Display Apparatus Contact Hole Base Voltage Connection
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Solution Overview
Problem
The quality of images displayed by electroluminescence panels is degraded due to unstable base voltage supply, which increases signal wiring resistance and reduces maximum brightness, especially in larger displays with higher resolution, making it difficult to secure sufficient space for connections and increasing manufacturing complexity.
Innovation Solution
A display apparatus with a contact hole structure that includes a metal substrate, an electroluminescence display panel featuring a first contact hole and a base voltage pad, and a conductive filler that electrically connects the metal substrate to the base voltage pad through a second contact hole, ensuring stable voltage supply without the need for conductive tape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive tape is used to connect the base voltage pad to the printed circuit board, then the base voltage supply is stabilized, but the assembly process complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts and eliminates the conductive tape from the assembly by integrating the base voltage connection directly into the substrate structure through contact holes, thereby simplifying the assembly process while maintaining voltage supply stability
Solution Approach 2:
The invention merges the base voltage connection function with the substrate structure by forming contact holes that directly connect the base voltage pad to the printed circuit board, combining multiple functions into a single integrated structure
2Reliability
If the periphery area is increased to accommodate connections, then the base voltage supply is stabilized, but the display area is reduced
Solution Approach 1:
The invention transitions from a planar connection approach to a three-dimensional structure by forming contact holes that extend vertically through the substrate, enabling stable electrical connection without increasing the horizontal periphery area
3Measurement precision
If the signal wiring width is reduced to increase resolution, then the display resolution is improved, but the electrical resistance of signal wirings increases
Solution Approach 1:
The invention applies different structural characteristics to different regions: narrow signal wirings for high resolution in the display area, and dedicated contact hole structures for stable voltage connection in the periphery area, allowing each region to optimize its local performance
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
This configuration stabilizes the base voltage supply to the cathode, improving image quality by reducing electrical resistance and eliminating the need for conductive tape, thus simplifying assembly and reducing manufacturing costs.
Implementation Method 1
a conductive filler, filled in the first contact hole and the second contact hole, electrically connecting the metal substrate and the base voltage pad
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
According to the present disclosure, a display apparatus may include a metal substrate (110), an electroluminescence display panel (120), including a first contact hole (H1) and a base voltage pad (VSS) adjacent to the first contact hole, on the metal substrate, a first adhesive member (130), including a second contact hole (H2) exposing at least a portion of an upper surface of the base voltage pad, on the electroluminescence display panel, and a conductive filler (160), filled in the first contact hole and the second contact hole, electrically connecting the metal substrate and the base voltage pad.