Six-Pixel Display Layout for Expanded Color Gamut
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Solution Overview
Problem
Existing display devices using light-emitting elements have a limited color gamut that cannot fully satisfy human visual perception, necessitating an expansion of the color reproduction area.
Innovation Solution
The display device incorporates a plurality of picture elements with specific chromaticity coordinates and emission spectrums, utilizing different materials, thicknesses, and color filters to enhance color reproduction, specifically in the CIE-XY chromaticity diagram.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional light-emitting elements with limited emission spectrums are used, then the device structure remains simple, but the color reproduction area is insufficient to satisfy human visual perception
Solution Approach 1:
The display device divides each picture element into multiple pixels (first pixel, second pixel, third pixel, fourth pixel, fifth pixel, sixth pixel), where each pixel contains a light-emitting element with a specific emission spectrum. This segmentation allows the system to cover a broader color gamut by combining emissions from multiple specialized light-emitting elements, resolving the contradiction between color accuracy and structural simplicity.
Solution Approach 2:
Different pixels within the same picture element are assigned different emission characteristics (e.g., first and second pixels have emission spectrums with peaks at different wavelengths). This local differentiation of emission properties enables precise color control in specific regions while maintaining overall color reproduction accuracy across the entire picture element.
2Measurement precision
If multiple light-emitting elements with different emission spectrums are combined in each picture element, then the color reproduction area expands, but the device structure becomes more complex
Solution Approach 1:
Each picture element serves multiple functions by integrating six different pixels with distinct emission characteristics. This multi-functional design allows a single picture element to cover the entire visible spectrum through combinatorial emission, eliminating the need for separate color filtering systems and reducing overall device complexity despite the increased pixel count.
Solution Approach 2:
The patent employs light-emitting elements with different emission spectrums (including organic EL, inorganic EL, and LED types) as composite functional units within each picture element. This composite approach combines the advantages of different light-emitting materials to achieve broad spectrum coverage while maintaining the modular structure of individual pixels, balancing color gamut expansion with structural manageability.
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 solution significantly expands the color reproduction area, enabling brighter and more accurate color expression within the visible spectrum.
Implementation Method 1
A display device having a light-emitting element which includes a layer of an organic material between a pair of electrodes and emits light when a current is supplied between the electrodes
Implementation Method 2
the present invention relates to a display device having a layer including an organic material, a fluorescent material, or a phosphorescent material in the light-emitting element
Data Source
AI summary
To improve color reproduction areas in a display device having light-emitting elements. A display region has a plurality of picture elements. Each picture element includes: first and second pixels each including a light-emitting element which has a chromaticity whose x-coordinate in a CIE-XY chromaticity diagram is 0.50 or more; third and fourth pixels each including a light-emitting element which has a chromaticity whose y-coordinate in the diagram is 0.55 or more; and fifth and sixth pixels each including a light-emitting element which has a chromaticity whose x-coordinate and y-coordinate in the diagram are 0.20 or less and 0.25 or less, respectively. The light-emitting elements in the first and second pixels have different emission spectrums from each other; the light-emitting elements in the third and fourth pixels have different emission spectrums from each other; and the light-emitting elements in the fifth and sixth pixels have different emission spectrums from each other.