# US 9,439,230 B2 · Connection method and mobile device for wireless display

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,439,230 B2
- Document ID: US9439230B2
- Status: Granted
- Kind: B2
- Application number: 14/891,346
- Filed: 2015-03-27
- Published: 2016-06-23
- Granted: 2016-09-06
- Earliest claimed: 2014-08-01
- Assignees: Huizhou Tcl Mobile Communication Co., Ltd.
- Applicants: Huizhou TCL Mobile Communication Co., Ltd.
- Inventors: Minli Luo
- Web page: https://patentgrep.com/patent/US9439230B2

## CPC

- H04L 61/00: Network arrangements, protocols or services for addressing or naming
- H04W 76/14: Direct-mode setup
- G06K 7/10722: {Photodetector array or CCD scanning}
- G06K 7/1417: {2D bar codes}
- H04M 1/72412: using two-way short-range wireless interfaces
- G06K 2007/10524: {Hand-held scanners}
- H04L 2101/622: Layer-2 addresses, e.g. medium access control [MAC] addresses
- H04M 2250/06: including a wireless LAN interface
- H04M 2250/16: including more than one display unit
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)

## Abstract

A connection method for wireless display is provided. The connection method includes: activating by a mobile device an application program; acquiring by the mobile device a two-dimensional barcode image; determining by the mobile device whether the two-dimensional barcode image is identical with a prestored image, if not, processing the two-dimensional barcode image to obtain a WiFi MAC address; determining by the mobile device whether the format of the WiFi MAC address is correct, if so, storing the two-dimensional barcode image and its corresponding WiFi MAC address; broadcasting by the mobile device the WiFi MAC address to a WiFi display module of the mobile device, and establishing a data connection with the WiFi display module via the WiFi MAC address; performing data transmission by the mobile device with the display device. By the above means, the present disclosure can effectively improve the connection efficiency between the mobile device and the display device and can thus greatly enhance the user experience.

## Claims

### Claim 1

A connection method for wireless display, comprising:
activating, by a mobile device, an application program, wherein a camera of the mobile device is turned on concurrently when the application program is activated;
scanning, by the mobile device via the camera, a two-dimensional barcode image displayed on a screen of a display device and thus acquiring the two-dimensional barcode image, wherein the two-dimensional barcode image is recorded with a WiFi MAC address of the display device;
determining, by the mobile device, whether the two-dimensional barcode image is identical with a prestored image, if not, processing the two-dimensional barcode image to acquire the WiFi MAC address;
further determining by the mobile device whether a format of the WiFi MAC address is correct, when it is correct, storing the two-dimensional barcode image and its corresponding WiFi MAC address;
broadcasting, by the mobile device, the WiFi MAC address to a WiFi display module of the mobile device, and establishing a data connection by the WiFi display module with the display device via the WiFi MAC address;
determining, by the mobile device, whether signal strength of current WiFi network is greater than a predetermined value; and
when the signal strength of the current WiFi network is determined to be greater than the predetermined value, performing data transmission by the mobile device with the display device;
when the two-dimensional barcode image is determined to be identical with the prestored image, acquiring the WiFi MAC address corresponding to the prestored image, and establishing a data connection by the WiFi display module with the display device via the WiFi MAC address.

### Claim 2 (depends on 1)

The connection method according to claim 1, wherein the processing the two-dimensional barcode image to acquire the WiFi MAC address comprises:
applying binarization processing on the two-dimensional barcode image to acquire a plurality of binary values;
searching for positioning symbols and correction symbols in the plurality of binary values;
according to the positioning symbols and the correction symbols, performing image transformation on the plurality of binary values to generate a symbol code matrix;
decoding the symbol code matrix conforming to coding standards, and acquiring parsed data comprising the WiFi MAC address when the decoding is completed.

### Claim 3 (depends on 1)

The connection method according to claim 1, wherein the performing the data transmission by the mobile device with the display device comprises:
transmitting by the mobile device image data displayed on a screen of the mobile device to the display device, enabling the display device to display on its screen an image corresponding to the image data.

### Claim 4 (depends on 1)

The connection method according to claim 1, wherein the performing the data transmission by the mobile device with the display device comprises:
acquiring, by the mobile device, image data displayed on the screen of the display device, and displaying on the screen of the mobile device an image corresponding to the image data.

### Claim 5 (depends on 1)

The connection method according to claim 1, further comprising:
when the mobile device determines that the signal strength of the current WiFi network is smaller than the predetermined value, disconnecting by the mobile device the connection with the display device.

### Claim 6 (depends on 5)

The connection method according to claim 5, wherein the predetermined value is −70 dbm.

### Claim 7 (depends on 1)

The connection method according to claim 1, further comprising:
when the mobile device determines that the two-dimensional barcode image and the prestored image have more than two-thirds in common, the two-dimensional barcode image is determined to be the same with the prestored image.

### Claim 8 (depends on 1)

The connection method according to claim 1, further comprising:
when the mobile device determines that the format of the WiFi MAC address is not correct, re-scanning by the mobile device the two-dimensional barcode image displayed on the screen of the display device.

