公开(公告)号：US5546144A

公开(公告)日：1996-08-13

申请号：US228736

申请日：1994-04-18

Applicant: Kai Y. Lam ,  Loi Han

Inventor： Kai Y. Lam ,  Loi Han

IPC: G03B21/64 ,  H04N1/10 ,  G03B21/00

CPC classification number: H04N1/1008 ,  G03B21/64 ,  H04N2201/0404 ,  H04N2201/0422

Abstract: A securing apparatus for an article, for example a film or slide, to be scanned in an image scanner has a top and a bottom cover. The top cover is provided with a top window permitting the scanning light emitting from the image scanner to pass therethrough. The bottom cover can be selectively collapsibly connected to the top cover. An insertion mechanism is changeably mounted between the top and bottom covers and is provided with a viewing window corresponding to the top window for securing the article between the windows. The windows permit the scanning light emitting from the image scanner to pass therethrough. The changeable insertion mechanism can be configured to accommodate any film or slide having different sizes or orientations.

Abstract translation: 用于在图像扫描器中扫描的物品（例如胶片或幻灯片）的固定装置具有顶盖和底盖。 顶盖设置有允许从图像扫描器发射的扫描光通过的顶部窗口。 底盖可以选择性地可折叠地连接到顶盖。 插入机构可改变地安装在顶盖和底盖之间，并且设置有对应于顶窗的观察窗，用于将物品固定在窗户之间。 窗口允许从图像扫描器发射的扫描光通过。 可更换的插入机构可以被配置为容纳具有不同尺寸或取向的任何薄膜或滑块。

公开(公告)号：US4958826A

公开(公告)日：1990-09-25

申请号：US230157

申请日：1988-08-08

Applicant: Philip L. Chen

Inventor： Philip L. Chen

IPC: B65H5/06 ,  H04N1/00

CPC classification number: H04N1/0057

Abstract: A plurality of pinch rollers are employed to drive sheets of paper containing material to be scanned past an optical scanner to generate an optical image of the material which is converted into electrical signals. Each pinch roller includes a drive roller which is driven by a synchronized drive mechanism and an idler roller. The support shafts for the idler rollers are supported in elongated bearings which provide limited freedom of motion for the idler rollers in a direction substantially normal to their axes of rotation. A pressure plate has spring fingers which resiliently urge the idler rollers towards the drive rollers to resiliently pinch the paper sheets being driven. In the event that the paper should become jammed and needs to be removed or repositioned, a roller release lever can be actuated to drive the pressure plate so as to permit the idler rollers to move freely in their elongated support bearings. Further, a friction pad is provided which rides on the surface of the paper so that in the event that more that one sheet of paper should pass through the rollers only the lowermost sheet will pass through.

公开(公告)号：US4933777A

公开(公告)日：1990-06-12

申请号：US343542

申请日：1989-04-26

Applicant: Robert C. Hsieh ,  Eric Chen

Inventor： Robert C. Hsieh ,  Eric Chen

IPC: H04N1/405 ,  H04N1/41

CPC classification number: H04N1/4105 ,  H04N1/4058

Abstract: The present invention relates to a method enabling real-time conversion of the analog video signals from a charge coupled element into digital half-tone data which can be printed on a printer or displayed on a display screen and to a converting device which is developed for use with such method.The method according to the present invention serves six primary functions as follows:1. realization of half-tone patterns and regeneration of gray scales;2. half-tone models of high compression ratio;3. method for controlling and adjusting the contrast and brightness;4. half-tone rules for proportional reduction and enlargement;5. direct current regeneration of analog video signals; and6. compensation for uneven illumination.In addition, the present invention provides three embodiments of converter which are adequate to serve the above-mentioned functions in which:The first embodiment uses a framework comprising an analog comparator;The second embodiment uses a framework comprising a flash type analog/digital converter and a digital comparator; andThe third embodiment uses a framework comprising a successive approaching register (SAR) type analog/digital converter, a normalized table look-up unit, and a digital comparator.

Abstract translation: 本发明涉及一种能够将来自电荷耦合元件的模拟视频信号实时转换成可打印在打印机上或显示在显示屏上的数字半色调数据的方法以及一种为 使用这种方法。 根据本发明的方法具有以下六个主要功能：1.实现半色调图案和灰度再生; 2.压缩比高的半色调模型; 3.控制和调整对比度和亮度的方法; 比例缩小和扩大的半色调规则; 模拟视频信号的直流再生; 和6.补偿照明不均匀。 此外，本发明提供了足以实现上述功能的转换器的三个实施例，其中：第一实施例使用包括模拟比较器的框架; 第二实施例使用包括闪存型模拟/数字转换器和数字比较器的框架; 并且第三实施例使用包括连续逼近寄存器（SAR）型模/数转换器，归一化表查找单元和数字比较器的框架。

公开(公告)号：US4809062A

公开(公告)日：1989-02-28

申请号：US125202

申请日：1987-11-25

Applicant: Philip L. Chen

Inventor： Philip L. Chen

IPC: H04N1/00 ,  H04N1/12 ,  H04N1/193 ,  H04N1/48 ,  H04N1/46 ,  H04N1/028 ,  H04N1/10

CPC classification number: H04N1/0057 ,  H04N1/00602 ,  H04N1/121 ,  H04N1/482 ,  H04N1/193

Abstract: Material such as a document or picture of which an image is to be reproduced or transmitted, as in a facsimile device, is driven by pinch rollers past a light source in a controlled synchronized manner by means of a stepping motor. As the pinch rollers are driven, successive scan line images of the document are channelled through an elongated slit in a light directing channel and through a lens and a rotatably driven color wheel onto a light sensitive device such a linear array formed by a charge-coupled device (CCD). The color wheel has light filters for the primary colors and is synchronized with the scanning. The images received by the CCD are converted thereby to electrical form and appropriately processed for transmission or local utilization. A mechanism is provided to enable the disengagement of the pinch rollers from the material being scanned to avoid damage to such material should it become jammed in the rollers.

