Help with connecting Sharp LQ5AW136 to VGA - Page 1
Forum section: electronics / projects

author: Isad
author_rank: Frequent Contributor
timestamp: December 13, 2015, 09:31:49 am
content: HelloSo as the title says i wana try and connect this lcd to vgathe datasheet can be found instantly by searching the name.I am sry if this might be easy but i dont really know enough and wouldnt like to burn it.Thanks

author: amyk
author_rank: Super Contributor
timestamp: December 13, 2015, 01:52:39 pm
content: Analogue LCD with only 234 pixel height - unsuitable for VGA (which needs at least 640x480)

author: rf+tech
author_rank: Frequent Contributor
timestamp: December 13, 2015, 01:58:45 pm
content: Hello Isad,While I was composing my reply, amyk has responded with the short answer.The first step to solving your problem should be to find the manufacturer's datasheet for this LCD panel.The datasheet will provide the connector pinouts, signal timing, signal levels, voltages - everything you need to know.Once you have studied the datasheet, you'll better understand why.RF+ Tech

author: Isad
author_rank: Frequent Contributor
timestamp: December 13, 2015, 08:10:49 pm
content: Thanks for the help yeah now i know why it wont work.Well now i wana ask another question is there any way i canbuy a driver board and drive the lcd seperatly with lets say a arduinojust to display some pixles.I cant finde any data on the lcd code.

author: miguelvp
author_rank: Super Contributor
timestamp: December 13, 2015, 08:37:02 pm
content: It does support NTSC timings so there is hope.Not sure why it has to separate RGB inputs, but I only scanned the datasheet briefly.Also not sure why it has a composite input for timing, or does it support compostite NTSC? because if that's the case a simple VGA to composite will get video, then again it might not. I think there is another thread in the eevblog about that display, you could search and see what they came out with.You can use this site for checking VGA timings:http://tinyvga.com/vga-timingEdit: here is the link to the other thread:https://www.eevblog.com/forum/projects/help-deciphering-sharp-lcd-module-datasheet/Also looking more in the datasheet, the composite input seems to be just to extract the timing information (ie. HSync and VSync)Also note that even if you can feed it NTSC the output will just be good enough for video since it doesn't have the resolution, I wouldn't use that for text (unless is big text)

author: Isad
author_rank: Frequent Contributor
timestamp: December 13, 2015, 08:51:41 pm
content: Quote from: miguelvp on December 13, 2015, 08:37:02 pmWell i think it has compsite ntsc but i am wondering why it has RGBand then horizontal and vertical sync.Like a VGA screen.

author: miguelvp
author_rank: Super Contributor
timestamp: December 13, 2015, 09:24:29 pm
content: Checking the timings more in detail I have bad news and good news.Bad news is that the HSync range is between 15.13KHz and 16.33KHz in NTSC modeThe good news is that it's 15.73KHz typical, meaning that it could be an ideal display for those 15KHz systems.Here is an effort to take that signal into VGA (the opposite of what you need)https://www.eevblog.com/forum/beginners/converting-15khz-analog-rgb-to-digital/msg459236/#msg459236But that display might be able to display directly from those older systems.Also if it's a linux system or something that allows you to specify the resolution and timings you might be able to do that as well.If it does indeed support NTSC Composite (not just to get the derived HSync and VSync as I understand the datasheet) you could get a VGA to Composite adapter.Wire the composite signal for the timings but also wire the RGB for the video signal output, Cumbersome but it should work.