damn. I just called viewsonic:
"hi. I've got a really weird question I'm hoping you can help me with."
"yes?"
"Is there anyway I can see the inside of a viewsonic vg150? spec sheet, or real deal?"
"um.... I dont think so...."
"nothing I could see to give me an idea?"
"I could have an engineer call you tomorrow."
"excellent! that would be perfect!"
"ok..." [exchange contact info]
"cant thank you enough"
"sure, no problem"
Waiting for call from engineer tomorrow who can hopefully give me some pointers on dissecting the vg150 I'm planning on buying.
projectors going to be costing more than I thought. might actually have to spend real money on this. curses. might take a bit longer to get than I had hoped because of this, having to shop around now. I'm still pushing thanksgiving, but it might take a little bit longer. %@$%#@. double !%@#$%@.
"hi. I've got a really weird question I'm hoping you can help me with."
"yes?"
"Is there anyway I can see the inside of a viewsonic vg150? spec sheet, or real deal?"
"um.... I dont think so...."
"nothing I could see to give me an idea?"
"I could have an engineer call you tomorrow."
"excellent! that would be perfect!"
"ok..." [exchange contact info]
"cant thank you enough"
"sure, no problem"
Waiting for call from engineer tomorrow who can hopefully give me some pointers on dissecting the vg150 I'm planning on buying.
projectors going to be costing more than I thought. might actually have to spend real money on this. curses. might take a bit longer to get than I had hoped because of this, having to shop around now. I'm still pushing thanksgiving, but it might take a little bit longer. %@$%#@. double !%@#$%@.
Myren, I don't think they are glued. If they are, it gives them no chance to replace burned out bulbs. I have taken apart a 5.6" and a 8.4", both had screws to remove driver/inverter boards. Be careful w/ inverters, they can kill.
The screen covers can be removed to replace the bulbs. The problem with the screen i have is that the connections from the control board mounted on the back of the screen to the lcd panel itself are very short and there doesnt seem to be any way to disconnect them but i am still looking to find a way of extending a short ribbon cable so that i can fold out the controller from the back of the panel.
eac74
eac74
I had the short ribbon problem with the first screen I used. I found a ribbon to extend the connection, but it was impossible to solder. What you need to use is...I think...conductive epoxy? I found the ribbons in the digi-key catalog. I didn't find out about the adhesive until I gave up on the screen.
Here's a range of Opaque projector from $40 to$200
This gives a lot of promise.
http://www.khue.com/dept/misc/tracjr.htm
This gives a lot of promise.
http://www.khue.com/dept/misc/tracjr.htm
Projector
The instruction manual for my LCD projection pannel says you can only use it with transmisive type projectors so these type of projectors you are proposing are no good, I may seem like some what of an pessimist but I do not want people to waste their money. It also sya for best results use at least a 450 watt globe with adequet cooling.
The instruction manual for my LCD projection pannel says you can only use it with transmisive type projectors so these type of projectors you are proposing are no good, I may seem like some what of an pessimist but I do not want people to waste their money. It also sya for best results use at least a 450 watt globe with adequet cooling.
Transmissive it is...
You want it to be transmissive as opposed to reflective.
Light transmits through the panel. The panels themselves do not create light on their own, e.i., the pixels do not create light, they pass it.
Anything that uses a cold cathode light can be used for a projector panel.
You want it to be transmissive as opposed to reflective.
Light transmits through the panel. The panels themselves do not create light on their own, e.i., the pixels do not create light, they pass it.
Anything that uses a cold cathode light can be used for a projector panel.
Opaque projector
hi..
i needs help to built my own Opaque projector. i know nothing about this projector. If u have the diagram hope send to me.
tq 🙂
hi..
i needs help to built my own Opaque projector. i know nothing about this projector. If u have the diagram hope send to me.
tq 🙂
Sorry I thought these projectors yuo are talking about were different, still need a brighter globe!
