Understanding Capacitive Touch Screens Since Apple released the first generation iPhone on June 29, 2007(Honan, Mathew, "Apple unveils iPhone", 2007), the way of using handphone started to change .The biggest change is a handphone could control a big touch screen without using a pen on it. Touch screen interfaces are effective in many other appliances as well, like tablets, laptop and TVs which influences the technological researches in recent 5-6 years. The objective of this essay is to briefly explain the principals involved in the working of capacitive touch technology .The main focus will be on the basics of what is contained inside a capacitive touch screen and what the features are and, how capacitive touch screens work. Image from Sony Mobile A capacitive touch screen consist a first plurality of conductive traces formed on a first glass surface; a plurality of capacitive sense lines between the first plurality of conductive traces; an optically matched insulating layer of silicone dioxide formed over the first plurality of conductive traces with a plurality of openings that expose ends of the plurality of capacitive sense lines; and a conductive layer over the insulating layer that connects to the ends of the plurality of capacitive sense lines through the plurality of openings. (L Mozdzyn - US Patent App. 12/210,140, 2008) All the layers above is called Projected capacitive touch (PCT) technology, which is a capacitive touch-sensing technology allows more accurate and flexible operation, by etching the conductive layer. (Capacitive Touch (Touch Sensing Technologies — Part 2)". TouchAdvance.com) However, Projected capacitive touch (PCT) technology comes in two different types: self-capacitance, and mut... ... middle of paper ... ... – Web.21 May 2014. < http://www.google.com/patents/US20100066700 > "Floating touch." Developer World Floating touch Comments. Sony Mobile, n.d. Retrieved Web. 21 May 2014. . "Capacitive Touch (Touch Sensing Technologies — Part 2)". TouchAdvance.com. Retrieved 21 May 2014. < http://www.touchadvance.com/2011/06/capacitive-touch-touch-sensing.html> L. K. Baxter, Capacitive Sensors: Design and Applications (Wiley-IEEE, 1996). Retrieved 21 May 2014. < http://books.google.co.uk/books?id=Tjd2laRnO4wC&pg=PA156&lpg=PA156&dq=L.+K.+Baxter,+Capacitive+Sensors:+Design+and+Applications&source=bl&ots=NwUVthxIZ_&sig=8w0pnPMoygYiw0HkLs0iSb4uFKk&hl=en&sa=X&ei=kUJ9U5mDOoPA7Aa1xoCgCw&ved=0CEEQ6AEwAQ#v=onepage&q=L.%20K.%20Baxter%2C%20Capacitive%20Sensors%3A%20Design%20and%20Applications&f=false>
Ewald Georg von Kleist is a German scientist who created the capacitor in November of 1745. Regrettably, Kleist did not have the proper paper work to claim in the records that the design of the capacitor was his idea. Many months later, a Dutch professor named Pieter van Musschenbroek created the Leyden jar, the world’s first capacitor (on record). It was a simple jar that was half filled with water and metal above it. A metal wire was connected to it and that wire released charges. Benjamin Franklin created his own version of the Leyden jar, the flat capacitor. This was the same experiment for the more part, but it had a flat piece of glass inside of the jar. Michael Faraday was the first scientist to apply this concept to transport electric power over a large distance. Faraday created the unit of measurement for a capacitor, called Farad.
The first is electrotactile simulation(3). It uses localized electric currents to stimulate targeted nerves using surface electrodes. This method uses no mechanical parts making it light-weight, energy conserving and less noisy in comparison to other non-invasive tactile stimulation methods. The main disadvantage of electrotactile simulation is reported burning sensations from test subjects. The second type of non-invasive tactile stimulation is vibrotactile stimulation (2), which uses mechanical vibrations on the surface of the skin to convey tactile information using varied vibrations frequency, amplitude and duration. It is best-suited for myoelectric protsthetics as it does not interfere with electric signals. Conversely, it may not be suited for older users as their sensitivity to vibrations might be diminished. The final method for non-invasive tactile stimulation is mechanotactile stimulation, which provides the user with pressure or position feedback. It provides the most natural force sensation out of all of the types of non-invasive tactile stimulation but this method also involves the largest and most energy consuming equipment, making it highly impractical to
A change in resistance is observed by changing the current (or voltage), keeping the voltage (or current) constant. Each taxel contains a pressure sensitive crystal in the form of conductive rubber, elastomer or conductive ink. Measuring change in resistance requires a simple circuitry and hence, these are simpler to manufacture. Applied for touch sensing in anthropomorphic hands (Weiss & Worn 2004), piezoresistive tactile sensing, has become popular among the MEMS and silicon type tactile sensors (Woffenbuttel & Regtien 1991; Beebe, Hsieh et al.
