Grooved Color Resist Display Panel for Low Crosstalk Aperture
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Solution Overview
Problem
Conventional liquid crystal display panels face a serious vertical crosstalk problem as pixel size decreases, leading to increased coupling capacitance and reduced aperture ratio, which is exacerbated in high-resolution displays like 8K panels.
Innovation Solution
The display panel incorporates a color resist layer with grooves on either side of the data line, a shielding layer covering the data line, and a passivation layer between the shielding and pixel electrode layers, reducing coupling capacitance and enhancing the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the distance between the data signal line and the pixel electrode is increased to reduce coupling capacitance, then the vertical crosstalk is reduced, but the aperture ratio of the pixel is reduced and transmittance is lowered
Solution Approach 1:
A shielding layer is introduced as an intermediary component between the data signal line and the pixel electrode. This shielding layer acts as a mediator that blocks the capacitive coupling between these two elements, reducing vertical crosstalk without requiring increased separation distance. The shielding layer is positioned at a specific depth within the color resist layer to optimally intercept electric field lines while maintaining compact pixel structure.
Solution Approach 2:
The patent modifies the physical and electrical parameters of the color resist layer by introducing grooves and positioning the shielding layer at specific depths. These parameter changes create regions of different dielectric properties and electric field distribution, allowing the shielding layer to effectively reduce coupling capacitance while maintaining the original geometric proximity between data lines and pixel electrodes, thus preserving aperture ratio.
2Reliability
If the thickness of the data signal line is increased to support higher resolution displays, then the signal strength is improved, but the coupling capacitance increases and vertical crosstalk worsens
Solution Approach 1:
The shielding layer serves as a protective intermediary that shields the pixel electrode from the enhanced but potentially harmful electric fields generated by thicker data signal lines. This allows the data lines to maintain increased thickness for signal strength while the shielding layer prevents excessive capacitive coupling and crosstalk.
3Object-affected harmful factors
If a shielding layer is added to reduce coupling capacitance, then the vertical crosstalk is reduced, but the device complexity increases
Solution Approach 1:
The shielding layer is merged with the color resist layer structure, utilizing the same material layer for dual purposes: color filtering and electromagnetic shielding. The grooves are formed within the color resist layer itself, combining multiple functions (color definition, shielding positioning, and capacitance reduction) into a single integrated structure rather than adding separate independent components.
Solution Approach 2:
The color resist layer is given multiple functions: it serves as the color filtering layer, provides the structural matrix for grooves, and houses the shielding layer for crosstalk reduction. This multi-functionality reduces the need for additional dedicated layers and simplifies the overall device architecture despite the added shielding capability.
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
This configuration effectively minimizes vertical crosstalk and improves the aperture ratio by reducing coupling capacitance and preventing short circuits, allowing for better image display quality in high-resolution panels.
Implementation Method 1
a shielding layer disposed on the color resist layer and arranged over the data line
Implementation Method 2
apply a driving voltage to the two substrates to control a rotation direction of the liquid crystal molecules, so as to refract the light from the backlight module to produce images
Data Source
AI summary
The present invention is about display technology. A display panel and a display device are provided. The display panel includes: a substrate layer; a data line arranged on the substrate layer; a color resist layer which is arranged on the substrate layer and located at two sides of the data line, and includes grooves which are located at least at one side of the data line; a shielding layer arranged on the color resist layer and arranged over the data line; a pixel electrode layer arranged over the shielding layer; and a passivation layer arranged between the shielding layer and the pixel electrode layer and covering the shielding layer and the color resist layer.