Spatial Light Modulator Pixel Splitting for Holographic Viewing Window
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Solution Overview
Problem
Existing holographic display technologies face limitations in viewing angle and image quality due to the restricted binocular parallax and potential eye fatigue caused by discrepancies between perceived depth and focal point.
Innovation Solution
A spatial light modulator with split pixels using additional black masks is proposed, allowing for an expanded viewing window by reducing pixel pitch without increasing resolution, thereby enhancing image quality and viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If pixel pitch is decreased to increase viewing window size, then viewing angle is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing each pixel into multiple sub-pixels using black masks. This allows the viewing window to be effectively increased by creating multiple display regions within the original pixel area, thereby improving viewing angle without requiring a complete redesign of the entire display structure.
Solution Approach 2:
The patent implements local quality by selectively applying black masks to specific regions of pixels to create different sub-pixel types (e.g., first sub-pixel, second sub-pixel). Each sub-pixel can have different optical properties or functions, allowing localized optimization of the display characteristics while maintaining overall pixel integrity.
2Adaptability or versatility
If additional black masks are added to split pixels, then viewing angle expands, but manufacturing process complexity increases
Solution Approach 1:
The manufacturing process is segmented into sequential steps where black masks are added in a controlled manner to divide pixels into sub-pixels. This step-by-step approach allows for manageable manufacturing complexity while achieving the desired viewing angle expansion through systematic pixel division.
Solution Approach 2:
The patent resolves manufacturing complexity by transitioning from a two-dimensional pixel layout to a three-dimensional structure with multiple layers (including black masks at different levels). This dimensional approach allows viewing angle expansion without proportionally increasing manufacturing difficulty, as the additional complexity is distributed across vertical layers rather than horizontal expansion.
3Manufacturing precision
If pixel structure is modified with black masks, then image quality improves, but device complexity increases
Solution Approach 1:
The patent improves image quality by applying local quality enhancement through black masks that create distinct sub-pixel regions. Each sub-pixel can be optimized for specific optical functions, improving overall image quality and reducing crosstalk while maintaining a relatively simple overall device structure through localized modifications.
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 increases the viewing window size, allowing for a wider range of viewing angles while maintaining image quality, and prevents crosstalk between hologram images, thus providing improved holographic display experiences.
Implementation Method 1
when reference light is emitted onto a hologram pattern having recorded thereon an interference pattern obtained by interference between object light reflected from an original object and the reference light, the reference light is diffracted and an image of the original object is reproduced
Implementation Method 2
It is proposed to split a pixel by adding black masks to the pixel structure
Data Source
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AI summary
A spatial light modulator (120) providing an expanded viewing window and a holographic display apparatus including the spatial light modulator are provided. The spatial light modulator includes a mask member (128) having a periodic pattern that is arranged to split an area of each of a plurality of pixels optionally associated with a black matrix (127) into at least two portions such that a space between lattice spots (LS) formed by a period structure of the spatial light modulator increases.