公开(公告)号：US5159363A

公开(公告)日：1992-10-27

申请号：US640393

申请日：1991-01-28

申请人： Gerhard Brauning

发明人： Gerhard Brauning

IPC分类号： G03B21/132

CPC分类号： G03B21/132 ,  Y10S353/03 ,  Y10S353/05

摘要： The invention relates to an overhead projector for projecting images, said projector including a liquid crystal display panel arranged in the imaging plane, an optical imaging unit and a lamp and reflector arrangement accommodated in a housing as well as a scanning means for stored data. Adjacent to the platen (18) covering the liquid crystal display panel (17), a data strip scanning means (20) is provided which is accessible from outside. A transparency (23) which shows pictures, diagrams or the like and can be placed on platen (18) comprises a data strip (25) for selective and/or joint projection with the liquid crystal images, said data strip extending into the area of the scanning means (20) when the transparency (23) is placed on platen (18). The data stored on data strip (25) can be supplied in the form of control signals to the liquid crystal display panel (17) via a computer associated with the scanning means (20) so that specific images can be generated on the liquid crystal display panel which supplement the contents of the transparency. In the case of a lecture, the information on the transparency and the images on the liquid crystal display panel can be jointly projected in an enlarged representation on a projection screen so that they can be viewed by a major audience.

摘要翻译： PCT No.PCT / EP89 / 01455 Sec。 371日期1991年1月28日 102（e）日期1991年1月28日PCT 1991年12月1日PCT PCT。 出版物WO90 / 06537 日期：1990年6月14日本发明涉及一种用于投影图像的高架投影仪，所述投影仪包括布置在成像平面中的液晶显示面板，光学成像单元以及容纳在壳体中的灯和反射器布置 用于存储数据的扫描装置。 覆盖液晶显示面板（17）的台板（18）附近设置有可从外部接近的数据带扫描装置（20）。 显示图片，图表等并且可以放置在压板（18）上的透明体（23）包括用于与液晶图像选择性和/或联合投影的数据条（25），所述数据条延伸到 当透明体（23）被放置在台板（18）上时，扫描装置（20）。 存储在数据条（25）上的数据可以通过与扫描装置（20）相关联的计算机以控制信号的形式提供给液晶显示面板（17），使得可以在液晶显示器上产生特定的图像 补充透明度内容的面板。 在演讲的情况下，液晶显示面板上的透明度和图像的信息可以在投影屏幕上以放大的形式共同投影，使得能够被主要观众观看。

公开(公告)号：US5101197A

公开(公告)日：1992-03-31

申请号：US233285

申请日：1988-08-17

申请人： Steven R. Hix ,  Paul E. Gulick ,  Robert E. Haas

发明人： Steven R. Hix ,  Paul E. Gulick ,  Robert E. Haas

IPC分类号： G06F3/153 ,  G02F1/13357 ,  G06F3/147 ,  G09G3/36 ,  G09G5/00 ,  G09G5/12 ,  G09G5/14 ,  H04N5/74

CPC分类号： G06F3/147 ,  H04N5/7441 ,  G02F2001/133627 ,  Y10S353/03

摘要： An electronic transparency device is provided with a memory in which a plurality of frames of video data ("slides") can be stored. The apparatus includes a control microprocessor which can cause predefined sequences of slides to be presented on the LCD panel automatically. These slide "shows" are defined by the user using a hand held remote control unit in conjuntion with menus displayed on the LCD panel in window fashion by the microprocessor. The user can specify the duration that each slide in a sequence is to be shown, the video transition by which it is to be introduced, the degree of "windowshading" with which it is to be displayed, etc. Once a show is defined, it can be instituted and controlled from the remote control unit. Among other numerous features, the transparency also includes a pointer that can be superimposed on the display and controlled by the remote control unit. This pointer can be used to define certain portions of the screen that are to be displayed in highlighted fashion.

公开(公告)号：US4973254A

公开(公告)日：1990-11-27

申请号：US397032

申请日：1989-08-21

申请人： Judy Bracconier

发明人： Judy Bracconier

IPC分类号： G09B5/02

CPC分类号： G09B5/02 ,  Y10S353/03 ,  Y10S353/04

摘要： Educational apparatus for use with an overhead projector has a transparent grid with horizontal and vertical indices for projecting a grid onto a wall screen. A plurality of removable cover pieces, keyed to the grid, cover up grid segments whereby when the transparent grid has pictorial material a student, or player, may project a particular grid segment by picking up the cover piece on that segment.

摘要翻译： 与高架投影仪一起使用的教学设备具有透明网格，其具有用于将网格投射到墙壁屏幕上的水平和垂直索引。 键入网格的多个可拆卸的盖件覆盖网格段，由此当透明网格具有图形材料时，学生或玩家可以通过拾取该片段上的封面来投影特定的网格片段。

公开(公告)号：US4921343A

公开(公告)日：1990-05-01

申请号：US245983

申请日：1988-09-14

申请人： Seimei Ushiro ,  Bunsuke Emura

发明人： Seimei Ushiro ,  Bunsuke Emura

IPC分类号： G03B21/132

CPC分类号： G03B21/132 ,  Y10S353/03

摘要： A variable power reflectory type overhead projector for forming a projected luminous beam by lighting a reflecting mirror from the projecting lens side. A transparent film-to-be-projected support is provided between a regular position of the film to be projected and the projecting lens, and an auxiliary lens is included for focusing the projecting lens on the support.

