Vertical Signal Lines for Display Panel Aperture Ratio
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Solution Overview
Problem
Conventional liquid crystal display panels face limitations in reducing the width of signal lines, which decreases the aperture ratio as the size of the display increases or resolution improves, leading to decreased electrical conductivity.
Innovation Solution
The display panel employs a vertical structure for gate and data lines, where the thickness is greater than the width, improving the aperture ratio while maintaining electrical conductivity, achieved through specific manufacturing processes involving insulating layers and electrode formations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the width of signal lines is reduced to improve aperture ratio, then the aperture ratio is improved, but the electrical conductivity of signal lines deteriorates
Solution Approach 1:
The patent transforms the conventional horizontal signal line structure (where width > thickness) into a vertical structure (where thickness > width). This dimensional change allows the signal lines to maintain sufficient electrical conductivity through increased thickness while reducing their horizontal width to improve aperture ratio. The vertical orientation enables the conductive path to extend in the thickness direction rather than the width direction, resolving the contradiction between conductivity and aperture ratio.
Solution Approach 2:
The patent changes the geometric parameters of signal lines by inverting the aspect ratio relationship. Instead of width being the dominant dimension, thickness becomes the dominant dimension. This parameter transformation allows the signal lines to achieve both high conductivity (through sufficient thickness) and high aperture ratio (through reduced width), directly addressing the technical contradiction.
2Reliability
If the width of signal lines is increased to maintain electrical conductivity, then the electrical conductivity is maintained, but the aperture ratio decreases
Solution Approach 1:
The patent resolves this contradiction by shifting the conductivity assurance from the horizontal width dimension to the vertical thickness dimension. The vertical structure allows thickness to承担 the primary role in electrical conduction while width is minimized for aperture ratio improvement, thus maintaining conductivity without sacrificing aperture ratio.
Solution Approach 2:
The patent transforms the signal line geometry parameters by making thickness the dominant dimension rather than width. This parameter inversion enables the signal lines to achieve adequate conductivity through increased thickness while maintaining small width for high aperture ratio, directly resolving the contradiction between these two parameters.
Data Source
AI summary
A display panel includes gate lines extending in a first direction, a first column insulating layer between the gate lines, a gate electrode disposed on the first column insulating layer. The first column insulating layer, the gate lines, and the gate electrode are covered by a gate insulating layer. An active layer is disposed on the gate insulating layer. Source and drain electrodes are disposed above the active layer. Data lines are connected to the source electrode. A second column insulating layer is interposed between the data lines and includes a first contact hole to expose the drain electrode. A contact electrode is disposed in the first contact hole and connected to the drain electrode, a second contact hole is formed through a protective layer to correspond to the first contact hole, and a pixel electrode is connected to the contact electrode through the second contact hole.