Timepiece Sensor Window Layout for Waterproof Fogging Inspection
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Solution Overview
Problem
Existing wristwatches with integrated pulse rate detection devices face challenges in conducting waterproof tests due to the presence of sheet-shaped display devices on the watch glass, which obstruct the inspection of fogging states.
Innovation Solution
The detection device incorporates a light receiving window and light emitting windows with waterproof packings, allowing for high-pressure waterproofing, and a larger second light emitting window for inspecting fogging, separate from the watch glass, enabling effective waterproof testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a sheet-shaped display device is provided on the inner surface of the watch glass, then the timepiece can display information, but the waterproof test cannot be conducted because the display obstructs inspection of the fogging state
Solution Approach 1:
The patent divides the optical detection function into two separate components: the watch glass with display device and the light receiving window on the back cover. This segmentation allows the watch glass to serve its display function without obstructing waterproof testing, while the separate light receiving window enables fogging state inspection independently.
Solution Approach 2:
The patent introduces a light receiving window as an intermediary element on the back cover that allows optical detection of fogging without requiring direct access to the watch glass inner surface. This intermediary enables waterproof testing to proceed even when the watch glass has a display device attached.
2Measurement precision
If the light receiving window is made larger for better fogging inspection, then waterproof testing is improved, but more unnecessary light may enter and interfere with detection
Solution Approach 1:
The patent applies local quality by making the light receiving window larger only in the specific region needed for fogging inspection on the back cover, while maintaining appropriate light blocking properties in other areas. This allows optimized fogging detection without excessive light interference.
Solution Approach 2:
The light receiving window acts as an intermediary that can be independently optimized for its specific function of detecting fogging on the back cover, separate from the watch glass assembly. This allows the window size to be tailored for optimal inspection capability without compromising overall device performance.
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 structure ensures reliable waterproof testing and enhanced detection performance for pulse rate and oxygen saturation by blocking unnecessary light and using a larger window for inspection, ensuring accurate and efficient biological information detection.
Implementation Method 1
a light emitting element and a light receiving element
Implementation Method 2
reflected light resulting from the applied light is received by a light receiving element
Implementation Method 3
the light receiving window and the light emitting window are provided with waterproof packings, so that high-pressure waterproofing can be achieved
Data Source
AI summary
A detection device including a device main body and a display arranged on an upper side of the device main body. The device further includes a light receiving element; a light emitting element; a light receiving window which corresponds to the light receiving element; and a light emitting window which corresponds to the light emitting element. The light receiving window or the light emitting window is capable of using for a waterproof test.