# US 2014/0198028 A1 · Display panel driver, method of driving display panel using the same and display apparatus having the same

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- Number: US 2014/0198028 A1
- Document ID: US20140198028A1
- Status: Published application
- Kind: A1
- Application number: 13/953,573
- Filed: 2013-07-29
- Published: 2014-07-17
- Earliest claimed: 2013-01-16
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Joo-Hyung Lee; Hee-Chul Hwang
- Web page: https://patentgrep.com/patent/US20140198028A1

## CPC

- G09G 5/10: Intensity circuits
- G06F 1/1613: {for portable computers (cooling arrangements therefor G06F1/203; constructional details or arrangements for pocket calculators, electronic agendas or books G06F15/0216; constructional details of portable telephone sets: with several bodies H04M1/0202)}
- G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)}
- G09G 3/2044: {using dithering}
- G06F 2200/1637: Sensing arrangement for detection of housing movement or orientation, e.g. for controlling scrolling or cursor movement on the display of an handheld computer
- G09G 2320/0261: in the context of movement of objects on the screen or movement of the observer relative to the screen
- G09G 2320/103: Detection of image changes, e.g. determination of an index representative of the image change
- G09G 2354/00: Aspects of interface with display user
- 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)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A display panel driver including a moving image determining part, a sensing part and a dithering part. The moving image determining part determines whether an input image data represents a moving image or a static image. The sensing part senses a movement of a display apparatus or a user of the display apparatus. The dithering part performs a dithering operation to the input image data when the input image data represents the moving image or when at least one of the display apparatus and the user moves when the input image data represents the static image.

## Claims

### Claim 1

A display panel driver comprising:
a moving image determining part configured to determine whether an input image data represents a moving image or a static image;
a sensing part configured to sense a movement of a display apparatus or a user of the display apparatus; and
a dithering part configured to perform a dithering operation to the input image data when:
the input image data represents the moving image, or
the input image data represents the static image and the movement of the display apparatus or the user is sensed.

### Claim 2 (depends on 1)

The display panel driver of claim 1, further comprising a memory configured to store the input image data,
wherein the moving image determining part is configured to analyze the input image data stored in the memory, and
wherein the moving image determining part is configured to analyze a command signal to access the memory to determine whether the input image data represents the moving image or the static image.

### Claim 3 (depends on 1)

The display panel driver of claim 1, wherein the sensing part comprises a sensor configured to sense the movement of the display apparatus.

### Claim 4 (depends on 3)

The display panel driver of claim 3, wherein the sensor is an acceleration sensor.

### Claim 5 (depends on 1)

The display panel driver of claim 1, wherein the sensing part comprises a sensor configured to sense the movement of the user.

### Claim 6 (depends on 5)

The display panel driver of claim 5, wherein the sensor is an infrared sensor configured to sense positions of eyeballs of the user.

### Claim 7 (depends on 1)

The display panel driver of claim 1, wherein the sensing part is configured to sense a relative movement between the display apparatus and the user, and
wherein the sensing part comprises a first sensor configured to sense the movement of the display apparatus and a second sensor configured to sense the movement of the user.

### Claim 8 (depends on 1)

The display panel driver of claim 1, wherein the dithering part comprises:
a first dithering part configured to perform a first dithering operation to the input image data when the input image data represents the moving image; and
a second dithering part configured to perform a second dithering operation to the input image data when the input image data represents the static image and the display apparatus or the user moves.

### Claim 9 (depends on 8)

The display panel driver of claim 8, wherein the first dithering operation is different from the second dithering operation,
a dithering degree of the first dithering operation is determined according to a movement of an object in the moving image, and
a dithering degree of the second dithering operation is determined according to the movement of the display apparatus or the user.

### Claim 10 (depends on 1)

The display panel driver of claim 1, further comprising an error diffusing part configured to diffuse quantization error of the dithered input image data to adjacent pixels.

### Claim 11 (depends on 1)

The display panel driver of claim 1, further comprising a pattern control part,
wherein the pattern control part is configured to control output image data to have X subframes when the dithering operation is applied to the input image data, X being a positive integer, and
the pattern control part is configured to control the output image data to have Y subframes when the dithering operation is not applied to the input image data, Y being a positive integer different from X.

### Claim 12 (depends on 11)

The display panel driver of claim 11, wherein X is greater than Y.

### Claim 13

A method of driving a display panel, the method comprising:
determining whether input image data represents a moving image or a static image;
sensing a movement of a display apparatus or a user of the display apparatus; and
performing a dithering operation to the input image data when:
the input image data represents the moving image; or
when the input image data represents the static image and the movement of the display apparatus or the user is sensed.

### Claim 14 (depends on 13)

The method of claim 13, further comprising storing the input image data to a memory,
wherein the determining whether input image data represents the moving image or the static image comprises analyzing the input image data inputted to the memory, and analyzing a command signal to access the memory.

### Claim 15 (depends on 13)

The method of claim 13, wherein the sensing the movement of the display apparatus or the user comprises sensing the movement of the display apparatus by a sensor.

### Claim 16 (depends on 15)

The method of claim 15, wherein the sensor is an acceleration sensor.

### Claim 17 (depends on 13)

The method of claim 13, wherein the sensing the movement of the display apparatus or the user comprises sensing the movement of the user by a sensor.

### Claim 18 (depends on 17)

The method of claim 17, wherein the sensor is an infrared sensor adapted to sense positions of eyeballs of the user.

### Claim 19 (depends on 13)

The method of claim 13, wherein the sensing the movement of the display apparatus or the user of the display apparatus comprises determining a relative movement between the display apparatus and the user using a first sensor sensing the movement of the display apparatus or a second sensor sensing the movement of the user.

### Claim 20

A display apparatus comprising:
a display panel comprising a gate line and a data line;
a controller comprising:
a moving image determining part configured to determine whether an input image data represents a moving image or a static image,
a sensing part configured to sense a movement of a display apparatus or a user of the display apparatus, and
a dithering part configured to perform a dithering operation to the input image data when:
the input image data represents the moving image, or
the input image data represents the static image and the movement of the display apparatus or the user is sensed, the controller configured to generate a first control signal, a second control signal and a data signal;
a gate driver configured to output a gate signal to drive the gate line based on the first control signal received from the controller; and
a data driver configured to output a data voltage to drive the data line based on the second control signal and the data signal received from the controller.