METHOD AND APPARATUS FOR LED DRIVER COLOR-SEQUENTIAL SCAN
    3.
    发明申请
    METHOD AND APPARATUS FOR LED DRIVER COLOR-SEQUENTIAL SCAN 审中-公开
    LED驱动器颜色顺序扫描的方法和装置

    公开(公告)号:US20110134021A1

    公开(公告)日:2011-06-09

    申请号:US12633230

    申请日:2009-12-08

    IPC分类号: G09G3/32

    CPC分类号: H05B33/086 H05B33/0827

    摘要: A light emitting diode (LED) driver for an LED backlight of a color-sequential liquid crystal display (LCD) and method for operation thereof includes a plurality of LED strings having one or more LEDs emitting light at wavelength corresponding to a predetermined color. A plurality of switches is respectively coupled to the plurality of LED strings. A current source is switchably coupled respectively and sequentially to each of the plurality of switches by control signals to open and close the switches in a pattern that illuminates the LED strings. The switches are opened and closed sequentially to permit a respective LED string to provide an output of the predetermined color for a specific period of time such that a total output of the plurality of LED strings provides an output having the desired overall color perceived through temporal integration of an output of each respective LED string.

    摘要翻译: 用于彩色顺序液晶显示器(LCD)的LED背光源的发光二极管(LED)驱动器及其操作方法包括具有一个或多个发出对应于预定颜色的波长的光的LED的多个LED串。 多个开关分别耦合到多个LED串。 电流源通过控制信号分别顺序耦合到多个开关中的每一个,以以照亮LED串的图案来打开和闭合开关。 开关按顺序打开和关闭,以允许相应的LED串在特定时段内提供预定颜色的输出,使得多个LED串的总输出提供具有通过时间积分感知的期望整体颜色的输出 的每个LED串的输出。

    LED DRIVER CIRCUIT AND METHOD, AND SYSTEM AND METHOD FOR ESTIMATING THE JUNCTION TEMPERATURE OF A LIGHT EMITTING DIODE
    4.
    发明申请
    LED DRIVER CIRCUIT AND METHOD, AND SYSTEM AND METHOD FOR ESTIMATING THE JUNCTION TEMPERATURE OF A LIGHT EMITTING DIODE 有权
    LED驱动电路和方法,以及用于估计发光二极管的连接温度的系统和方法

    公开(公告)号:US20100315019A1

    公开(公告)日:2010-12-16

    申请号:US12864740

    申请日:2009-01-27

    IPC分类号: H05B37/02 G01K7/00

    CPC分类号: H05B33/0818 G01K7/01

    摘要: A driver circuit (10) for a light emitting diode comprises a first driver circuit (32, 32′, 32′) for generating a first current output for driving the light emitting diode, wherein the first driver circuit has a control switch for interrupting the supply of the first current output. A second driver circuit (50) is for generating a second current output for driving the light emitting diode, and the second driver circuit also has a control switch for interrupting the supply of the second current output. The overall output of the driver circuit comprises a pulse width modulated output current which alternates between a high current (Ihigh) generated by the first driver circuit and a low current (Ilow) generated by the second driver circuit. By providing separate driver circuits for two different current requirements, the circuits can be optimised for each function. For example the high current value can comprise an LED operation current, and the low current value can comprise a non-zero measurement current.

    摘要翻译: 用于发光二极管的驱动电路(10)包括用于产生用于驱动发光二极管的第一电流输出的第一驱动电路(32,32',32'),其中第一驱动电路具有用于中断 提供第一个电流输出。 第二驱动电路(50)用于产生用于驱动发光二极管的第二电流输出,并且第二驱动电路还具有用于中断第二电流输出的供给的控制开关。 驱动电路的总体输出包括在由第一驱动电路产生的高电流(Ihigh)和由第二驱动电路产生的低电流(I low)之间交替的脉宽调制输出电流。 通过为两种不同的电流要求提供单独的驱动电路,可以针对每个功能优化电路。 例如,高电流值可以包括LED操作电流,并且低电流值可以包括非零测量电流。

