Ipad 3/4 Display with HDMI converter board

[pokodono]

flynnsbit post
Yup, and make sure and turn up overdrive all the way. It will remove any latency and get it very close to a CRT.


what do you mean by "turn up overdrive all the way"?

to make work the minimig, nes, sns and megacd cores i had to add this to the MiSTer.ini :
[minimig]
vsync_adjust=0
[nes]
vsync_adjust=0
[snes]
vsync_adjust=0
[megacd]
vsync_adjust=0

[flynnsbit]

@steveskr, It's just regular PLA+ in the colors I had available as I did end up finishing it with filler, sanding, and painting silver. If I were to sell something like that I would want to correct many of the flaws. It's also a 24 hour print and takes about half a spool of material so I am not sure I could keep the cost down to something that wouldn't be an insult to people. It's just a hobby for me.

@pokodono, there is a setting on the LCD itself in the menu called "Overdrive", make sure it is turned on, then there is a sub setting for how much 1-100, and you want that all the way up to 100. That will decrease the latency of the display down to less than 1 frame.

[jca]

I bit the bullet and ordered one. I have 2 questions:
What are the recommended video settings in MISTer?
What is the audio sample rate?

Edit: Bonus question
I intend to build a self contained system but would like the possibility of also using an external monitor/TV. I have been thinking of using an HDMI manual switch. Does anyone as any recommendation on a good quality one?

[pokodono]

@steveskr, It's just regular PLA+ in the colors I had available as I did end up finishing it with filler, sanding, and painting silver. If I were to sell something like that I would want to correct many of the flaws. It's also a 24 hour print and takes about half a spool of material so I am not sure I could keep the cost down to something that wouldn't be an insult to people. It's just a hobby for me.

@pokodono, there is a setting on the LCD itself in the menu called "Overdrive", make sure it is turned on, then there is a sub setting for how much 1-100, and you want that all the way up to 100. That will decrease the latency of the display down to less than 1 frame.

thanks steveskr! I cannot navigate the screen menu, the touch panel is required to use the menu?

[jca]

I received the screen this week and tested it yesterday, beautiful screen!
I have everything lying on my desk and it is a mess but it was just for testing.
In also ordered an audio amp: https://www.amazon.com/gp/product/B087PG2LVY/
I connected it to the audio out of the HDMI board and horror! Hum.
I guessed it was due to EMI coming from the screen/controller. I tried, with not much hope, to connect it to the audio out of MISter: hum.
I powered down everything and reconnected my regular HDMI monitor with the audio amp still connected to MISTer. Besides the loud clacks when starting a core there is absolutely no hum.
It looks like this thing will need a lot of shielding/use of chokes in order to put everything in one box.
Did any of you have the same experience and what was your solution?

[flynnsbit]

Same power adapter that is powering both the display and the amp? Does it do anything different with two power supplies? Could try something like this: https://www.amazon.com/gp/product/B000K50HJE/ But now the parts are getting a bit ridiculous.

[jca]

Yes, same PS for display and amp which is also something I have been thinking about and why I mentioned using chokes. I will dig in my junk box to see if I have a spare one but first I want to make some kind of frame to install the screen and the controller. As it is it is too much of a mess and I am afraid to let the smoke come out. I still believe it comes from the screen/controller as every LCD monitor I have opened has always a shield covering the electronics. I have some laptop PS which deliver 18-19V and would be usable for the amp and deliver more Watts but at 12V it is more than enough for such a small screen

[dawshan]

Hi All,

I'm trying to get my ipad screen to work. Mister @1080p is working but 1536p not. PC @1536p is working btw. I've tried 4-5 hdmi cable but no luck. Any suggestion?

[dawshan]

I've tried those but not worked

Code: Select all

video_mode=13
video_mode=2048,48,32,80,1536,2,4,38,209250
video_mode=2048,48,32,80,1536,2,6,33,208921

[jca]

video_mode=13 works for me.
With video_mode=8 the screen is squashed horizontally.

[dawshan]

I've tried another custom video mode based on my EDID and no luck again...

Code: Select all

Modeline............... "2048x1536" 206.000 2048 2096 2128 2208 1536 1538 1544 1577 +hsync -vsync

Code: Select all

video_mode=2048,48,32,80,1536,2,6,33,206000

It's funny "video_mode=1" also doesn't work even it's supported by the board.

