Color Bleeding Of Chinese Rgb Panels

[Dann]

Hi Dann, but between 1K or 2.2K there should be a difference ? in bright / speed or something else ? or is exactly the same ? If you have to choose now a value, would you choose 1K or 2.2K ? Thanks!

Ive only used 1K on all mine but i would think there would be no difference between 1K and 2.2k..

 

Before and after pics..

 

 

[Dann]

Before and after pics..

 

[marioc]

I have contacted one of the panel suppliers in China LinsLed and sent them a photo graph of the colour bleed. The one below

They responded actually knowing what the problem was.

This is their response.

 

This is  the RCG  problem. You can set it again by the software,and change the parameters.

Attached please find some documents of RCG Parameter Settings

 

They sent me some configuration files for their controller card.  *.RCG files specific to their card

Also on their web site http://www.sbright.net.cn/english/techinfo.asp?id=67 they have this comment about configurations.

Row Blanking time: value set between 10-200000. It is used to fix brightness leak. Set 3000 for double-color display; 200 for full color display. (Real pixel and virtual pixel). If high value is set for Row Blanking time, and with no effects, please check the connection of receiving card and led display, especially whether OE is reversed connected (settings for Led manufactory)

 

 

 

 

So they know about it and call it Brightness leak.

Maybe Lucky knows about these parameters or understands better than me but perhaps it is software fixable.

Hope this makes some sense to someone.

 

 

 

[lucky1]

I have contacted one of the panel suppliers in China LinsLed and sent them a photo graph of the colour bleed. The one below

IMG_2400.JPG

They responded actually knowing what the problem was.

This is their response.

 

This is  the RCG  problem. You can set it again by the software,and change the parameters.

Attached please find some documents of RCG Parameter Settings

 

They sent me some configuration files for their controller card.  *.RCG files specific to their card

Also on their web site http://www.sbright.net.cn/english/techinfo.asp?id=67 they have this comment about configurations.

Row Blanking time: value set between 10-200000. It is used to fix brightness leak. Set 3000 for double-color display; 200 for full color display. (Real pixel and virtual pixel). If high value is set for Row Blanking time, and with no effects, please check the connection of receiving card and led display, especially whether OE is reversed connected (settings for Led manufactory)

 

 

 

 

So they know about it and call it Brightness leak.

Maybe Lucky knows about these parameters or understands better than me but perhaps it is software fixable.

Hope this makes some sense to someone.

This info is not usable without knowledge how the controller is clocking the panels and how the settings affect

the signaling/timing. Btw they clock the panels with 600hz which is not possible with our controller.

[psmmacker]

Hay people could we add these resisters between the stm32 controller and the rgb panels

Thanks

Paul

[psmmacker]

Or a extra clock chip for timing

[psmmacker]

This is a filter issue as i did a experiment if you the positive and neg off the panels and keep the hub75 plug in you got a slight red signal from the stm 32 discovery

[psmmacker]

The p3 p 2.5 to mod with transister is ok but the p5 you can remove the frame to get to the chips by removing 25 screws from the frount

[psmmacker]

You probley need 15 transistors on the hub cable and may be same caps

[psmmacker]

Would ceramic 2.2k transisters work on the hub 75 cable?

[psmmacker]

Sorry im a noob but. i did a modifi commodore 64 tape deck to dump real tapes to a pc tap file on commodore 64 lol and load them on the original c64 real time would these resisters work as well http://m.ebay.co.uk/itm/50-x-2-2K-Ohm-0-25w-Carbon-Resistors-1-4w-Resistor-2K2-/230517200151?hash=item35abe55517%3Ag%3AuRUAAOxyXHpSQzU7&_trkparms=pageci%253A97def89f-6639-11e6-9c1f-74dbd1800198%257Cparentrq%253Aa4084db81560a2af57787d13ffff8bb7%257Ciid%253A1

[psmmacker]

Ya lucky1 the clock runs at 168 mhz

[psmmacker]

Hi been testing i get power from the stm32 discovery on the 3rd panel with out power,i even put white leds on the output of 2nd panel and their power going from the stm32 discovery board ? On the hub 75 it self i think sheild is wired wrong somewhere

[psmmacker]

Ps yes im powering my panels from usb port and it works 100%

[gech]

Do you know you can edit your posts... 10 posts is maybe too much 

[BlackZero]

Hello,

 

how can I display these ppm images on the DMD?

 

 

Thanks

[Rappelbox]

Open a command line window and and type Pin2dmd.exe /i yourfile.ppm

[psmmacker]

Ps na you need 13 resister as 3 pins on hub75 are gnd

[psmmacker]

And try this example only use two not four positives

[psmmacker]

Here a better pic on earthing the chips p4 marked up

[psmmacker]

Remove some screws from frout of panels and that fixed the colour bleed seem they are shorting them out there are 10 screw across and 5 down p5 fixes topper

[CarnyPriest]

Well, that sounds like a lot easier fix than doing a bunch of soldering.

Sent from my iPhone using Tapatalk

[psmmacker]

Ya thats on p5 only but i want to test my p3 and 2.5 now

[psmmacker]

Before this what my p5 was doing

[psmmacker]

I think adding a earth panel screw on p 2 p3 ect as so far p5 has them screw at the frount