Light-emitting element driving device
    1.
    发明授权
    Light-emitting element driving device 有权
    发光元件驱动装置

    公开(公告)号:US08878445B2

    公开(公告)日:2014-11-04

    申请号:US13314597

    申请日:2011-12-08

    IPC分类号: G09G3/36 H05B33/08

    摘要: Short circuit failures and open circuit failures of light-emitting elements used for the backlight in an LCD panel can be reliably and easily detected. The voltage at the node between each series-connected light-emitting element array and a drive circuit is detected as a monitored voltage. A maximum detector detects the highest and a minimum detector detects the lowest of these monitored voltages. Short circuit or open circuit failure of a light-emitting element is detected by comparing the voltage difference between the maximum detector output and the minimum detector output with a specific reference voltage.

    摘要翻译: 可以可靠且容易地检测用于LCD面板中的背光的发光元件的短路故障和开路故障。 每个串联连接的发光元件阵列和驱动电路之间的节点处的电压被检测为监视电压。 最大检测器检测到最高检测器,并且最小检测器检测到这些监控电压中的最低值。 通过将最大检测器输出和最小检测器输出之间的电压差与特定参考电压进行比较来检测发光元件的短路或开路故障。

    LOAD DRIVING APPARATUS
    6.
    发明申请
    LOAD DRIVING APPARATUS 有权
    负载驱动装置

    公开(公告)号:US20100060177A1

    公开(公告)日:2010-03-11

    申请号:US12553361

    申请日:2009-09-03

    IPC分类号: H05B37/02 G05F1/00

    CPC分类号: H05B33/0815 H05B33/0824

    摘要: The load driving apparatus according to the present invention includes a load current setting signal generating section, a load current generating section, a reference voltage generating section and a drive voltage generating section. The load current setting signal generating section generates a desired load current setting signal. The load current generating section generates a load current based on the load current setting signal to drive the load. The reference voltage generating section generates a reference voltage based on the load current setting signal. The drive voltage generating section generates a drive voltage, supplies the drive voltage to the load, generates a between-both-terminals voltage between both terminals of the load current generating section based on the drive voltage and controls the drive voltage so that the difference between the between-both-terminals voltage and the reference voltage becomes small.

    摘要翻译: 根据本发明的负载驱动装置包括负载电流设定信号生成部,负载电流产生部,基准电压生成部和驱动电压生成部。 负载电流设定信号生成部生成期望的负载电流设定信号。 负载电流产生部根据负载电流设定信号生成负载电流,驱动负载。 参考电压产生部分基于负载电流设置信号产生参考电压。 驱动电压产生部生成驱动电压,向驱动电压供给驱动电压,根据驱动电压在负载电流产生部的两端之间产生两端电压,并控制驱动电压, 两端电压和参考电压变小。

    LIGHT EMITTING ELEMENT DRIVING APPARATUS
    7.
    发明申请
    LIGHT EMITTING ELEMENT DRIVING APPARATUS 审中-公开
    发光元件驱动装置

    公开(公告)号:US20100052572A1

    公开(公告)日:2010-03-04

    申请号:US12548781

    申请日:2009-08-27

    IPC分类号: H05B37/02

    摘要: The N light emitting element groups each include one or more light emitting elements. The power source circuit includes a control input terminal and supplies the power source voltage to the N light emitting element groups. The N current driving circuits, each including a feedback output terminal, generate N drive currents for driving the respective N light emitting element groups and generate main feedback voltages at the feedback output terminals based on the power source voltage. The main feedback circuit applies a main feedback signal to the control input terminal based on the N main feedback voltages. The auxiliary feedback circuit applies an auxiliary feedback signal to the control input terminal based on the power source voltage. The power source circuit adjusts the power source voltage based on at least one of the main feedback signal and the auxiliary feedback signal.

    摘要翻译: N个发光元件组各自包含一个或多个发光元件。 电源电路包括控制输入端子,并将电源电压提供给N个发光元件组。 每个包括反馈输出端的N个电流驱动电路产生用于驱动各个N个发光元件组的N个驱动电流,并且基于电源电压在反馈输出端产生主反馈电压。 主反馈电路基于N个主反馈电压向控制输入端施加主反馈信号。 辅助反馈电路基于电源电压向控制输入端子施加辅助反馈信号。 电源电路基于主反馈信号和辅助反馈信号中的至少一个来调整电源电压。

    Load driving apparatus
    8.
    发明授权
    Load driving apparatus 有权
    负载驱动装置

    公开(公告)号:US08159140B2

    公开(公告)日:2012-04-17

    申请号:US12553361

    申请日:2009-09-03

    IPC分类号: H05B37/00

    CPC分类号: H05B33/0815 H05B33/0824

    摘要: The load driving apparatus according to the present invention includes a load current setting signal generating section, a load current generating section, a reference voltage generating section and a drive voltage generating section. The load current setting signal generating section generates a desired load current setting signal. The load current generating section generates a load current based on the load current setting signal to drive the load. The reference voltage generating section generates a reference voltage based on the load current setting signal. The drive voltage generating section generates a drive voltage, supplies the drive voltage to the load, generates a between-both-terminals voltage between both terminals of the load current generating section based on the drive voltage and controls the drive voltage so that the difference between the between-both-terminals voltage and the reference voltage becomes small.

    摘要翻译: 根据本发明的负载驱动装置包括负载电流设定信号生成部,负载电流产生部,基准电压生成部和驱动电压生成部。 负载电流设定信号生成部生成期望的负载电流设定信号。 负载电流产生部根据负载电流设定信号生成负载电流,驱动负载。 参考电压产生部分基于负载电流设置信号产生参考电压。 驱动电压产生部生成驱动电压,向驱动电压供给驱动电压,根据驱动电压在负载电流产生部的两端之间产生两端电压,并控制驱动电压, 两端电压和参考电压变小。