Code: Select all

Monitor
  Model name............... QHD-Display
  Manufacturer............. Apple
  Plug and Play ID......... APP0133
  Serial number............ 800
  Manufacture date......... 2016, ISO week 46
  Filter driver............ None
  -------------------------
  EDID revision............ 1.3
  Input signal type........ Digital
  Color bit depth.......... Undefined
  Display type............. RGB color
  Screen size.............. 290 x 170 mm (13.2 in)
  Power management......... Standby, Suspend, Active off/sleep
  Extension blocs.......... 1 (CEA/CTA-EXT)
  -------------------------
  DDC/CI................... Not supported

Color characteristics
  Default color space...... sRGB
  Display gamma............ 2.20
  Red chromaticity......... Rx 0.661 - Ry 0.332
  Green chromaticity....... Gx 0.302 - Gy 0.613
  Blue chromaticity........ Bx 0.149 - By 0.060
  White point (default).... Wx 0.313 - Wy 0.329
  Additional descriptors... None

Timing characteristics
  Range limits............. Not available
  GTF standard............. Not supported
  Additional descriptors... None
  Preferred timing......... Yes
  Native/preferred timing.. 2048x1536p at 59Hz (16:9)
    Modeline............... "2048x1536" 206.000 2048 2096 2128 2208 1536 1538 1544 1577 +hsync -vsync
  Detailed timing #1....... 1360x768p at 60Hz (16:9)
    Modeline............... "1360x768" 85.500 1360 1424 1536 1792 768 771 777 795 +hsync -vsync

Standard timings supported
     720 x  400p at  70Hz - IBM VGA
     640 x  480p at  60Hz - IBM VGA
     800 x  600p at  56Hz - VESA
     800 x  600p at  60Hz - VESA
    1024 x  768p at  60Hz - VESA
    1680 x 1050p at  60Hz - VESA STD
    1600 x 1200p at  60Hz - VESA STD
    1600 x  900p at  60Hz - VESA STD
    1440 x  900p at  60Hz - VESA STD
    1152 x  864p at  60Hz - VESA STD
    1280 x  800p at  60Hz - VESA STD
    1280 x  720p at  60Hz - VESA STD
    1280 x  960p at  60Hz - VESA STD

EIA/CEA/CTA-861 Information
  Revision number.......... 3
  IT underscan............. Supported
  Basic audio.............. Supported
  YCbCr 4:4:4.............. Supported
  YCbCr 4:2:2.............. Supported
  Native formats........... 1
  Detailed timing #1....... 1920x1080p at 60Hz (16:9)
    Modeline............... "1920x1080" 148.500 1920 2008 2052 2200 1080 1082 1087 1125 +hsync +vsync
  Detailed timing #2....... 1920x1080i at 60Hz (16:9)
    Modeline............... "1920x1080" 74.250 1920 2008 2052 2200 1080 1084 1094 1124 interlace +hsync +vsync
  Detailed timing #3....... 1280x720p at 60Hz (16:9)
    Modeline............... "1280x720" 74.250 1280 1390 1430 1650 720 725 730 750 +hsync +vsync
  Detailed timing #4....... 720x480p at 60Hz (16:9)
    Modeline............... "720x480" 27.000 720 736 798 858 480 489 495 525 -hsync -vsync

CE video identifiers (VICs) - timing/formats supported
    1920 x 1080p at  60Hz - HDTV (16:9, 1:1)
    1920 x 1080i at  60Hz - HDTV (16:9, 1:1)
    1280 x  720p at  60Hz - HDTV (16:9, 1:1)
     720 x  480p at  60Hz - EDTV (16:9, 32:27)
     720 x  480p at  60Hz - EDTV (4:3, 8:9)
     720 x  480i at  60Hz - Doublescan (16:9, 32:27)
     720 x  576i at  50Hz - Doublescan (16:9, 64:45)
     640 x  480p at  60Hz - Default (4:3, 1:1)
    1920 x 1080i at  50Hz - HDTV (16:9, 1:1)
    1920 x 1080p at  50Hz - HDTV (16:9, 1:1)
     720 x  576p at  50Hz - EDTV (16:9, 64:45)
    1280 x  720p at  50Hz - HDTV (16:9, 1:1)
    1920 x 1080p at  24Hz - HDTV (16:9, 1:1)
    1920 x 1080p at  25Hz - HDTV (16:9, 1:1)
    1920 x 1080p at  30Hz - HDTV (16:9, 1:1)
    NB: NTSC refresh rate = (Hz*1000)/1001

