Electronic transparency method and apparatus

• US 5,101,197 A
• Filed: 08/17/1988
• Issued: 03/31/1992
• Est. Priority Date: 08/17/1988
• Status: Expired due to Term

• Current Assignee: Straight Signals LLC (Intellectual Ventures LLC)
• Original Assignee: InFocus Corporation (Lap-Shun Hui, MBA)
• Inventors: Gulick, Paul E., Hix, Steven R., Haas, Robert E.
• Primary Examiner(s): Weldon, Ulysses
• Assistant Examiner(s): FATAHI YAR, MAHMOUD
• Application Number:
  US07/233,285
• Time in Patent Office: 1,322 Days
• Field of Search: 340/799, 340/705, 340/784, 350/331 R, 350/334, 350/345, 353/119, 353/120, 353/122, 353/DIG. 3, 353/DIG. 5, 358/60, 358/102, 358/231
• US Class Current: 345/87
• CPC Class Codes: G02F 1/133627 Projection-direct viewing
• CPC Class Codes: G06F 3/147 using display panels
• CPC Class Codes: H04N 5/7441 the modulator being an array of liquid crystal cells
• CPC Class Codes: Y10S 353/03 Transparent

Abstract

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.

Claims

1. An electronic transparency apparatus comprising:

first processor means for generating and supplying video data;

a LCD display unit having;

1) a liquid crystal display;

2) input means for receiving said video data from said first processor means;

3) frame buffer means, coupled to said input means, for storing said video data as a frame of video data; and

4) output buffer means, coupled to said frame buffer means and said liquid crystal display, for receiving said frame to video data from said frame buffer means and for presenting said frame of video data to said liquid crystal display;

a memory module having;

1) second processor means coupled to said frame buffer means for selectively enabling a first and second data path for said video data; and

2) a storage device, coupled to said second processor means and said frame buffer means whereby said apparatus displays said video data from said first processor means when said first data path is enabled and said storage device adapted to selectively capture and store said video data as a plurality of frames of video data when said second path is enabled; and

3) means for editing and subsequently displaying selected ones of said stored frames of video data on said apparatus.

2. The electronic transparency apparatus of claim 1 which further comprises means for causing a sequence of said stored frames of video data displayed on said display to repeat after a last image in the sequence has been displayed.

3. The electronic transparency apparatus of claim 1 which further comprises:

means for superimposing a pointing indicia on selected ones of said displayed frames of video data; and

means for moving said pointing indicia to a desired location on said liquid crystal display.

4. The electronic transparency apparatus of claim 1 which further comprises:

means for defining an area on selected ones of said frames of video data to be highlighted; and

means for highlighting said defined area on said liquid crystal display.

5. The electronic transparency apparatus of claim 4 wherein said means for highlighting comprises microprocessing means for defining said area by activating a pointer/highlighting function and for displaying the defined area in reverse video form on said liquid crystal display.

6. The electronic transparency apparatus of claim 1 which further comprises:

means for selecting which of said plurality of stored frames of video data are to be displayed; and

sequence determining means for determining the sequence in which said selected frames of video data are to be displayed.

7. The electronic transparency apparatus of claim 6 which further comprises duration specifying means for specifying the length of time each of said selected frames of video data is to be displayed.

8. The electronic transparency apparatus of claim 7 in which the selecting means, the sequence determining means and the duration specifying means comprise a microprocessor means for controlling said memory module and said display unit;

said microprocessor means having a remote control unit as an input device thereto.

9. The electronic transparency apparatus of claim 1 which further comprises:

means for highlighting portions of said captured frames of video data stored in said memory module;

means for superimposing textual material onto selected ones of said captured frames of video data stored in said memory module; and

means for superimposing graphical elements onto selected ones of said captured frames of video data stored in said memory module.

10. The electronic transparency apparatus of claim 1 further comprising a battery coupled to said storage device.

11. The electronic transparency apparatus of claim 1 further comprising a memory device for storing an instruction set used by said second processor means.

12. The electronic transparency apparatus of claim 1 wherein said LCD display unit further comprises:

an input port coupled to said first processor means;

an input shift register coupled to said input port which assembles said video data into a video word and outputs said video word to said frame buffer;

a frame buffer controller coupled to said frame buffer means, said memory module and said input port which controls assembly of a plurality of said video words into said frame of video data;

a LCD controller for generating control signals for presenting said frame of video data in said output buffer to said liquid crystal display; and

a clock coupled to said input port, said input shift register, said frame buffer controller and said LCD controller for issuing timing signal signals whereby said frame of video data in said output buffer is displayed on said liquid crystal display.