Thin Position Sensor Structure With Flexible Protective Film
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Solution Overview
Problem
Existing position detection devices, such as pen tablets, are bulky and inconvenient to carry due to their sturdy construction, making them unsuitable for portability and accessibility, especially for students who need a portable drawing input device.
Innovation Solution
A position detection device configured with a sensor housed in a bag-shaped protective member, featuring a simple structure with electrodes stacked in intersecting directions, connected to a position detection circuitry, and protected by a spacer and board cover members, allowing for a thin and easy-to-carry design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a position detection device uses a sturdy housing and front panel to protect internal components, then reliability is improved, but the device thickness increases making it inconvenient to carry
Solution Approach 1:
The patent extracts the protective function from the traditional rigid housing structure and relocates it to a flexible protective film that covers only the sensor surface. This separates the protection function from the structural housing, allowing the device to be thin while still protecting the sensor from external forces
Solution Approach 2:
The patent employs a flexible protective film instead of a rigid housing to protect the sensor. This thin film provides necessary protection while maintaining device flexibility and reducing overall thickness, enabling portability without sacrificing component protection
2Adaptability or versatility
If a position detection device includes liquid crystal display and position detection sensor, then functionality is improved, but the device becomes expensive and complex
Solution Approach 1:
The patent extracts the display function from the integrated tablet device, creating a dedicated position detection sensor that can be connected to various display devices. This separation allows the sensor to be simpler and more affordable while maintaining full functionality when paired with external displays
Solution Approach 2:
The position detection sensor is designed to be universally compatible with various electronic devices including smartphones, tablets, and computers. This multi-functionality approach allows a single simple sensor to work with multiple different display devices, reducing overall system complexity and cost
3Ease of operation
If a position detection device is designed to be thin and portable, then ease of carrying is improved, but protection of internal components from external forces is reduced
Solution Approach 1:
The patent uses a flexible protective film that can conform to the thin device structure while still providing protection. This thin film barrier maintains portability while offering sufficient protection against minor external forces for the sensor 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 device is extremely thin, easy to assemble, and can be produced at low cost, providing a portable drawing input solution that is durable and resistant to external forces, suitable for use with electronic pens on various devices.
Implementation Method 1
a sensor in which a plurality of first electrodes arranged in a first direction and a plurality of second electrodes arranged in a second direction intersecting the first direction, are stacked
Data Source
AI summary
A position detection device including a sensor, a position detection circuitry, a spacer member, a board cover member, and a housing. In the sensor, a plurality of first electrodes arranged in a first direction and a plurality of second electrodes arranged in a second direction intersecting the first direction are stacked. The position detection circuitry, in operation, detects an indicated position on the sensor based on output signals from the first electrodes and the second electrodes of the sensor. The spacer member has a predetermined thickness. The board cover member adheres to a surface of the spacer member. The board cover member closes and seals an opening of a protective member. The housing houses at least the sensor and has a first surface serving as an operation surface.