3D Display Light Directing Component Focal Alignment
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Solution Overview
Problem
Conventional 3D image display technologies cause discomfort due to unequal binocular vision convergence distance and monocular focal distance, leading to dizzy and uncomfortable viewing experiences.
Innovation Solution
A display device comprising a backlight module and a light directing component that emits collimated light in multiple directions, converging light to specific viewpoints to align with both eyes' focal distances, ensuring consistent vision convergence and monocular focal alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional 3D image display technology is used, then 3D image display is achieved, but binocular vision convergence distance does not match monocular focal distance causing discomfort
Solution Approach 1:
The patent divides the display system into multiple light directing components, each responsible for directing light to specific viewpoints. By segmenting the light paths and using multiple independent light directing components, the system can precisely control the focal distance for each eye separately, achieving alignment between binocular convergence distance and monocular focal distance.
Solution Approach 2:
The patent implements different optical properties at different locations by using multiple light directing components with different focal lengths. Each light directing component is optimized for its specific location and function, allowing precise control over the focal distance for left and right eyes independently, thereby resolving the focal distance mismatch issue.
2Ease of operation
If multiple light directing components are used to align focal distances, then viewing comfort is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple light directing components into a single integrated optical system where the components work together in sequence. The first light directing component directs light to intermediate viewpoints, and the second light directing component further directs the light to final viewpoints on the display screen. This merging approach achieves the function of multiple components while reducing overall system complexity.
Solution Approach 2:
The patent introduces intermediate viewpoints as a mediator between the light source and the final display screen. The first light directing component creates intermediate images at specific viewpoints, which then serve as the object for the second light directing component. This intermediary approach allows complex focal distance adjustments to be broken down into simpler sequential steps.
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 provides a comfortable 3D viewing experience by aligning the focal distances of both eyes, eliminating the discomfort associated with parallax 3D technology and enabling effective monocular and binocular 3D displays.
Implementation Method 1
a waveguide layer, a grating structure disposed on an upper surface of the waveguide layer
Implementation Method 2
a grating structure disposed on an upper surface of the waveguide layer
Implementation Method 3
the upper dielectric layer and the lower dielectric layer have a refractive index less than that of the waveguide layer
Implementation Method 4
the light directing component is configured to converge incident collimated light in a same direction to a same preset viewpoint and converge incident collimated light in different directions to different preset viewpoints
Data Source
AI summary
A display device is provided, and the display device includes a backlight module, a display module and a light directing component which are sequentially arranged. The backlight module is configured to periodically and sequentially emit collimated light in S different directions; the collimated light in different directions runs through the display module and arrives at the light directing component, in which S≥2; and the light directing component is configured to converge incident collimated light in a same direction to a same preset viewpoint and converge incident collimated light in different directions to different preset viewpoints, in which the preset viewpoints at least include two preset viewpoints belonging to a same eyeball. An image display method applied to the display device is also provided.