GBA
Just one last thing I forgot to say is that the new game boy advance screen have fairly hight res and are small, they are also resonably cheap so you may be able to hack into these are use them! Just a thought
Just one last thing I forgot to say is that the new game boy advance screen have fairly hight res and are small, they are also resonably cheap so you may be able to hack into these are use them! Just a thought
Faidzir, opaque projector can be gotten cheaply. From $50 on up for a new unit.
Fiat1, be careful, the type of LCD you're talking about now maybe a graphic LCD. We need video LCDs. The Game Boy may or may not be graphic, I don't know. The LCD needs a video input.
Also, the link you provided to the person who built their own projector look like they used an Opaque projector and modified it.
Vince
Fiat1, be careful, the type of LCD you're talking about now maybe a graphic LCD. We need video LCDs. The Game Boy may or may not be graphic, I don't know. The LCD needs a video input.
Also, the link you provided to the person who built their own projector look like they used an Opaque projector and modified it.
Vince
Please consider Case# 3 for your viewing pleasure.
http://www.education.eth.net/acads/physics/light-X.htm
http://www.education.eth.net/acads/physics/light-X.htm
I wonder what is in the commerical video projectors because it seems that they are 10x more than what it cost to make or am I missing something?
DLP LASER ?
Hi!
maybe we could do something better using a DLP or Laser ?
i agree that crt are too complex but maybe a DLP project or a laser prejection could be done ?
¨Pa
Hi!
maybe we could do something better using a DLP or Laser ?
i agree that crt are too complex but maybe a DLP project or a laser prejection could be done ?
¨Pa
Type-E,
There are some projector lenses that cost more than a projector with a lens. Know what I mean?
If it's made from ground glass, it's going to cost more than a polymer lens. Then there is the barrel for the lens. Is it plastic, aluminum? How many elements are there in the lens? Are the lenses corrected for color?
Is it made by hand?
Buhl Optics makes replacement LCD projector lenses, a division of Navitar.
There are some projector lenses that cost more than a projector with a lens. Know what I mean?
If it's made from ground glass, it's going to cost more than a polymer lens. Then there is the barrel for the lens. Is it plastic, aluminum? How many elements are there in the lens? Are the lenses corrected for color?
Is it made by hand?
Buhl Optics makes replacement LCD projector lenses, a division of Navitar.
ok, I'm back after a while
I thought I could get away, but the draw of the projector pulled me back in.
on this thread of projector prices, I've even seen light bulbs that cost as much as $800, so surely the full unit is going to be expensive.
on a different topic... I'm still excited about the LED light source, and I want to make it work. I did a little more research, and surpisingly found that LEDs are less efficient than fluorescent and HID lights for broad light specturm (i.e. white light) So it seems that LEDs would not be effective in a full color lcd panel, or through filters to three separate panels.
Where they still seem promising to me is as separate red green and blue light sources for three lcd panels. No light filter involved, and no light is lost through the filters (which seems to be very large in all other three panel solutions) All that is needed is to find the right wavelength LEDs to get the correct color balance. and of course work out all the optics to get the picture to merge.. but who's afraid of a little hard work?? 🙂 If we can do this to increase the relative efficience of the led's, then a fanless, instant on, long-life solution might still be possible... of course a big array would still be needed for each color, but not as much as for white led's.
whaddya think?
I thought I could get away, but the draw of the projector pulled me back in.
on this thread of projector prices, I've even seen light bulbs that cost as much as $800, so surely the full unit is going to be expensive.
on a different topic... I'm still excited about the LED light source, and I want to make it work. I did a little more research, and surpisingly found that LEDs are less efficient than fluorescent and HID lights for broad light specturm (i.e. white light) So it seems that LEDs would not be effective in a full color lcd panel, or through filters to three separate panels.
Where they still seem promising to me is as separate red green and blue light sources for three lcd panels. No light filter involved, and no light is lost through the filters (which seems to be very large in all other three panel solutions) All that is needed is to find the right wavelength LEDs to get the correct color balance. and of course work out all the optics to get the picture to merge.. but who's afraid of a little hard work?? 🙂 If we can do this to increase the relative efficience of the led's, then a fanless, instant on, long-life solution might still be possible... of course a big array would still be needed for each color, but not as much as for white led's.
whaddya think?
one more thing
I'm also assuming that monochrome panels are more transmissive than the full color panels. does anyone have any data on that? I'm still looking to find some cheap panels, and I know they're out there...
