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    • 15. 发明授权
    • Underpulsed scanner with variable scan speed, P. W. M. color balance,
scan modes and column reversal
    • 具有可变扫描速度的弱脉冲扫描仪,P. W. M.色彩平衡,扫描模式和色谱柱反转
    • US5991055A
    • 1999-11-23
    • US717921
    • 1996-09-23
    • Robert D. HaselbyCurtis J. BehrendJack H. SchmidtMorad Samii
    • Robert D. HaselbyCurtis J. BehrendJack H. SchmidtMorad Samii
    • B41J2/525H04N1/12H04N1/191H04N1/207H04N1/40H04N1/48H04N1/46G06K9/36
    • H04N1/1911H04N1/40056H04N1/484H04N1/12H04N2201/0414
    • Scan exposure in a row or swath scanner is controlled by pulsing light sources with pulses that are separated by dark intervals from each other--and from the detector readout periods. Detector sequencing is thereby made independent of the velocity of the pixel-line advance mechanism. Different pulse widths for different colors provide color correction without calculation, or regularize color-space conversion calculations where needed. In a swath scanner, known technology of printing modes is imported into the scanning context. Order of pixel columns within each swath is reversed for printing--permitting use of novel configurations such as a dual-parallel-flatbed copier in which a single common scan-and-advance mechanism simultaneously transports the scan sensor and printheads. To produce mirror images, this configuration is also used without column reversal. In addition to red, green and blue light sources, an infrared source is used for reading invisible indicia that identify forms or media types. The scan sensor is also used for auxiliary printing functions.
    • 脉冲扫描仪中的扫描曝光是通过脉冲光源进行控制的,脉冲间隔相隔较长的脉冲和检测器读出周期。 因此,检测器排序与像素行前进机制的速度无关。 不同颜色的不同脉冲宽度可以在不进行计算的情况下提供颜色校正,也可以在必要时对颜色空间转换进行规 在扫描仪中,将已知的打印模式技术导入到扫描上下文中。 每个条带中的像素列的顺序相反,用于打印,允许使用新颖的配置,例如双平行平板复印机,其中单个共同的扫描和提前机构同时传送扫描传感器和打印头。 为了产生镜像,也可以在没有柱反转的情况下使用此配置。 除了红色,绿色和蓝色光源之外,红外光源用于读取识别形式或介质类型的不可见标记。 扫描传感器也用于辅助打印功能。
    • 16. 发明授权
    • Transmissive polygonal optical scanning of illumination for light valve
video projector
    • 透光多功能光学扫描光阀视频投影仪
    • US5428467A
    • 1995-06-27
    • US64970
    • 1993-05-20
    • Jack H. Schmidt
    • Jack H. Schmidt
    • G02B26/08G02B26/10G02F1/1335H04N5/74H04N9/31H04N5/645
    • H04N9/3111G02B26/0875G02B26/10H04N9/3129
    • A projection system employs a reflective light valve (10) that is optically addressed by an image from a cathode ray tube (12) and provides an output image for projection by means of a high intensity reading light from a lamp (16) directed to the output face of the liquid crystal light valve. Improved reading illumination is provided by scanning the face of the liquid crystal light valve (10) with a narrow beam of light (80) that moves across the liquid crystal light valve face in synchronism with a scanning image from the writing CRT (12). The scanned narrow band of illumination is provided by refractive transmission through a rotating transparent polygonal body (50,74) having pairs of mutually parallel sides (54,56,58,60,75,76,77a,b), wherein different pairs of sides may be made to transmit light of different colors for color projection. Rotation of the polygonal body is synchronized (82) with the vertical sync (86) of the CRT scan to cause the light beam refracted by the body to synchronously scan the face of the liquid crystal light valve.
    • 投影系统采用通过来自阴极射线管(12)的图像进行光学寻址的反射光阀(10),并通过来自指向所述阴极射线管(12)的灯(16)的高强度读取光提供用于投影的输出图像 液晶光阀的输出面。 通过与来自写入CRT(12)的扫描图像同步地移动跨越液晶光阀面的窄光束(80)扫描液晶光阀(10)的表面来提供改进的读取照明。 经扫描的照明窄带通过具有相互平行的对(54,56,58,60,75,76,77a,b)对的旋转透明多边体(50,74)的折射透射来提供,其中不同的 可以使侧面透射不同颜色的光以进行颜色投影。 多边形体的旋转与CRT扫描的垂直同步(86)同步(82),使得由身体折射的光束同步扫描液晶光阀的表面。