# US 11,908,418 B2 · Display panel, display device including the same, and method for operating the same

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- Number: US 11,908,418 B2
- Document ID: US11908418B2
- Status: Granted
- Kind: B2
- Application number: 17/836,757
- Filed: 2022-06-09
- Published: 2023-01-26
- Granted: 2024-02-20
- Earliest claimed: 2021-07-20
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Minjic Lee; Yeseul Han; Jeongok Jo; Kwanghyun Choi
- Web page: https://patentgrep.com/patent/US11908418B2

## CPC

- 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
- G09G 2300/0426: Layout of electrodes and connections
- 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 2310/0297: Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
- G09G 2310/066: Waveforms comprising a gently increasing or decreasing portion, e.g. ramp
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
- G09G 2340/0435: Change or adaptation of the frame rate of the video stream
- G09G 2370/14: Use of low voltage differential signaling [LVDS] for display data communication
- 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

A the display panel includes a plurality of sub-pixels arranged in rows and columns; one scan line disposed in each of the rows of the plurality of sub-pixels; two data lines are disposed in each of the columns of the plurality of sub-pixels; a first multiplexer configured to select a data line at one side among the two data lines disposed in each column; and a second multiplexer configured to select a data line at another side among the two data lines disposed in each column that can be operated at a high speed using a 2D1G structure as well as at a low speed in an interlace scheme, thus securing 2H sensing time and removing flickering during switching between operations of pixels.

## Claims

### Claim 1

A display panel comprising:
a plurality of sub-pixels arranged in rows and columns;
one scan line disposed in each of the rows of the plurality of sub-pixels;
two data lines disposed in each of the columns of the plurality of sub-pixels;
a first multiplexer configured to select a data line at one side among the two data lines disposed in each column; and
a second multiplexer configured to select a data line at another side among the two data lines disposed in each column,
wherein the scan signal is applied to the plurality of scan lines such that writing and sensing operations of each of pixels of a first row, and an initialization operation of a light-emitting element and a gate electrode of a driving switch of each of pixels of a fifth row are simultaneously executed.

### Claim 2 (depends on 1)

The display panel of claim 1, wherein the display panel further comprises:
each of first and second scan switches for switching the one scan line disposed in each row connected to the data line at the one side disposed in each column; and
each of third and fourth scan switches for switching the one scan line disposed in each row connected to the data line at the another side disposed in each column.

### Claim 3 (depends on 2)

The display panel of claim 2, wherein the first and second scan switches are respectively disposed in two sub-pixels arranged consecutively in a column direction along the data line at the one side among the plurality of sub-pixels,
wherein the third and fourth scan switches are respectively disposed in two sub-pixels arranged consecutively in the column direction along the data line at the another side among the plurality of sub-pixels.

### Claim 4 (depends on 3)

The display panel of claim 3, wherein pairs of the first and second scan switches and pairs of the third and fourth scan switches are alternatively arranged with each other in the column direction and in a zig-zag manner.

### Claim 5 (depends on 1)

The display panel of claim 1, wherein the first multiplexer includes a first multiplexer switch configured such that a first electrode is connected to the data line at the one side, a gate electrode is connected to a first multiplexer line for applying a first selection signal, and a second electrode is connected to a first power.

### Claim 6 (depends on 5)

The display panel of claim 5, wherein the first multiplexer switch is turned on based on the first selection signal applied to the gate electrode through the first multiplexer line, such that the first power applied through the second electrode is applied to the data line at the one side through the first electrode.

### Claim 7 (depends on 1)

The display panel of claim 1, wherein the second multiplexer includes a second multiplexer switch having a first electrode connected to the data line of the another side, a gate electrode connected to a second multiplexer line for applying a second selection signal, and a second electrode connected to a first power.

### Claim 8 (depends on 7)

The display panel of claim 7, wherein the second multiplexer switch is turned on based on the second selection signal applied to the gate electrode through the second multiplexer line, such that the first power applied through the second electrode is applied to the data line at the another side through the first electrode.

