Silicon Works Co., Ltd.

Samsung Electronics Co., Ltd.

Global Technologies Co., Ltd.

Yong Geun Kim

Ki Chul An

Sang Young Lee

Gyeong Sik Mun

Min Seon Kim

Kyung Rok Kim

Hyun Surk Kim

Ho Sub Lim

Young Suk Son

Yong Goo Kim

Dong Il Kim

Won Ji Lee

Ki Soo Kwon

Eun Ji Jo

Jung Hee Seo

Jin Seok Hong

Yun Hee Ra

Proposed are a backlight device for display and a current control integrated circuit therefor, the current control integrated circuit includes a plurality of driving current control units sharing a column signal for backlight and controlling driving currents of a predetermined number of light-emitting diode channels belonging to the same control group, wherein the plurality of the driving current control units receive the column signal for the control group and the zoom control signal in a shared manner and sequentially receive row signals, respectively, and wherein each of the plurality of driving current control units generates the sampling voltage that results from sampling the column signal using the row signal, and controls the driving current for light emission from the light-emitting diode channel using the sampling voltage, thereby enabling a gain for conversion of the driving current by the sampling voltage to be controlled with the zoom control signal.

Backlight device for display and current control integrated circuit thereof

A current control integrated circuit of a backlight device for display includes a buffer configured to receive a column signal; a plurality of driving current controllers configured to receive the column signal outputted from the buffer and row signals corresponding to a plurality of light emitting blocks of a control unit, and control driving currents for light emission of the light emitting blocks, in response to the column signal and the row signals; and a memory unit, wherein an offset voltage of the buffer is controlled by offset correction data stored in the memory unit.

Current control integrated circuit of backlight device for display

The present disclosure discloses a backlight apparatus for a display and a current control integrated circuit thereof. The backlight apparatus includes a backlight panel including light-emitting diode (LED) channels having a matrix structure and divided into a plurality of control units, a column driver configured to provide, in a horizontal period unit, column signals corresponding to columns of the LED channels, a row driver configured to provide, in a frame unit, row signals corresponding to rows of the LED channels and to sequentially provide the row signals in the horizontal period included in the frame, and current control integrated circuits disposed in the backlight panel in a way to correspond to the control units, respectively, and each configured to receive the column signal and the row signals corresponding to LED channels of the control unit and to control emission of the LED channels of the control unit.

Backlight apparatus for display

A communication device includes a first client group in a first region; a second client group in a second region different from the first region; a first data hub configured to generate first burst data and a first control packet based on first client data received from the first client group; a second data hub configured to generate second burst data and a second control packet based on second client data received from the second client group; and a data transfer unit connected to the first data hub and the second data hub via a control protocol, the data transfer unit configured to, store the first burst data in a target memory based on the first control packet, and store the second burst data in the target memory based on the second control packet.

Communication device including plurality of clients

Backlight apparatus for display and current control integrated circuit thereof

Disclosed is an LED lighting apparatus. The LED lighting apparatus may include a leakage current control unit configured to provide a leakage current path when a rectified voltage is retained at a predetermined voltage or less for a preset time or more, and a leakage current and retention current may be discharged through a leakage current path.

LED lighting apparatus

Provided is a lighting apparatus. The lighting apparatus may include two or more lighting units each including a plurality of LED groups which sequentially emit light in response to changes of a rectified voltage. The two or more lighting units may include one or more LED groups having the same light emitting sequence but having different light emitting points of time. Thus, current harmonic can be reduced, and power efficiency can be improved.

Disclosed is a control circuit of an LED lighting apparatus, capable of reducing total harmonic distortion (THD). The control circuit may include a THD reduction circuit configured to control a driving current on a current path corresponding to light emission of an LED group in response to a change of a rectified voltage.

Control circuit and method of LED lighting apparatus

Disclosed is a lighting apparatus using an LED as a light source. The lighting apparatus may connect first and second lighting units in series or parallel according to a rectified voltage, change one or more of first and second driving currents corresponding to light emissions of the first and second lighting units, and have the universality for rectified voltages.

Lighting apparatus

Disclosed is an LED lighting apparatus capable of performing lighting using a rectified voltage. The LED lighting apparatus may include a lamp divided into a plurality of light emitting modules, and perform lighting using a voltage obtained by lowering a rectified voltage, thereby preventing internal parts from being damaged by a surge voltage. Furthermore, the structure in which LED groups are arranged on a substrate can be improved to uniformize the light intensity.

Light emitting diode lighting device

Disclosed are a control circuit and a voltage generation method of an LED lighting apparatus which provides lighting using a rectified voltage. Light emission of the LED lighting apparatus can be implemented through current regulation, a rectified voltage used for light emission can be used to provide a constant voltage required for a peripheral circuit, and a current flowing through a current path formed by the current regulation can be controlled to perform dimming.

Control circuit and method for generating voltage for light emitting diode lighting device

The present invention discloses a dimming regulation circuit which stabilizes a rectified voltage in response to an unstable output voltage of a dimmer and a lighting apparatus including the dimming regulation circuit. The dimming regulation circuit stabilizes the rectified voltage and provides the stabilized rectified voltage to a lamp, when a rectified voltage corresponds to a preset stabilization required range.

Lighting apparatus and dimming regulation circuit thereof

Disclosed is a control circuit of an LED lighting apparatus which is capable of improving power efficiency. The control circuit controls light emission of one or more LED groups in response to changes of a rectified voltage, and includes a current source configured to provide a primary current using a driving current outputted through a current path of a driver and a secondary current using a rectified current provided to a plurality of LED groups. Thus, the control circuit can perform a charging operation using a current provided from the current source, and provide a charge voltage to an additional device.

Control circuit for LED lighting apparatus

Provided is an LED lighting apparatus with an improved heat radiation property, which is capable of effectively radiating heat generated therein. The LED lighting apparatus may include: a light source unit comprising a plurality of LED groups each having one or more LEDs; and a driving unit configured to provide a current path corresponding to light emission of the light source unit. The light source unit and the driving unit may be arranged on the same substrate so as to be separated from each other. Among the plurality of LED groups, the LED group having the largest heat value may be arranged farthest away from the driving unit, compared to the other LED groups. Through the above-described arrangement, the heat radiation property of the LED lighting apparatus can be improved.

LED lighting apparatus with improved heat radiation property

Disclosed is a lighting apparatus for reducing total harmonic distortion (THD). The lighting apparatus may include a lighting unit having a plurality of LED groups divided into first and second lighting groups, and the lighting unit may provide a current path for light emission corresponding to a change of a rectified voltage, using two or more drives having the same structure.

Growing community of inventors

Suwon-si, South Korea

Yong Geun Kim