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"Packet-Based Digital Display Interface Signal Mapping to Micro Serial Interface" in Patent Application Approval Process

February 20, 2014



By a News Reporter-Staff News Editor at Politics & Government Week -- A patent application by the inventor KOBAYASHI, Alan Osamu (Los Altos, CA), filed on October 3, 2013, was made available online on February 6, 2014, according to news reporting originating from Washington, D.C., by VerticalNews correspondents.

This patent application is assigned to STMicroelectronics, Inc.

The following quote was obtained by the news editors from the background information supplied by the inventors: "Many multimedia devices are becoming increasing popular. Such devices are being used more frequently as devices for taking and storing videos, picture, music files and software applications ('apps') and the like, for a wide variety of functions, and so on. Currently, these devices have various ports for data transfer. They are used for powering the device or backing up data. They are also used for transmitting data onto and from phones.

"Some of these ports support standards which currently have one differential pair, D+ Diff_pos) and D-(Diff_neg). Upgraded versions of these standards may be significantly faster and full duplex. They may support a Tx and Rx pair which allows data to be sent without first having to wait for a reply. This enables extremely quick downloads of digital video, such as movies and other high-volume data, and makes the devices even more multimedia-centric. For example, multimedia device manufacturers are beginning to incorporate these standards into their phones, and it is expected that users will want to be able to download or show pictures, videos, and other content directly to an external display device from their devices (without use of a computer or other component). Micro versions of these standards are also gaining wide acceptance in the marketplace. It is expected that users will want to be able to download multimedia content directly from mobile devices on to an external display device. Thus, it would be desirable to be able to map digital multimedia content onto micro versions of these standards from a packet-based digital display interface and supply power from the display device to the mobile device simultaneously."

In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventor's summary information for this patent application: "In one aspect of the invention, methods of enabling transmission of multimedia or other types of data and enabling the supply of power between a data source device and an external display device are described. Main link signals of a packet-based interface are mapped to a micro serial interface ID pin. A hot plug detect (HPD) signal of the packet-based interface is mapped to the MicroUSB2.0 ID pin. These mappings enable transport of the data stream from the data source device to the external display device. Power is supplied from the external display device to the source device using a micro serial interface connection while simultaneously transporting the data stream.

"In one embodiment, an auxiliary channel positive signal is mapped to a first differential I/O signal and an auxiliary channel negative signal is mapped to a second differential I/O signal. In another embodiment, sideband communications are completed before main link transmission of multimedia content begins. In another embodiment, power is supplied over a packet-based interface power pin to a Vbus pin. In yet another embodiment, an auxiliary/HPD controller is utilized for mapping the HPD signal and for mapping the auxiliary channel signals.

"Another aspect of the present invention is a cable adaptor for connecting a data source device with a display device. The cable adaptor has a packet-based interface connector at a first end having a positive main link pin, a negative main link pin, a positive auxiliary channel pin, and a negative auxiliary channel pin. At the second end, the cable adaptor has a micro serial interface connector, wherein multimedia content is transmitted over the adaptor and electrical power is supplied over the adaptor simultaneously. The adaptor also has an auxiliary and HPD controller having a specific number of signals.

"In one embodiment, the packet-based interface connector has a pin for HPD signals. The main link positive signal is mapped to a positive differential signal. In one embodiment, the auxiliary and HPD controller has two differential input/output signals, an ID signal, and an HPD signal.

"In one aspect of the invention, methods of enabling transmission of multimedia or other types of data and enabling the supply of power between a data source device and an external display device are described. In particular embodiments suitable for enabling more than one power level to be transmitted to a source device by a display are disclosed.

"In one embodiment, a multimedia data source device comprises a multimedia data processor suitable for providing multimedia data and operating using a negotiated power from an external display device. Also comprising power level determination circuitry for negotiating a power level to be received from the external display device enabling operating of the multimedia data source device. Further comprising an interface system suitable for coupling with the external display device. Further comprising an interface system suitable for coupling with the external display device. The interface enabling a main data link, a power connection suitable for receiving the negotiated power from the external display device, and an auxiliary channel suitable for transmitting sideband data between the external display device and the source device.

"Another aspect of the present invention is a multimedia data display device with a display media suitable for displaying multimedia content and power level determination circuitry for negotiating a power level to be transmitted by the display device to a source device to enable operation of source. Further comprising an interface system suitable for coupling the display with the external display device. The interface enabling a main data link, a power connection suitable for transmitting the negotiated power to a source device, and an auxiliary channel suitable for transmitting sideband data between the display device and the source device.

"In another aspect, the invention describes a method of enabling power transmission at a negotiated power level from a display device to a connected source device. The method includes establishing a connection between a multimedia data source device and an external display device, the connection comprising a power connection and an auxiliary data connection. Then a power level is negotiated for power transmission from the display device to the source device to enable operation of the multimedia data source. Once negotiated, the negotiated power is transmitted from the external display device to the source device.

"General aspects of the invention include, but are not limited to methods, systems, apparatus, and computer-readable media for enabling message transmission in multimedia device networks.

BRIEF DESCRIPTION OF THE DRAWINGS

"The invention and the advantages thereof may best be understood by reference to the following description taken in conjunction with the accompanying drawings in which:

"FIG. 1 is a simplified network diagram showing a multimedia device connected to an external display device via a cable in accordance with one embodiment;

"FIG. 2 is a block diagram of a serial interface receiver connector component of a multimedia device;

"FIG. 3A is a pin diagram of a packet-based display interface receiver connector of an external display in accordance with one embodiment;

"FIG. 3B is a block diagram of a serial interface receiving connector on a external display;

"FIG. 4 is a pin diagram of a packet-based display interface receiver connector of an external display in accordance with an alternative embodiment;

"FIG. 5 is a detailed block diagram showing in greater detail the components of FIG. 1 in accordance with one embodiment;

"FIG. 6 is a block diagram of a packet-based interface source plug connector in accordance with an alternative embodiment;

"FIG. 7 is a flow diagram of a process of transmitting data and providing power between an external display device and a multimedia device in accordance with one embodiment;

"FIG. 8 is a flow diagram of a process of supplying power from the external display to the multimedia device in accordance with one embodiment;

"FIG. 9 is an overview block diagram showing a connection between a multimedia device and an external display device in accordance with one embodiment;

"FIG. 10 is a block diagram showing in greater detail the components shown in FIG. 9 in accordance with one embodiment;

"FIG. 11 is a block diagram of a device PCB having a passive bi-directional switch (multiplexer) in accordance with one embodiment;

"FIG. 12 is a block diagram of a device PCB where a packet-based ML TX PHY and a USB PHY share the same pads in accordance with an alternative embodiment;

"FIG. 13 is a simplified network diagram showing a multimedia device connected to an external display device via a cable in accordance with one embodiment; and

"FIG. 14 is a flow diagram of a process of providing power from an external display device to a multimedia device in accordance with one embodiment.

"In the drawings, like reference numerals are sometimes used to designate like structural elements. It should also be appreciated that the depictions in the figures are diagrammatic and not to scale."

URL and more information on this patent application, see: KOBAYASHI, Alan Osamu. Packet-Based Digital Display Interface Signal Mapping to Micro Serial Interface. Filed October 3, 2013 and posted February 6, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=443&p=9&f=G&l=50&d=PG01&S1=20140130.PD.&OS=PD/20140130&RS=PD/20140130

Keywords for this news article include: STMicroelectronics Inc.

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Source: Politics & Government Week


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