CASPIAN JOURNAL
MANAGEMENT AND HIGH TECHNOLOGIES
Development of a Projection Capacitive Touchscreen for Embedded Mobile Systems
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Read | Terentev Dmitriy S., Vlasov Andrey I., Tokarev Sergey V. Development of a Projection Capacitive Touchscreen for Embedded Mobile Systems // Caspian journal : management and high technologies. — 2013. — №1. — pp. 16-26. |
Terentev Dmitriy S. - undergraduate student, Bauman Moscow State Technical University, 5, 2nd Bauman St., Moscow, 105005, Russian Federation, terentev.touchtechn@gmail.com
Vlasov Andrey I. - Ph.D. (Engineering), Associate Professor, Bauman Moscow State Technical University, 5, 2nd Bauman St., Moscow, 105005, Russian Federation, terentev.touchtechn@gmail.com
Tokarev Sergey V. - post-graduate student, Bauman Moscow State Technical University, 5, 2nd Bauman St., Moscow, 105005, Russian Federation, terentev.touchtechn@gmail.com
The article discusses various types of modern touchscreens, with a particular focus on creating a projection-capacitive device with higher performance (light transmission of up to 92 % instead of 75–85 %), response time of up to four ms, 125 kHz ADC speed, two-mm-thick touch pad) than the resistive and capacitive screens otherwise used in the mobile market. The cost of manufacturing such a screen, the critique relays, should make the project worthwhile. In addition, the paper relates that the characteristics of the product are similar to those of other projective-capacitive touch panels. These tasks could be resolved, the study says, by using a projection-capacitive panel from a matrix of capacitors and thick-film touchscreen technology. Other devices would include controller chips with triggers to capture contact, nine K155IV1 encoders and six logic elements. In conclusion, the blueprint says that simulated testing of the developed screen on the personal computer has shown that the performance screen conforms to a range of characteristics: supply voltage is 3.7 V, speed is 4.5 ms, and responsiveness to touch of electric capacitance is 100–300 pF (the human body). Moreover, the positioning touch controller is able to operate at a touch voltage of 3.78 V.
Key words: touchscreens,mobile systems,projection,capacitive,thick-film technology,response time,optical transparency,screens,’floating touch’