CE audio data (formats supported)
  LPCM    2-channel, 16/20/24 bit depths at 32/44/48 kHz

CE speaker allocation data
  Channel configuration.... 2.0
  Front left/right......... Yes
  Front LFE................ No
  Front center............. No
  Rear left/right.......... No
  Rear center.............. No
  Front left/right center.. No
  Rear left/right center... No
  Rear LFE................. No

CE vendor specific data (VSDB)
  IEEE registration number. 0x000C03
  CEC physical address..... 1.0.0.0
  Supports AI (ACP, ISRC).. No
  Supports 48bpp........... No
  Supports 36bpp........... Yes
  Supports 30bpp........... Yes
  Supports YCbCr 4:4:4..... Yes
  Supports dual-link DVI... No
  Maximum TMDS clock....... 305MHz

CE colorimetry data
  xvYCC601 support......... Yes
  xvYCC709 support......... Yes
  sYCC601 support.......... No
  AdobeYCC601 support...... No
  AdobeRGB support......... No
  BT2020CYCC support....... No
  BT2020YCC support........ No
  BT2020RGB support........ No
  Metadata profile flags... 0x01

Report information
  Date generated........... 10/9/2020
  Software revision........ 2.91.0.1043
  Data source.............. Real-time 0x0071
  Operating system......... 10.0.18363.2

Raw data
  00,FF,FF,FF,FF,FF,FF,00,06,10,33,01,20,03,00,00,2E,1A,01,03,80,1D,11,78,EE,44,55,A9,55,4D,9D,26,
  0F,50,54,A3,08,00,B3,00,A9,40,A9,C0,95,00,71,40,81,00,81,C0,81,40,78,50,00,A0,80,00,29,60,30,20,
  26,00,55,50,21,00,00,1A,00,00,00,10,00,00,1E,30,46,8F,33,00,C4,FE,10,00,00,1A,66,21,50,B0,51,00,
  1B,30,40,70,36,00,C4,FE,10,00,00,1A,00,00,00,FC,00,51,48,44,2D,44,69,73,70,6C,61,79,0A,20,01,51,
  02,03,28,F1,4F,10,05,04,03,02,07,16,01,14,1F,12,13,20,21,22,23,09,07,07,83,01,00,00,67,03,0C,00,
  10,00,38,3D,E3,05,03,01,02,3A,80,18,71,38,2D,40,58,2C,25,00,55,50,21,00,00,1E,01,1D,80,18,71,1C,
  16,20,58,2C,25,00,55,50,21,00,00,9E,01,1D,00,72,51,D0,1E,20,6E,28,55,00,55,50,21,00,00,1E,8C,0A,
  D0,8A,20,E0,2D,10,10,3E,96,00,55,50,21,00,00,18,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,4D

[dawshan]

I believe my problem is lying within MiSTer not the driver board or display:

• When i've changed to mister_alt_1.ini display shows static image.

• If i try to rollback to mister.ini nothing changes.

• If i restart the mister via IO boards button ps3 joypad lose connectivity and won't connect anymore.

It looks like mister freezes when i try to change resolution to 2K and needs to power cycle to come back. Unfortunately this problem and troubleshooting is far beyond my knowledge. So, i give up and thinking to use ipad lcd in another project.

[Sigismond0]

Sneak peek at a 3d model I'm currently working on. I'd say it's about 90% done, currently just stuck with a few tweaks and reprints until I'm happy. As of right now, everything but the front bezel piece fits pretty well. Will be available with a 100mm VESA style mount with captive M3 nuts, or with a desktop stand. Uses M2 self-tapping screws for assembly (12x 4mm, 25x 8mm most likely).

IkBaMYx.png (111.54 KiB) Viewed 46527 times

YqFsjRv.png (161.95 KiB) Viewed 46527 times

[flynnsbit]

Looks awesome!

[Sigismond0]

Anybody have problems with flickering when running at 2048x1536 (13)? Even just sitting on the menu, my panel will occasionally go blank and then come right back on sporadically. On average I'd say every 10 seconds or so. If I set to other resolutions it's rock solid--so far I've tried 12, 6, and 4 and they all work. Oddly, it won't sync at all with 1024x768 (1), which is odd since that's the most obvious resolution that should work fine aside from the native.

I can live with 1920x1440 and interpolation on, but I'm not in love with it. Would love it if anyone has any advice.

Things I've tried:

• DVI mode off and on
  Various resolutions
  Various vsync adjust

[flynnsbit]

Did you turn overdrive all the way up? How is your cooling on your mister? DVI mode on for sure.

