MODULE FOR CONTROLLING THE LIGHT EMITTING DEVICE CURRENT FOR SELECTIVE FEEDBACK, APPARATUS AND METHOD FOR DRIVING THE LIGHT EMITTING DEVICE USING IT

• Main Authors: KONG, SEUNG KON, HWANG, BO HYUN, KIM, JUNG HYUN, KWON, JUNG SUN
• Format: Patent
• Language: English; Korean
• Published: 08.03.2011
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PURPOSE: A light emitting diode current control module for selective feedback, and a light emitting diode and an operating method using the same are provided to control a light emitting diode channel current using one light emitting diode current control module, thereby reducing the entire mounting area. CONSTITUTION: An operation mode selecting unit(110) selects an operation mode according to an inputted enable signal level. An enable signal level of the operation mode selecting unit has three signal levels. A channel dividing unit(120) divides a plurality of light emitting diode channels into at least one group by the selected operation mode. A minimum voltage selecting unit(130) selects a light emitting diode channel in which the minimum voltage is detected by comparing voltages detected in a lower part of the light emitting diode channel. A feedback controller(140) transfers the minimum voltage of the light emitting diode channel to a DC/DC converter.