Writing tip position sensing and processing apparatus

• US 5,294,792 A
• Filed: 12/31/1991
• Issued: 03/15/1994
• Est. Priority Date: 12/31/1991
• Status: Expired due to Term

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Hollister, Floyd H., Lewis, Russell F., Cone, Dale A.
• Primary Examiner(s): Messinger, Michael
• Application Number:
  US07/816,330
• Time in Patent Office: 805 Days
• Field of Search: 340/706, 340/707, 340/708, 340/710, 250/221, 250/227.13, 250/226, 382/13, 382/59, 382/3
• US Class Current: 250/221
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/03546 using a rotatable ball at the tip as position detecting member

Abstract

A self-contained pen computer is provided that is capable of acquiring data representative of written strokes of the stylus of the pen and then recognizing the symbols associated with these pen strokes, or compacting these strokes. These recognized symbols or compacted strokes are stored in a memory contained in the pen and are transmitted via a transmitter contained in the pen to a host computer.

Claims

1. A writing apparatus, comprising:

at least one detector for sensing a position of a writing tip of said writing apparatus and for generating data representative of said position;

at least one processor for processing said data and providing processed data as an output;

a memory for storing said processed data outputted by said processor;

a transmitter for transmitting said processed data stored in said memory said transmitter including a mode switch to control the transmission of said processed data; and

a power source for providing operating power to said at least one detector, said at least one processor, said memory, and said transmitter.

2. An apparatus for collecting and recognizing written data, comprising:

at least one detector for sensing a position of a writing tip of said apparatus and for generating data representative of said position;

a recognition chip for processing said data and converting said data into recognizable symbols;

a memory for storing said recognizable symbols;

a transmitter for transmitting said recognizable symbols stored in said memory said transmitter including a mode switch to control the transmission of said recognizable symbols; and

a power source for supplying operating power to said at least one detector, said recognition chip, said memory and said transmitter.

3. The apparatus as in claim 2, wherein said apparatus further comprises a general purpose processor for controlling modes of operation of said recognition chip, said memory, and said transmitter.

4. The apparatus as in claim 2, wherein said apparatus further comprises an exterior indication for indicating when said memory is substantially full.

5. The apparatus as in claim 2, wherein said apparatus further comprises an exterior indication for indicating when said power source is substantially depleted.

6. The apparatus as in claim 2, wherein said apparatus further comprises a solar panel positioned on the exterior of said apparatus for providing power to said power source.

7. The apparatus as in claim 2, wherein said apparatus further comprises a multi-pin plug positioned on the exterior of said apparatus and interconnected with said recognition chip.

8. The apparatus as in claim 2, wherein said power source comprises a DC battery.

9. The apparatus as in claim 2, wherein said recognition chip comprises a collection processor and at least one recognition processor.

10. The apparatus as in claim 2, wherein said memory comprises an emergency battery for powering said memory upon loss of power from said power source.

11. The apparatus as in claim 9, wherein said recognition chip further comprises a second memory for storing programs and libraries for use by said collection and said at least one recognition processors.

12. The apparatus as in claim 11, wherein said apparatus is a pen.

13. The apparatus as in claim 11, wherein said recognition chip further comprises CMOS circuits.

14. The apparatus as in claim 12, wherein said at least one detector comprises a plurality of CCDs disposed adjacent to said writing tip of said pen.

15. The apparatus as in claim 14, wherein said apparatus further comprises a plurality of lenses associated with said plurality of CCDs for providing said CCDs with a field of view adjacent to said writing tip of said pen.

16. The apparatus as in claim 15, wherein said apparatus further comprises an LED for illuminating said CCDs.

17. The apparatus as in claim 12, wherein said at least one detector comprises a track ball for contacting a writing surface and for attaching to said pen to rotate about an axis of said pen.

18. The apparatus as in claim 14, wherein said apparatus further comprises a plurality of lenses associated with said plurality of CCDs for providing said CCDs with an unrestricted field of view adjacent to said pen and for forming a portion of an exterior of said pen.

19. The apparatus as in claim 18, wherein said apparatus further comprises at leat two sources of illumination having different wavelengths and positioned adjacent to a preselected writing surface and to detect said data.

20. The apparatus as in claim 2, wherein said apparatus further comprises:

a second transmitter for transmitting said data from said at least one detector, and

a receiver for receiving transmissions from said second transmitter and providing said received data to said recognition chip.