The next time you are using a touch screen ATM, simply touch the screen without applying any pressure. You will find that the machine will not accept any input.
Apply pressure on the screen and it will start working. This is resistive touch technology in action.
A resistive touch screen is made of two transparent layers of glass or plastic, each coated with a conducting layer of Indium Tin Oxide (ITO). The conducting sides face one another and are separated by an air gap.
When pressure is applied by the user, the top layer bends and touches the bottom layer. This causes a small amount of current to flow at the point where they connect. The location of the touch event can then be measured by the sensors.
Unlike most other types of touch screens (capacitive, infrared touch screen technology ) these screens have moving parts. Depending on how they are fabricated, these screens can be classified as:
Pros of Resistive Touch Technology
The Baanto ShadowSense Advantage
Resistive touch screens have a number of issues which are addressed by ShadowSense touch screens.
|Cons of Resistive Touch Screens||ShadowSense Benefits|
|Does not support true multi touch||Supports true multi touch including gestures|
|Is not very sensitive and excessive force is needed for touch activation||The screen is extremely sensitive and can recognize even the soft bristles of a paint brush|
|Distortion in electric field between layers can cause errors in touch detection||No electrical distortions resulting in error free touch detection|
|Has an air layer between the two glass layers which affects display quality and clarity||Screens have 91% optical clarity and 93%/95% transmissivity, making them extremely readable even in low light|
|Not scalable as it is impossible to maintain uniform thickness between two screens beyond a certain size, and the ITO deposition technology hits a performance ceiling beyond 22”||Can range from 8’’ to 267’’ in size without compromising on cost effectiveness and performance|
|Outer layer scratches easily, and the ITO layer cracks with use, resulting in dead zones||Scratch and dust resistant as it is covered by 3mm thick tempered glass, and lasts for more than 200,000 hours without any degradation in performance, even if LEDs fail|