Display Panel Test Area Segmentation for Pixel Electrode Measurement
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Solution Overview
Problem
Current display panel technologies cannot separately measure the voltage-brightness characteristic curves of main and sub-pixel electrodes, making it difficult to study and design effective pixel electrode structures for improved viewing angle performance.
Innovation Solution
A display panel with separate test areas for main and sub-pixel electrodes, shielded by a light shielding layer, allows for accurate measurement of their respective voltage-brightness characteristic curves, enabling precise evaluation and design support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a pixel electrode unit is divided into main pixel electrode and sub-pixel electrode to improve viewing angle, then viewing angle performance is improved, but measurement capability is worsened because only overall voltage-brightness characteristic curve can be measured
Solution Approach 1:
The pixel electrode layer is divided into main pixel electrodes and sub-pixel electrodes with different brightness characteristics. By segmenting the pixel electrode layer and assigning different functions to main and sub-pixel electrodes, the patent achieves both improved viewing angle performance and separate measurability through the light shielding layer configuration
Solution Approach 2:
The light shielding layer selectively shields main pixel electrodes in the first test area while leaving sub-pixel electrodes exposed, and vice versa in the second test area. This extraction approach allows separate measurement of voltage-brightness characteristic curves for main and sub-pixel electrodes, resolving the measurement capability issue
2Measurement precision
If light shielding layer is added to enable separate measurement, then measurement precision is improved, but device complexity is worsened
Solution Approach 1:
The light shielding layer serves multiple functions: it shields light during separate measurement of main and sub-pixel electrodes, maintains display functionality in non-test areas, and can be integrated with existing pixel structures. This multi-functionality reduces the impact of added complexity
Solution Approach 2:
The light shielding layer is selectively applied only in specific test areas rather than uniformly across the entire display. In the first test area, it shields main pixel electrodes; in the second test area, it shields sub-pixel electrodes. This localized approach enables separate measurement while minimizing overall structural complexity
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
Enables accurate measurement and evaluation of voltage-brightness characteristics for both main and sub-pixel electrodes, facilitating improved design and evaluation of pixel electrode structures for enhanced viewing angle performance.
Implementation Method 1
a light shielding layer arranged on the pixel electrode layer; wherein, in a direction perpendicular to the array substrate, an orthographic projection of the light shielding layer covers orthographic projections of each of the main pixel electrodes located in the first test area and each of the sub-pixel electrodes located in the second test area
Data Source
AI summary
A display panel and a test method thereof are provided in the preset disclosure. The display panel includes a first test area and a second test area; the display panel also includes an array substrate, a pixel electrode layer, and a light shielding layer, wherein the pixel electrode layer includes a plurality of pixel electrode units, and in a direction perpendicular to the array substrate, an orthographic projection of the light shielding layer covers orthographic projections of each main pixel electrode in the first test area and each sub-pixel electrode in the second test area.