Dynamic Grating 3D Display Eye Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 3D display technologies using parallax barriers are limited by fixed positions of bright and dark stripes, which restrict the 3D image effect to a specific user eye position range, making them inconvenient for daily applications.
Innovation Solution
A 3D display apparatus with a dynamic grating that uses a camera to track human-eye position information and a control unit to adjust the positions of bright and dark stripes, comprising a first substrate, an electrolyte layer, an electrochromic layer, and a second substrate, where the control unit controls the voltage applied to electrochromic sheets to change their transparency and opacity, allowing adaptive positioning of stripes based on user eye positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed grating structure is used in parallax barrier technology, then the 3D image effect can be achieved within a specific viewing range, but the positions of bright and dark stripes become uncontrollable and the user experience deteriorates when eyes are outside this range
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed grating structure into a dynamic one. The grating's bright and dark stripe positions are made adjustable through voltage control of electrochromic sheets, allowing the system to adapt to different viewing positions while maintaining reliable 3D image effects.
Solution Approach 2:
The patent implements parameter changes by controlling the transparency of electrochromic sheets through voltage application. By changing the optical parameters (transparency/opacity) of the grating elements, the system can dynamically reposition bright and dark stripes to accommodate various eye positions, resolving the contradiction between reliability and adaptability.
2Ease of manufacture
If the grating stripe positions are fixed after fabrication, then the manufacturing process is simplified, but the device cannot adapt to different user observing positions
Solution Approach 1:
The patent maintains ease of manufacture by using a standard grating fabrication process, then adds operational flexibility through electrochromic materials that can be controlled after manufacturing. This separates the manufacturing simplicity from operational adaptability, resolving the contradiction between ease of manufacture and ease of operation.
Solution Approach 2:
The electrochromic sheets serve as an intermediary between the fixed grating structure and the user's viewing position. This intermediary layer can dynamically adjust its optical properties to enable adaptation to different observing positions without requiring complex manufacturing changes.
3Adaptability or versatility
If electrochromic sheets are used to control stripe positions dynamically, then adaptability to different eye positions is improved, but the device complexity increases
Solution Approach 1:
The patent manages device complexity by controlling the optical parameters of existing grating elements through voltage application to electrochromic sheets. This approach achieves viewing position adaptability by changing material properties rather than adding complex mechanical moving parts, thereby limiting the increase in 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
Enables a 3D image effect for naked eyes at various observing positions by dynamically adjusting the grating's bright and dark stripes, providing a wider view angle and improved usability compared to prior art.
Implementation Method 1
the electrochromic sheets not applied with the voltage is colored by ions from the electrolyte layer to present dark stripes that are opaque while the electrochromic sheets applied with the voltage is decolored by ions from the electrolyte layer to present bright stripes that are light transmissive
Implementation Method 2
the electrochromic sheets not applied with the voltage is colored by ions from the electrolyte layer to present dark stripes that are opaque while the electrochromic sheets applied with the voltage is decolored by ions from the electrolyte layer
Data Source
AI summary
A 3D display apparatus is provided, which comprises: a display, a camera configured to track human-eye position information of human eyes, and a processor electrically connected with the camera and configured to generate a control signal according to the human-eye position information. Preferably, the display comprises a dynamic grating, which is electrically connected with the processor and configured to, according to the control signal, control bright and dark stripes of the dynamic grating to change in position adaptively according to positions of human eyes. Thereby, the 3D display apparatus of the present disclosure utilizes the camera to track human-eye position information and then utilizes the control unit to change positions of bright and dark stripes of the grating according to the human-eye position information so as to adapt to different observing positions of the user's two eyes, thus achieving a 3D image effect.