Selective Transparent Screen Tinting for Glare Without View Loss

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Solution Overview

Problem

Conventional light management systems that adjust transparency to mitigate bright light sources often obstruct the user's view of the surrounding environment, and there is a need for a system that can provide relief from bright light sources without disturbing the view through transparent screens while being unobtrusive and effective.

Innovation Solution

A light management system with a sensor unit and control unit that determines the intensity and position of a light source relative to a person's eyes, tinting only specific portions of a transparent screen to prevent blinding while maintaining visibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional systems adjust transparency of windows to mitigate bright light sources, then the blinding effect is reduced, but the user's view of the surrounding environment is greatly limited

Engineering Contradiction:
Improveblinding effectVSAvoidview of surrounding environment
Core Design Contradiction:
Object-affected harmful factorsVSLoss of information

Solution Approach 1:

The patent divides the transparent screen into multiple independently controllable segments or zones. Each segment can be selectively tinted based on the position and intensity of light sources relative to the user's line of sight. This allows only the specific portions causing blinding to be darkened while leaving other portions clear, thus maintaining the view of the surrounding environment while mitigating the blinding effect.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system applies different transparency properties to different regions of the transparent screen. By detecting the position of light sources and the user's gaze direction, the control unit selectively tints only those specific areas where light sources intersect with the user's line of sight, while keeping other areas transparent. This localized approach preserves overall visibility while providing targeted relief from blinding light.

Inventive Principle:
Principle #3Local quality

2Object-affected harmful factors

If the transparent screen is tinted to prevent blinding, then protection from bright light is improved, but the transparency and view through the screen is reduced

Engineering Contradiction:
Improveprotection from bright lightVSAvoidtransparency
Core Design Contradiction:
Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The system dynamically adjusts the transparency of the transparent screen in real-time based on changing light conditions and user behavior. The sensor unit continuously monitors light source intensity and position, as well as the user's gaze direction, and the control unit相应地 adjusts the tinting of different segments. This dynamic adaptation ensures optimal balance between protection from blinding light and maintenance of transparency throughout the day as conditions change.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system incorporates feedback mechanisms where sensors detect light conditions and user gaze, and this information feeds back to the control unit which adjusts the tinting accordingly. The continuous monitoring and adjustment loop ensures that the transparent screen responds adaptively to changing conditions, maintaining the optimal balance between protection and visibility without requiring manual intervention.

Inventive Principle:
Principle #23Feedback

3Object-affected harmful factors

If a light management system is introduced to manage bright light sources, then relief from blinding is provided, but the system complexity increases

Engineering Contradiction:
Improverelief from blindingVSAvoidsystem complexity
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The transparent screen serves multiple functions: it acts as both a transparent viewing surface and a dynamically adjustable shading element. By integrating the tinting capability directly into the transparent screen structure, the system eliminates the need for separate shading devices, curtains, or blinds. This multi-functionality reduces overall system complexity while providing effective relief from blinding light.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system is designed to autonomously detect light conditions and user gaze, and automatically adjust the tinting without requiring manual control. The sensor unit and control unit work together to self-regulate the transparency levels based on real-time conditions, eliminating the need for complex user interfaces or manual operation while providing adaptive relief from blinding light.

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

The system effectively prevents blinding by bright light sources while allowing optimal viewing of the surrounding environment, dynamically adjusting transparency based on light conditions and user needs, enhancing safety and comfort.

Implementation Method 1

tint at least a portion of the transparent screen to prevent the person from being blinded by the light source

Methodology Applied
Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentEP4628334A1Light management system and method for operating a light management system
Publication Date: 2025.10.08 HARMAN BECKER AUTOMOTIVE SYST GMBH
  • EP4628334A1 patent drawingFigure 1~2
  • EP4628334A1 patent drawingFigure 3~5
  • EP4628334A1 patent drawingFigure 6~7

AI summary

A light management system (30) comprises a sensor unit (32) and a control unit (34), wherein the sensor unit (32) is configured to determine an intensity of a light source (50) on a first side of a transparent screen (120), the sensor unit (32) is further configured to, if the intensity of the light source (50) is greater than a defined threshold, determine a position of the light source (50) with respect to the eyes of a person located on a second side of the transparent screen (120), if, based on the position of the light source (50) with respect to the eyes of the person, it is determined by the control unit (34) that the light source (50) may be blinding the person, the control unit (34) is configured to tint at least a portion (122) of the transparent screen (120) to prevent the person from being blinded by the light source (50).