Abstract translation: 如传真装置那样的要再现或传送图像的文件或图像的材料通过夹持辊通过步进电机以受控同步的方式经过光源驱动。 当夹送辊被驱动时，原稿的连续扫描线图像通过导光通道中的细长狭缝引导，并且通过透镜和可旋转驱动的色轮引导到光敏器件上，例如由电荷耦合形成的线性阵列 设备（CCD）。 色轮具有用于原色的光过滤器，并与扫描同步。 由CCD接收的图像被转换为​​电形式并被适当地处理用于传输或本地利用。 提供了一种机构，用于使夹送辊与被扫描的材料分离，以避免在其被卡在辊中时损坏这种材料。

公开(公告)号：US5472182A

公开(公告)日：1995-12-05

申请号：US141250

申请日：1993-10-22

Applicant: Loi Han

Inventor： Loi Han

IPC: B65H5/06 ,  H04N1/00 ,  B65H5/22

CPC classification number: H04N1/00602 ,  B65H5/062 ,  H04N1/0057

Abstract: A document feeder which can be coupled to a motorized, portable optical scanner to feed documents across the scanner window of the scanner, including a housing with a support surface and an opposite offset platform surface which together form a slit through which the document is fed and including openings in the support surface for a drive and a drive set of spring-loaded rollers which are coupled together by a belt, and which extend partially below the platform surface and are adapted to cooperate with drive roller(s) of the motorized, portable optical scanner to feed documents across the scanner.

Abstract translation: 一种文档馈送器，其可耦合到电动便携式光学扫描仪以跨扫描器的扫描器窗口馈送文件，包括具有支撑表面的壳体和相对的偏移平台表面，该平面表面一起形成文档通过其通过的狭缝， 包括用于驱动器的支撑表面中的开口和通过带连接在一起的并且在平台表面下部分延伸并且适于与机动的便携式的驱动辊配合的弹簧加载的辊的驱动组 光学扫描仪将扫描仪送入文件。

公开(公告)号：US6026168A

公开(公告)日：2000-02-15

申请号：US970872

申请日：1997-11-14

Applicant: Xu Li ,  Elliot M. Rubin ,  Xiaofeng Shou

Inventor： Xu Li ,  Elliot M. Rubin ,  Xiaofeng Shou

IPC: H03G5/16 ,  H04R5/00

CPC classification number: H04S7/30 ,  H03G5/165 ,  H04S2400/13

Abstract: A signal regulator regulates an auxiliary signal based upon a primary signal scaled by an external amplifier. The signal regulator receives the primary signal with an unscaled level. Processing circuitry monitors the unscaled level of the primary signal. The primary signal is then output to the external amplifier for scaling, either by amplification or attenuation. The primary signal with a scaled level is in turn received by the signal regulator from the amplifier. The processing circuitry monitors the scaled level of the primary signal from the amplifier, and then generates a gain factor based upon the unscaled level and the scaled level of the primary signal. An auxiliary signal is received by the signal regulator. Adjusting circuitry receives the gain factor from the processing circuitry and adjusts a level of the auxiliary signal based upon the gain factor. The auxiliary signal with the adjusted level is then provided to an external component, for example, a loudspeaker. The signal regulator is particularly useful in regulating the volume of auxiliary audio channels in a surround-sound system based upon the volume of the main or front channels amplified by an audio/video receiver. The signal regulator performs system delay measurements, phase synchronization of the unscaled and scaled primary signals, volume tracking, and consecutive cross-correlation measurements to safe guard against erroneous volume adjustment.

Abstract translation: 信号调节器根据由外部放大器缩放的主信号来调节辅助信号。 信号调节器接收到具有非等级电平的主信号。 处理电路监控主信号的未标定电平。 然后，通过放大或衰减将主信号输出到外部放大器进行缩放。 具有缩放电平的主信号又由放大器的信号调节器接收。 处理电路监视来自放大器的主信号的缩放电平，然后基于未平均电平和主信号的缩放电平产生增益因子。 辅助信号由信号调节器接收。 调整电路从处理电路接收增益因子，并根据增益因子调整辅助信号的电平。 然后将具有调整电平的辅助信号提供给外部组件，例如扬声器。 信号调节器基于由音频/视频接收器放大的主声道或前声道的音量来调节环绕声系统中的辅助音频通道的音量特别有用。 信号调节器执行系统延迟测量，未缩放和缩​​放的初级信号的相位同步，体积跟踪和连续互相关测量，以安全防范错误的音量调节。

公开(公告)号：USD311909S

公开(公告)日：1990-11-06

申请号：US216996

申请日：1988-07-11

Applicant: Philip L. Chen

Designer： Philip L. Chen