TW200718285A - A control circuit and a controller for a light-emitting unit - Google Patents

A control circuit and a controller for a light-emitting unit

Info

Publication number
TW200718285A
TW200718285A TW094136421A TW94136421A TW200718285A TW 200718285 A TW200718285 A TW 200718285A TW 094136421 A TW094136421 A TW 094136421A TW 94136421 A TW94136421 A TW 94136421A TW 200718285 A TW200718285 A TW 200718285A
Authority
TW
Taiwan
Prior art keywords
light
emitting unit
unit
current
controller
Prior art date
Application number
TW094136421A
Other languages
Chinese (zh)
Other versions
TWI308034B (en
Inventor
Ta-Yung Yang
Original Assignee
System General Corp
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 as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by System General Corp filed Critical System General Corp
Priority to TW94136421A priority Critical patent/TWI308034B/en
Publication of TW200718285A publication Critical patent/TW200718285A/en
Application granted granted Critical
Publication of TWI308034B publication Critical patent/TWI308034B/en

Links

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

A control circuit and a controller for a light-emitting unit are proposed. The control circuit includes an energy-storing unit connected in series with the light-emitting unit; a discharging unit connected in parallel with the energy-storing unit and the light-emitting unit; a switch connected in series with the energy-storing unit and the light-emitting unit; and a current-sense unit connected in series with the switch. The current-sense unit generates a current-sense signal in response to the operation current of the light-emitting unit. In response to the current-sense signal, the controller is connected to the current-sense unit and the switch to generate a control signal for controlling the switch. Therefore, the brightness of the light-emitting unit can be properly regulated.
TW94136421A 2005-10-18 2005-10-18 A control circuit and a controller for a light-emitting unit TWI308034B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW94136421A TWI308034B (en) 2005-10-18 2005-10-18 A control circuit and a controller for a light-emitting unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW94136421A TWI308034B (en) 2005-10-18 2005-10-18 A control circuit and a controller for a light-emitting unit

Publications (2)

Publication Number Publication Date
TW200718285A true TW200718285A (en) 2007-05-01
TWI308034B TWI308034B (en) 2009-03-21

Family

ID=45071738

Family Applications (1)

Application Number Title Priority Date Filing Date
TW94136421A TWI308034B (en) 2005-10-18 2005-10-18 A control circuit and a controller for a light-emitting unit

Country Status (1)

Country Link
TW (1) TWI308034B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI394485B (en) * 2008-06-18 2013-04-21 Ite Tech Inc Light-emitting device driving circuit and method thereof
TWI398187B (en) * 2009-06-30 2013-06-01 Hon Hai Prec Ind Co Ltd Controlling circuit for led

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI394485B (en) * 2008-06-18 2013-04-21 Ite Tech Inc Light-emitting device driving circuit and method thereof
TWI398187B (en) * 2009-06-30 2013-06-01 Hon Hai Prec Ind Co Ltd Controlling circuit for led

Also Published As

Publication number Publication date
TWI308034B (en) 2009-03-21

Similar Documents

Publication Publication Date Title
TW200737070A (en) Voltage controlled backlight driver
WO2007130348A3 (en) Circuit and methodology for supplying pulsed current to a load, such as a light emitting diode
WO2009063984A1 (en) Illumination device and illumination apparatus using the same
WO2007021935A3 (en) Apparatus and method for driving light-emitting diodes (leds)
TW200721650A (en) Method of forming a buck-boost mode power supply controller and structure therefor
WO2012052875A3 (en) Led retrofit lamp
TW200719771A (en) Luminescence control circuit, and lighting device and portable information terminal equipped therewith
TW200632609A (en) Method for controlling boost circuit
IN2012DE00358A (en)
WO2012083222A3 (en) Switching parameter based discontinuous mode-critical conduction mode transition
EP1988625A3 (en) Power supply apparatus having multiple outputs
WO2011021850A3 (en) Led driving circuit
TW200710784A (en) Systems and methods for generating reference voltages
TW200723860A (en) Video and audio system capable of saving electric power
JP2006271194A5 (en)
GB2490420B (en) Power factor correction
TW200625754A (en) Current control circuitry and methodology for controlling current from current source
EP2712272A3 (en) Power supply device and luminaire
HK1090759A1 (en) A switch circuit, integrated circuit and switch apparatus for controlling the supply of electrical power from an electrical power source to a load
EP2259660A3 (en) Electronic ballast control circuit
TW200718285A (en) A control circuit and a controller for a light-emitting unit
TW200700955A (en) Bandgap reference circuit
RU2011142218A (en) LIGHTING CONTROL DEVICE AND LIGHTING CONTROL MODULE
DK1913618T3 (en) Switch
EP2302467A3 (en) Image Forming Apparatus and Control Method Thereof