High resolution scrolling apparatus

• US 20040150621A1
• Filed: 02/05/2003
• Published: 08/05/2004
• Est. Priority Date: 02/05/2003
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Bohn, David D.
• Granted Patent: US 7,091,951 B2
• Time in Patent Office: Days
• US Class Current: 345/163
• 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 3/03543 Mice or pucks G06F3/03541 takes precedence
• CPC Class Codes: G06F 3/0362 with detection of 1D translations or rotations of an operating part of the device, e.g. scroll wheels, sliders, knobs, rollers or belts

Abstract

A scrolling apparatus is disclosed that includes a rotatable scroll wheel and a sensor assembly coupled mechanically. The sensor assembly has an encoder wheel that rotates in response to rotation of the scroll wheel. The rotational axis of the encoder wheel is axially displaced from the rotational axis of scroll wheel, and concepts related to gearing may be utilized to increase the angular velocity of the encoder wheel in relation to the scroll wheel. In addition, the diameter of the encoder wheel may be greater than the diameter of a conventional encoder wheel. The gearing concepts and the differences in diameter of the scroll wheel and encoder wheel may be utilized alone or in combination to provide the scrolling apparatus with relatively high resolution.

Claims

1. An input device for scrolling an image relative to a display screen, the input device comprising:

a scroll wheel having a substantially circular configuration with an outer diameter; and

an encoder wheel coupled to the scroll wheel and configured to rotate in response to rotation of the scroll wheel, the encoder wheel having a diameter at a point at which rotation is optically sensed, the diameter of the encoder wheel being greater than the outer diameter of the scroll wheel.

2. The input device recited in claim 1, wherein a rotational axis of the scroll wheel and a rotational axis of the encoder wheel are offset.

3. The input device recited in claim 1, wherein the scroll wheel and the encoder wheel are oriented parallel to each other.

4. The input device recited in claim 1, wherein the scroll wheel and the encoder wheel are oriented perpendicular to each other.

5. The input device recited in claim 4, wherein a belt mechanically couples the scroll wheel and the encoder wheel, the belt being twisted around rotational axes of the scroll wheel and the encoder wheel that are angularly displaced from each other.

6. The input device recited in claim 1, further comprising a light source and a light sensor positioned on opposite sides-of the encoder wheel.

7. The input device recited in claim 6, wherein the encoder wheel includes a plurality of spaced openings, and light from the light source passes through the openings and toward the light sensor when the encoder wheel rotates.

8. The input device recited in claim 7, wherein the openings are defined in peripheral portions of the encoder wheel.

9. The input device recited in claim 1, wherein the encoder wheel and the scroll wheel are coupled such that the ratio of angular displacement between the encoder wheel and the scroll wheel is greater than 1:

1.

10. The input device recited in claim 1, further comprising a scroll wheel axle, an encoder wheel axle, each axle having a pulley mounted thereon, and a belt encircling the pulleys to mechanically couple the scroll wheel and the encoder wheel.

11. The input device recited in claim 10, wherein diameters of the pulleys are different such that a ratio of angular displacement between the encoder wheel and the scroll wheel is greater than 1:

1.

12. The input device recited in claim 1, wherein the input device is one of a computer mouse and a trackball.

13. The input device recited in claim 12, wherein the scroll wheel is depressible to activate a switch located within the housing.

14. The input device recited in claim 1, further comprising:

a housing having at least one aperture therein;

the scroll wheel protruding outward through the aperture such that a first portion of the scroll wheel is inside the housing and a second portion is exposed for user manipulation;

a light source; and

a light sensor, wherein the encoder wheel is positioned between the light source and the light sensor.

15. The input device recited in claim 14, wherein a rotational axis of the scroll wheel and a rotational axis of the encoder wheel are offset, and wherein the encoder wheel and the scroll wheel are coupled such that a ratio of angular displacement between the encoder wheel and the scroll wheel is greater than 1:

1.

16. An input device for scrolling an image relative to a display screen, the input device comprising:

a scroll wheel; and

an encoder wheel mechanically coupled to the scroll wheel such that a ratio of angular displacement between the encoder wheel and the scroll wheel is greater than 1;

1.

17. The input device recited in claim 16, wherein a first axle with a first pulley mounted thereon extends from the scroll wheel, a second axle with a second pulley mounted thereon extends from the encoder wheel, and a belt extends around the first pulley and the second pulley, a diameter of the first pulley being greater than a diameter of the second pulley.

18. The input device recited in claim 16, wherein a rotational axis of the scroll wheel and a rotational axis of the encoder wheel are offset.

19. The input device recited in claim 18, wherein the scroll wheel and the encoder wheel are parallel to each other.

20. The input device recited in claim 18, wherein the scroll wheel and the encoder wheel are perpendicular to each other.

21. The input device recited in claim 18, wherein a belt mechanically couples the scroll wheel and the sensor wheel, the belt being twisted to extend around the offset rotational axes of the scroll wheel and the encoder wheel.

22. The input device recited in claim 17, further comprising a light source and a light sensor positioned on opposite sides of the encoder wheel to detect rotation of the encoder wheel.

23. The input device recited in claim 22, wherein the encoder wheel includes a plurality of spaced openings, and light from the light source passes through the spaced openings and toward the light detector when the encoder wheel rotates.

24. The input device recited in claim 23, wherein the encoder wheel has a sensing diameter at a diameter of the spaced openings, and the scroll wheel includes an outer diameter, the sensing diameter of the encoder wheel being greater than the outer diameter of the scroll wheel.

25. The input device recited in claim 16, wherein the input device is one of a computer mouse, a trackball, and a keyboard.

26. The input device recited in claim 25, wherein the input device includes a housing having an aperture, wherein the scroll wheel is positioned to protrude through the aperture.

27. The input device recited in claim 26, wherein the scroll wheel is depressible to activate a switch located within the housing.

28. An input device for scrolling an image relative to a display screen, the input device comprising:

a scroll wheel that rotates about a first rotational axis; and

a sensor assembly mechanically coupled to the scroll wheel, the sensor assembly having a encoder wheel that rotates about a second rotational axis in response to rotation of the scroll wheel, the first rotational axis and the second rotational axis being offset.

29. The input device recited in claim 28, wherein the first rotational axis and the second rotational axis are parallel.

30. The input device recited in claim 28, wherein the first rotational axis and the second rotational axis are perpendicular.

31. The input device recited in claim 28, wherein a belt mechanically couples the scroll wheel and the encoder wheel, the belt being twisted to extend around the first rotational axis and the second rotational axis.

32. The input device recited in claim 31, wherein a diameter of the encoder wheel is greater than a diameter of the scroll wheel.

33. The input device recited in claim 28, further comprising an axle with a pulley mounted thereon extending from the scroll wheel and an axle with a pulley mounted thereon extending from the encoder wheel, and a belt extending around the pulleys to mechanically couple the scroll wheel and the encoder wheel.

34. The input device recited in claim 33, wherein the input device is a computer mouse.

35. The input device recited in claim 34, wherein diameters of the pulleys are different.