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
Card reader device
Method of bonding metallic members, and metallic bonded body
Method for increasing expression of active tumor necrosis factor receptor family member-Ig fusion proteins
Illumination unit for a direct-view display
Touch screen tablet
  Randomly Featured Patents
Bis-imido carbonate sulphones
Product indentification tag for flat bar hook
Air fluidized bladders for a bed
Toner additive comprising carbon-silica dual phase particles
Wall mounted retractable motorcycle cover
Two speed induction motor with tapped auxiliary winding
Intermittent receiving system
Maintaining remote queue using two counters in transfer controller with hub and ports
Color image correction device for correcting phase and resolution characteristics of a copy image using different color signal components