公开(公告)号：US09196201B2

公开(公告)日：2015-11-24

申请号：US13830546

申请日：2013-03-14

申请人： SEIKO EPSON CORPORATION

发明人： Keitaro Fujimori ,  Takafumi Sano

IPC分类号： G09G3/34 ,  G09G3/20

CPC分类号： G09G3/344 ,  G09G3/2007 ,  G09G2300/0842 ,  G09G2310/06

摘要： A method for controlling an electro-optic device includes a third, a fourth, a first, and a second control steps of supplying a third, a fourth, a first, and a second voltage pulse, in this order. In the first control step, a first limit optical state is reached. In the second control step, a first intermediate optical state is reached. The period of each of the third control step and the fourth control step is set to satisfy a relation W (A→B)=−W (B→A), where W (A→B) is an integrated value of drive voltage and drive time when changing the pixel from an optical state A to an optical state B, and W (B→A) is an integrated value of drive voltage and drive time when changing the pixel from the optical state B to the optical state A.

摘要翻译： 一种用于控制电光装置的方法包括依次提供第三，第四，第一和第二电压脉冲的第三，第四，第一和第二控制步骤。 在第一控制步骤中，达到第一极限光学状态。 在第二控制步骤中，达到第一中间光学状态。 将第三控制步骤和第四控制步骤中的每一个的周期设定为满足W（A→B）= -W（B→A）的关系，其中W（A→B）是驱动电压的积分值， 将像素从光学状态A改变为光学状态B时的驱动时间，W（B→A）是将像素从光学状态B改变为光学状态A时的驱动电压和驱动时间的积分值。

公开(公告)号：US10326903B2

公开(公告)日：2019-06-18

申请号：US15714471

申请日：2017-09-25

申请人： SEIKO EPSON CORPORATION

发明人： Takafumi Sano

IPC分类号： H04N1/193 ,  H04N1/40 ,  H04N5/369 ,  H04N5/378

摘要： Each of a plurality of image reader chips included in an image reader device includes: a readout circuit that reads out a pixel signal output from a pixel portion; a transfer interconnect; an output circuit that outputs the pixel signal; a capacitor that is selectively connected between the transfer interconnect and the output circuit; and a constant voltage circuit. The constant voltage circuit is selectively connected to a first terminal of the capacitor via the output circuit.

公开(公告)号：US10075608B2

公开(公告)日：2018-09-11

申请号：US15602624

申请日：2017-05-23

申请人： Seiko Epson Corporation

发明人： Takafumi Sano

IPC分类号： H04N1/04 ,  H04N1/193 ,  H04N1/03 ,  H01L27/146

CPC分类号： H04N1/1931 ,  H01L27/14612 ,  H04N1/03

摘要： An image reading apparatus which reads an image includes a first pixel that includes a first light receiving element which performs photoelectric conversion; a second pixel that includes a second light receiving element which performs photoelectric conversion; a first reading circuit that includes a first capacitor which is electrically connected to the first pixel and a first amplifier having an input terminal which is electrically connected to the first capacitor; a second reading circuit that includes a second capacitor which is electrically connected to the second pixel, a second amplifier, and a first switch which switches whether or not to electrically connect the second capacitor to an input terminal of the second amplifier; and a second switch that switches whether or not to electrically connect a first node between the first capacitor and the first amplifier to a second node between the second capacitor and the second amplifier.

公开(公告)号：US09912887B2

公开(公告)日：2018-03-06

申请号：US15366092

申请日：2016-12-01

申请人： SEIKO EPSON CORPORATION

发明人： Takafumi Sano

IPC分类号： H04N1/04 ,  H04N5/355 ,  H04N1/031 ,  H04N5/3745

CPC分类号： H04N5/3559 ,  H04N1/031 ,  H04N5/3694 ,  H04N5/37457 ,  H04N5/378 ,  H04N2201/0081

摘要： An image reading apparatus for reading an image includes a light receiving element that receives light from the image so as to perform photoelectric conversion, an amplifier which is electrically connected to the light receiving element, and amplifies a signal generated by photoelectric conversion, a switch element which is electrically connected to both ends of the amplifier so as to be parallel to the amplifier, a first capacitance which are electrically connected to both ends of the amplifier so as to be parallel to the amplifier, and a second capacitance which has one end which is electrically connected to one end of the light receiving element and one end of the amplifier. A second signal of which potential is changed after potential of a first signal input to a control terminal of the switch element is changed is applied to another end of the second capacitance.

