Phosphorescent Watch Illumination via Ambient Light Collection

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Solution Overview

Problem

Existing horological and scientific apparatuses face challenges in illuminating display indicators in low-light conditions without relying on radioactive materials or frequent battery changes, and existing solutions are either costly or occupy internal space.

Innovation Solution

A device with a phosphorescent light source inside the case that collects external light energy and uses a light relay or light guide to illuminate display indicators, featuring a control mechanism for on-demand lighting through a movable cover that can be made of opaque or reflective materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If radioactive paints are used to illuminate display indicators, then night reading is made easier, but user health is compromised and the appearance becomes conspicuous

Engineering Contradiction:

Improvenight reading visibilityVSAvoiduser health impact

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful radioactive illumination into a beneficial phosphorescent system that uses harmless ambient light (including UV through the sapphire crystal) to charge phosphorescent materials, which then emit light without radioactive contamination. The sapphire crystal acts as both a protective window and a UV-transmissive charger for the phosphorescent elements.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent introduces phosphorescent materials as an intermediary between ambient light and the display indicator. These materials absorb light energy during the day and release it gradually at night, mediating the illumination process without requiring direct connection to power sources or radioactive materials.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Illumination intensity

If electrical lighting devices are incorporated, then night reading is improved, but frequent battery changes are required

Engineering Contradiction:

Improvedisplay visibilityVSAvoidbattery life

Core Design Contradiction:

Illumination intensityVSDuration of action of moving object

Solution Approach 1:

The patent implements a self-charging system where the watch's normal operation (wearing on the wrist, exposure to ambient light) automatically charges the phosphorescent materials. The system serves itself by converting ambient light energy into stored luminous energy without requiring user intervention for battery replacement or charging.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces the electrical battery-powered lighting system with a photomechanical phosphorescent system. Instead of using electrical energy storage and conversion, the system uses light absorption and phosphorescent emission, eliminating the need for batteries, circuits, and electrical components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Illumination intensity

If capacitor or battery charger mechanisms are used, then electrical lighting can be provided, but cost increases and internal space is occupied

Engineering Contradiction:

Improvedisplay illuminationVSAvoidinternal space

Core Design Contradiction:

Illumination intensityVSVolume of moving object

Solution Approach 1:

The patent extracts and eliminates the complex electrical energy storage mechanisms (capacitors, battery chargers, oscillating weights) from the watch. By using phosphorescent materials that can be charged through the existing sapphire crystal and ambient light, the system removes unnecessary components, reducing both cost and internal space requirements.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent makes the sapphire crystal serve multiple functions: it acts as the protective window of the watch, the UV-transmissive charger for phosphorescent materials, and the aesthetic element. This multi-functionality eliminates the need for separate charging mechanisms, reducing internal space and component count.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Enables prolonged illumination of display indicators without electrical power, reducing the need for battery changes and occupying less internal space, while maintaining aesthetic appeal and enhancing reading contrast.

Implementation Method 1

at least one phosphorescent light source inside said case, means of collecting external light energy from the ambient medium of said case towards said phosphorescent light source

Methodology Applied

Scientific EffectPhosphorescence: Phosphorescence

Data Source

PatentUS9465364B2Illumination of a date mechanism

Publication Date: 2016.10.11 THE SWATCH GRP RES & DEVELONMENT LTD

AI summary

A device for illuminating at least one display indicator incorporated in a case underneath an aperture of a horological or scientific apparatus, the device including a phosphorescent light source inside the case, a mechanism collecting external light energy from an ambient medium of the case towards the phosphorescent light source, and at least one light component formed, either by the source, or by a light relay connected to the source by a transmission mechanism, and the light component is configured, to illuminate the indicator, either on the opposite side to the aperture relative to the indicator, or at a periphery of the aperture, and a controller is configured to move a cover insertable between the light component and the indicator.