摘要翻译： 一种用于通过从投影透镜侧照亮反射镜来形成投射的发光束的可变电源反射型顶置投影仪。 在要投影的胶片的规则位置和投影透镜之间提供透明的投影片，并且包括用于将投影透镜聚焦在支撑件上的辅助透镜。

公开(公告)号：US4838686A

公开(公告)日：1989-06-13

申请号：US127632

申请日：1987-12-02

申请人： Stig Berglund

发明人： Stig Berglund

IPC分类号： G03B21/132

CPC分类号： G03B21/132 ,  Y10S353/03

摘要： Projector apparatus including a light source, a projection head and a projection stage aperture for an object, the image of which is to be produced. The aperture is situated in the ray path between the light source and the projection head. An ellipsoidal mirror is situated in the light path between the light source and the aperture. One focal point of the ellipsoidal mirror substantially coincides with the light source and the other focal point of the mirror substantially coincides with the projection head. The projection head includes a deflection means. The projection head is situated substantially in a plane constituting a normal plane to the aperture plane and containing the front edge line of the aperture, as observed in the generally horizontal projection direction.

公开(公告)号：US4836786A

公开(公告)日：1989-06-06

申请号：US92672

申请日：1987-09-03

申请人： Robert P. Wong

发明人： Robert P. Wong

IPC分类号： G09B5/02 ,  G09B19/02

CPC分类号： G09B5/02 ,  G09B19/025 ,  Y10S353/03

摘要： A hand-held calculator for use in conducting classroom demonstrations of the operation thereof, including use of the operation instruction key means. The calculator comprises a frame, a keyboard section, data processing means and a display section and where both the keyboard and display sections are transparent to permit images thereof to be projected on a screen for teaching purposes.

摘要翻译： 一种用于进行其操作的课堂演示的手持计算器，包括使用操作指令键装置。 计算器包括框架，键盘部分，数据处理装置和显示部分，并且其中键盘和显示部分都是透明的，以允许其图像被投影在用于教导目的的屏幕上。

公开(公告)号：US4652101A

公开(公告)日：1987-03-24

申请号：US723252

申请日：1985-04-15

申请人： Peter H. Grunwald

发明人： Peter H. Grunwald

IPC分类号： G02F1/13 ,  G02F1/1335 ,  G02F1/13357 ,  G03B21/132 ,  G03B21/00

CPC分类号： G02F1/1313 ,  G03B21/132 ,  Y10S353/03 ,  Y10S353/04 ,  Y10S353/05

摘要： In an overhead projector comprising a writing plate, and under this arranged Fresnel lens, a light source and an objective carried by a carrying arm, the problem to be solved is to overcome the disadvantages of the state of the art and to provide a possibility for a lecturer to make information retrieved from an electronic information source, for example, a computer or an electronic game, accessible to a large viewer and listener circle. The invention solves this problem thereby, that between the Fresnel lens and the writing plate there are arranged a layer of liquid crystals which are aligned in an electric field and transparent electrodes on both sides thereof, whereby two of the plates or films traversed by the light beam have light polarizing properties.

摘要翻译： 在包括书写板的高架投影仪中，并且在该布置的菲涅耳透镜下方，由光源和由携带臂承载的物镜，要解决的问题是克服现有技术的缺点，并提供可能性 用于使从电子信息源（例如，计算机或电子游戏）检索的信息的讲师能够被大观众和听众圈访问。 本发明解决了这个问题，在菲涅耳透镜和书写板之间布置了一层液晶，它们在电场中排列，两面是透明电极，由此两个板或薄膜穿过光 光束具有光偏振性质。

公开(公告)号：US4449800A

公开(公告)日：1984-05-22

申请号：US461164

申请日：1983-01-26

申请人： Vincent E. De Longis ,  Henry Kyhl

发明人： Vincent E. De Longis ,  Henry Kyhl

IPC分类号： G03B21/132 ,  G03B21/30

CPC分类号： G03B21/132 ,  Y10S353/03

摘要： A portable overhead projector comprises a rectangular box-like housing having an open top and four side walls, a projecting lamp disposed in the housing and a planar fresnel lens. The fresnel lens is mounted in the housing for pivotal movement from a storage position wherein the fresnel lens is adjacent the open top of the housing to an operative position wherein the fresnel lens is spaced above the open top of the housing and the projecting lamp. A projecting head assembly is mounted to the housing when the fresnel lens is in the operative position to dispose the projecting head assembly thereabove and a cover is connectable to the housing for covering the fresnel lens when in the storage position.

摘要翻译： 便携式高架投影仪包括具有开口顶部和四个侧壁的矩形盒状壳体，设置在壳体中的突出灯和平面菲涅尔透镜。 菲涅尔透镜安装在壳体中，用于从存储位置枢转运动，其中菲涅耳透镜邻近壳体的开口顶部到达操作位置，其中菲涅耳透镜在壳体的敞开的顶部和投影灯之间间隔开。 当菲涅尔透镜处于操作位置以将突出的头部组件设置在上方时，突出的头部组件被安装到壳体，并且当处于存储位置时，盖可连接到壳体以覆盖菲涅尔透镜。

公开(公告)号：US3366005A

公开(公告)日：1968-01-30

申请号：US45999365

申请日：1965-06-01

申请人： VISUAL IMPACT MATERIALS INC

发明人： BENEDICT JOEL A

IPC分类号： G03B21/132

CPC分类号： G03B21/132 ,  Y10S353/03 ,  Y10S353/04

公开(公告)号：US3244069A

公开(公告)日：1966-04-05

申请号：US36670664

申请日：1964-05-12

申请人： CHARLES BESELER COMPANY

发明人： FIELD PHILIP M

IPC分类号： G03B21/132 ,  G03B21/20

CPC分类号： G03B21/132 ,  G03B21/2046 ,  Y10S353/03