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    • 6. 发明授权
    • Light emitting diode
    • 发光二极管
    • US4301461A
    • 1981-11-17
    • US104846
    • 1979-12-18
    • Toshiaki Asano
    • Toshiaki Asano
    • H01L33/10H01L33/20H01L33/30H01L33/58H01L33/00
    • H01L33/54H01L33/20
    • A light emitting diode (LED) having excellent directivity, which is provided with a light emitting surface formed by a PN-junction of a semiconductor body, and a dome of a transparent material formed on the light emitting surface. The external surface of the dome is made a light emitting window. This external surface is in a semi-spherical shape at least in its one part, and the light emitting surface is on the symmetrical axis of the semi-spherical surface. Further, the light emitting surface is disposed at a position displaced for a finite distance in the direction opposite to the light emitting direction with respect to the center of curvature of the semi-spherical surface. With such construction of the LED, light from the light emitting surface intensifies its directivity at the time of its emission from the external surface of the dome.
    • 具有优良方向性的发光二极管(LED),其具有由半导体主体的PN结形成的发光表面和形成在发光表面上的透明材料的圆顶。 圆顶的外表面被制成发光窗。 该外表面至少在其一部分中呈半球形,并且发光表面在半球形表面的对称轴上。 此外,发光面设置在相对于半球面的曲率中心在与发光方向相反的方向上移位有限距离的位置。 通过LED的这种结构,来自发光表面的光在其从圆顶的外表面发射时强化其方向性。
    • 8. 发明授权
    • Voice feature extraction device
    • 语音特征提取装置
    • US06959277B2
    • 2005-10-25
    • US09891876
    • 2001-06-26
    • Shingo KiuchiToshiaki AsanoNozomu Saito
    • Shingo KiuchiToshiaki AsanoNozomu Saito
    • G10L15/00G10L15/02G10L15/20G10L15/28G10L21/02
    • G10L15/20G10L15/02G10L21/0208
    • In a conventional device for extracting voice features accurately without being influenced by noises, such as a voice recognition device, usually an input voice signal is processed first by a noise reduction system having the tap length N, and the result is FFT-processed by L-points, and then the power spectrum vector is calculated; accordingly, a one time operation requires N multiplications and (N−1) summations. The voice feature extraction device according to the invention receives a voice signal including noises from a microphone, which is processed by a window function operation unit, and thereafter FFT-processed by an FFT operation unit by L-points. A power calculation unit calculates a power spectrum vector of the input voice signal. However, a noise reduction system determines in advance a filter coefficient of this system and processes the coefficient to calculate a noise reduction coefficient, and the power spectrum vector is processed by this noise reduction system. Thereby, the voice feature extraction device of the invention reduces the processing volume to 1/(4N−2) in comparison to the conventional device, lightens the processing load of the processing unit, and increases the processing speed.
    • 在诸如语音识别装置的语音识别装置的声音特征准确地提取语音特征的常规装置中,通常由具有抽头长度N的噪声降低系统首先处理输入语音信号,并且将结果由L 点,然后计算功率谱矢量; 因此,一次操作需要N次乘法和(N-1)个求和。 根据本发明的语音特征提取装置接收由麦克风产生的噪声的声音信号,由麦克风进行处理,由窗函数运算单元进行处理,然后由FFT运算单元用L点进行FFT处理。 功率计算单元计算输入语音信号的功率谱矢量。 然而,噪声降低系统预先确定该系统的滤波器系数并处理该系数以计算降噪系数,并且由该降噪系统处理功率谱矢量。 因此,本发明的语音特征提取装置与常规装置相比将处理量减少到1 /(4N-2),减轻了处理单元的处理负荷,并且提高了处理速度。
    • 10. 发明授权
    • Plasma display panel with an up-conversion phosphor
    • 带上转换荧光粉的等离子显示面板
    • US06265825B1
    • 2001-07-24
    • US09252892
    • 1999-02-19
    • Toshiaki Asano
    • Toshiaki Asano
    • H01J1749
    • H01J11/12H01J11/42
    • The brightness of plasma display panel and extend the life thereof are improved. Of glass substrates 3 and 5 facing each other via partitioning walls 6 and defining a predetermined electric discharge space, a conventional phosphor layer 7 is provided on the glass substrate 5, and an up-conversion phosphor layer 8 is provided on the other glass substrate 3. Application of a high voltage between discharge electrodes 1 and 2 causes electric discharge, generating vacuum ultraviolet radiation and infrared radiation. The up-conversion phosphor layer 8 converts the infrared radiation to visible light, while the conventional phosphor layer 7 converts the vacuum ultraviolet radiation to visible light.
    • 提高等离子体显示面板的亮度并延长其寿命。 在通过分隔壁6彼此面对并限定预定放电空间的玻璃基板3和5之间,在玻璃基板5上设置常规的荧光体层7,并且在另一个玻璃基板3上设置上转换荧光体层8 在放电电极1和2之间施加高电压导致放电,产生真空紫外线辐射和红外辐射。 上变换荧光体层8将红外线辐射转换为可见光,而传统荧光体层7将真空紫外线辐射转换为可见光。