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1. 发明授权

US08213247B2 Memory device with test mechanism 有权
标题翻译：带测试机构的内存设备
公开(公告)号：US08213247B2
公开(公告)日：2012-07-03
申请号：US12618827
申请日：2009-11-16
申请人： Tomomi Naka , Hajime Sakata
发明人： Tomomi Naka , Hajime Sakata
IPC分类号： G11C29/00
CPC分类号： G11C29/50 , G11C29/12005 , G11C2029/5006
摘要： A semiconductor memory device includes a plurality of memory cell transistors arranged in a matrix and each configured to store data, and a test circuit configured to output to outside the semiconductor memory device an output signal indicative of an amount of test current flowing through a selected one of the plurality of memory cell transistors, wherein the test circuit includes a plurality of reference cell transistors employed to successively produce varying amounts of currents, a comparison circuit configured to successively compare the amount of test current with each of the varying amounts of currents, and a code generating circuit configured to generate a code indicative of a result of the successive comparisons performed by the comparison circuit, wherein the code is output as the output signal.
摘要翻译：半导体存储器件包括以矩阵形式布置并分别被配置为存储数据的多个存储单元晶体管，以及测试电路，被配置为向半导体存储器件外部输出指示流过所选择的测试电流量的输出信号所述多个存储单元晶体管中的所述测试电路包括用于连续产生不同数量电流的多个参考单元晶体管;比较电路，被配置为连续地将所述测试电流的量与所述不同量的电流中的每一个进行比较;以及代码生成电路，被配置为生成表示由所述比较电路执行的连续比较的结果的代码，其中所述代码被输出作为所述输出信号。

2. 发明授权

US07039077B2 Optical wavelength converting apparatus, and optical wavelength converting method 失效
标题翻译：光波长转换装置和光波长转换方法
公开(公告)号：US07039077B2
公开(公告)日：2006-05-02
申请号：US10620419
申请日：2003-07-17
申请人： Yukio Furukawa , Hajime Sakata
发明人： Yukio Furukawa , Hajime Sakata
IPC分类号： H01S3/10
CPC分类号： G02F1/3534 , G02F1/3558
摘要： An optical wavelength converting apparatus includes a first semiconductor laser, a second semiconductor laser, and a wavelength converting element for converting first and second laser light from the first and second semiconductor lasers to sum frequency light. In this apparatus, the first semiconductor laser and the wavelength converting element are arranged so as to establish an external resonator structure in which the first laser light can be put under a resonant condition, and an optical path of the second laser light is so determined that the second laser light can propagate through the wavelength converting element.
摘要翻译：光波长转换装置包括第一半导体激光器，第二半导体激光器和用于将来自第一和第二半导体激光器的第一和第二激光转换为和频光的波长转换元件。在该装置中，第一半导体激光器和波长转换元件被布置成建立其中可以将第一激光置于共振条件下的外部谐振器结构，并且确定第二激光的光路，使得第二激光可以通过波长转换元件传播。

3. 发明授权

US06987785B2 Harmonic generator, method for driving harmonic generator, image-displaying apparatus, image-forming apparatus, optical storage apparatus that employs harmonic generator 失效
公开(公告)号：US06987785B2
公开(公告)日：2006-01-17
申请号：US10404057
申请日：2003-04-02
申请人： Hajime Sakata , Yukio Furukawa
发明人： Hajime Sakata , Yukio Furukawa
IPC分类号： H01S3/10
CPC分类号： B82Y20/00 , G02F1/353 , G02F1/3556 , H01S5/06213 , H01S5/0622 , H01S5/125 , H01S5/32366 , H01S5/34306
摘要： There is provided a harmonic generator generates high power laser light and can be modulated at high modulation rate. The semiconductor laser emits a first output light when a bias current is supplied, and a second output light when a modulating current is superposed to the bias current. On of the first output lights has a wavelength inside of a wavelength tolerance of phase-matching of the wavelength-converting element. The other has a wavelength outside of the wavelength tolerance of phase-matching.

