Display Panel Electrode Layout for Higher Opening Rate

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Solution Overview

Problem

Existing display panels require a larger area for shading between electrodes of different polarity, leading to a lower opening rate due to the need for multiple grooves and a larger light-shielding layer.

Innovation Solution

The display panel design includes a common electrode layer with a groove between the common electrode and the first electrode, and a light-shielding layer with a light-shielding part that covers the orthographic projections of the electrodes and groove, reducing the number of grooves and light-shielding area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple electrodes with different polarity are separated by grooves and light-shielding layers, then signal crosstalk is avoided, but the area required for shading increases and opening rate decreases

Engineering Contradiction:

Improvesignal isolationVSAvoidlight-shielding area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent merges the light-shielding function into the electrode structure itself by making the first electrode extend to cover the groove region. This integration eliminates the need for separate light-shielding layers in those areas, reducing total light-shielding area while maintaining signal isolation between electrodes of different polarities

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The first electrode serves dual functions: it acts as an active electrode for display function and simultaneously provides light-shielding for the groove region. This multi-functionality reduces the need for dedicated light-shielding structures, thereby increasing the opening rate while maintaining electrode separation

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Object-affected harmful factors

If the light-shielding layer covers all electrodes and grooves, then shading is effective, but the opening rate of the display panel decreases

Engineering Contradiction:

Improvelight leakageVSAvoidopening rate

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

The patent extracts the light-shielding function from the dedicated light-shielding layer and transfers it to the electrode structure. By making the first electrode extend into the groove region, the need for light-shielding material in those areas is eliminated, reducing overall light-shielding area while maintaining effective shading where needed

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of adding light-shielding material over the electrodes and grooves, the patent inverts the approach by using the electrode itself as the light-shielding element. The first electrode is extended to cover the groove, turning the electrode from a purely functional element into a dual-purpose structure that also provides optical shielding

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS20250048732A1Display panels and preparation methods thereof

Publication Date: 2025.02.06 GUANGZHOU CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD

AI summary

The disclosure provides a display panel and a preparation method thereof. The display panel includes an array substrate and an opposite substrate. The array substrate includes a first substrate, a common electrode layer, a first metal layer, a second substrate, and a light-shielding layer. The common electrode layer includes a common electrode, a first electrode, and a groove, and the groove is disposed between the common electrode and the first electrode. The light-shielding layer includes a light-shielding part, and an orthographic projection of the light-shielding part on the first substrate covers an orthographic projection of the first electrode on the first substrate, an orthographic projection of the second electrode on the first substrate, and an orthographic projection of the groove on the first substrate.