Ametropia-Corrective Display Optics for Per-Eye Virtual Image Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display screens cannot compensate for ametropia, requiring users to wear corrective devices like glasses or contact lenses to see clear digital content, and they cannot accommodate different ametropic conditions in each eye of a user.
Innovation Solution
An image projection system that adjusts virtual image distances for each eye based on ametropia diagnostic information, using separate picture generation units and ametropia-corrective lenses to project sharp images without additional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If display screens are used to present digital content, then information delivery is achieved, but users with ametropia cannot see clear images without corrective devices
Solution Approach 1:
The patent implements dynamic adjustment of optical parameters by controlling the liquid crystal lens to vary its focal length in real-time based on the user'sametropic condition, enabling the display to adapt and maintain clear images for users with different refractive errors
Solution Approach 2:
The system changes the optical parameters of the light path by introducing a liquid crystal lens that can modify its refractive index and focal length through electrical control, thereby adjusting the virtual image distance to compensate for ametropia and enable clear viewing without corrective devices
2Device complexity
If traditional display screens are used, then device simplicity is maintained, but separate corrective devices are required for each eye
Solution Approach 1:
The patent combines the corrective lens function directly into the display device by integrating a liquid crystal lens at the light path, merging two previously separate functions (display and correction) into a single unified system, thereby eliminating the need for external corrective devices while maintaining operational simplicity
Solution Approach 2:
The display device is enhanced to perform multiple functions simultaneously: it acts as both an information display and an ametropia correction device, with the liquid crystal lens providing adjustable optical correction for different users and conditions, making the system universally applicable to various refractive errors
3Stability of the object's composition
If fixed virtual image distance is used, then optical system stability is maintained, but individual ametropic conditions cannot be compensated
Solution Approach 1:
The system transitions from a fixed to a dynamic optical configuration by implementing electrically controllable liquid crystal lenses that can adjust their focal length on-demand, allowing the virtual image distance to be precisely tuned to match each user's specific ametropic condition while maintaining system stability through controlled actuation
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 clear digital content viewing without corrective devices by compensating for individual ametropic conditions in each eye, providing stereoscopic images with depth perception.
Implementation Method 1
a liquid crystal (LC) panel arranged over the output area of the waveguide substrate, wherein the LC panel is configured to selectively permit a first light beam replica of the plurality of first light beam replicas to pass to a first eyebox of the first eye, and selectively block at least one remaining first light beam replica
Implementation Method 2
a waveguide substrate comprising: an input area configured to couple the first light beam and the second light beam into the waveguide substrate, and an output area configured to couple out a plurality of first light beam replicas of the first light beam from the waveguide substrate
Implementation Method 3
a first ametropia-corrective lens having a first configuration arranged on the first combined transmission path, wherein the first configuration corresponds to the first virtual distance, wherein the first ametropia-corrective lens is configured to receive the first combined light beam and transmit the first combined light beam further along on the first combined transmission path such that the first combined light beam renders a first image perceived at the first image projection plane
Data Source
AI summary
An image projection system includes a picture generation unit and a controller. The picture generation unit includes a plurality of monochromatic transmitters configured to transmit light beams corresponding to an image projection plane located at a virtual distance; combining optics configured to combine the light beams into a combined light beam and couple the combined light beam into a combined transmission path; and an ametropia-corrective lens having a configuration corresponding to the virtual distance. The ametropia-corrective lens is configured to receive the combined light beam and transmit the combined light beam further along on the combined transmission path such that the combined light beam renders an image perceived at the image projection plane. The controller is configured to receive ametropia diagnostic information corresponding to an ametropia of an eye, and adjust the configuration of the ametropia-corrective lens in order to adjust the virtual distance of the image projection plane.