# US RE50,012 E1 · Organic light-emitting diode display

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- Number: US RE50,012 E1
- Document ID: USRE50012E1
- Status: Granted
- Kind: E1
- Application number: 17/713,314
- Filed: 2022-04-05
- Granted: 2024-06-11
- Earliest claimed: 2015-04-28
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Hee Rim Song; Mu Kyung Jeon; Chong Chul Chai
- Web page: https://patentgrep.com/patent/USRE50012E1

## CPC

- H10K 59/126: Shielding, e.g. light-blocking means over the TFTs
- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- H10K 50/813: characterised by their shape
- H10K 50/818: Reflective anodes, e.g. ITO combined with thick metallic layers
- H10K 59/1213: {the pixel elements being TFTs}
- 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 2320/0238: Improving the black level
- H10K 59/1216: {the pixel elements being capacitors}
- H10K 59/35: comprising red-green-blue [RGB] subpixels
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- 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)

## Abstract

An organic light-emitting diode display is disclosed. In one aspect, the display includes a plurality of pixels formed in a plurality of intersection areas of a plurality of data lines and a plurality of scan lines. Each of the pixels includes a storage capacitor configured to store a data voltage, at least one target transistor having one end electrically connected to a current path of the storage capacitor, an organic light emitting layer, and a first electrode of an OLED formed over the organic light emitting layer. The first electrode includes a first electrode extension configured to block at least a portion of the target transistor from light.

## Claims

### Claim 1

An organic light-emitting diode (OLED) display, comprising:
a plurality of pixels formed in a plurality of intersection areas of a plurality of data lines and a plurality of scan lines,
wherein each of the pixels includes:
a storage capacitor configured to store a data voltage;
at least one target transistor having one end electrically connected to a current path of the storage capacitor;
an organic light emitting layer; and
a first electrode of an OLED formed below the organic light emitting layer, and
wherein the first electrode includes a first electrode extension configured to block at least a portion of the at least one target transistor from light including at least one of external light and light leakage current from the storage capacitor, wherein each of the pixels further includes:
a driving transistor configured to adjust an amount of current flowing in the OLED; and
a compensation transistor having a first end electrically connected to a gate electrode of the driving transistor and a first end of the storage capacitor, and a second end electrically connected to a first end of the driving transistor, wherein the at least one target transistor includes the compensation transistor, wherein the first electrode extension of a first one of the pixels in a first row of the OLED display overlaps the compensation transistor of a second other one of the pixels of the OLED display in a second row adjacent the first row to block the compensation transistor of the second pixel from light, and
wherein no portion of the compensation transistor overlaps the organic light emitting layer of the OLED display.

### Claim 2 (depends on 1)

The OLED display of claim 1, wherein each of the pixels further includes an initialization transistor having a first end electrically connected to a first end of the storage capacitor and a second end electrically connected to an initialization voltage line, and wherein the at least one target transistor includes the initialization transistor.

### Claim 3 (depends on 2)

The OLED display of claim 2, wherein the first electrode extension further overlaps the initialization transistor of the OLED display.

### Claim 4 (depends on 2)

The OLED display of claim 2, wherein at least one of the initialization transistor and the compensation transistor includes a plurality of gate electrodes.

### Claim 5 (depends on 2)

The OLED display of claim 2, wherein each of the pixels corresponds to one among a first color pixel, a second color pixel, and a third color pixel, wherein the first electrode extensions of the first and second color pixels are further configured to respectively block the initialization and compensation transistors included in the first and second color pixels from the light by as much as a first area, wherein the first electrode extension of the third color pixel is further configured to block the initialization and compensation transistors included in the third color pixel from the light by as much as a second area, and wherein the first area is larger than the second area.

### Claim 6 (depends on 5)

The OLED display of claim 5, wherein the first electrode extensions of the first and second color pixels are further configured to completely block the initialization and compensation transistor included in the first and second color pixels from the light, wherein the first electrode extension of the third color pixel is further configured to completely block the initialization transistor included in the third color pixel from the light.

### Claim 7 (depends on 6)

The OLED display of claim 6, wherein the OLED display comprises a mono color display device.

### Claim 8 (depends on 5)

The OLED display of claim 5, wherein the first electrode extensions of the first and second color pixels are further configured to completely block the initialization and compensation transistors included in the first and second color pixels from the light, and wherein the first electrode extension of the third color pixel is further configured to not block the initialization and compensation transistors included in the third color pixel from the light.

