IP Library › Granted Patent US 8,638,288
Granted Patent B2
US 8,638,288 · App. 12/324,149 · Granted Jan 28, 2014

RGB LED backlight color control using adjustable driving current

Inventors: Erin L. Taylor (Pflugerville, TX); John Matthew Knadler, IV (Round Rock, TX)
Assignee: Dell Products L.P.
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 8,638,288
App. No.
12/324,149
Filed
Nov 26, 2008
Granted
Jan 28, 2014
Kind
B2
Art Unit
2697
USPC
345/690
Abstract

A Red, Green, Blue Light Emitting Device (RGB LED) backlight color control system includes an RGB LED backlight comprising a red LED, a green LED, and a blue LED. A driving current regulator is coupled to each of the red LED, the green LED, and the blue LED. A backlight power control is coupled to each of the driving current regulators and operable to receive adjustment data and use the adjustment data to adjust the driving current supplied by at least one of the driving current regulators to at least one of the red LED, the green LED, and the blue LED. By adjusting the driving current supplied to the red LED, green LED, and/or the blue LED, color pallet points on a color triangle (associated with a display that uses the RGB LED backlight) are shifted to achieve the color desired by the user, avoiding the loss of color pallet points in the color triangle that occurs with conventional re-mapping techniques.

Claims (40)

1. A Red, Green, Blue Light Emitting Device (RGB LED) backlight color control system, comprising:

an RGB LED backlight comprising a red LED, a green LED, and a blue LED;

a driving current regulator coupled to each of the red LED, the green LED and the blue LED;

a backlight power control coupled to each of the driving current regulators and operable to receive adjustment data and use the adjustment data to adjust the driving current supplied by at least one of the driving current regulators to at least one of the red LED, the green LED and the blue LED;

a storage coupled to the backlight power control, wherein the storage includes a plurality of executable applications that include at least a word processing executable application, each executable application associated with a different set of adjustment data that is stored in the storage, and wherein a set of the word processing executable application adjustment data is operable to be sent from the storage to the backlight power control in response to detecting the execution of the word processing executable application following the execution of one of the other executable applications such that a plurality of color settings are dynamically changed in response to the detected execution of the word processing executable application.

2. The system of claim 1 , further comprising:

an interface in the backlight power control that comprises a plurality of color offset registers, wherein the backlight power control is operable to write the adjustment data to at least one of the color offset registers to adjust the driving current supplied by at least one of the driving current regulators to at least one of the red LED, the green LED, and the blue LED.

3. The system of claim 1 , wherein the plurality of executable applications include at least a media viewer application, and wherein a set of media viewer executable application adjustment data is operable to be sent from the storage to the backlight power control in response to detecting the execution of the media viewer executable application following the execution of one of the other executable applications such that a plurality of color settings are dynamically changed in response to the detected execution of the media viewer executable application.

4. The system of claim 1 , further comprising:

a display panel coupled to the backlight power control, wherein a color sensor is coupled between the display panel and the backlight power control and operable to provide color feedback to the backlight power control for each of the red LED, green LED, and blue LED.

5. The system of claim 1 , further comprising:

a user interface coupled to the backlight power control and operable by a user to send the adjustment data to the backlight power control.

6. The system of claim 1 , wherein a driver voltage regulator control unit is included in the backlight power control and operable to send a signal to the driving current regulators to adjust the average driving current supplied by at least one of the driving current regulators to at least one of the red LED, the green LED, and the blue LED.

7. The system of claim 1 , wherein a color triangle comprising a plurality of color pallet points is associated with a display that uses the RGB LED backlight, and wherein the adjusting of the driving current supplied by at least one of the driving current regulators to at least one of the red LED, the green LED, and the blue LED results in the shifting of the plurality of color pallet points without a loss of any of the color pallet points.

8. The system of claim 1 , wherein a driver voltage regulator control unit is included in the backlight power control and operable to send a signal to the driving current regulators to adjust the average driving current supplied by at least one of the driving current regulators to at least one of the red LED, the green LED, and the blue LED.

