PatentsDB

Load-aware compensation in light-emitting-diode backlight illumination systems

US9064461B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-9064461-B2
Application numberUS-201314076899-A
CountryUS
Kind codeB2
Filing dateNov 11, 2013
Priority dateApr 30, 2010
Publication dateJun 23, 2015
Grant dateJun 23, 2015

How to read this patent

A practical reading order for non-experts. Skip the full description unless you need deep technical detail.

  1. Title

    What the patent document calls the invention.

  2. Abstract

    A short plain-language summary of the technical disclosure.

  3. Assignees and inventors

    Who owns or filed the patent and who is credited as inventor.

  4. Key dates

    Filing, priority, publication, and grant dates set the timeline.

  5. First independent claim

    The legal scope of protection — read this for what is actually claimed.

  6. CPC / IPC classifications

    Technology tags used to group this patent with similar filings.

  7. Citations and related patents

    Prior art links and similar publications in this corpus.

Abstract

Official abstract text for this publication.

System(s) and method(s) are provided for power management in an electronic display via compensation of a power source of a light-emitting-diode (LED) backlighting system. A compensation feedback loop includes a load-aware controller that receives the bad condition from a dimming controller and supplies a control signal to the power source. An efficiency regulator functionally connected the backlight circuitry closes the compensation, feedback loop and provides an input signal to the load-aware controller. The dimming controller implements phase-shifted pulse-modulation dimming, which based on duty cycle can establish a dimming equilibrium with two load conditions. The load aware controller includes a set of compensation blocks arranged in parallel, with a single compensation block connected to the input signal and that provides the control signal. A selector component in the load aware controller determines a compensation block to be connected to the compensation feedback loop based on the received load condition.

First claim

Opening claim text (preview).

What is claimed is: 1. An illumination system, comprising: illumination circuitry comprising a plurality of strings of one or more LEDs; an efficiency regulator configured to provide an offset value based on one or more string voltages of one or more strings of the plurality of strings and a voltage supplied to the illumination circuitry; an error circuit configured to provide an error value based on a difference between the offset value and the voltage supplied to the illumin…

Assignees

Inventors

Classifications

Patent family

Related publications grouped by family.

View patent family 44857913

External sources

Next steps

Free tools are coming soon. Tell us what you want to track and we'll notify you.

Get alerts for this patentView on Google Patents

Request deeper analysis

Frequently asked questions

Answers are generated from the same data shown on this page.

What does patent US9064461B2 cover?
System(s) and method(s) are provided for power management in an electronic display via compensation of a power source of a light-emitting-diode (LED) backlighting system. A compensation feedback loop includes a load-aware controller that receives the bad condition from a dimming controller and supplies a control signal to the power source. An efficiency regulator functionally connected the back…
Who is the assignee on this patent?
Atmel Corp
What technology area does this patent fall under?
Primary CPC classification G09G3/342. Mapped technology areas include Physics.
When was this patent published?
Publication date Tue Jun 23 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).