System and method for synchronizing sensing signals of integrated circuit chips
AssigneeSynaptics Incorporated
InventorsJeremy Roberson, David Sobel
Life of this patent
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Abstract
A system and method for synchronizing multiple integrated circuit (IC) chips for an input device having a display device integrated with a capacitive sensing device. A first one of the IC chips is a master IC chip and a second one of the IC chips is a slave IC chip. The master IC chip is configured to transmit synchronization signals to and from the slave IC chip, such that capacitive frames are acquired by each of the IC chips at substantially the same time, the initiation of the sensing signals is synchronized for each of the IC chips and the clock signals of the slave IC chips are synchronized with the clock signal of the master IC chip.
Claims23
An input device, comprising:
- a display panel;
- a plurality of sensor electrodes;
- a master integrated circuit (IC) chip configured to:
- drive a first respective portion of the display panel;
- and
- operate a first respective portion of the sensor electrodes;
- and
- a slave IC chip in communication with the master IC chip, wherein the slave IC chip is configured to:
- drive a second respective portion of the display panel;
- and
- operate a second respective portion of the sensor electrodes;
- wherein the master IC chip is further configured to provide one or more synchronization signals to the slave IC chip for synchronization of display updating and capacitive sensing between the master IC chip and the slave IC chip.
A method for operating a master integrated circuit (IC) chip of an input device having a display panel and a plurality of sensor electrodes, the method comprising:
- driving, by the master IC chip, a respective portion of the display panel;
- operating, by the master IC chip, a respective portion of the sensor electrodes;
- and
- providing, by the master IC chip, one or more synchronization signals to a slave IC chip of the input device for synchronization of display updating and capacitive sensing between the master IC chip and the slave IC chip.
A method for operating a slave integrated circuit (IC) chip of an input device having a display panel and a plurality of sensor electrodes, the method comprising:
- driving, by the slave IC chip, a respective portion of the display panel;
- operating, by the slave IC chip, a respective portion of the sensor electrodes;
- and
- receiving, by the slave IC chip, one or more synchronization signals from a master IC chip of the input device for synchronization of display updating and capacitive sensing between the master IC chip and the slave IC chip.
Dependencies are inferred from the claim text.