OEL Display Apparatus with Tuned Color Filter
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Solution Overview
Problem
Conventional white light organic electroluminescence (OEL) displays face limitations in achieving full-color performance due to unpredictability in luminous efficiency and service life, making them unsuitable for practical applications.
Innovation Solution
The display apparatus combines an OEL device with a color filter, where the light emitting spectrum of the OEL device is adjusted to have peaks in specific wavelength bands and the color filter's spectrum is matched to enhance color performance, achieving desired correlated color temperatures (CCT) and improved display characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the structure of the OEL device is changed to achieve specific color performance, then the color display capability is improved, but the luminous efficiency and service life are influenced negatively
Solution Approach 1:
The invention divides the color display system into two independent parts: the OEL device (white light source) and the color filter layer. The color filter layer is segmented into multiple sub-layers (e.g., red, green, blue filters) that can be independently optimized. This segmentation allows the OEL device to maintain its optimal structure for luminous efficiency while the color filter handles color performance requirements.
Solution Approach 2:
The color filter layer acts as an intermediary between the white light OEL device and the final color display output. Instead of modifying the OEL device structure, the invention introduces a color filter intermediary that converts the white light into specific color wavelengths, thereby achieving color display capability without affecting the OEL device's luminous efficiency or service life.
2Illumination intensity
If the structure of the OEL device is changed to achieve specific color performance, then the color display capability is improved, but the product design becomes unpredictable
Solution Approach 1:
By segmenting the color display function into a separate color filter layer, the invention simplifies the overall product design. The OEL device structure remains standardized and predictable, while the color filter parameters can be independently adjusted to meet specific color performance requirements, making the design process more controllable and predictable.
Solution Approach 2:
The invention enables color performance adjustment through parameter changes in the color filter layer (such as filter wavelengths, optical densities, and layer thicknesses) rather than changing the OEL device structure. This approach maintains design predictability because color filter parameters can be precisely controlled and optimized without affecting the fundamental OEL device architecture.
3Use of energy by moving object
If a white light OEL device is used with a color filter to achieve full-color display, then the conversion efficiency is maintained high, but the color performance is limited
Solution Approach 1:
The invention optimizes color performance by carefully selecting and adjusting the parameters of the color filter layer, including filter wavelengths, optical densities, and layer configurations. These parameter changes enable the system to achieve broader color gamut and better color accuracy while maintaining the high conversion efficiency of the white light OEL device.
Solution Approach 2:
The invention uses a composite structure combining the white light OEL device with a multi-layer color filter system. This composite approach allows the system to leverage the high efficiency of the OEL device while the composite color filter layers work together to expand the color display capability, achieving both high efficiency and superior color performance.
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 allows for adjustable light emitting spectrum of the OEL device to meet various display requirements, enhancing color performance and achieving better display effects by matching the filter spectrum with the OEL device's spectrum, resulting in improved color gamut and display quality.
Implementation Method 1
An OEL device is a semiconductor device that can convert electrical energy into light energy
Implementation Method 2
the color filter is used for receiving and converting the light into color light
Data Source
AI summary
A display apparatus includes an organic electroluminescence (OEL) device and a color filter. At different correlated color temperatures (CCTs), a light emitting spectrum of the OEL device is adjusted to meet specific display requirements and improve the display quality of the display apparatus. In addition, a light filtering spectrum of the color filter is adjusted simultaneously to match the light emitting spectrum of the OEL device, so that the display apparatus has an excellent display effect.