公开(公告)号：US20120091908A1

公开(公告)日：2012-04-19

申请号：US13219602

申请日：2011-08-26

申请人： MEI-HAO WU ,  Chingyuan Yang

发明人： MEI-HAO WU ,  Chingyuan Yang

IPC分类号： H05B37/02

CPC分类号： H05B33/0818

摘要： The present invention provides a driving circuit and a driving method of a backlight module of a display apparatus. The driving method comprises the following steps: utilizing a phase detector to detect voltage phases of an inductor and a capacitor of a resonant circuit; utilizing a frequency adjusting module to obtain an operation frequency according to a phase detection signal; and utilizing a driving chip to drive a DC-to-AC power stage circuit according to the operation frequency. The invention can improve the transformation efficiency of the driving circuit.

摘要翻译： 本发明提供一种显示装置的背光模块的驱动电路和驱动方法。 驱动方法包括以下步骤：利用相位检测器检测谐振电路的电感器和电容器的电压相位; 利用频率调整模块根据相位检测信号获得操作频率; 并利用驱动芯片根据工作频率驱动DC-to-AC功率级电路。 本发明可以提高驱动电路的转换效率。

公开(公告)号：US08829814B2

公开(公告)日：2014-09-09

申请号：US13000542

申请日：2010-08-23

申请人： Chengming He ,  Chingyuan Yang

发明人： Chengming He ,  Chingyuan Yang

IPC分类号： H05B41/36 ,  H05B41/285

CPC分类号： H05B41/2855 ,  Y02B20/186

摘要： A backlight module detecting abnormal lamp tubes and an LCD employing such a backlight module are proposed. The LCD includes a voltage calculator for detecting voltage applied on ends of a lamp tube to monitor the lamp tube. Once the lamp tube becomes abnormal, the voltage varies accordingly. The voltage calculator calculates a voltage signal from a plurality of lamp tubes and produces a voltage value. A protection circuit regards the voltage value as a feedback signal to decide if there are any abnormalities. Once any of the lamp tubes is abnormal, the protection circuit transmits the voltage signal to a pulse-width modulated integrated circuit (PWM IC) to activate a protective function. The protection circuit of the present invention obtains the protection signal by sampling the voltage signal of the ends of the lamp tube and then gets the control signal by means of the calculation of the voltage calculator. Thus, voltage level retrieved from the protection signal are less easily affected by dimming and temperature.

摘要翻译： 提出了检测异常灯管的背光模块和采用这种背光模块的LCD。 LCD包括电压计算器，用于检测施加在灯管端部上的电压以监视灯管。 一旦灯管变得异常，电压就会相应变化。 电压计算器计算来自多个灯管的电压信号并产生电压值。 保护电路将电压值视为反馈信号来决定是否存在异常。 一旦灯管异常，保护电路将电压信号传输到脉冲宽度调制集成电路（PWM IC），以激活保护功能。 本发明的保护电路通过对灯管端部的电压信号进行采样来获得保护信号，然后通过电压计算器的计算获得控制信号。 因此，从保护信号检索的电压电平不太容易受到调光和温度的影响。

公开(公告)号：US08653738B2

公开(公告)日：2014-02-18

申请号：US12995730

申请日：2010-09-01

申请人： Chengming He ,  Chingyuan Yang

发明人： Chengming He ,  Chingyuan Yang

IPC分类号： H05B37/00

CPC分类号： H05B33/0824 ,  G09G3/3406 ,  G09G2330/021

摘要： The present invention provides a backlight module, and the backlight module has an LED module which has a plurality of light emitting diodes averagely divided into a plurality of light strings. Forward voltages of the light emitting diodes are between a minimum forward-voltage value and a maximum forward-voltage value, and each of the light strings at least has one first light emitting diode and one second light emitting diode. The first light emitting diode has the minimum forward-voltage value and the second light emitting diode has the maximum forward-voltage value. The backlight module is contributive to lower power loss on a constant current control circuit.

