Display Shield-Can Mounting on Cover Member for Impact Stability
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Solution Overview
Problem
Shield-cans used to shield electromagnetic interference in miniaturized electronic devices tend to detach from the circuit board due to impacts, compromising the reliability and stability of the display device.
Innovation Solution
A display device design where the shield-can is attached to a flat surface of a cover member rather than a stepped portion of the circuit board, enhancing adhesive force and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shield-can is attached to the stepped portion of the circuit board, then the electromagnetic interference shielding function is provided, but the shield-can separates from the circuit board when impact is applied
Solution Approach 1:
The patent introduces a cover member as an intermediary component between the shield-can and the circuit board. The cover member has a flat surface that provides a stable attachment area for the shield-can, eliminating the problem of the shield-can detaching from the stepped portion of the circuit board under impact.
Solution Approach 2:
The patent transitions from attaching the shield-can directly to the circuit board surface (2D attachment) to attaching it to a cover member that extends in the thickness direction (3D structure). The cover member's flat surface provides a larger and more stable attachment area, improving the adhesive force and preventing detachment under impact.
2Device complexity
If the shield-can is attached directly to the circuit board, then the structure is simple, but the shield-can detaches under external impact
Solution Approach 1:
The cover member serves as a mediator that absorbs and distributes mechanical stress from external impacts, protecting the shield-can from direct impact forces that would cause detachment. This intermediary structure improves reliability without significantly complicating the overall device architecture.
Data Source
AI summary
A display device includes a display panel including a display area in which a plurality of pixels is disposed and a peripheral area surrounding at least a portion of the display area and including a pad area spaced apart from one side of the display area in a first direction, a circuit board disposed under the display panel and including a first area including a step portion and a second area spaced apart from the first area in a second direction intersecting the first direction and including a ground portion, a cover member covering the first area and the second area of the circuit board, and a fingerprint sensing module disposed under the cover member, contacting the cover member, and including a shield-can overlapping the first area of the circuit board in a plan view.