### Claim 9

A connection method for wireless display, comprising:
activating, by a mobile device, an application program, wherein a camera of the mobile device is turned on concurrently when the application program is activated;
scanning, by the mobile device via the camera, a two-dimensional barcode image displayed on a screen of a display device and thus acquiring the two-dimensional barcode image, wherein the two-dimensional barcode image is recorded with a WiFi MAC address of the display device;
determining by the mobile device whether the two-dimensional barcode image is identical with a prestored image, if not, processing the two-dimensional barcode image to acquire the WiFi MAC address;
further determining by the mobile device whether a format of the WiFi MAC address is correct, when it is correct, storing the two-dimensional barcode image and its corresponding WiFi MAC address;
broadcasting by the mobile device the WiFi MAC address to a WiFi display module of the mobile device, and establishing a data connection by the WiFi display module with the display device via the WiFi MAC address; and
performing data transmission by the mobile device with the display device.

### Claim 10 (depends on 9)

The connection method according to claim 9, further comprising:
when the two-dimensional barcode image is determined to be identical with the prestored image, acquiring the WiFi MAC address corresponding to the prestored image, and establishing a data connection by the WiFi display module with the display device via the WiFi MAC address.

### Claim 11 (depends on 9)

The connection method according to claim 9, wherein the processing the two-dimensional barcode image to acquire the WiFi MAC address comprises:
applying binarization processing on the two-dimensional barcode image to acquire a plurality of binary values;
searching for positioning symbols and correction symbols in the plurality of binary values;
according to the positioning symbols and the correction symbols, performing image transformation on the plurality of binary values to generate a symbol code matrix;
decoding the symbol code matrix conforming to coding standards, and acquiring parsed data comprising the WiFi MAC address when the decoding is completed.

### Claim 12 (depends on 9)

The connection method according to claim 9, wherein the performing the data transmission by the mobile device with the display device comprises:
transmitting by the mobile device image data displayed on a screen of the mobile device to the display device, enabling the display device to display on its screen an image corresponding to the image data.

### Claim 13 (depends on 9)

The connection method according to claim 9, wherein the performing the data transmission by the mobile device with the display device comprises:
acquiring, by the mobile device, image data displayed on the screen of the display device, and displaying on a screen of the mobile device an image corresponding to the image data.

### Claim 14 (depends on 9)

The connection method according to claim 9, further comprising:
when the mobile device determines that the two-dimensional barcode image and the prestored image have more than two-thirds in common, the two-dimensional barcode image is determined to be the same with the prestored image.

### Claim 15 (depends on 9)

The connection method according to claim 9, further comprising:
when the mobile device determines that the format of the WiFi MAC address is not correct, re-scanning by the mobile device the two-dimensional barcode image displayed on the screen of the display device.

### Claim 16

A mobile device, comprising:
a processor; and
a non-transitory program storage medium, comprising:
an application program module, configured to activate an application program, wherein a camera of the mobile device is turned on concurrently when the application program is activated;
an image acquisition module connected to the application program module, being configured to scan via the camera a two-dimensional barcode image displayed on a screen of a display device and thus acquire the two-dimensional barcode image, wherein the two-dimensional barcode image is recorded with a WiFi MAC address of the display device;
an image determination module connected to the image acquisition module, being configured to determine whether the two-dimensional barcode image is identical with a prestored image;
an address acquisition module connected to the image determination module, being configured to, when the image determination module determines that the two-dimensional barcode image is not identical with the prestored image, process the two-dimensional barcode image to acquire the WiFi MAC address;
an address format determination module connected to the address acquisition module, being configured to determine whether a format of the WiFi MAC address is correct;
a storage module connected to the address format determination module, being configured to, when the address format determination module determines that the format of the WiFi MAC address is correct, store the two-dimensional barcode image and its corresponding WiFi MAC address;
a data broadcasting module connected to the storage module, being configured to broadcast the WiFi MAC address to a WiFi display module of the mobile device;
the WiFi display module, which is connected to the data broadcasting module, being configured to establish a data connection with the display device via the WiFi MAC address; and
a data transmission module connected to the WiFi display module, being configured to, when the WiFi display module completes the data connection with the display device via the WiFi MAC address, perform data transmission between the mobile device and the display device.

### Claim 17 (depends on 16)

The mobile device according to claim 16, wherein, the address acquisition module is configured to, when the image determination module determines that the two-dimensional barcode image is identical with the prestored image, acquire the WiFi MAC address corresponding to the prestored image, enabling the WiFi display module to establish the data connection with the display device via the WiFi MAC address.

### Claim 18 (depends on 16)

The mobile device according to claim 16, wherein the address acquisition module comprises:
a binarization unit, configured to apply binarization processing on the two-dimensional barcode image to acquire a plurality of binary values;
a symbol searching unit connected to the binarization unit, being configured to search for positioning symbols and correction symbols in the plurality of binary values;
an image transformation unit connected to the symbol searching unit, being configured to apply image transformation on the plurality of binary values according to the positioning symbols and the correction symbols, so as to generate a symbol code matrix; and
a decoding unit connected to the image transformation unit, being configured to decode the symbol code matrix conforming to coding standards, and to acquire parsed data containing the WiFi MAC address when the decoding is completed.

### Claim 19 (depends on 16)

The mobile device according to claim 16, wherein, the data transmission module transmits image data displayed on a screen of the mobile device to the display device, enabling the display device to display on its screen an image corresponding to the image data.

### Claim 20 (depends on 16)

The mobile device according to claim 16, wherein, the data transmission module acquires image data displayed on the screen of the display device, and displays on the screen of the mobile device an image corresponding to the image data.