Patent Overview

Examples of the invention as described herein allow for additional movement of a mouse adapted to operate on a support surface. The examples are described herein primarily in the context of having a rotatable mouse situated on the support surface where a rotation of the mouse relative to a pivot point translates into a particular event.

As an example, such a mouse has a bottom surface with a convex shape. This convex shape allows the mouse to be rotatable on the support surface. This mouse includes a surface tracking sensor that detects translational movement of the mouse along the support surface. Additionally included are one or more orientation sensors that detect the rotational movement of the mouse.

A rotation of the mouse is used for moving content displayed on a processing system, such as a computer. As one example, a rotational movement of the mouse may translate into a scroll event that, when processed by the processing system, scrolls the displayed content. In another example, a rotational movement of the mouse may translate into a yaw event that, when processed by the processing system, rotates the displayed content.

It's Time to Yaw, Pitch & Roll!

Apple's patent FIG. 1 depicts a perspective view of an example computer mouse 102 that is adapted to operate on a support surface 104. As depicted in FIG. 1, the bottom surface of the mouse has a convex shape, where a central portion is curved and protrudes outwardly relative to relatively peripheral portions of the bottom surface. This rounded bottom contacts the support surface at one or more pivot points, such as pivot point 106. A "pivot point," as used herein, is a point at which the mouse rotates.

The rounded bottom eases the mouse to be moved relative to the pivot point 106 in the form of a rotational movement. The mouse may rotate around one or more axes, such as X longitudinal axis 181, Y lateral axis 182, and/or Z vertical axis 183 relative to pivot point. The X longitudinal axis is an axis that passes through the mouse from its front end to its back end.

A rotation of the mouse around the X longitudinal axis is a "roll." The mouse may also rotate around the Y lateral axis, which is an axis that passes from its left side to its right side. A rotation of the mouse around the Y lateral axis is a "pitch." The Z vertical axis is an axis that is perpendicular to both the X longitudinal axis and the Y lateral axis. Rotation of the mouse around the Z vertical axis 183 is a "yaw."

The Heart of the New Mouse

Apple's patent FIG. 4 depicts a schematic diagram of a machine in the example form of a rotatable mouse that includes orientation sensors 402, surface tracking sensor 404, and controller 406, which may communicate with each other via bus 408.

The surface tracking sensor is configured to detect movement of the mouse along a support surface. An example of such a surface tracking sensor is an optical sensor 456. The optical sensor detects features of the support surface by, for example, taking images of the support surface. The optical sensor includes a light source, such as a light-emitting diode (LED) or a laser diode, which illuminates the support surface.

An orientation sensor, such as one of the orientation sensors depicted in FIG. 4, is configured to detect a rotational movement of the mouse relative to one or more pivot points. That is, the orientation sensor is configured to detect the roll, pitch, and/or yaw of the mouse. A variety of orientation sensors may be used to detect such rotational movements. An example of an orientation sensor is a gyroscope 450 or 452 used for measuring orientation or rotation based on detection of angular momentum. An example of a gyroscope is a vibrating structure gyroscope embodied in a micro electro-mechanical systems (MEMS) device. Another example of a gyroscope is a rotating gyroscope used to detect relative angular displacements and angular rates, which may be translated into a rotation of the mouse.

A Magnitude of Rotation: Processing may also include the translation of input signals from the orientation sensors into magnitudes of rotation. A "magnitude of rotation," as used herein, refers to an amount of rotational movement of the mouse that may be expressed as degrees, a one byte value having 256 levels of resolution or other values. As an example, the magnitude of rotation that defines a rotation of the mouse may also range from -128 to +127, where a negative value defines a clockwise rotation while a positive value defines a counterclockwise rotation. The range of values also depends on the resolution of the surface tracking sensor 456. It should also be appreciated that the translation of input signals into magnitudes of rotation may include a variety of well-known processing techniques, such as filtering and integrating the input signals from the orientation sensors.

The Controller: The controller 406 may also include an analog to digital converter (ADC) 458 for converting analog signals from analog devices, such as gyroscopes and accelerometer 454, into digital signals. It should be appreciated that the gyroscopes and the accelerometer may also be digital, and the electrical signals from such digital devices are not processed through the ADC 458. The controller may directly transmit the events in the form of a control signal to a computer by way of wireless communication (e.g., Bluetooth) or direct connection (e.g., Universal Serial Bus). It should be appreciated that the control signal transmitted by the mouse may include a variety of information items. In an example, the controller may transmit a control signal with the two-dimensional coordinates, information identifying the rotational movement (e.g., roll, pitch or yaw), and the magnitude of rotation, directly to the computer. Alternatively, the controller may further process the two-dimensional coordinates and magnitude of rotation into events, which is explained in more detail below, and transmit such events in the form of a control signal to the computer.

The controller can be configured to identify a quality of the support surface (or SQUAL) from the features. The controller may calculate a value that defines the quality. The quality of the support surface is dependent on a variety of factors, such as the type of support surface, color of the support surface and distance of the mouse from the support surface.

Apple's patent FIG. 5 noted above depicts another side view of the mouse for operation on a support surface 104. With reference to the coordinate system of FIG. 1, this side view is a view along the X-Z plane. As depicted in FIG. 5, the mouse includes a gyroscope 504, an accelerometer, an optical sensor, and a controller, which may communicate with each other via bus. In this example, the gyroscope is a triple-axes gyroscope that detects the roll, pitch, and yaw of the mouse. The accelerometer is used to detect the acceleration of gravity for use in calibration of the gyroscope.

Example Navigation Techniques

Apple's patent FIGS. 9A to 9C depict diagrams of example navigation techniques based on rotational movement of the mouse. The processing system may use the two-dimensional coordinate, the magnitude of rotation, or events to move displayed contents. As depicted in FIG. 9A, we see a clockwise roll of the mouse resulting in a control signal sent to the processing system that identifies a clockwise roll and a magnitude of the clockwise roll. In the diagram depicted in FIG. 9B, a pitch of the mouse towards a user results in a control signal sent to the processing system that identifies a clockwise pitch and a magnitude of the clockwise pitch. In the example of FIG. 9C, a clockwise yaw of the mouse 102 results in a control signal sent to the processing system that identifies a clockwise yaw and a magnitude of the clockwise yaw.

Apple credits Michael Cretella, JR and David Amm as the inventors of patent application 20100039381, originally filed in Q3 2008.

Two Additional and/or Related Patents

Two additional patent applications noted as 20100039394 and 20100042358 invented by Apple's Farshid Moussavi - may add to the overview of this new mouse or Magic Mouse upgrade. On the other hand, the technology may better relate to Apple's new 3D remote patent application published in late December 2009 being that it relates to "video game consoles, set-top boxes, televisions, personal computers, digital video recorders" and more.

Patent application 20100039394 relates to electronic input devices and more particularly to electronic input devices having both inertial sensors and touch sensors. The motion sensing element can be used to track large ranges of motion. The input device can also include a touch sensitive surface operable to detect touches on the touch sensitive surface. The touch sensitive surface can be used to track relatively smaller ranges of motion.

Patent application 20100042358 relates to technology for monitoring motion of electronic input devices, and more particularly to technology for motion plane correction of motion-based input devices. The invention is directed to methods and apparatuses for reducing or eliminating tracking errors associated with moving an accelerometer based tracking device, or other force based tracking devices, at a tilt with respect to a plane normal to the direction of the gravitational force.

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