公开(公告)号：US08400077B2

公开(公告)日：2013-03-19

申请号：US12817738

申请日：2010-06-17

Applicant: Chung-Tsai Huang ,  Po-Yi Lee ,  Shang-Jin Yan

Inventor： Chung-Tsai Huang ,  Po-Yi Lee ,  Shang-Jin Yan

IPC: H05B37/00

CPC classification number: H05B33/0815

Abstract: A power supply circuit for receiving an input voltage and outputting a driving voltage to at least one LED string. The power supply circuit includes a rear-stage converting circuit and a control circuit. The rear-stage converting circuit is used for receiving the input voltage and converting the input voltage into a compensating voltage. The control circuit is connected to the rear-stage converting circuit and the LED string for detecting the magnitude of a current passing through the LED string, thereby controlling the current passing through the LED string to be identical. The driving voltage is outputted from the power supply circuit. The driving voltage is a summation of the input voltage and the compensating voltage.

Abstract translation: 一种用于接收输入电压并向至少一个LED串输出驱动电压的电源电路。 电源电路包括后级转换电路和控制电路。 后级转换电路用于接收输入电压并将输入电压转换成补偿电压。 控制电路连接到后级转换电路和LED串，用于检测通过LED串的电流的大小，从而控制通过LED串的电流相同。 从电源电路输出驱动电压。 驱动电压是输入电压和补偿电压的总和。

公开(公告)号：US08183795B2

公开(公告)日：2012-05-22

申请号：US12489984

申请日：2009-06-23

Applicant: Chung-Tsai Huang ,  Shang-Jin Yan ,  Po-Yi Lee

Inventor： Chung-Tsai Huang ,  Shang-Jin Yan ,  Po-Yi Lee

IPC: G05F1/00 ,  H05B37/02 ,  H05B39/04 ,  H05B41/36

CPC classification number: H05B33/0818 ,  Y02B20/347

Abstract: A LED current-controlling circuit includes a first magnetic amplifier, a first current detecting circuit, a first magnetic amplifier controller and a first diode. The first magnetic amplifier is connected to an input terminal of the LED current-controlling circuit and the first LED string. The first current detecting circuit is connected to the first LED string in series for detecting the first current flowing through the first LED string. The first magnetic amplifier controller is used for controlling on/off statuses of the first magnetic amplifier. The first diode is connected to an output terminal of the first magnetic amplifier, the first LED string and the first magnetic amplifier controller. The first magnetic amplifier controller controls on/off statuses of the first magnetic amplifier according to the magnitude of the first current, thereby maintaining the first current at a specified DC current level.

Abstract translation: LED电流控制电路包括第一磁放大器，第一电流检测电路，第一磁放大器控制器和第一二极管。 第一磁放大器连接到LED电流控制电路和第一LED串的输入端。 第一电流检测电路串联连接到第一LED串，用于检测流过第一LED串的第一电流。 第一磁放大器控制器用于控制第一磁放大器的开/关状态。 第一二极管连接到第一磁放大器的输出端，第一LED串和第一磁放大器控制器。 第一磁放大器控制器根据第一电流的大小控制第一磁放大器的开/关状态，从而将第一电流保持在指定的直流电流水平。

公开(公告)号：US08044600B2

公开(公告)日：2011-10-25

申请号：US12236237

申请日：2008-09-23

Applicant: Shang-Jin Yan ,  Chung-Tsai Huang ,  Po-Yi Lee

Inventor： Shang-Jin Yan ,  Chung-Tsai Huang ,  Po-Yi Lee

IPC: H05B37/02

CPC classification number: H05B33/0815 ,  H05B33/0845

Abstract: A brightness-adjustable LED driving circuit includes a rectifying and filtering circuit, a power factor correction power conversion circuit, and a detecting and controlling circuit. The rectifying and filtering circuit is used for filtering and rectifying a brightness adjusting voltage into a first DC voltage. The power factor correction power conversion circuit is electrically connected to the rectifying and filtering circuit and at least one LED string for generating an output current required for powering the at least one LED string. The detecting and controlling circuit detects phase data of the brightness adjusting voltage and the output current generated by the power factor correction power conversion circuit. The detecting and controlling circuit generates a control signal to the power factor correction controller according to the phase data of the brightness adjusting voltage, so that the magnitude of the output current is changed according to the phase data of the brightness adjusting voltage.

Abstract translation: 亮度可调的LED驱动电路包括整流滤波电路，功率因数校正功率转换电路和检测和控制电路。 整流滤波电路用于将亮度调整电压滤波和整流为第一直流电压。 功率因数校正功率转换电路电连接到整流和滤波电路以及至少一个LED串，用于产生为至少一个LED串供电所需的输出电流。 检测和控制电路检测亮度调节电压和由功率因数校正功率转换电路产生的输出电流的相位数据。 检测和控制电路根据亮度调节电压的相位数据向功率因数校正控制器产生控制信号，使得输出电流的大小根据亮度调节电压的相位数据而改变。