Projector Detection Light Emission Control for Power Reduction

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Solution Overview

Problem

Existing projector technologies waste energy by continuously emitting detection light regardless of the projector's state or installation method, leading to unnecessary power consumption and reduced light source lifetime.

Innovation Solution

A projector with a detection section and an emission control section that switches the light emitting section between emission and non-emission modes based on the projector's state, installation, and operational conditions, ensuring detection light is only emitted when necessary.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the light emitting section continuously emits detection light to enable point position detection, then the detection function is always available, but power consumption increases and light source lifetime decreases

Engineering Contradiction:

Improvedetection function availabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The light emitting section emits detection light periodically rather than continuously. The emission is activated only when point position detection is required (such as when a pointing device is detected or during active operation modes) and deactivated during periods when detection is not needed, thereby reducing overall power consumption while maintaining detection availability when required

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The emission state of the light emitting section is dynamically adjusted based on the operational state of the projector. The system transitions between emission and non-emission modes according to real-time conditions such as whether the projector is in standby mode, active mode, or sleep mode, optimizing the balance between detection availability and power consumption

Inventive Principle:

Principle #15Dynamics

2Reliability

If the light emitting section continuously emits detection light, then point position detection is always possible, but the light source lifetime is reduced

Engineering Contradiction:

Improvedetection function availabilityVSAvoidlight source lifetime

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

By implementing periodic emission rather than continuous emission, the light source operates for shorter durations overall. The emission is activated only during periods when detection functionality is required and remains inactive during periods when detection is not needed, thereby accumulating operational hours and extending the overall lifetime of the light source

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system dynamically controls the emission state based on operational requirements. During standby or sleep modes, the light emitting section remains inactive, preserving the light source for when it is truly needed, thus extending its operational lifetime while maintaining detection availability during active periods

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If detection light is emitted in all projector states and installation methods, then detection functionality is universally available, but unnecessary light emission occurs

Engineering Contradiction:

Improvedetection functionality availabilityVSAvoidunnecessary light emission

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The emission control section dynamically adjusts the emission state based on the specific operational state and installation method of the projector. The system determines whether the current configuration supports effective detection and activates the light emitting section only when appropriate, avoiding unnecessary emission in states or configurations where detection would not be effective

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system incorporates feedback mechanisms to determine the appropriate emission state based on detected conditions. By monitoring the operational state and installation configuration, the system makes intelligent decisions about when to activate or deactivate the light emitting section, ensuring energy is not wasted in situations where detection functionality would not be effective

Inventive Principle:

Principle #23Feedback

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 solution prevents unnecessary light emission, reduces power consumption, and extends the life of the light source by adapting light usage to the projector's operational and installation states.

Implementation Method 1

a method for detecting the point position by using reflection of the light may not be applied depending on the installation method of the projector

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS10228611B2Projector, projection system, and control method of projector

Publication Date: 2019.03.12 SEIKO EPSON CORP

AI summary

A projection system includes a projector and a light emitting device that emits detection light in a direction in response to a screen. The projector detects an operation to the screen based on detection light of the light emitting device by a position detection section and switches the light emitting device between an emission mode and a non-emission mode thereof in response to state of the projector.