4. 发明申请

US20050254531A1 Light wavelength converting apparatus, control method of the same, and image projecting apparatus using the same 失效
标题翻译：光波长变换装置及其控制方法以及使用其的图像投影装置
公开(公告)号：US20050254531A1
公开(公告)日：2005-11-17
申请号：US11120950
申请日：2005-05-04
申请人： Yukio Furukawa , Hajime Sakata , Kazunari Fujii
发明人： Yukio Furukawa , Hajime Sakata , Kazunari Fujii
IPC分类号： G02B26/10 , G02F1/377 , H01S3/10 , H01S5/00 , H01S5/02 , H01S5/06 , H01S5/0625 , H01S5/0687 , H01S5/125
CPC分类号： H01S5/06256 , H01S5/005 , H01S5/0092 , H01S5/02248 , H01S5/0617 , H01S5/06804
摘要： A light wavelength converting apparatus includes a semiconductor laser having a gain region, a phase region, and a distributed Bragg reflection (DBR) region, a nonlinear optical device for receiving fundamental-wave light emitted from the semiconductor laser and outputting second harmonic wave light, a first optical detector for monitoring an output of the fundamental-wave light, a second optical detector for monitoring the second harmonic wave light, and a control portion for controlling at least a drive current for driving the semiconductor laser. The control portion includes a control parameter determiner, and a wavelength controller. The control parameter determiner changes a DBR current supplied to the DBR region and a phase current supplied to the phase region to obtain a changing point that corresponds to a discontinuous change in an electrical signal from the first optical detector, and determines a control parameter for controlling the DBR current and the phase current such that the relationship between the DBR current and the phase current is not located on the changing point. The wavelength controller controls the DBR current and the phase current pursuant to the control parameter such that an oscillation wavelength of the semiconductor laser can be continuously controlled.
摘要翻译：光波长转换装置包括具有增益区域，相位区域和分布布拉格反射区域的半导体激光器，用于接收从半导体激光器发射的基波光并输出二次谐波光的非线性光学装置，用于监视基波输出的第一光检测器，用于监测第二谐波光的第二光检测器，以及用于至少控制用于驱动半导体激光器的驱动电流的控制部分。控制部分包括控制参数确定器和波长控制器。控制参数确定器改变提供给DBR区域的DBR电流和提供给相位区域的相电流，以获得对应于来自第一光学检测器的电信号的不连续变化的变化点，并且确定用于控制的控制参数 DBR电流和相电流使得DBR电流和相电流之间的关系不位于变化点上。波长控制器根据控制参数控制DBR电流和相电流，使得能够连续地控制半导体激光器的振荡波长。

5. 发明授权

US5473448A Display device having a mesomorphic diffraction grating layer adjacent a polymer dispersed layer 失效
$Display device having a mesomorphic diffraction grating layer adjacent a polymer dispersed layer$
标题翻译：具有邻近聚合物分散层的介晶衍射光栅层的显示装置
公开(公告)号：US5473448A
公开(公告)日：1995-12-05
申请号：US408200
申请日：1995-03-21
申请人： Kazuo Yoshinaga , Hajime Sakata , Yomishi Toshida , Toshikazu Ohnishi , Koichi Sato , Takeo Eguchi , Tsuyoshi Shibata
发明人： Kazuo Yoshinaga , Hajime Sakata , Yomishi Toshida , Toshikazu Ohnishi , Koichi Sato , Takeo Eguchi , Tsuyoshi Shibata
IPC分类号： G02B5/18 , C09K19/54 , G02F1/1333 , G02F1/1334 , G02F1/1335 , G02F1/1347 , G02F1/13 , G02F1/133 , G02F1/137
CPC分类号： C09K19/544 , G02F1/13476 , G02F1/1334 , G02F2201/305
摘要： A display device is constituted by disposing a first display layer and a second display layer between a pair of electrode plates including at least one transparent electrode plate. The first display layer contains a low-molecular weight mesomorphic compound dispersed in or impregnating a polymer matrix. The second display layer is formed by disposing a diffraction grating and being filled with the low-molecular weight mesomorphic compound. The display device is incorporated in a display apparatus to effect a good display with a high contrast ratio.
摘要翻译：显示装置通过在包括至少一个透明电极板的一对电极板之间布置第一显示层和第二显示层而构成。第一显示层包含分散在或浸渍聚合物基质中的低分子量介晶化合物。第二显示层通过设置衍射光栅并填充低分子量介晶化合物而形成。显示装置并入显示装置中以实现高对比度的良好显示。

