Display Partition and Diffraction Structures for Color Uniformity
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Solution Overview
Problem
Transparent display devices experience color unevenness near the light source due to the entry of multiple colored lights into a light guide section, leading to discomfort in viewing the background and image superimposition.
Innovation Solution
A display device configuration that includes a light source section emitting multiple colors, a light guide section, a liquid crystal layer, a partition section with structures arranged at specific intervals, and a diffraction section to manage light diffraction, ensuring uniform light distribution and reducing color unevenness by aligning the diffraction and partition structures' pitches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple colored lights are made to enter a light guide section from a light source section, then the display can show multiple colors, but color unevenness appears in parts of the display region close to the light source section
Solution Approach 1:
The light guide section is divided into multiple regions with different diffraction structures. Specifically, a first diffraction section with a first pitch and a second diffraction section with a second pitch are used to differentially distribute different colored lights, ensuring uniform color distribution across the display region by segmenting the light guidance path according to wavelength requirements
Solution Approach 2:
Different regions of the light guide section are assigned different diffraction pitches tailored to specific color requirements. The first diffraction section uses a first pitch optimized for certain wavelengths while the second diffraction section uses a second pitch for other wavelengths, creating local optimization of light distribution properties in different spatial zones
2Illumination intensity
If a diffraction section is added to manage light diffraction, then color unevenness is reduced, but the device structure becomes more complex
Solution Approach 1:
The diffraction sections are integrated directly into the light guide section structure, merging the light guiding function with the diffraction function. This combination eliminates the need for separate diffraction elements and reduces overall structural complexity while maintaining the color uniformity improvement
Solution Approach 2:
The light guide section is designed to perform multiple functions simultaneously: it guides light from the source and also acts as a diffraction element through its structured regions. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity
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 effectively improves the display performance by minimizing color unevenness and maintaining consistent visible light transmittance across the display region and peripheral areas, enhancing the visual recognition of both the image and background without discomfort.
Implementation Method 1
a diffraction section configured to diffract the plurality of lights that have entered the light guide section from the light source section
Implementation Method 2
a liquid crystal layer which the light that has passed through the light guide section enters
Data Source
AI summary
A display panel includes a light source section, a light guide section, a liquid crystal layer, a partition section, a display section, and a diffraction section. The light source section emits plural lights of different colors. The light emitted from the light source section enters the light guide section. The light that has passed through the light guide section enters the liquid crystal layer. The partition section partitions the liquid crystal layer into plural pixel regions. The partition section includes plural scanning lines and plural black matrices arranged at intervals in an intersecting direction that intersects with a thickness direction of the light guide section. An image formed by the light emitted from the plural pixel regions is displayed on the display section. The diffraction section diffracts the plural lights that have entered the light guide section from the light source section.