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    • 2. 发明授权
    • Partial beamforming
    • 部分波束成形
    • US5388079A
    • 1995-02-07
    • US38572
    • 1993-03-26
    • Jin KimLin X. YaoZoran BanjaninHiroshi FukukitaHisashi HagiwaraMasami Kawabuchi
    • Jin KimLin X. YaoZoran BanjaninHiroshi FukukitaHisashi HagiwaraMasami Kawabuchi
    • G01V1/00A61B8/00G01N29/06G01N29/44G01S7/523G01S15/89G10K11/34G01S15/00
    • G10K11/345
    • In accordance with the principles of the present invention, advantage is taken by the inventors of the fact that the speed of operation of the digital hardware in a digital beamformer can be reduced by providing, for example, multiple phases of the data signals and then processing the multi-phase data in N parallel summing paths. An interpolation-decimation filter receives the multi-phase data from the N parallel summing paths and provides at its output a signal having a reduced data rate (1/N). In accordance with this technique, the speed of operation of the individual digital circuits for forming the required beamforming delays is not increased as compared to conventional post-beamforming interpolation schemes, so that hereby the effective data rate is increased by a factor N and results in a decrease of the delay quantization error by a factor N. In accordance with the principles of the invention, the interpolation-decimation filter is incorporated into the beamformer at a most advantageous place. That is, it is incorporated into the beamformer processing after partial beamforming of a group of receive channels and before formation of the final beam. This approach allows the final beamforming to be simple and performed at a relatively low data rate and allows the higher rate signal processing to be confined to circuitry which may advantageously be on a single type of integrated circuit which is repetitively used in the beamformer.
    • 根据本发明的原理,发明人的优点是可以通过提供例如数据信号的多个相位然后处理来减少数字波束形成器中的数字硬件的操作速度 N个并行求和路径中的多相数据。 插值抽取滤波器从N个并行求和路径接收多相数据,并在其输出端提供具有降低的数据速率(1 / N)的信号。 根据这种技术,与传统的后波束成形插值方案相比,用于形成所需波束成形延迟的各个数字电路的操作速度没有增加,因此有效数据速率增加了因子N,并导致 延迟量化误差减小因子N.根据本发明的原理,内插抽取滤波器在最有利的地方并入波束形成器中。 也就是说,它在一组接收通道的部分波束形成之后并且在形成最终波束之前被并入到波束形成器处理中。 这种方法允许最终的波束成形简单并且以相对较低的数据速率执行,并且允许较高速率的信号处理被限制在有利地可以在波束形成器中重复使用的单一类型的集成电路上的电路。
    • 3. 发明授权
    • Multi-beam digital beamforming method and apparatus
    • 多波束数字波束成形方法及装置
    • US5544128A
    • 1996-08-06
    • US270868
    • 1994-07-05
    • Jin KimLin X. YaoZoran Banjanin
    • Jin KimLin X. YaoZoran Banjanin
    • A61B8/00G01S7/52G01S7/523G01S15/89G10K11/34G01S15/00
    • G01S7/52095G10K11/34G01S7/52023
    • In accordance with the principles of the present invention, advantage is taken by the inventors of the fact that the speed of operation of the digital hardware in a digital beamformer can be reduced by providing, for example, multiple phases of the data signals and then processing the multi-phase data in N parallel summing paths. An interpolation-decimation filter receives the multi-phase data from the N parallel summing paths and provides at its output a signal having a reduced data rate (1/N). In accordance with this technique, the speed of operation of the individual digital circuits for forming the required beamforming delays is not increased as compared to conventional post-beamforming interpolation schemes, so that hereby the effective data rate is increased by a factor N and results in a decrease of the delay quantization error by a factor N. In accordance with the principles of the invention, the interpolation-decimation filter is incorporated into the beamformer at a most advantageous place. That is, it is incorporated into the beamformer processing after partial beamforming of a group of receive channels and before formation of the final beam. This approach allows the final beamforming to be simple and performed at a relatively low data rate and allows the higher rate signal processing to be confined to circuitry which may advantageously be on a single type of integrated circuit which is repetitively used in the beamformer. Further increase in the effective speed of operation is produced by providing timing circuitry that allows parallel processing of signals from a plurality of scanning beam lines.
