# US 10,310,578 B2 · Systems, methods, and media for providing power to an HDMI source

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- Number: US 10,310,578 B2
- Document ID: US10310578B2
- Status: Granted
- Kind: B2
- Application number: 15/319,265
- Filed: 2015-06-19
- Published: 2017-05-18
- Granted: 2019-06-04
- Earliest claimed: 2014-06-19
- Assignees: Google Inc.
- Applicants: Google LLC
- Inventors: Maurice Alou
- Web page: https://patentgrep.com/patent/US10310578B2

## CPC

- G06F 1/266: {Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips}
- G06F 1/1626: {with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]}
- 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)}
- G09G 5/008: {Clock recovery}
- G09G 2370/12: Use of DVI or HDMI protocol in interfaces along the display data pipeline
- G09G 2370/22: Detection of presence or absence of input display information or of connection or disconnection of a corresponding information source
- 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

Systems, methods, and media for providing power to an HDMI source are provided. In accordance with some implementations, methods for providing power to an HDMI source are provided, the methods comprising: providing an AC signal to an HPD line of an HDMI port; determining that an L-C circuit is present on the HPD line when applying the AC signal; and in response to determining that an L-C circuit is present on the HPD line, connecting a power source to an HDMI 5V line of the HDMI port. In some implementations, the AC signal is a 231 kHz waveform. In some implementations, the AC signal is generated using a clock output. In some implementations, the methods further comprise integrating the clock output to provide the AC signal. In some implementations, the methods further comprise switching the frequency of the AC signal.

## Claims

### Claim 1

A method for providing power to an HDMI source, comprising:
providing an AC signal to an HPD line of an HDMI port;
determining that an L-C circuit is present on the HPD line when applying the AC signal; and
in response to determining that an L-C circuit is present on the HPD line, connecting a power source to an HDMI 5V line of the HDMI port.

### Claim 2 (depends on 1)

The method of claim 1, wherein the AC signal is a 231 kHz waveform.

### Claim 3 (depends on 2)

The method of claim 2, wherein the AC signal is generating using a clock output.

### Claim 4 (depends on 3)

The method of claim 3, further comprising integrating the clock output to provide the AC signal.

### Claim 5 (depends on 1)

The method of claim 1, further comprising switching the frequency of the AC signal.

### Claim 6 (depends on 1)

The method of claim 1, wherein determining that an L-C circuit is present on the HPD line comprises determining whether the AC signal is resonating in the L-C circuit.

### Claim 7 (depends on 1)

The method of claim 1, further comprising:
detecting a value of an HPD line of an HDMI sink; and
providing the value to an HPD line of an HDMI source.

### Claim 8 (depends on 1)

The method of claim 1, further comprising:
determining that an L-C circuit is not present on the HPD line when applying the AC signal; and
in response to determining that an L-C circuit is not present on the HPD line, disconnecting a power source from an HDMI 5V line of the HDMI port.

### Claim 9

A circuit for providing power to an HDMI source, comprising:
a microcontroller configured to:
provide an AC signal to an HPD line of an HDMI port;
determine that an L-C circuit is present on the HPD line when applying the AC signal; and
in response to determining that an L-C circuit is present on the HPD line, connect a power source to an HDMI 5V line of the HDMI port.

### Claim 10 (depends on 9)

The circuit of claim 9, wherein the AC signal is a 231 kHz waveform.

### Claim 11 (depends on 10)

The circuit of claim 10, wherein the AC signal is generating using a clock output of the microcontroller.

### Claim 12 (depends on 11)

The circuit of claim 11, further comprising an integrator coupled to the clock output which integrates to the clock output to provide the AC signal.

### Claim 13 (depends on 9)

The circuit of claim 9, wherein the microcontroller also switches the frequency of the AC signal.

### Claim 14 (depends on 9)

The circuit of claim 9, wherein determining that an L-C circuit is present on the HPD line comprises determining whether the AC signal is resonating in the L-C circuit.

### Claim 15 (depends on 9)

The circuit of claim 9, wherein the microcontroller also:
detects a value of an HPD line of an HDMI sink; and
provides the value to an HPD line of an HDMI source.

### Claim 16 (depends on 9)

The circuit of claim 9, wherein the microcontroller also:
determines that an L-C circuit is not present on the HPD line when applying the AC signal; and
in response to determining that an L-C circuit is not present on the HPD line, disconnects a power source from an HDMI 5V line of the HDMI port.