My 19" LCD Projector
Greetings,
First of all I am new to the forum and this is my first post here. 🙂
I am an absolute new bee to DIY Projector world however, am absolutely inspired and devoted to building a projector.
Doing some research I find that there has not been an attempt made to make one out of a 19" LCD or higher size LCD in general. So I am going to make an attempt to make out of my DELL 1905 LCD. Haven't even orderd the parts yet as I am still doing research and am looking for some input on what issues I may run into.
Disappointed with no find on any attempt to 19" LCD was definitely re-inspeired by looking at this post at diyAudio.com
http://www.diyaudio.com/forums/showthread.php?s=&threadid=69975
So for the moment I have just one ingredient of the many, my DELL 19" LCD that measures exactly 12 H x 15 W.
I am looking for a suggestions and issues for suitable options I have available for projector designs, Fresnel lens size, you know the rest.
Greetings,
First of all I am new to the forum and this is my first post here. 🙂
I am an absolute new bee to DIY Projector world however, am absolutely inspired and devoted to building a projector.
Doing some research I find that there has not been an attempt made to make one out of a 19" LCD or higher size LCD in general. So I am going to make an attempt to make out of my DELL 1905 LCD. Haven't even orderd the parts yet as I am still doing research and am looking for some input on what issues I may run into.
Disappointed with no find on any attempt to 19" LCD was definitely re-inspeired by looking at this post at diyAudio.com
http://www.diyaudio.com/forums/showthread.php?s=&threadid=69975
So for the moment I have just one ingredient of the many, my DELL 19" LCD that measures exactly 12 H x 15 W.
I am looking for a suggestions and issues for suitable options I have available for projector designs, Fresnel lens size, you know the rest.
I am not sure that I understand why would anyone want 19" LCD projector.
You are pushing it with the lenses, size will be enourmous
and worst of all projected image will huge.
How close to the sceen will it have to be?
I have 15" and long throw lense and I'll have to reduce size
of the image to make it fit on my screen, and I bought biggest screen
that would fit in the room.
Beside that resolution of 17" and 19" is the same...
Am I missing something ?
You are pushing it with the lenses, size will be enourmous
and worst of all projected image will huge.
How close to the sceen will it have to be?
I have 15" and long throw lense and I'll have to reduce size
of the image to make it fit on my screen, and I bought biggest screen
that would fit in the room.
Beside that resolution of 17" and 19" is the same...
Am I missing something ?
If you are determined to use a 19 inch LCD here are the calculations that I came up with.....
For a 100 inch diagonal image (more than 8 feet)
You would have to use a 22 inch focal length opaque projector lens and have the projector a little more than 11 and 1/2 feet away from your screen. I hope that you have the room for it.
There's a 22 inch opaque projector lens on Ebay right now
Opaque Projector Lens and they have become kind of rare, I'd snag it now if I were you.
Tgreenwood
For a 100 inch diagonal image (more than 8 feet)
You would have to use a 22 inch focal length opaque projector lens and have the projector a little more than 11 and 1/2 feet away from your screen. I hope that you have the room for it.
There's a 22 inch opaque projector lens on Ebay right now
Opaque Projector Lens and they have become kind of rare, I'd snag it now if I were you.
Tgreenwood
hhmm
how do you know it's a 22" focal length lense?
i'm sorta new to this whole projector business.
how do you know it's a 22" focal length lense?
i'm sorta new to this whole projector business.
Thank You Everyone
Greetings,
First of all I would like to thank everyone for getting me started with some questions/feedback/suggestions. I will try to answer any questions and will also ask a few stupid questions along the way as I learn more.
Here are my intentions:
1. Build a projector from a 19" - Why?
1. Well frankly I am exited to build this one and get a good understanding behind how the entire thing works. Want to know the physics/optics behind it as this is my first one. I am all about getting a nice crisp image. So the higher the resolution the sharper the image, and day-by-day the new LCD's are going higher up in the resolution and fairly smaller in size. However, the final goal later is to take a monitor with either 1600x1200 or 1920x1200 and build a projector from it. So if I can find a LCD of a smaller size that supports this resolution, I am a happy camper.
