公开(公告)号：US10855866B2

公开(公告)日：2020-12-01

申请号：US16575457

申请日：2019-09-19

申请人： Tomohiro Sasa ,  Hiroki Shirado ,  Tadaaki Oyama ,  Tatsuya Ozaki ,  Kohsuke Nambara

发明人： Tomohiro Sasa ,  Hiroki Shirado ,  Tadaaki Oyama ,  Tatsuya Ozaki ,  Kohsuke Nambara

IPC分类号： H04N1/00

摘要： A document size detection device includes: a light source to irradiate a document with light; an imaging device to receive light reflected at the document; and circuitry to control switch on and off of the light source and movement in a sub-scanning direction of the light source, and determine a size of the document based on image data acquired by the imaging device. The circuitry is to determine a size in a main-scanning direction of the document based on: first image data acquired when the light source is switched off while the light source is at a first reading position; second image data acquired when the light source is switched on while the light source is at the first reading position; and third image data acquired when the light source is switched on while the light source is being moved from the first reading position to a second reading position.

公开(公告)号：US20200120224A1

公开(公告)日：2020-04-16

申请号：US16575457

申请日：2019-09-19

申请人： Tomohiro Sasa ,  Hiroki Shirado ,  Tadaaki Oyama ,  Tatsuya Ozaki ,  Kohsuke Nambara

发明人： Tomohiro Sasa ,  Hiroki Shirado ,  Tadaaki Oyama ,  Tatsuya Ozaki ,  Kohsuke Nambara

IPC分类号： H04N1/00

摘要： A document size detection device includes: a light source to irradiate a document with light; an imaging device to receive light reflected at the document; and circuitry to control switch on and off of the light source and movement in a sub-scanning direction of the light source, and determine a size of the document based on image data acquired by the imaging device. The circuitry is to determine a size in a main-scanning direction of the document based on: first image data acquired when the light source is switched off while the light source is at a first reading position; second image data acquired when the light source is switched on while the light source is at the first reading position; and third image data acquired when the light source is switched on while the light source is being moved from the first reading position to a second reading position.

公开(公告)号：US08711444B2

公开(公告)日：2014-04-29

申请号：US13420829

申请日：2012-03-15

申请人： Tadaaki Oyama

发明人： Tadaaki Oyama

IPC分类号： H04N1/04

CPC分类号： H05B33/0827 ,  G03G15/04054 ,  G03G15/043 ,  H04N1/40056 ,  H05B33/0818

摘要： A light-source control device includes a light source including a first light emitter for emitting light and a second light emitter for emitting light due to the light emitted by the first light emitter; a constant current unit configured to maintain a current constant that is input via the light source from a power supply; a switching unit configured to switch the current to be input to the constant current unit at a designated duty ratio and cycle; and a control unit configured to control the current applied to the light source so that a rise transition time and a fall transition time of the current applied to the light source are nearly equal to each other.

摘要翻译： 光源控制装置包括：光源，包括用于发射光的第一发光体和由于由第一光发射器发出的光而发光的第二光发射器; 恒流单元，被配置为维持经由所述光源从电源输入的电流常数; 开关单元，被配置为以指定的占空比和周期将要输入的电流切换到恒定电流单元; 以及控制单元，被配置为控制施加到光源的电流，使得施加到光源的电流的上升过渡时间和下降转变时间几乎相等。

公开(公告)号：US08537431B2

公开(公告)日：2013-09-17

申请号：US13073200

申请日：2011-03-28

申请人： Tadaaki Oyama

发明人： Tadaaki Oyama

IPC分类号： H04N1/04

CPC分类号： B41J2/45 ,  G03G15/04045 ,  G03G15/5004 ,  H05B33/0818 ,  H05B33/0827 ,  H05B33/089 ,  Y02B20/346

摘要： A light source driving device for driving plural light sources is provided. The light source driving device includes a voltage booster to boost a voltage from a power source to supply the boosted voltage to each of the plural light sources; a constant current driver to regularly hold driving current of each of the plural light sources constant; a load to consume substantially the same power as the plural light sources; and a switch to selectively connect either the load or the plural light sources with the voltage booster and the constant current driver so that the load or the plural light sources are interposed between the voltage booster and the constant current driver.

摘要翻译： 提供了用于驱动多个光源的光源驱动装置。 光源驱动装置包括升压器，用于升压来自电源的电压，以将升压电压提供给多个光源中的每一个; 定时保持多个光源中的每一个的驱动电流恒定的恒定电流驱动器; 消耗与多个光源基本相同的功率的负载; 以及开关，其选择性地将负载或多个光源与升压器和恒流驱动器连接，使得负载或多个光源插入在升压器和恒流驱动器之间。

公开(公告)号：US20120236373A1

公开(公告)日：2012-09-20

申请号：US13420829

申请日：2012-03-15

申请人： Tadaaki Oyama

发明人： Tadaaki Oyama

IPC分类号： H04N1/04 ,  G03G15/043 ,  H05B37/02

CPC分类号： H05B33/0827 ,  G03G15/04054 ,  G03G15/043 ,  H04N1/40056 ,  H05B33/0818

摘要： A light-source control device includes a light source including a first light emitter for emitting light and a second light emitter for emitting light due to the light emitted by the first light emitter; a constant current unit configured to maintain a current constant that is input via the light source from a power supply; a switching unit configured to switch the current to be input to the constant current unit at a designated duty ratio and cycle; and a control unit configured to control the current applied to the light source so that a rise transition time and a fall transition time of the current applied to the light source are nearly equal to each other.

摘要翻译： 光源控制装置包括：光源，包括用于发射光的第一发光体和由于由第一光发射器发出的光而发光的第二光发射器; 恒流单元，被配置为维持经由所述光源从电源输入的电流常数; 开关单元，被配置为以指定的占空比和周期将要输入的电流切换到恒定电流单元; 以及控制单元，被配置为控制施加到光源的电流，使得施加到光源的电流的上升过渡时间和下降转变时间几乎相等。

公开(公告)号：US09426318B2

公开(公告)日：2016-08-23

申请号：US14633464

申请日：2015-02-27

申请人： Masatoshi Ishida ,  Tadaaki Oyama

发明人： Masatoshi Ishida ,  Tadaaki Oyama

IPC分类号： H04N1/04 ,  H04N1/00 ,  H04N1/10

CPC分类号： H04N1/00713 ,  H04N1/00737 ,  H04N1/00755 ,  H04N1/1043 ,  H04N1/1061 ,  H04N2201/0081

摘要： An image reader unit includes a platen on which to place a document; a light source including a plurality of split light sources to emit light beams toward a surface of the document; a movable exposure unit moving in a sub-scanning direction while obtaining reflected light reflected from the surface of the document; an image sensor to scan an image of the document by receiving the reflected light; and a reader processor to identify a length of the document in the main scanning direction based on a received light quantity from the image sensor obtained by activating fewer than all of the plurality of split light sources necessary for identifying the length of the document in the main scanning direction while moving the movable exposure unit in the sub-scanning direction.

摘要翻译： 图像读取器单元包括在其上放置文档的压板; 光源，其包括朝向所述文件的表面发射光束的多个分离光源; 可动曝光单元，沿着副扫描方向移动，同时获得从文件表面反射的反射光; 图像传感器，用于通过接收反射光来扫描文档的图像; 以及读取器处理器，用于基于来自所述图像传感器的接收光量来识别所述文档在所述主扫描方向上的长度，所述接收光量通过激活少于所有所述多个所述分割光源，所述多个分割光源用于识别所述主体中的所述文档的长度 同时在副扫描方向上移动可动曝光单元。