Bongofish

Screen Tablet malarky => Monitors => Topic started by: klaus on January 11, 2007, 11:44:40 PM



Title: Looking for a good 21" Monitor?
Post by: klaus on January 11, 2007, 11:44:40 PM
Hi,

so I have a 12x18 wacom tablet.. Does anyone know of a 21 inch monitor with external power supply?
It's quite hard to get that info from the sellers. Most data on monitors doesn't include if it's internal or external.

Klaus


Title: Re: Looking for a good 21" Monitor?
Post by: Drewid on January 14, 2007, 07:59:10 PM
I split this post off.  It wasn't really in a good thread for it.

Any ideas anyone?


Title: Re: Looking for a good 21" Monitor?
Post by: robcat2075 on January 15, 2007, 01:20:26 AM
I found ebay helpful for researching internal/external of various models

-they may mention a "brick" or 12v power supply which indicates external

-they may show a close up of the model number plate which usually tells the input voltage of the monitor.  110v means internal, 12 v means external

-they may show a back view of the monitor which will show the video and power connection.  a small round connector means an external supply connects; a regular 110v three prong means internal.  Or if the power cable is permanently attached that also suggests internal.


Title: Re: Looking for a good 21" Monitor?
Post by: Clint on January 15, 2007, 02:16:51 AM
They usually call it

external brick
ac adapter
power supply


Title: Re: Looking for a good 21" Monitor?
Post by: wei803 on January 15, 2007, 03:57:40 AM
Havn't seen any screen larger than 19" using an external power supply. Mostly because the larger size of the screen & housing already have enough room to house the power supply. Less external attachement -> less housing -> less cost.


Title: Re: Looking for a good 21" Monitor?
Post by: Chems on February 28, 2007, 01:26:33 PM
Someone on here bought a 21inch monitor, and the power brick was dead easy to remove once opened. Theres pics some place....


Title: Re: Looking for a good 21" Monitor?
Post by: DonShole on February 28, 2007, 01:29:34 PM
That would be Tanassi's build: http://forum.bongofish.co.uk/index.php?topic=157.30


Title: Re: Looking for a good 21" Monitor?
Post by: Chems on February 28, 2007, 02:41:15 PM
Thats the one!


Title: Re: Looking for a good 21" Monitor?
Post by: Messyhair on March 18, 2007, 10:28:45 PM
soooo... does that make a 12 x 14 tablets screen size 19"?  for me, numbers are a gateway to the imagination. that is, when someone starts in on math I think about absolutely anything else.

thanks.

mess


Title: Re: Looking for a good 21" Monitor?
Post by: Switz on March 19, 2007, 01:37:42 AM
I doubt it, I would just say get a 12x18 or a 12x19 and use the 19", but if you are going to go with a 12x18 or bigger, might as well get a 21 inch+


Title: Re: Looking for a good 21" Monitor?
Post by: Messyhair on March 29, 2007, 04:39:15 AM
I just won a 12x18 ud-1218(r?). soooo, I should get a 20.1 16:10 right? again, I can be kinda stupid when it comes to doing the math.

stupid mess


Title: Re: Looking for a good 21" Monitor?
Post by: NoRights on April 17, 2007, 06:00:38 PM
I've found a couple 20" that use externals. (One of the Dell UltraSharps has one, I think. And I believe BenQ make one, too.) Still looking to see if there are any good 21" candidates. I'm also trying to see which monitors might have a psu module like Tanassi's. Kinda hard to find pics from inside


Title: Re: Looking for a good 21" Monitor?
Post by: bnewbie on November 25, 2008, 06:51:27 PM
Hi All,

Just reviving this thread somewhat, hopefully someone will have some info to help me out!

This is something I'm looking for right now. I just purchased/won an A3 Wacom (12x18) and while I do have a couple of nice Samsung 21" 4:3 monitors they are hung on the wall and I don't particularly want to remove them and they also have internal power supplies.

Is there any more up-to-date information on 21" monitors which have external PSUs which don't cost an arm and a leg?

Cheers,

L.


