Hologram Display Pixel Layout for Chromatic Aberration Reduction
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Solution Overview
Problem
Hologram display devices suffer from chromatic aberration, leading to distorted hologram images due to differences in focal lengths caused by varying wavelengths of light.
Innovation Solution
The hologram display device is designed with a light modulation panel that arranges sub-pixels in a specific pattern, where the number and area of first and second sub-pixels vary with distance from the center, while third sub-pixels maintain a constant number and area, reducing focal length differences and chromatic aberration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional light modulation panel with uniform sub-pixel distribution is used, then the device structure is simple and easy to manufacture, but chromatic aberration occurs causing distorted hologram images
Solution Approach 1:
The patent applies local quality by varying the number and area of sub-pixels based on their position within the light modulation panel. Specifically, the panel is divided into multiple regions, and each region has a different sub-pixel configuration (different numbers of red, green, and blue sub-pixels per unit pixel) to compensate for position-dependent chromatic aberration. This local differentiation allows each region to be optimized for its specific location, reducing overall image distortion while maintaining manufacturability through systematic regional patterns.
2Manufacturing precision
If the number of sub-pixels varies across different regions of the light modulation panel, then chromatic aberration is reduced, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent segments the light modulation panel into multiple distinct regions, where each region has a specific sub-pixel configuration pattern. This segmentation allows the complex varying sub-pixel design to be broken down into manageable, repeatable units. Each region can be manufactured using standardized processes for that specific pattern, reducing overall manufacturing complexity compared to a completely non-uniform design.
Solution Approach 2:
The patent systematically changes the parameters of sub-pixel arrangement (number of red, green, and blue sub-pixels per unit pixel) across different regions of the panel. By establishing clear parameter variations based on positional coordinates, the design transforms a potentially chaotic manufacturing challenge into a systematic parameter-controlled process that can be implemented through programmed fabrication methods.
3Device complexity
If sub-pixels are evenly distributed across the light modulation panel, then the device structure is simple, but focal length differences cause image distortion
Solution Approach 1:
The patent implements local quality by creating position-dependent sub-pixel configurations throughout the light modulation panel. Different regions have specifically designed sub-pixel ratios and numbers to compensate for the focal length differences that occur at various positions. This local optimization ensures that each region contributes to minimizing chromatic aberration appropriate to its location, thereby improving overall hologram image quality while maintaining a systematic and manufacturable structure.
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 design minimizes chromatic aberration, resulting in clearer and less distorted hologram images by evenly distributing sub-pixels to balance focal lengths across the display.
Implementation Method 1
The hologram display devices are known as display device technology that uses the principle of reproducing an image of an original object when a reference light is irradiated and diffracted on the hologram pattern in which an interference pattern is recorded by interfering the object light reflected from the original object with the reference light.
Implementation Method 2
the hologram pattern in which an interference pattern is recorded by interfering the object light reflected from the original object with the reference light
Data Source
AI summary
Disclosed is a hologram display device, which includes a light source unit that provides source light, and a light modulation panel spaced apart from the light source unit and including unit pixels and forming a circular shape on a plane, and each of the unit pixels includes first sub-pixels, second sub-pixels, and third sub-pixels, and the number of first sub-pixels included in each of the unit pixels decreases with distance from a center of the light modulation panel moving toward an outer edge of the light modulation panel.