Display Panel Buffer Layer to Prevent Black Matrix Residue
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Solution Overview
Problem
The utilization of a color film layer to replace the polarizer in display panels results in miscibility issues between the color film layer and the touch control layer, leading to residue on the touch control layer, affecting light-emitting efficiency and display quality.
Innovation Solution
Incorporating a buffer layer between the optical film layer and the touch control layer, where the materials are immiscible, ensuring the orthographic projection of the buffer layer covers the light filtering units, thereby separating the black matrices from the planarization layer, reducing residue and maintaining light transmittance and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a color film layer is used to replace the polarizer, then the thickness of the display panel is reduced and brightness is increased, but the color film layer and touch control layer become miscible causing residue and reduced light-emitting efficiency
Solution Approach 1:
A buffer layer is introduced as an intermediary between the optical film layer (containing black matrices) and the touch control layer (containing planarization layer). This buffer layer prevents direct contact between the black matrices and planarization layer, eliminating the miscibility issue while preserving the benefits of using color film layer to replace polarizer for reduced thickness and increased brightness.
2Ease of manufacture
If the color film layer is directly manufactured on the touch control layer, then the manufacturing process is simplified, but the miscibility between layers causes residue that affects light-emitting efficiency
Solution Approach 1:
The buffer layer serves as a mediator that maintains manufacturing simplicity while solving the residue problem. It is positioned between the optical film layer and touch control layer, preventing direct contact between incompatible materials (black matrices and planarization layer) during the manufacturing process, thereby eliminating residue formation without significantly complicating the manufacturing流程.
3Productivity
If the black matrices directly contact the planarization layer during manufacturing, then the manufacturing process is straightforward, but residue is left on the touch control layer reducing light transmittance
Solution Approach 1:
The buffer layer acts as a protective intermediary that prevents direct contact between black matrices and planarization layer during manufacturing. This eliminates residue formation on the touch control layer, ensuring high light transmittance for light emitted by sub-pixel units, while maintaining manufacturing efficiency through a straightforward layering process.
Data Source
AI summary
A display panel and a display apparatus. The display panel includes: a light-emitting device layer including a base plate and a light-emitting layer arranged in stack; a touch control layer including touch control electrodes and a planarization layer covering the touch control electrodes; a buffer layer arranged at a side of the planarization layer away from the light-emitting device layer; an optical film layer arranged at a side of the buffer layer away from the touch control layer and including a plurality of black matrices and a plurality of light filtering units arranged in the same layer as the black matrices; a material of the buffer layer and a material of the planarization layer are immiscible, and an orthographic projection of the buffer layer on the base plate covers an orthographic projection of the light filtering units on the base plate.