专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2013073717A Led drive circuit and led lighting fixture using the same 有权
标题翻译： LED驱动电路和LED灯具使用相同
公开(公告)号：JP2013073717A
公开(公告)日：2013-04-22
申请号：JP2011210485
申请日：2011-09-27
申请人： Sharp Corp , シャープ株式会社
发明人： SHIMIZU TAKAYUKI , KANAMORI ATSUSHI , WARITA HIROHISA , MURATA TAKESHI
IPC分类号： H05B37/02
CPC分类号： H05B33/0809 , H05B33/0845 , H05B39/044
摘要： PROBLEM TO BE SOLVED: To provide an LED drive circuit capable of enhancing the efficiency while suppressing flickering of an LED, and to provide an LED lighting fixture.SOLUTION: When the input voltage VIN goes below a threshold voltage, a switch SW1 is switched from the output of a first reference voltage generation section to the output of a current extraction section 6, and a current is extracted depending on a first reference voltage. When the input voltage VIN exceeds the threshold voltage, the switch SW1 is switched from the output of a second reference voltage generation section to the output of the current extraction section 6, and a current is extracted depending on a second reference voltage.
摘要翻译：要解决的问题：提供一种能够在抑制LED的闪烁的同时提高效率并提供LED照明装置的LED驱动电路。
解决方案：当输入电压VIN低于阈值电压时，开关SW1从第一参考电压产生部分的输出切换到电流提取部分6的输出，并且根据第一参考电压。当输入电压VIN超过阈值电压时，开关SW1从第二参考电压产生部分的输出切换到电流提取部分6的输出，并且根据第二参考电压提取电流。版权所有（C）2013，JPO＆INPIT

2. 发明专利

JP2012069308A Led drive circuit, led illumination lamp, led illumination equipment and led illumination system 有权
标题翻译： LED驱动电路，LED照明灯，LED照明设备和LED照明系统
公开(公告)号：JP2012069308A
公开(公告)日：2012-04-05
申请号：JP2010211565
申请日：2010-09-22
申请人： Sharp Corp , シャープ株式会社
发明人： MATSUDA HIDEO , KANAMORI ATSUSHI , SHIMIZU TAKAYUKI
IPC分类号： H05B37/02
CPC分类号： H05B33/0815 , H05B33/0848
摘要： PROBLEM TO BE SOLVED: To provide an LED drive circuit or the like capable of reducing a flicker occurring when an LED load is lighting-controlled in low brightness, due to the fluctuation of an AC power supply.SOLUTION: An LED drive circuit connectable to a phase control type dimmer, in which a phase-controlled AC voltage is inputted from the phase control type dimmer and an LED load is driven by a voltage obtained by rectifying the inputted AC voltage, is configured to comprise a first phase angle detection part for detecting a phase angle in a current cycle, a second phase angle detection part for detecting a phase angle preceding by at least one cycle the current cycle, a bias part for creating a detection signal by adding a prescribed delay time to the phase angle obtained by averaging the phase angle detected by the first phase angle detection part and the phase angle detected by the second phase angle detection part, and a drive part for starting to supply an electric current to the LED load at timing based on the detection signal created by the bias part.
摘要翻译：要解决的问题：提供一种LED驱动电路等，其能够在由于交流电源的波动引起LED亮度低的LED负载被抑制时发生闪烁。解决方案：可连接到相位控制型调光器的LED驱动电路，其中从相位控制型调光器输入相位控制的交流电压，并且通过对输入的AC电压进行整流而获得的电压来驱动LED负载，被配置为包括用于检测当前周期中的相位角的第一相位角检测部分，用于检测在当前周期的至少一个周期之前的相位角的第二相位角检测部分，用于通过当前周期创建检测信号的偏置部分向通过对由第一相位角检测部检测出的相位角进行平均而得到的相位角和由第二相位角检测部检测出的相位角进行规定的延迟时间，以及开始向LED供给电流的驱动部基于由偏置部分产生的检测信号的定时负载。版权所有（C）2012，JPO＆INPIT

