Chapter 8 Touchscreen
8.1 Introduction
The
8.2 Touchscreen Specifications
Electrical
•Contact bounce: < 10 ms
•Operating voltage: 5 V (typical)
• Sheet Resistance: 350 +/- 22% per Square.
• Linearity: <1.5% full scale linearity error in either direction.
• Insulation Resistance: >20 M @ 25VDC
Durability
•Test conditions: 4 H hardness, 0.04" stylus pen, 350 gram load
•Point activation:
1 Million activations on a single point with a 5/8" diameter silicone finger with a 350g load at 2 Hz
•Character Activation Life:
>100,000 characters written within a 20 mm x 20 mm area on the touch screen.
•Chemical resistance:
Hard coating is highly resistant to most solvents and chemicals
Optical
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