2. Without any know-how I just assumed the following:
2. We have the following sources of construction available:
a. Light source of 400W available - I think this is more then enough for a good nice bright source of light.
b. Wood, Wiring, any other construction material is available.
c. Two challenges are going to be: Focal Length Lens and Fensel Lenses. Also Fensel Lenses can be found of a bigger size so the real challenge will be the Focal Length Lens.
3. Thank You "tgreenwood" for pointing my attention to the EBay auction for the 22" inch Focal Length Lens. I am bidding on it right now 😉
**********
Last but now least, I started to get the basics out of the way so I ripped apart my Dell 1905FP LCD and boy that puppy is hard to rip apart, I had to manually cut it. I will have pictures posted soon.
Haven’t completed it all but I just took out the back plastic black frame. Had planned to take the LCD and build a nice frame but spent all my spare time yesterday just ripping apart the back frame. I took some pictures, will post them soon. But will take the LCD out and take the exact size and build a frame from 3/4" MDF Will definitely take pictures and keep you guys posted.
**********
Greetings,
First of all I would like to thank everyone for getting me started with some questions/feedback/suggestions. I will try to answer any questions and will also ask a few stupid questions along the way as I learn more.
Here are my intentions:
1. Build a projector from a 19" - Why?
1. Well frankly I am exited to build this one and get a good understanding behind how the entire thing works. Want to know the physics/optics behind it as this is my first one. I am all about getting a nice crisp image. So the higher the resolution the sharper the image, and day-by-day the new LCD's are going higher up in the resolution and fairly smaller in size. However, the final goal later is to take a monitor with either 1600x1200 or 1920x1200 and build a projector from it. So if I can find a LCD of a smaller size that supports this resolution, I am a happy camper.
2. Without any know-how I just assumed the following:
2. We have the following sources of construction available:
a. Light source of 400W available - I think this is more then enough for a good nice bright source of light.
b. Wood, Wiring, any other construction material is available.
c. Two challenges are going to be: Focal Length Lens and Fensel Lenses. Also Fensel Lenses can be found of a bigger size so the real challenge will be the Focal Length Lens.
3. Thank You "tgreenwood" for pointing my attention to the EBay auction for the 22" inch Focal Length Lens. I am bidding on it right now 😉
**********
Last but now least, I started to get the basics out of the way so I ripped apart my Dell 1905FP LCD and boy that puppy is hard to rip apart, I had to manually cut it. I will have pictures posted soon.
Haven’t completed it all but I just took out the back plastic black frame. Had planned to take the LCD and build a nice frame but spent all my spare time yesterday just ripping apart the back frame. I took some pictures, will post them soon. But will take the LCD out and take the exact size and build a frame from 3/4" MDF Will definitely take pictures and keep you guys posted.
**********
As far as the 22 inch lens goes, I've never seen any results that show that lens has a big enough field of view to cover a 19 inch lcd. It has been shown to work with a 17 inch lcd however. Maybe it will work with a 19 inch lcd. You'll be the first to find out as far as I know. Bottom line is you're taking a chance on this.
Lense Questions
Hey Mikey p,
Yeah I kinda got that feeling when I decided to do this with a 19" aswell. But The link above I have shows calculation/speculation that it could have worked with a 19". We will find out.
***************************************
Question 1
**********
I was wondering if any of the lenses below are any good to me:
http://search.ebay.com/projector-lens_W0QQfromZR8QQfsooZ1QQfsopZ1QQssPageNameZWLRS
Any suggestions ?
***************************************
Question 2
**********
Am I good-to-go on getting the following Frensel Lenses:
330mm Back Fresnel
550mm Field Fresnel
Any suggestions ?
Thanks in advance.
Hey Mikey p,
Yeah I kinda got that feeling when I decided to do this with a 19" aswell. But The link above I have shows calculation/speculation that it could have worked with a 19". We will find out.
***************************************
Question 1
**********
I was wondering if any of the lenses below are any good to me:
http://search.ebay.com/projector-lens_W0QQfromZR8QQfsooZ1QQfsopZ1QQssPageNameZWLRS
Any suggestions ?