3. 发明专利

JP2011228063A Light-emitting diode drive dimmer circuit, light-emitting diode illumination device, light-emitting diode backlight device, and liquid crystal display device 审中-公开
标题翻译：发光二极管驱动二极管电路，发光二极管照明装置，发光二极管背光装置和液晶显示装置
公开(公告)号：JP2011228063A
公开(公告)日：2011-11-10
申请号：JP2010095289
申请日：2010-04-16
申请人： Sharp Corp , シャープ株式会社
发明人： SAWADA SHINICHI , SHIMIZU TAKAYUKI , TANAKA NAOKI
IPC分类号： H05B37/02 , H01L33/00
摘要： PROBLEM TO BE SOLVED: To provide a light-emitting diode drive dimmer circuit capable of modulating light over a wide range, a light-emitting diode illumination device, a light-emitting diode backlight device, and a liquid crystal display device.SOLUTION: An output voltage V1 applied to an LED row 9 is divided while the LED row 9 is turned on, with the result retained as a comparison reference voltage, and constant voltage control is exercised based on the comparison reference voltage while the LED row 9 is turned off, with the output voltage V1 referenced as constant voltage. Thus, a voltage during a turn-on period T1 during which the LED row 9 was turned on can be applied to the LED row 9 when it turns on again. That way, a delay time until a current IF flowing in the LED row 9 reaches a set current IF' can be minimized. Therefore, even when a duty cycle of a dimmer PWM signal is reduced, an LED drive dimmer circuit 1 can be maintained operative while the current IF flowing in the LED row 9 is in the sate of the set current IF'.
摘要翻译：要解决的问题：提供一种能够在宽范围内调制光的发光二极管驱动调光电路，发光二极管照明装置，发光二极管背光装置和液晶显示装置。解决方案：在LED行9接通的同时分配施加到LED行9的输出电压V1，结果保持为比较参考电压，并且基于比较参考电压执行恒定电压控制，同时 LED排9关闭，输出电压V1为恒定电压。因此，当LED行9接通时的导通期间T1期间的电压可以再次接通时被施加到LED行9。这样，直到在LED行9中流动的电流IF达到设定电流IF'的延迟时间可以被最小化。因此，即使当调光PWM信号的占空比减小时，LED驱动调光电路1也可以保持工作，同时在LED行9中流动的电流IF处于设定电流IF'的状态。版权所有（C）2012，JPO＆INPIT

4. 发明专利

JP2011198671A Led drive circuit, led illumination fixture, led illumination equipment, and led illumination system 有权
标题翻译： LED驱动电路，LED照明灯具，LED照明设备和LED照明系统
公开(公告)号：JP2011198671A
公开(公告)日：2011-10-06
申请号：JP2010065876
申请日：2010-03-23
申请人： Sharp Corp , シャープ株式会社
发明人： SHIMIZU TAKAYUKI , WARITA HIROHISA , KANAMORI ATSUSHI , MARIYAMA MITSURU
IPC分类号： H05B37/02 , H01L33/00
CPC分类号： H05B33/0815 , Y02B20/383
摘要： PROBLEM TO BE SOLVED: To provide an LED driving circuit capable of reducing flickering of an LED generated when used together with a phase controlling dimmer.SOLUTION: The LED driving circuit 4A, which can be connected to the phase controlling dimmer 2 and drives an LED module 3 by inputting an AC voltage includes: an edge detection circuit 5 to detect an edge of an output voltage of the phase controlling dimmer 2; and a current extraction circuit 10 to extract a current from a current supplying line LN1 to supply an LED driving current to the LED module 3. A value of the current extracted from the current supplying line LN1 by the current extraction circuit 10 is varied corresponding to a detection result of the edge detection circuit 5.
摘要翻译：要解决的问题：提供一种能够减少与相位控制调光器一起使用时产生的LED的闪烁的LED驱动电路。解决方案：LED驱动电路4A，其可以连接到相位调光器2并驱动LED 模块3通过输入AC电压包括：边缘检测电路5，用于检测相位控制调光器2的输出电压的边沿; 以及电流提取电路10，用于从电流供给线路LN1提取电流，以向LED模块3提供LED驱动电流。由电流提取电路10从电流供给线LN1提取的电流的值根据边缘检测电路5的检测结果。