9. The system of claim 1 , wherein a color triangle comprising a plurality of color pallet points is associated with a display that uses the RGB LED backlight, and wherein the adjusting of the driving current supplied by at least one of the driving current regulators to at least one of the red LED, the green LED, and the blue LED results in the shifting of the plurality of color pallet points without a loss of any of the color pallet points.

10. An information handling system, comprising:

a processor;

a display coupled to the processor, the display comprising a RGB LED backlight that includes a red LED, a green LED, and a blue LED;

a driving current regulator coupled to each of the red LED, the green LED, and the blue LED;

a backlight power control coupled to each of the driving current regulators and operable to receive adjustment data and use the adjustment data to adjust the driving current supplied by at least one of the driving current regulators to at least one of the red LED, the green LED, and the blue LED; and

a storage coupled to the backlight power control, wherein the storage includes a plurality of executable application type applications that include at least a media viewer executable application type application, each executable application type application associated with a different set of adjustment data that is stored in the storage, and wherein a set of media viewer executable application type application adjustment data is operable to be sent from the storage to the backlight power control in response to detecting the execution of the media viewer executable application type application following the execution of one of the other executable application type applications such that a plurality of color settings for the display are dynamically changed in response to the detected execution of the media viewer executable application type application.

11. The system of claim 10 , further comprising:

an interface in the backlight power control that comprises a plurality of color offset registers, wherein the backlight power control is operable to write the adjustment data to at least one of the color offset registers to adjust the driving current supplied by at least one of the driving current regulators to at least one of the red LED, the green LED, and the blue LED.

12. The system of claim 10 , wherein the plurality of executable application type applications include at least a word processing executable application type application, and wherein a set of the word processing executable application type application adjustment data is operable to be sent from the storage to the backlight power control in response to detecting the execution of the word processing executable application type application following the execution of one of the other executable application type applications such that a plurality of color settings are dynamically changed in response to the detected execution of the word processing executable application type application.

13. The system of claim 10 , further comprising:

a display panel coupled to the display, wherein a color sensor is coupled between the display panel and the backlight power control and operable to provide color feedback to the backlight power control for each of the red LED, green LED, and blue LED.

14. The system of claim 10 , further comprising:

a user interface coupled to the backlight power control and operable by a user to send the adjustment data to the backlight power control.

15. A method for controlling the color of a display that uses a Red, Green Blue Light Emitting Device (RGB LED) backlight, comprising:

providing a display comprising an RGB LED backlight that includes a red LED, a green LED, and a blue LED;

receiving an instruction to execute a word processing executable type application;

retrieving word processing executable type application adjustment data that is associated with the word processing executable type application;

determining at least one first drive current using the word processing executable type application adjustment data;

applying the at least one first drive current to at least one of the red LED, the green LED, and the blue LED to adjust a color provided by the RGB LED backlight;

receiving an instruction to execute a media viewer application executable type application;

retrieving media viewer application executable type application adjustment data that is associated with the media viewer application executable type application;

determining at least one second drive current using the media viewer application executable type application adjustment data; and

dynamically changing a plurality of color settings for the display by switching from the at least one first drive current to at least one second drive current and applying that at least one second drive current to at least one of the red LED, the green LED, and the blue LED to adjust a color provided by the RGB LED backlight.

16. The method of claim 15 , wherein the determining at least one first drive current using the word processing executable type application adjustment data and the determining the at least one second drive current using the media viewer application executable type application adjustment data comprises writing the word processing executable type application adjustment data and the media viewer application executable type application adjustment data to a color offset register.

