# US 12,217,692 B2 · Organic light emitting diode display

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- Number: US 12,217,692 B2
- Document ID: US12217692B2
- Status: Granted
- Kind: B2
- Application number: 18/119,419
- Filed: 2023-03-09
- Published: 2023-07-06
- Granted: 2025-02-04
- Earliest claimed: 2018-11-28
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Ji Su Na; Joong-Soo Moon; Chae Han Hyun; Yang Wan Kim
- Web page: https://patentgrep.com/patent/US12217692B2

## CPC

- G09G 3/325: the data current flowing through the driving transistor during a setting phase, e.g. by using a switch for connecting the driving transistor to the data driver
- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/3266: Details of drivers for scan electrodes
- G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
- H10D 86/421: {having a particular composition, shape or crystalline structure of the active layer}
- H10D 86/441: {Interconnections, e.g. scanning lines}
- H10D 86/60: wherein the TFTs are in active matrices
- G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing
- G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
- 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)
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES

## Abstract

An organic light emitting diode (“OLED”) display includes a semiconductor layer on a substrate, first and second signal lines on the semiconductor layer, a shield layer on the first and second signal lines, a data line on the shield layer, and an OLED on the data line, where the transistor includes a driving transistor, a second transistor connected to the first signal line and the data line, and a third transistor including a gate electrode connected to the first signal line, a third electrode connected to a second electrode of the driving transistor, and a fourth electrode connected to a gate electrode of the driving transistor, the shield layer includes an overlapped portion overlapping at least a part of the connection portion and non-overlaps the second transistor, and the shield layer is separated from the first and second signal lines with a gap therebetween in a plan view.

## Claims

### Claim 1

An organic light emitting diode display comprising:
a substrate;
a first pixel and a second pixel disposed on the substrate; and
a plurality of first shield patterns disposed on the substrate,
wherein each of the first pixel and the second pixel comprises:
a driving transistor including a first gate electrode, a first channel region disposed in a semiconductor layer, a first electrode electrically connected to a driving voltage line transmitting a driving voltage, and a second electrode,
a second transistor including a second gate electrode, a second channel region disposed in the semiconductor layer, a first electrode, and a second electrode connected to the first electrode of the driving transistor,
a third transistor including a third gate electrode, a third channel region disposed in the semiconductor layer, a first electrode connected to the second electrode of the driving transistor, and a second electrode connected to the first gate electrode of the driving transistor,
a fourth transistor including a fourth gate electrode, a fourth channel region disposed in the semiconductor layer, a first electrode connected to the second electrode of the third transistor, and a second electrode connected to an initialization voltage line,
a first contact portion connects the first electrode of the second transistor to a corresponding data line, and
an organic light emitting diode including an anode electrically connected to the second electrode of the driving transistor,
wherein the third transistor involved in each of the first pixel and the second pixel respectively includes a first sub transistor and a second sub transistor connected in series to each other at a first semiconductor connection portion disposed in the semiconductor layer,
wherein the third transistor and the fourth transistor involved in each of the first pixel and the second pixel are respectively connected to each other at a second semiconductor connection portion disposed between the third channel region and the fourth channel region in the semiconductor layer,
wherein the first electrode of the second transistor is disposed in the semiconductor layer and disposed between the second channel region and the first contact portion in each of the first pixel and the second pixel,
wherein each of the first semiconductor connection portion and the second semiconductor connection portion involved in each of the first pixel and the second pixel overlaps at least a portion of a corresponding one of the plurality of first shield patterns,
wherein the first electrode of the second transistor involved in each of the first pixel and the second pixel does not overlap any one of the plurality of first shield patterns, and
wherein the plurality of first shield patterns receive the driving voltage.

### Claim 2 (depends on 1)

The organic light emitting diode display of claim 1, further comprises:
a first conductive layer disposed on the semiconductor layer,
a second conductive layer disposed on the first conductive layer, and
a first data layer disposed on the second conductive layer,
wherein the first conductive layer includes the first gate electrode and the second gate electrode.

### Claim 3 (depends on 2)

The organic light emitting diode display of claim 2, wherein the second conductive layer includes the plurality of first shield patterns.

### Claim 4 (depends on 3)

The organic light emitting diode display of claim 3, wherein:
the first data layer includes a plurality of voltage lines connected to adjacent pixels, and
each of the plurality of first shield patterns overlaps a corresponding one of the plurality of voltage lines.

### Claim 5 (depends on 2)

The organic light emitting diode display of claim 2, further comprising:
a first signal line connected to the second gate electrode, and
a second signal line connected to the third gate electrode,
wherein the first conductive layer further includes the first signal line and the second signal line.