公开(公告)号：US09539804B2

公开(公告)日：2017-01-10

申请号：US14950495

申请日：2015-11-24

申请人： Seiko Epson Corporation

发明人： Takafumi Sano

IPC分类号： B41J2/045 ,  B41J2/14

CPC分类号： B41J2/04541 ,  B41J2/04581 ,  B41J2/14233 ,  B41J2002/14491

摘要： There is provided a liquid discharging apparatus including: a modulation portion which generates a modulation signal pulse-modulated from a source signal; a gate driver which generates an amplification control signal based on the modulation signal; a boosting circuit which boosts and supplies a voltage to the gate driver; a transistor which generates an amplification modulation signal amplified from the modulation signal based on the amplification control signal; a low pass filter which demodulates the amplification modulation signal and generates a driving signal; and a piezoelectric element which is displaced as the driving signal is applied, in which the gate driver and the boosting circuit are electrically connected to a common ground terminal, and in which a wiring impedance between the ground terminal and the gate driver is smaller than a wiring impedance between the ground terminal and the boosting circuit.

摘要翻译： 提供了一种液体排放装置，包括：调制部分，其产生从源信号脉冲调制的调制信号; 栅极驱动器，其基于所述调制信号产生放大控制信号; 升压电路，其向所述栅极驱动器提供电压并提供电压; 晶体管，其基于放大控制信号生成从调制信号放大的放大调制信号; 低通滤波器，其解调放大调制信号并产生驱动信号; 以及作为驱动信号被施加的位移的压电元件，其中栅极驱动器和升压电路电连接到公共接地端子，并且其中接地端子和栅极驱动器之间的布线阻抗小于 接地端子和升压电路之间的接线阻抗。

公开(公告)号：US09912828B2

公开(公告)日：2018-03-06

申请号：US15361884

申请日：2016-11-28

申请人： SEIKO EPSON CORPORATION

发明人： Takafumi Sano

IPC分类号： H04N1/04 ,  H04N1/031 ,  H04N1/028 ,  H04N1/48 ,  H04N5/374 ,  H04N5/369 ,  H04N5/378

CPC分类号： H04N1/031 ,  H04N1/02835 ,  H04N1/48 ,  H04N1/484 ,  H04N5/3692 ,  H04N5/374 ,  H04N5/378 ,  H04N2201/0081

摘要： An image reading apparatus includes a light receiving element configured to receive light from an image to perform photoelectric conversion, an amplification unit configured to amplify a signal generated by the photoelectric conversion, a switch element electrically connected to first and second ends of the amplification unit to be in parallel with the amplification unit, and a capacitor. The capacitor is electrically connected to the first and second ends of the amplification unit to be in parallel with to the amplification unit, and includes a first wire electrically connecting a first end of the light receiving element, the first end of the amplification unit, and a first end of the switch element, and a second wire electrically connecting the second end of the amplification unit and a second end of the switch element. The capacitor includes capacitance that is interconnect capacitance between the first and second wires.

公开(公告)号：US09555624B2

公开(公告)日：2017-01-31

申请号：US15000130

申请日：2016-01-19

申请人： Seiko Epson Corporation

发明人： Takafumi Sano

IPC分类号： B41J2/045

CPC分类号： B41J2/04541 ,  B41J2/04501 ,  B41J2/0457 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/0459

摘要： A liquid discharging apparatus includes a modulation portion that generates a modulation signal obtained by pulse-modulating a source signal; a switching element that generates an amplification modulation signal obtained by amplifying the modulation signal; a low-pass filter that generates a driving signal by demodulating the amplification modulation signal; a piezoelectric element that is displaced by applying the driving signal; a selection portion that is configured to include a transistor and selects whether or not the driving signal is applied to the piezoelectric element; and a detection portion that detects lowering of a power source voltage supplied to the selection portion. The detection portion performs control for lowering a voltage of the driving signal if lowering of the power source voltage is detected.

摘要翻译： 液体排出装置包括：调制部，其生成通过对源极信号进行脉冲调制而得到的调制信号; 开关元件，其生成通过放大调制信号而获得的放大调制信号; 低通滤波器，通过解调放大调制信号产生驱动信号; 通过施加驱动信号而移位的压电元件; 选择部，被配置为包括晶体管，并选择驱动信号是否施加到所述压电元件; 以及检测部，其检测供给到所述选择部的电源电压的下降。 如果检测到电源电压降低，则检测部分执行用于降低驱动信号的电压的控制。

公开(公告)号：US09475284B2

公开(公告)日：2016-10-25

申请号：US15003165

申请日：2016-01-21

申请人： Seiko Epson Corporation

发明人： Takafumi Sano

IPC分类号： B41J2/045 ,  H03F3/217

CPC分类号： B41J2/04541 ,  B41J2/0455 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/04593 ,  B41J2/04596 ,  H03F3/217

