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    • 2. 发明授权
    • Boost converter for reducing voltage stress
    • 升压转换器,用于降低电压应力
    • US08854837B2
    • 2014-10-07
    • US13220188
    • 2011-08-29
    • Hyo Young KimJong Rak KimSung Hun OhJin Hwan Kim
    • Hyo Young KimJong Rak KimSung Hun OhJin Hwan Kim
    • H02M3/335H02M1/34
    • H02M3/335H02M2001/346Y02B70/1491
    • There is provided a boost converter capable of reducing voltage stress within each element thereof, without using a separate loss snubber circuit, by clamping a voltage applied to an output diode to correspond to a difference between an input voltage and an output voltage. The boost converter includes a transformer including a primary winding receiving an input power and a secondary winding electromagnetically coupled to the primary winding and having a preset turn ratio therewith; a switching unit switching the input power transferred to the primary winding on and off according to a preset duty ratio; a stabilizing unit including an output diode rectifying the power outputted from the secondary winding to stabilize an output power; and a clamping unit clamping a voltage applied to the output diode to correspond to a difference between the input power and the output power during a switching on operation of the switching unit.
    • 提供了一种升压转换器,其能够通过钳位施加到输出二极管的电压以对应于输入电压和输出电压之间的差来减小其每个元件内的电压应力,而不使用单独的损耗缓冲电路。 升压转换器包括变压器,其包括接收输入功率的初级绕组和与该初级绕组电磁耦合并具有预设的匝数比的次级绕组; 开关单元根据预设的占空比将传递到初级绕组的输入功率接通和断开; 稳定单元,其包括对从次级绕组输出的功率进行整流以稳定输出功率的输出二极管; 以及钳位单元,钳位施加到输出二极管的电压,以对应于在开关单元的接通操作期间输入功率和输出功率之间的差。
    • 3. 发明授权
    • Light emitting device driving apparatus and method for driving the same
    • 发光装置驱动装置及其驱动方法
    • US08125161B2
    • 2012-02-28
    • US12591737
    • 2009-11-30
    • Hyo Young KimSung Hun OhJin Hwan KimJong Rak Kim
    • Hyo Young KimSung Hun OhJin Hwan KimJong Rak Kim
    • G05F1/00
    • H05B33/0827H05B33/0818Y02B20/347
    • The present invention relates to a light emitting device (LED) driving apparatus that constantly maintains the average current flowing onto a plurality of channels. The light emitting device (LED) driving apparatus includes: a LED light source unit in which at least one LED channel is connected in parallel; at least one current detector that is disposed on a low end of a LED channel of the LED light source unit to detect the current flowing onto respective LED channels; at least one channel current controller that generates control signal controlling the average current of the channels by comparing current detected from the channels with reference wave; and a switching element that controls the average current of the LED channels in a PWM scheme according to the control signals.
    • 本发明涉及持续保持流过多个通道的平均电流的发光装置(LED)驱动装置。 发光装置(LED)驱动装置包括:LED光源单元,其中至少一个LED通道并联连接; 至少一个电流检测器,设置在LED光源单元的LED通道的低端,以检测流到各个LED通道的电流; 至少一个通道电流控制器,其通过将从所述通道检测到的电流与参考波相比较来产生控制所述通道的平均电流的控制信号; 以及开关元件,其根据控制信号控制PWM方案中的LED通道的平均电流。
    • 9. 发明授权
    • Display device
    • 显示设备
    • US09046692B2
    • 2015-06-02
    • US13601866
    • 2012-08-31
    • Hae Young YunIl-Joo KimJin Oh SongSeung Jun JeongJin Hwan Kim
    • Hae Young YunIl-Joo KimJin Oh SongSeung Jun JeongJin Hwan Kim
    • G02F1/133G02F1/13G02B27/22
    • G02B27/22
    • A display device includes a display panel for displaying an image. The display device further includes a lens configured to refract at least a portion of a collimated light having a center ray, a first outermost ray, a second outermost ray, a first plurality of rays between the first outermost ray and the center ray, and a second plurality of rays between the second outermost ray and the center ray. The lens may concentrate the first plurality of rays such that a first position on the display panel has a first light intensity. The lens may concentrate the second plurality of rays such that a second position on the display panel has a second light intensity. Each of the first light intensity and the second light intensity is substantially greater than a center light intensity on the display panel corresponding to at least the center ray.
    • 显示装置包括用于显示图像的显示面板。 显示装置还包括透镜,被配置为折射具有中心射线,第一最外侧射线,第二最外侧射线,第一最外侧射线与中心射线之间的第一多个射线的准直光的至少一部分,以及 在第二最外侧射线与中心射线之间的第二组光线。 透镜可以集中第一多个光线,使得显示面板上的第一位置具有第一光强度。 透镜可以集中第二多个光线,使得显示面板上的第二位置具有第二光强度。 第一光强度和第二光强度中的每一个基本上大于对应于至少中心射线的显示面板上的中心光强度。
    • 10. 发明授权
    • Light emitting diode driving circuit having voltage detection
    • 具有电压检测的发光二极管驱动电路
    • US08144111B2
    • 2012-03-27
    • US12251176
    • 2008-10-14
    • Jin Hwan KimNam Kyu LeeDoo Ho YooYoung Jong Yoo
    • Jin Hwan KimNam Kyu LeeDoo Ho YooYoung Jong Yoo
    • G09G3/36
    • H05B33/0815G09G3/342G09G2320/064G09G2330/04H05B33/0827Y02B20/347
    • There is provided a driving circuit of a light emitting device. The driving circuit of a light emitting may include: a DC/DC converter converting an input DC voltage into an output DC voltage; a light emitting device block including a plurality of LED groups connected to an output terminal of the DC/DC converter; a current source circuit unit including a plurality of current sources; a voltage detection unit detecting the output DC voltage of the DC/DC converter; a minimum voltage detection unit detecting a minimum voltage among a plurality of voltages between the plurality of LED groups and the plurality of current sources, respectively; and a single comparator including a first non-inverting input terminal receiving the voltage detected by the voltage detection unit, a second non-inverting input terminal receiving the minimum voltage detected by the minimum voltage detection unit, and an inverting input terminal receiving a predetermined reference voltage.
    • 提供了一种发光装置的驱动电路。 发光的驱动电路可以包括:将输入DC电压转换为输出DC电压的DC / DC转换器; 发光器件块,包括连接到DC / DC转换器的输出端子的多个LED组; 包括多个电流源的电流源电路单元; 电压检测单元,检测DC / DC转换器的输出直流电压; 最小电压检测单元,分别检测所述多个LED组和所述多个电流源之间的多个电压中的最小电压; 以及单个比较器,包括接收由电压检测单元检测到的电压的第一非反相输入端子,接收由最小电压检测单元检测到的最小电压的第二非反相输入端子和接收预定参考值的反相输入端子 电压。