### Claim 6 (depends on 5)

The organic light emitting diode display of claim 5, wherein the first signal line is a scan line which transmits a scan signal.

### Claim 7 (depends on 6)

The organic light emitting diode display of claim 6, wherein the second signal line is a previous scan line which transmits a previous scan signal.

### Claim 8 (depends on 1)

The organic light emitting diode display of claim 1, wherein:
the second gate electrode of the second transistor is connected to a scan line extending in a first direction, and
the plurality of first shield patterns respectively include an extending portion and a first portion,
the extending portion extends in a substantially same direction as the first direction,
the first semiconductor connection portion in each of the first pixel and the second pixel respectively overlaps the first portion of a corresponding one of the plurality of first shield patterns, and
the first portion is extended from the extending portion.

### Claim 9 (depends on 8)

The organic light emitting diode display of claim 8, wherein the first pixel and the second pixel are disposed adjacent in the first direction.

### Claim 10 (depends on 8)

The organic light emitting diode display of claim 8, wherein:
the second semiconductor connection portion is electrically connected to the first gate electrode of the driving transistor at a second contact portion,
each of the plurality of first shield patterns further includes a second portion, respectively, and
the second portion is disposed between the second contact portion and the first contact portion in each of the first pixel and the second pixel in a plan view.

### Claim 11 (depends on 10)

The organic light emitting diode display of claim 10, wherein the second portion is disposed at an opposite end to the first portion with respect to the extending portion.

### Claim 12 (depends on 11)

The organic light emitting diode display of claim 11, wherein the first portion and the second portion are protruded from a corresponding end of the extending portion.

### Claim 13 (depends on 12)

The organic light emitting diode display of claim 12, wherein the first portion and the second portion are protruded in a same direction from the extending portion.

### Claim 14 (depends on 10)

The organic light emitting diode display of claim 10, wherein the second portion receives the driving voltage from the driving voltage line.

### Claim 15 (depends on 14)

The organic light emitting diode display of claim 14, wherein the second portion overlaps at least a part of the fourth transistor.

### Claim 16 (depends on 10)

The organic light emitting diode display of claim 10, wherein the second contact portion is an opening connecting the second electrode of the third transistor and a first data connecting member, and
the first data connecting member is electrically connected to the first gate electrode of the driving transistor.

### Claim 17 (depends on 1)

The organic light emitting diode display of claim 1, wherein the first semiconductor connection portion is disposed as a bent pattern of the semiconductor layer.

### Claim 18 (depends on 1)

The organic light emitting diode display of claim 1, wherein the driving voltage line is disposed in a same layer as the data line.

### Claim 19 (depends on 1)

The organic light emitting diode display of claim 1, further comprising:
an auxiliary connecting member disposed in a same layer as the data line, and electrically connected to the anode of the organic light emitting diode.

### Claim 20 (depends on 1)

The organic light emitting diode display of claim 1, wherein the driving voltage has a constant voltage level.

### Claim 21 (depends on 1)

The organic light emitting diode display of claim 1, wherein the first contact portion is an opening connecting the corresponding data line and the first electrode of the second transistor disposed in the semiconductor layer.

### Claim 22

An electronic device for displaying image comprising:
a substrate;
a first pixel and a second pixel disposed on the substrate; and
a plurality of first shield patterns disposed on the substrate,
wherein each of the first pixel and the second pixel comprises:
a driving transistor including a first gate electrode, a first channel region disposed in a semiconductor layer, a first electrode electrically connected to a driving voltage line transmitting a driving voltage, and a second electrode,
a second transistor including a second gate electrode, a second channel region disposed in the semiconductor layer, a first electrode, and a second electrode connected to the first electrode of the driving transistor,
a third transistor including a third gate electrode, a third channel region disposed in the semiconductor layer, a first electrode connected to the second electrode of the driving transistor, and a second electrode connected to the first gate electrode of the driving transistor,
a fourth transistor including a fourth gate electrode, a fourth channel region disposed in the semiconductor layer, a first electrode connected to the second electrode of the third transistor, and a second electrode connected to an initialization voltage line,
a first contact portion connects the first electrode of the second transistor to a corresponding data line, and
an organic light emitting diode including an anode electrically connected to the second electrode of the driving transistor,
wherein the third transistor involved in each of the first pixel and the second pixel respectively includes a first sub transistor and a second sub transistor connected in series to each other at a first semiconductor connection portion disposed in the semiconductor layer,
wherein the third transistor and the fourth transistor involved in each of the first pixel and the second pixel are respectively connected to each other at a second semiconductor connection portion disposed between the third channel region and the fourth channel region in the semiconductor layer,
wherein the first electrode of the second transistor is disposed in the semiconductor layer and disposed between the second channel region and the first contact portion in each of the first pixel and the second pixel,
wherein each of the first semiconductor connection portion and the second semiconductor connection portion involved in each of the first pixel and the second pixel overlaps at least a portion of a corresponding one of the plurality of first shield patterns,
wherein the first electrode of the second transistor involved in each of the first pixel and the second pixel does not overlap any one of the plurality of first shield patterns, and
wherein the plurality of first shield patterns receive the driving voltage.