摘要： A liquid discharging apparatus includes a modulation portion that generates a modulation signal obtained by pulse-modulating a source signal; an amplifier that includes a first transistor and a second transistor operating based on the modulation signal; an operation control portion that controls operations of the amplifier; a low-pass filter that generates a driving signal by demodulating an amplification modulation signal generated based on operations of the first transistor and the second transistor; and a piezoelectric element that is displaced by applying the driving signal. The operation control portion performs a stopping process that stops an operation of the amplifier by allowing the first transistor to be in a non-conductive state in which a current does not flow through the first transistor and the second transistor to be in a conductive state in which the current flows through the second transistor.

摘要翻译： 液体排出装置包括：调制部，其生成通过对源极信号进行脉冲调制而得到的调制信号; 放大器，其包括基于所述调制信号工作的第一晶体管和第二晶体管; 操作控制部，其控制放大器的动作; 低通滤波器，通过解调基于第一晶体管和第二晶体管的操作产生的放大调制信号来产生驱动信号; 以及通过施加驱动信号而移位的压电元件。 操作控制部分执行停止处理，该停止处理通过使第一晶体管处于非导通状态来停止放大器的操作，其中电流不通过第一晶体管并且第二晶体管处于导通状态 电流流过第二晶体管。

公开(公告)号：US09573366B2

公开(公告)日：2017-02-21

申请号：US14929761

申请日：2015-11-02

申请人： Seiko Epson Corporation

发明人： Takafumi Sano

IPC分类号： B41J2/045

CPC分类号： B41J2/04541 ,  B41J2/04548 ,  B41J2/04551 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/04593 ,  B41J2/04596

摘要： There is provided a liquid discharging apparatus including: an original driving signal generation portion which generates an original driving signal based on a source signal; a driving signal generation portion which generates a driving signal based on the original driving signal; a reference voltage generation portion which generates a first reference voltage and a second reference voltage adjusted based on an adjustment signal, and supplies the voltage to the original driving signal generation portion; a piezoelectric element which is displaced as the driving signal is applied; a cavity; and a nozzle, and discharges the liquid inside the cavity as liquid droplets in accordance with the change in the internal volume of the cavity, in which adjustment resolution of the first reference voltage is lower than adjustment resolution of the second reference voltage.

摘要翻译： 提供了一种液体排放装置，包括：原始驱动信号产生部分，其基于源信号产生原始驱动信号; 驱动信号生成部，其基于原始驱动信号生成驱动信号; 参考电压产生部分，其产生基于调整信号调整的第一参考电压和第二参考电压，并将电压提供给原始驱动信号产生部分; 作为驱动信号被施加的位移的压电元件; 一个空腔 和喷嘴，并且根据空腔的内部体积的变化，将腔内的液体作为液滴排出，其中第一参考电压的调节分辨率低于第二参考电压的调节分辨率。

公开(公告)号：US09475283B2

公开(公告)日：2016-10-25

申请号：US15001619

申请日：2016-01-20

申请人： Seiko Epson Corporation

发明人： Takafumi Sano

IPC分类号： B41J29/38 ,  B41J2/045

CPC分类号： B41J2/04541 ,  B41J2/04548 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/04593 ,  B41J2/04596

摘要： A liquid discharging apparatus includes a modulation portion that generates a modulation signal obtained by pulse-modulating a source signal; an amplifier that includes a first gate driver generating a first amplification control signal based on the modulation signal, a second gate driver generating a second amplification control signal based on the modulation signal, a first transistor operating based on the first amplification control signal, a second transistor connected to the first transistor on a low-potential side in series and operating based on the second amplification control signal; an operation control portion that controls operations of the first gate driver and the second gate driver; a low-pass filter that generates a driving signal by demodulating an amplification modulation signal generated based on operations of the first transistor and the second transistor; and a piezoelectric element that is displaced by applying the driving signal.

摘要翻译： 液体排出装置包括：调制部，其生成通过对源极信号进行脉冲调制而得到的调制信号; 放大器，其包括基于调制信号产生第一放大控制信号的第一栅极驱动器，基于调制信号产生第二放大控制信号的第二栅极驱动器，基于第一放大控制信号工作的第一晶体管，第二栅极驱动器 晶体管串联连接到低电位侧的第一晶体管，并基于第二放大控制信号进行工作; 操作控制部分，其控制第一栅极驱动器和第二栅极驱动器的操作; 低通滤波器，通过解调基于第一晶体管和第二晶体管的操作产生的放大调制信号来产生驱动信号; 以及通过施加驱动信号而移位的压电元件。