Display Pad Alignment via Tilted Converging Lines
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Solution Overview
Problem
The bonding process between display panels and flexible wiring substrates in electronic devices often suffers from misalignment due to differing elongation rates of materials, leading to reduced bonding reliability and potential defects.
Innovation Solution
The use of a pad region configuration with first and second pad groups, each with pads extending along imaginary lines tilted at predetermined angles, converging at different points, and a method involving primary alignment followed by y-axis correction to ensure accurate alignment and bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional bonding process is used, then bonding speed is maintained, but misalignment occurs due to differing elongation rates of materials
Solution Approach 1:
The pads are pre-configured with tilted imaginary lines converging at different points before bonding occurs. This preliminary geometric arrangement compensates for elongation differences that will occur during bonding, ensuring that pads remain aligned despite material expansion variations.
Solution Approach 2:
The patent changes the geometric parameters of pad arrangement by tilting imaginary lines at predetermined angles and converging them at different points. This parameter modification allows the pad structure to accommodate and compensate for elongation rate differences between materials during bonding.
2Reliability
If pad alignment is improved through complex configuration, then bonding reliability increases, but device complexity increases
Solution Approach 1:
The patent applies local quality by making each pad group have its own specific tilted imaginary lines converging at a unique point. This localized geometric configuration optimizes alignment for each specific pad group while maintaining overall system simplicity through a systematic pattern.
Data Source
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AI summary
A display panel includes a display configured to display an image by receiving a drive signal, and a pad region including first and second pads groups configured to receive the drive signal from an outside and to provide the received drive signal to the display, wherein the first pad group (PG1) includes a plurality of first pads (PD1) extending along a plurality of first imaginary lines (L1), the first imaginary lines being tilted at a predetermined angle with respect to a reference line (RX), wherein the second pad group (PG2) includes a plurality of second pads (PD2) extending along a plurality of second imaginary lines (L2), the second imaginary lines being tilted at a predetermined angle with respect to the reference line, and wherein the plurality of first imaginary lines converges into a first point (P1) and the plurality of second imaginary lines converges into a second point (P2), the first and second points being located at different positions.