Blue Sub-Pixel Light Converting Layer for DCI-P3 Color Gamut
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Solution Overview
Problem
Traditional display devices, such as LCDs, face challenges in generating a blue primary color that meets the DCI-P3 color gamut requirements due to limitations in blue light emission.
Innovation Solution
A display device is designed with a blue sub-pixel that includes a light emitting unit and a light converting layer, where the ratio of the intensity integral of the output spectrum from 380 nm to 493 nm to that from 494 nm to 580 nm is adjusted between 5 to 20, using quantum dot materials to convert input light into output light that matches the blue primary color of the DCI-P3 color gamut.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional light emitting diode is used for blue sub-pixel, then device complexity is reduced, but color accuracy for DCI-P3 blue primary cannot be achieved
Solution Approach 1:
The patent introduces a light converting layer as an intermediary between the light emitting unit and the external environment. This layer converts the light from the LED into a spectrum that matches the DCI-P3 blue primary color requirements, resolving the contradiction between using simple traditional LEDs and achieving accurate color reproduction.
Solution Approach 2:
The patent changes the spectral parameters of the emitted light by using a light converting layer with specific optical properties. By adjusting the conversion characteristics of this layer, the output spectrum is modified to match the DCI-P3 blue primary color coordinates, thereby improving color accuracy without changing the fundamental LED structure.
2Manufacturing precision
If light converting layer is added to achieve DCI-P3 blue primary color, then color accuracy is improved, but device complexity increases
Solution Approach 1:
The light converting layer serves multiple functions simultaneously: it converts the LED light to match DCI-P3 blue primary color, maintains adequate brightness, and ensures proper spectral distribution. This multi-functionality justifies the added complexity by delivering comprehensive performance improvements in a single component.
3Adaptability or versatility
If intensity integral ratio is adjusted to match DCI-P3 blue primary, then color gamut compliance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent systematically adjusts the intensity integral ratio parameter of the light converting layer to match DCI-P3 blue primary color specifications. By controlling this spectral parameter, the invention achieves compliance with DCI-P3 color gamut requirements while establishing clear manufacturing targets for the light converting layer's optical properties.
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
The display device effectively generates a blue color that complies with the DCI-P3 color gamut, enhancing the visual experience by accurately reproducing the blue primary color, which can range from cyanish blue to purplish blue depending on the ratio.
Implementation Method 1
using quantum dot materials to convert input light into output light that matches the blue primary color of the DCI-P3 color gamut
Data Source
AI summary
A display device is provided and includes at least one sub-pixel that is a blue sub-pixel. The sub-pixel includes a transistor and a light emitting unit electrically connected to the transistor. The sub-pixel emits an output light under an operation of the highest gray level, the output light is a final visual light of the blue sub-pixel of the display device, the output light having an output spectrum, an intensity integral of the output spectrum from 380 nm to 493 nm defines as a first intensity integral, an intensity integral of the output spectrum from 494 nm to 580 nm defines as a second intensity integral, a ratio of the first intensity integral over the second intensity integral defines as a first ratio, and the first ratio ranges from 5 to 20.