***************************************
Question 2
**********
Am I good-to-go on getting the following Frensel Lenses:
330mm Back Fresnel
550mm Field Fresnel
Any suggestions ?
Thanks in advance.
The only lens that might work in that list is the one you're bidding on. A 650mm fresnel is a better match for the 22 inch Besseler lens. A 330mm back fresnel would be good if you also want to use a precondenser lens. I suggest to go to http://www.lumenlab.com/ and sign up if you're not already a member. ( it's free) They have a focal length calculator and precondenser tool that you'll need to figure things out. They are also the only place I'm aware of that have lenses that can handle 19 inch widescreen. (I'm not sure what your Dell is, 16x9 or 4x3)
Re: Thank You Everyone
Bigger the LCD more difficult it is to get sharp image
on the center and on the corners at the same time.
And that is true even for 15". 19" you will definitely
have problems getting everything in focus.
If you are even lucky that your lense covers all of it.
I guess you can always use just portion of your LCD
that you lense can clearly see in the worst case...
Bigger the LCD more difficult it is to get sharp image
on the center and on the corners at the same time.
And that is true even for 15". 19" you will definitely
have problems getting everything in focus.
If you are even lucky that your lense covers all of it.
I guess you can always use just portion of your LCD
that you lense can clearly see in the worst case...
gssmind said:
Is this right?
Thank you "Mikey p" for pointing my attention to the tools available at
Luman Lab for focal length calculator and precondenser.
I made an attempt to use the Focal Length Calculator but am not sure if I
used the tool properly. So here are the values what I entered and what I
got as the results.
Can anyone make sure if they make sense or are close to correct value so I
can atleast order my Fresnel Lense.
LCD: 19 Inchse
Fresnel FL: 330mm
Triplet FL: 550mm
Fresnel Gap: 1 Inches
LCD Distance: 661.09599 mm ~ 26.027 Inches
Screen Distance: 10.5706 Feet
Screen: 100 Inches
Thank you "Mikey p" for pointing my attention to the tools available at
Luman Lab for focal length calculator and precondenser.
I made an attempt to use the Focal Length Calculator but am not sure if I
used the tool properly. So here are the values what I entered and what I
got as the results.
Can anyone make sure if they make sense or are close to correct value so I
can atleast order my Fresnel Lense.
LCD: 19 Inchse
Fresnel FL: 330mm
Triplet FL: 550mm
Fresnel Gap: 1 Inches
LCD Distance: 661.09599 mm ~ 26.027 Inches
Screen Distance: 10.5706 Feet
Screen: 100 Inches
Lcd 19 inch
Triplet should be entered as 560mm (22inch = 558.9mm)
Fresnel gap 1 inch
Lcd distance to triplet is 669mm
Since the fresnel sits 1 inch (25mm) in front of the lcd: 669 - 25 = 644mm fresnel to triplet-- 650mm fresnel is an excellent match
Screen diagonal 100 inches
Screen distance 11.1 feet
This is assuming you want a split design.
Triplet should be entered as 560mm (22inch = 558.9mm)
Fresnel gap 1 inch
Lcd distance to triplet is 669mm
Since the fresnel sits 1 inch (25mm) in front of the lcd: 669 - 25 = 644mm fresnel to triplet-- 650mm fresnel is an excellent match
Screen diagonal 100 inches
Screen distance 11.1 feet
This is assuming you want a split design.
Greetings,
Thanks again "Mikey p"
**********
First of all I lost that 22" Lens on bidding. Last night I has set my bid to $65.99 and had left thinking that that would be a good price. However, someone had bid just before the auction ended.
**********
Yes. I was considering split design. However, I did not know would would be the best designs to consider in my case?
Anyways I am do understand how you went about finding 650mm to be the best match for the Triplet. However am not sure why you used
Thanks again.
Thanks again "Mikey p"
**********
First of all I lost that 22" Lens on bidding. Last night I has set my bid to $65.99 and had left thinking that that would be a good price. However, someone had bid just before the auction ended.
