Handwritten keyboardless entry computer system

• US 5,297,216 A
• Filed: 10/11/1991
• Issued: 03/22/1994
• Est. Priority Date: 07/25/1986
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: AST Research, Inc. (Samsung Electronics Co. Ltd.)
• Inventors: Sklarew, Ralph
• Primary Examiner(s): Boudreau, Leo H.
• Application Number:
  US07/775,167
• Time in Patent Office: 893 Days
• Field of Search: 382/13, 382/59
• US Class Current: 382/189
• CPC Class Codes: F02B 2075/025 two
• CPC Class Codes: G06F 3/033 Pointing devices displaced or positioned by the user , e.g. mice, trackballs, pens or joysticks; Accessories therefor digitisers characterised by the transducing means G06F3/041
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text
• CPC Class Codes: G06V 30/1423 the instrument generating sequences of position coordinates corresponding to handwriting preprocessing or recognising digital ink G06V30/32
• CPC Class Codes: G06V 30/333 Preprocessing; Feature extraction
• CPC Class Codes: G06V 30/373 using a special pattern or subpattern alphabet
• CPC Class Codes: G09B 5/062 Combinations of audio and printed presentations, e.g. magnetically striped cards, talking books, magnetic tapes with printed texts thereon
• CPC Class Codes: G09B 5/065 Combinations of audio and video presentations, e.g. videotapes, videodiscs, television systems
• CPC Class Codes: Y10S 345/901 Electronic book with display

Abstract

A keyboardless entry computer system includes a transparent input screen that generates positional information when contacted by a stylus, and a display screen mounted physically below the input screen such that a character that is displayed can be seen below the input screen. The system includes a computer that has been programmed to compile the positional information into Strokes, to calculate Stroke characteristics, and then compare the Stroke characteristics with those stored in a database in order to recognize the symbol drawn by the stylus. Key features of the system are: (1) transparent position sensing subsystem; (2) underlying display on which to mimic drawing of sensed positions and to show characters or symbols; (3) means to convert sensed positions first into plotted Points and then into recognized characters or symbols; and (4) means to "learn" to associate sensed input positions with a character or symbol.

Claims

1. In a device for processing information which includes a display device for displaying predetermined text and a device for recognizing digitized symbols, for displaying recognized characters on said display device and for executing commands corresponding to recognized command symbols, including commands for editing said predetermined text, a method for inputting symbols to said device comprising:

providing a digitizer for digitizing a handwritten symbol and providing a digitized symbol to the device for recognizing, said digitizer and said display device positioned one over the other to permit viewing of said predetermined text on said display while looking at said digitizer; and

creating a window on said display device, upon execution of a predetermined command, in an area where no window appeared during a time prior to execution of said predetermined command, said window for entering at least two handwritten symbols in the same window, for editing said predetermined text displayed on said display device.

7. A method, as claimed in claim 1, further comprising the step of:

distinguishing between a first and a second of said at least two handwritten symbols entered in the same window.

8. A method, as claimed in claim 1, wherein said step of creating a window is performed in response to entry of a command symbol.

9. A method, as claimed in claim 8, wherein said command symbol is a handwritten command symbol.

10. A method, as claimed in claim 1, wherein said step of creating a window comprises creating a window in an area which was used to display predetermined text, prior to said execution of said predetermined command.

2. In a device for processing information which includes a display device and a device for recognizing digitized symbols, for displaying recognized characters on said display device and for executing commands corresponding to recognized command symbols, apparatus for inputting symbols to said device comprising:

a digitizer, coupled to the display device, for digitizing a handwritten symbol and providing said digitized symbol to the device for recognizing, said digitizer positioned over said display device to permit viewing of said display while looking at said digitizer; and

a first area on said display device usable as both

a window for entering at least two handwritten symbols in the same window during a first time period following execution of a predetermined command and

a display area for displaying predetermined text during another time period in the absence of a window being displayed in said first area during said another time period.

3. Apparatus, as claimed in claim 2, further comprising:

an area on said display configured as a soft key wherein when a user indicates selection of any point within said area, a predetermined command is executed.

11. Apparatus, as claimed in claim 2, further comprising means for distinguishing between a first and a second of said at least two handwritten symbols entered in the same window.

12. Apparatus, as claimed in claim 2, wherein said first area on said display is usable as said window area in response to entry of a command symbol.

13. Apparatus, as claimed in claim 12, wherein said command symbol is a handwritten command symbol.

4. In a device for recognizing and displaying handwritten symbols, an apparatus, comprising:

a display for displaying predetermined text during a first time period; and

means, coupled to said display, for creating a window on said display, during a second time period, different from said first time period, in an area used for displaying said predetermined text during said first time period, for entering at least two handwritten symbols in the same window.

5. Apparatus, as claimed in claim 4, wherein said means includes a plurality of executable program instructions.

6. Apparatus, as claimed in claim 5, wherein said plurality of instructions is stored in a read only memory.

14. Apparatus, as claimed in claim 4, further comprising means for distinguishing between a first and a second of said at least two handwritten symbols entered in the same window.

15. Apparatus, as claimed in claim 4, wherein said means for creating a window creates said window in response to entry of a command symbol.

16. Apparatus, as claimed in claim 15, wherein said command symbol is a handwritten command symbol.