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1. 发明授权

US07777704B2 System and method for controlling a multi-string light emitting diode backlighting system for an electronic display 有权
标题翻译：用于控制用于电子显示器的多串发光二极管背光系统的系统和方法
公开(公告)号：US07777704B2
公开(公告)日：2010-08-17
申请号：US11652736
申请日：2007-01-12
申请人： Dilip S , Gurjit Thandi , Hendrik Santo , Kien Vi
发明人： Dilip S , Gurjit Thandi , Hendrik Santo , Kien Vi
IPC分类号： G09G3/32
CPC分类号： G09G3/3413 , G09G2320/064 , H05B33/0815 , H05B33/0827 , Y02B20/346
摘要： The present invention relates to displays that use LED strings for backlighting. A lead string is provided with continuous drive voltage and the non-lead strings are provided with pulsed drive pulses. The string having the highest forward voltage is selected as the lead string. Feedback information indicative of the currents flowing through the non-lead strings is used to determine the duty cycles of the voltage pulses provided to drive the non-lead strings. The non-lead strings are controlled using pulsed drive voltages to minimize power dissipation in the circuit.
摘要翻译：本发明涉及使用LED串进行背光照明的显示器。引线串具有连续驱动电压，非引线串提供脉冲驱动脉冲。选择具有最高正向电压的串作为引线串。指示流经非引线串的电流的反馈信息用于确定为驱动非引线串提供的电压脉冲的占空比。使用脉冲驱动电压来控制非引线串，以最小化电路中的功耗。

2. 发明授权

US07663326B2 Temperature dependant LED current controller 有权
标题翻译：温度依赖LED电流控制器
公开(公告)号：US07663326B2
公开(公告)日：2010-02-16
申请号：US11805525
申请日：2007-05-22
申请人： Hendrik Santo , Gurjit Thandi , Dilip S , Kien Vi
发明人： Hendrik Santo , Gurjit Thandi , Dilip S , Kien Vi
IPC分类号： H05B37/02
CPC分类号： H05B33/0854
摘要： The present invention provides a controller for regulating current in LEDs in electronic displays. The controller uses temperature sensing diodes to detect changes in the LED ambient temperature. As the LED ambient temperature changes, the forward voltage of the temperature sensing diode decreases. A signal processor adjusts the current passing through the LEDs based on the temperature induced changes in the forward voltage of the temperature sensing diodes. The present invention can reduce costs over the present methods of regulating current in LEDs and may more easily be integrated into a single integrated circuit chip. The temperature sensing may also be implemented outside the integrated circuit chip.
摘要翻译：本发明提供一种用于调节电子显示器中的LED中的电流的控制器。控制器使用温度感应二极管来检测LED环境温度的变化。随着LED环境温度的变化，温度感应二极管的正向电压降低。信号处理器根据温度感应二极管的正向电压的变化来调节通过LED的电流。本发明可以降低LED中调节电流的现有方法的成本，并且可以更容易地集成到单个集成电路芯片中。也可以在集成电路芯片之外实现温度感测。

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