    LED driver circuit and method, and system and method for estimating the junction temperature of a light emitting diode
    5.
    发明授权
    LED driver circuit and method, and system and method for estimating the junction temperature of a light emitting diode 有权
    LED驱动电路和方法,以及用于估计发光二极管的结温的系统和方法

    公开(公告)号:US08278831B2

    公开(公告)日:2012-10-02

    申请号:US12864740

    申请日:2009-01-27

    IPC分类号: H05B37/02 H05B39/04 H05B41/36

    CPC分类号: H05B33/0818 G01K7/01

    摘要: A driver circuit (10) for a light emitting diode comprises a first driver circuit (32, 32′, 32′) for generating a first current output for driving the light emitting diode, wherein the first driver circuit has a control switch for interrupting the supply of the first current output. A second driver circuit (50) is for generating a second current output for driving the light emitting diode, and the second driver circuit also has a control switch for interrupting the supply of the second current output. The overall output of the driver circuit comprises a pulse width modulated output current which alternates between a high current (Ihigh) generated by the first driver circuit and a low current (Ilow) generated by the second driver circuit. By providing separate driver circuits for two different current requirements, the circuits can be optimised for each function. For example the high current value can comprise an LED operation current, and the low current value can comprise a non-zero measurement current.

    摘要翻译: 用于发光二极管的驱动电路(10)包括用于产生用于驱动发光二极管的第一电流输出的第一驱动电路(32,32',32'),其中第一驱动电路具有用于中断 提供第一个电流输出。 第二驱动电路(50)用于产生用于驱动发光二极管的第二电流输出,并且第二驱动电路还具有用于中断第二电流输出的供给的控制开关。 驱动电路的总体输出包括在由第一驱动电路产生的高电流(Ihigh)和由第二驱动电路产生的低电流(I low)之间交替的脉宽调制输出电流。 通过为两种不同的电流要求提供单独的驱动电路,可以针对每个功能优化电路。 例如,高电流值可以包括LED操作电流,并且低电流值可以包括非零测量电流。

    CALIBRATION OF LIGHT ELEMENTS WITHIN A DISPLAY
    6.
    发明申请
    CALIBRATION OF LIGHT ELEMENTS WITHIN A DISPLAY 审中-公开
    在显示屏中校准光元件

    公开(公告)号:US20110169414A1

    公开(公告)日:2011-07-14

    申请号:US13119320

    申请日:2009-09-15

    申请人: Hans Schmitz

    发明人: Hans Schmitz

    IPC分类号: H05B37/02 G01J1/00

    摘要: The invention relates to calibrating light emitters (4). In order to avoid blanking of a backlight and also to reduce the number of light sensors (14), it is possible to drive a plurality of light emitters to the pulsed initial driving condition (PWM1-PWM4), shift a start time (T0, T3) of the initial driving condition of a selected one of the light emitters temporally in front of start times (T1, T2) of remaining light emitters, detecting an illumination condition produced by the selected one of the light emitters at the beginning (T3) of a subsequent shifted driving condition of the selected one of the light emitters, determining an adjustment factor for the selected light emitter by comparing a detected illumination condition with a calibration illumination condition, and respectively supplying the selected light emitter with a modified driving condition comprising the initial driving condition modified by the adjustment factor.

    摘要翻译: 本发明涉及校准光发射器(4)。 为了避免背光的消隐以及减少光传感器(14)的数量,可以将多个发光体驱动到脉冲初始驱动条件(PWM1-PWM4),使开始时间(T0, T3)在其余的发光体的起始时间(T1,T2)的前方临时放置所选择的一个发光体的初始驱动条件,检测由开始时的所选择的一个发光体产生的照明条件(T3) 通过将检测到的照明条件与校准照明条件进行比较来确定所选择的光发射器的调整因子,并且分别向所选择的光发射器供应修改的驱动条件,所述修改的驱动条件包括 初始驾驶条件由调整因素修改。