The great thing about Touch Screen Displays is that they are very easy to use. The touch screen functions like an invisible keyboard, but only displays the data and button selections the user needs to complete the task. This explains their popularity in equipment ranging from ATMs to store kiosks and hospital operating rooms to complex industrial machinery.
When choosing the best touchscreen display for your application, the most important decision will be the type of touchscreen technology to use. There are several types, each with its own advantages and disadvantages. We will study the three most common types:
Touch Screen Displays
Resistance technology
The resistive touchscreen display consists of a glass panel covered with a layer of conductive and resistive metal and separated by thin spaces. When the user touches the screen, the two layers will be touched at that point. The computer detects the change in the electric field and calculates the contact point.
Resistive touch screens are usually the most affordable, but they can only provide about 75% to 80% image clarity. Almost any type of object can activate touch, but sharp objects may damage the outer surface. Resistive touchscreen panels are not affected by surface dust or water; they are the most commonly used type today.
Capacitance technology
In capacitive touchscreen displays, the layer for storing continuous current is located on top of the glass panel of the display. When a bare finger touches the monitor screen, some charge will be transferred to the user. The decrease in capacitance can be detected and located by the circuit located at each corner. Then, the computer recognizes the contact point.
Capacitive Touch Screens are a durable technology commonly used in kiosks, point-of-sale systems, and industrial machinery. Capacitive touch screens have higher definition and longer durability than resistive touch screens. However, capacitive Touch Screen Monitors can only be activated with bare fingers
Surface Acoustic Wave Technology
SAW touchscreen monitors use a series of transducers and reflectors on the side of the Touch Screen Monitors glass panel to create an invisible ultrasonic mesh on the surface. When the panel is touched, part of the wave is absorbed. The receiving transducer determines the position of the touch point and sends this data to the controller.
The SAW touch screen does not have any layers on the screen, so it can achieve more than 90% image resolution and can display high-detail graphics. They can be activated with fingers, gloved hands, or a pointed stylus. However, SAW panels are the most expensive of these three, and surface contamination can cause false triggers. The solid contaminants on the screen will form a non-contact area until it is removed.
Other matters needing attention
Other factors to be considered in the selection process include:
Interface: The touchscreen panel must communicate with the computer. The most common interface types are RS-232 and USB. The new HID-compliant touchscreen display eliminates the need for drivers.
Installation: Options include panel installation, rack installation, and independent installation. If it is free-standing, make sure to use a heavy-duty stand specially designed for touch screens. The standard desktop base will tip over.
Environment: The touchscreen display with standard, stainless steel, and waterproof housing is suitable for a variety of environments.
Screen size: The size of the touchscreen display is 3.5″ to 52″. For large control rooms, the most common sizes are 15″ -19″ and 32″ -42″. The aspect ratio should also be considered.
The type of touchscreen monitor you choose will depend on many factors, including the type of data to be displayed, the target user, the operating environment, and the installation location/method. If you choose the right one, the touchscreen monitor will be an excellent choice for your system.
Golden Margins –Entire Range of Touchscreen Products
We hope you found these touchscreen or panel PC fundamentals informative. Goldenmargins offers a broad selection of Industrial Touchscreen Monitors and Touch Panel PCs in various sizes and configurations, including medical touch screens, sunlight-readable touch screens, open-frame touch screens, and waterproof touch panels, as well as other unique touch screen or panel PC designs. You can learn more about our services HERE or by calling us at +86 755 23191996 or sales@goldenmargins.com
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