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
Apparatus and method for efficient transmission of acknowledgements
In-vehicle communication system and method of operation
Managing delivery of application server content
Display for displaying three-dimensional images and method for displaying three-dimensional images
Assisting apparatus, method, and program for checking crosstalk noise between hierarchized modules in a semiconductor circuit
Test framework of visual components in a multitenant database environment
Method and apparatus for coordinating hopping of resources in wireless communication systems
  Randomly Featured Patents
Volume holographic diffusers
Printing with varied dot-recording rate with respect to each printing region
Automobile sun visor
Silica flour containing reinforced resin compositions and articles formed thereof
Myostatin regulatory region, nucleotide sequence determination and methods for its use
Ledger hanger for geodesic domes
Electrical outlet cover with butterfly graphic
P-selectin targeting ligand and compositions thereof
Storage life of Pb-In-Ag solder foil by Sn addition
Child monitoring device