### Claim 23 (depends on 22)

The electronic device for displaying image of claim 22, further comprises:
a first conductive layer disposed on the semiconductor layer,
a second conductive layer disposed on the first conductive layer, and
a first data layer disposed on the second conductive layer,
wherein the first conductive layer includes the first gate electrode and the second gate electrode.

### Claim 24 (depends on 23)

The electronic device for displaying image of claim 23, wherein the second conductive layer includes the plurality of first shield patterns.

### Claim 25 (depends on 24)

The electronic device for displaying image of claim 24, wherein:
the first data layer includes a plurality of voltage lines connected to adjacent pixels, and
each of the plurality of first shield patterns overlaps a corresponding one of the plurality of voltage lines.

### Claim 26 (depends on 22)

The electronic device for displaying image of claim 22, wherein:
the second gate electrode of the second transistor is connected to a scan line extending in a first direction, and
the plurality of first shield patterns respectively include an extending portion and a first portion,
the extending portion extends in a substantially same direction as the first direction,
the first semiconductor connection portion in each of the first pixel and the second pixel respectively overlaps the first portion of a corresponding one of the plurality of first shield patterns, and
the first portion is extended from the extending portion.

### Claim 27 (depends on 26)

The electronic device for displaying image of claim 26, wherein the first pixel and the second pixel are disposed adjacent in the first direction.

### Claim 28 (depends on 26)

The electronic device for displaying image of claim 26, wherein:
the second semiconductor connection portion is electrically connected to the first gate electrode of the driving transistor at a second contact portion,
each of the plurality of first shield patterns further includes a second portion, respectively, and
the second portion is disposed between the second contact portion and the first contact portion in each of the first pixel and the second pixel in a plan view.

### Claim 29 (depends on 28)

The electronic device for displaying image of claim 28, wherein the second portion is disposed at an opposite end to the first portion with respect to the extending portion.

### Claim 30 (depends on 29)

The electronic device for displaying image of claim 29, wherein the first portion and the second portion are protruded from a corresponding end of the extending portion.

### Claim 31 (depends on 30)

The electronic device for displaying image of claim 30, wherein the first portion and the second portion are protruded in a same direction from the extending portion.

### Claim 32 (depends on 28)

The electronic device for displaying image of claim 28, wherein the second portion receives the driving voltage from the driving voltage line.

### Claim 33 (depends on 32)

The electronic device for displaying image of claim 32, wherein the second portion overlaps at least a part of the fourth transistor.

### Claim 34 (depends on 33)

The electronic device for displaying image of claim 33, further comprising:
a first signal line connected to the second gate electrode, and
a second signal line connected to the third gate electrode,
wherein the first conductive layer further includes the first signal line and the second signal line.

### Claim 35 (depends on 34)

The electronic device for displaying image of claim 34, wherein the first signal line is a scan line which transmits a scan signal.

### Claim 36 (depends on 35)

The electronic device for displaying image of claim 35, wherein the second signal line is a previous scan line which transmits a previous scan signal.

### Claim 37 (depends on 28)

The electronic device for displaying image of claim 28, wherein the second contact portion is an opening connecting the second electrode of the third transistor and a first data connecting member, and
the first data connecting member is electrically connected to the first gate electrode of the driving transistor.

### Claim 38 (depends on 22)

The electronic device for displaying image of claim 22, wherein the first semiconductor connection portion is disposed as a bent pattern of the semiconductor layer.

### Claim 39 (depends on 22)

The electronic device for displaying image of claim 22, wherein the driving voltage line is disposed in a same layer as the data line.

### Claim 40 (depends on 22)

The electronic device for displaying image of claim 22, further comprising:
an auxiliary connecting member disposed in a same layer as the data line, and electrically connected to the anode of the organic light emitting diode.

### Claim 41 (depends on 22)

The electronic device for displaying image of claim 22, wherein the driving voltage has a constant voltage level.

### Claim 42 (depends on 22)

The electronic device for displaying image of claim 22, wherein the first contact portion is an opening connecting the corresponding data line and the first electrode of the second transistor disposed in the semiconductor layer.