公开(公告)号：US08274269B2

公开(公告)日：2012-09-25

申请号：US12487596

申请日：2009-06-18

申请人： Kwi Dong Kim ,  Jong Kee Kwon ,  Jong Dae Kim ,  Yong Seo Koo

发明人： Kwi Dong Kim ,  Jong Kee Kwon ,  Jong Dae Kim ,  Yong Seo Koo

IPC分类号： G05F1/00

CPC分类号： H02M1/08 ,  H02M2001/0032 ,  Y02B70/16

摘要： Provided are a switching circuit and a small-size high-efficiency direct current-to-direct current (DC-DC) converter for portable devices including the same. Using dynamic threshold-complementary metal oxide semiconductor (DT-CMOS) transistors having dynamic threshold voltages as a switching device, the switching circuit maintains a low threshold voltage in a normal mode to improve current drivability while reducing conduction loss, and maintains a high threshold voltage in a standby mode to minimize power consumption. When the switching circuit is employed in a DC-DC converter, power conversion efficiency can be improved by reducing conduction loss in the normal mode, and power consumption can be minimized in the standby mode. Consequently, the DC-DC converter can maximize a use time of a battery of a portable device and can be useful in power supplies of portable devices that are gradually being miniaturized.

摘要翻译： 提供了一种用于包括其的便携式设备的开关电路和小尺寸高效率直流 - 直流（DC-DC）转换器。 使用具有动态阈值电压的动态阈值互补金属氧化物半导体（DT-CMOS）晶体管作为开关器件，开关电路在正常模式下维持低阈值电压，从而改善电流驱动能力，同时降低导通损耗，并保持高阈值电压 处于待机模式以最小化功耗。 当在DC-DC转换器中采用开关电路时，可以通过降低正常模式下的导通损耗来提高功率转换效率，并且在待机模式下功耗可以最小化。 因此，DC-DC转换器可以使便携式设备的电池的使用时间最大化，并且可以用于逐渐小型化的便携式设备的电源。

公开(公告)号：US06805405B2

公开(公告)日：2004-10-19

申请号：US10076847

申请日：2002-02-12

申请人： Yong-Seo Koo

发明人： Yong-Seo Koo

IPC分类号： A47C3025

CPC分类号： A47C7/465 ,  A47C3/026

摘要： A chair equipped with a lumbar support unit is disclosed. The lumbar support unit includes a lumbar plate attached to a lower portion of a tiltable backrest part, and an actuating connector comprising a connecting wire which is connected at one end to an upper end of the lumbar plate and is connected at the other end to a chair frame supporting the seat and back parts, and a connecting tube surrounding the connecting wire, which is positioned at one end at a location downwardly spaced from the one end of the connecting wire, and is connected at the other end to a movable frame. The lumbar plate is automatically protruded forward to snugly support a lumbar region of a user when the back part is tilted rearwardly. The chair can afford convenient operation and protection of a lumbar region of a user.

摘要翻译： 公开了配备有腰部支撑单元的椅子。 腰椎支撑单元包括连接到可倾斜靠背部分的下部的腰椎板，以及致动连接器，其包括连接线，该连接线在一端连接到腰椎板的上端，并且在另一端连接到 支撑座椅和后部的椅子框架和围绕连接线的连接管，该连接管一端位于与连接线的一端向下间隔开的位置处，并且在另一端连接到可动框架。 当后部向后倾斜时，腰椎板自动地向前突出以紧密地支撑使用者的腰部区域。 椅子可以方便地操作和保护使用者的腰部区域。

公开(公告)号：US20100123445A1

公开(公告)日：2010-05-20

申请号：US12487596

申请日：2009-06-18

申请人： Kwi Dong KIM ,  Jong Kee Kwon ,  Jong Dae Kim ,  Yong Seo Koo

发明人： Kwi Dong KIM ,  Jong Kee Kwon ,  Jong Dae Kim ,  Yong Seo Koo

IPC分类号： G05F1/618

CPC分类号： H02M1/08 ,  H02M2001/0032 ,  Y02B70/16

摘要： Provided are a switching circuit and a small-size high-efficiency direct current-to-direct current (DC-DC) converter for portable devices including the same. Using dynamic threshold-complementary metal oxide semiconductor (DT-CMOS) transistors having dynamic threshold voltages as a switching device, the switching circuit maintains a low threshold voltage in a normal mode to improve current drivability while reducing conduction loss, and maintains a high threshold voltage in a standby mode to minimize power consumption. When the switching circuit is employed in a DC-DC converter, power conversion efficiency can be improved by reducing conduction loss in the normal mode, and power consumption can be minimized in the standby mode. Consequently, the DC-DC converter can maximize a use time of a battery of a portable device and can be useful in power supplies of portable devices that are gradually being miniaturized.

摘要翻译： 提供了一种用于包括其的便携式设备的开关电路和小尺寸高效率直流 - 直流（DC-DC）转换器。 使用具有动态阈值电压的动态阈值互补金属氧化物半导体（DT-CMOS）晶体管作为开关器件，开关电路在正常模式下维持低阈值电压，从而改善电流驱动能力，同时降低导通损耗，并保持高阈值电压 处于待机模式以最小化功耗。 当在DC-DC转换器中采用开关电路时，可以通过降低正常模式下的导通损耗来提高功率转换效率，并且在待机模式下功耗可以最小化。 因此，DC-DC转换器可以使便携式设备的电池的使用时间最大化，并且可以用于逐渐小型化的便携式设备的电源。