Display Panel Connection Shielding for Edge Light Leakage
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Solution Overview
Problem
Existing display panels face issues with light leakage and bright spots on long edges due to the use of first transparent conductive layers for transitioning metal layers, which create negative voltage electric fields affecting liquid crystal redirection, leading to incomplete or no response, and increased production costs.
Innovation Solution
A display panel design featuring a connection unit between the gate driving unit and pixel units, with a shielding unit connected to a fixed potential, such as earth or common potential, to shield the negative voltage electric field and prevent light leakage by overlapping the connection unit's projection area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If first transparent conductive layers are used to achieve transition between metal layers, then production cost and procedure are reduced, but light leakage and bright spots occur due to negative voltage electric fields affecting liquid crystal redirection
Solution Approach 1:
The patent introduces a shielding layer as an intermediary component between the first transparent conductive layer and the liquid crystal layer. This shielding layer acts as a mediator that blocks the harmful negative voltage electric field from reaching the liquid crystal molecules, thereby preventing light leakage and bright spots while maintaining the simplified manufacturing process using first transparent conductive layers.
Solution Approach 2:
The patent converts the harmful negative voltage electric field effect into a beneficial solution by introducing the shielding layer. The shielding layer is specifically designed to block the electric field lines, transforming the problematic electric field interaction into a controlled shielding effect that protects the liquid crystal layer while allowing the first transparent conductive layer to maintain its electrical connection function.
2Reliability
If contact holes among different metal layers are used to achieve conversion connection, then connection reliability is improved, but production efficiency decreases and cost increases due to added mask layers and procedures
Solution Approach 1:
The patent extracts the harmful function of the first transparent conductive layer (creating negative voltage electric fields) from its electrical connection function. By removing the first transparent conductive layer's harmful electric field effect through the shielding layer, the design eliminates the need for complex contact hole structures while maintaining reliable electrical connections through simplified transparent conductive layer pathways.
3Length of moving object
If the distance between first transparent conductive layer and pixel unit is reduced to achieve narrow bezels, then bezel width is reduced, but electric field effect intensifies causing more light leakage and bright spots
Solution Approach 1:
The patent applies the anti-weight principle by introducing the shielding layer as a counteracting element that opposes and neutralizes the harmful negative voltage electric field. The shielding layer is positioned strategically to counterbalance the electric field effect that intensifies when the first transparent conductive layer is placed closer to the pixel unit for narrow bezel design, thereby preventing light leakage and bright spots while maintaining the reduced bezel width.
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
The design effectively shields negative voltage electric fields, preventing light leakage and bright spots, improving display quality and yield while reducing production costs and procedures.
Implementation Method 1
a shielding unit provided on the connection unit; wherein a projection area of the connection unit on the substrate corresponds to a projection area of the shielding unit on the substrate, and the shielding unit is electrically connected to a fixed potential
Data Source
AI summary
The invention provides a display panel, comprising: a substrate having a peripheral area and a display area adjacent to each other, the display area provided with a plurality of pixel units; a gate driving unit provided in the peripheral area; a connection unit provided between the gate driving unit and the display area, and electrically connected to the gate driving unit and the plurality of pixel unit; and a shielding unit provided on the connection unit; wherein a projection area of the connection unit on the substrate corresponds to a projection area of the shielding unit on the substrate, and the shielding unit is electrically connected to a fixed potential.