Optical Sensor Isolation Through Image Transport Layers in Displays
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Solution Overview
Problem
Existing electronic devices with displays face challenges in integrating displays and other components due to limited space, particularly in minimizing display borders and accommodating optical components.
Innovation Solution
The use of an image transport layer material, such as coherent fiber bundles or Anderson localization material, that overlaps optical components, allowing for the transportation of images while also enhancing optical component isolation by collimating light and restricting the angle of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If an image transport layer is added to minimize display borders and transport images, then display quality and space utilization are improved, but optical crosstalk between components increases
Solution Approach 1:
The patent introduces an optical isolation layer as an intermediary component positioned between the image transport layer and optical components. This layer acts as a mediator that blocks stray light and prevents optical crosstalk while allowing the image transport layer to continue minimizing display borders. The optical isolation layer specifically targets and blocks light in the wavelength range of optical components without interfering with the visible light transmission of the display.
Solution Approach 2:
The patent applies different optical properties to different regions of the device. The image transport layer has high transmission for visible light to minimize display borders, while the optical isolation layer has selective blocking properties for specific wavelength ranges to prevent crosstalk. This local differentiation of optical qualities allows each component to optimize its function without compromising others.
2Volume of moving object
If optical components are integrated into limited device volumes, then device compactness is improved, but optical isolation between components becomes difficult to maintain
Solution Approach 1:
The optical isolation layer serves as a mediator that enables close integration of optical components within limited device volumes. By positioning this layer between adjacent optical components, the patent blocks stray light and prevents optical interference, allowing components to be placed closer together without compromising optical isolation.
Solution Approach 2:
The patent addresses the volume constraint by adding a new dimensional layer (the optical isolation layer) between existing optical components. This dimensional approach allows optical isolation to be achieved without increasing the overall device footprint, effectively using the z-dimension to solve the problem of optical interference in a compact x-y plane layout.
3Device complexity
If light-emitting diodes are used for both display and camera flash functions, then device complexity is reduced, but optical crosstalk between display and camera increases
Solution Approach 1:
The patent implements multi-functionality by using the same light-emitting diode array to serve both display and camera flash functions. The display pixels can emit visible light for image display, while the same pixels can be activated to provide illumination for the camera. This universal use of components reduces device complexity while maintaining multiple functions.
Solution Approach 2:
The optical isolation layer acts as a mediator that prevents optical crosstalk between the display function and camera function of the shared light-emitting diodes. When the camera flash function is activated, the optical isolation layer blocks stray light from reaching the camera sensor, ensuring that only the intended illumination light is captured.
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
This solution enables the minimization of display borders, enhances optical isolation between components, and accommodates optical sensors within limited device volumes, improving the overall design and functionality of electronic devices.
Implementation Method 1
image transport layer material such as coherent fiber bundle material
Implementation Method 2
Anderson localization material
Implementation Method 3
enhancing optical component isolation by collimating light and restricting the angle of view
Data Source
AI summary
An electronic device may have image transport layer material such as coherent fiber bundle material or Anderson localization material. The image transport layer material may overlap optical components. Optical sensor components can emit and/or detect light passing through the image transport layer material. Optical components such as light-emitting diodes may emit light through image transport layers. An image from a display may pass through an image transport layer. Infrared light-emitting diodes, infrared photodetectors, and/or other optical sensor components may be used to form a two-dimensional optical touch sensor that is configured to gather touch input from an external object such as a finger of a user. The optical touch sensor may operate through an image transport layer.