# US 2014/0152635 A1 · Systems and methods for powering display boards

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- Number: US 2014/0152635 A1
- Document ID: US20140152635A1
- Status: Published application
- Kind: A1
- Application number: 13/692,491
- Filed: 2012-12-03
- Published: 2014-06-05
- Earliest claimed: 2012-12-01
- Assignees: LSI Industries, Inc.
- Applicants: Lsi Industries, Inc.
- Inventors: Marc Morrisseau
- Web page: https://patentgrep.com/patent/US20140152635A1

## CPC

- G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED]
- G06F 3/1446: {display composed of modules, e.g. video walls}
- G06F 13/426: {using an embedded synchronisation, e.g. Firewire bus, Fibre Channel bus, SSA bus}
- H04N 5/66: Transforming electric information into light information (scanning details H04N3/00)
- G09G 2330/025: Reduction of instantaneous peaks of current
- Y02D 10/00: Energy efficient computing, e.g. low power processors, power management or thermal management
- 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)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

Systems and methods are described for providing data to the multiple LED blocks of a LED display board. Each LED block can include an electrical connection or interface that has a reduced complexity compared with prior LED display boards. Six pins may be used for the connections between blocks—including a ground pin, an input/output (I/O) pin, two video link pins, and two communication link pins. Systems and methods are described for controlling the power supplied to LED block(s) of a LED display board. A power controller coordinates the supply of power to the LED blocks. The power controller controls the supply of power to selected groups of the blocks of a video board in a way to reduce the differences in peak instantaneous power supplied to sections of the display board or the entire display board itself, and thereby increase the useful service life of the power supply components.

## Claims

### Claim 1

A computer-implemented method for providing power to one or more LED blocks, the method comprising:
splitting the one or more LED blocks into plural sections;
powering a first section from among the plural sections according to a first periodic step function;
for each other section from among the plural sections, powering the other section according to a function corresponding to the other section, the function corresponding to the other section being a time-shifted version of the first periodic step function, wherein no two sections from among the plural sections correspond to an identical function.

### Claim 2 (depends on 1)

The method of claim 1, wherein, at a first time, power is provided to each section from among the plural sections, wherein, at a second time, power is provided to no section from among the plural sections and wherein a time difference between the first time and the second time is half a period of the first periodic step function.

### Claim 3 (depends on 1)

The method of claim 1, wherein the plural sections comprise four sections.

### Claim 4 (depends on 3)

The method of claim 3, wherein a time shift between the first section of the four sections and a second section of the four sections is equal to a time shift between the second section and a third section of the four sections and to a time shift between the third section and a fourth section of the four sections.

### Claim 5 (depends on 4)

The method of claim 4, wherein the time shift between the first section of the four sections and a second section of the four sections is shorter than a time for which an image needs to be presented to be perceived by a human.

### Claim 6 (depends on 1)

The method of claim 1, wherein each of the one or more LED blocks has a corresponding power source.

### Claim 7 (depends on 1)

The method of claim 1, wherein at least two of the one or more LED blocks share a single power source.

### Claim 8

A non-transitory computer-readable medium for providing power to one or more LED blocks, the computer-readable medium comprising instructions for:
splitting the one or more LED blocks into plural sections;
powering a first section from among the plural sections according to a first periodic step function;
for each other section from among the plural sections, powering the other section according to a function corresponding to the other section, the function corresponding to the other section being a time-shifted version of the first periodic step function, wherein no two sections from among the plural sections correspond to an identical function.

### Claim 9 (depends on 8)

The computer-readable medium of claim 8, wherein, at a first time, power is provided to each section from among the plural sections, wherein, at a second time, power is provided to no section from among the plural sections and wherein a time difference between the first time and the second time is half a period of the first periodic step function.

### Claim 10 (depends on 8)

The computer-readable medium of claim 8, wherein the plural sections comprise four sections.

### Claim 11 (depends on 10)

The computer-readable medium of claim 10, wherein a time shift between the first section of the four sections and a second section of the four sections is equal to a time shift between the second section and a third section of the four sections and to a time shift between the third section and a fourth section of the four sections.

### Claim 12 (depends on 11)

The computer-readable medium of claim 11, wherein the time shift between the first section of the four sections and a second section of the four sections is shorter than a time for which an image needs to be presented to be perceived by a human.

### Claim 13 (depends on 8)

The computer-readable medium of claim 8, wherein each of the one or more LED blocks has a corresponding power source.

### Claim 14 (depends on 8)

The computer-readable medium of claim 8, wherein at least two of the one or more LED blocks share a single power source.

### Claim 15

A system for providing power, the system comprising:
one or more LED blocks;
a power supply;
processing hardware operative to implement instructions stored in a computer-readable medium, and
the computer-readable medium comprising the instructions for:
splitting the one or more LED blocks into plural sections;
powering, using the power supply, a first section from among the plural sections according to a first periodic step function;
for each other section from among the plural sections, powering, using the power supply, the other section according to a function corresponding to the other section, the function corresponding to the other section being a time-shifted version of the first periodic step function, wherein no two sections from among the plural sections correspond to an identical function.

### Claim 16 (depends on 15)

The system of claim 15, wherein, at a first time, power is provided to each section from among the plural sections, wherein, at a second time, power is provided to no section from among the plural sections and wherein a time difference between the first time and the second time is half a period of the first periodic step function.

### Claim 17 (depends on 15)

The system of claim 15, wherein the plural sections comprise four sections.

### Claim 18 (depends on 17)

The system of claim 17, wherein a time shift between the first section of the four sections and a second section of the four sections is equal to a time shift between the second section and a third section of the four sections and to a time shift between the third section and a fourth section of the four sections.

### Claim 19 (depends on 18)

The system of claim 18, wherein the time shift between the first section of the four sections and a second section of the four sections is shorter than a time for which an image needs to be presented to be perceived by a human.

### Claim 20 (depends on 15)

The system of claim 15, wherein each of the one or more LED blocks has a corresponding power source.

### Claim 21 (depends on 15)

The system of claim 15, wherein at least two of the one or more LED blocks share a single power source.