US 2019/0102026 A1Published application

Display device

AssigneeJapan Display Inc.

InventorsHiroyuki ABE, Kazune MATSUMURA, Naoki MIYANAGA

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Abstract

A display device having a Near Field Communication (NFC) function and a display panel installed with the touch panel function comprising: the common voltage is applied to all the display electrodes (Tx1 through Txn) during a display operation; the voltage for the touch panel is successively applied to the display electrodes during the touch panel operation; a first circuit, which changes between the display operation and the touch panel operation, is formed at a first side of the display area, a second circuit, which changes between the image display operation and the touch panel operation, is formed at a second side of the display area; the first circuit supplies the voltage for the touch panel to a selected display electrode and supplies the common electrode to other electrodes; the second switch circuit does not supply voltage to the selected display electrode and supplies the common voltage to other electrodes.

Claims10

Dependent claims

A display device having a Near Field Communication (NFC) function and a display panel installed with touch panel function comprising:

a plurality of display electrodes are formed in a display area of the display panel,
a first circuit having a plurality of first switches for changing between a voltage for an image display and for a touch panel operation formed at a first side of the display area,
a second circuit having a plurality of second switches for changing between applying the voltage for an image display and not applying the voltage for the image display at a second side opposite to the first side of the display area,
the first circuit selects one of the plural display electrodes successively, applying the voltage for the touch panel operation to an selected display electrode and applying the voltage for the image display to the plurality of display electrodes other than the selected display electrode,
the second circuit selects one of the plural display electrodes successively, and not applying the voltage for the image display to the selected display electrode.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/145,505Filed 28 Sep 2018
Priority: JP 2017-1942024 Oct 2017
Published: 4 Apr 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 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 3/0416
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means: control or interface arrangements specially adapted for…
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 3/0446
By capacitive means: using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes