Title:
カラーLEDバックライトのドライブ装置
Document Type and Number:
Japanese Patent JP4503004
Kind Code:
B2
Abstract:
Disclosed herein is a drive device of a color light emitting diode (LED) backlight, which is capable of precisely adjusting the forward voltages of color LED arrays for each channel. The drive device for driving the color light emitting diode (LED) backlight which includes a plurality of color LED arrays includes an I/O interface for inputting/outputting a signal, a control unit for controlling a driving voltage and driving current according to a brightness control signal output from the I/O interface, a DC/DC converter for converting an operation voltage into the driving voltage according to the driving voltage control of the control unit, a voltage regulator for regulating the driving voltage output from the DC/DC converter to a reference voltage without ripple, a multi-channel driving unit for converting the reference voltage output from the voltage regulator into forward voltages of the plurality of color LED arrays according to a plurality of control signals, and a current source for adjusting the amount of the driving current flowing in the color LED backlight according to the driving current control of the control unit.
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Inventors:
Masaru Kawa
Satoshi Sou
Minoru Hei cloud
Satoshi Sou
Minoru Hei cloud
Application Number:
JP2006323261A
Publication Date:
July 14, 2010
Filing Date:
November 30, 2006
Export Citation:
Assignee:
Samsung Electric Co., Ltd.
International Classes:
H05B37/02; G02F1/133; H01L33/00
Domestic Patent References:
| JP2003241714A |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Masakazu Ito
Yuko Hara
Masakazu Ito
Yuko Hara