Display Panel Fixed-Potential Shielding for Bright-Spot Prevention
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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 are caused by negative voltage electric fields affecting liquid crystal redirection, leading to incomplete or no response, and increased production costs and reduced efficiency.
Innovation Solution
A display panel design incorporating a shielding unit connected to a fixed potential, such as earth or common potential, is used to shield the negative voltage electric field between the connection unit and pixel units, preventing light leakage and bright spots by ensuring proper liquid crystal redirection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the first transparent conductive layer is used to achieve transition between metal layers, then the production procedure is simplified, but light leakage and bright spots occur due to negative voltage electric field affecting liquid crystal redirection
Solution Approach 1:
The patent introduces a shielding layer as an intermediary element 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, thereby preventing light leakage and bright spots while allowing the simplified transparent conductive layer transition to remain in place
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 harmful electric field lines, transforming the problematic electric field interaction into a controlled shielding effect that protects the liquid crystal orientation while maintaining the electrical connection function
2Length of moving object
If the first transparent conductive layer is positioned close to the pixel unit to achieve narrow bezel, then the bezel width is reduced, but the negative voltage electric field effect intensifies causing more severe light leakage
Solution Approach 1:
The shielding layer serves as a protective intermediary positioned between the first transparent conductive layer and the liquid crystal layer. It specifically blocks the harmful electric field lines from the nearby transparent conductive layer while allowing the narrow bezel design to be maintained, as the shielding layer does not require additional lateral space
3Reliability
If contact holes are used for conversion connection between gate driving circuits and pixel units, then the connection is achieved, but production efficiency is reduced and cost increases due to added mask layer and procedure
Solution Approach 1:
The patent extracts and removes the problematic contact hole structure and its associated mask layer from the manufacturing process. Instead, it uses the first transparent conductive layer to directly achieve the conversion connection between metal layers, eliminating the need for contact holes and simplifying the production procedure while maintaining electrical connection reliability
Solution Approach 2:
The patent replaces the complex contact hole structure with a simpler transparent conductive layer approach. The transparent conductive layer serves as a disposable-like element that can be easily formed and removed or integrated, simplifying the overall manufacturing process and reducing production costs
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 shielding unit effectively prevents light leakage and bright spots, improving display quality and production 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.