Flexible Substrate Stacking for Display Frame Width Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In display devices, particularly those requiring high-definition and miniaturization, the COG mounting method limits frame width reduction due to external form interference between driving components and flexible substrates for image and functional units, leading to increased non-display area and compromised miniaturization.
Innovation Solution
A display device configuration featuring a display panel with a first flexible substrate connected to one end and a signal-transmission substrate to the other end, where the driving component is mounted on the flexible substrate, and a second flexible substrate connected to functional units closer to the display panel than the driving component, avoiding external form interference and allowing for miniaturization and reduced frame width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the driving component is mounted on the flexible substrate for image display in a longitudinal arrangement to handle high-definition terminals, then the number of terminals can be increased, but external form interference occurs with the flexible substrate for functional units
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional stacked arrangement. The driving component is positioned on a first flexible substrate that is stacked on the display panel, while the flexible substrate for functional units is positioned on a second flexible substrate at a different vertical level. This spatial separation in the thickness direction eliminates external form interference while maintaining the longitudinal arrangement needed for high-definition terminal connections.
Solution Approach 2:
The patent implements a nested structure where multiple flexible substrates are stacked vertically. The first flexible substrate carrying the driving component is nested on the display panel, and the second flexible substrate carrying the functional units is nested on the first flexible substrate. This nested arrangement allows both substrates to coexist in a compact space without interfering with each other's layout.
2Object-affected harmful factors
If the flexible substrate for functional units is arranged on the outside of the flexible substrate for image display to avoid interference, then external form interference is eliminated, but the flexible substrate protrudes from the display panel increasing the overall device size
Solution Approach 1:
Instead of arranging the flexible substrate for functional units outside the display panel in the plane direction, the patent positions it in the thickness direction by stacking it on the first flexible substrate. This vertical arrangement eliminates the need for the substrate to protrude from the display panel boundaries, maintaining a compact frame width while avoiding external form interference.
Solution Approach 2:
The patent utilizes flexible substrates that can be stacked in the thickness direction without increasing the planar dimensions. The flexibility of these thin film substrates allows them to be arranged in a compact stacked configuration, eliminating protrusion from the display panel while maintaining electrical connectivity and avoiding interference with the driving component.
3Area of stationary object
If the driving component is mounted on a hard circuit board arranged on the same plane as the transparent substrate, then wiring area is secured, but the frame width cannot be reduced further
Solution Approach 1:
The patent moves the driving component from the same plane as the transparent substrate to a different vertical level by mounting it on a flexible substrate that is stacked on the display panel. This three-dimensional arrangement secures adequate wiring area on the flexible substrate while reducing the frame width, as the component no longer occupies lateral space on the same plane as the display area.
Solution Approach 2:
The patent replaces the hard circuit board with a flexible substrate that can be stacked on the display panel. This flexible film allows the driving component to be positioned in the thickness direction rather than the plane direction, securing wiring area through the flexible substrate's surface while minimizing the lateral footprint and reducing frame width.
Data Source
AI summary
A display device includes a display panel, a functional unit internally or exteriorly installed in the display panel, a first flexible substrate and connected to one end part of the display panel, a signal-transmission substrate connected to another end part of the first flexible substrate and configured to transmit a driving signal to the first flexible substrate, a driving component mounted on the first flexible substrate and configured to process and supply a signal from the signal-transmission substrate to the display panel to drive the display panel and display an image, and a second flexible substrate having one end part that is connected to the functional unit and another end part that is connected to a part of the first flexible substrate that is closer to the display panel than a display panel side end edge of the driving component that is mounted on the first flexible substrate.