### Claim 9 (depends on 8)

The OLED display of claim 8, wherein the first, second and third colors respectively include red, green, and blue.

### Claim 10 (depends on 1)

The OLED display of claim 1, wherein a first organic light emitting layer of one of the pixels is adjacent to a second organic emitting layer, and wherein the first and second organic light emitting layers have a minimum interval therebetween formed by a depositing mask.

### Claim 11 (depends on 10)

The OLED display of claim 10, wherein the first electrode is formed below the organic light emitting layer and includes:
the first electrode extension; and
a contact configured to be applied with an electrical signal.

### Claim 12 (depends on 1)

The OLED display of claim 1, wherein the OLED display is configured to be driven in a low power consumption mode at a first frequency below a predetermined frequency, and wherein a time in which the storage capacitor holds a recoded voltage in the low power consumption mode is greater than a time in which the storage capacitor holds the recorded voltage upon a normal driving.

### Claim 13

An organic light-emitting diode (OLED) display, comprising:
a storage capacitor having a first end electrically connected to a power source and configured to store a data voltage;
at least one target transistor having a first end electrically connected to a second end of the storage capacitor;
an OLED configured to receive the data voltage from the storage capacitor and including a first electrode; and
a driving transistor configured to adjust an amount of current flowing in the OLED;
wherein the OLED includes an organic light emitting layer, and
wherein the first electrode includes a first electrode extension formed over a portion of the at least one target transistor and configured to block at least a portion of the at least one target transistor from light including at least one of external light and light leakage current from the storage capacitor,
wherein the at least one target transistor includes at least one compensation transistor including a compensation transistor having a first end electrically connected to a gate electrode of the driving transistor and a first the second end of the storage capacitor, and a second end electrically connected to a first end of the driving transistor,
wherein the at least one target transistor includes the at least one compensation transistor,
wherein the first electrode extension of a first one of the pixels in a first row of the OLED display overlaps the compensation transistor a second other one of the pixels in a second row of the OLED display adjacent the first row to block the compensation transistor of the second pixel from light, and
wherein no portion of the compensation transistor overlaps the organic light emitting layer of the OLED display.

### Claim 14 (depends on 13)

The OLED display of claim 13, wherein the at least one target transistor further includes:
at least one initialization transistor including a drain electrode electrically connected to the second end of the storage capacitor.

### Claim 15 (depends on 14)

The OLED display of claim 14, further comprising a plurality of pixels each including the at least one target transistor.

### Claim 16 (depends on 15)

The OLED display of claim 15, wherein the at least one compensation transistor further includes second and third compensation transistors overlapping the first electrode extension.

### Claim 17 (depends on 16)

The OLED display of claim 16, wherein the at least one initialization transistor includes first to third initialization transistors overlapping the first electrode.

### Claim 18 (depends on 13)

The OLED display of claim 13, wherein the first electrode has four sides, and wherein the first electrode extension is formed adjacent to three of the four sides of the first electrode.

### Claim 19 (depends on 13)

The OLED display of claim 13, wherein the light includes external light or leakage light from a plurality of pixels other than a selected pixel including the OLED.

### Claim 20

An organic light-emitting diode (OLED) display, comprising:
a plurality of pixels, wherein each of the pixels are connected to a corresponding data line of a plurality of data lines and a corresponding scan line of a plurality of scan lines,
wherein each of the pixels includes:
a storage capacitor configured to store a data voltage;
a compensation transistor having one end electrically connected to a current path of the storage capacitor;
an organic light emitting layer;
a first electrode of an OLED formed below the organic light emitting layer; and
a driving transistor configured to adjust an amount of current flowing in the OLED, and
wherein an electrode extension of the first electrode blocks at least a portion of the compensation transistor from light to prevent an occurrence of a light leakage current on a current leakage path of the storage capacitor,
wherein the compensation transistor has a first end electrically connected to a gate electrode of the driving transistor and a first end of the storage capacitor, and a second end electrically connected to a first end of the driving transistor, wherein the electrode extension of the first electrode of a first one of the pixels overlaps the compensation transistor of a second other one of the pixels adjacent the first pixel, and
wherein no portion of the compensation transistor overlaps the organic light emitting layer of the OLED display.

