US 9,870,105 B2Granted

Far-field sensing with a display device having an integrated sensing device

AssigneeSynaptics Incorporated

InventorsPetr Shepelev, Adam Schwartz

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Abstract

Embodiments of the present invention generally provide an input device comprising a display device integrated with a capacitive sensing device. The input device includes a plurality of transmitter electrodes, each transmitter electrode comprising one or more common electrodes configured to be driven for display updating and capacitive sensing, a plurality of near-field receiver electrodes configured to perform capacitive sensing in a near-field sensing region, and a plurality of far-field receiver electrodes configured to perform capacitive sensing in a far-field sensing region. The input device further includes a processing system coupled to the plurality of transmitter electrodes, the plurality of near-field receiver electrodes, and the plurality of far-field receiver electrodes. The processing system is configured to determine a near-field capacitive image based on the first resulting signals received from the near-field receiver electrodes and determine a far-field capacitive image based on the second resulting signals received from the far-field receiver electrodes.

Claims23

Dependent claims

An input device comprising a display device integrated with a capacitive sensing device, the input device comprising:

a plurality of transmitter electrodes, each transmitter electrode comprising one or more common electrodes configured to be driven for display updating and capacitive sensing;
a plurality of near-field receiver electrodes configured to perform capacitive sensing in a near-field sensing region disposed between an input surface of the input device and a far-field sensing region;
a plurality of far-field receiver electrodes configured to perform capacitive sensing in the far-field sensing region, wherein a geometric property of a far-field receiver electrode included in the plurality of far-field receiver electrodes is different than the geometric property of a near-field receiver electrode included in the plurality of near-field receiver electrodes;
and
a processing system coupled to the plurality of transmitter electrodes, the plurality of near-field receiver electrodes, and the plurality of far-field receiver electrodes, the processing system configured to:
drive the plurality of transmitter electrodes for capacitive sensing;
receive first resulting signals with the plurality of near-field receiver electrodes when the plurality of transmitter electrodes are driven for capacitive sensing;
determine a near-field capacitive image based on the first resulting signals;
receive second resulting signals with the plurality of far-field receiver electrodes when the plurality of transmitter electrodes are driven for capacitive sensing;
and
determine a far-field capacitive image based on the second resulting signals.

8 more elements

A processing system for a display device integrated with a capacitive sensing device comprising:

a driver module comprising driver circuitry, the driver module coupled to a plurality of common electrodes configured to be driven for display updating and capacitive sensing;
a receiver module coupled to a plurality of near-field receiver electrodes and a plurality of far-field receiver electrodes, wherein a geometric property of a far-field receiver electrode included in the plurality of far-field receiver electrodes is different than the geometric property of a near-field receiver electrode included in the plurality of near-field receiver electrodes, the receiver module configured for:
receiving first resulting signals with the plurality of near-field receiver electrodes when the plurality of common electrodes are driven for capacitive sensing, wherein the plurality of near-field receiver electrodes are configured for performing capacitive sensing in a near-field sensing region disposed between an input surface of the capacitive sensing device and a far-field sensing region;
and
receiving second resulting signals with the plurality of far-field receiver electrodes when the plurality of common electrodes are driven for capacitive sensing, wherein the plurality of far-field receiver electrodes are configured for performing capacitive sensing in the far-field sensing region;
and
a determination module configured for:
determining a near-field capacitive image based on the first resulting signals;
and
determining a far-field capacitive image based on the second resulting signals.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/040,589Filed 27 Sep 2013
Published: US 2015/0091840 A12 Apr 2015
Granted: 16 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G06F 3/0412
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means: digitisers structurally integrated in a display
G06F 3/04166
Control or interface arrangements specially adapted for digitisers: details of scanning methods, e.g. sampling time, grouping of sub areas or time…
G06F 3/0443
By capacitive means: using a single layer of sensing electrodes
G06F 3/0445
By capacitive means: using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer