Top Chassis Assembly for Narrow Bezel LCD Display
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display (LCD) devices face challenges in achieving a narrow bezel due to the need for additional bonding areas to connect flexible printed circuit boards to driving printed circuit boards, resulting in increased bezel width and step coverage, which hinders innovative design development.
Innovation Solution
A top chassis assembly that omits the bonding area by using a contact unit, such as a metal pad pattern or probe unit film, directly contacting pads on the display panel's non-display area, allowing for a reduced bezel width by eliminating the need for additional bonding areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bonding area is used to connect flexible printed circuit boards to driving printed circuit boards, then the connection reliability is improved, but the bezel width increases
Solution Approach 1:
The patent extracts the bonding area from the display panel structure by using a separate top chassis assembly with contact units. The contact units make direct contact with pads on the display panel through the top chassis, eliminating the need for bonding areas on the display panel itself while maintaining electrical connection reliability.
Solution Approach 2:
The top chassis assembly acts as an intermediary between the display panel and the flexible printed circuit board. The contact units on the top chassis mediate the electrical connection by contacting pads on the display panel and connecting to the FPCB, replacing the direct bonding approach and enabling bezel reduction.
2Reliability
If additional bonding areas are provided for circuit board connections, then the electrical connection is improved, but the device complexity increases
Solution Approach 1:
The patent merges the support function and the electrical connection function into a single top chassis assembly. The top chassis both supports the display panel and provides contact units for electrical connection, eliminating the need for separate bonding areas and reducing overall device complexity.
Solution Approach 2:
The top chassis assembly serves multiple functions: it supports the display panel, provides electrical connection through contact units, and enables bezel reduction. This multi-functional design simplifies the overall device structure by consolidating multiple components into one assembly.
Data Source
AI summary
A top chassis assembly includes a top chassis and a contact unit. The top chassis surrounds a non-display area of a display panel. The non-display area includes a pad part through which a signal is provided to the display panel. The contact unit is disposed at an inner surface of the top chassis and contacts the pad part on the non-display area of the display panel.