Hybrid Liquid Crystal and Light-Emitting Display for Wide Color Gamut
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Solution Overview
Problem
Display devices using light-emitting elements often produce images with narrow spectra, leading to intense contrast that can tire viewers and fail to display wide color gamut effectively.
Innovation Solution
A display device combining a liquid crystal element and a light-emitting element, where the liquid crystal element provides NTSC coverage of 20-60% and the light-emitting element offers BT.2020 coverage of 80-100%, utilizing a reflective liquid crystal element and a light-emitting element with an EL layer between reflective and semi-transmissive electrodes to achieve wide color gamut and reduced contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light-emitting elements with narrow spectra are used, then color purity is improved, but contrast becomes too intense and causes viewer fatigue
Solution Approach 1:
The patent combines a light-emitting element (providing high color purity with BT.2020 coverage of 80-100%) and a liquid crystal element with color filter (providing NTSC coverage of 20-60%) into a single display device. This merging allows the narrow-spectrum light from the light-emitting element to be optically modulated by the liquid crystal element, achieving both high color purity and reduced contrast intensity that causes viewer fatigue
Solution Approach 2:
The liquid crystal element acts as an intermediary between the light-emitting element and the viewer. It optically modulates the narrow-spectrum light from the light-emitting element, transforming it into light with balanced contrast that maintains color purity while reducing the intense contrast that causes viewer fatigue
2Measurement precision
If light-emitting elements with narrow spectra are used, then color purity is improved, but wide color gamut cannot be displayed effectively
Solution Approach 1:
The patent merges the light-emitting element (providing high color purity) with the liquid crystal element containing a color filter (providing wide color gamut through NTSC coverage). This combination allows the display device to simultaneously achieve both high color purity and effective wide color gamut display by integrating the strengths of both elements
Solution Approach 2:
The display device uses a composite structure combining the light-emitting element's narrow-spectrum light source with the liquid crystal element's color filter system. This composite approach enables the device to achieve both high color purity from the narrow spectra and wide color gamut through the integrated optical modulation system
3Adaptability or versatility
If a combination of light-emitting element and liquid crystal element is used, then wide color gamut and reduced contrast are achieved, but device complexity increases
Solution Approach 1:
The patent merges the light-emitting element and liquid crystal element into an integrated display device structure, where the light-emitting element and liquid crystal element are positioned in close proximity with optical coupling. This merging achieves wide color gamut and reduced contrast while minimizing the increase in device complexity through efficient spatial integration
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 combination enables the display of eye-friendly images with wide color gamut and high visibility, reducing viewer fatigue while maintaining high color purity and contrast.
Implementation Method 1
a liquid crystal element including a liquid crystal material is interposed between a pair of electrodes facing each other with alignment films provided between the liquid crystal element and the electrodes, and the liquid crystal display device displays images by utilizing the optical modulation action of the liquid crystal
Implementation Method 2
A light-emitting device includes a light-emitting element in which an EL layer is interposed between a pair of electrodes, and displays images by utilizing light emission obtained from the light-emitting element when voltage is applied between the pair of electrodes
Implementation Method 3
a light-emitting element with an EL layer between reflective and semi-transmissive electrodes
Data Source
AI summary
A display device capable of displaying images with wide color gamut is provided. A display device capable of displaying images with wide color gamut and capable of relaxing contrast made by narrow spectra is provided. The display device includes a liquid crystal element and a light-emitting element. Light obtained from the liquid crystal element through a color filter has an NTSC area ratio of more than or equal to 20 percent and less than or equal to 60 percent and light emitted by the light-emitting element has a BT.2020 area ratio of more than or equal to 80 percent and less than or equal to 100 percent.