Prism-Coupled Display Optics for Notch-Free 3D Sensing
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Solution Overview
Problem
Conventional placement of optical transmitters and receivers in computing devices reduces the usable area of display screens by requiring bevels or notches, increasing device size and reducing image presentation space.
Innovation Solution
Positioning optical transmitters and receivers behind the display screen, utilizing guides and couplers to route light through the display screen, minimizing interference with image output and allowing for a more expansive display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical transmitters and receivers are placed in a separate area (bevel or notch) of the display screen, then the optical device can function properly for facial recognition and 3D sensing, but the usable area of the display screen is reduced and the overall device size increases
Solution Approach 1:
The patent merges the optical device components (transmitters and receivers) with the display screen by positioning them behind the display screen rather than in separate bevels or notches. This integration allows the optical components to share the same space as the display, eliminating the need for additional notches and maximizing the usable display area while maintaining full optical functionality for facial recognition and 3D sensing.
Solution Approach 2:
The patent transitions the placement of optical components from a two-dimensional surface arrangement (in-plane placement in bevels or notches) to a three-dimensional arrangement (positioning components behind the display screen). This dimensional change allows the optical components to be integrated into the device structure without occupying additional display area, effectively resolving the conflict between optical functionality and display area.
2Reliability
If optical transmitters and receivers are placed in a separate area (bevel or notch) of the display screen, then the optical device can function properly, but the overall size of the computing device increases
Solution Approach 1:
The patent merges the optical device components (transmitters and receivers) with the display screen by positioning them behind the display screen rather than in separate bevels or notches. This integration allows the optical components to share the same space as the display, eliminating the need for additional notches and maximizing the usable display area while maintaining full optical functionality for facial recognition and 3D sensing.
Solution Approach 2:
The patent transitions the placement of optical components from a two-dimensional surface arrangement (in-plane placement in bevels or notches) to a three-dimensional arrangement (positioning components behind the display screen). This dimensional change allows the optical components to be integrated into the device structure without occupying additional display area, effectively resolving the conflict between optical functionality and display area.
3Area of stationary object
If optical transmitters and receivers are placed behind the display screen, then the usable display area is increased and bevels or notches are reduced or eliminated, but light must be routed through the display screen which may interfere with image output
Solution Approach 1:
The patent segments the display screen into different functional regions: a first region that allows light transmission for optical sensing and a second region that blocks light to prevent interference with image output. This segmentation enables the optical components positioned behind the display to transmit light through specific areas for facial recognition and 3D sensing while blocking light in other areas to maintain image quality, thus resolving the conflict between optical functionality and display performance.
Solution Approach 2:
The patent applies different optical properties to different regions of the display screen. The first region is designed with light-transmissive properties to allow optical signals to pass through for sensing operations, while the second region is designed with light-blocking properties to prevent interference with the displayed image. This local differentiation of optical characteristics enables both optical functionality and image quality to coexist without mutual interference.
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
Enhances the usable display area by eliminating or reducing bevels and notches, improving 3D sensing resolution, and maintaining image quality without interference from optical components.
Implementation Method 1
the guide may include a first portion and a second portion. The first portion may be configured to receive light from the transmitter and route the light to a coupling region at a sidewall of the display screen layer. The second portion may be configured to receive light from the coupling region and route the light to the receiver
Data Source
AI summary
A display system includes a display screen, an upper guide, a lower guide, a prism, and a receiver. The display screen presents visual output via a display screen front surface. The upper guide extends along at least a portion of the display screen front surface. The lower guide extends along at least a portion of a display screen back surface. The prism is coupled to an upper guide sidewall and a lower guide sidewall and direct beams between the upper guide and the lower guide via the upper guide sidewall and the lower guide sidewall. The receiver is positioned below a lower guide back surface and receives the beam from the lower guide back surface.