Resources Contact Us Home
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
Configurations and methods for effluent gas treatment
Control apparatus and control method
Soybean cultivar BY0811143
Method and system of extending battery life of a wireless microphone unit
Charging member, electrophotographic apparatus, and process cartridge
Hydrolases, nucleic acids encoding them and methods for making and using them
  Randomly Featured Patents
Optical rotary encoder with adjustably positioned light source
Fuser for use in an electrophotographic print engine
Systems and methods for deblurring data corrupted by shift variant blurring
Liquid crystal display having a sensing unit and pixel unit sharing the same data line
Clamping device for a multiple-part gliding board, in particular snowboard
Dynamic spinal stabilization assembly with sliding collars
Full automatic coating system for coating various types of products produced in small quantities
Adjustable hunting stand system
Tiltable mount
Semiconductor device containing a dummy wire