公开(公告)号：US20120049750A1

公开(公告)日：2012-03-01

申请号：US13110154

申请日：2011-05-18

Applicant: Dang-Ko Wang ,  Hung-Ching Lee ,  Ching-Chou Yu

Inventor： Dang-Ko Wang ,  Hung-Ching Lee ,  Ching-Chou Yu

IPC: H05B37/02

CPC classification number: H05B33/0827

Abstract: An exemplary LED driving method is adapted for driving multiple LED strings. Each of the LED strings includes single one LED or multiple LEDs connected in series. In particular, the LED driving method includes steps of: obtaining an initial value of a duty-on period of a driving current in a frequency period to thereby acquire a target accumulative luminosity in the initial value of the duty-on period for each of the LED strings; and prolonging the duty-on period of the driving current in the frequency period and assuring an accumulative luminosity in the prolonged duty-on period to be substantially equal to the target accumulative luminosity for each of the LED strings, when the maximum one of the initial values of the duty-on periods of the driving currents in the frequency period for the LED strings is shorter than the frequency period.

Abstract translation: LED驱动方法适用于驱动多个LED串。 每个LED串包括串联连接的单个LED或多个LED。 特别地，LED驱动方法包括以下步骤：获得频率周期中的驱动电流的占空比周期的初始值，从而获得每个的每个的占空比期间的初始值的目标累积亮度 LED灯串; 并且在频率周期中延长驱动电流的占空比时间，并且在延长的占空比时间段中确保每个LED串的目标累积亮度基本上等于目标累积亮度的累积亮度，当最初的 LED串的频率周期中的驱动电流的占空比周期的值比频率周期短。

公开(公告)号：US20090262064A1

公开(公告)日：2009-10-22

申请号：US12135222

申请日：2008-06-09

Applicant: Yueh-Han Li ,  Po-Tang Hsu ,  Chien-Ming Ko ,  Ching-Chou Yu

Inventor： Yueh-Han Li ,  Po-Tang Hsu ,  Chien-Ming Ko ,  Ching-Chou Yu

IPC: G09G3/36

CPC classification number: G09G3/342 ,  G09G2310/024 ,  G09G2310/08 ,  G09G2320/0261 ,  G09G2330/06

Abstract: An LCD and a backlight module driving device and a method thereof are provided. The method is adapted to drive at least one backlight unit in a backlight module. The backlight unit is used for supplying a surface light source to an Nth area pixel of the LCD panel, where N is a positive integer. The method includes the following steps of first calculating a time of the Nth area pixel under a stable state in a frame period and then providing a control signal to drive the backlight unit when the Nth area pixel is under the stable state in the frame period.

Abstract translation: 提供了LCD和背光模块驱动装置及其方法。 该方法适于驱动背光模块中的至少一个背光单元。 背光单元用于向LCD面板的第N个区域像素提供表面光源，其中N是正整数。 该方法包括以下步骤：在帧周期内首先计算稳定状态下的第N个区域像素的时间，然后在帧周期中当第N个区域像素处于稳定状态时提供控制信号来驱动背光单元。