5. 发明专利

JP2005286646A Optical receiver 有权
标题翻译：光接收机
公开(公告)号：JP2005286646A
公开(公告)日：2005-10-13
申请号：JP2004096779
申请日：2004-03-29
申请人： Sharp Corp , シャープ株式会社
发明人： SHIMIZU TAKAYUKI
IPC分类号： H04B10/40 , H02H3/00 , H04B10/50 , H04B10/524 , H04B10/556 , H04B10/58 , H04B10/60 , H04B10/04 , H04B10/00 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28
CPC分类号： H04B10/66
摘要： PROBLEM TO BE SOLVED: To provide an optical receiver capable of making current consumption of the optical receiver almost zero (about leak current of a device) when no optical signal comes in, which is advantageous to low power consumption with no requirement for shutdown control signal from outside.
SOLUTION: The optical receiver comprises a low frequency/high frequency current separation filter circuit 12 which separates the low frequency current component of the current signal generated by a light receiving element 11 from the high frequency current component. It is provided with a current-voltage conversion circuit 13 that converts the low frequency current component to a voltage, and a bias circuit 15 for triggering a signal processing circuit 20 on the output of the current-voltage conversion circuit 13.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供一种当没有光信号进入时能够使光接收机的电流消耗几乎为零（关于器件的漏电流）的光接收机，这对于低功耗是有利的，不需要关闭控制信号从外部。解决方案：光接收机包括低频/高频电流分离滤波器电路12，其将由光接收元件11产生的电流信号的低频电流分量与高频电流分量分离。设置有将低频电流分量转换为电压的电流 - 电压转换电路13以及用于触发电流 - 电压转换电路13的输出上的信号处理电路20的偏置电路15.＆lt; COPYRIGHT （C）2006，JPO＆NCIPI

6. 发明专利

JP2005223103A Light-emitting diode drive circuit and optical transmitter for optical fiber link 有权
标题翻译：用于光纤链路的发光二极管驱动电路和光发射机
公开(公告)号：JP2005223103A
公开(公告)日：2005-08-18
申请号：JP2004028693
申请日：2004-02-04
申请人： Sharp Corp , シャープ株式会社
发明人： SHIMIZU TAKAYUKI
IPC分类号： G09G3/32 , H01L33/00 , H03K17/78 , H04B10/28 , H05B33/08 , H05B37/00
CPC分类号： H05B33/0818 , H05B33/0854 , Y02B20/347
摘要： PROBLEM TO BE SOLVED: To provide an LED drive circuit with which the consumption current can be reduced and the speed up of light emission of LED is readily made high, and to provide an optical transmitter for optical fiber link which uses the circuit. SOLUTION: The LED drive circuit 10 is provided with a current mirror circuit 6 formed of n-channel MOS transistors 4 and 5 to which mutual gates are connected, a constant-current source 12 for supplying a drive-current for driving LED 17 to the n-channel MOS transistor 4, an LED connection terminal 16 connected to the n-channel MOS transistor 5 for connecting LED 17, an input terminal 14 and inverters 1 to 3 for inputting an on/off signal Vd for controlling lighting/putting out LED 17 to the source of the n-channel MOS transistor 5, and a peaking circuit 7, which is connected between a drain and the source of the n channel MOS transistor 5 and generates a peaking current Ipeak for peaking current flowing in LED 17. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够降低消耗电流并且容易使LED的发光加速的LED驱动电路，并且提供使用该电路的光纤链路的光发射机。解决方案：LED驱动电路10设置有由相互连接的n沟道MOS晶体管4和5形成的电流镜电路6，用于提供用于驱动LED的驱动电流的恒流源12 17连接到n沟道MOS晶体管4，连接到用于连接LED 17的n沟道MOS晶体管5的LED连接端子16，输入端子14和反相器1至3，用于输入用于控制照明/ 将LED 17输出到n沟道MOS晶体管5的源极，以及峰化电路7，其连接在n沟道MOS晶体管5的漏极和源极之间，并产生峰值电流I峰值，用于在LED中流动的峰值电流 17.版权所有（C）2005，JPO＆NCIPI