Assignments (15)
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (053546/0001) Recorded Jun 23, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC IP HOLDING COMPANY LLC
Reel/Frame 071642/0001 →
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001) Recorded May 20, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.); DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC); EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.); SCALEIO LLC
Reel/Frame 061753/0001 →
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001) Recorded Apr 26, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.); DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC); EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.); SCALEIO LLC
Reel/Frame 061324/0001 →
RELEASE OF SECURITY INTEREST Recorded Nov 3, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL, L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; WYSE TECHNOLOGY L.L.C.
Reel/Frame 058216/0001 →
SECURITY AGREEMENT Recorded Apr 22, 2020
From: CREDANT TECHNOLOGIES INC.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; FORCE10 NETWORKS, INC.; WYSE TECHNOLOGY L.L.C.; EMC IP HOLDING COMPANY LLC
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
Reel/Frame 053546/0001 →
SECURITY AGREEMENT Recorded Mar 21, 2019
From: CREDANT TECHNOLOGIES, INC.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; FORCE10 NETWORKS, INC.; WYSE TECHNOLOGY L.L.C.; EMC IP HOLDING COMPANY LLC
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
Reel/Frame 049452/0223 →
SECURITY AGREEMENT Recorded Sep 21, 2016
From: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; SPANNING CLOUD APPS LLC; WYSE TECHNOLOGY L.L.C.
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
Reel/Frame 040134/0001 →
SECURITY AGREEMENT Recorded Sep 21, 2016
From: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; SPANNING CLOUD APPS LLC; WYSE TECHNOLOGY L.L.C.
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
Reel/Frame 040136/0001 →
RELEASE OF SECURITY INTEREST Recorded Sep 14, 2016
From: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
To: DELL MARKETING L.P.; ASAP SOFTWARE EXPRESS, INC.; APPASSURE SOFTWARE, INC.; COMPELLENT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL INC.; DELL PRODUCTS L.P.; DELL USA L.P.; DELL SOFTWARE INC.; FORCE10 NETWORKS, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
Reel/Frame 040040/0001 →
RELEASE OF SECURITY INTEREST Recorded Sep 14, 2016
From: BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT
To: DELL MARKETING L.P.; ASAP SOFTWARE EXPRESS, INC.; APPASSURE SOFTWARE, INC.; COMPELLENT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL INC.; DELL PRODUCTS L.P.; DELL USA L.P.; DELL SOFTWARE INC.; FORCE10 NETWORKS, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
Reel/Frame 040065/0618 →
RELEASE OF SECURITY INTEREST Recorded Sep 13, 2016
From: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
To: DELL MARKETING L.P.; ASAP SOFTWARE EXPRESS, INC.; APPASSURE SOFTWARE, INC.; COMPELLANT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL INC.; DELL PRODUCTS L.P.; DELL USA L.P.; DELL SOFTWARE INC.; FORCE10 NETWORKS, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
Reel/Frame 040065/0216 →
PATENT SECURITY AGREEMENT (ABL) Recorded Jan 2, 2014
From: DELL INC.; APPASSURE SOFTWARE, INC.; ASAP SOFTWARE EXPRESS, INC.; BOOMI, INC.; COMPELLENT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL USA L.P.; FORCE10 NETWORKS, INC.; GALE TECHNOLOGIES, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 031898/0001 →
PATENT SECURITY AGREEMENT (TERM LOAN) Recorded Jan 2, 2014
From: DELL INC.; APPASSURE SOFTWARE, INC.; ASAP SOFTWARE EXPRESS, INC.; BOOMI, INC.; COMPELLENT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL USA L.P.; FORCE10 NETWORKS, INC.; GALE TECHNOLOGIES, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
To: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Reel/Frame 031899/0261 →
PATENT SECURITY AGREEMENT (NOTES) Recorded Jan 2, 2014
From: APPASSURE SOFTWARE, INC.; ASAP SOFTWARE EXPRESS, INC.; BOOMI, INC.; COMPELLENT TECHNOLOGIES, INC.; CREDANT TECHNOLOGIES, INC.; DELL INC.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL USA L.P.; FORCE10 NETWORKS, INC.; GALE TECHNOLOGIES, INC.; PEROT SYSTEMS CORPORATION; SECUREWORKS, INC.; WYSE TECHNOLOGY L.L.C.
To: BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS FIRST LIEN COLLATERAL AGENT
Reel/Frame 031897/0348 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 26, 2008
From: TAYLOR, ERIN L.; KNADLER, JOHN MATTHEW, IV
To: DELL PRODUCTS L.P.
Reel/Frame 021896/0395 →
Continuity (1)
Related Publication 20100128064A1 · May 27, 2010