 I DIY a PJ with 896 LEDs |
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 Dec 15 2005, 04:34 PM
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#1
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Still Here  Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299  |
896 leds,20ma,3.3v,12000-15000mcd,32*28 leds,with 12-15v dc power source,a cpu fans.
lcd:8.4 inches,toshiba,800*600 tft. cost list(chinese RMB,1us$=8.1 RMB) lcd with control panel:780 1000 pcs leds:350 PCB board:20 12-15v DC power:100 lense:320mm,dia.:67mm 160 fenier? lense(I can't say it in English):330mm,60 I am a Chinese,I hate me,when a learn English,I uasully sleep.I don't think someday I must say it.I am very sorry for my poor English. no more words I can say,see pictures please. |
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Dec 15 2005, 04:36 PM
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#2
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
the led board
This post has been edited by Tian: Dec 15 2005, 04:44 PM
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Dec 15 2005, 04:47 PM
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#3
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
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Dec 15 2005, 04:51 PM
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#4
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
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Dec 15 2005, 04:55 PM
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#5
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
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Dec 15 2005, 04:59 PM
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#6
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
60 inches blue result picture
you can see more pictures at: http://diy2005.aa.topzj.com/viewthread.php?tid=44145&fpage=1
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Dec 15 2005, 05:04 PM
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#7
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
60 inches result picture
you can see all 42 pictures at : http://diy2005.aa.topzj.com/viewthread.php?tid=53643&fpage=1 This post has been edited by Tian: Dec 15 2005, 05:05 PM
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Dec 15 2005, 05:08 PM
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#8
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 Cad Guru Group: Global Moderator Posts: 2594 Joined: 15-March 04 From: Texas, USA Member No.: 698 |
QUOTE (Tian @ Dec 15 2005, 10:59 AM)  60 inches blue result picture you can see more pictures at: http://diy2005.aa.topzj.com/viewthread.php?tid=44145&fpage=1 Is the wave effect in this shot (Post #6) from the led's or from the camera used? Joe -------------------- www.joescnc.com
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Dec 15 2005, 05:21 PM
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#9
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 Janitor  Group: Global Moderator Posts: 4937 Joined: 20-January 05 From: Alberta, Canada Member No.: 4880 |
Looks like there's 2 issues there. A bit of unevenness in lighting from the LEDs and also some from what appears to be the screen.
Without seeing the screen in "normal" lighting, it's hard to tell exactly how much of what is from what. -------------------- -- In theory, there's no difference between theory and practice. In practice, there is.
-- There are 2 kinds of people in the world. Those who can extrapolate from incomplete data   My all-pro projector PLOG -- 17" LCD, Pro triplet, LL eBallast, Ushio PS lamp & pro reflector. My 10.6" PLOG -- 10.6" LCD, standard triplet, LL eBallast, double-ended lamp & pro reflector Got questions? Please read the FAQ first! |
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Dec 15 2005, 05:21 PM
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#10
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
QUOTE (joe2000chevy @ Dec 15 2005, 05:08 PM) Is the wave effect in this shot (Post #6) from the led's or from the camera used? Joe the bad pictuers is my first led board with 192leds,the better one is 896leds board i use now. |
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Dec 15 2005, 05:29 PM
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#11
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Help Desk Group: Customer Posts: 242 Joined: 21-October 04 Member No.: 3134 |
Scrolled through most of the pics he has posted in the link he gave and the wave effect definitely doesn't appear to be a factor. Maybe it is just noticeable when the screen is a solid color? Maybe it is only being picked up by the camera? It actually looks pretty good and at just 60" it is reasonably viewable under ambient light (at least "bar room" quality anyway). There does seem to be a color issue, in the reds in particular. Blues look great. Blacks are decent. Green is good. Yellow may be a bit muted, but reds are definitely lacking- they're almost brown really. Maybe this can be adjusted/compensated with the lcd controls?
Anyway, nice job Tian. Definitely shows a good result with led lighting. I might even try it myself if I could find 900 leds for a reasonable price (say, $100)...not likely in the states...I've seen 6x6 arrays (36 total leds) selling for about $20. That would make your array cost $500 here...ouch... |
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Dec 15 2005, 05:38 PM
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#12
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
QUOTE (SupraGuy @ Dec 15 2005, 05:21 PM) Looks like there's 2 issues there. A bit of unevenness in lighting from the LEDs and also some from what appears to be the screen. Without seeing the screen in "normal" lighting, it's hard to tell exactly how much of what is from what. this picture is under 25w old lights and 2*7w new lights(I can't say them in English) This post has been edited by Tian: Dec 15 2005, 05:40 PM
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Dec 15 2005, 05:44 PM
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#13
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Janitor Group: Global Moderator Posts: 4937 Joined: 20-January 05 From: Alberta, Canada Member No.: 4880 |
Yeah, in that picture you can see some wrinkles in the screen, which can be seen in the blue projection.
The LEDs seem to produce slightly uneven light. Still looks better than I thought that it would. -------------------- -- In theory, there's no difference between theory and practice. In practice, there is.
-- There are 2 kinds of people in the world. Those who can extrapolate from incomplete data My all-pro projector PLOG -- 17" LCD, Pro triplet, LL eBallast, Ushio PS lamp & pro reflector. My 10.6" PLOG -- 10.6" LCD, standard triplet, LL eBallast, double-ended lamp & pro reflector Got questions? Please read the FAQ first! |
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Dec 15 2005, 05:54 PM
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#14
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
hi everyone,it is 0:51 at china,sorry I goto bed, sleep now.
