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
Melting furnace including wire-discharge ion plasma electron emitter
System and method for transmitting a low density parity check signal
Thin film lithium-based batteries and electrochromic devices fabricated with nanocomposite electrode materials
Formulations containing sorbitan carboxylic acid ester
Method of making an insulated gate semiconductor device and structure
Lift axle suspension systems incorporating compression coil springs
Dynamic chunking for delivery instances
  Randomly Featured Patents
Semiconductor device and a method for making the same that provide arrangement of a connecting region for an external connecting terminal
Surgical gown
Sliding shoe fairlead with an integrated chain stopper
Plastic container
Method, computer program product, and system for global refresh of cached user security profiles
Low inflation warning device for pneumatic tires
Attachment device for electrical discharge machine
Decorative candle
Process for the exchange of a detection module hybridized by welding bumps
Wet wipe dispenser