US 11,231,799 B2Granted

Touch display device

AssigneeLG Display Co., Ltd.

InventorsRu-Da Rhe, Ji-Hyun Jung, Deuk-Su Lee, Sang-Kyu Kim, Jae-Gyun Lee, Hyang-Myoung Gwon

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Abstract

A touch display device includes a touch sensing electrode and a touch drive electrode disposed on an encapsulation unit configured to encapsulate a light-emitting element, the touch sensing electrode and the touch drive electrode being configured to form a first mutual capacitor, and first and second compensation electrodes disposed in a non-active area of a substrate so as to be opposite each other, the first and second compensation electrodes being configured to form a second mutual capacitor, whereby the value of capacitance of all mutual capacitors is increased, and therefore it is possible to prevent deterioration in touch performance.

Claims20

Dependent claims

A touch display device comprising:

a substrate having an active area and a non-active area excluding the active area;
a light-emitting element disposed in the active area of the substrate;
an encapsulation unit disposed on the light-emitting element;
a touch sensing electrode and a touch drive electrode disposed on the encapsulation unit and constituting a first mutual capacitor having a first capacitance value;
a touch sensing line disposed in the non-active area and connected to the touch sensing electrode;
a touch drive line disposed in the non-active area and connected to the touch drive electrode;
and
a compensation circuit disposed in the non-active area and having a second capacitance value greater than the first capacitance value,
wherein the compensation circuit includes a first compensation electrode and a second compensation electrode,
the second compensation electrode is connected to the touch drive line, and
the first compensation electrode is connected to the touch sensing line through a connection line and overlaps with the second compensation electrode.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/922,667Filed 7 Jul 2020
Priority: KR 10-2019-009807312 Aug 2019
Published: US 2021/0048907 A118 Feb 2021
Granted: 25 Jan 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G06F 3/04164
Control or interface arrangements specially adapted for digitisers: connections between sensors and controllers, e.g. routing lines between…
G06F 3/0412
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means: digitisers structurally integrated in a display
G06F 3/0418
Control or interface arrangements specially adapted for digitisers: for error correction or compensation, e.g. based on parallax, calibration or…
G06F 3/0443
By capacitive means: using a single layer of sensing electrodes