Inactive Area Optical Structures for Display Uniformity
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Solution Overview
Problem
It is challenging to incorporate light-based devices such as light sensors and cameras into electronic devices under inactive regions of displays without disturbing the appearance of the display.
Innovation Solution
The implementation of an inactive area with structures optically matched to the active pixels, including textured layers, ink with embedded particles, and physical vapor deposition layers, which form optical windows to align with light-based components, allowing them to receive light while maintaining a uniform appearance with the active area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light-based components are mounted under inactive regions of display, then device functionality is improved, but display appearance uniformity deteriorates
Solution Approach 1:
The patent applies local quality by implementing different structures in different regions of the inactive area. Specifically, the inactive area is divided into multiple regions with different optical characteristics - some regions have reflective structures while others have light-blocking structures, allowing each region to be optimized for its specific function while collectively maintaining overall appearance uniformity
Solution Approach 2:
The patent employs color changes by using inactive area structures with optical properties that match the surrounding active display regions. The reflective and light-blocking structures are designed to reflect or block light in a manner that creates visual uniformity with adjacent pixels, making the inactive areas imperceptible to users
2Shape
If inactive area structures are added to match optical appearance, then display appearance uniformity is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into the inactive area structures. These structures simultaneously serve as optical matching elements (to maintain appearance uniformity), mounting substrates for light-based components, and light management elements (reflective or light-blocking). This consolidation reduces overall device complexity despite adding functional capabilities
Solution Approach 2:
The inactive area structures are designed with multi-functionality, serving as both optical matching elements and component mounting platforms. The same structures that provide visual uniformity also provide mechanical support and light management functions, eliminating the need for separate dedicated components
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 integration of light-based components without altering the display's appearance, ensuring a uniform reflection and color match between active and inactive areas, thus enhancing the device's aesthetics and functionality.
Implementation Method 1
The inactive area structures may reflect light at a similar angle to light that reflects from the active area
Implementation Method 2
The inactive area structures may include textured layer(s), ink with embedded particles, portions of a polarizer layer, and/or a physical vapor deposition (PVD) layer
Data Source
AI summary
An electronic device may be provided with a display. The display may have a display cover layer. The display may have an active area with pixels and an inactive area adjacent to the active area. A reflective layer or a reflective portion of the cover layer may be formed in the inactive area and may have a reflectivity that matches a reflectivity of the active area of the display. The reflective portion may include texture or particles embedded in an ink layer. A PVD layer may be formed on the reflective layer and may have a color that matches a color of the active area. A polarizer layer may also extend across the active areas and inactive areas. In this way, an appearance of the inactive area may match an appearance of the active area when the display is off.