PRESSURE SENSITIVE STYLUS

• US 20180088689A1
• Filed: 07/15/2015
• Published: 03/29/2018
• Est. Priority Date: 07/15/2015
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Frenock, James
• Granted Patent: US 11,112,888 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/03 Arrangements for converting the position or the displacement of a member into a coded form
• CPC Class Codes: G06F 3/0312 for tracking the rotation of a spherical or circular member, e.g. optical rotary encoders used in mice or trackballs using a tracking ball or in mouse scroll wheels tracking relative movement in co-operation with a regularly or irregularly patterned surface, e.g. as in optical mice G06F3/0317; constructional details of scroll or thumb-wheels G06F3/0362; optical rotary encoders G01D5/3473
• CPC Class Codes: G06F 3/0317 in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface
• 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 3/03541 Mouse/trackball convertible devices, in which the same ball is used to track the 2D relative movement
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/0487 using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

In one implementation, a pressure sensitive stylus may receive, at a controller, drawing area coordinates, a stroke pressure from a voltage generated by a piezoelectric crystal, and a stylus coordinate direction from a plurality of fiber optic sensors, determine a drawing area from a wireless signal frequency corresponding to the drawing area coordinates, determine a drawing mode of a stylus stroke, wherein the drawing mode includes a stylus coordinate direction and a stylus stroke type, and transmit the drawing area and the stylus stroke.

Claims

1. A method for a pressure sensitive stylus, comprising:

receiving at a controller;

drawing area coordinates;

a stroke pressure from a voltage generated by a piezoelectric crystal; and

a stylus coordinate direction from, a plurality of fiber optic sensors;

determining a drawing area from a wireless signal frequency corresponding to the drawing area coordinates;

determining a drawing mode of a stylus stroke, wherein the drawing mode includes the stylus coordinate direction and a stylus stroke type; and

transmitting the drawing area and the stylus stroke.

2. The method of claim 1, comprising determining the stylus stroke type based on the voltage generated by the piezoelectric crystal, the voltage determined by the stroke pressure.

3. The method of claim 1, wherein determining the stylus coordinate direction from the plurality of fiber optic sensors includes:

determining a first coordinate component of the stylus coordinate direction by a first fiber optic sensor of the plurality of fiber optic sensors; and

determining a second coordinate component of the stylus coordinate direction by a second fiber optic sensor of the plurality of fiber optic sensors.

4. The method of claim 3, wherein determining the first coordinate component and the second coordinate component of the stylus coordinate direction includes sensing the first coordinate component and the second coordinate component from a trackball.

5. The method of claim 1, comprising determining a stylus stroke width corresponding to the stroke pressure.

6. A pressure sensitive stylus, comprising:

a first piezoelectric crystal to generate a first voltage corresponding to a stroke pressure from a trackball;

a first fiber optic sensor to sense a first coordinate component of a stylus coordinate direction, wherein the first fiber optic sensor includes a first transmitter and a first receiver;

a second piezoelectric crystal to generate a second voltage corresponding to a stroke pressure from an eraser head; and

a second fiber optic sensor to sense a second coordinate component of the stylus coordinate direction, wherein the second fiber optic sensor includes a second transmitter and a second receiver.

7. The pressure sensitive stylus of claim 6, wherein the first voltage generated by the stroke pressure from the trackball corresponds to a write stroke.

8. The pressure sensitive stylus of claim 6, wherein the trackball is connected to the first piezoelectric crystal by a spring and a connecting rod.

9. The pressure sensitive stylus of claim 6, wherein the second voltage generated by the stroke pressure from the eraser head corresponds to an erase stroke.

10. The pressure sensitive stylus of claim 6, wherein the eraser head is connected to the second piezoelectric crystal by a spring and a connecting rod.

11. A system, comprising:

a pressure sensitive stylus including;

a plurality of piezoelectric crystals to determine a stroke pressure and a stylus stroke type;

a plurality of fiber optic sensors to determine a stylus coordinate direction;

a controller to determine;

a drawing area of the pressure sensitive stylus corresponding to drawing area coordinates; and

a stylus stroke from stroke pressure, the stylus stroke type, and the stylus coordinate direction;

a computing device to receive the drawing area and the stylus stroke from the pressure sensitive stylus; and

a user interface to display the stylus stroke.

12. The system of claim 11, wherein the drawing area coordinates correspond to a wireless signal frequency.

13. The system of claim 11, wherein the drawing area coordinates define the drawing area of the pressure sensitive stylus.

14. The system of claim 11, wherein the stylus coordinate direction determines a direction of the stylus stroke relative to the drawing area coordinates.

15. The system of claim 11, wherein the computing device receives the drawing area and the stylus stroke from the pressure sensitive stylus by a wireless connection.