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    • 31. 发明授权
    • Method and apparatus for measurement of resolution of imaging systems
    • 用于测量成像系统分辨率的方法和装置
    • US5600432A
    • 1997-02-04
    • US263897
    • 1994-06-21
    • J. Michael LengyelRandy M. ManerLarry A. Nelson
    • J. Michael LengyelRandy M. ManerLarry A. Nelson
    • G02B27/42G01N21/00
    • G02B27/4266G02B27/42
    • A photographic facsimile of a line image at a predetermined orientation is illuminated by a collimated monochromatic light source to produce a diffraction pattern. The diffraction pattern is focussed by a converging lens to image the Fourier transform of the line image on a spatial frequency plane. The image in the spatial frequency plane is applied to a detector for measuring the spatial power distribution as a function of the spatial frequency. The line image is then reoriented in the image plane, and successive measurements made as the image is rotated in the image plane. Resolution is quantified in the spatial frequency plane as the magnitude of a selected signal as a function of displacement (i.e, spatial frequency). By simulating selected imaging components and generating a resultant line image, the resolution of any imaging system component may be measured.
    • 以预定取向的线图像的摄影传真由准直单色光源照射以产生衍射图案。 衍射图案由会聚透镜聚焦,以在空间频率平面上对行图像的傅立叶变换进行成像。 将空间频率平面中的图像应用于用于测量作为空间频率的函数的空间功率分布的检测器。 然后将线图像重新定向在图像平面中,并且随着图像在图像平面中旋转而进行的连续测量。 分辨率在空间频率平面中被量化为所选信号的幅度作为位移的函数(即空间频率)。 通过模拟所选择的成像组件并产生合成线图像,可以测量任何成像系统组件的分辨率。
    • 34. 发明授权
    • Apparatus and method for testing an active matrix pixel display
    • 用于测试有源矩阵像素显示的装置和方法
    • US5184082A
    • 1993-02-02
    • US761570
    • 1991-09-18
    • Larry A. Nelson
    • Larry A. Nelson
    • G01M11/00G02F1/133G02F1/136G02F1/1368G09G3/00G09G3/36
    • G09G3/006Y10S345/904
    • Apparatus and an associated method are described for testing liquid crystal matrix displays that can be performed prior to the assembly of the display. This display procedure involves applying of square wave signal to the control elements and a sine wave signal to the input terminal of an active element associated with the pixel under test. By selection of the sine wave signal frequency, the modulation products resulting from the combination of the square wave signals and the sine wave signal fall between the components resulting from the application of the square wave signal alone. As a result of the symmetry of the modulation components, a comb filter can be used to select the modulation components. The power of the transmitted modulation products provides a figure of merit for the active element associated with the pixel. A capacitor can be included along with the active element in the matrix display which couples the output signal of each active element to a row (control terminal) electrode on the same substrate as the active element. The capacitor provides an increase in the test result signal to noise level and permits testing of the active matrix substrate prior to display assembly.
    • 描述了用于测试在组装显示器之前可执行的液晶矩阵显示器的装置和相关方法。 该显示过程涉及将方波信号施加到控制元件,并将正弦波信号施加到与被测像素相关联的有源元件的输入端。 通过选择正弦波信号频率,由方波信号和正弦波信号的组合产生的调制产物落在单独应用方波信号产生的分量之间。 作为调制分量的对称性的结果,可以使用梳状滤波器来选择调制分量。 传输的调制产物的功率提供与像素相关联的有源元件的品质因数。 可以将电容器与有源元件一起包括在矩阵显示器中,其将每个有源元件的输出信号耦合到与有源元件相同的衬底上的行(控制端子)电极。 电容器将测试结果信号增加到噪声水平,并允许在显示组件之前测试有源矩阵基板。
    • 35. 发明授权
    • Memory mapped deflection correction system
    • 存储器映射偏转校正系统
    • US4871948A
    • 1989-10-03
    • US268872
    • 1988-11-08
    • Larry A. Nelson
    • Larry A. Nelson
    • H04N9/28
    • H04N9/28
    • A memory mapped deflection correction system for use in correcting misconvergence in color CRTs. The invention utilizes predetermined convergence values by storing these values in an onboard memory. Apparatus for spatial domain interpolation interpolates the stored values into intermediate convergence correction values. The intermediate values are reconstructed into analog convergence signals using a reconstruction means, including an analog to digital converter and an amplifier inherently including a time domain filter. The amplifier then drives the convergence yoke of the CRT.
    • 一种用于校正彩色CRT中失会聚误差的存储器映射偏转校正系统。 本发明通过将这些值存储在机载存储器中来利用预定的收敛值。 用于空间域插值的装置将存储的值内插到中间收敛校正值。 使用包括模数转换器和固有地包括时域滤波器的放大器的重建装置将中间值重建为模拟收敛信号。 然后,放大器驱动CRT的会聚轭。