High ambient light electronic screen communication method

• US 10,223,626 B2
• Filed: 04/19/2017
• Issued: 03/05/2019
• Est. Priority Date: 04/19/2017
• Status: Active Grant

• Current Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Original Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Inventors: Ackley, H. Sprague, Francou, Damien
• Primary Examiner(s): Marshall, Christie L
• Application Number:
  US15/491,383
• Publication Number:
  US 20180307957A1
• Time in Patent Office: 685 Days
• CPC Class Codes: G06K 19/06028 using bar codes
• CPC Class Codes: G06K 19/06112 the marking being simulated using a light source, e.g. a barcode shown on a display or a laser beam with time-varying intensity profile
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/1095 the scanner comprising adaptations for scanning a record carrier that is displayed on a display-screen or the like
• CPC Class Codes: G06K 7/1413 1D bar codes
• CPC Class Codes: H04L 2101/622 Layer-2 addresses, e.g. medium access control [MAC] addresses
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

The present invention embraces a method to obtain barcoded information off a computer screen under high ambient lighting conditions, including a direct sunlight environment. The method includes a user prompting a computer to present an active window on all or a portion of its screen. The computer generates a communication sequence, comprising information commonly included on a barcode, and displays the communication sequence on the computer screen. After activating the scanner into an alternative or screen mode, the user places the scanner on the active window of the computer screen and the scanner asynchronously receives the communication sequence. The scanner decodes the received communication sequence and obtains encoded information of the computer. The encoded information may include a unique identifier of the computer, such as a MAC address. With the MAC address, the scanner may wirelessly communicate with the computer to exchange other information.

Claims

1. A method of obtaining machine-readable code information with a barcode scanner from a digital display comprising the steps of:

activating a barcode scanner to operate in a first mode;

converting the machine-readable code information into a communication sequence comprising sequential images, wherein each sequential image is defined by at least three colors;

configuring the barcode scanner to operate in a second mode, in case the machine-readable code information is not decoded, to analyze a plurality of images sequentially;

displaying by the digital display the communication sequence;

receiving with the barcode scanner the communication sequence, wherein the barcode scanner captures the sequential images;

converting the captured sequential images back into the machine-readable code information; and

connecting the barcode scanner to a computer using a unique identifier via an electronic communication method.

2. The method according to claim 1, wherein,

the communication sequence comprises a sequence of three optical states including an “

on”

state, an “

off”

state, and an intermediate state, wherein, each optical state represents a different color;

on an active window of the digital display, the “

on”

state is displayed as a white color, the “

off”

state is displayed as a black color, and the intermediate state is displayed as a gray color;

at the “

on”

state or the “

off”

state, the communication sequence transitions to and from the intermediate state; and

at the intermediate state, the communication sequence transitions to and from either the “

on”

state or the “

off”

state.

3. The method according to claim 2, wherein,

the “

on”

state, the “

off”

state or the intermediate state have at least a duration of a barcode scanner frame rate.

4. The method according to claim 2, wherein,

a transition from the intermediate state to the “

on”

or “

off”

state and back to a transition state comprises one bit of information; and

a transmission period for one bit is equal to two times a frame duration plus two times a sum of a rise time plus a fall time.

5. The method according to claim 1, wherein,

the communication sequence is displayed on a portion of a screen of the computer.

6. The method according to claim 1, wherein,

the unique identifier of the computer is a MAC address.

7. The method according to claim 1, wherein,

the electronic communication method utilizes a Bluetooth Low Energy (LE) technology.

8. A system for obtaining machine-readable code information with a barcode scanner from a digital display, the system comprising:

a computer capable of generating a multi-state sequence from the machine-readable code information and presenting the multi-state sequence on the digital display;

the barcode scanner capable of scanning the digital display and receiving the multi-state sequence using out-of-focus asynchronous data transmission, wherein, the barcode scanner converts the multi-state sequence back into the machine-readable code information, and wherein the barcode scanner detects a magnitude of the multi-state sequence by averaging pixels of the digital display and asynchronously communicated with the computer; and

the digital display for displaying the multi-state sequence.

9. The system according to claim 8, wherein,

the multi-state sequence comprises a sequence of three optical states including an “

on”

state, an “

off”

state, and an intermediate state.

10. The system according to claim 9, wherein,

on a screen of the computer, the “

on”

state is displayed as a white color, the “

off”

state is displayed as a black color, and the intermediate state is displayed as a gray color.

11. The system according to claim 9, wherein,

at the “

on”

state or the “

off”

state, the multi-state sequence transitions to and from the intermediate state.

12. The system according to claim 9, wherein,

at the intermediate state, the multi-state sequence transitions to and from either the “

on”

state or the “

off”

state.

13. The system according to claim 9, wherein,

a transition from the intermediate state to the “

on”

or “

off”

state and back to a transition state comprises one bit of information.

14. The system according to claim 9, wherein,

a transmission period for one bit is equal to two times a frame duration plus two times a sum of a rise time plus a fall time.

15. The system according to claim 8, further comprising coupling the barcode scanner to the computer using the machine-readable code information.

16. The system according to claim 8, wherein,

the barcode scanner operates in a direct sunlight environment.

17. The system according to claim 8, wherein,

the multi-state sequence comprises a sequence of more than three optical states.

18. A method of communicating with a computer, comprising:

activating a scanner to operate in a barcode mode;

attempting, by the scanner, to decode a barcode displayed on a computer screen;

if the scanner does not successfully decode the barcode;

changing an operation of the scanner to a screen mode, and

processing a plurality of frames of a communication sequence displayed on the computer screen;

determining, by the scanner, if the communication sequence comprises multiple states in the plurality of frames of the communication sequence;

if the communication sequence comprises multiple states, continuing, by the scanner, to decode the plurality of frames comprising bits of encoded information; and

after receiving and decoding the communication sequence, returning the operation of the scanner to the barcode mode.

19. The method according to claim 18, further comprising:

converting, by the scanner, the bits of encoded information to a unique ID of the computer, and wirelessly connecting to the computer using the unique ID.