# US 2017/0256189 A1 · Transmission device, display device, and display system

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- Number: US 2017/0256189 A1
- Document ID: US20170256189A1
- Status: Published application
- Kind: A1
- Application number: 15/062,200
- Filed: 2016-03-07
- Published: 2017-09-07
- Earliest claimed: 2016-03-07
- Assignees: Panasonic Liquid Crystal Display Co., Ltd.
- Applicants: Panasonic Liquid Crystal Display Co., Ltd.
- Inventors: Seiji KAWAGUCHI; Tatsuo ITOMAN
- Web page: https://patentgrep.com/patent/US20170256189A1

## CPC

- G09G 3/18: using liquid crystals
- G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)}
- G09G 2320/0686: with two or more screen areas displaying information with different brightness or colours
- G09G 2340/00: Aspects of display data processing
- G09G 2340/16: Determination of a pixel data signal depending on the signal applied in the previous frame
- G09G 2350/00: Solving problems of bandwidth in display systems
- 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

Provided is a display system, including: a display device configured to display an image; and a transmission device configured to simultaneously transmit, to the display device, first image data of a first frame and second image data of a second frame that is one frame before the first frame, the display device including: an overdrive processing unit configured to receive the first image data and the second image data transmitted from the transmission device, and to execute overdrive processing on the first image data based on the received first image data and the received second image data, to thereby generate display data; and a display panel configured to display an image based on the display data generated by the overdrive processing unit.

## Claims

### Claim 1

A display system, comprising:
a display device configured to display an image; and
a transmission device configured to simultaneously transmit, to the display device, first image data of a first frame and second image data of a second frame that is one frame before the first frame,
the display device comprising:
an overdrive processing unit configured to receive the first image data and the second image data transmitted from the transmission device, and to execute overdrive processing on the first image data based on the received first image data and the received second image data, to thereby generate display data; and
a display panel configured to display an image based on the display data generated by the overdrive processing unit.

### Claim 2 (depends on 1)

The display system according to claim 1,
wherein the transmission device is configured to generate overdrive image data of (A+B) bits such that the second image data is allocated to A bits and the first image data is allocated to B bits, to thereby transmit the generated overdrive image data to the display device, and
wherein the overdrive processing unit is configured to execute the overdrive processing on the first image data based on the second image data and the first image data.

### Claim 3 (depends on 2)

The display system according to claim 2, wherein the transmission device is configured to:
transmit, for a region having low grayscale characteristics, the overdrive image data of (A+B) bits to the display device; and
transmit, for a region having high grayscale characteristics, the first image data of (A+B) bits to the display device.

### Claim 4 (depends on 2)

The display system according to claim 2,
wherein the display panel comprises an in-vehicle panel installed on a vehicle, and
wherein the overdrive image data corresponds to an instrument cluster image of the in-vehicle panel.

### Claim 5 (depends on 4)

The display system according to claim 4, wherein the transmission device is configured to:
transmit, for a region of the instrument cluster image, the overdrive image data of (A+B) bits to the display device; and
transmit, for a region other than the region of the instrument cluster image, the first image data of (A+B) bits to the display device.

### Claim 6 (depends on 2)

The display system according to claim 2, wherein the overdrive image data of (A+B) bits is set to satisfy A<B.

### Claim 7 (depends on 1)

The display system according to claim 1,
wherein the transmission device further comprises a specifying unit configured to specify an overdrive region, and
wherein the transmission device is configured to:
transmit, for the overdrive region specified by the specifying unit, the first image data and the second image data simultaneously to the display device; and
transmit, for a region other than the overdrive region, the first image data to the display device.

### Claim 8 (depends on 1)

The display system according to claim 1,
wherein the transmission device further comprises a first transmission interface and a second transmission interface,
wherein the display device further comprises a first receiving interface and a second receiving interface,
wherein the display system further comprises a first transmission line configured to connect the first transmission interface and the first receiving interface to each other, and a second transmission line configured to connect the second transmission interface and the second receiving interface to each other, and
wherein the transmission device is configured to transmit the first image data to the display device via the first transmission line, and to transmit the second image data to the display device via the second transmission line.

### Claim 9

A display system, comprising:
a display device configured to display an image; and
a transmission device configured to transmit, to the display device, first image data of a first frame and second image data of a second frame that is one frame before the first frame,
the display device comprising:
an overdrive processing unit configured to receive the first image data and the second image data transmitted from the transmission device, and to execute overdrive processing on the first image data based on the received first image data and the received second image data, to thereby generate display data; and
a display panel configured to display an image based on the display data generated by the overdrive processing unit,
the transmission device further comprising a first transmission interface,
the display device further comprising a first receiving interface,
the display system further comprising a first transmission line configured to connect the first transmission interface and the first receiving interface to each other,
the transmission device being configured to, when the overdrive processing is not executed, transmit the first image data to the display device via the first transmission line at a first transfer speed, and when the overdrive processing is executed, transmit the first image data and the second image data to the display device via the first transmission line at a transfer speed twice as high as the first transfer speed.

### Claim 10

A transmission device, which is configured to transmit image data to a display device,
the transmission device being configured to simultaneously transmit, to the display device, first image data of a first frame and second image data of a second frame that is one frame before the first frame.

### Claim 11 (depends on 10)

The transmission device according to claim 10, wherein the transmission device is configured to generate overdrive image data of (A+B) bits such that the second image data is allocated to A bits and the first image data is allocated to B bits, to thereby transmit the generated overdrive image data to the display device.

### Claim 12 (depends on 11)

The transmission device according to claim 11, wherein the transmission device is configured to:
transmit, for a region having low grayscale characteristics, the overdrive image data of (A+B) bits to the display device; and
transmit, for a region having high grayscale characteristics, the first image data of (A+B) bits to the display device.

### Claim 13 (depends on 11)

The transmission device according to claim 11, wherein the overdrive image data of (A+B) bits is set to satisfy A<B.