摘要翻译： 本发明提供了一种背光模块，并且背光模块具有LED模块，LED模块具有平均分成多个光线的多个发光二极管。 发光二极管的正向电压在最小正向电压值和最大正向电压值之间，并且每个光束至少具有一个第一发光二极管和一个第二发光二极管。 第一发光二极管具有最小正向电压值，第二发光二极管具有最大正向电压值。 背光模块有助于在恒流控制电路上降低功耗。

公开(公告)号：US20120044268A1

公开(公告)日：2012-02-23

申请号：US12996322

申请日：2010-09-10

申请人： Chengming He ,  Chingyuan Yang

发明人： Chengming He ,  Chingyuan Yang

IPC分类号： G09G3/36 ,  G09G5/10 ,  H05B41/16

CPC分类号： H05B33/0854 ,  G02F1/133603 ,  G02F2001/133612 ,  G02F2001/133613 ,  G02F2001/133628 ,  G09G3/3406 ,  G09G2330/025 ,  H05B33/0815 ,  H05B33/0845 ,  Y02B20/346

摘要： The present invention discloses a backlight module with a related liquid crystal display (LCD) which activates light emitting diodes (LEDs) by utilizing an alternate control method. The present invention utilizes two inverters to individually activate two sets of LEDs through an alternate method. During the same switching cycle period, the two sets of LEDs take turns turning on/off; that is, the two set of LEDs are in a closed state in a duty cycle of 50 percent. Since each set of the LEDs are in a closed condition in half the time during a switching cycle period, both of excess temperature produced by all of the LEDs when lightened simultaneously and thermal power generated during the lighting of the LEDs can be effectively reduced.

摘要翻译： 本发明公开了一种具有相关液晶显示器（LCD）的背光模块，其通过利用替代控制方法来激活发光二极管（LED）。 本发明利用两个逆变器通过另一种方法分别激活两组LED。 在相同的开关周期期间，两组LED轮流打开/关闭; 也就是说，两组LED在占空比为50％的状态下处于关闭状态。 由于每组LED在开关周期期间的一半时间处于闭合状态，因此可以有效地降低LED点亮期间由同时点亮的所有LED产生的过热温度和产生的热功率。

公开(公告)号：US20120007523A1

公开(公告)日：2012-01-12

申请号：US12996342

申请日：2010-09-01

申请人： Chengming He ,  Chingyuan Yang

发明人： Chengming He ,  Chingyuan Yang

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  G09G3/3406 ,  Y02B20/346

摘要： A backlight module and a liquid crystal display (LCD) device thereof are proposed. The backlight module includes a DC/DC converter producing a positive/negative voltage level. The backlight module can output the positive and negative levels of driving voltage from an output end of the inverter to drive LEDs through alternately switching. Besides, a constant current can be obtained with designs of power on/off periods and energy-storing inductors to prevent LEDs employing current limiting resistors from having too low current efficiency and from being burnt out.

摘要翻译： 提出了背光模块及其液晶显示器（LCD）装置。 背光模块包括产生正/负电压电平的DC / DC转换器。 背光模块可以从逆变器的输出端输出正负电压的驱动电压，通过交替切换来驱动LED。 此外，可以通过设计电源开/关周期和储能电感器来获得恒定电流，以防止采用限流电阻的LED具有太低的电流效率和不被烧坏。

公开(公告)号：US08912729B2

公开(公告)日：2014-12-16

申请号：US12996342

申请日：2010-09-01

申请人： Chengming He ,  Chingyuan Yang

发明人： Chengming He ,  Chingyuan Yang

IPC分类号： H05B39/00 ,  H05B33/08

CPC分类号： H05B33/0815 ,  G09G3/3406 ,  Y02B20/346

摘要： A backlight module and a liquid crystal display (LCD) device thereof are proposed. The backlight module includes a DC/DC converter producing a positive/negative voltage level. The backlight module can output the positive and negative levels of driving voltage from an output end of the inverter to drive LEDs through alternately switching. Besides, a constant current can be obtained with designs of power on/off periods and energy-storing inductors to prevent LEDs employing current limiting resistors from having too low current efficiency and from being burnt out.

