US 2020/0004378 A1Published application

Electronic display adaptive touch interference scheme systems and methods

AssigneeApple Inc.

InventorsAnshi Liang, He Yi, Yang Xu, Paolo Sacchetto, Jun Li, Jingyu Huang, Marc Joseph DeVincentis, Yue Jack Chu

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Abstract

Display-to-touch noise may be perceptible when a touch image generated during an active period of an electronic display of an electronic device is used to determine a touch indication on the display. The electronic device may include a display pixel layer including a plurality of display pixels that write display images to the display during a display active period and continue displaying the display image during a display blanking period. The electronic device may also include a touch sense layer including a plurality of touch sense pixels that facilitate generation of a first touch image during a first display active period and generation of a second touch image during a first display blanking period. The electronic device may further include a controller coupled to the display pixel layer and the touch sense layer that facilitates the reduction or elimination of display-to-touch interference. In particular, the controller may determine a first noise metric associated with touch images generated during the first display active period and a second noise metric associated with touch images generated during the first display blanking period. Further, the controller may instruct the touch sense layer to not generate touch images during a second display active period in response to the first noise metric being greater than a noise threshold and the second noise metric not being greater than the noise threshold.

Claims20

Dependent claims

An electronic device comprising:

a display pixel layer comprising a plurality of display pixels, wherein the display pixel layer is configured to:
write a first display image during a first active period by controlling electrical energy stored in each of the plurality of display pixels based at least in part on first display image data corresponding with the first display image;
and
continue presenting the first display image during a first blanking period directly after the first active period;
a touch sense layer comprising a plurality of touch sense pixels, wherein the touch sense layer is configured to:
generate a first touch image based at least in part on electromagnetic interaction with the plurality of touch sense pixels during a first touch scan period that overlaps with the first active period;
and
generate a second touch image based at least in part on at least in part on electromagnetic interaction with the plurality of touch sense pixels during a second touch scan period that overlaps with the first blanking period;
and
a controller communicatively coupled to the display pixel layer and the touch sense layer, wherein the controller is programmed to:
determine a first noise metric indicative of display-to-touch noise resulting during active periods of the display pixel layer based at least in part on the first touch image determined during the first active period;
determine a second noise metric indicative of display-to-touch noise resulting during blanking periods of the display pixel layer based at least in part on the second touch image determined during the first blanking period;
and
instruct the touch sensor layer to not generate a third touch image during a second active period used to write a second display image after the first display image in response to the first noise metric being greater than a noise threshold and the second noise metric not being greater than the noise threshold.

11 more elements

A method for controlling operation of an electronic device implemented with a display pixel layer and a touch sense layer, comprising:

determining, using a controller, a first noise metric indicative of display-to-touch noise resulting during active periods of the display pixel layer based at least in part on a first touch image determined during a first active period by the touch sense layer;
determining, using the controller, a second noise metric indicative of display-to-touch noise resulting during blanking periods of the display pixel layer based at least in part on a second touch image determined during a first blanking period by the touch sense layer;
and
instructing, using the controller, the touch sense layer to not generate a third touch image during a second active period used to write a display image in response to the first noise metric being greater than a noise threshold and the second noise metric not being greater than the noise threshold.

1 more element

A tangible, non-transitory, computer-readable medium that stores instructions executable by one or more processors of an electronic device, wherein the instructions comprise instructions to:

instruct, using the one or more processors, the electronic device to determine a first noise metric indicative of display-to-touch noise resulting during active periods of the display pixel layer based at least in part on a first touch image determined during the first active period by the touch sense layer;
instruct, using the one or more processors, the electronic device to determine a second noise metric indicative of display-to-touch noise resulting during blanking periods of the display pixel layer based at least in part on a second touch image determined during the first blanking period by the touch sense layer;
and
instruct, using the one or more processors, the touch sense layer to not generate a third touch image during a second active period used to write a display image in response to the first noise metric being greater than a noise threshold and the second noise metric not being greater than the noise threshold.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 16/436,756Filed 10 Jun 2019
Priority: 27 Jun 2018
Published: 2 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G06F 3/0418
Control or interface arrangements specially adapted for digitisers: for error correction or compensation, e.g. based on parallax, calibration or…
G06F 3/04184
For error correction or compensation, e.g. based on parallax, calibration or alignment: synchronisation with the driving of the display or the…
G06F 3/0412
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means: digitisers structurally integrated in a display
G06F 3/044
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means: by capacitive means