Touch technology

Disponível somente no TrabalhosFeitos
  • Páginas : 10 (2346 palavras )
  • Download(s) : 0
  • Publicado : 13 de maio de 2011
Ler documento completo
Amostra do texto
FATEC-SP Faculdade de Tecnologia de São Paulo

|Curso: |Análise e Desenvolvimento de Sistemas |
|Período: |Noturno |
|Disciplina: |Inglês Instrumental I|
|Prof.: |Rosângela |

São Paulo - 2009
Index

1. Text I: The Clipboard Technology 3

2. Text II: How Does a Touchscreen Works 4

3 The Group Work.

3.1 Comparison: Clipboard versus Touchscreen 5

3.2 Review: Uma CrescenteIntegração 6

4. Bibliography 7

Delete Keys - Clipboard Technology

For The Last Generation

Silicon Valley and Tokyo have been working to design computers that are ever easier to use. There is one thing, however, that has prevented the machines from becoming their user-friendliest: you still have to input data with a keyboard, and that can require you to do a lot of typing and to memorize alot of elaborate commands.
Enter the clipboard computer, a technology that has been in-development for the last 20 years but took hold in the mass market only this year. Clipboard PCs – which, as their name suggests, are not much bigger than an actual clipboard - replace the keyboard with a liquid crystal display (LCD) screen and an electronic stylus. Users input data by printing individualletters directly on the screen.
There are two technologies at work in a clipboard PC: one allows raw data to get into the computer and the other allows the computer to figure out what that data means. The first technology relies principally on hardware and varies depending on the particular computer. In one system, marketed under the name GRID-Pad, the computer's LCD screen is covered by asheet of glass with a transparent conductive coating. Voltage is sent across the glass in horizontal and vertical lines forming a fine grid; at any point on the grid, the voltage is slightly different. When the stylus - which is essentially a voltmeter - touches the screen, it informs the computer of the voltage at that point. The computer uses this information to determine where the stylus isand causes a liquid crystal pixel to appear at those coordinates. The position of the stylus is monitored several hundred times a second, so as the stylus moves across the glass, whole strings of pixels are activated.
'What we do is sort of connect the dots,' says Jeff Hawkins, the creator of GRID-Pad. 'Users can then write whatever they want on the screen with a kind of electronic ink.'Making that writing comprehensible to the computer, however, requires the help of some powerful software. When the stylus is being used, the computer is programmed to look for moments when the tip does not touch the screen for a third of a second or more. Every time this happens - and it happens a lot when somebody is printing - the software assumes that one letter or number has been written.The pixel positions of this fresh character are then passed on to the computer’s pattern recognition software, which instantly identifies the letter or number written.
Making that writing comprehensible to the computer, however, requires the help of some powerful software. When the stylus is being used, the computer is programmed to look for moments when the tip does not touch the screen fora third of a second or more. Every time this happens - and it happens a lot when somebody is printing -the software assumes that one letter or number has been written. The pixel positions of this fresh character are then passed on to the computer's pattern recognition software, which instantly identifies the letter or number written.
The software does this by first cleaning up the...
tracking img