Hi all
Anybody has any experience in EMC requirements for LCD modules.
I am currently working on a project that uses an LCD module with a builtin Hymax HX8238 controller. I am trying to figure out how much EMI/ESD mitigation I need down the line. It's got a grounded metal frame so I am assuming that is enough as a basic ESD protection for the module itself. The only thing I am worried about is down the ribbon cables.
Any help would be great.
fernan
A ferrite "bead" shaped to fit the cable will help o limit the higher- frequency stuff coming out of the display down the cables. I have also seen ribbon cables looped two or more times through a ferrite donut.
The radiated emissions out the front of the display will be harder to control. Transparent but conductive layer like indium tin-oxide coated sheet may help, or use a fine metal mesh if the Moire patterns are not too objectionable.
I had two recent cases and fixed it with meshes from this company:
Not cheap but gives the unit almost a mil-spec appeal. I had to rotate to 45 degrees to avoid too much moiree. After it's all spec'd out they'll offer custom cuts. Hint: Don't ever pull on this stuff, it'll stretch and then bulge very easily.
-- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.