### Claim 21 (depends on 20)

The OLED display of claim 20, wherein each of the pixels further includes an initialization transistor having a first end electrically connected to a first end of the storage capacitor and a second end electrically connected to an initialization voltage line.

### Claim 22 (depends on 21)

The OLED display of claim 21, wherein the electrode extension of the first electrode further overlaps the initialization transistor of the second pixel.

### Claim 23 (depends on 21)

The OLED display of claim 21, wherein at least one of the initialization transistor and the compensation transistor includes a plurality of gate electrodes.

### Claim 24 (depends on 21)

The OLED display of claim 21, wherein a first organic light emitting layer of one of the pixels is adjacent to a second organic emitting layer, and wherein the first and second organic light emitting layers have a minimum interval therebetween formed by a depositing mask.

### Claim 25 (depends on 24)

The OLED display of claim 24, wherein the first electrode is formed below the organic light emitting layer and includes a contact configured to be applied with an electrical signal.

### Claim 26 (depends on 20)

The OLED display of claim 20, wherein each of the pixels corresponds to one among a first color pixel, a second color pixel, and a third color pixel, wherein the electrode extension of the first electrode of the first and second color pixels are further configured to respectively block the compensation transistor included in the first and second color pixels from the light by as much as a first area, wherein the electrode extension of the first electrode of the third color pixel is further configured to block the compensation transistor included in the third color pixel from the light by as much as a second area, and wherein the first area is larger than the second area.

### Claim 27 (depends on 26)

The OLED display of claim 26, wherein the electrode extension of the first electrode of the first and second color pixels are further configured to completely block the compensation transistor included in the first and second color pixels from the light, wherein the electrode extension of the first electrode of the third color pixel is further configured to completely block the initialization transistor included in the third color pixel from the light.

### Claim 28 (depends on 27)

The OLED display of claim 27, wherein the OLED display comprises a mono color display device.

### Claim 29 (depends on 26)

The OLED display of claim 26, wherein the electrode extension of the first electrode of the first and second color pixels are further configured to completely block the compensation transistor included in the first and second color pixels from the light, and wherein the electrode extension of the first electrode of the third color pixel is further configured to not block the compensation transistor included in the third color pixel from the light.

### Claim 30 (depends on 29)

The OLED display of claim 29, wherein the first, second and third colors respectively include red, green, and blue.

### Claim 31 (depends on 21)

The OLED display of claim 21, wherein the OLED display is configured to be driven in a low power consumption mode at a first frequency below a predetermined frequency, and wherein a time in which the storage capacitor holds a recoded voltage in the low power consumption mode is greater than a time in which the storage capacitor holds the recorded voltage upon a normal driving.

### Claim 32

An organic light-emitting diode (OLED) display, comprising:
a storage capacitor having a first end electrically connected to a power source and configured to store a data voltage;
at least one compensation transistor having a first end electrically connected to a second end of the storage capacitor;
an OLED configured to receive the data voltage from the storage capacitor and including a first electrode; and
a driving transistor configured to adjust an amount of current flowing in the OLED;
wherein the OLED includes an organic light emitting layer, and
wherein an electrode extension of the first electrode is formed over a portion of the at least one compensation transistor and configured to block at least a portion of the at least one compensation transistor from light wherein an electrode extension of the first electrode blocks at least a portion of the compensation transistor from light to prevent an occurrence of a light leakage current on a current leakage path of the storage capacitor,
wherein the at least one compensation transistor includes a compensation transistor has a first end electrically connected to a gate electrode of the driving transistor and second end of the storage capacitor, and a second end electrically connected to a first end of the driving transistor,
wherein the electrode extension of the first electrode of a first one of the pixels overlaps the compensation transistor a second other one of the pixels adjacent the first pixel to block the compensation transistor of the second pixel from light, and
wherein no portion of the compensation transistor overlaps the organic light emitting layer of the OLED display.

### Claim 33 (depends on 32)

The OLED display of claim 32, further comprising:
at least one initialization transistor including a drain electrode electrically connected to the second end of the storage capacitor.

### Claim 34 (depends on 32)

The OLED display of claim 32, wherein the at least one compensation transistor further includes second and third compensation transistors overlapping the electrode extension of the first electrode.

