OLED Quad Pixel Architecture for Saturated Blue Color Rendering
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Solution Overview
Problem
Current OLED displays face limitations in rendering saturated blue colors due to the lack of a commercial blue OLED with sufficient device lifetime and high efficiency, leading to increased power consumption and reduced display lifetime.
Innovation Solution
A quad pixel configuration is employed, comprising a red, green, light blue, and deep blue organic light emitting device, where the deep blue device emits light with a peak wavelength at least 4 nm less than the light blue device, allowing for reduced power consumption and extended display lifetime while maintaining color gamut by minimizing deep blue device usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a commercial blue OLED with sufficient device lifetime and high efficiency is used, then saturated blue colors can be rendered, but such devices are currently unavailable leading to increased power consumption and reduced display lifetime
Solution Approach 1:
The blue color rendering function is segmented into two separate organic light emitting devices: one emitting light blue light and another emitting deep blue light. This segmentation allows the display to render a wide range of blue colors by combining emissions from both devices, achieving saturated blue color display without requiring a single high-performance blue OLED that would consume excessive power and have limited lifetime.
2Illumination intensity
If a commercial blue OLED with sufficient device lifetime and high efficiency is used, then saturated blue colors can be rendered, but such devices are currently unavailable leading to reduced display lifetime
Solution Approach 1:
The blue color rendering function is segmented into two separate organic light emitting devices: one emitting light blue light and another emitting deep blue light. This segmentation allows the display to render a wide range of blue colors by combining emissions from both devices, achieving saturated blue color display without requiring a single high-performance blue OLED that would have limited lifetime.
3Adaptability or versatility
If deep blue device usage is increased to achieve saturated blue colors, then color gamut is improved, but power consumption increases and device lifetime decreases
Solution Approach 1:
The patent employs partial action by using the deep blue light emitting device only when saturated blue colors are required, rather than continuously. The light blue light emitting device handles the majority of blue color rendering tasks. This partial usage of the deep blue device achieves the necessary color gamut while significantly reducing power consumption and extending device lifetime.
4Adaptability or versatility
If deep blue device usage is increased to achieve saturated blue colors, then color gamut is improved, but device lifetime decreases
Solution Approach 1:
The patent employs partial action by using the deep blue light emitting device only when saturated blue colors are required, rather than continuously. The light blue light emitting device handles the majority of blue color rendering tasks. This partial usage of the deep blue device achieves the necessary color gamut while significantly extending device lifetime.
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 enables the rendering of a wide range of colors with reduced deep blue device usage, resulting in lower power consumption and extended display lifetime, while allowing for a more saturated deep blue emission without significant loss in efficiency or lifetime.
Implementation Method 1
OLEDs make use of thin organic films that emit light when voltage is applied across the device
Data Source
AI summary
A device that may be used as a multi-color pixel is provided. The device has a first organic light emitting device, a second organic light emitting device, a third organic light emitting device, and a fourth organic light emitting device. The device may be a pixel of a display having four sub-pixels. The first device may emit red light, the second device may emit green light, the third device may emit light blue light and the fourth device may emit deep blue light. The device includes a first device plane and a second device plane. The first device plane comprises a plurality of the first organic light emitting device and a plurality of the second organic light emitting device. The second device plane comprises a plurality of at least one of the third organic light emitting device and the fourth organic light emitting device. The planes of the first and second device planes are parallel. The second device plane is transposed from the first device plane in a direction perpendicular to the planes of the first and second device planes. The first and second device planes are superposed.