I'm also assuming that monochrome panels are more transmissive than the full color panels. does anyone have any data on that? I'm still looking to find some cheap panels, and I know they're out there...
LCD PROJECTOR (HOMEMADE)
HERE'S ANOTHER MESSAGE BOARD. CHECK IT OUT..........http://www.greenspun.com/bboard/q-and-a-fetch-msg.tcl?msg_id=006hui
HERE'S ANOTHER MESSAGE BOARD. CHECK IT OUT..........http://www.greenspun.com/bboard/q-and-a-fetch-msg.tcl?msg_id=006hui
faidzir,
here is opaque projector diagram:
..........................lamp source
..........................beamed to object
..........................|
..........................v
..................../...AAAA
.................../.................H.........................|
................../..................H.........................|
................./...................H.........................|
................/....................H.........................|
.............../.....................H.........................|
............../......................H.........................|
............./.......................^lens
...............==========
mirror 45^.........^object to display............^screen
degrees angle
to base
confused? ignore the dotted, and you'll see the diagram.
My thinking is using this setup with LCD panel as an object,
so we can use common LCD display with backlit shutoff or
use LCD panel with high reflective panel (mirror?) behind.
what do you think?
here is opaque projector diagram:
..........................lamp source
..........................beamed to object
..........................|
..........................v
..................../...AAAA
.................../.................H.........................|
................../..................H.........................|
................./...................H.........................|
................/....................H.........................|
.............../.....................H.........................|
............../......................H.........................|
............./.......................^lens
...............==========
mirror 45^.........^object to display............^screen
degrees angle
to base
confused? ignore the dotted, and you'll see the diagram.
My thinking is using this setup with LCD panel as an object,
so we can use common LCD display with backlit shutoff or
use LCD panel with high reflective panel (mirror?) behind.
what do you think?
this is just theory (since they dont make em), but if you got a fast enough monocrome LCD, you could just use one LCD and three difference LCD light sources.
lcd to red channel.
red channel on.
red channel off
lcd to green channel
green channel on
green channel off
lcd to blue channel
blue channel on
blue channel off
you'd need an lcd capable of 3x refresh of whatever you wanted effective refresh to be, but it might work.
as for why projectors cost so god damned ******* much (pardon me, I'm just pissed at their prices), its probably because the projection matrix is probably like an inch by an inch running 1280x1024 with a contrast ratio of 600:1 for a really nice $7000 2500 lumen SXGA projector.
Whereas with something like my solution, you've got a standard 15 inch projector and an overhead projector (OHP). Everything is about 10x bigger and about 100x less prone to error. A glitch in the opticals of something tiny can be a huge problem, but the same glitch in an OHP is completely unnoticable. And you've got about 10x less LED density, and less contrast ratio for the uber-expensive LCD screen.
Matt
lcd to red channel.
red channel on.
red channel off
lcd to green channel
green channel on
green channel off
lcd to blue channel
blue channel on
blue channel off
you'd need an lcd capable of 3x refresh of whatever you wanted effective refresh to be, but it might work.
as for why projectors cost so god damned ******* much (pardon me, I'm just pissed at their prices), its probably because the projection matrix is probably like an inch by an inch running 1280x1024 with a contrast ratio of 600:1 for a really nice $7000 2500 lumen SXGA projector.
Whereas with something like my solution, you've got a standard 15 inch projector and an overhead projector (OHP). Everything is about 10x bigger and about 100x less prone to error. A glitch in the opticals of something tiny can be a huge problem, but the same glitch in an OHP is completely unnoticable. And you've got about 10x less LED density, and less contrast ratio for the uber-expensive LCD screen.
Matt
- Status
- Not open for further replies.