Apple inc. (20240264353). Display Devices Having Gratings With Gradient Edges simplified abstract
Contents
Display Devices Having Gratings With Gradient Edges
Organization Name
Inventor(s)
Brandon Born of Sunnyvale CA (US)
Display Devices Having Gratings With Gradient Edges - A simplified explanation of the abstract
This abstract first appeared for US patent application 20240264353 titled 'Display Devices Having Gratings With Gradient Edges
The abstract describes a display system that includes a waveguide and an optical coupler with surface relief gratings (SRGs) in a substrate on the waveguide. The SRGs have a central region and gradient lateral edges that separate the central region from a non-diffractive region of the substrate. The SRGs exhibit peak diffraction efficiency within the central region and gradient diffraction efficiency across the gradient lateral edges.
- The optical coupler includes one or more surface relief gratings (SRGs) in a substrate on the waveguide.
- The SRGs have a central region and gradient lateral edges that separate the central region from a non-diffractive region of the substrate.
- The SRGs exhibit peak diffraction efficiency within the central region and gradient diffraction efficiency across the gradient lateral edges.
- The gradient diffraction efficiency is achieved by varying the amplitude, phase, duty cycle, blaze angle, and/or thickness of a high or low index coating layered over the SRGs.
- This design prevents the couplers from being visible and minimizes perturbation of replicated pupils.
Potential Applications: - Augmented reality displays - Head-up displays in vehicles - Holographic displays
Problems Solved: - Minimizing visibility of optical couplers - Preventing perturbation of replicated pupils
Benefits: - Improved display quality - Enhanced user experience - Minimized visual distractions
Commercial Applications: Title: Advanced Optical Couplers for High-End Displays This technology can be used in high-end displays for consumer electronics, automotive HUDs, and AR/VR devices. The improved efficiency and reduced visibility of the optical couplers can enhance the performance and user experience of these products.
Questions about the technology: 1. How does the gradient diffraction efficiency of the SRGs improve display quality? 2. What are the specific advantages of using surface relief gratings in optical couplers?
Original Abstract Submitted
a display may include a waveguide and an optical coupler. the coupler may include one or more surface relief gratings (srgs) in a substrate on the waveguide. the srg(s) may have a central region and gradient lateral edges separating the central region from a non-diffractive region of the substrate. the srg(s) may exhibit peak diffraction efficiency within the central region and may exhibit gradient diffraction efficiency across the gradient lateral edges from the central region to the non-diffractive region. the gradient diffraction efficiency may be produced by varying, across the gradient lateral edges, the amplitude of the srg(s), the phase of the srg(s), the duty cycle of the srg(s), the blaze angle of the srg(s), and/or the thickness of a high or low index coating layered over the srg(s). this may serve to prevent the couplers from becoming undesirably visible and to minimize perturbation of replicated pupils.