Google Glass is a new form of technology that has heads turning everywhere. Glass is a wearable computing device with a frame-like construction that is comparable to everyday glasses. The frame consists of nose pads, a touchpad, and a small heads-up display that lies just above the right eye. The problem is not the device itself, but what the device is capable of. A camera lies beside the displa...
Number one most important way the Apple Ipad will change the way we use technology is through technology interaction. Design is very important in the technology world, and when people can be incorporated into computer and gadget design the way we use and view our gadgets changes. The multi-touch feature already available on the Iphone and Ipod touch will bring computers into the next generation. Multi-touch allows users to zoom and maneuver their digital worlds in a way that typical computer systems lack.
Handheld displays are computing devices with a display that the user can hold in their hands. Video-see-through techniques overlay graphics onto the real environment and employ sensors, such as GPS units, Microelectromechanical systems (MEMS), and accelerometers for their six degrees of freedom tracking. Currently smart-phones and Tablet PCs are the most popular types of handheld device. Smart-phones and tablets are very portable and have many capabilities. They are becoming increasingly more powerful with advances in their hardware and software capabilities. This makes them a very
Jong-Uk Lee, Jeong-Mook Lim, Heesook Shin, and Ki-Uk Kyung, A Haptic Touchscreen Interface for Mobile Devices. December 2013. ACM Digital Library.
These wearable devices can perform many of the same computing tasks as mobile phones and laptop computers; however, in some cases, wearable technology can outperform these hand-held devices entirely. Wearable technology tends to be more sophisticated than hand-held technology on the market today because it can provide sensory and scanning features not typically seen in mobile and laptop devices, such as biofeedback and tracking of physiological function”.
The world exists where people no longer wear just clothes, but a person wears a watch or a shirt that is always functioning and require a minimum of the wearer’s attention. Laptops are no longer need because with wearable computer on him why needs of a lab top. MIThril’s vision of this project is to provide our gifted society with a better way to computing. Laptops are the thing of the past; wearable computer is the step to the future.
Hand Held Devises a small LCD screen can easily and effectively provide a convient output. Just like having a Computer Monitor but smaller and lighter.
Tactile, or touch feedback is the term applied to sensations felt by the skin. Tactile feedback allows users to feel things such as the texture of surfaces, temperature and vibration. Force feedback reproduces directional forces that can result from solid boundaries, the weight of grasped virtual objects, and mechanical compliance of object and inertia. Tactile feedback, as a component of virtual reality simulations, was pioneered at MIT. The term haptics in its broadest sense relates to the study of touch and the faculty by which external objects or forces are perceived through contact with the body. The word itself derives from the Greek haptikos, “able to touch”.
A capacitor is a device for electrical charge. A simple capacitor is two plates made of an electrically conducting material separated by a non-conducting material or dielectric. A capacitor can come in a huge variety of sizes and types for use in regulating power as well as for conditioning, smoothing and isolating signals. Almost every electrical and electronic system uses them. [1]
"The Evolution of Cell Phone Design Between 1983-2009." Webdesigner Depot RSS. N.p., n.d. Web. 23 Oct. 2013.
A capacitor is a device contained by an electric circuit, which stores electric charge. They are commonly used in computers, televisions and all electronic circuits such as car ignition circuits and some electric power tools. They play a significant role in electronic circuits, such that without capacitors the will be a limitation of electronic circuits. Capacitors do not have the ability to conduct electric charge like other components of the circuit do, but can store the electric charge and that makes it very useful and unique from other devices. If the capacitors were to conduct the electric charge no charge would be stored, as the two oppositely charged plates will fail to keep separate and then attract each other. Capacitors which start to conduct in a circuit have a fault and must be removed as they will not store any charge (John. 1989).
Headphone is the “electro-acoustic transducer for converting electric signals into sounds.” There are electronic devices shown in fig.1 and fig.2 that have similar function as headphone. However, it is not reasonable to call them headphones in modern society. In order to distinguish the headphone in this paper from other similar electronic devices, the headphone refers to the one that is held over the ear.