Display Device Emission Section Obstacle Avoidance

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Solution Overview

Problem

Existing display devices face difficulties in detecting a pointing body when an obstacle blocks the detection light, leading to inaccurate positioning and failure in tracking the pointing body.

Innovation Solution

The display device employs an operation method that determines the presence of obstacles by imaging the display surface and adjusts the emission section's position or direction to maintain a longer distance or change the direction of the detection light to avoid obstacles, ensuring unobstructed detection light paths.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the emission section is positioned close to the display surface for accurate detection, then detection precision is improved, but obstacles block the detection light more easily

Engineering Contradiction:

Improvedetection precisionVSAvoidobstacle blocking

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The emission section is made movable along the normal direction of the display surface, allowing dynamic adjustment of its position. The moving section enables the emission section to change its distance from the display surface based on detected obstacle conditions, resolving the contradiction between maintaining close proximity for precision and avoiding obstacles.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the positional parameter of the emission section dynamically. By adjusting the distance between the emission section and display surface based on obstacle detection results, the system adapts to different conditions, maintaining detection precision while avoiding blockage.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If the detection light direction is fixed for simple structure, then device complexity is reduced, but obstacles block the light path

Engineering Contradiction:

Improvestructure complexityVSAvoidobstacle blocking

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The emission section's orientation is made adjustable through the moving section, which can rotate or reposition the emission section to change the light emission direction. This dynamic adjustment capability allows the system to navigate around obstacles while maintaining a relatively simple overall structure.

Inventive Principle:

Principle #15Dynamics

3Object-affected harmful factors

If the emission section moves away from the display surface to avoid obstacles, then obstacle blocking is reduced, but detection precision deteriorates

Engineering Contradiction:

Improveobstacle blockingVSAvoiddetection precision

Core Design Contradiction:

Object-affected harmful factorsVSMeasurement precision

Solution Approach 1:

The imaging section provides feedback about obstacle positions and the pointing body's location. Based on this feedback, the control section adjusts the emission section's position and orientation, and the moving section executes these adjustments, creating a closed-loop system that maintains detection precision while avoiding obstacles.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system uses its own imaging capability to detect obstacles and automatically adjusts its configuration to overcome blockage. The emission section serves itself by adapting its position based on environmental feedback, maintaining detection functionality without external intervention.

Inventive Principle:

Principle #25Self-service

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

This method effectively prevents detection obstruction by obstacles, maintaining accurate detection of pointing bodies and reducing false detection issues, thereby enhancing the reliability of the display device's operation.

Implementation Method 1

an emission section configured to emit detection light used to detect a pointing body configured to point a display surface along the display surface

Methodology Applied

Scientific EffectLight emission: Light

Implementation Method 2

based on first imaging data generated by imaging the display surface

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUS11334191B2Operation method and display device that avoid obstacles that block detection light

Publication Date: 2022.05.17 SEIKO EPSON CORP

AI summary

An operation method to be executed by a display device including an emission section configured to emit detection light used to detect a pointing body configured to point a display surface along the display surface includes the steps of determining whether an obstacle blocking at least a part of the detection light exists or not based on first imaging data generated by imaging the display surface, and moving, when determining that the obstacle exists, the emission section to thereby make a distance between the display surface and the emission section in a normal direction of the display surface longer than a distance between the display surface and the emission section in the normal direction at a moment of a determination that the obstacle exists.