8"-10" LCD panels - Page 1
Forum section: electronics / projects

author: MattHollands
author_rank: Frequent Contributor
timestamp: July 29, 2017, 01:56:05 pm
content: Hi, I want to replace my oscilloscope CRT display with an LCD panel. I've worked out how to get it to output a standard VGA signal, now all I need is a replacement monitor.It currently has about 8" diagonal display area so I wouldn't want to go smaller than that, and there is probably space for up to a 10" display.I've seen a few CCTV monitors and car monitors of the right size, but they are all about £50. I was wondering if anyone knew a good source for LCD panels with a VGA input?

author: amyk
author_rank: Super Contributor
timestamp: July 29, 2017, 04:25:05 pm
content: VGA is analog and no panels will take VGA input directly, as far as I know.However, you could get a panel and a driver board for it.

author: tooki
author_rank: Super Contributor
timestamp: July 30, 2017, 12:11:27 pm
content: Quote from: MattHollands on July 29, 2017, 01:56:05 pmI don't think you're gonna find one much cheaper than that - I don't think that size has the economies of scale that TVs and computer monitors have.Quote from: amyk on July 29, 2017, 04:25:05 pmTrue, but it seems that LCD modules of that size very often ship with a VGA interface. (I suppose they must exist with LVDS and perhaps internal DisplayPort.)

author: Lightages
author_rank: Unknown
timestamp: July 30, 2017, 02:59:21 pm
content: This is what you need:http://www.ebay.com/itm/6Pcs-Set-VGA-LCD-Controller-Drive-Board-LVDS-Driver-Up-to1920x1080-Screen-Panel-/272573155693?epid=852377612&hash=item3f76a0496d:g:7EQAAOSw4CFYrrqI

author: amyk
author_rank: Super Contributor
timestamp: July 30, 2017, 03:04:29 pm
content: Quote from: tooki on July 30, 2017, 12:11:27 pmTablets. 9.7" is rather common. The resolution will be much higher than standard VGA (640x480) but one of those and a VGA-eDP adapter should work, assuming you don't mind running the display at a non-native resolution (the pixels will be small enough that scaling grain might not be noticeable):http://hackaday.com/2013/04/22/connect-a-retina-display-to-a-regular-computer/

author: tooki
author_rank: Super Contributor
timestamp: July 30, 2017, 03:34:09 pm
content: Quote from: amyk on July 30, 2017, 03:04:29 pmWell with the converter, that solution would costfarmore than the £50 the OP is already balking at.

author: MattHollands
author_rank: Frequent Contributor
timestamp: July 30, 2017, 03:38:52 pm
content: Yeah it seems like most displays have the option of shipping with an VGA adaptor.At the minute I think this is my best optionhttp://www.buydisplay.com/default/tft-display/10-1-inchI figured there might be some cheap non-name brands of car-reversing-cameras or things like that which might be good. But I guess I thought it was more common than it is.

author: brainwash
author_rank: Frequent Contributor
timestamp: July 31, 2017, 12:02:56 am
content: The reversing cameras are usually limited to <5" and use a PAL/NTSC to LCD converter board. Also they are limited in refresh rate and have no intrinsic persistence. So, for the 50+ quid, you might get a worse result than a 50$ oscilloscope, but you haven't specified with what model you are starting with. If it indeed has VGA I would just get a scrap monitor and prop it on top of the unit to get a nice, large display.

author: tooki
author_rank: Super Contributor
timestamp: July 31, 2017, 10:39:58 am
content: Quote from: MattHollands on July 30, 2017, 03:38:52 pmBuyDisplay has a really nice selection of modules. Just beware of the rather high shipping costs.

author: ebastler
author_rank: Super Contributor
timestamp: July 31, 2017, 10:46:04 pm
content: Quote from: MattHollands on July 29, 2017, 01:56:05 pmWon't you need a display with 4:3 aspect ratio? That limits the choice quite significantly. I have used this one in a couple of projects now:https://www.pollin.de/p/display-set-ls-8-20-3-cm-8-hdmi-dvi-vga-cvbs-121059(sorry, German-only website)https://www.pollin.de/productdownloads/D121059D.PDF(Data sheet in English)8" XGA (1024 * 768). Not cheap at 70 Euros, but it comes with HDMI/DVI/VGA input, and does a decent job austo-scaling other resolutions. Must be available via other channels as well, I assume; the data sheet contains the manufacturerer's original model number.

author: MattHollands
author_rank: Frequent Contributor
timestamp: July 31, 2017, 11:04:53 pm
content: Quote from: tooki on July 31, 2017, 10:39:58 amI've had a look and it looks like it'll be $12.50 for postage which isn't overly unreasonable.Quote from: ebastler on July 31, 2017, 10:46:04 pmThis monitor supports a 4:3 aspect ratio - yes some of the pixels will be black but that's not really a big issue.

author: tooki
author_rank: Super Contributor
timestamp: August 01, 2017, 03:58:42 am
content: Quote from: MattHollands on July 31, 2017, 11:04:53 pmOh, it looks like they finally added an affordable shipping option!(When I was on their page a few months ago, their shipping was outrageous, something like $20 for a small character LCD.)

author: MattHollands
author_rank: Frequent Contributor
timestamp: August 01, 2017, 03:49:13 pm
content: Well I went ahead and ordered the 10.1" panel. It will arrive some time in the next 40 days! Luckily I'm not in a massive rush to finish this project