Backlight Module Segmentation for Holographic Display Stability
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Solution Overview
Problem
Current three-dimensional display technologies face issues with poor viewing effects and unstable power due to the use of a single reconstruction light source for multiple sub-spatial light modulators, leading to suboptimal holographic image quality.
Innovation Solution
A backlight module and spatial light modulator configuration featuring a light source, optical conversion element, and light switch layer, where the optical conversion element converts light into coherent collimated light and the light switch layer independently controls the light emission of sub-optical conversion regions and sub-light switches, ensuring each sub-spatial light modulator receives appropriate light incidence for stable image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reconstruction light source is used for multiple sub-spatial light modulators, then device complexity is reduced, but holographic image quality and display stability deteriorate
Solution Approach 1:
The single light source is segmented into multiple independent sub-light sources, with each sub-light source corresponding to a specific sub-spatial light modulator. This segmentation allows independent control of light incidence for each modulator, eliminating interference between multiple modulators sharing a common light source and thereby improving holographic image quality and display stability.
2Ease of manufacture
If a single reconstruction light source is used for multiple sub-spatial light modulators, then manufacturing cost is reduced, but power stability deteriorates
Solution Approach 1:
The power supply system is segmented into multiple independent channels, with each sub-light source having its own dedicated power supply. This independent power supply configuration ensures stable power delivery to each sub-spatial light modulator without interference from other modulators, thereby improving overall power stability while remaining cost-effective.
3Device complexity
If light incidence is shared among multiple sub-spatial light modulators, then device structure is simplified, but viewing effect deteriorates
Solution Approach 1:
The optical path is segmented into multiple independent channels, with each sub-light source providing dedicated illumination to its corresponding sub-spatial light modulator. This segmentation eliminates light interference between modulators, ensuring optimal viewing effects while maintaining a relatively simple overall device 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 configuration enhances holographic image quality by avoiding the poor viewing effects associated with shared light sources and unstable power, allowing for independent control of light incidence to each sub-spatial light modulator, resulting in improved display stability and image fidelity.
Implementation Method 1
an optical conversion element arranged to face the light source and configured to convert a light beam emitted by the light source into coherent collimated light
Implementation Method 2
an optical film layer disposed between the first electrode and the second electrode and configured to be in an opaque state or in a transparent state under an action of an electric field between the first electrode and the second electrode
Implementation Method 3
the optical film layer comprises at least one of a liquid crystal layer and an electrochromic layer
Implementation Method 4
the optical film layer comprises at least one of a liquid crystal layer and an electrochromic layer
Data Source
AI summary
A backlight module, a spatial light modulator, a holographic display device and a holographic display method therefor are disclosed. The backlight module includes: a light source; an optical conversion element arranged to face the light source and configured to convert a light beam emitted by the light source into coherent collimated light; and a light switch layer disposed at a side of the optical conversion element away from the light source. The optical conversion element includes a plurality of sub-optical conversion regions. The light switch layer includes a plurality of sub-light switches, the plurality of sub-light switches and the plurality of sub-optical conversion regions being disposed in one-to-one correspondence.