### Claim 35 (depends on 33)

The OLED display of claim 33, wherein the at least one initialization transistor includes first to third initialization transistors overlapping the electrode extension of the first electrode.

### Claim 36 (depends on 32)

The OLED display of claim 32, wherein the first electrode has four sides, and wherein the electrode extension is formed adjacent to three of the four sides of the first electrode.

### Claim 37

An organic light-emitting diode (OLED) display, comprising:
a plurality of pixels, wherein each of the pixels are connected to a corresponding data line of a plurality of data lines and a corresponding scan line of a plurality of scan lines,
wherein each of the pixels includes:
a storage capacitor configured to store a data voltage;
an initialization transistor having a first end electrically connected to a first end of the storage capacitor and a second end electrically connected to an initialization voltage line;
an organic light emitting layer;
a first electrode of an OLED formed below the organic light emitting layer;
a driving transistor configured to adjust an amount of current flowing in the OLED; and
a compensation transistor having a first end electrically connected to a gate electrode of the driving transistor and a first end of the storage capacitor, and a second end electrically connected to a first end of the driving transistor, and
wherein an electrode extension of the first electrode blocks at least a portion of the initialization transistor from light wherein an electrode extension of the first electrode blocks at least a portion of the compensation transistor from light to prevent an occurrence of a light leakage current on a current leakage path of the storage capacitor,
wherein the electrode extension of the first electrode of a first one of the pixels overlaps the initialization transistor and the compensation transistor of a second other one of the pixels adjacent the first pixel, and
wherein no portion of one of a plurality of transistors of the initialization transistor overlaps the organic light emitting layer of the OLED display.

### Claim 38 (depends on 37)

The OLED display of claim 37, wherein each of the pixels further includes a compensation transistor having a first end electrically connected to a gate electrode of the driving transistor and a first end of the storage capacitor, and a second end electrically connected to a first end of the driving transistor.

### Claim 39 (depends on 38)

The OLED display of claim 38, wherein the electrode extension of the first electrode further overlaps the compensation transistor of the second pixel.

### Claim 40 (depends on 38)

The OLED display of claim 38, wherein at least one of the initialization transistor and the compensation transistor includes a plurality of gate electrodes.

### Claim 41 (depends on 38)

The OLED display of claim 38, wherein a first organic light emitting layer of one of the pixels is adjacent to a second organic emitting layer, and wherein the first and second organic light emitting layers have a minimum interval therebetween formed by a depositing mask.

### Claim 42 (depends on 41)

The OLED display of claim 41, wherein the first electrode is formed below the organic light emitting layer and includes a contact configured to be applied with an electrical signal.

### Claim 43 (depends on 37)

The OLED display of claim 37, wherein the OLED display is configured to be driven in a low power consumption mode at a first frequency below a predetermined frequency, and wherein a time in which the storage capacitor holds a recoded voltage in the low power consumption mode is greater than a time in which the storage capacitor holds the recorded voltage upon a normal driving.

### Claim 44 (depends on 37)

The OLED display of claim 37, wherein each of the pixels corresponds to one among a first color pixel, a second color pixel, and a third color pixel, wherein the electrode extension of the first electrode of the first and second color pixels are further configured to respectively block the initialization transistor included in the first and second color pixels from the light by as much as a first area, wherein the electrode extension of the first electrode of the third color pixel is further configured to block the initialization transistor included in the third color pixel from the light by as much as a second area, and wherein the first area is larger than the second area.

### Claim 45 (depends on 44)

The OLED display of claim 44, wherein the electrode extension of the first electrode of the first and second color pixels are further configured to completely block the compensation transistor included in the first and second color pixels from the light, wherein the electrode extension of the first electrode of the third color pixel is further configured to completely block the initialization transistor included in the third color pixel from the light.

### Claim 46 (depends on 45)

The OLED display of claim 45, wherein the OLED display comprises a mono color display device.

### Claim 47 (depends on 44)

The OLED display of claim 44, wherein the electrode extension of the first electrode of the first and second color pixels are further configured to completely block the compensation transistor included in the first and second color pixels from the light, and wherein the electrode extension of the first electrode of the third color pixel is further configured to not block the compensation transistor included in the third color pixel from the light.

### Claim 48 (depends on 47)

The OLED display of claim 47, wherein the first, second and third colors respectively include red, green, and blue.