US 11,029,774 B2Granted

Touch panel in which cathodes serve as touch sense electrodes and a touch screen formed using the touch panel

AssigneeBoe Technology Group Co., Ltd.

InventorsShengji Yang, Xue Dong, Xiaochuan Chen, Pengcheng Lu, Lei Wang, Zhi Wang, Weifeng Han, Jing Yu

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Abstract

The present disclosure relates to a touch panel and a touch screen. In the touch panel, the cathode is reused. In the touch control stage, each of the cathodes serves as a touch electrode, and normal display and touch functions of the touch panel can be realized by a time-division driving manner. Specifically, in the display stage, the pixel circuit controls the light emitting state of each pixel point (each pixel point has a light emitting device including a cathode); in the touch control stage, touch control signals are applied onto all control signal terminals of the pixel circuit and the cathodes at the same time. By doing so, on the basis that the touch control function can be realized, the synchronous driving of the touch control electrodes and the electrodes corresponding to the touch control electrodes can be realized.

Claims18

Dependent claims

A touch panel, comprising:

a plurality of cathodes;
touch wires and touch driving chips individually corresponding to one of the cathodes;
and
pixel circuits each disposed in one of pixel units, each of which comprises a light emitting device having one of the cathodes;
wherein:
in a display stage, each of the pixel circuits is configured to drive the light emitting device to emit light normally under control of control signal terminals;
and
in a touch control stage, each of the touch driving chip is configured to apply a touch control signal to one of the cathodes through one of the touch wires, wherein each of the cathodes serves as a touch electrode, and apply control signals to the control signal terminals of one of the pixel circuit, wherein the control signals applied to the control signal terminals of one of the pixel circuit are modulated in the touch control stage and modulation of the control signals applied to the control signal terminals of one of the pixel circuit is synchronous with modulation of the touch control signal in the touch control stage, and the control signals applied to the control signal terminals comprises a reset signal, a scan signal, a light emission control signal, a initialization signal, a power signal, a ground power supply signal, and a data signal,
wherein the display stage and the touch control stage do not overlap.

6 more elements

A touch screen, comprising a touch panel;

wherein the touch panel comprises:
a plurality of cathodes;
touch wires and touch driving chips individually corresponding to one of the cathodes;
and
pixel circuits each disposed in one of pixel units, each of which comprises a light emitting device having one of the cathodes;
wherein:
in a display stage, each of the pixel circuits is configured to drive the light emitting device to emit light normally under control of control signal terminals;
and
in a touch control stage, each of the touch driving chip is configured to apply a touch control signal to one of the cathodes through one of the touch wires, wherein each of the cathodes serves as a touch electrode, and apply a control signal to the control signal terminals of one of the pixel circuit, wherein the control signals applied to the control signal terminals of one of the pixel circuit are modulated in the touch control stage and modulation of the control signals applied to the control signal terminals of one of the pixel circuit is synchronous with modulation of the touch control signal in the touch control stage, and the control signals applied to the control signal terminals comprises a reset signal, a scan signal, a light emission control signal, a initialization signal, a power signal, a ground power supply signal, and a data signal,
wherein the display stage and the touch control stage do not overlap.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/029,162Filed 6 Jul 2018
Priority: CN 201710882530.726 Sep 2017
Published: US 2019/0095016 A128 Mar 2019
Granted: 8 Jun 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 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 3/04184
For error correction or compensation, e.g. based on parallax, calibration or alignment: synchronisation with the driving of the display or the…
G06F 3/0443
By capacitive means: using a single layer of sensing electrodes
G09G 3/3225
Organic, e.g. using organic light-emitting diodes [OLED]: using an active matrix

Family

US 2019/0095016 A1Pre-grant publication · published 28 Mar 2019
US 11,029,774 B2This patent

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

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