Holographic Display Dispersion Compensation via Position-Dependent Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face reliability issues due to manufacturing variations, wavelength variations of light sources, and external factors, leading to luminance differences and discomfort in binocular vision.
Innovation Solution
A display device incorporating a first hologram that compensates for light dispersion and has varying diffraction efficiency based on wavelength and position, combined with a second hologram for each eye, along with light guide plates, intensity detectors, and spectral sensitivity detectors to adjust and stabilize light output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional display devices are used, then basic display function is achieved, but reliability is insufficient due to manufacturing variations, wavelength variations of light sources, and external factors
Solution Approach 1:
The first hologram is designed in advance with a specific intensity distribution pattern that anticipates and compensates for dispersion effects. This preliminary configuration allows the system to pre-correct for manufacturing variations and light source wavelength shifts before the light actually passes through the display system, thereby improving reliability without requiring real-time adjustment mechanisms.
Solution Approach 2:
The invention changes the intensity distribution parameter of the first hologram across its surface area. By varying the intensity distribution depending on position in the plane of the first hologram, the system can compensate for dispersion effects and maintain consistent display performance across different wavelengths and manufacturing tolerances, thus improving reliability.
2Reliability
If conventional display devices are used, then basic display function is achieved, but luminance differences cause discomfort in binocular vision
Solution Approach 1:
The first hologram is designed with different intensity distribution characteristics at different positions across its plane. This local variation in intensity distribution allows each region of the hologram to compensate for dispersion effects specific to its position, ensuring uniform luminance output across the entire display area and eliminating binocular vision discomfort.
3Reliability
If a first hologram with position-dependent diffraction efficiency is introduced, then dispersion compensation is achieved, but device complexity increases
Solution Approach 1:
The invention combines the dispersion compensation function with the existing holographic display elements by configuring the first hologram with a specific intensity distribution. This merging approach integrates the compensation mechanism into the existing display architecture rather than adding separate components, thereby achieving dispersion compensation while minimizing increases in overall 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
This configuration enhances the reliability of the display device by compensating for dispersion and luminance differences, reducing discomfort in binocular vision and improving overall performance across various factors.
Implementation Method 1
the first hologram compensates for dispersion of light emitted from the light source and diffracts and emits the light
Implementation Method 2
the light diffracted with compensated dispersion that has been emitted from the first hologram is introduced into the light guide plate, propagated through the light guide plate by total reflection
Data Source
AI summary
To provide a display device capable of further improving reliability of the display device with respect to manufacturing variations, wavelength variations of light sources, and active variations (variations due to external factors). There is provided a display device including at least a light source, a first hologram, and a second hologram, in which the first hologram compensates for dispersion of light emitted from the light source and diffracts and emits the light, the second hologram diffracts the light diffracted with compensated dispersion, and emits the light in a direction of a pupil of a user, and the first hologram has an intensity distribution of different diffraction efficiency with respect to a wavelength of the light emitted from the light source depending on a position in a plane of the first hologram.