# US 2023/0410752 A1 · Electronic device and method of driving the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2023/0410752 A1
- Document ID: US20230410752A1
- Status: Published application
- Kind: A1
- Application number: 18/243,079
- Filed: 2023-09-06
- Published: 2023-12-21
- Earliest claimed: 2021-04-12
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: HEERIM SONG; GYUNGSOON PARK; Jinseok JEONG
- Web page: https://patentgrep.com/patent/US20230410752A1

## CPC

- G09G 3/3241: the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror
- G09G 3/3266: Details of drivers for scan electrodes
- G09G 3/035: {for flexible display surfaces}
- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 2230/00: Details of flat display driving waveforms
- G09G 2310/0216: Interleaved control phases for different scan lines in the same sub-field, e.g. initialization, addressing and sustaining in plasma displays that are not simultaneous for all scan lines
- G09G 2310/0221: with use of split matrices (G09G3/3644 and G09G3/3666 take precedence)
- G09G 2310/0251: Precharge or discharge of pixel before applying new pixel voltage
- G09G 2310/0281: Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure
- G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit
- G09G 2320/0209: Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
- G09G 2320/0233: Improving the luminance or brightness uniformity across the screen
- G09G 2320/0686: with two or more screen areas displaying information with different brightness or colours
- G09G 2330/021: Power management, e.g. power saving
- G09G 2330/022: in absence of operation, e.g. no data being entered during a predetermined time
- G09G 2330/06: Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
- G09G 2340/0435: Change or adaptation of the frame rate of the video stream
- G09G 2380/02: Flexible displays
- G11C 19/28: using semiconductor elements (G11C19/14, G11C19/36 take precedence)
- 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)
- G11C: STATIC STORES (semiconductor memory devices H10B)

## Abstract

An electronic device includes a display panel including pixels respectively connected to scan lines, scan stages corresponding to the scan lines, where each of the scan stages receives a carry signal, and outputs a scan signal, masking circuits electrically connected to some of the scan stages, respectively, where each of the masking circuits outputs a masking carry signal in response to a masking signal and the scan signal, and transmission circuits electrically connected to others of the scan stages, respectively, where each of the transmission circuits outputs the scan signal output from a corresponding scan stage among the scan stages. A j-th (j is an integer greater than 1) scan stage among the scan stages receives one of the scan signal output from a (j−1)-th scan stage and the masking carry signal as the carry signal.

## Claims

### Claim 1

An electronic device comprising:
a display panel comprising a plurality of data lines, a plurality of scan lines, and a plurality of pixels connected to the data lines and the scan lines;
a plurality of scan stages corresponding to the scan lines, wherein each of the scan stages receives clock signals and a carry signal, and outputs a scan signal; and
a plurality of masking circuits electrically connected to at least two scan stages among the scan stages, respectively, wherein each of the masking circuits receives a masking signal and outputs a masking carry signal in response to the masking signal and the scan signal of a corresponding stage connected thereto as the carry signal of a next stage of the corresponding stage connected thereto,
wherein the masking signal comprises a first masking signal and a second masking signal, and
wherein each of the masking circuits comprises:
a first masking transistor connected between a terminal of the corresponding scan stage, from which the scan signal of the corresponding scan stage is output, and a carry output terminal, wherein the first masking transistor includes a first gate electrode which receives the first masking signal; and
a second masking transistor connected between the carry output terminal and a first voltage terminal which receives a first voltage of the corresponding scan stage, wherein the second masking transistor includes a second gate electrode which receives the second masking signal.

### Claim 2 (depends on 1)

The electronic device of claim 1, wherein
each of the masking circuits outputs the scan signal output from the corresponding scan stage as the masking carry signal when the first masking signal has a first level and the second masking signal has a second level different from the first level, and
each of the masking circuits does not output the scan signal output from the corresponding scan stage as the masking carry signal when the first masking signal has the second level and the second masking signal has the first level.

### Claim 3 (depends on 1)

The electronic device of claim 1, further comprising a plurality of transmission circuits electrically connected to remaining scan stages among the scan stages other than the at least two stages, respectively, wherein each of the transmission circuits does not receive the masking signal and outputs the scan signal output from a corresponding scan stage connected thereto as the carry signal of a next stage of the corresponding stage connected thereto.

### Claim 4 (depends on 3)

The electronic device of claim 3, wherein each of the transmission circuits comprises:
a first transmission transistor connected between the terminal of the corresponding scan stage and the carry output terminal, wherein the first transmission transistor includes a third gate electrode which receives the first voltage; and
a second transmission transistor connected between the carry output terminal and the first voltage terminal, wherein the second transmission transistor includes a fourth gate electrode which receives a second voltage different from the first voltage.

### Claim 5 (depends on 1)

The electronic device of claim 1, further comprising:
a driving controller which drives the display panel in a multi-frequency mode and a normal mode.

### Claim 6 (depends on 5)

The electronic device of claim 5, wherein
the display panel comprises a first display area and a second display area adjacent to the first display area,
the first display area is driven at a first driving frequency in the multi-frequency mode, and
the second display area is driven at a second driving frequency different from the first driving frequency in the multi-frequency mode.

### Claim 7 (depends on 6)

The electronic device of claim 6, wherein the first driving frequency is higher than the second driving frequency.

### Claim 8 (depends on 6)

The electronic device of claim 6, wherein the driving controller controls the scan stages and the masking circuits.

### Claim 9 (depends on 6)

The electronic device of claim 6, wherein the driving controller substantially simultaneously displays a still image and a video through the first display area in the multi-frequency mode and changes the multi-frequency mode of the first display area to the normal mode when a time duration of the still image reaches a predetermined time.

### Claim 10 (depends on 3)

The electronic device of claim 3, wherein areas in which the masking circuits are respectively disposed are the same as areas in which the transmission circuits are respectively disposed.

### Claim 11 (depends on 1)

The electronic device of claim 1, further comprising:
a plurality of light emitting stages,
wherein the display panel further comprises a plurality of light emitting control lines electrically connected to the pixels, respectively, and
the light emitting stages are electrically connected to the light emitting control lines, respectively, and receive the clock signals and the carry signal.

### Claim 12 (depends on 11)

The electronic device of claim 11, wherein
the scan stages comprise first scan stages, second scan stages and third scan stages,
areas in which the first scan stages, the second stages, and the light emitting stages are respectively disposed have a same size as each other, and
areas in which the third scan stages are respectively disposed have a size smaller than areas in which the first scan stages are respectively disposed.

### Claim 13 (depends on 1)

The electronic device of claim 1, wherein the masking signal has a width greater than a width of the scan signal.

### Claim 14 (depends on 13)

The electronic device of claim 13, wherein the scan signal comprises:
a first portion having a first level; and
a second portion subsequent to the first portion and having a second level lower than the first level.

### Claim 15 (depends on 13)

The electronic device of claim 13, wherein the masking signal overlaps an entire portion of the scan signal output from one of the scan stages respectively connected to the masking circuits.

### Claim 16 (depends on 1)

The electronic device of claim 1, wherein a first scan signal output from an n-th scan stage among the scan stages respectively connected to the masking circuits does not overlap a second scan signal output from an (n−1)-th scan stage among the scan stages,
wherein n is an integer greater than 1.

### Claim 17 (depends on 16)

The electronic device of claim 16, wherein the second scan signal does not overlap the masking signal.

### Claim 18 (depends on 16)

The electronic device of claim 16, wherein the first scan signal overlaps the masking signal.

### Claim 19 (depends on 16)

The electronic device of claim 16, wherein the masking signal has a width greater than a width of each of the first and second scan signals.