Optical Navigating Apparatus Dynamic Sampling Rate Control

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Solution Overview

Problem

Conventional optical navigating apparatuses face low power efficiency due to a fixed sampling rate in their touch control panels, which does not adapt to different operations, leading to continuous and unnecessary power consumption.

Innovation Solution

An optical navigating apparatus that adjusts the sampling rate of its touch control panel based on displacement signals, decreasing the rate when displacement increases and increasing it when displacement decreases, allowing for dynamic power management without compromising sensitivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the touch control panel uses a fixed sampling rate to maintain sensitivity, then the touch control operation detection accuracy is improved, but the power consumption increases due to continuous sampling

Engineering Contradiction:

Improvetouch control operation detection accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent applies dynamics by making the sampling rate adjustable rather than fixed. The control unit dynamically changes the sampling rate based on the operational state of the optical navigating apparatus, transitioning between high sampling rates (for accurate touch detection) and low sampling rates (for power saving), thus resolving the contradiction between detection accuracy and power consumption

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of sampling rate from a fixed value to a variable parameter that adapts to different operational conditions. By modifying the sampling rate parameter based on displacement detection results, the system optimizes the balance between maintaining detection sensitivity and reducing power consumption

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If the sampling rate is increased to maintain sensitivity during stationary states, then the touch control detection accuracy is improved, but the power consumption increases due to unnecessary sampling during high displacement movements

Engineering Contradiction:

Improvetouch control detection accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

The patent implements feedback by using the displacement signal from the optical displacement detecting apparatus to control the sampling rate of the touch control panel. The control unit continuously monitors the operational state and adjusts the sampling rate accordingly, creating a closed-loop system that prevents unnecessary sampling during high displacement movements while maintaining sensitivity when needed

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS9201543B2Optical navigating apparatus and computer readable recording media for performing optical navigating method

Publication Date: 2015.12.01 PIXART IMAGING INC

AI summary

An optical navigating apparatus, comprising: a displacement detecting apparatus, for determining if the optical navigating apparatus has displacement relative to an target, and for generating a displacement signal according to the displacement; and a touch control panel, for detecting a touch control operation of an user, wherein the touch control panel has a sampling rate and changes the sampling rate according to a control signal, wherein the sampling rate can be adjusted according to the displacement signal, where the sampling rate correspondingly decreases when the displacement signal indicates the displacement increases.