Hello all. Thanks for all your help in advance. I've got a new inspection challenge.
We are seeing an artifact of manufacture in a touchscreen bonded to an LCD.
The touchscreen consists of a polymer layer attached to a piece of glass.
That assembly gets bonded to an LCD.
What we're seeing is that when the LCD heats up, the polymer layer of the touchsreen expands at a different rate than the glass it's bonded to, and in doing so swells up slightly in a mode we're referring to as "pillowing". It's not visible with text or image, but the customer is not happy.
Discussions are underway to quantify exactly how much of this phenomena is acceptable.
My challenge is how to measure the amount of deformation. It is visible only when the unit is at operating temperature. Contact measurement is going to be touchy at best, and I'm not familiar with any other techniques that would be appropriate.
I do have some budget available to address this issue, so I'm open to all suggestions.
Thank you all, Covers (would that more properly be Elsmarians?)
Norman
We are seeing an artifact of manufacture in a touchscreen bonded to an LCD.
The touchscreen consists of a polymer layer attached to a piece of glass.
That assembly gets bonded to an LCD.
What we're seeing is that when the LCD heats up, the polymer layer of the touchsreen expands at a different rate than the glass it's bonded to, and in doing so swells up slightly in a mode we're referring to as "pillowing". It's not visible with text or image, but the customer is not happy.
Discussions are underway to quantify exactly how much of this phenomena is acceptable.
My challenge is how to measure the amount of deformation. It is visible only when the unit is at operating temperature. Contact measurement is going to be touchy at best, and I'm not familiar with any other techniques that would be appropriate.
I do have some budget available to address this issue, so I'm open to all suggestions.
Thank you all, Covers (would that more properly be Elsmarians?)
Norman
