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
Computer network running a distributed application
Organic light emitting diode device and fabrication method thereof
Unsupervised document clustering using latent semantic density analysis
Printing device, printing system, program, and printing method for printing based on print data from a user authorized to issue a print instruction for the print data
Promoting content
Driving apparatus having an optical sensor and a thermal sensor for thermal and aging compensation of backlight module and driving method of backlight module
Monitoring agent programs in a distributed computing platform
  Randomly Featured Patents
Analog front end circuit for converting analog signal outputted by image sensor into digital signal
Expendable metal detector
Aquarium waterfall assembly
Carbon monoxide clean-up in a PEM fuel cell system
Method of producing frozen casting moulds
Method for supplying dressings to a cylinder of a printing machine
Single lever draw latch
Motor driven endless tray accumulator for dishwashing
Windstrap for pliable roll-type overhead door
Surge absorber