Flexible Display Panel Inclined Pin Alignment
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Solution Overview
Problem
Flexible display panels face misalignment issues due to the large expansion coefficient of polyimide materials in flexible circuit boards, leading to potential short circuits and reduced product yield.
Innovation Solution
The flexible display panel design features pins on the substrate and circuit board inclined at specific angles, allowing for accurate alignment by adjusting the position of the circuit board relative to the substrate, ensuring proper connection and improving manufacturing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible circuit board made of polyimide material is used, then flexibility and bendability are improved, but misalignment of pins occurs due to large expansion coefficient
Solution Approach 1:
The patent changes the geometric parameters of the pins by inclining them relative to the central axis of the flexible circuit board. This inclination angle is specifically designed to compensate for the expansion and contraction of the polyimide material, ensuring that the pins remain aligned with their corresponding contacts on the flexible substrate despite thermal or mechanical dimensional changes.
Solution Approach 2:
The patent introduces asymmetry in the pin configuration by inclining the pins at specific angles rather than arranging them symmetrically along the central axis. This asymmetric arrangement creates a geometric compensation mechanism that counteracts the symmetric expansion and contraction of the flexible circuit board material, maintaining alignment accuracy.
2Weight of moving object
If the flexible circuit board is made thin to achieve lightness, then weight reduction is achieved, but the board becomes more susceptible to deformation by expansion or contraction
Solution Approach 1:
The patent changes the geometric parameters of the pin arrangement by introducing inclination angles. This parameter modification allows thin flexible circuit boards to maintain pin alignment accuracy despite dimensional changes, as the inclined geometry compensates for expansion and contraction effects that would otherwise cause misalignment in thinner, more flexible boards.
Solution Approach 2:
The patent applies a preemptive compensation mechanism by pre-inclining the pins at specific angles before the flexible circuit board undergoes expansion or contraction. This beforehand geometric adjustment cushions against future dimensional changes, ensuring that pins remain aligned with their corresponding contacts even when the thin board deforms due to environmental factors.
3Ease of manufacture
If pins are aligned straight without inclination, then manufacturing simplicity is maintained, but pin misalignment occurs causing short circuits
Solution Approach 1:
The patent modifies the geometric parameter of pin orientation by introducing a specific inclination angle relative to the central axis. This parameter change maintains manufacturing simplicity as the inclined angle can be incorporated into the standard pin fabrication process, while simultaneously improving electrical connection reliability by compensating for board expansion and contraction that would otherwise cause misalignment and short circuits.
Data Source
AI summary
The present application provides a flexible display panel including a flexible substrate and a flexible circuit board electrically connected to the flexible substrate. Pins on the flexible substrate and the flexible circuit board are disposed to be inclined at a certain angle. When pitches of the pins on the flexible circuit board are changed due to expansion and contraction of the flexible circuit board itself, an accurate alignment of the pins on the flexible substrate and the flexible circuit board can be realized by adjusting the position of the flexible circuit board relative to the flexible substrate before connecting the flexible circuit board to the flexible substrate, thereby ensuring the quality of the flexible display panel and improving product yield of the display panel.