Optical Isolation Gasket for Display Sensor Crosstalk
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to reduce optical crosstalk in computing devices with integrated light sensors, such as cameras, while minimizing bezel size and maintaining image quality, as existing solutions struggle to effectively isolate light sensors from light sources within the display, leading to degraded performance and aesthetics.
Innovation Solution
An optical isolation system is introduced, featuring a gasket with an aperture that aligns with the light sensor, made of opaque material to block light from the display, reducing optical crosstalk and allowing for the integration of light sensors behind the display without compromising image quality or design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If light sensors are positioned behind the display to enable bezel-less design, then the bezel size is reduced, but optical crosstalk increases and sensor accuracy deteriorates
Solution Approach 1:
The display surface is segmented into multiple zones: a first zone adjacent to the light sensor, a second zone for light emission, and an optical disrupting region between them. This segmentation isolates the light sensor from direct light exposure while maintaining display functionality in other areas.
Solution Approach 2:
An optical disrupting region acts as an intermediary between the light source and light sensor. This region, coated with opaque material, blocks and disrupts light paths that would otherwise cause crosstalk, while allowing the display to function normally in non-disrupting areas.
2Object-affected harmful factors
If opaque material is applied to block light from reaching the sensor, then optical crosstalk is reduced, but display area and light transmission are compromised
Solution Approach 1:
The opaque coating is applied locally only to the optical disrupting region, not across the entire display. This localized application blocks light where necessary to protect the sensor while preserving light transmission and display functionality in the first and second zones.
Solution Approach 2:
The display is divided into functional zones with different optical properties: the first zone allows light transmission for sensor operation, the second zone emits light for display, and the optical disrupting region blocks light to prevent crosstalk. This segmentation minimizes the impact on overall display area.
3Object-affected harmful factors
If the aperture area is increased to match the sensor area, then light blocking effectiveness is improved, but more light paths are blocked reducing display functionality
Solution Approach 1:
The optical disrupting region with opaque coating is confined to specific areas where light blocking is necessary. The aperture in the gasket is sized to match the sensor's light receiving portion, blocking only the minimal light paths that would cause crosstalk while preserving display functionality in surrounding areas.
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 effectively minimizes optical crosstalk, maintains sensor accuracy and image quality, and enables a bezel-less design by shielding light sensors from display light sources, enhancing both performance and aesthetics.
Implementation Method 1
the gasket includes a material that is opaque to wavelengths emitted by the light source
Implementation Method 2
the lower surface includes an optical disrupting region that extends around the first zone, the optical disrupting region being coated with a material that is opaque to wavelengths emitted by the light source
Data Source
AI summary
An optical isolation system is disclosed for use in a display to reduce light that is transmitted from one or more light sources to a camera. The system can include a gasket arranged next to the camera, where the gasket includes an aperture that substantially surrounds a region that is adjacent to a lens of the camera. In some cases, the gasket can reduce optical crosstalk associated with visible light as well as infrared light. The gasket can include a material that is optical opaque to the wavelengths of the light being transmitted. In addition, some layers of the display can include optical disrupting regions formed in a thickness of the layer.