Title: Re: Looking for a good 21" Monitor?
Post by: Drewid on November 25, 2008, 11:58:24 PM
Now I'm sure there's a 21" somewhere in the build logs but I can't remember where.   Came out with no jitter too, but didn't make it into the "sucessful builds " board yet for some reason. Perhaps it didn't get finished.

I can only suggest searching for a while.


Title: Re: Looking for a good 21" Monitor?
Post by: bnewbie on November 26, 2008, 10:57:55 AM
Hi,

Thanks for the reply Drew. I was looking at some Dell 2001FP monitors on eBay which have a nice 1600x1200 resolution (yummy) and external power supplies. However I felt somewhat bad about losing 2" on the width of the tablet. Also some digging around and I found that my soon to arrive Wacom Intuos A3 Gd-1218-R has an active area of just over 18"x12" according to Wacom's own documentation (http://www.wacom.com/productsupport/manual/intuosusermanual.pdf). This means some slightly bigger monitors come into the picture, albeit ones with internal PSUs.

I'm also looking at whether it would be relatively easy to build a Faraday cage for the PSU circuitary - foil, chickenwire/thin metal mesh. I notied one thread on here where you (Drew) mentioned that there is no real evidence that internal PSUs cause jitter. I would really like to get a half decent screen (non TN panel) for this so using a decent screen (higher end NEC or ViewSonic would be something I would like). Anyhow has this experience of no proof on this matter changed?

UPDATE: I just measured (again) my Samsung 213T (21.3" 1600x1200 4:3) and while it is perfect on the width, (just under the tablet) the height is about 5mm too much. Now in truth I can spare 2.5mm each side - I don't suspect I could to get that close to the edge anyway with the pen. The question is whether I can find a 21" 4:3 which will spare me this trouble altogether. Of course I'll hold off the actual purchase until I get the tablet in my hand and measure it myself.

Cheers,

L.


Title: Re: Looking for a good 21" Monitor?
Post by: Drewid on November 26, 2008, 02:18:04 PM
We've had builds with internal supplies and no jitter problems. so it's not a definite thing, it's just luck as to the frequencies used I guess.

Definite causes of jitter so far proved.

Interference from the column/row driver boards directly attached to the LCD panel.

Metal between the pen and the sensor. (often causes drop-outs too).

Interference picked up by FFC cables.  This cable was cut down from 20 to 16 tracks by trimming the ends. The unused cables managed to pick up interference from somewhere and magically induced it into the wacom, it went away when they were removed.

Failing external power supply.  jitter went away when the supply went pop and was replaced.

Some monitors will work jitter free with intuos 2 but not intuos 1,  Wacom changed the pen frequence for the intuos two, so that's caused confusion in the past.

 


Title: Re: Looking for a good 21" Monitor?
Post by: bnewbie on November 26, 2008, 02:31:28 PM
Hi Drew,

Thanks very much for taking the time to go through it. I did notice that most of the projects here was with newer tablets, however I didn't have too much choice on eBay. Okay maybe I did but I wasn't all that keen to spend £250+ on a tablet (mainly because I'm not a professional artist/illustrator, but I digress).

I'm trying to find a 21.3" 4:3 on eBay or elsewhere now. I'll start a build log once I get the bits in order. I'm also looking to replace the backlight with LED backlight strips (reduce heat and power usage considerably) but lets see if I can walk first :)

Edit: Regarding the interference on the FFC cables - did you try to wrap them in foil? (apologies if this sounds patronising). The reason I ask is that sometimes I've seen FFC cables wrapped in some type of fairly thick foil and I presume this can only help reduce this.

I must confess this DIY Cintiq thing is quite addictive :)

Cheers,

L.


Title: Re: Looking for a good 21" Monitor?
Post by: Drewid on November 28, 2008, 02:23:00 PM
The thing is I was aided by dumb luck in my build.  There's a very minor amount of jitter in a few places out near the screen edge, but only a pixel or so even there.
Purely down to the monitor / tablet combo and nothing at all to do with me knowing what I'm doing.

Wrapping cables has been used before, and is definitely only a couple down from the top in terms of things to try.

