Display Panel Organic Film Shielding for Light Leakage
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Solution Overview
Problem
In large-sized LCD display panels, metal wires such as gate lines and data lines create edge electric fields that cause light leakage, which is difficult to fully block without reducing transmittance.
Innovation Solution
A display panel design featuring an organic film layer positioned on a side of the signal lines away from the substrate, with the organic film layer's projection covering the signal line projection, effectively shielding the edge electric fields and reducing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a black mask with sufficient width is used to block light leakage, then light leakage is effectively blocked, but the transmittance of the display panel decreases
Solution Approach 1:
An organic film layer is introduced as an intermediary substance between the signal line and the liquid crystal layer. This organic film layer has high dielectric constant and serves as a mediator to shield the edge electric field generated by the signal line, thereby reducing light leakage without requiring a wide black mask that would block light
Solution Approach 2:
The dielectric constant parameter of the medium between the signal line and liquid crystal layer is changed by using an organic film layer with high dielectric constant (κ≥3.5). This parameter change enhances the shielding effect on the edge electric field, allowing effective light leakage prevention with minimal impact on transmittance
2Illumination intensity
If the black mask width is reduced to maintain high transmittance, then transmittance is improved, but light leakage blocking capability deteriorates
Solution Approach 1:
The organic film layer acts as an intermediary that provides electric field shielding functionality previously requiring a wide black mask. By placing this high dielectric constant material close to the signal line, the system achieves light leakage prevention with a minimal or eliminated black mask, thereby maintaining high transmittance
Solution Approach 2:
The solution moves from a two-dimensional planar blocking approach (wide black mask on the same plane) to a three-dimensional layered approach (organic film layer positioned at a specific height above the signal line). This dimensional change allows shielding without sacrificing optical transmission area
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 organic film layer shields the edge electric fields, reduces the width of light leakage, and increases the panel's transmittance by allowing a narrower black mask and improved pixel design, resulting in a 27.5% increase in transmittance compared to conventional panels.
Implementation Method 1
an organic film layer, the organic film layer is arranged on a side of the signal line away from the substrate... the organic film layer comprises a top area and a side surface... an inclination angle of the side surface relative to a plane where the substrate is located is greater than or equal to 15°
Data Source
AI summary
The present application discloses a display panel and a method of manufacturing a display panel. The display panel comprises a substrate and a signal line arranged on the substrate, wherein the substrate comprises at least one display area, each display area comprises a plurality of pixel areas and a spacing area located between any two adjacent pixel areas of the plurality of pixel areas, the signal line is located within the spacing area, wherein the display panel further comprises an organic film layer, the organic film layer is arranged on a side of the signal line away from the substrate, and an orthographic projection of the organic film layer on the substrate covers an orthographic projection of the signal line on the substrate.