Display Panel Recessed Pixel Electrode Insulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels with touch sensor functions face challenges in achieving high light transmittance while preventing noise from data lines from reaching the pixel electrode and reducing parasitic capacitance between the touch sensor line and the common electrode, as existing configurations increase the distance between the pixel and common electrodes, weakening the electrical field effect.
Innovation Solution
A display panel configuration with a data line, a common electrode in an upper layer, a first insulating layer covering the common electrode, a touch sensor line connected to the common electrode through an opening in the insulating layer, and a pixel electrode partially disposed in a recessed portion of a second insulating layer, which reduces parasitic capacitance and enhances light transmittance by maintaining a strong electrical field effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first insulating layer and second insulating layer are disposed between the pixel electrode and the common electrode to insulate the sensor electrode line, then the parasitic capacitance between the sensor electrode line and common electrode is reduced, but the distance between the pixel electrode and common electrode increases, resulting in a weakened electrical field effect and reduced light transmittance
Solution Approach 1:
The second insulating layer is selectively disposed only in the region where the sensor electrode line is located, rather than covering the entire area between pixel electrode and common electrode. This localized insulation approach reduces parasitic capacitance between the sensor electrode line and common electrode while maintaining a strong electrical field effect in the display region, thereby preserving light transmittance.
2Object-affected harmful factors
If the common electrode is disposed between the pixel electrode and data signal line to provide electrical field shielding, then noise from the data signal line is prevented from reaching the pixel electrode, but the distance between the pixel electrode and common electrode increases, reducing the electrical field effect and light transmittance
Solution Approach 1:
A dedicated shielding electrode layer is introduced as an intermediary component between the data signal line and pixel electrode. This shielding electrode is positioned adjacent to the data signal line and connected to a shielding electrode potential (typically ground or common electrode potential), creating an electrical field shield that redirects noise away from the pixel electrode without increasing the distance between pixel electrode and common electrode, thus preserving light transmittance.
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 prevents noise from reaching the pixel electrode, reduces parasitic capacitance, and improves light transmittance by allowing a stronger electrical field effect between the pixel and common electrodes.
Implementation Method 1
the display panel is configured to drive the liquid crystal by generating a transverse electrical field between the pixel electrode in the upper layer and the common electrode in the lower layer. As a result, noise from the data signal line disposed in a lower layer below the common electrode is electrical-field-shielded by the common electrode
Implementation Method 2
drive the liquid crystal by generating a transverse electrical field between the pixel electrode in the upper layer and the common electrode in the lower layer
Implementation Method 3
the second insulating layer is disposed in an interior of the second opening, and formed with a recessed portion recessed downward into a portion above the second opening, and at least a portion of the pixel electrode is disposed in the recessed portion of the second insulating layer
Data Source
AI summary
A display panel includes a common electrode formed in an upper layer above a data line, a first insulating layer covering the common electrode, a touch sensor line formed in an upper layer of the first insulating layer and in a first opening provided in the first insulating layer, and connected to the common electrode via the first opening, a second insulating layer covering the touch sensor line, and a pixel electrode formed in an upper layer of the second insulating layer. The first insulating layer is formed with a second opening between the common electrode and the pixel electrode. The second insulating layer is disposed in an interior of the second opening and formed with a recessed portion recessed downward into a portion above the second opening. At least a portion of the pixel electrode is disposed in the recessed portion of the second insulating layer.