7. 发明专利

JP2013115003A Led drive circuit and led lighting fixture 有权
标题翻译： LED驱动电路和LED照明灯具
公开(公告)号：JP2013115003A
公开(公告)日：2013-06-10
申请号：JP2011262481
申请日：2011-11-30
申请人： Sharp Corp , シャープ株式会社
发明人： KANAMORI ATSUSHI , WARITA HIROHISA , SHIMIZU TAKAYUKI
IPC分类号： H05B37/02
CPC分类号： H05B37/02 , H05B33/0815 , H05B33/0851 , Y02B20/347
摘要： PROBLEM TO BE SOLVED: To provide an LED drive circuit and an LED lighting fixture which can suppress flickering of an LED.SOLUTION: The LED drive circuit which can be connected with an AC power supply via a phase controlled dimmer and drives an LED load includes an LED current control circuit, a capacity component and a resistance component connected in series between the input of the LED current control circuit and a reference potential, a switch element connected with both ends of the resistance component, and a switch control unit which turns the switch element off for a predetermined period after the turn-on timing of the phase controlled dimmer, and turns the switch element on upon elapsing the predetermined period.
摘要翻译：要解决的问题：提供可以抑制LED的闪烁的LED驱动电路和LED照明灯具。
解决方案：可通过相位控制调光器连接交流电源并驱动LED负载的LED驱动电路包括LED电流控制电路，容量分量和电阻分量，串联连接在 LED电流控制电路和参考电位，与电阻部件的两端连接的开关元件，以及开关控制单元，其在相位控制的调光器的接通定时之后将开关元件断开预定的时间，并且转向所述开关元件在经过所述预定时段之后。版权所有（C）2013，JPO＆INPIT

8. 发明专利

JP2012230858A Led driver circuit and led luminaire 有权
标题翻译： LED驱动电路和LED路灯
公开(公告)号：JP2012230858A
公开(公告)日：2012-11-22
申请号：JP2011099534
申请日：2011-04-27
申请人： Sharp Corp , シャープ株式会社
发明人： KANAMORI ATSUSHI , WARITA HIROHISA , SHIMIZU TAKAYUKI
IPC分类号： H05B37/02
CPC分类号： H05B33/0815
摘要： PROBLEM TO BE SOLVED: To provide an LED driver circuit and an LED luminaire that suppress turning-off of a current holding unit (e.g. a triac or the like) in a phase control dimmer caused by a resonance phenomenon, within the same half-cycle of an AC voltage, and that can suppress flickering in the LED.SOLUTION: An LED driver circuit to which an AC power source is connectable through a phase control dimmer to drive an LED load, comprises a discharger for consuming energy of a resonance phenomenon generated by a dimmer capacitance component and a dimmer inductance component which the phase control dimmer has when a current holding unit of the phase control dimmer is turned on.
摘要翻译：要解决的问题：提供一种LED驱动电路和LED照明器，其抑制由共振现象引起的相位控制调光器中的电流保持单元（例如三端双向可控硅开关元件等）的相位 AC电压的半周期，并且可以抑制LED中的闪烁。解决方案：通过相位控制调光器连接到AC电源以驱动LED负载的LED驱动器电路包括用于消耗由调光电容分量和调光电感分量产生的谐振现象的能量的放电器，当相控调光器的电流保持单元导通时，相位控制调光器具有。版权所有（C）2013，JPO＆INPIT

