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.
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