# US 2019/0172413 A1 · Sink device and power control method therefor

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- Number: US 2019/0172413 A1
- Document ID: US20190172413A1
- Status: Published application
- Kind: A1
- Application number: 16/322,386
- Filed: 2017-06-27
- Published: 2019-06-06
- Earliest claimed: 2016-08-03
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Jong-jin PARK; Je-hwan SEO; Seung-il YOON
- Web page: https://patentgrep.com/patent/US20190172413A1

## CPC

- G09G 5/006: {Details of the interface to the display terminal (specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04)}
- G06F 1/12: Synchronisation of different clock signals {provided by a plurality of clock generators}
- G06F 1/3215: Monitoring of peripheral devices
- G06F 1/3237: by disabling clock generation or distribution
- G06F 1/3246: by software initiated power-off
- G06F 1/3293: by switching to a less power-consuming processor, e.g. sub-CPU
- G09G 5/008: {Clock recovery}
- H04N 21/43635: {HDMI}
- H04N 21/4436: {Power management, e.g. shutting down unused components of the receiver (power management in computer systems G06F1/3203; hibernate or awake process in computer systems G06F9/4418)}
- G09G 2330/021: Power management, e.g. power saving
- G09G 2370/04: Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
- G09G 2370/12: Use of DVI or HDMI protocol in interfaces along the display data pipeline
- Y02D 10/00: Energy efficient computing, e.g. low power processors, power management or thermal management
- 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)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

The present invention relates to a sink device and a power control method therefor. The sink device comprises: an HDMI reception unit connected to a source device and receiving a signal transmitted by the source device; and a processor for turning on the power of the sink device when a TMDS clock is received from the source device. Therefore, the power of the sink device is automatically turned on, thereby enabling user convenience to improve.

## Claims

### Claim 1

A sink device comprising:
a high definition multimedia interface (HDMI) reception unit connected to a source device and receiving a signal transmitted by the source device; and
a processor configured to turn on the power of the sink device based on a transition minimized differential signaling (TMDS) clock being received from the source device.

### Claim 2 (depends on 1)

The sink device of claim 1, wherein the processor is configured to:
while the TMDS clock is not received from the source device, based on the TMDS clock being received, turn on power of the sink device.

### Claim 3 (depends on 1)

The sink device of claim 1, further comprising:
a signal processor;
a switch connected to a TMDS clock channel used for reception of the TMDS clock; and
a TMDS clock detection unit connected to the switch for detecting the TMDS clock,
wherein the processor is configured to:
determine whether the TMDS clock is received based on a signal that is output from the TMDS clock detection unit, and based on the TMDS clock being received, control a switching operation of the switch so that the TMDS clock is transmitted to the signal processor.

### Claim 4

A power control method of a sink device, the method comprising:
receiving a transition minimized differential signaling (TMDS) clock from the source device; and,
based on the TMDS clock being received from the source device, turning on power of the sink device.

### Claim 5 (depends on 4)

The power control method of claim 4, wherein the turning on power comprises, while the TMDS clock is not received from the source device, based on the TMDS clock being received, turning on power of the sink device.

### Claim 6 (depends on 4)

The power control method of claim 4, wherein the sink device further comprises:
a signal processor;
a switch connected to a TMDS clock channel used for reception of the TMDS clock; and
a TMDS clock detection unit connected to the switch for detecting the TMDS clock,
wherein the method further comprises:
determining whether the TMDS clock is received based on a signal that is output from the TMDS clock detection unit, and based on the TMDS clock being received, controlling a switching operation of the switch so that the TMDS clock is transmitted to the signal processor.