OLED Display Panel Phase Retardation Layers Anti-Reflection
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Solution Overview
Problem
Conventional polarizers in organic light emitting diode (OLED) displays are thick and have integral phase retardation layers that cannot effectively convert all visible wavelengths, leading to light leakage and reduced anti-reflection ability.
Innovation Solution
The OLED display panel features a phase functional layer with multiple phase retardation layers, each corresponding to a pixel unit, and an optical functional layer with polarizing units, both designed to convert linearly polarized light to circularly polarized light, with barriers to prevent crosstalk, allowing for thinner construction and improved anti-reflective performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional polarizer with integral phase retardation layer is used, then the anti-reflection ability is improved, but the thickness of the display screen increases
Solution Approach 1:
The patent divides the integral phase retardation layer into multiple separate phase retardation layers with different retardation coefficients. Each layer targets specific wavelength ranges, allowing for thinner individual layers while collectively covering the entire visible spectrum, thus reducing total thickness while maintaining anti-reflection performance.
Solution Approach 2:
The patent applies different retardation coefficients to different phase retardation layers to optimize performance for specific wavelength ranges. This localized optimization allows each layer to be thinner while the combination achieves broad-spectrum effectiveness, resolving the contradiction between thickness and anti-reflection ability.
2Device complexity
If an integral phase retardation layer is used, then the structure is simple, but the retardation coefficient cannot meet phase requirements of entire visible wavelengths causing light leakage
Solution Approach 1:
The patent segments the phase retardation function into multiple layers, each with optimized retardation coefficients for specific wavelength ranges. This segmentation eliminates light leakage across the visible spectrum while keeping the overall structure relatively simple through systematic layer arrangement.
Solution Approach 2:
The patent uses composite phase retardation layers with different material properties and retardation coefficients. This composite structure enables each layer to address specific wavelength requirements, preventing light leakage while maintaining manageable structural complexity through organized composition.
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 configuration achieves effective extinction of incident light in single pixel areas, significantly reducing light leakage and enhancing the anti-reflective ability of the display, while enabling a thinner and lighter design.
Implementation Method 1
the phase retardation layers are configured to convert light having a linearly polarized light to a circularly polarized light
Implementation Method 2
a linearly polarized light layer, and multiple protective films
Data Source
AI summary
An organic light emitting diode display panel and a display device are provided. The display panel includes a display substrate and a phase functional layer disposed on the display substrate. The display substrate includes a plurality of pixel units. The phase functional layer includes a plurality of phase retardation layers. Each of the phase retardation layers is disposed corresponding to one of the pixel units. The phase retardation layer is configured to convert a linearly polarized light passing therethrough into a circularly polarized light. The display panel and the display device have good anti-reflective performance, so that a displayed image is not disturbed by external light and has high definition. Also, it is beneficial to realize a thin and light design of the display panel and display device.