Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Optical keypad for electronic device










Image Number 5 for United States Patent #7924175.

Disclosed in a wearable electronic device including an optical keypad supported by a keypad housing. The optical keypad may include a plurality of keys disposed along the keypad housing, and a plurality of illumination sources and optical receivers with a corresponding illumination source and optical receiver for each of the plurality of keys. The keypad signal interface may be limited to three connections, to provide a connection for power, a connection for ground, and a connection for data between the keypad housing and the main housing. The electronic device may also include at least one optical receiver configured to be optically coupled to at least one of the plurality of illumination sources, and configured to convert a received optical signal representing data into an electrical signal representing data. The illumination sources may provide optical signals during key presses, and may in addition provide key illumination for unpressed keys.








 
 
  Recently Added Patents
Mirac proteins
Cover panel for frame based door lock
Presenting a link to a user
PCSK9 antagonists
Spark plug
Mobile terminal and controlling method thereof
Community profiling for social media
  Randomly Featured Patents
Control panel
File storage service system, file management device, file management method, ID denotative NAS server and file reading method
Systems and methods of forming refractory metal nitride layers using disilazanes
Motor vehicle transmission with a system for the detection of the shift position selected in the motor vehicle transmission
Method and device for cooling and lubricating rollers on a rolling stand
Tile holding fixture assembly
Solid state imaging device and camera system
Shutter blind
Optical printer
Method and apparatus for laying out power wiring of semiconductor