Res Touch Vs PCAP
We are a current user of the NHD-3.5-320240MF-ATXL-T-1 TFT display, to date we have close to 10,000 in the field with excellent results. Our products are cooking controllers for commercial appliances and we are looking to resolve a problem which is not related to the performance of the display. Some of our controllers are used in smaller equipment and we have found that the resistive touch screens can degrade and crystallize when exposed to temperature above the maximum 70C rating, always from the sheet metal our product is mounted on. To fix that problem we have our customers creating air gaps between the sheet metal / front overlay and the controller to make sure we can get some convective air flow to keep the display cooler. That causes another issue, that dust and insulation particles can get trapped between the resistive touchscreen and the overlay causing touch sensing errors.
I see that the PCAP version of this display has the same 70C rating as the resistive touch, is that due to the LCD display or will the PCAP deposited films in the touchscreen also degrade at between 70C and 80C? If anyone has experience in this area or I can get some feedback from Newhaven engineering that would be great!
Larry Affelt
I see that the PCAP version of this display has the same 70C rating as the resistive touch, is that due to the LCD display or will the PCAP deposited films in the touchscreen also degrade at between 70C and 80C? If anyone has experience in this area or I can get some feedback from Newhaven engineering that would be great!
Larry Affelt
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Hi Larry,
Glad to hear our displays are working great for you. The 70C rating is due to the LCD display itself rather than the PCAP. Capacitive can work at 80C but may lose some performance. The issue however would still be the LCDs rating of 70C.
Thanks,
ZP0
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