Organic Light-Emitting Display Optical Member Refraction
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Solution Overview
Problem
Existing organic light-emitting display apparatuses face limitations in increasing transmittance due to the use of reflection films, which lead to light loss, and struggle to achieve high color purity and efficiency in light transmission.
Innovation Solution
The implementation of an optical member with a high refractive index and low refractive index layers alternately stacked, using a block copolymer, which selectively reflects specific wavelengths of light, allowing for increased transmittance and reduced light loss without the need for reflection films, and is integrated with a TFT array substrate and circuit portions to enhance optical efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If reflection films are used in existing organic light-emitting display apparatuses, then light direction control is improved, but transmittance decreases and light loss increases
Solution Approach 1:
The patent changes the optical parameters by using an optical member with specific refractive index (higher than surrounding media) instead of traditional reflection films. This parameter change enables the system to control light direction through refraction rather than reflection, thereby reducing light loss and increasing transmittance while maintaining illumination control.
Solution Approach 2:
The optical member acts as an intermediary element between the light source and the external environment. It mediates light transmission by using its higher refractive index to control light direction, replacing the need for reflection films that cause energy loss. This intermediary approach achieves both light direction control and reduced light loss.
2Illumination intensity
If traditional reflection films are used, then light emission control is achieved, but color purity decreases
Solution Approach 1:
The patent changes the optical control mechanism from reflection-based to refraction-based by using an optical member with higher refractive index. This parameter change enables better color purity because refraction through the optical member preserves the spectral characteristics of the emitted light more effectively than reflection films, which tend to scatter and degrade color quality.
3Illumination intensity
If reflection films are implemented, then light output direction is controlled, but overall optical efficiency decreases
Solution Approach 1:
The optical member serves as an efficient intermediary that enhances optical efficiency by using its higher refractive index to control light direction through refraction. This approach minimizes energy loss compared to reflection films, thereby improving overall optical efficiency while maintaining light output direction control.
Solution Approach 2:
By changing from reflection-based light control to refraction-based control using an optical member with higher refractive index, the system achieves better optical efficiency. The refraction mechanism preserves more light energy and reduces scattering losses, thereby improving productivity in terms of optical efficiency while maintaining directional control.
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 enhances the transmittance and color purity of the organic light-emitting display apparatus, reducing light loss and enabling the display of high-color-purity images by selectively reflecting only specific wavelengths, thereby improving the overall optical efficiency.
Implementation Method 1
an optical member with a high refractive index and low refractive index layers alternately stacked, using a block copolymer, which selectively reflects specific wavelengths of light
Implementation Method 2
an optical member with a high refractive index and low refractive index layers alternately stacked
Data Source
AI summary
An organic light-emitting display apparatus includes a first emission portion and an optical member. The first emission portion emits light of a first color, and includes a first intermediate layer, a first electrode that is disposed on one surface of the first intermediate layer and transmits light emitted from the first intermediate layer, and a second electrode that is disposed on another surface of the first intermediate layer facing the one surface of the first intermediate layer and transmits the light emitted from the first intermediate layer. The optical member is disposed on one surface of the first emission portion and selectively reflects light of particular colors including at least the first color light.