# US 11,443,693 B2 · Display control device, display device and method of controlling display device

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- Number: US 11,443,693 B2
- Document ID: US11443693B2
- Status: Granted
- Kind: B2
- Application number: 17/068,255
- Filed: 2020-10-12
- Published: 2021-04-22
- Granted: 2022-09-13
- Earliest claimed: 2019-10-17
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Shinji Takasugi
- Web page: https://patentgrep.com/patent/US11443693B2

## CPC

- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element
- G09G 3/3266: Details of drivers for scan electrodes
- G09G 3/3275: Details of drivers for data electrodes
- G09G 2300/0426: Layout of electrodes and connections
- G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G 2310/0218: with collection of electrodes in groups for n-dimensional addressing
- G09G 2310/0251: Precharge or discharge of pixel before applying new pixel voltage
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G09G 2320/0252: Improving the response speed
- G09G 2320/0261: in the context of movement of objects on the screen or movement of the observer relative to the screen
- G09G 2320/10: Special adaptations of display systems for operation with variable images
- 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 display control device for controlling a display device including a display panel having a plurality of pixels arranged in rows and columns includes: a first driving unit supplying a data voltage corresponding to a luminance to the pixels by the columns; and a second driving unit selecting the pixels receiving the data voltage by the rows, wherein the first driving unit and the second driving unit, in one frame: sequentially supply the data voltage for an image display to the pixels of a first block including a first group of the rows; supply a black level voltage to the pixels of a second block including a second group of the rows; and supply the black level voltage to the pixels in at least one of the rows of the first block while the black level voltage is supplied to the pixels of the second block.

## Claims

### Claim 1

A display control device for controlling a display device including a display panel having a plurality of pixels arranged in a plurality of rows and a plurality of columns, comprising:
a first driving circuit configured to supply a data voltage corresponding to a luminance to the plurality of pixels by the plurality of columns; and
a second driving circuit configured to select the plurality of pixels receiving the data voltage by the plurality of rows,
wherein the plurality of rows are grouped into a plurality of blocks including at least a first block of rows and a second block of rows,
wherein the first driving circuit and the second driving circuit are configured to, in one frame:
sequentially supply, in consecutive horizontal periods, the data voltage for an image display to the plurality of pixels in at least one row among the first block of rows and a black level voltage to the plurality of pixels in at least one other row among the first block of rows; and
supply the black level voltage to the plurality of pixels in each of the second block of rows concurrently with supplying the black level voltage to the at least one other row among the first block of rows, and
wherein the second driving circuit is configured to supply a scan signal having a width of two horizontal periods to the at least one of the first block of rows to supply the data voltage to the plurality of pixels in the at least one of the first block of rows.

### Claim 2 (depends on 1)

The device of claim 1, wherein the first driving circuit is configured to modify the data voltage according to a total number of rows of the first block and a number of rows of the first block receiving the black level voltage.

### Claim 3 (depends on 2)

The device of claim 2, wherein if the total number of rows of the first block is p and the number of rows of the first block receiving the black level voltage is q, the first driving circuit is configured to modify the data voltage such that the luminance increases by p/(p−q) times.

### Claim 4 (depends on 1)

The device of claim 1, wherein the plurality of pixels in the at least one other row among the first block of rows supplied with the black level voltage is not supplied with the data voltage corresponding to the at least one row among the first block of rows during the one frame.

### Claim 5 (depends on 1)

The device of claim 1, wherein the first block of rows and the second block of rows have a same total number of rows.

### Claim 6 (depends on 1)

The device of claim 1, wherein a high level of a scan signal supplied to the plurality of pixels in each of the second block of rows overlaps a high level of a scan signal supplied to the plurality of pixels in the at least one other row among the first block of rows.

### Claim 7 (depends on 1)

The device of claim 1, wherein the scan signal includes one high level during one frame.

### Claim 8 (depends on 1)

The device of claim 1, wherein the scan signals overlap each other by one horizontal period.

### Claim 9

A method of controlling a display device including a display panel having a plurality of pixels arranged in a plurality of rows and a plurality of columns, comprising:
supplying a data voltage corresponding to a luminance to the plurality of pixels by the plurality of columns; and
selecting the plurality of pixels receiving the data voltage by the plurality of rows,
wherein the plurality of rows are grouped into a plurality of blocks including at least a first block of rows and a second block of rows, and
wherein the supplying of the data voltage and the selecting of the plurality of pixels include, in one frame:
sequentially supplying, in consecutive horizontal periods, the data voltage for an image display to the plurality of pixels in at least one row among the first block of rows and a black level voltage to the plurality of pixels in at least one other row among the first block of rows;
supplying the black level voltage to the plurality of pixels in each of the second block of rows concurrently with supplying the black level voltage to the at least one other row among the first block of rows; and
supplying a scan signal having a width of two horizontal periods to the at least one of the first block of rows to supply the data voltage to the plurality of pixels in the at least one of the first block of rows.

### Claim 10 (depends on 9)

The method of claim 9, wherein the plurality of pixels in the at least one other row among the first block of rows supplied with the black level voltage is not supplied with the data voltage corresponding to the at least one row among the first block of rows during the one frame.

### Claim 11

A method of controlling a display device including a display panel having a plurality of pixels arranged in a plurality of rows and a plurality of columns, comprising:
supplying a data voltage corresponding to a luminance to the plurality of pixels by the plurality of columns; and
selecting the plurality of pixels receiving the data voltage by the plurality of rows,
wherein the plurality of rows are grouped into a plurality of blocks including at least a first block of rows and a second block of rows, and
wherein the supplying of the data voltage and the selecting of the plurality of pixels include, in one frame:
sequentially supplying the data voltage for an image display to the plurality of pixels in at least one row among the first block of rows and supplying neither the data voltage nor a black level voltage to the plurality of pixels in at least one other row among the first block of rows;
supplying a black level voltage to the plurality of pixels in each of the second block of rows; and
supplying a scan signal having a width of two horizontal periods to the at least one of the first block of rows to supply the data voltage to the plurality of pixels in the at least one of the first block of rows.

### Claim 12 (depends on 11)

The method of claim 11, wherein a scan signal supplied to the plurality of pixels in the at least one other row among the first block of rows does not have a high level.