6. 发明授权

US5148302A Optical modulation element having two-dimensional phase type diffraction grating 失效
$Optical modulation element having two-dimensional phase type diffraction grating$
标题翻译：具有二维相位衍射光栅的光调制元件
公开(公告)号：US5148302A
公开(公告)日：1992-09-15
申请号：US771532
申请日：1991-10-07
申请人： Akihiko Nagano , Etsuro Kishi , Ryoji Fujiwara , Yukitoshi Ohkubo , Michiyo Nishimura , Hajime Sakata , Takayuki Ishii , Masato Yamanobe
发明人： Akihiko Nagano , Etsuro Kishi , Ryoji Fujiwara , Yukitoshi Ohkubo , Michiyo Nishimura , Hajime Sakata , Takayuki Ishii , Masato Yamanobe
IPC分类号： G02B5/18 , G02F1/1333 , G02F1/29
CPC分类号： G02F1/292 , G02B5/1828 , G02F1/133371 , G02F2201/305 , G02F2203/22
摘要： An optical modulation element characterized in that a two-dimensional phase type diffraction gratings, whose refractive index changes for each predetermined period along two different directions in a predetermined plane, is adopted, and a changing state of the refractive index is controlled to change characteristics of the diffraction grating, so that a diffraction phenomenon of light incident on the element is controlled.
摘要翻译：一种光调制元件，其特征在于，采用其在预定平面中沿着两个不同方向的折射率每个预定周期变化的二维相位衍射光栅，并且控制折射率的改变状态以改变衍射光栅，从而控制入射到元件上的光的衍射现象。

7. 发明授权

US5131060A Optical waveguide modulator communications device and method of modulating light using same 失效
标题翻译：光波导调制器通信装置和使用其调制光的方法
公开(公告)号：US5131060A
公开(公告)日：1992-07-14
申请号：US727072
申请日：1991-07-09
申请人： Hajime Sakata
发明人： Hajime Sakata
IPC分类号： G02F1/313
CPC分类号： G02F1/3133 , G02F2001/3135 , G02F2201/302 , G02F2203/055
摘要： An optical modulator includes a substrate, a first waveguide layer formed on the substrate, a second waveguide layer stacked together with the first waveguide layer in a direction of a thickness thereof on the substrate, the second waveguide layer having a waveguide mode different from that of the first waveguide layer, a diffraction grating formed in a region where the waveguide modes of the first and second waveguide layers overlap each other, and an electrode. When the electrical signal is applied through the electrode, the wavelength of the light coupled by the diffraction grating is changed, and light output from the second waveguide layer is modulated in accordance with the electrical signal. A method of modulating light using the above optical modulator is also disclosed.

8. 发明授权

US4926177A Optical analog-digital converter provided with a nonlinear optical element and an optical feedback system for the output lights of said element 失效
标题翻译：具有非线性光学元件的光模拟数字转换器和用于所述元件的输出光的光学反馈系统
公开(公告)号：US4926177A
公开(公告)日：1990-05-15
申请号：US195950
申请日：1988-05-19
申请人： Hajime Sakata
发明人： Hajime Sakata
IPC分类号： G02F7/00
CPC分类号： G02F7/00
摘要： An optical analog-digital converter comprises a nonlinear optical element having a threshold value for the intensity of an input light and producing a first and a second output light from the input light with the threshold value as a reference. The optical element produces a first output light of intensity corresponding to a digital signal meaning the digital 0 and a second output light of intensity proportional to the input light intensity when the intensity of the input light is smaller than the threshold value, and produces a first output light of an intensity corresponding to a digital signal meaning the digit 1 and a second output light of intensity equal to the input light intensity minus the threshold value when the intensity of the input light is greater than the threshold value. A device inputs to the nonlinear optical element a light having an intensity distribution corresponding to an analog signal, an optical feedback system causes the second output light of the nonlinear optical element produced from the input light to be again input to the nonlinear optical element, and a device provided in the feedback system amplifiers the second output light.
摘要翻译：光学模拟数字转换器包括具有用于输入光的强度的阈值的非线性光学元件，并且以阈值作为基准产生来自输入光的第一和第二输出光。所述光学元件产生与数字信号相对应的强度的第一输出光，所述数字信号意味着数字0，以及当输入光的强度小于阈值时与输入光强度成比例的强度的第二输出光，并且产生第一当输入光的强度大于阈值时，输出对应于意指数字1的数字信号的强度的输出光和等于输入光强度减去阈值的强度的第二输出光。一种设备向非线性光学元件输入具有对应于模拟信号的强度分布的光，光学反馈系统使得从输入光产生的非线性光学元件的第二输出光再次输入到非线性光学元件，并且设置在反馈系统中的装置对第二输出光进行放大。