### Claim 9

A display device comprising:
a display panel including:
a plurality of sub-pixels arranged in rows and columns;
a plurality of scan lines arranged such that one scan line is disposed in each of the rows of the plurality of sub-pixels;
a plurality of data lines arranged such that two data lines are disposed in each of the columns of the plurality of sub-pixels;
a first multiplexer configured to select a data line at one side among the two data lines disposed in each column;
a second multiplexer configured to select a data line at another side among the two data lines disposed in each column;
each of first and second scan switches for switching the scan line disposed in each row connected to the data line at the one side disposed in each column; and
each of third and fourth scan switches for switching the scan line disposed in each row connected to the data line at the another side disposed in each column;
a scan driver for applying a scan signal to a plurality of gate lines;
a data driver for applying a data signal to the plurality of data lines;
a power supply for providing a high-potential voltage, a low-potential voltage, and an initialization voltage to each of the plurality of sub-pixels; and
a timing controller for controlling the scan driver and the data driver,
wherein pairs of the first and second scan switches and pairs of the third and fourth scan switches are alternatively arranged with each other in the column direction of the plurality of sub-pixels and in a zig-zag manner, and
wherein the scan signal is applied to the plurality of scan lines such that writing and sensing operations of each of pixels of a first row, and an initialization operation of a light-emitting element and a gate electrode of a driving switch of each of pixels of a fifth row are simultaneously executed.

### Claim 10 (depends on 9)

The display device of claim 9, wherein the display panel operates in a progressive scheme at each of 120 Hz and 60 Hz, and operates in an interlace scheme at 30 Hz.

### Claim 11 (depends on 10)

The display device of claim 10, wherein, when the display panel operates in the progressive scheme, the data signal is applied to the plurality of sub-pixels on a 4 rows basis such that the data signal is applied to pixels in a first row, then, the data signal is applied to pixels in a third row, then, the data signal is applied to pixels in a second row, and then the data signal is applied to pixels in a fourth row.

### Claim 12 (depends on 10)

The display device of claim 10, wherein, when the display panel operates in the interlace scheme, the plurality of sub-pixels are grouped into an odd-numbered frame group and an even-numbered frame group, and a data voltage is applied to sub-pixels corresponding to the odd-numbered frame group for a first half frame, and a data voltage is applied to sub-pixels corresponding to the even-numbered frame group for a second half frame.

### Claim 13 (depends on 12)

The display device of claim 12, wherein, when the display panel operates at the interlace scheme, a scan signal applied for two horizontal periods of the sub-pixel corresponding to the odd-numbered frame group overlap each other a scan signal applied for two horizontal periods of the sub-pixel corresponding to the even-numbered frame group by one horizontal period.

### Claim 14

A method for operating a display device having a display panel that includes one scan line disposed in each of rows of a plurality of sub-pixels, and two data lines respectively disposed at one side and another side and in each of columns of the plurality of sub-pixels, the method comprises:
(a) for a first half frame, turning a first multiplexer switch on to apply a data voltage to a sub-pixel corresponding to an odd-numbered scan line through the data line at one side; and
(b) for a second half frame, turning a second multiplexer switch on to a data voltage to a sub-pixel corresponding to an even-numbered scan line through the data line at another side,
wherein the scan signal is applied to the plurality of scan lines such that writing and sensing operations of each of pixels of a first row, and an initialization operation of a light-emitting element and a gate electrode of a driving switch of each of pixels of a fifth row are simultaneously executed.

### Claim 15 (depends on 14)

The method of claim 14, wherein (a) includes:
(a-1) for one horizontal period, turning on the first multiplexer switch connected to the data line at one side, based on a first multiplexer signal;
(a-2) applying the data voltage to the data line at one side through the turned-on first multiplexer switch;
(a-3) applying an (n−1)-th scan signal to a first scan line disposed in a sub-pixel corresponding to an odd-numbered frame and connected to the data line at one side for two horizontal periods; and
(a-4) turning on a first scan switch connected to and disposed between the data line at one side and the first scan line, based on the (n−1)-th scan signal and for two horizontal periods; and
(a-5) applying the data voltage from the data line at one side to a sub-pixel disposed in an odd-numbered first row through the turned-on first scan switch.

### Claim 16 (depends on 15)

The method of claim 15, wherein (b) includes:
(b-1) for a next one horizontal period, turning on a second multiplexer switch connected to the data line at the another side, based on a second multiplexer signal;
(b-2) applying the data voltage to the data line at the another side through the turned-on second multiplexer switch;
(b-3) applying an n-th scan signal to a third scan line disposed in a sub-pixel corresponding to an even-numbered frame and connected to the data line at the another side for two horizontal periods;
(b-4) turning on a third scan switch connected to and disposed between the data line at the another side and the third scan line, based on the n-th scan signal and for two horizontal periods; and
(b-5) applying the data voltage from the data line at the another side to a sub-pixel disposed in an odd-numbered third row through the turned-on third scan switch.

### Claim 17 (depends on 16)

The method of claim 16, wherein the (n−1)-th scan signal overlaps with the n-th scan signal for one horizontal period.

### Claim 18 (depends on 16)

The method of claim 16, wherein a second scan switch connected to and disposed between the data line at the one side and a second scan line and a fourth scan switch connected to and disposed between the data line at the another side and a fourth scan line are in a turned off state while the first and third scan switches are in a turned on state.

