Dewar Watch Thermal Insulation and Dynamic Contrast Control
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Solution Overview
Problem
Electronic watches face operational issues in extreme temperatures due to components that cannot withstand such conditions, leading to inaccurate and inefficient display reading.
Innovation Solution
A Dewar device with a thermal protection casing and a system for dynamically adjusting the contrast of the watch display, featuring a variable luminosity crystal and a control unit that uses event sensors to manage light intensity, ensuring optimal legibility regardless of environmental luminosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the watch is used in extreme temperature environments, then the watch can be deployed in diverse conditions, but the electronic components cannot withstand the extreme temperatures and cease to operate correctly
Solution Approach 1:
The patent divides the watch system into two separate temperature zones: a first case receiving extreme temperatures from the environment, and a second case maintained at a comfortable reading temperature. The thermal insulation assembly separates these cases, allowing the electronic components in the second case to operate reliably while the first case can withstand extreme external conditions.
Solution Approach 2:
The patent introduces a thermal insulation assembly as an intermediary between the first case (exposed to extreme temperatures) and the second case (housing electronic components). This intermediary structure with its insulation layers blocks thermal transfer, protecting the sensitive electronics from extreme temperature while allowing the watch to be deployed in diverse environmental conditions.
2Productivity
If the display device is made visible in extreme temperature conditions, then information can be displayed, but the contrast becomes difficult to read due to temperature effects on display performance
Solution Approach 1:
The patent implements a dynamic contrast adjustment system that automatically adapts the display contrast based on real-time temperature sensing. The control unit receives temperature data from a sensor and dynamically modifies the display device's contrast settings to maintain optimal legibility across varying temperature conditions, ensuring information remains readable without manual intervention.
Solution Approach 2:
The patent employs a feedback mechanism where a temperature sensor continuously monitors the internal temperature of the second case and provides this information to the control unit. The control unit uses this feedback to automatically adjust the display contrast, creating a closed-loop system that maintains optimal display performance despite temperature fluctuations.
3Reliability
If a thermal insulation assembly is added to protect components, then component reliability improves, but the device complexity increases
Solution Approach 1:
The patent designs the thermal insulation assembly to serve multiple functions simultaneously: it provides thermal isolation between cases, structural support for mounting the first and second cases, and integration points for housing the temperature sensor and control electronics. By making this assembly multi-functional, the patent reduces overall device complexity despite adding thermal protection capabilities.
Solution Approach 2:
The patent merges the thermal insulation function with the structural framework of the watch by integrating insulation layers into the case mounting structure. The insulation assembly is combined with the mechanical support elements, allowing thermal protection and structural integrity to be achieved through a unified design rather than separate add-on components.
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 Dewar device provides effective thermal insulation and dynamic contrast adjustment, allowing the watch to function accurately and comfortably read information across a wide temperature range, maintaining optimal internal temperature and reducing heat conduction.
Implementation Method 1
a thermal insulation assembly arranged between the first case and the second case, the thermal insulation assembly comprising a plurality of insulation layers
Implementation Method 2
the element for varying the luminosity of the crystal is a lighting element, in particular a transparent lighting element of the OLED type
Data Source
AI summary
A Dewar device (1) for mechanical and/or functional components 5 of a watch (10), comprising a casing (2) provided with an enclosure (4) wherein a case (12) of said watch (10) can be removably arranged, said case being provided with a display device capable of displaying information relating to time indications or to functions implemented by the watch (10), said display device being arranged opposite a crystal (6) of said casing (2), the Dewar device (1) comprising a system (3) for dynamically adjusting the contrast of the display device of the watch (10) comprising said variable luminosity crystal (6) and a control unit (8) configured to control the contrast of said display device of the watch (10).