9. 发明授权

US4850681A Optical modulation device 失效
标题翻译：光调制装置
公开(公告)号：US4850681A
公开(公告)日：1989-07-25
申请号：US33773
申请日：1987-04-03
申请人： Masao Yamanobe , Yasuyuki Watanabe , Hajime Sakata , Yukitoshi Ohkubo , Tomoyuki Umezawa , Chiori Mochizuki , Kazuya Ishiwata , Takayuki Ishii , Akihiko Nagano , Etsuro Kishi , Ryoji Fujiwara
发明人： Masao Yamanobe , Yasuyuki Watanabe , Hajime Sakata , Yukitoshi Ohkubo , Tomoyuki Umezawa , Chiori Mochizuki , Kazuya Ishiwata , Takayuki Ishii , Akihiko Nagano , Etsuro Kishi , Ryoji Fujiwara
IPC分类号： G02F1/1333 , G02F1/29
CPC分类号： G02F1/133371 , G02F1/292 , G02F2201/305 , G02F2203/22
摘要： An optical modulation device for effecting optical modulation by controlling the diffraction phenomenon of light, which not only consumes a small amouhnt of the driving energy employed, such as a electric power, but which is also capable of improvements in reliability.
摘要翻译：一种用于通过控制光的衍射现象来实现光调制的光调制装置，其不仅消耗了诸如电力之类的驱动能量的小型，而且还能够提高可靠性。

10. 发明授权

US07411992B2 Light wavelength converting apparatus, control method of the same, and image projecting apparatus using the same 失效
标题翻译：光波长变换装置及其控制方法以及使用其的图像投影装置
公开(公告)号：US07411992B2
公开(公告)日：2008-08-12
申请号：US11120950
申请日：2005-05-04
申请人： Yukio Furukawa , Hajime Sakata , Kazunari Fujii
发明人： Yukio Furukawa , Hajime Sakata , Kazunari Fujii
IPC分类号： H01S3/08
CPC分类号： H01S5/06256 , H01S5/005 , H01S5/0092 , H01S5/02248 , H01S5/0617 , H01S5/06804
摘要： A light wavelength converting apparatus includes a semiconductor laser having gain, phase, and DBR regions, a nonlinear optical device for receiving fundamental-wave light emitted from the semiconductor laser and outputting second harmonic wave light, a first optical detector for monitoring output of the fundamental-wave light, a second optical detector for monitoring the second harmonic wave light, and a control portion for controlling a drive current for driving the semiconductor laser. The control portion includes a control parameter determiner and wavelength controller. The control parameter determiner changes a DBR current supplied to the DBR region and a phase current supplied to the phase region to obtain a changing point, and determines a control parameter for controlling the DBR and phase currents such that the relationship therebetween is not located on the changing point. The wavelength controller controls the DBR and phase currents pursuant to the control parameter.
摘要翻译：光波长转换装置包括具有增益，相位和DBR区域的半导体激光器，用于接收从半导体激光器发射的基波并输出二次谐波光的非线性光学装置，用于监视基波的输出的第一光学检测器波光，用于监测二次谐波光的第二光检测器，以及用于控制用于驱动半导体激光器的驱动电流的控制部分。控制部分包括控制参数确定器和波长控制器。控制参数确定器改变提供给DBR区域的DBR电流和提供给相位区域的相电流以获得改变点，并且确定用于控制DBR和相电流的控制参数，使得它们之间的关系不位于变化点波长控制器根据控制参数控制DBR和相电流。

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