OLED Light Emitting Layer with Oriented Polymer Fibers for Polarized Emission
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Solution Overview
Problem
Conventional OLED display devices suffer from strong reflection of ambient light, leading to decreased contrast and adverse effects on display quality, especially under high ambient brightness, due to the lack of polarization performance in emitted light, resulting in significant light absorption by linearly polarized anti-reflection films.
Innovation Solution
Incorporating a light emitting layer with fibers of p-phenylene based polymer as a host material, arranged in a specific orientation to emit linearly polarized light, and using a linearly polarized anti-reflection film with a transmission direction parallel to the polarization direction of the emitted light, allowing 100% transmission of the emitted light while absorbing ambient light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a linearly polarized anti-reflection film is used to reduce ambient light reflection, then contrast is improved, but brightness and light transmittance are reduced due to absorption of emitted light
Solution Approach 1:
The patent changes the polarization state parameter of the emitted light from unpolarized to linearly polarized by using oriented p-phenylene based polymer fibers. This parameter change allows the anti-reflection film to transmit the emitted light fully while still blocking ambient light, resolving the contradiction between contrast improvement and brightness maintenance
Solution Approach 2:
The patent converts the previously harmful effect of the anti-reflection film absorbing emitted light into a beneficial effect by matching the polarization directions. The film that previously caused brightness loss now fully transmits the polarized light while maintaining its ability to block ambient light reflection, thus converting the harm into benefit
2Illumination intensity
If conventional OLED materials are used to maintain high brightness, then light transmittance is improved, but contrast deteriorates due to strong ambient light reflection
Solution Approach 1:
The patent changes the polarization parameter of the emitted light from unpolarized to linearly polarized. This enables the system to simultaneously achieve high light transmittance (100% transmission of polarized light) and high contrast (rejection of ambient light) by matching the polarization direction with the anti-reflection film's transmission axis
3Object-affected harmful factors
If the polarization direction of emitted light does not match the transmission direction of the anti-reflection film, then ambient light reflection is reduced, but brightness is significantly reduced due to light absorption
Solution Approach 1:
The patent changes the polarization direction parameter of the emitted light to match the transmission direction of the anti-reflection film. By controlling the orientation of p-phenylene based polymer fibers, the emitted light's polarization direction is aligned with the film's transmission axis, eliminating energy loss while maintaining reflection reduction
Solution Approach 2:
The patent replaces the mechanical alignment process (manually adjusting the anti-reflection film's transmission direction to match emitted light) with a molecular-level orientation control system. The p-phenylene based polymer fibers are oriented during manufacturing to inherently emit polarized light in the desired direction, eliminating the need for subsequent mechanical alignment and reducing energy loss
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 approach enhances brightness and light transmittance while achieving high contrast by ensuring that only linearly polarized light is transmitted, effectively reducing external light interference and improving display performance.
Implementation Method 1
the light emitting layer includes fibers of p-phenylene based polymer as a host material, and the fibers of p-phenylene based polymer are arranged in a first orientation; wherein the light emitted from the fibers of p-phenylene based polymer arranged in the first orientation is linearly polarized light in a first direction
Implementation Method 2
a linearly polarized anti-reflection film arranged on an out-light surface of the OLED display panel, wherein the linearly polarized anti-reflection film includes a linear polarizer having a light transmission direction parallel to the first direction
Data Source
AI summary
The present disclosure provides an organic light emitting diode (OLED) device and a method for manufacturing the same, an OLED display substrate and an OLED display device. The OLED device of the present disclosure comprises a substrate, and a first electrode, a light emitting layer and a second electrode arranged on the substrate, wherein the light emitting layer comprises fibers of p-phenylene based polymer as a host material, and the fibers of p-phenylene based polymer are arranged in a first orientation; and wherein the light emitted by the fibers of p-phenylene based polymer arranged in the first orientation is linearly polarized light in a first direction. The OLED device of the present disclosure can simultaneously ensure a good contrast, brightness and light transmittance.