Display Screen Assembly with Bent FPC for Integrated Fingerprint Chip
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Solution Overview
Problem
Conventional display screen designs with integrated fingerprint modules occupy excessive space and have complex stacking and connection issues, making them unsuitable for full-screen mobile terminals.
Innovation Solution
A display screen assembly featuring a flexible printed circuit board with a bent portion electrically connected to the display screen, a fingerprint chip integrated on the circuit board, and a through hole in the shock-proof layer for accommodating the fingerprint chip, which simplifies the design and reduces space occupation by integrating the fingerprint identification function directly onto the display screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fingerprint module is stacked on the back side of the display screen, then the fingerprint identification function is achieved, but the overall space of the mobile terminal increases excessively
Solution Approach 1:
The patent merges the fingerprint module with the display screen by integrating the fingerprint recognition chip directly onto the back side of the display screen, eliminating the need for separate stacking. The circuit board is designed with a bent portion that allows direct mounting of the fingerprint chip on the display screen substrate, combining two previously separate components into one integrated structure.
Solution Approach 2:
The patent utilizes the back side of the display screen as a new dimension for component placement. Instead of stacking the fingerprint module in front of or behind the display screen as a separate layer, the fingerprint recognition chip is mounted on the back side of the display screen substrate, effectively using the z-dimension of the display screen itself for component integration.
2Reliability
If the fingerprint module is stacked on the back side of the display screen, then the fingerprint identification function is achieved, but the structural complexity and connection complexity increase
Solution Approach 1:
The patent combines the circuit board and fingerprint module into a single integrated structure. The circuit board is designed with a bent portion that allows it to serve both as the substrate for the display screen and as the mounting platform for the fingerprint recognition chip, eliminating separate connection structures and reducing overall structural complexity.
Solution Approach 2:
The circuit board is designed to perform multiple functions: it serves as the substrate for the display screen, provides electrical connections for the display, and simultaneously acts as the mounting platform for the fingerprint recognition chip. This multi-functional design reduces the number of separate components and simplifies the overall structure.
Data Source
Figure 1~3
AI summary
A display screen assembly and a mobile terminal are provided. The display screen assembly includes a display screen, a shock-proof layer and a flexible printed circuit board which are sequentially laminated. The flexible printed circuit board includes a circuit board body and a bent portion extending from the circuit board body toward the display screen; the bent portion is electrically connected to the display screen; a fingerprint chip is arranged on a first surface of the circuit board body; and the circuit board body is electrically connected to the fingerprint chip; the first surface is an end surface of the circuit board body that is facing the display screen; a through hole for accommodating the fingerprint chip is arranged in the shock-proof layer at a position corresponding to the fingerprint chip.