Cover Panel Metal Layer Shielding Fingerprint Sensor
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Solution Overview
Problem
Display devices with integrated fingerprint sensing parts face challenges in maintaining optimal driving performance and concealing the fingerprint sensing component from external view while ensuring reliable operation.
Innovation Solution
A display device design featuring a cover panel with a metal layer that surrounds and shields the fingerprint sensing part, including a first metal layer and a second metal layer extending between the display panel and the fingerprint sensing part, which improves driving performance and conceals the sensing part from external visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fingerprint sensing part is disposed on the rear surface of the display panel, then the fingerprint sensing function is integrated into the display device, but the fingerprint sensing part becomes visible from the outside and driving performance may be compromised
Solution Approach 1:
The patent introduces a cover panel with metal layers that extends from the rear surface toward the front surface of the display panel, creating a three-dimensional shielding structure. This dimensional approach allows the fingerprint sensing part to remain functional on the rear surface while being concealed by the extending cover panel, resolving the contradiction between integration and visibility.
Solution Approach 2:
The cover panel with metal layers acts as an intermediary element between the fingerprint sensing part and the external environment. This intermediate structure provides both mechanical protection and visual concealment while maintaining the electrical and functional integrity of the fingerprint sensing part, allowing it to operate reliably without being directly exposed.
2Shape
If the fingerprint sensing part is covered by the display panel, then external visibility is prevented, but heat dissipation and operational reliability may be compromised
Solution Approach 1:
The cover panel is designed as a thin, flexible structure with metal layers that can extend and conform to the display panel's surface. This thin-film approach provides effective visual concealment and physical protection while maintaining sufficient thermal conductivity pathways for heat dissipation, preventing excessive heat buildup that would occur with thicker covering materials.
Solution Approach 2:
The cover panel incorporates metal layers within its structure, creating a composite material system that combines the optical properties needed for concealment with the thermal properties required for heat dissipation. The metal layers provide both structural integrity and thermal conduction pathways, allowing the covered fingerprint sensing part to operate reliably without overheating.
3Shape
If a metal layer is introduced to shield the fingerprint sensing part, then visibility is prevented and heat management is improved, but device complexity increases
Solution Approach 1:
The cover panel is designed to perform multiple functions simultaneously: it provides visual concealment of the fingerprint sensing part, offers mechanical protection, enables heat dissipation through integrated metal layers, and maintains structural integrity. By consolidating these multiple functions into a single multi-functional component, the patent avoids the complexity that would arise from adding separate components for each function.
Solution Approach 2:
The patent merges the concealment function, protection function, and heat management function into a single integrated cover panel structure. The metal layers are incorporated directly into the cover panel rather than being separate components, reducing the overall number of parts and simplifying the assembly process while achieving multiple technical objectives simultaneously.
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 enhances the driving performance of the fingerprint sensing part and prevents external visibility, ensuring stable recognition of fingerprints while effectively managing heat dissipation and operational reliability.
Implementation Method 1
The cover panel is covered by the display panel and includes a metal layer. The metal layer includes a first metal layer and a second metal layer. The first metal layer surrounds the fingerprint sensing part in a plan view. The second metal layer extends from the first metal layer and is disposed between the display panel and the fingerprint sensing part.
Implementation Method 2
The fingerprint sensing method may include a capacitance method for sensing a change in capacitance generated between electrodes
Implementation Method 3
an ultrasonic method for sensing vibration using a piezoelectric body
Data Source
AI summary
A display device includes a display panel, a fingerprint sensing part, and a cover panel. The fingerprint sensing part is covered by the display panel. The cover panel is covered by the display panel and includes a metal layer. The metal layer includes a first metal layer and a second metal layer. The first metal layer surrounds the fingerprint sensing part in a plan view. The second metal layer extends from the first metal layer and is disposed between the display panel and the fingerprint sensing part.