Conductive Black Matrix for OLED Illumination Uniformity
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Solution Overview
Problem
Top emitting OLED display panels face issues with illumination uniformity due to lower conductivity and significant IR drop in translucent electrodes, leading to darker illumination in the middle of the panel and varying brightness.
Innovation Solution
A display panel with a conductive black matrix layer formed between color filter matrices, where the black matrices have electrical conductivity and correspond to the position of the transparent electrode, improving the electrical conductivity of the translucent electrode and reducing IR drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a translucent electrode made of transparent metal oxide or thin metal layer is used, then the OLED structure achieves proper luminescence performance and microcavity effect, but the electrical conductivity is lower and significant IR drop occurs in large area panels
Solution Approach 1:
The patent combines the black matrix layer with a conductive layer to create a hybrid structure. The black matrix maintains its light absorption function while the integrated conductive layer provides enhanced electrical conductivity, allowing the translucent electrode to achieve both proper luminescence performance and reduced IR drop in large area panels
Solution Approach 2:
The invention uses composite materials by integrating a conductive layer (such as ITO, IZO, or other transparent conductive materials) with the black matrix layer. This composite structure provides both the optical properties needed for microcavity effect and the electrical conductivity required to reduce IR drop, resolving the contradiction between luminescence performance and electrical conductivity
2Illumination intensity
If the transparent electrode is made with thin metal layer or transparent metal oxide, then the electrode achieves translucency, but the conductivity is significantly reduced
Solution Approach 1:
The invention employs composite materials by creating a hybrid structure where the black matrix layer is integrated with a conductive layer. This composite provides both the translucency needed for electrode function and the enhanced electrical conductivity required to overcome the limitations of thin metal layers or transparent metal oxides alone
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 implementation of conductive black matrices enhances the electrical conductivity of the translucent electrode, thereby improving illumination uniformity across the display panel.
Implementation Method 1
the black matrices have electrical conductivity, and a position of the black matrices corresponds to a position of a transparent electrode
Data Source
AI summary
A display panel and a method of manufacturing the same are provided. The method includes: forming a color filter layer on a glass substrate, the color filter layer including a plurality of color resist matrices having a plurality of colors; forming a black matrix layer between the color resist matrices having the plurality of colors, the black matrix layer including a plurality of black matrices, wherein the black matrices have electrical conductivity, and a position of the black matrices corresponds to a position of a transparent electrode. In the above manner, uniformity of light emission of the display panel can be effectively improved.