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11. 发明申请

US20080259017A1 REDUCING POWER CONSUMPTION IN A LIQUID CRYSTAL DISPLAY 有权
标题翻译：降低液晶显示屏的功耗
公开(公告)号：US20080259017A1
公开(公告)日：2008-10-23
申请号：US11855281
申请日：2007-09-14
申请人： David Wright , Jason Muriby , Erhan Hancioglu , Harold Kutz
发明人： David Wright , Jason Muriby , Erhan Hancioglu , Harold Kutz
IPC分类号： G09G3/36
CPC分类号： H03K17/687 , H03K19/0016 , H03K19/00369
摘要： Embodiments of the invention relate to a method and apparatus to reduce power consumption in a passive matrix LCD driver circuit by using a plurality of drive buffers and active power management of sub-blocks in the passive matrix LCD drive circuit. Each drive buffer may operate in a first phase, which may include a high-drive mode to drive an LCD voltage to a threshold voltage level and a low-drive mode to modify the LCD voltage to approximate an input voltage of the drive buffer, and to maintain a constant LCD voltage level. The low-drive buffer consumes less current than the high-drive buffer, thus reducing power consumption. The drive buffer may also operate in a second phase, also a no-drive mode, in which the drive buffer and the bias voltage generator may be completely turned off, to further reduce power consumption. The drive buffer may be used to drive capacitive loads, as well as partially-resistive loads and inductive loads.
摘要翻译：本发明的实施例涉及通过使用多个驱动缓冲器和无源矩阵LCD驱动电路中的子块的有功功率管理来减少无源矩阵LCD驱动器电路中的功耗的方法和装置。每个驱动缓冲器可以在第一阶段中操作，其可以包括将LCD电压驱动到阈值电压电平的高驱动模式和用于修改LCD电压以接近驱动缓冲器的输入电压的低驱动模式，以及保持恒定的LCD电压电平。低驱动缓冲器比高驱动缓冲器消耗更少的电流，从而降低功耗。驱动缓冲器还可以在驱动缓冲器和偏置电压发生器可以完全关闭的第二阶段也是非驱动模式下工作，以进一步降低功耗。驱动缓冲器可用于驱动电容性负载，以及部分电阻负载和电感负载。

12. 发明申请

US20080258797A1 NON-RESISTIVE LOAD DRIVER 有权
标题翻译：非电阻负载驱动器
公开(公告)号：US20080258797A1
公开(公告)日：2008-10-23
申请号：US11843216
申请日：2007-08-22
申请人： David Wright , Jason Muriby , Erhan Hancioglu
发明人： David Wright , Jason Muriby , Erhan Hancioglu
IPC分类号： H03L5/00
CPC分类号： H03K17/687 , H03K19/0016 , H03K19/00369
摘要： Embodiments of the invention relate to a method and apparatus to drive non-resistive loads. The non-resistive load driver may include two or more drivers, such as a high-drive circuit and a low-drive circuit, to drive rail-to-rail output voltages and to stabilize the output voltages at a substantially constant level. The high-drive circuit may drive the output voltage of the non-resistive load driver to a threshold level, whereas the low-drive circuit may modify the output voltage of the non-resistive load driver to approximate an input voltage of the non-resistive load driver, and compensate any leakage associated with the non-resistive loads to provide a substantially constant output voltage. The low-drive circuit consumes less current than the high-drive circuit. The non-resistive load driver consumes less power and use less chip space. Alternatively, the non-resistive load driver may be implemented using a single driver with multiple modes, such as a low-drive mode and a high-drive mode, by changing a bias current of the non-resistive load driver between a high current mode and a low current mode.
摘要翻译：本发明的实施例涉及一种驱动非阻性负载的方法和装置。非阻性负载驱动器可以包括两个或更多个驱动器，例如高驱动电路和低驱动电路，以驱动轨至轨输出电压并将输出电压稳定在基本上恒定的水平。高驱动电路可以将非阻力负载驱动器的输出电压驱动到阈值电平，而低驱动电路可以修改非阻性负载驱动器的输出电压以近似非阻性负载驱动器的输入电压负载驱动器，并补偿与非电阻负载相关的任何泄漏，以提供基本恒定的输出电压。低驱动电路比高驱动电路消耗更少的电流。非阻性负载驱动器消耗更少的功率并减少芯片空间。或者，可以使用具有多种模式的单个驱动器来实现非阻性负载驱动器，例如低驱动模式和高驱动模式，通过改变非电阻负载驱动器在高电流模式之间的偏置电流和低电流模式。

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