### Claim 19 (depends on 14)

The method of claim 14, wherein each of the sub-pixel corresponding to the odd-numbered frame and the sub-pixel corresponding to the even-numbered frame is disposed in an odd-numbered row of rows of the plurality of sub-pixels.

### Claim 20

A method for operating a display device having a display panel that includes one scan line disposed in each of rows of a plurality of sub-pixels, and two data lines respectively disposed at one side and another side and in each of columns of the plurality of sub-pixels, the method comprises:
(a) turning on a first scan switch connected to the data line at the one side so as to apply a data voltage to a sub-pixel of a first scan line;
(b) turning on a third scan switch connected to the data line at the another side so as to apply a data voltage to a sub-pixel of a third scan line;
(c) turning on a second scan switch connected to the data line at the one side so as to apply a data voltage to a sub-pixel of a second scan line; and
(d) turning on a fourth scan switch connected to the data line at the another side so as to apply a data voltage to a sub-pixel of a fourth scan line,
wherein the scan signal is applied to the plurality of scan lines such that writing and sensing operations of each of pixels of a first row, and an initialization operation of a light-emitting element and a gate electrode of a driving switch of each of pixels of a fifth row are simultaneously executed.

### Claim 21 (depends on 20)

The method of claim 20, wherein the (a) includes:
(a-1) for one horizontal period, turning on a first multiplexer switch connected to the data line at the one side, based on a first multiplexer signal;
(a-2) applying a data voltage to the data line at the one side through the turned-on first multiplexer switch;
(a-3) applying a (n−2)-th scan signal to a first scan line disposed in a sub-pixel connected to the data line at the one side for two horizontal periods;
(a-4) turning on the first scan switch connected to and disposed between the data line at the one side and the first scan line, based on the (n−2)-th scan signal and for two horizontal periods; and
(a-5) applying the data voltage from the data line at the one side to the sub-pixel of the first scan line through the turned-on first scan switch.

### Claim 22 (depends on 21)

The method of claim 21, wherein the (b) includes:
(b-1) for next one horizontal period, turning on a second multiplexer switch connected to the data line at the another side, on based on a second multiplexer signal;
(b-2) applying a data voltage to the data line at the another side through the turned-on second multiplexer switch;
(b-3) applying an (n−1)-th scan signal to the third scan line disposed in a sub-pixel connected to the data line at the another side for two horizontal periods;
(b-4) turning on the third scan switch connected to and disposed between the data line at the another side and the third scan line, based on the (n−1)-th scan signal and for two horizontal periods (2H); and
(b-5) applying the data voltage from the data line at the another side to the sub-pixel of the third scan line through the turned-on third scan switch.

### Claim 23 (depends on 22)

The method of claim 22, wherein the (n−2)-th scan signal applied to the first scan line overlaps with the (n−1)-th scan signal applied to the third scan line for one horizontal period.

### Claim 24 (depends on 20)

The method of claim 20, wherein the (c) includes:
(c-1) for next one horizontal period (1H), turning on a first multiplexer switch connected to the data line at the one side, based on a first multiplexer signal;
(c-2) applying a data voltage to the data line at the one side through the turned-on first multiplexer switch;
(c-3) applying an n-th scan signal to the second scan line disposed in a pixel connected to the data line at the one side for two horizontal periods (2H);
(c-4) turning on the second scan switch connected to and disposed between the data line at the one side and the second scan line, based on the n-th scan signal and for two horizontal periods; and
(c-5) applying the data voltage from the data line at the one side to the sub-pixel of the second scan line through the turned-on second scan switch.

### Claim 25 (depends on 24)

The method of claim 24, wherein the (d) includes:
(d-1) for next one horizontal period, turning on a second multiplexer switch connected to the data line at the another side, based on a second multiplexer signal;
(d-2) applying a data voltage to the data line at the another side through the turned-on second multiplexer switch;
(d-3) applying an (n+1)-th scan signal to the fourth scan line disposed in a pixel connected to the data line at the another side for two horizontal periods;
(d-4) turning on the fourth scan switch connected to and disposed between the data line at the another side and the fourth scan line, based on the (n+1)-th scan signal and for two horizontal periods; and
(d-5) applying the data voltage from the data line at the another side to the sub-pixel of the fourth scan line through the turned-on fourth scan switch.

### Claim 26 (depends on 25)

The method of claim 25, wherein the n-th scan signal applied to the second scan line overlaps with the (n+1)-th scan signal applied to the fourth scan line for one horizontal period.