# US 10,120,476 B1 · Self-capacitance organic light emitting touch display apparatus

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- Number: US 10,120,476 B1
- Document ID: US10120476B1
- Status: Granted
- Kind: B1
- Application number: 15/588,675
- Filed: 2017-05-07
- Published: 2018-11-08
- Granted: 2018-11-06
- Earliest claimed: 2017-05-07
- Assignees: Superc-Touch Corporation
- Applicants: Superc-Touch Corporation
- Inventors: Hsiang-Yu Lee; Shang Chin; Ping-Tsun Lin; Chia-Hsun Tu
- Web page: https://patentgrep.com/patent/US10120476B1

## CPC

- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/04166: {Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184)}
- G06F 3/0443: {using a single layer of sensing electrodes}
- G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer}
- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G09G 3/3225: using an active matrix
- H10K 59/40: OLEDs integrated with touch screens
- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- G06F 3/0448: {Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality}
- G06F 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
- G06F 2203/04112: Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
- G09G 2354/00: Aspects of interface with display user
- H10K 59/127: comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A self-capacitance organic light emitting touch display apparatus includes a thin film transistor substrate, a common electrode layer, an organic light emitting material layer, at least a touch electrode layer including a plurality of touch sensing electrodes, a display controller, and a touch controller. During touch sensing, the touch controller sequentially or randomly applies a capacitance exciting signal to a selected touch sensing electrode, and senses a touch sensing signal at the selected touch sensing electrode. The touch controller applies a shielding reflection signal to the common electrode layer or a reference point of the display controller.

## Claims

### Claim 1

A self-capacitance organic light emitting touch display apparatus comprising:
a thin film transistor substrate having a plurality of thin film transistors, a plurality of pixel electrodes, a plurality of gate lines and a plurality of data lines arranged on a surface of the thin film transistor substrate, wherein the thin film transistors are respectively connected to the pixel electrodes, the gate lines and the data lines corresponding to the thin film transistors;
a common electrode layer;
an organic light emitting material layer arranged between the common electrode layer and the thin film transistor substrate;
at least one touch electrode layer arranged on a side of the common electrode layer, and the side opposite to the organic light emitting material layer, the at least one touch electrode layer comprising a plurality of touch sensing electrodes;
a display controller having a display power source, and electrically connected to the thin film transistors, the pixel electrodes and the common electrode layer;
a touch controller comprising a touch power source, the touch controller sequentially or randomly applying a capacitance exciting signal to a selected touch sensing electrode, and sensing a touch sensing signal at the selected touch sensing electrode, the touch controller also applying a shielding reflection signal to the common electrode layer or a reference point of the display controller, for the touch controller performing touch sensing, and no common current loop being present between the display controller and the touch controller during touch sensing;
wherein the display controller has a display grounded end and the touch controller has a touch grounded end, and the display grounded end is different from the touch grounded end; and
wherein the display controller is electrically connected with the touch controller through only one physical connection point during touch sensing.

### Claim 2 (depends on 1)

The self-capacitance organic light emitting touch display apparatus of claim 1, wherein the shielding reflection signal is a signal with same phase as that of the capacitance exciting signal or the touch sensing signal.

### Claim 3 (depends on 1)

The self-capacitance organic light emitting touch display apparatus of claim 1, wherein the display controller sequentially outputs a scan signal to a gate line, and outputs a data signal to a data line and outputs a zero volt signal, negative volt signal, or a positive volt signal to the common electrode layer for displaying.

### Claim 4 (depends on 1)

The self-capacitance organic light emitting touch display apparatus of claim 1, further comprising at least a switch arranged between the touch controller and the common electrode layer.

### Claim 5 (depends on 1)

The self-capacitance organic light emitting touch display apparatus of claim 1, further comprising at least a switch arranged between the touch controller and the display controller.

### Claim 6 (depends on 1)

The self-capacitance organic light emitting touch display apparatus of claim 1, further comprising a touch protection layer arranged on a side of the touch electrode layer, and the side being opposite to the organic light emitting material layer, the touch protection layer being a substrate or a cured coating layer.

### Claim 7 (depends on 1)

The self-capacitance organic light emitting touch display apparatus of claim 1, wherein the plurality of touch sensing electrodes are transparent conductive electrodes.

### Claim 8 (depends on 1)

The self-capacitance organic light emitting touch display apparatus of claim 1, wherein the plurality of touch sensing electrodes are metal grid electrodes.

### Claim 9 (depends on 8)

The self-capacitance organic light emitting touch display apparatus of claim 8, wherein the plurality of touch sensing electrodes are black metal grid electrodes.

### Claim 10 (depends on 6)

The self-capacitance organic light emitting touch display apparatus of claim 6, further comprising a color filtering layer and a black matrix layer arranged between the touch protection layer and the common electrode layer.

### Claim 11 (depends on 10)

The self-capacitance organic light emitting touch display apparatus of claim 10, wherein the plurality of touch sensing electrodes are metal grid electrodes, and the metal grid electrodes are arranged at positions corresponding to the black matrix layer.

### Claim 12 (depends on 1)

The self-capacitance organic light emitting touch display apparatus of claim 1, wherein a reference point of the display controller is a power output point, a grounded point, a node of DC loop, or an output point of a display signal driving stage of the display controller.