Bidirectional Illuminated LED Bead Triggered by Power Line Pulse Signals
US-2024422877-A1 · Dec 19, 2024 · US
Display backlight driver IC configuration
US8933643B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8933643-B2 |
| Application number | US-201213659888-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 24, 2012 |
| Priority date | Apr 20, 2012 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
One embodiment of a display backlight driver integrated circuit can be configured for operation in at least two different ways. A first method transfers data from an EEPROM to hardware registers prior to regular operation. A second method also transfers data from an EEPROM to registers. However, hardware registers can be overwritten with data accepted from a control bus, prior to regular operation. A keyboard driver IC can detect the presence or absence of a cable to an LED. If the cable is absent, the driver IC will not supply power for the LED. One embodiment of a keyboard and display backlight control system can be configured to allow substantially independent operation.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for configuring a light emitting diode (LED) controller for use in a computing device, the method comprising: detecting a power on reset event when a supply power for the LED controller transitions from zero volts to an operating voltage; prior to enabling LED operation, copying a first set of data from a memory located within the LED controller to LED operational control registers in response to detecting the power on reset event, wherein the fir…
Assignees
Inventors
Classifications
Electricity · mapped topic
- H05B45/325Primary
Electricity · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8933643B2 cover?
- One embodiment of a display backlight driver integrated circuit can be configured for operation in at least two different ways. A first method transfers data from an EEPROM to hardware registers prior to regular operation. A second method also transfers data from an EEPROM to registers. However, hardware registers can be overwritten with data accepted from a control bus, prior to regular operat…
- Who is the assignee on this patent?
- Apple Inc
- What technology area does this patent fall under?
- Primary CPC classification H05B45/325. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 13 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).