Ace_3000....pictures of Projector?

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#341
Re: I Eat Flowers

ace3000_1 said:
Thanks for the post, this guys screen shots are dull, must have a bad cam also either that or its not that bright, but with that being said in real life the story is much different, do u have any idea of the size of projected image this guy was using to take the screen shot?

Trev
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the screen is 180x180 cm, distance 400cm, lens is 285mm efl.
he told me, that where the first shots with uncorrected optics.
it' looks better now(he told me).
 
#342
wow how an earth did he end up with an image that big with a lens with that kind of a throw on a 7inch? lol his optics must have been way out, i get a 2m diagonal image with a 3m throw i found out last night, thats a wide screen 2m diagonal, as for the optics yeah the frensels are the most important part, even though my frensel is 15cm focal i only get the whole area lit up at 20cm so u tell me how to work that one out lol

Trev
 
#343
ace3000_1 said:
wow how an earth did he end up with an image that big with a lens with that kind of a throw on a 7inch? lol his optics must have been way out, i get a 2m diagonal image with a 3m throw i found out last night, thats a wide screen 2m diagonal, as for the optics yeah the frensels are the most important part, even though my frensel is 15cm focal i only get the whole area lit up at 20cm so u tell me how to work that one out lol

Trev
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yes, it works. see and try http://www.wschmid.de/Downloads/Berechnungstool.xls
put in your data in that exel-file. u are using the 240mm fujinon from the surplus store. his has 285mm. pj must be wider than urs.
 
#344
u are using the 240mm fujinon from the surplus store. his has 285mm. pj must be wider than urs.
Click to expand...

If my focal is shorter that would mean my image would be bigger then his at the same throw distance, the only difference i see here is the power of his lens. Either that or a bigger lcd, putting a frensel over the front of a lcd can make the image bigger also.

Trev
 
#348
Just thought id post a pic of the projector in its pile , i took this pic last night for some reminders of what i am suposed to be building as time is dragging on lol, atleast it shows im doing somthing, the light engine u see here is a trade secret, there is a certain way on how its setup and how to get it to work right, also on what it does, in the pic it isnt in its correct position so im not fussed to post it, those who will buy the plans will see what it does and how to set it up right naturally, but im not going to say what secrets lay behind this design as im saving this for later on in another design, although its quite obvious in what its doing, im sure the smarter guys will be able to work this out lol.

Trev
 

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#350
That design is so cool now that i see it as whole unit.
If I had found your design when i first started this project i would have bought your plans first thing and not frigged around with the intense research need to do this right.

Any newbies out there, save your self a headache and buy Ace's plans when they are available. At this point in the game i wished i did! Too far in debt now to turn back on my design.

I got to give it to you, it's a good design.
 
#352
im making a bigger 15 inch design and i wanted to know if it was worth it for me to buy your plans for the possibility there might be ssomething in it i could encorporate into my design, such as the light box and how you say there is no light leak and you get 4 times the brightness, or should i not even try it because i do plan on using a 400w bulb?
 
#354
Guys thanks for the nice complements, tonight ive started work on the pyramid, this is a proto but i thought id take a quick pic to show u guys what your up for lol, this is just half but u get the idea, ill post up a finnished pic of it latter today after ive cut the lens and painted the pyramid.

Trev
 

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#355
Ace, your project is truly inpirational. I only hope the results justify the amount of effort work and love you have put into this creation. And if the results are indeed of a high caliber, it would certainly help you sell more plans, as if people know the results are worth it, they will definantly be more willing to spend the money. Keep up the great work man!

Now, earlier in this thread there was mentioned about an LCD from Overstock.com, this one here...

http://www.overstock.com/cgi-bin/d2.cgi?PAGE=PROFRAME&PROD_ID=622702#

Now, on the description is lists as 11,520,000 dots. This has me confused... for it so have that many Dots the resolution would have to be extremely high... even 1024x768 only has 786,432 dots... but that is also only a 4:3 screen...

Common 'letterbox' (i.e. 16:9) resolutions are 853 x 480 or 1365 x 768 or even 1820 x 1024. Now, these are on the assumption that the pixels are square. The size ratio for letterbox screens is 1.77 pixels horizontally, for every 1 vertical pixel. Now there are 'letterbox' lcds and screens that are 16:9 but have a resolution of 1024x1024, this is because the actual size of the pixel is 1.77:1

So, assuming the above LCD has square pixels, I cannot find a reolution that achieves the 11,520,000 dot claim. even 1820x1024 is only 1,863,680 pixels total, hell, multiply the vertical by three and you still only have 5.5 million dots total, multiply the horizontal by three and you jump up to 16.7 million pixels, way past our 11.5 claim...

So, I am confused, what is the actual resolution of this monitor, does it truly have 11.5 million dots?

Any help is appriciated, as I am slowly gathering stuff to build my projector and finding an LCD seems to be one of the most crucial things and so I want to get it right, the first time... 🙂
 
#356
Heya buddy thanks for the nice complements, ill get it finnished one of these days, i should have the pyramid posted up later today.

One thing to keep in mind is that dot's are different from pixels, there are 3 dots per pixel, the pixels work horizontally and vertical but dots only work in a horizontal fashion on the stripe configeration, so say the reso for the lilliput is native 800x480 the dots would be 3x the 800 = 2400 and then u have the same amount on the vertical so the reso in dots would be 2400 x 480, now the amount of dots the screen has totally is 2400 x 480 = 1152000, the advert in that site is wrong, they are trying to trick u into buying the item, with that being said if they did add another 0 on ther end of the number the reso would be 800x480, there is no lcd in this world in the 7inch range that has this amount of dots and thats why it doesnt add up, if that item has vga id consider buying it but beware if it has a panasonic lcd in it , u wont beable to use it for projection as the lcd has ribbon cables that will need to be lengthend, the best lcd to use for this projector is the hitachi , it has no cables in the way and its in the lilliput and its a sole reson why i went the lilliput route although there is another brand thats cheaper and also uses the hitachi lcd inside, maybe cooldrums can elaberate on this as i cant remember the name of the brand, u also want to get one with a vga input, svideo and comp video realy are not upto spec, the colouring isnt true and its abit blury, the vga is true colour and is sharp as a razor and not only that vga can be compressed to run in higher resolutions on the lilliput monitor and others that suport this feature.

Trev
 
#357
Thanks Trev, I appriciate the info, makes a lot more sence now. I was unaware that there were three dots per pixel vertically, so it makes more sence how they achieved their answer, though I guess they added an extra 0 to make you think its better then it really is. Its sad when companies do that, depressing even 🙁

Ill be starting my projector within a couple weeks, just gotta get the LCD and fresnels, and Ill be able to build my project. Ill make a work log, so others can follow 😉
 
#358
Amra

nice one buddy i like to see how others go with their project, as for the pixels if u want to find out how many pixels are on the active screen area just go native reso, in this case 800x480 = 384000 pixels, that will give u how manny pixels are on the screen, as for the 3 dots per pixel they are the red, blue and green dots that make up one pixel and thats why there is 3 dots per pixel, many get confused on this and now hopfully its easier for others to work out lol but some lcd's not the small ones have 5, 6 , and 7 dots per pixel, if u go by the stripe config wich is normally the case with all lcds that are 12 inches and below it will be right.

Trev
 
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