Patents Assigned to Questech International, Inc.
  • Patent number: 6322229
    Abstract: Embodiments of a peripheral backlighting system for keyboards are shown and described, which include one or more light-emitting panels exterior to the keyswitches of the keyboard. The panels are preferably electroluminescent material and surround at least two sides, and preferably all sides, of the stem of a keyswitch or the space in which the stem slides up and down during use. Alternatively, the electroluminescent panel(s) may extend substantially continuously between and underneath a plurality of keyswitches. The panels extend closely adjacent to the stem or stem path, or under the keyswitch, to be as far under the key cap as possible without extending into the stem or cap of the keyswitch. The EL panels are preferably powered by the computer keyboard port, via voltage inverters. Preferably, the keyswitch is translucent or partially translucent, and the base plate over the EL panels, if any, is at least partially translucent or transparent.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: November 27, 2001
    Assignee: Questech International, Inc.
    Inventors: Sam E. J. Chan, King Sum Chu, W. Edward Church, Randall Krafft