracias eres bienvenido! (Google Translated)
Awesome video! I actually owned a CRT projector (bought used on eBay) in the early 2000's. I'm not surprised that the ones you saw had bad color convergence. I remember that calibrating it took hours, but it was worth it. The image was silky smooth... almost like film. Too bad it weighed about 200 lbs.
Hmm, We had a 3-CRT projector and it had a switch on it to turn the display into "cross hair" so you could adjust the alignment with a set of 4 potentiometers (1 color was fixed and you could adjust the x & Y of the other 2 colors to align them), It only took seconds to align. When it got old, however, it would randomly jump out of alignment, and even got to where you could no longer align it, I think it was the red tube would 'jump' left & right so it wouldn't stay aligned. looking back now, it probably just needed the potentiometers replaced.
they were very heavy and very bulky, but had amazing image quality. recall conferences where they started an hour earlier just to adjust the crt projector they brought. wished I owned one but never got around to buy any. now tvs are large enough for my use.
Does anyone know how they compare with power consumption? I can imagine newer LED and LASER based projectors are much better, but I can't quite place in my mind if high power CRT would be more efficient than HID lamp and LCD?
16:45 The opposite of Monochromatic is Polychromatic
Thank you!
We were using those 90’s lcd projectors in 2011 at my highschool 😂
How about a cell phone sized projector
Not liquid spillage, this is caused by hours of intense heat cooking the glues and plastic surfaces. A blister is formed and that avalanches causing the damage you saw and the glue eventually gets so brittle the lens falls apart.
Green is the center LCD and blue is the one the farthest away. You will see there are extra lenses to intensify the blue light path since human eyes have problems with blue. The fact that blue is amplified it will quickly burn the LCD or the polarizer plates causing discoloration on the screen.
LCD also suffered from dust contamination since the light path was exposed. The next step between these two technologies was the introduction of a colored LCD panel in a very small form-factor and quite inexpensive. This allowed a single LCD to produce the full picture and thus eliminating the need for splitting the white light. short light path, less dust, but lousy picture quality.
Thanks Dan, that makes a lot of sense. Do you think the inclusion of a cold mirror might help the longevity of an LCD projector by rejecting a lot of heat at the begining of the light path?
10:39 hehehe 👁
If you search by datashow overhead projector, think is what was used in schools in the old days
Not all LCD projectors are big and bulky. From what I've seen there isn't much difference between the two as far as size and weight goes.
I didn't mention that there are professional DLP projectors that use 3 DLP chips, one per colour. These would need combined optically like the LCD. As you say these would be pretty big (I think this is what Cinemas often use now). I don't know of LCDs as small as the single chip DLP? Do you know of an example, or how they manage to be so small?
@@a531016 Most of the Epson powerlite projectors are fairly small and lite. usually these are smaller as the optics are much simpler and cheaper then what was shown here. The Powerlites (1715c) I've taken apart all have shorter and narrower light paths. still the same setup, just smaller.
@@brianhoehn949 what is it that makes the difference? Pixel density of the LCDs? I might see if we can do a follow up with a more modern LCD and a LASER?
@@a531016 as far as I know you can get LCD and DLP with similar specs in a similar form factor. I personally prefer LCD(brighter image for the same light power) and less moving parts. I think DLPs tend to be cheaper but I haven't looked at them in awhile.
@@a531016 I would love to see a Laser projector. I haven't got to play with one. They're more expensive then a LCD (about $2000 more for an EPSON at education pricing(more for commercial). So they're really only worth it if you need a maintenance free device. Edit: I'm talking about a large venue projector. You can get smaller ones for a little cheaper. but the price has come down a lot in the last year.
"Labyrinth" would be known as the light engine
Ahhh, I didn't know that! Is that common to all projector types?
There are LED projector with les complicated components and very cheap and good image quality, it can beam up to 4k
You could have added LED projector too
Things are moving towards a LASER projection based TV projector.
Here’s a short video of one of the lcd projector panels. I totally remember these from 1994-1995. th-cam.com/video/BITINH06Wbo/w-d-xo.html
Good
DLP may be amazing, but the picture quality is inferior to LCD. Size of the units vary - some of the Epsons are still huge, but there are some Epson 3-LCD units that are no bigger than the competing DLP ones, and the price is about the same for equivalent resolution and features. And LCD image quality is superior to DLP in every way. Better contrast, better color, everything.
How is the epson 1060 compared to optoma hd243x