# US 11,115,616 B2 · Display system, display method, and display apparatus

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- Number: US 11,115,616 B2
- Document ID: US11115616B2
- Status: Granted
- Kind: B2
- Application number: 16/921,218
- Filed: 2020-07-06
- Published: 2020-10-22
- Granted: 2021-09-07
- Earliest claimed: 2014-06-10
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Kengo Terada; Masayuki Kozuka; Takahiro Nishi; Tadamasa Toma
- Web page: https://patentgrep.com/patent/US11115616B2

## CPC

- H04N 5/57: Control of contrast or brightness
- G06F 3/14: Digital output to display device {; Cooperation and interconnection of the display device with other functional units}
- G09G 5/10: Intensity circuits
- H04N 5/20: Circuitry for controlling amplitude response
- H04N 5/76: Television signal recording
- H04N 7/01: Conversion of standards {, e.g. involving analogue television standards or digital television standards processed at pixel level}
- H04N 7/0125: {one of the standards being a high definition standard}
- H04N 7/015: High-definition television systems
- H04N 9/7925: {for more than one standard}
- H04N 9/87: Regeneration of colour television signals (H04N9/80 takes precedence)
- G09G 2320/0276: for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
- G09G 2370/04: Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- 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 system includes a conversion apparatus converting video luminance including a luminance value in a first luminance range and a display apparatus connected thereto and displaying the video. The conversion apparatus includes a first acquisition unit, a first luminance converter, a second luminance converter, a quantization converter, and an output unit outputting a third luminance signal to the display apparatus. The display apparatus includes: a second acquisition unit acquiring the third luminance signal and setting information indicating display settings recommended to the display apparatus in display of the video; a display setting unit setting the display apparatus, using the setting information; a third luminance converter converting a third code value indicated by the third luminance signal into a second luminance value compatible with a second luminance range, using the setting information; and a display controller displaying the video on the display apparatus based on the second luminance value.

## Claims

### Claim 1

A display apparatus comprising:
an electro-optical transfer function (EOTF) converter that receives a video signal having a first luminance range and performs EOTF conversion on the video signal to obtain a first luminance value;
a luminance converter, which is provided for converting the video signal into a pseudo High Dynamic Range signal having a second luminance range, a maximum value of the second luminance range being smaller than a maximum value of the first luminance range, the luminance converter that converts the first luminance value into a second luminance value within the second luminance range, the maximum value of the second luminance range being larger than a maximum value of a luminance of a Standard Dynamic Range (SDR) signal, and the maximum luminance value of the SDR signal being 100 nit; and
a display that displays the pseudo High Dynamic Range signal having the second luminance range based on the second luminance value,
wherein the maximum value of the second luminance range is a maximum possible display peak luminance (DPL) that the display is capable of displaying, and is greater than the maximum luminance value of the SDR signal,
wherein the luminance converter performs conversion of the first luminance value into the second luminance value, based on content luminance information of the video signal, and
wherein the content luminance information includes an average value of luminance values of the video signal (CAL: Content Average Luminance) and a maximum value among luminance values of the video signal (CPL: Content Peak Luminance).