Types of Touchscreens for HMI

Capacitive touchscreens are commonly used in membrane switches due to their high touch sensitivity, multi-touch capabilities, and durability. They operate based on the principles of capacitive sensing, detecting changes in electrical charge when a conductive object (like a finger) comes into contact with the screen. Capacitive touchscreens offer excellent responsiveness and support various gestures like tapping, swiping, and pinch-to-zoom.

Projected Capacitive (PCAP) touchscreens feature a glass overlay with a grid of micro-fine wires embedded within. When a finger or conductive object touches the screen, it creates a disruption in the electrical field, allowing for precise touch detection. PCAP touchscreens deliver excellent touch accuracy, support multi-touch gestures, and are highly durable. Projected Capacitive touch screens can register multiple simultaneous touch commands whereas surface capacitive touchscreens can only register a single touch. They are commonly used in smartphones, tablets, and high-end touch displays.

Understand the specific requirements of your application. Consider factors such as the intended use, environment, desired touch sensitivity, durability, and expected user interactions. Determine if the touchscreen needs to support multi-touch gestures, work with gloves, or operate in harsh conditions like outdoor or industrial environments. These requirements will help narrow down the suitable touchscreen technologies.

Assess the durability and environmental requirements of your project. If the touchscreen will be subjected to harsh conditions such as extreme temperatures, moisture, or exposure to liquids, opt for ruggedized or waterproof touchscreens. Consider the durability of the touchscreen surface, resistance to scratches, and the expected lifespan of the technology.

Conduct testing and rapid prototyping to evaluate the performance and suitability of the touchscreen for your specific application. This can help uncover any compatibility issues, assess the user experience, and validate the touchscreen’s functionality before making a final decision.

At JN White, we understand the importance of seamless user experiences and efficient interface design. That’s why we leverage the power of Optically Clear Adhesive (OCA) to adhere our membrane switches to touchscreens, offering a multitude of benefits for our customers.

Optically Clear Adhesive (OCA), is a highly transparent adhesive material used in bonding applications. It is specifically designed to provide a crystal-clear optical bond between two surfaces, such as a membrane switch and a touchscreen. OCA offers exceptional transparency and optical clarity, allowing for a vivid and unobstructed viewing experience. The ultra-thin nature of OCA helps maintain the sensitivity and responsiveness of touchscreens. The adhesive provides a direct interface between the user’s touch and the underlying electronics, resulting in accurate and precise touch inputs.

Our expert assembly technicians carefully apply OCA in a controlled environment, ensuring precise alignment and optimal performance. This meticulous process guarantees that our membrane switches seamlessly integrate with touchscreens, resulting in a smooth and responsive user interface.

At JN White, we specialize in delivering exceptional complex user interfaces with touchscreen assemblies. With years of experience in the industry, we have amassed a wealth of knowledge and expertise in designing and assembling complex user interfaces with touchscreen technology. Our dedicated team of professionals has successfully executed numerous projects, delivering innovative and functional solutions across a wide range of industries.

To deliver superior results, we leverage cutting-edge technology and adhere to the highest quality standards. We stay up to date with the latest advancements in touchscreen technology, ensuring that our solutions incorporate the most innovative and reliable components.