Computer mouse clock tuning to reduce electromagnetic induced noise in a wireless charging system
First Claim
1. A computer mouse comprising:
- a housing;
one or more processors; and
an image sensor circuit coupled to the housing and operatively coupled to the one or more processors, the image sensor circuit configured to image a surface to detect movement of the computer mouse with respect to the surface,wherein the image sensor is susceptible to receiving electromagnetic (EM) radiation emitted from a source external to the computer mouse, wherein the received EM radiation induces noise within one or more bands of noise frequencies and the image sensor circuit generates erroneous movement detection signals in response to an operating frequency of the image sensor circuit being within the one or more bands of noise frequencies,wherein the image sensor circuit is configured to operate at an operating frequency outside of the one or more bands of noise frequencies while imaging the surface,wherein the operating frequency drifts as a result of a change of temperature of the computer mouse, andwherein the one or more processors are configured to tune the operating frequency of the image sensor circuit towards a target frequency in response to the operating frequency of the image sensor circuit deviating from the target frequency.
1 Assignment
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Accused Products
Abstract
A method of operating a computer mouse includes receiving electromagnetic (EM) radiation emitted from a source external to the computer mouse, the received EM radiation induces noise within one or more bands of noise frequencies and an image sensor circuit of the computer mouse generates erroneous movement detection signals in response to an operating frequency of the image sensor circuit being within the one or more bands of noise frequencies. The method further includes determining the operating frequency of the image sensor circuit, comparing the operating frequency to a target frequency, wherein the target frequency is outside of the one or more bands of noise frequencies, and tuning the operating frequency of the image sensor circuit towards the target frequency.
22 Citations
14 Claims
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1. A computer mouse comprising:
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a housing; one or more processors; and an image sensor circuit coupled to the housing and operatively coupled to the one or more processors, the image sensor circuit configured to image a surface to detect movement of the computer mouse with respect to the surface, wherein the image sensor is susceptible to receiving electromagnetic (EM) radiation emitted from a source external to the computer mouse, wherein the received EM radiation induces noise within one or more bands of noise frequencies and the image sensor circuit generates erroneous movement detection signals in response to an operating frequency of the image sensor circuit being within the one or more bands of noise frequencies, wherein the image sensor circuit is configured to operate at an operating frequency outside of the one or more bands of noise frequencies while imaging the surface, wherein the operating frequency drifts as a result of a change of temperature of the computer mouse, and wherein the one or more processors are configured to tune the operating frequency of the image sensor circuit towards a target frequency in response to the operating frequency of the image sensor circuit deviating from the target frequency. - View Dependent Claims (2, 3, 4, 5)
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6. A method of operating a computer mouse, the method comprising:
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receiving electromagnetic (EM) radiation emitted from a source external to the computer mouse, wherein the received EM radiation induces noise within one or more bands of noise frequencies and an image sensor circuit of the computer mouse generates erroneous movement detection signals in response to an operating frequency of the image sensor circuit being within the one or more bands of noise frequencies; determining a current operating frequency of the image sensor circuit; comparing the current operating frequency to a target frequency, wherein the target frequency is outside of the one or more bands of noise frequencies; and tuning the current operating frequency of the image sensor circuit towards the target frequency. - View Dependent Claims (7, 8, 9)
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10. A method of operating an input device, the method comprising:
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suspending, for a suspension time period, a transmission of position data; determining an operating frequency of an image sensor circuit; comparing the operating frequency of the image sensor circuit to a target frequency, wherein the target frequency is selected based on an interference-induced noise within one or more frequency bands, the interference-induced noise is caused by a wireless charging system operatively coupled to the input device, the interference-induced noise causes the image sensor circuit to generate erroneous movement tracking data in response the operating frequency of the image sensor circuit falling within the one or more frequency bands, and the target frequency is not included in the one or more frequency bands; determining that the operating frequency deviates from the target frequency; in response to determining that the operating frequency deviates from the target frequency, tuning the operating frequency of the image sensor circuit to converge towards the target frequency; and resuming the transmission of position data. - View Dependent Claims (11, 12, 13, 14)
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Specification