Patents Assigned to Semtech International AG
  • Circuit and method for controlling a liquid crystal segment display
    Patent number: 8456383
    Abstract: Circuit and method for controlling a liquid crystal segment (1) display wherein the shape of the control signals of the segments (e1, e2, b1, b2) is adapted according to a supply voltage (Vdd) so as to compensate at least partially the opacity variations caused by the supply voltage variations.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: June 4, 2013
    Assignee: Semtech International AG
    Inventors: Michel Chevroulet, Gregoire Guye
  • Method and device for controlling the backlighting of a flat screen
    Patent number: 8259058
    Abstract: Electronic circuit designed to control the level of lighting produced by light diodes in a flat screen. The circuit uses a PDM modulator in order to generate a control signal (Vc) with a number of pulses by period that depends on the desired level of lighting. The advantage is to reduce the energy in the low frequencies.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: September 4, 2012
    Assignee: Semtech International AG
    Inventor: Michel Chevroulet