Asymmetric Fingerprint Sensor Placement for Operation Unit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electronic devices with fingerprint sensors of shorter length than the operation unit face challenges in enhancing ease of operation due to limited effective sensing area, which affects usability and cost efficiency.
Innovation Solution
The electronic device incorporates a fingerprint sensor with its sensing unit displaced from the center of the operation unit, allowing a larger effective sensing area and improved ease of operation, even with a sensor shorter than the operation unit, by optimizing the sensor's placement and wiring allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fingerprint sensor with shorter length than the operation unit is used, then cost and versatility are improved, but ease of operation deteriorates due to limited effective sensing area
Solution Approach 1:
The sensing unit is positioned asymmetrically within the operation unit, specifically at one end rather than centered. This asymmetric placement allows the sensing unit to be shorter than the operation unit while still providing adequate sensing coverage for fingerprint operations, resolving the contradiction between sensor size and operational effectiveness
2Ease of operation
If the length of the operation unit is increased to enhance ease of operation, then ease of operation is improved, but the effective area of the fingerprint sensor must also be increased which increases cost and reduces versatility
Solution Approach 1:
By positioning the sensing unit asymmetrically at one end of the operation unit, the design allows the operation unit to be longer for better ease of operation while the sensing unit remains compact. This asymmetric configuration decouples the size requirements of the operation unit from the sensing unit, allowing independent optimization of both parameters
3Ease of manufacture
If the sensing unit covers only a partial area of the operation unit, then cost is reduced, but ease of operation decreases due to limited contact area
Solution Approach 1:
The asymmetric positioning of the sensing unit at one end of the operation unit creates an optimized coverage pattern. The sensing unit covers the critical area where fingerprint contact occurs during typical usage, providing sufficient effective sensing area for ease of operation while maintaining a compact size for cost efficiency
Data Source
AI summary
An electronic device includes: an operation unit including a fingerprint sensor, a longitudinal direction of the operation unit being defined as a first direction; and a processor that performs fingerprint authentication processing and processing to respond to movement of a finger of a user in the first direction on the operation unit, based on a detection result by the fingerprint sensor, in which a sensing unit of the fingerprint sensor is displaced from the center of the operation unit in the first direction.