Cursor Calibration via Elevation Angle Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional laser pointers using light emitting diodes face challenges in generating a visible cursor on displays with low surface reflectivity, such as liquid-crystal displays, and experience unpredictable cursor motion when the angle between the pointer and display changes, reducing operational efficiency.

Innovation Solution

A cursor calibration method and system that utilize a pointer with a gravity sensor and gyroscope to detect elevation angles and displacements, transmitting signals to a processing device to control the display of a cursor on a predetermined position, independent of display reflectivity, by setting a threshold angle and adjusting the pointer's orientation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a laser pointer is used to project a cursor on a display, then operational convenience is improved, but the cursor visibility is reduced when the display has low surface reflectivity

Engineering Contradiction:

Improveoperational convenienceVSAvoidcursor visibility

Core Design Contradiction:

Ease of operationVSIllumination intensity

Solution Approach 1:

The patent replaces the optical laser projection system with an electronic cursor control system. Instead of using a laser pointer that projects light onto the display surface, the system uses a sensor to detect the pointer's position and controls a software cursor on the display through electrical signals. This substitution eliminates the dependency on display surface reflectivity and ensures consistent cursor visibility across different display types.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fundamental operating parameters from optical projection to electronic control. The system detects the pointer's position using sensors and translates physical movements into digital coordinates that control the cursor's position on the display. This parameter transformation from optical intensity and surface reflectivity to electronic signal processing ensures the cursor remains visible regardless of display surface characteristics.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the relative position or angle between the laser pointer and display is changed, then presentation flexibility is improved, but unexpected cursor motion occurs reducing operational efficiency

Engineering Contradiction:

Improvepresentation flexibilityVSAvoidoperational efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent implements a feedback mechanism where sensors continuously detect the pointer's position and angle relative to the display. This information is processed to calculate the corresponding cursor position, and the system adjusts the cursor location based on the detected parameters. This closed-loop feedback ensures that changes in pointer position or angle produce predictable and intended cursor motion, maintaining operational efficiency while preserving presentation flexibility.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent creates a dynamic system that continuously adapts the cursor position based on real-time detection of the pointer's orientation and position. The system dynamically calculates the relationship between the pointer's physical state and the cursor's display position, allowing flexible presentation angles while maintaining predictable cursor behavior through continuous adjustment.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If the initial position of the light point is uncertain, then adaptability to different presentation scenarios is improved, but the time required to locate and use the cursor increases

Engineering Contradiction:

Improveadaptability to presentation scenariosVSAvoidtime to locate cursor

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent performs preliminary calibration to establish the relationship between the pointer's position and the cursor's initial position on the display. By pre-calibrating this relationship, the system ensures that when the pointer is first used, the cursor appears at the correct predetermined position without requiring the user to search or adjust. This preliminary action eliminates the time loss associated with locating the cursor while maintaining adaptability to different presentation scenarios.

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Ensures a stable and visible cursor on any display type, enhancing operational efficiency and user experience by allowing intuitive calibration of the cursor's initial position, regardless of display surface characteristics or relative angles.

Implementation Method 1

The pointer includes a gravity sensor configured to detect an elevation angle and a displacement of the pointer

Methodology Applied

Scientific EffectGravity sensor detection: Gravitation

Data Source

PatentUS10684702B2Cursor calibration method by detecting an elevation angle and cursor calibration system

Publication Date: 2020.06.16 QISDA CORP

AI summary

A cursor calibration method includes setting a threshold angle, and when an angle of elevation between a pointing direction of a pointer and a horizontal plane is reduced from greater than the threshold angle to smaller than or equal to the threshold angle, displaying the cursor of the pointer on a predetermined position of a display.