Oblique Display Terminals Preventing Shift
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Solution Overview
Problem
In the bonding process of display devices, terminals tend to shift along the width direction, leading to short circuits and decreased yield due to dense terminal arrangements and alignment challenges.
Innovation Solution
The terminals are obliquely disposed along the lateral edges of the display panel with adjacent edges parallel, and the flexible printed wiring substrate features corresponding second connection terminals, with uniform cross-sectional shapes such as trapezoids, isosceles trapezoids, triangles, or angle bracket shapes, enhancing the safety shift and preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If terminals are arranged densely to increase resolution, then display resolution is improved, but alignment precision deteriorates causing terminal shift and short circuits
Solution Approach 1:
The patent applies asymmetry by designing connection terminals with non-symmetric cross-sectional shapes (trapezoid, triangle, parallelogram, or angle bracket) and oblique lateral edges. This asymmetric geometry creates a directional alignment constraint that prevents terminal shift during bonding, thereby maintaining manufacturing precision even as display resolution increases with denser terminal arrangements
Solution Approach 2:
The patent introduces a new dimensional constraint by tilting the lateral edges of connection terminals at an angle between 0-85 degrees relative to the bonding direction. This angular orientation in the bonding plane creates a geometric lock that restricts terminal movement, adding a dimensional control mechanism that prevents shift while allowing dense terminal spacing for high resolution
2Device complexity
If single row terminal design is used to simplify structure, then device complexity is reduced, but reliability deteriorates due to terminal shift and short circuits
Solution Approach 1:
The asymmetric cross-sectional shape of connection terminals with oblique lateral edges creates a geometric constraint that inherently prevents terminal shift during bonding. This simple geometric modification to the terminal shape itself provides reliability improvement without adding complex alignment mechanisms or multiple terminal rows, thus maintaining low device complexity while enhancing bonding reliability
3Quantity of substance
If space between terminals is reduced to increase density, then quantity of terminals is improved, but manufacturing precision deteriorates causing alignment difficulties
Solution Approach 1:
The asymmetric terminal geometry with oblique lateral edges creates a directional alignment constraint that becomes more effective as terminals are placed closer together. The angular orientation (0-85 degrees) provides a geometric guide that maintains alignment precision even when terminal spacing is minimized to increase terminal density for high-resolution displays
Solution Approach 2:
By introducing the angular dimension of oblique lateral edges, the patent adds a rotational constraint that prevents terminal shift in the bonding direction. This dimensional addition allows terminals to be densely packed while the angular orientation maintains manufacturing precision by providing a geometric alignment reference during the bonding process
Data Source
AI summary
A display device is provided and includes a display panel and a flexible printed wiring substrate. The display panel is provided with a binding structure. The binding structure includes a plurality of first connection terminals arranged along a width direction of the display panel; and a flexible printed wiring substrate is electrically connected to the bonding structure of the display panel. Each of the first connection terminals is obliquely disposed along a lateral edge of the width direction of the display panel, and adjacent lateral edges of two of the adjacent first connection terminals along the width direction of the display panel are parallel to each other.