    • 根据本发明的原理,发明人的优点是可以通过提供例如数据信号的多个相位然后处理来减少数字波束形成器中的数字硬件的操作速度 N个并行求和路径中的多相数据。 插值抽取滤波器从N个并行求和路径接收多相数据,并在其输出端提供具有降低的数据速率(1 / N)的信号。 根据这种技术,与传统的后波束成形插值方案相比,用于形成所需波束成形延迟的各个数字电路的操作速度没有增加,因此有效数据速率增加了因子N,并导致 延迟量化误差减小因子N.根据本发明的原理,内插抽取滤波器在最有利的地方并入波束形成器中。 也就是说,它在一组接收通道的部分波束形成之后并且在形成最终波束之前被并入到波束形成器处理中。 这种方法允许最终的波束成形简单并且以相对较低的数据速率执行,并且允许较高速率的信号处理被限制在有利地可以在波束形成器中重复使用的单一类型的集成电路上的电路。 通过提供允许来自多个扫描光束线的信号的并行处理的定时电路产生有效的操作速度的进一步增加。
    • 5. 发明授权
    • Method and apparatus for adaptive spatial image filtering
    • 自适应空间图像滤波的方法和装置
    • US5653234A
    • 1997-08-05
    • US536417
    • 1995-09-29
    • Jin KimSteven R. MarquisZoran BanjaninDong-Chyuan Liu
    • Jin KimSteven R. MarquisZoran BanjaninDong-Chyuan Liu
    • G01S7/52A61B8/00
    • G01S7/52077
    • An apparatus and method for removing noise from a signal S(x). The noise is removed by filtering S(x) through a low pass filter having an adjustable pass band. A control processor analyzes S(x) prior to S(x) being input to the low pass filter and adjusts the pass band in response to an estimate of the SNR or rate of change of S(x) such that the pass band is reduced when the estimated SNR decreases and the pass band is increased when the SNR increases. In embodiments in which the control processor utilizes the rate of change of S(x) to control the pass band, the pass band is reduced when the rate of change of S(x) increases and increased when the rate of change of S(x) decreases. In embodiments used in ultrasound applications, the estimate of the SNR can be obtained from x, the power in S(x), or the variance in the measured velocity. The estimate of the rate of change of S(x) may be computed from an estimate of the correlation distance in S(x).
    • 一种用于从信号S(x)中去除噪声的装置和方法。 通过具有可调节通带的低通滤波器对S(x)进行滤波来去除噪声。 控制处理器在将S(x)输入到低通滤波器之前分析S(x),并响应于SNR的估计或S(x)的变化率来调整通带,使得通带减少 当SNR增加时估计的SNR降低并且通带增加。 在控制处理器利用S(x)的变化率来控制通带的实施例中,当S(x)的变化率随S(x)的变化率增加而增加时,通带被减小 )减少。 在超声应用中使用的实施例中,可以从x(S(x)中的功率)或测量的速度的方差来获得SNR的估计。 可以从S(x)中的相关距离的估计来计算S(x)的变化率的估计。
    • 10. 发明申请
    • Light guide plate and liquid crystal display device having the same
    • 导光板及具有该导光板的液晶显示装置
    • US20080031006A1
    • 2008-02-07
    • US11730802
    • 2007-04-04
    • Hee KimJin KimJin Kim
    • Hee KimJin KimJin Kim
    • F21V8/00
    • G02B6/0036G02B6/0051G02B6/0053G02B6/0061
    • A light guide plate and a liquid crystal display device having the same. The light guide plate is disposed upstream of a liquid crystal panel to refract light supplied through an edge thereof, toward the liquid crystal panel. In the light guide plate, a plate body is disposed at a side of a light source for supplying light when a supply voltage is applied. A plurality of pyramidal diffusing elements are arrayed in a predetermined pattern on a surface of the plate body. Each of the diffusing elements is rotated clockwise or counterclockwise about an axis extending through a vertex of the diffusing element perpendicularly to the surface of the plate body so that an edge of the diffusing element facing a reference line connecting a central point of the light source to a central point of the plate body is angled 10° to 35° about the reference line.
    • 导光板和具有该导光板的液晶显示装置。 导光板配置在液晶面板的上游侧,将通过其边缘供给的光折射到液晶面板。 在导光板中,当施加电源电压时,板体设置在用于供应光的光源的一侧。 多个金字塔形扩散元件以预定图案排列在板体的表面上。 每个扩散元件围绕延伸穿过漫射元件的顶点的轴线顺时针或逆时针旋转,垂直于板体的表面,使得漫射元件的边缘面向连接光源的中心点的参考线, 板体的中心点围绕参考线倾斜10°至35°。