Mobile Terminal Frame Position Detection via Voltage Sensing
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Solution Overview
Problem
The challenge is to prevent distortion of a frame in a mobile terminal with a flexible display by accurately detecting the degrees of extension and contraction, and adjusting the size of the video output accordingly.
Innovation Solution
A mobile terminal design that includes a first frame, a second frame movable in specific directions, a slide rail, a sensing terminal, a sensing resistor, an input resistor, a detecting unit, and a controller that calculates the position of the second frame based on detected voltage, ensuring stable movement and accurate video output adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible display is used to enable large deformation and size variation, then the adaptability and versatility of the mobile terminal are improved, but frame distortion and structural stability deteriorate
Solution Approach 1:
The mobile terminal is divided into multiple frames (first frame, second frame, third frame) that can move relative to each other. The flexible display is segmented into a fixed portion and a variable portion, allowing different parts to serve different functions - the fixed portion maintains structural stability while the variable portion enables size variation through movement along the slide rail.
Solution Approach 2:
A slide rail is introduced as an intermediary component between the frames to guide and constrain the movement of the flexible display. The slide rail ensures that the variable portion moves in a controlled manner along a predetermined path, preventing frame distortion while enabling size variation.
2Adaptability or versatility
If the structure is made variable to enable deformation, then the adaptability is improved, but the manufacturing precision and structural integrity worsen
Solution Approach 1:
The mobile terminal employs a dynamic structure where the second frame and flexible display variable portion can move relative to the first frame along the slide rail. This dynamic design allows the structure to adapt to different size requirements while maintaining manufacturing precision through guided movement constraints.
Solution Approach 2:
Different portions of the flexible display have different properties - the fixed portion is securely attached to maintain structural precision, while the variable portion is designed to move along the slide rail. This local differentiation allows the system to achieve both deformability and manufacturing precision.
3Measurement precision
If a sensing system is added to detect extension and contraction, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The sensing system replaces complex mechanical position detection mechanisms with electrical measurement. Voltage detection between the sensing terminal and ground terminal provides precise position information through simple electrical measurements, reducing mechanical complexity while improving measurement precision.
Solution Approach 2:
The slide rail serves multiple functions - it acts as both a mechanical guide for the flexible display movement and as part of the sensing system through the sensing terminal. This multi-functionality reduces overall device complexity by combining structural and sensing roles in a single component.
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 solution effectively prevents frame distortion and allows for accurate adjustment of the video output size, enhancing the usability and stability of the mobile terminal.
Implementation Method 1
a sensing terminal located on the slide rail, a sensing resistor connected to the sensing terminal, an input resistor positioned between a power supply unit and the sensing resistor, a detecting unit for measuring a voltage between the sensing resistor and the input resistor
Data Source
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Figure 3(a)~3(b)
AI summary
A mobile terminal including a sensing unit for detecting a movement between a first frame and a second frame movable in a first direction or a second direction opposite to the first direction with respect to the first frame may accurately determine a position of the second frame, and may slidably move stably.