Touchscreens are everywhere. Whether a smartphone in your pocket, a laptop or tablet, or a D-series touch display, touchscreen technology has infiltrated our everyday lives in big ways. But how many can actually answer the question, “How do touchscreens work?” Probably only a handful.
In order for a touchscreen to work efficiently, there are specific characteristics that must be considered. These characteristics typically include:
- Precision in Position Sensing
- Rapid Response to Input
- Installation Cost
Because touchscreens are used in a wide variety of technologies and devices, there are also different touchscreen technologies. We will discuss the two most popular types of panels used for touchscreens.
Resistive Film Touch Panels
In 2010, resistive film technology was the most widely used technology on the market. It is most commonly found on small to mid-sized electronics, including smartphones, PDAs, GPS, and handheld gaming devices.
With resistive film touch panels, the position on the screen that is in contact with a finger, stylus, or other object is detected by a change in pressure. This occurs because of the basic internal structure that consists of a glass screen and film screen that are separated by a narrow gap. Both the glass and the film are covered with a transparent electrode film. When pressure is applied to the surface the two screens come in contact with each other, forcing the electrodes to touch, creating an electrical current. The touchscreen is then able to detect where the point of contact is being made by the change in voltage.
This type of technology is popular due to the advantages that it offers manufacturers. Some of the advantages include its low manufacturing cost, simple structure, and lower electricity requirement. Another huge benefit is that the configurations are strongly dust and water resistant, as the surface of the device is covered in a protective film. Because this technology is dependent upon pressure to register a touch, it is responsive to a naked finger, gloved finger, and stylus.
There are also a few drawbacks to this technology, including lower light transmittance as a result of the film and two electrode layers, relatively lower durability and shock resistance, and reduced precision of detection with larger screens.
Capacitive Touch Panels
Following resistive film touch panels, capacitive touch panels are the second most commonly used form of touchscreen technology. Similar to resistive film touch panels, the capacitive touch panels are used in standalone LCD monitors and smartphones.
Instead of using electrodes, this method is able to detect the point where the touch occurs by using sensors that can detect or sense minor changes in the electrical current. These changes are created by contact with a finger that creates a change that triggers the sensors to react to the static electrical capacity of the human body.
Unlike resistive film touch technology, capacitive touch technology does not respond to gloved hands or a stylus, they require a naked finger to respond. They are also strongly resistant to dust and water drops while being highly durable and scratch resistant.
Whether it be resistive film touch screen, capacitive touchscreen, or D-series touchscreen technology, there is touch screen technology constantly surrounding us. They make our lives easier and improve customer interaction more and more as technology improves and industries see their benefits. Learn more about how your business can benefit from touchscreen displays at G-Vision USA.