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    • 42. 发明授权
    • Digital data comparator and microprocessor
    • 数字数据比较器和微处理器
    • US5957996A
    • 1999-09-28
    • US982299
    • 1997-12-01
    • Mikio Shiraishi
    • Mikio Shiraishi
    • G06F7/02G06F7/00G06F7/50
    • G06F7/026
    • The present invention provides a digital data comparator having a first selective data inverting circuit inverting a first input data when the sign of the first input data is negative, or outputting the first input data when the sign is positive, a first adding circuit coupled to an output of the first selective data inverting circuit, adding one to the least significant bit when the sign of the first input data is negative, or outputting the first input data when the sign is positive, a second selective data inverting circuit inverting a second input data when the sign of the second input data is positive, or outputting the second input data when the sign is negative, and a second adding circuit adding an output of the first adding circuit and an output of the second selective data inverting circuit.
    • 本发明提供了一种数字数据比较器,当第一输入数据的符号为负时,第一选择数据反相电路使第一输入数据反相,或当符号为正时输出第一输入数据,第一加法电路耦合到 第一选择数据反相电路的输出,当第一输入数据的符号为负时将一个加到最低有效位,或当符号为正时输出第一输入数据,第二选择数据反相电路将第二输入数据 当第二输入数据的符号为正时,或者当符号为负时输出第二输入数据,以及第二加法电路,将第一加法电路的输出和第二选择数据反相电路的输出相加。
    • 44. 发明授权
    • Parallel adder circuit with sign bit decoder for multiplier
    • 并行加法电路,带符号位解码器,用于乘法器
    • US4879677A
    • 1989-11-07
    • US171105
    • 1988-03-21
    • Mikio Shiraishi
    • Mikio Shiraishi
    • G06F7/53G06F7/52G06F7/533
    • G06F7/5318G06F7/49994G06F7/5338
    • A parallel adder circuit includes a partial product adding circuit for adding one-bit partial products together in order total to a plurality of partial products, and sign bit decoder circuit for decoding sign bits of a given bit number to provide a total sum of the sign bits, and supply this total sum to the partial product adding circuit at given bits. In a multiplier utilizing Booth's algorithm, a decoder circuit is used for decoding sign bits of the partial product to provide the total sum of all the sign bits, and a decoded output is supplied to the partial product adding circuit. Therefore, the number of higher bit inputs can be reduced and the number of full adders in the partial product adding circuit can be decreased.
    • 一个并行加法器电路包括一个部分乘积加法电路,用于将多个部分乘积的总和相加一位部分乘积,以及用于解码给定位数的符号位的符号位解码器电路,以提供符号的总和 位,并以给定位将该总和提供给部分积添加电路。 在使用Booth算法的乘法器中,解码器电路用于对部分积的符号位进行解码,以提供所有符号位的总和,并将解码输出提供给部分乘积加法电路。 因此,可以减少较高位输入的数量,并且可以减少部分积添加电路中的全加法器的数量。
    • 48. 发明申请
    • Optical apparatus
    • 光学仪器
    • US20090059180A1
    • 2009-03-05
    • US12289018
    • 2008-10-17
    • Kenji FuseMikio ShiraishiYasuo OtsukaNobuyuki KakuHidehiro Ikeda
    • Kenji FuseMikio ShiraishiYasuo OtsukaNobuyuki KakuHidehiro Ikeda
    • G03B21/16
    • G03B21/16H04N9/3105H04N9/3144
    • A projection type display apparatus includes a housing having a first side on which an air intake opening is arranged and a second side on which an air exhaust opening is arranged, a light source for supplying light, and a light valve device which modulates the light output from the light source. A first fan is provided which draws air from the air intake opening into the housing, and a first ventilation path is coupled with the air intake opening so as to lead air flow from the air intake opening toward a lower portion of the light valve. A second ventilation path is formed from the lower portion of the light valve to an upper portion of the light valve, and a second fan is provided which draws out air flowing from the second ventilation path through the air exhaust opening to outside of the housing.
    • 一种投影型显示装置,具备:具有配置有吸气口的第一面和配置有排气口的第二面的壳体,供给光的光源和调制光输出的光阀装置 从光源。 提供了一种第一风扇,其将空气从进气口吸入壳体中,并且第一通风路径与进气口结合,以便将空气从进气口朝向光阀的下部引导。 第二通风路径由光阀的下部形成到光阀的上部,并且设置有第二风扇,其将从第二通气路径通过排气口的空气抽出到壳体的外部。
    • 49. 发明授权
    • Projector having an image display element
    • 具有图像显示元件的投影仪
    • US07293878B2
    • 2007-11-13
    • US10964631
    • 2004-10-15
    • Tatsuo MoritaMikio ShiraishiTetsuki NishimuraHideki Okuyama
    • Tatsuo MoritaMikio ShiraishiTetsuki NishimuraHideki Okuyama
    • G03B21/26G03B21/18
    • H04N9/3141G03B21/16H04N5/7441
    • A projector having an image display element for modulating light on the basis of an image signal and a projection lens for projecting light emitted from the image display element on a screen, includes: a lamp which has a light emitting source for emitting light; a reflector which reflects light emitted from the light emitting source; a cover glass which covers an emission surface of light from the reflector; a cooling fan disposed outside the reflector; and an air direction changing unit which changes a direction of cooling air caused by the cooling fan. The air direction changing unit is disposed within a space surrounded by the reflector and the cover glass, and outside an emitted light path of light reflected by the reflector. Cooling air within the space is exhausted outside the projector through the cooling fan.
    • 一种具有用于根据图像信号调制光的图像显示元件的投影仪和用于将从图像显示元件发射的光投射到屏幕上的投影透镜,包括:具有用于发光的发光源的灯; 反射从所述发光源发射的光的反射器; 盖玻璃,其覆盖来自反射器的光的发射表面; 设置在反射器外部的冷却风扇; 以及空气方向改变单元,其改变由所述冷却风扇引起的冷却空气的方向。 空气方向改变单元设置在由反射器和盖玻璃包围的空间内以及由反射器反射的光的发射光路的外部。 空间内的冷却空气通过冷却风扇在投影机外部耗尽。