# US 2017/0287347 A1 · Multi-screen casting system for flipped teaching classroom

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- Number: US 2017/0287347 A1
- Document ID: US20170287347A1
- Status: Published application
- Kind: A1
- Application number: 15/088,129
- Filed: 2016-04-01
- Published: 2017-10-05
- Earliest claimed: 2016-04-01
- Assignees: Teh-Chau Liau
- Inventors: Teh-Chau Liau; Jian Qi Shen; Shun-Feng Su
- Web page: https://patentgrep.com/patent/US20170287347A1

## CPC

- G09B 5/125: {the stations being mobile}
- G09B 5/067: {Combinations of audio and projected visual presentation, e.g. film, slides}
- H04N 21/4122: {additional display device, e.g. video projector (digital output for controlling a plurality of local displays G06F3/1423)}
- H04N 21/41415: {involving a public display, viewable by several users in a public space outside their home, e.g. movie theatre, information kiosk}
- H04N 21/43635: {HDMI}
- H04N 21/43637: {involving a wireless protocol, e.g. Bluetooth®, RF or wireless LAN [IEEE 802.11] (arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114)}
- H04N 21/632: {using a connection between clients on a wide area network, e.g. setting up a peer-to-peer communication via Internet for retrieving video segments from the hard-disk of other client devices (broadcast-related systems characterised by transmission among terminal devices H04H60/80; distributed application using peer-to-peer [P2P] networks H04L67/104)}
- G09B: EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS (devices for psychotechnics or for testing reaction times A61B5/16; games, sports, amusements A63; projectors, projector screens G03B)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

The multi-screen casting system for a flipped teaching classroom contains, with the classroom, at least a receiving screen having a video/audio receiving interface connected to a multimedia streaming device, a set of at least two inter-casting devices, and a wireless broad band base station providing dual-band (2.4 GHz and 5.0 GHz) WiFi LAN communications. The multimedia streaming device contains firmware for locating and processing video/audio transmission within the WiFi LAN, and presenting received video/audio or data on the connected receiving screen. Each inter-casting device is one of a notebook computer, a smart phone, and a tablet computer. The inter-casting devices conduct, in a time-sharing manner, peer-to-peer communications among themselves and many-to-one communications to the multimedia steaming device of the receiving screen.

## Claims

### Claim 1

A multi-screen casting system for a plurality of students and at least a teacher within a flipped teaching classroom, comprising, within the classroom,
a first receiving screen having a first video/audio/data receiving interface (HDMI, High-Definition Multimedia Interface), where the first receiving screen is a self-illuminating display device;
a second receiving screen having a second video/audio/data receiving interface (HDMI, High-Definition Multimedia Interface), where the second receiving screen is a reflection-type display device;
a first multimedia streaming device which is controlled by the top-governed teacher and wiredly or wirelessly connected to the first and second video/audio/data receiving interfaces (displaying identical contents), respectively;
a second multimedia streaming device which is comprised in the inter-casting devices and wirelessly connected to the first and second video/audio/data receiving interfaces (displaying identical contents), respectively;
a plurality of inter-casting devices, one for each student and the temporally moderated teacher, where each inter-casting device is one of a notebook computer/smart phone/tablet computer and can be the one of second multimedia streaming device on demand; and
a wireless broad band base station providing a dual-band (2.4 GHz and 5.0 GHz) WiFi local area network (LAN);
wherein each of the inter-casting devices conducts a peer-to-peer transmission of video/audio/data with another inter-casing device or with one of the first and second multimedia streaming devices over the WiFi LAN;
each of the inter-casting devices conducts a peer to multi-peer (i.e., one-to-many) transmission of video/audio/data with the first and second multimedia streaming devices and at least another one inter-casing device over the WiFi LAN;
the first and second multimedia streaming devices may assign the video/audio/data material to be displayed on the first and second receiving screens;
the peer-to-peer and peer-to-multi-peer (i.e., one-to-many) transmissions of video/audio/data occur in a time-sharing manner and shunt-distributed-channel allocation among the inter-casting device over the WiFi LAN; and
the first and second receiving screens are always visible to all inter-casting devices (i.e., the students and the top-governed/temporally-moderated teacher).

### Claim 2 (depends on 1)

The multi-screen casting system according to claim 1, wherein the first receiving screen is a High Definition Multimedia Interface (HDMI) interfaced television set.

### Claim at position 3 (depends on 1)

The multi-screen casting system according to claim 1, wherein the second receiving screen is a projector set, including a HDMI interfaced projector and a projector screen.

### Claim at position 4

4-6. (canceled)