摘要翻译： 提出了背光模块及其液晶显示器（LCD）装置。 背光模块包括产生正/负电压电平的DC / DC转换器。 背光模块可以从逆变器的输出端输出正负电压的驱动电压，通过交替切换来驱动LED。 此外，可以通过设计电源开/关周期和储能电感器来获得恒定电流，以防止采用限流电阻的LED具有太低的电流效率和不被烧坏。

公开(公告)号：US08633656B2

公开(公告)日：2014-01-21

申请号：US13219602

申请日：2011-08-26

申请人： Mei-Hao Wu ,  Chingyuan Yang

发明人： Mei-Hao Wu ,  Chingyuan Yang

IPC分类号： H05B37/00

CPC分类号： H05B33/0818

摘要： The present invention provides a driving circuit and a driving method of a backlight module of a display apparatus. The driving method comprises the following steps: utilizing a phase detector to detect voltage phases of an inductor and a capacitor of a resonant circuit; utilizing a frequency adjusting module to obtain an operation frequency according to a phase detection signal; and utilizing a driving chip to drive a DC-to-AC power stage circuit according to the operation frequency. The invention can improve the transformation efficiency of the driving circuit.

摘要翻译： 本发明提供一种显示装置的背光模块的驱动电路和驱动方法。 驱动方法包括以下步骤：利用相位检测器检测谐振电路的电感器和电容器的电压相位; 利用频率调整模块根据相位检测信号获得操作频率; 并利用驱动芯片根据工作频率驱动DC-to-AC功率级电路。 本发明可以提高驱动电路的转换效率。

公开(公告)号：US20120025721A1

公开(公告)日：2012-02-02

申请号：US12995730

申请日：2010-09-01

申请人： Chengming He ,  Chingyuan Yang

发明人： Chengming He ,  Chingyuan Yang

IPC分类号： H05B37/02

CPC分类号： H05B33/0824 ,  G09G3/3406 ,  G09G2330/021

摘要： The present invention provides a backlight module, and the backlight module has an LED module which has a plurality of light emitting diodes averagely divided into a plurality of light strings. Forward voltages of the light emitting diodes are between a minimum forward-voltage value and a maximum forward-voltage value, and each of the light strings at least has one first light emitting diode and one second light emitting diode. The first light emitting diode has the minimum forward-voltage value and the second light emitting diode has the maximum forward-voltage value. The backlight module is contributive to lower power loss on a constant current control circuit.

摘要翻译： 本发明提供了一种背光模块，并且背光模块具有LED模块，LED模块具有平均分成多个光线的多个发光二极管。 发光二极管的正向电压在最小正向电压值和最大正向电压值之间，并且每个光束至少具有一个第一发光二极管和一个第二发光二极管。 第一发光二极管具有最小正向电压值，第二发光二极管具有最大正向电压值。 背光模块有助于在恒流控制电路上降低功耗。

公开(公告)号：US20120001571A1

公开(公告)日：2012-01-05

申请号：US13000542

申请日：2010-08-23

申请人： Chengming He ,  Chingyuan Yang

发明人： Chengming He ,  Chingyuan Yang

IPC分类号： H05B41/36

CPC分类号： H05B41/2855 ,  Y02B20/186

摘要： A backlight module detecting abnormal lamp tubes and an LCD employing such a backlight module are proposed. The LCD includes a voltage calculator for detecting voltage applied on ends of a lamp tube to monitor the lamp tube. Once the lamp tube becomes abnormal, the voltage varies accordingly. The voltage calculator calculates a voltage signal from a plurality of lamp tubes and produces a voltage value. A protection circuit regards the voltage value as a feedback signal to decide if there are any abnormalities. Once any of the lamp tubes is abnormal, the protection circuit transmits the voltage signal to a pulse-width modulated integrated circuit (PWM IC) to activate a protective function. The protection circuit of the present invention obtains the protection signal by sampling the voltage signal of the ends of the lamp tube and then gets the control signal by means of the calculation of the voltage calculator. Thus, voltage level retrieved from the protection signal are less easily affected by dimming and temperature.

摘要翻译： 提出了检测异常灯管的背光模块和采用这种背光模块的LCD。 LCD包括电压计算器，用于检测施加在灯管端部上的电压以监视灯管。 一旦灯管变得异常，电压就会相应变化。 电压计算器计算来自多个灯管的电压信号并产生电压值。 保护电路将电压值视为反馈信号来决定是否存在异常。 一旦灯管异常，保护电路将电压信号传输到脉冲宽度调制集成电路（PWM IC），以激活保护功能。 本发明的保护电路通过对灯管端部的电压信号进行采样来获得保护信号，然后通过电压计算器的计算获得控制信号。 因此，从保护信号检索的电压电平不太容易受到调光和温度的影响。