Oh and don't worry about sounding patronising,  What's obvious to you might not be to someone else, or might have been overlooked.  It's the old "is it plugged in, is it turned on?" thing.  It's always worth just checking.


Title: Re: Looking for a good 21" Monitor?
Post by: brimblashman on September 13, 2010, 10:48:36 PM
Hello forum, first post :)

I just got today an lg w2286l in the post which has an external power brick, is led backlit as well and apparently is 16:10. (is for an intuos 3 a3wide :D)

I'm pretty sure that LG E2250V 21.5 inch, LG E2240S-PN 22 inch and the hp X22LED have external power supplies, not quite the right size but might be useful...



Title: Re: Looking for a good 21" Monitor?
Post by: Drucifer74 on January 22, 2011, 07:28:05 AM
Laptop monitors seem easier to mod than desktop but in my experience you are looking for a high input socket on the rear for the VGA DVI. if they are lower on the rear of the monitor, then odds are they are not lvds. Just my thoughts.

Drew


Title: Re: Looking for a good 21" Monitor?
Post by: Rik! on August 06, 2011, 10:26:53 PM
Hello, I already  said it in another topic but I'm building my DIY cintiq with an LG IPS226 wich is a 21.5' IPS monitor with LED backlight and external PSU.
Mounted with a intuos 3 A3 it's just amazing ! ( IPS ROCKS !) and it's pretty cheap : 159€ FTM


Title: Re: Looking for a good 21" Monitor?
Post by: Sullemunk on May 28, 2015, 08:32:52 PM
I am woundering if this samsung monitor (http://www.samsung.com/levant/consumer/it/monitor/led-monitor/LS22D300HY/ZN) would be a good candidate for a wacom ptz-1231 (A3) diy cintiq?
It's a 21,5" screen with external power supply, and rather cheap.


Title: Re: Looking for a good 21" Monitor?
Post by: Aerendraca on May 29, 2015, 07:07:44 AM
Unfortunately there's no way to know without trying it, as yet there are no hard and fast guidelines for selecting a screen that is guaranteed to work sorry of using a panel someone else has had success with. With that said there are a few things you can look research to improve your chances.

1. Given the price similarities these days I recommend LED backlighting over CCFL. There's less chance of injuring yourself with high voltage and the panels trend to be thinner.

2. Laptop screens are typically much thinner than monitor panels. The closer the pen is to the digitizer the stronger the signal, having the pen closer also reduces the visible effects of parallax.
It's worth investigating how thick the Samsung panel is, bare in mind that a normal maximum working height of the poems above the digitizer is between 12mm to 14mm, so I would recommend a maximum of 8mm thick + 2mm cover glass to protect it. At this sort of distance though you are likely to experience the parallax effects I mentioned previously.

3. Check to see the circuit configuration on the back of the panel, really you want to have a single PCB attached to one side only so that you can fold this out from underneath without needing to extend anything. Most screens have this configuration these days but some don't.

4. If you go for a monitor the power supply board is bare, be careful not to shock yourself with live mains voltage! In this case though this appears not to be a problem as you have said that the monitor you are interested in has an external supply. As a matter of point if you use a laptop screen you will need to get an LVDS controller circuit (about £20), you'll also need a power supply 'brick' (<£10).



I recommend looking at some of the successful build and seeing what they've used.

As a point of clarity when I refer to the panel I mean the actual glass and backlight assembly not the monitor as a whole. This is important to note as you will need to research which panel the Samsung monitor has within it.

Good places to look for information are beyond infinite and panelook.com.


Title: Re: Looking for a good 21" Monitor?
Post by: identity on April 13, 2016, 09:46:47 PM
AOC I2260s internal power supply
AOC I2260SWD internal power supply
AOC I2279VWHE external power supply

All three tested and working and compatible with intuos3 xl 12x19


Title: Re: Looking for a good 21" Monitor?
Post by: DaBotz on May 15, 2016, 06:52:15 PM
AOC I2260s internal power supply
AOC I2260SWD internal power supply
AOC I2279VWHE external power supply

All three tested and working and compatible with intuos3 xl 12x19

Thanks for the information, identity.