9. 发明专利

JP2010243300A Photodetector and electronic apparatus including the same 有权
标题翻译：光电子器件和电子设备，包括它们
公开(公告)号：JP2010243300A
公开(公告)日：2010-10-28
申请号：JP2009091528
申请日：2009-04-03
申请人： Sharp Corp , シャープ株式会社
发明人： SHIMIZU TAKAYUKI , KUBO MASARU
IPC分类号： G01J3/51 , G01J5/60 , G02F1/133 , G09G3/20 , G09G3/34 , G09G3/36 , H04N9/64
摘要： PROBLEM TO BE SOLVED: To accurately detect original light intensity of environmental light, even when a light entering a photodetector is attenuated, by arranging an exterior cover, or the like, on the light-receiving surface side of the photodetector, or when a light having a specific color is attenuated. SOLUTION: The photodetector 10 includes a plurality of light-receiving elements 11 each having different spectral sensitivity characteristics, for generating each photocurrent in proportion to received light; an IV amplifier 12 for performing current/voltage conversion for each photocurrent, respectively; and an A/D converter 13 for performing analog/digital conversion of each voltage outputted from the IV amplifier 12, respectively. The photodetector, wherein an exterior cover or the like for attenuating light to the spectral sensitivity characteristic of at least one light receiving element 11 among the light-receiving elements 11, is arranged on the light-receiving surface side of the light-receiving element 11, also includes a correction operation circuit 14 for correcting for the influence of light attenuation in a digital value, by multiplying the digital value outputted from the A/D converter 13 by a correction value corresponding to each light-receiving element 11, respectively. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了准确地检测环境光的原始光强度，即使当进入光电检测器的光衰减时，通过在外部的外盖等上布置在光电检测器的受光面侧，或者当具有特定颜色的光被衰减时。解决方案：光电检测器10包括多个具有不同光谱灵敏度特性的光接收元件11，用于与所接收的光成比例地产生每个光电流; 用于分别对每个光电流进行电流/电压转换的IV放大器12; 以及用于分别对从IV放大器12输出的每个电压进行模/数转换的A / D转换器13。在光接收元件11的受光面侧配置有用于将光衰减到光接收元件11中的至少一个光接收元件11的光谱灵敏度特性的外部遮光物，还包括校正运算电路14，用于通过将从A / D转换器13输出的数字值分别乘以与每个光接收元件11相对应的校正值来校正光衰减对数字值的影响。版权所有（C）2011，JPO＆INPIT

10. 发明专利

JP2008192324A Illuminance sensor, and dimming control apparatus 有权
标题翻译：照明传感器和调光控制装置
公开(公告)号：JP2008192324A
公开(公告)日：2008-08-21
申请号：JP2007022305
申请日：2007-01-31
申请人： Sharp Corp , シャープ株式会社
发明人： SHIMIZU TAKAYUKI
IPC分类号： H05B37/02 , G01J1/42 , G01J1/44
CPC分类号： H05B33/0851 , H05B33/0818
摘要： PROBLEM TO BE SOLVED: To provide an illuminance sensor and a dimming control apparatus, which are not susceptible to noise even when the illuminance is low, in which processes for illuminance control do not influence on computation performed by the dimming control apparatus, and which is excellent in versatility. SOLUTION: This illuminance sensor includes a light receiving element 111 which outputs an electric signal corresponding to ambient light, an A/D converter 113 which converts the electric signal output from the light receiving element 111 into a digital signal, a register 114 which stores the digital signal output from the A/D converter 113 and determines the duty ratio of a PWM signal based on the digital signal, and a PWM controller 115 which outputs the PWM signal based on the duty ratio output from the register 114. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供即使照度较低也不易受噪声影响的照度传感器和调光控制装置，其中照度控制处理不影响由调光控制装置执行的计算，并且具有极好的多功能性。解决方案：该照度传感器包括输出对应于环境光的电信号的光接收元件111，将从光接收元件111输出的电信号转换为数字信号的A / D转换器113，寄存器114 其存储从A / D转换器113输出的数字信号，并且基于数字信号确定PWM信号的占空比;以及PWM控制器115，其基于从寄存器114输出的占空比来输出PWM信号。 P>版权所有（C）2008，JPO＆INPIT

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式