H05B45/12- Controlling the intensity of the light using optical feedback.H05B45/10- Controlling the intensity of the light.H05B45/00- Circuit arrangements for operating light emitting diodes.H05B- ELECTRIC HEATING ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL.H05- ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR.Assignors: CHIANG, CHINN-CHANN Publication of US20090015175A1 publication Critical patent/US20090015175A1/en Status Abandoned legal-status Critical Current Links ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). reassignment DIGITEK TECHNOLOGY CO., LTD. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Digitek Technology Co Ltd filed Critical Digitek Technology Co Ltd Priority to US11/826,233 priority Critical patent/US20090015175A1/en Assigned to DIGITEK TECHNOLOGY CO., LTD. Original Assignee Digitek Technology Co Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Abandoned Application number US11/826,233 Inventor Chinn-Chann Chiang Current Assignee (The listed assignees may be inaccurate. Google Patents Brightness control system for LED lighting devicesÄownload PDF Info Publication number US20090015175A1 US20090015175A1 US11/826,233 US82623307A US2009015175A1 US 20090015175 A1 US20090015175 A1 US 20090015175A1 US 82623307 A US82623307 A US 82623307A US 2009015175 A1 US2009015175 A1 US 2009015175A1 Authority US United States Prior art keywords brightness controller led lighting lighting device infrared Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US20090015175A1 - Brightness control system for LED lighting devices UL 2749 OUTLINE - Outline of investigation for seasonal use led drivers and non-integral led lighting strings.US20090015175A1 - Brightness control system for LED lighting devices NEMA SSL 1 - Electronic drivers for led devices, arrays, or systems. Other LED drivers are used in DVD and MP3 players. In terms of applications, some LED drivers are used in portable devices such as cell phones, digital cameras, digital clocks, and counters. TTL is an acronym for transistor-transistor logic. Typically, an LED display driver is TTL compatible, provides wide power supply operation, and can handle 15mA current. For example, an LED display driver has one pin that provides continuous brightness control by setting a reference current through a variable resistor. Specialized products are commonly available. LED drivers are designed and manufactured to meet most industry specifications. A 7 segment led driver often includes an input latch which can display and hold digits at the time a new count accumulates in the background.
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