Integrated Liquid Layer Acceleration Sensor for Compact Displays
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Solution Overview
Problem
Current mobile terminals have a low degree of integration of acceleration sensors due to individual manufacturing and separate placement on the motherboard, resulting in a less compact and more costly structure.
Innovation Solution
An acceleration sensor is integrated with the display device by manufacturing it synchronously with the display region structure, utilizing two electrodes with a liquid layer in a cavity, where the liquid layer moves due to inertia, causing a change in capacitance that allows for displacement and acceleration calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If acceleration sensor is manufactured separately and placed on motherboard, then manufacturing precision can be maintained, but degree of integration is low and device complexity increases
Solution Approach 1:
The acceleration sensor is merged with the display device by manufacturing both components synchronously on the same substrate. The sensor electrodes are formed integrally with the display electrode structures, eliminating the need for separate manufacturing and assembly processes. This integration reduces device complexity while maintaining manufacturing precision through unified fabrication processes.
2Ease of manufacture
If acceleration sensor is manufactured separately and placed on motherboard, then ease of manufacture is improved, but degree of integration is low and structure is less compact
Solution Approach 1:
The acceleration sensor and display device are merged into a single integrated structure manufactured synchronously. The sensor components are formed within the same fabrication process as the display electrodes, creating a compact unified structure that improves ease of manufacture while achieving high integration and compactness.
3Ease of manufacture
If acceleration sensor is manufactured separately and placed on motherboard, then manufacturing process is simpler, but production cost increases
Solution Approach 1:
The acceleration sensor manufacturing is merged with the display device fabrication process. Both components are manufactured synchronously using the same substrate and fabrication steps, eliminating separate manufacturing operations. This integration reduces production costs through process consolidation and economies of scale while maintaining manufacturing simplicity.
4Measurement precision
If liquid layer is provided in cavity between electrodes, then acceleration and displacement detection precision is improved, but device complexity increases
Solution Approach 1:
The liquid layer in the cavity serves multiple functions simultaneously: it acts as the sensing medium for acceleration detection, provides mechanical support for the electrode structures, and enables displacement measurement through capacitance changes. This multi-functionality improves measurement precision while avoiding the need for additional separate components that would increase device complexity.
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
This approach enhances the degree of integration, achieves a compact structure, and reduces production costs while effectively sensing acceleration and displacement.
Implementation Method 1
a liquid layer (14) is provided in the cavity (13), and the liquid layer (14) occupies a portion of internal space of the cavity (13)... the liquid layer moves due to inertia
Implementation Method 2
two electrodes arranged opposite to and insulated from each other... causing a change in capacitance that allows for displacement and acceleration calculation
Data Source
Figure 1a~1b
Figure 1c~2b
Figure 3a~4a
AI summary
An acceleration sensor, a display device, a detecting system and a detecting method are provided; the acceleration sensor (10) includes two electrodes (11, 12) arranged opposite to and insulated from each other, and a cavity (13) arranged between the two electrodes (11, 12); a liquid layer (14) is arranged in the cavity (13), and the liquid layer (14) occupies a portion of internal space of the cavity (13). A display device integrated with the acceleration sensor (10) has advantages such as high degree of integration, compact structure and low production cost and so on.