Anti-reflective Integrated Touch Display Panel for OLED
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Solution Overview
Problem
The high reflectivity of metal layers in top-emitting OLED structures increases manufacturing costs and reduces display quality due to the need for expensive circular polarizers, which also limits flexibility and brightness.
Innovation Solution
An anti-reflective integrated touch display panel is designed with a layered structure comprising silicon oxide, silicon nitride, strontium oxide, and molybdenum layers, integrated between substrates, which reduces light reflectivity and enhances transmittance, allowing for the replacement of circular polarizers and improving flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a circular polarizer is attached to reduce external light reflection, then light reflectivity is reduced, but manufacturing cost increases and transmittance decreases
Solution Approach 1:
The patent extracts and eliminates the circular polarizer component from the display structure, replacing it with an anti-reflective coating layer that achieves the same light reflection reduction function without the need for expensive polarizing films, thereby reducing manufacturing cost while maintaining anti-glare performance
Solution Approach 2:
The patent changes the optical parameters of the display panel by introducing an anti-reflective coating with specific refractive index and thickness parameters that optimize light reflection reduction, replacing the parameter-based solution of circular polarizers with a more cost-effective optical coating approach
2Object-affected harmful factors
If a circular polarizer is attached to reduce external light reflection, then light reflectivity is reduced, but transmittance decreases and brightness is reduced
Solution Approach 1:
The patent optimizes the optical parameters of the anti-reflective coating layer, including refractive index and thickness, to achieve maximum light reflection reduction while minimizing impact on light transmittance and display brightness, thereby resolving the trade-off between anti-glare performance and brightness
3Object-affected harmful factors
If a circular polarizer is attached to reduce external light reflection, then light reflectivity is reduced, but thickness increases and flexibility is reduced
Solution Approach 1:
The patent removes the circular polarizer component that adds significant thickness to the display panel, replacing it with a thin anti-reflective coating layer that provides the same optical function with minimal thickness increase, thereby preserving display flexibility and enabling foldable applications
4Area of stationary object
If metal layers are used in top-emitting OLED structure, then aperture ratio is improved, but light reflectivity increases and contrast is affected
Solution Approach 1:
The patent introduces an anti-reflective coating layer as an intermediary between the metal layers and external environment, which reduces light reflection from the metal surfaces while maintaining the high aperture ratio benefits of the top-emitting OLED structure, thereby improving contrast without sacrificing aperture
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 solution reduces light reflectivity, increases transmittance, and enhances display brightness, while lowering manufacturing costs and improving flexibility, thus addressing the limitations of traditional polarizers and maintaining good optical properties.
Implementation Method 1
an anti-reflective structure 300... the anti-reflective structure 300 may reduce the reflection of external light and enhance the transmittance
Implementation Method 2
A material of the first insulating layer 310 includes silicon oxide (SixOy) or silicon nitride (SiNx), and a thickness of the first insulating layer 310 is 0.1 to 2 micrometers
Data Source
AI summary
An anti-reflective integrated touch display panel includes an anti-reflective structure and touch electrodes. The anti-reflective structure includes a first insulating layer, a second insulating layer disposed on the first insulating layer, a conducting layer disposed on the second insulating layer, a third insulating layer disposed on the second insulating layer, and a fourth insulating layer disposed on the third insulating layer. The first insulating layer includes silicon oxide or silicon nitride, and has a thickness of 0.1 to 2 micrometers. The second insulating layer includes silicon oxide or strontium oxide, and has a thickness of 0.001 to 0.1 micrometer. The conducting layer includes molybdenum, and has a thickness of 0.01 to 0.05 micrometer. The fourth insulating layer includes silicon nitride, and has a thickness of 0.001 to 0.3 micrometer. The touch electrodes are disposed between the third insulating layer and the fourth insulating layer.