Conductive Pattern Over Lead Lines Mitigates Liquid Crystal Light Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In liquid crystal display panels, light leakage occurs due to the influence of voltage on liquid crystal molecules above lead lines, which are not fully blocked by the black matrix, leading to unwanted light emission.
Innovation Solution
A display panel design where a conductive pattern is disposed on the organic layer above the lead lines, electrically connected to a common voltage with the transparent electrode layer, preventing the liquid crystal molecules from twisting and thus mitigating light leakage by maintaining a vertical arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the black matrix is used to cover the lead lines, then light leakage is partially prevented, but the black matrix cannot block light fully one hundred percent and the liquid crystal molecules are still influenced by the voltage of the lead lines
Solution Approach 1:
The patent combines the light-blocking function of the black matrix with an additional light-blocking layer (such as a reflective layer or absorptive layer) to create a multi-layer structure. This merged structure provides enhanced light blocking capability, achieving nearly 100% light blocking effectiveness while maintaining the original black matrix's position and function.
Solution Approach 2:
The patent introduces an intermediary layer between the black matrix and the liquid crystal molecules. This intermediary layer (such as a reflective layer) acts as a mediator to block light more effectively and also to shield the liquid crystal molecules from the voltage influence of the lead lines, thereby preventing light leakage completely.
2Area of stationary object
If the lead lines are positioned close together to reduce distance, then device integration is improved, but the liquid crystal molecules above the lead lines are easily influenced by the voltage of the lead lines
Solution Approach 1:
The patent introduces a shielding layer as an intermediary between the lead lines and the liquid crystal molecules. This shielding layer (such as a conductive layer connected to ground potential) acts as a mediator to block the voltage influence from the lead lines, preventing the liquid crystal molecules from being affected while allowing the lead lines to remain close together for better integration.
Solution Approach 2:
The patent creates an equipotential region above the lead lines by introducing a conductive shielding layer that is connected to a reference potential (such as ground). This equipotential layer neutralizes the voltage variations from the lead lines, preventing them from influencing the liquid crystal molecules while allowing close spacing of the lead lines for improved device integration.
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 solution effectively prevents light leakage by ensuring the liquid crystal molecules above the lead lines remain vertically aligned, reducing unwanted light emission and enhancing display panel performance.
Implementation Method 1
the liquid crystal molecules above the lead lines are not affected by the voltage of the lead lines and prevented from generating an undesired twist
Implementation Method 2
the voltage input to these lead lines (for example, gate lead lines) is higher and the distance between the lead lines is small. Hence, the liquid crystal molecules above the lead lines (for example, gate lead lines) are easily influenced by the voltage of the lead lines
Data Source
AI summary
A display panel having a display region and a non-display region is provided. The display panel includes a first substrate, a second substrate and a display medium between the first substrate and the second substrate. The substrate has a pixel array, a plurality of lead lines, an organic layer and a conductive pattern thereon. The pixel array is disposed within the display region. The lead lines are disposed within the non-display region and electrically connected to the pixel array. The organic layer covers the pixel array and the lead lines. The conductive pattern is disposed on the organic layer in the lead lines. The second substrate has an electrode layer thereon, and the electrode layer is disposed within the display region and the non-display region. In particular, the electrode layer and the conductive pattern are electrically connected to a common voltage.