I will do my best to answer your question tomorrow. |
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Dec 15 2005, 11:39 PM
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#15
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 Help Desk Group: Customer Posts: 235 Joined: 13-October 04 Member No.: 2997 |
Can anyone source some LEDs for a project like this? The cheapest I can find them is about a buck a piece or 100/$40 on eBay.
Building the PCB to hold the LEDs would be a simple matter with our CNC machines. |
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Dec 16 2005, 12:28 AM
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#16
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 Help Desk Group: Customer Posts: 205 Joined: 18-November 04 From: Logan, Utah Member No.: 3588 |
放映机看起来好从图片, 但您会采取有些, 或许一些从DVD 吗?
-------------------- There is much to do, but it can wait!
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Dec 16 2005, 12:41 AM
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#17
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Cad Guru Group: Global Moderator Posts: 2594 Joined: 15-March 04 From: Texas, USA Member No.: 698 |
QUOTE (pulsareus @ Dec 15 2005, 05:39 PM) Can anyone source some LEDs for a project like this? The cheapest I can find them is about a buck a piece or 100/$40 on eBay. Building the PCB to hold the LEDs would be a simple matter with our CNC machines. He posted this link before. 1,000 for 60 dollars http://www.besthongkong.com/product_info.p...5c6ed6ad0c706d6 Joe -------------------- www.joescnc.com
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Dec 16 2005, 02:53 AM
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#18
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 Grayson Sigler Group: Admin Posts: 8742 Joined: 8-December 03 From: Asheville, NC Member No.: 2 |
QUOTE (joe2000chevy @ Dec 15 2005, 07:41 PM) He posted this link before. 1,000 for 60 dollars http://www.besthongkong.com/product_info.p...5c6ed6ad0c706d6 Joe Those LEDs are 10,000k color. Most would consider that very blue. -------------------- |
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Dec 16 2005, 04:06 AM
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#19
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
QUOTE (pulsareus @ Dec 15 2005, 11:39 PM) Can anyone source some LEDs for a project like this? The cheapest I can find them is about a buck a piece or 100/$40 on eBay. Building the PCB to hold the LEDs would be a simple matter with our CNC machines. we found a factory to make the prebuild led boards,we sale it in china now,and we want to sale this led board in ebay for everyone in the earth,after we test it more than one month,at about january 2006. the price is 139us$,include: 1.prebuild led board with 896leds 2.12-16v,5A DC power. 3.other 50 same leds for free 4.other 25resisters for free 5.a small slience fans for this led boards the leds we use is:3.3v,20ma,25-30 degree,12000-15000mcd,7000K,5mm. 139us$ not include mail cost,you pay it by youself. if we sale it in ebay,we will give the link. thks,everyone. This post has been edited by Tian: Dec 16 2005, 04:09 AM |
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Dec 16 2005, 04:48 AM
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#20
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 I Should Be Working Group: Customer Posts: 145 Joined: 15-November 05 Member No.: 9646 |
Can we see some pictures using your LED projector to show how crisp the projected image is?
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Dec 16 2005, 06:48 AM
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#21
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I Should Be Working Group: Customer Posts: 83 Joined: 25-February 04 From: hongkong Member No.: 542 |
yah...can we see some results..
-------------------- Zantetsuken
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Dec 16 2005, 09:02 AM
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#22
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
QUOTE (zedrik @ Dec 16 2005, 06:48 AM) yah...can we see some results.. this result picture is 100 inches(16:9),use this led board at 55watts,by my companion "carpow". he and i make this 896leds board togather,we know each other in internet,his city and my city more than 1000 miles distance.  ,now I don't know carpow is a male or a female,we contact all in internet.
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Dec 16 2005, 09:10 AM
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#23
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Still Here Group: Customer Posts: 35 Joined: 14-December 05 From: southwest China Member No.: 10299 |
QUOTE (zedrik @ Dec 16 2005, 06:48 AM) yah...can we see some results.. zedrik,are you from hongkong?if you can read chinese,please visit: http://www.jd-bbs.com/viewthread.php?tid=8...page%3D1&page=1 you can see how i and carpow make this 896leds board from a 192leds board step by step. by the help of more than 100 persons from whole china in internet,we just can did it successful. |
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Dec 16 2005, 10:23 AM
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#24
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Enlightened Group: Customer Posts: 700 Joined: 27-February 05 Member No.: 5554 |
That is pretty amazing
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Dec 16 2005, 12:39 PM
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#25
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 A Lot of Pips! Group: Global Moderator Posts: 2655 Joined: 14-February 05 From: Charlton, NY Member No.: 5331 |
Is the 896LED board being used with the same 8.4" LCD ? If no, how large is the LED array ?
Any plans to make one for a 15" or 17" LCD ? Is there a possbility of sourcing LED's in the 6000-6500°K range ? From the photo you posted, it certainly looks like corner brightness is very much improved. Nice work... keep it up. Thanks for the info, gs -------------------- Beer... not just for breakfast anymore.
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Lo-Fi Version | Time is now: 9th February 2010 - 12:57 AM |