[Sigismond0]

Changing to a different video mode from this thread seems to have done the trick, at least with vsync adjust=0. 1 or 2 cause flickering in most cores, even with overdrive on and cranked to 100.

Edit: Looks like I spoke too early. Still lots of flickering/desync with the other 2048x1536 modelines. Dropping down to 1920x1440 definitely works just fine, but 2048x1536 just doesn't seem to work. Will pick up a new HDMI cable, in the off chance that all the ones I have laying around just can't handle the higher bandwidth.

[muthuxmut]

Just a quick sanity check - is this combo the "right" one for low latency retina goodnees ?
https://www.aliexpress.com/item/32955678219.html

Thanks:)

[Poeskas]

Just a quick sanity check - is this combo the "right" one for low latency retina goodnees ?
https://www.aliexpress.com/item/32955678219.html

Thanks:)

Wondering the same!

[muthuxmut]

Just a quick sanity check - is this combo the "right" one for low latency retina goodnees ?
https://www.aliexpress.com/item/32955678219.html

Thanks:)

Wondering the same!

I'll be ordering in the next day or so.
Will report back, hopefully with good news

[belgarcat]

Yes, you have to search for the LP097QX1 reference.
Maybe if you buy the controller board and the screen separately you can get a better price.

[hernan43]

I have a board that looks basically identical to that one. It works great but it _needs_ a heatsink of some kind. That main chip gets very hot.

Other sellers of that board include a heatsink. For whatever reason mine did not. I happened to have a spare parts heatsink so I lucked out.

[Vespa]

Does anybody have a board that lets you use widescreen aspect ratios? The LCD board I have has the option but its greyed out (like a lot of other options), it would be nice to use this screen with other devices.

[Teddy]

Sneak peek at a 3d model I'm currently working on. I'd say it's about 90% done, currently just stuck with a few tweaks and reprints until I'm happy. As of right now, everything but the front bezel piece fits pretty well. Will be available with a 100mm VESA style mount with captive M3 nuts, or with a desktop stand. Uses M2 self-tapping screws for assembly (12x 4mm, 25x 8mm most likely).

This looks awesome. Do you have an ETA on when you think you'll be done?

Great job

[Sigismond0]

This looks awesome. Do you have an ETA on when you think you'll be done?

Great job

Like two days after that post!

https://www.thingiverse.com/thing:4721767

[allegrosurf]

This looks awesome. Do you have an ETA on when you think you'll be done?

Great job

Like two days after that post!

https://www.thingiverse.com/thing:4721767

Hi @Sigimond0,
I just wonder, this is the correct control board to fit on your 3d printed case?
https://www.aliexpress.com/item/1005001779837870.html

[muthuxmut]

Just a quick sanity check - is this combo the "right" one for low latency retina goodnees ?
https://www.aliexpress.com/item/32955678219.html

Thanks:)

Wondering the same!

well i have this now and on 5V via micro usb supply its working OK. Some weird flickering at times ?? and the sound drops in and out.
I havent given it a full shake down yet, but right now i think its going to work out.
I'll get a 12V psu and sort out the .ini settings in MiSTer and hopefully its a winner

[Sigismond0]

Hi @Sigimond0,
I just wonder, this is the correct control board to fit on your 3d printed case?
https://www.aliexpress.com/item/1005001779837870.html

No, that one looks like it has an extra small board, and thicker connectors.

[allegrosurf]

Hi @Sigimond0,
I just wonder, this is the correct control board to fit on your 3d printed case?
https://www.aliexpress.com/item/1005001779837870.html

No, that one looks like it has an extra small board, and thicker connectors.

Hi @Sigimond0,
Sorry to bother you again, I just want to make sure, i dont want to buy a wrong one. Because i already printed the case, which one is the correct one

This one?
https://www.aliexpress.com/item/4000041589440.html
Or this one?
https://www.aliexpress.com/item/4000817738201.html

[Sigismond0]

Hi @Sigimond0,
Sorry to bother you again, I just want to make sure, i dont want to buy a wrong one. Because i already printed the case, which one is the correct one

This one?
https://www.aliexpress.com/item/4000041589440.html
Or this one?
https://www.aliexpress.com/item/4000817738201.html

This one: https://www.aliexpress.com/item/4000817738201.html

Looks identical to the one I bought: https://www.amazon.com/gp/product/B07R4VR9PR