A resistive touch screen display consists of two flat panels, a common liquid crystal display (LCD) substrate and a light-emitting diode (LED) display panel. Between the panels is a layer of indium tin oxide (ITO), which is in most LCD displays. When a user touches an object on one of the flat panels, the energy produced by the finger is captured by the LED display panel and converted into electrical signals, which are then sent to the CPU via the USB connector.
Resistive devices run on a single chip – the logic layer. One example of a resistive touch screen display device is the Palm OS Plus. This display uses two resistive layers, the upper one featuring a full QWERTY keyboard, the lower one a hardware layer dedicated to touchscreen operation. The chip contains multiple LED display elements – each of which is composed of one LED, three micro LEDs and an audio amplifier. The display runs off of a single chip only, which makes for very flexible implementation options as compared to other devices.
Capacitive screen displays, meanwhile, use the concept of pressure sensing. Unlike resistive touch screen display devices, capacitive touch devices use a combination of two layers. One layer can be made up of a regular resistive layer, which is sensitive to capacitance – the electrical charge carried by the electric charge of an ionic molecule. The second layer can be made up of a regular layer of silicon (or other material), wherein the charge of the charged ions is detected.
As resistive touch screen monitors have their own integrated circuitry, the two layers need to communicate with each other in some way. In this case, they use a transfer switch, which allows the electronic signal to be transferred between the two layers using conductors. The transfer switch is typically implemented on the motherboard of the device in question. Other implementations include infrared technology and capacitive technology. In essence, the transfer switch acts as a gatekeeper of sorts to stop or prevent the electric current from flowing between the two layers.
Capacitive monitors, on the other hand, use the theory of piezoelectricity. When a charge is applied to a material, the surface charges up giving a net positive charge. In this instance, the resistive touch screen monitor utilizes piezoelectric crystals to generate the electrical charge, which is then picked up by the LED display. It may sound complicated, but this type of touch screens has been around for many years already, long before the capacitive type came onto the scene. As such, many businesses have switched over to using resistive touch screens due to the increased functionality that they offer.
In the past, resistive touch screen displays were far superior to capacitive displays. The only real difference between these two technologies was their thickness: resistive touch screens were usually thinner than capacitive screens. In today’s world, though, many companies have moved away from using resistive touch screens for their business because they are unable to provide a fast response time to their customers. The end result is that they spend a lot more money repairing phones that have problems with touch response times. In the case of some businesses, this means less profit for the company.
Capacitive monitors, on the other hand, are capable of providing a much faster response time. Their problem, however, is that they are extremely sensitive to finger pressure, which makes it difficult to use them on phones that are not touch sensitive. Instead, the better quality capacitive monitors are used on laptop computers. This type of display is also used in tablet computers and other similar devices. A capacitive screen can be used as a monitor for input by pointing a finger at the screen or tapping an external device that is used as a input device.
Resistive screens are very popular for business uses because of their ability to resist damage. The lack of sensitivity means that the resistive screen display will not get very hot while the finger is working on it. This makes it easy to use the screen without having to constantly touch the screen in order to perform functions such as inputting data into a computer system. While resistive screens are generally thinner than capacitive screens, they do tend to be a little more expensive. If you are going to be purchasing a touch screen display for a business application, then the resistive type is probably the better option.