**********
Yes. I was considering split design. However, I did not know would would be the best designs to consider in my case?
Anyways I am do understand how you went about finding 650mm to be the best match for the Triplet. However am not sure why you used
Where did 22" come from? Is that the lens that I was bidding on?
Thanks again.
Yes, 22 inches was the focal length of the ebay lens, which is what you enter into the focal length calculator. Since you lost the auction, your options are to wait for another one to show up again, or use the LumenLab lens which is said to work with 19 inch widescreen LCDs. I contacted L.L. support to see what they say about the lens working with your 4x3 aspect ratio Dell. You might reconsider stripping your monitir until you find a lens that will work with it. Just my 2 cents. I'll post what L.L. says about thier Pro Lens.
I stripped my LCD and am in process of building the frame for it. Since I broke my Digital Camera, I am taking pics with the regular old fashion one so will post pics when I get them processed.
Yeah since I lost that auction 🙁 , I was pretty tempted to buy the "Pro Projection Lens Triplet" and am not sue if thats is going to work. But till I figure things out clearly, I thought it would be a good idea to wait before I order anything.
Primary goal right now is to build a nice frame out of the lcd and design the box thinking that the Lumen Lab Calculator is right, so I am going to make an attemp to desin the box and pots the pics and then hopefully everyone can post things that would need change etc.
Yeah since I lost that auction 🙁 , I was pretty tempted to buy the "Pro Projection Lens Triplet" and am not sue if thats is going to work. But till I figure things out clearly, I thought it would be a good idea to wait before I order anything.
Primary goal right now is to build a nice frame out of the lcd and design the box thinking that the Lumen Lab Calculator is right, so I am going to make an attemp to desin the box and pots the pics and then hopefully everyone can post things that would need change etc.
Success
Greetings,
I finally have some pics to share.
I stripped out my Dell 1905 LCD and boy it was a pain full process, but I made it, after some hours of work I built a frame for my LCD. There are pics on how I took it apart but I will post them later.
**********
Question 1
I plugged in my monitor and I know for sure I positioned it right so how come the picture on my LCD is inverted. Is it suppose to be that way?
**********
Greetings,
I finally have some pics to share.
I stripped out my Dell 1905 LCD and boy it was a pain full process, but I made it, after some hours of work I built a frame for my LCD. There are pics on how I took it apart but I will post them later.
**********
Question 1
I plugged in my monitor and I know for sure I positioned it right so how come the picture on my LCD is inverted. Is it suppose to be that way?
**********
If it's inverted (upside down) then it's not positioned correctly, if you're looking at the lcd only, without any optics. I got a responce from L.L. about thier Pro lens. It will work with a 19 inch 4x3 aspect ratio. At least now you know for sure there is a lens that will work.
Huh?
I thought that the side of the LCD facing the projection lens was supposed to be upside down and backwards (in other words, the front of the LCD facing the lamp and top and bottom switched) because the projection lens switches the image back the right way again.
Did I just read it wrong?
Tgreenwood
I thought that the side of the LCD facing the projection lens was supposed to be upside down and backwards (in other words, the front of the LCD facing the lamp and top and bottom switched) because the projection lens switches the image back the right way again.
Did I just read it wrong?
Tgreenwood
He's not looking at it with any optics involved. It's just the lcd by itself, is how I understand his comments.
Greetings,
Sorry guys for making it confussing.
Yes that is correct Mikey, I am looking at it just as a LCD prespective.
Basically I ripped appart my LCD and built a frame for it, and placed the LCD by itself in the frame I built and powered it up to test it to check if it still works ok.
When I looked at the picture it was upside down. Not knowing how any part of the Optics work in LCD design, was worried if I made any mistake so I asked if it was suppose to be that way.
Sorry guys for making it confussing.
Yes that is correct Mikey, I am looking at it just as a LCD prespective.
Basically I ripped appart my LCD and built a frame for it, and placed the LCD by itself in the frame I built and powered it up to test it to check if it still works ok.
When I looked at the picture it was upside down. Not knowing how any part of the Optics work in LCD design, was worried if I made any mistake so I asked if it was suppose to be that way.
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