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Touch switches detect position, command variations

Posted: 01 Sep 2009     Print Version  Bookmark and Share

Keywords:touch switch  touchscreen  capacitive technology 

Optrex touch switch

Optrex has introduced a new capacitive touch switch based on technology experience gained in the smart phone market. This capacitive touch switch detects variations in position and command. This technology offers the highest standards of optical performance with ease of design. Capacitive touch solutions focus on applications like human machine interface, handheld terminal, gaming, medical equipment, point-of-sale and mobile.

The new touch switch solutions provide outstanding clarity and easy design. The new capacitive touch switch technology eliminates air gaps and reduces the number of layers. An improved visibility results from less reflectivity and higher transparency of the as well thinner display sensor stack (0.5mm—0.7mm thickness in viewing area ). The new solutions not only offer high optical performance but also are more compact and light weight. The capacitive touchscreen responds to control input from a finger without requiring the application of any pressure. The structure is very robust and has no wear out of the sensor elements. Lifetime is about 10 crore touches. It is also durable against various liquids as well as easy to clean.

In addition, the new touch switch solution from Optrex has a transparency of min. 95 per cent and the reflection is less than 15 per cent. The operating temperature is indicated with -20°C—+70°C.

Products based on the capacitive touch technology are currently available for demonstration and design-in purpose in 3-inch (T-55149) and 3.5-inch (T-55343). Additional sizes in 5.7-inch (T- 55265) and 6.5-inch (T-51750) will soon be available. Our touch switch solution is available alone or with TFT.

- Henri Arnold
EE Times Europe

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