Resistive Touchscreens
Resistive touchscreens are one of the two common technologies used to provide a direct interface with the equipment being controlled; the other uses a capacitive, or more recently, a projected capacitive technology.
Resistive touchscreens are a multilayer fabrication. A conductive indium tin oxide (ITO) coating is applied to the internal face of a polyester cover sheet and the opposing face of a glass backing sheet so the coatings face each other. Small transparent spacers are positioned between the glass and the cover sheet, separating them until, when pushed by a finger, gloved hand or stylus, the cover sheet deforms, forcing the two coatings into contact. The interface unit then identifies the specific location of the touched area. The typical resolution of a touchscreen is 4096 x 4096 points.
Resistive touchscreens deliver cost-effective, consistent and durable performance in environments where equipment must stand up to contaminants and liquids, such as in restaurants, factories, and hospitals. IGT can design and supply resistive touchscreens in a range of industry-standard sizes up to 24" diagonal; custom sizes to suit specific applications can also be supplied. Touchscreens can be supplied as stand-alone units or embedded into higher-level assemblies as part of an integrated system. UK design, manufacture and quality control, combined with low-cost Far East manufacture, provide a very cost effective solution for HMI units. Pricing is very competitive at all volumes from initial prototypes, through short pre-production runs to small batch fabrication and high volume manufacturing.
Size
2" - 24"
Sealing
IP67
Resolution
4096 x 4096 points, 0.1mm
Operating life
>10 million touches
Operating temperature
10°C - 60°C
Operating pressure
15g - 70g
Linearity x and y axes
1.5% - 3.5%
Operating voltage
5VDC nominal (3V - 12V range)
Operating current
5mA - 20mA
Interface
RS232 or USB
Transparency
>80%
Anti-glare coating
Standard
Anti-Newton ring coating
Standard
Options
Custom sizes
Clear coating
Strengthened glass for heavy duty applications
Thick glass for shock resistance
Linear polarizer for sunlight readability
Anti-smudge coating allowing easy cleaning and avoiding fingerprints on the screen
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