US 2015/0103034 A1Published application

In-cell low power modes

AssigneeSynaptics Incorporated

InventorsPetr SHEPELEV, David S. SABO, Erol ERYILMAZ

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Abstract

Embodiments described herein include a method and apparatus for capacitive sensing in input devices integrated with a display device. In one embodiment, a processing system for a display device comprising an integrated capacitive sensing device is provided that includes a display driver module, a transmitter module, and a receiver module. The display driver and transmitter modules are configured to operate in a display update mode and a sleep mode. The receiver module is configured to, while operating in a doze mode, communicate with and trigger the transmitter module to enter the active sensing mode while the display driver module remains in the sleep mode when presence of an object is detected based on the resulting signals.

Claims20

Dependent claims

A processing system for a display device comprising an integrated capacitive sensing device, the processing system comprising:

a display driver module configured to update a display of the display device while in a display update mode and configured not to update the display device while in a sleep mode,
a transmitter module comprising transmitter circuitry configured to, while in an active sensing mode, drive transmitter signals onto a first plurality of sensor electrodes of the capacitive sensing device for capacitive sensing;
and
a receiver module configured to receive resulting signals from a second plurality of sensor electrodes, the resulting signals comprising effects corresponding to the transmitter signals, the receiver module communicatively coupled to the display driver module and the transmitter module, the receiver module configured to, while operating in a doze mode, communicate with and trigger the transmitter module to enter the active sensing mode while the display driver module remains in the sleep mode when presence of an object is detected based on the resulting signals.

1 more element

A method for operating a display device comprising an integrated capacitive sensing device, the method comprising:

changing an output state of a receiver module from a first output state to a second output state in response to determining presence of an object from signals received from sensor electrodes by the receiver module operating in a first capacitive sensing mode;
switching a transmitter module from a sleep mode to an active touch mode in response to the change in the output state of the receiver module;
and
driving transmitter signals from the transmitter module onto sensor electrodes of the capacitive sensing device for capacitive sensing while in the active touch mode.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 14/187,220Filed 21 Feb 2014
Priority: 16 Oct 2013
Published: 16 Apr 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G06F 3/041662
Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving: using alternate mutual and…
G06F 1/3262
Power saving in peripheral device: power saving in digitizer or tablet
G06F 3/0412
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means: digitisers structurally integrated in a display
G06F 3/0446
By capacitive means: using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Family

Application61/891,843Us provisional application · filed 16 Oct 2013
US 10,025,412 B2Related patent
US 2015/0103034 A1This patent

From the US filing history. Foreign family members aren’t listed.

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