Curved Edge Display Luminance Correction via Optical Layers
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Solution Overview
Problem
Current electronic display technologies face challenges in creating a seamless, borderless display due to image distortion and luminance roll-off at the edges, particularly when using curved display matrices, which are exacerbated by the need for protective cover glasses and varying refractive angles.
Innovation Solution
The implementation of an electronic display system that includes a display matrix with a light-releasing surface, an image-correcting layer configured to transmit and reorient light from both flat and curved portions to form an apparent plane image, and a luminance-correcting layer that deflects light from the curved corners into the image-correcting layer, using refractive optics and prismatic structures to minimize distortion and ensure uniform luminance across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a curved display matrix is used to create a borderless display, then the display area and seamless appearance are improved, but image distortion and luminance roll-off at the edges worsen
Solution Approach 1:
The display system is segmented into distinct functional layers: the curved display matrix, the image-correcting layer, and the luminance-correcting layer. Each layer addresses specific issues - the image-correcting layer corrects geometric distortion while the luminance-correcting layer addresses brightness uniformity, allowing the curved design to achieve borderless display without sacrificing image quality
Solution Approach 2:
The image-correcting layer acts as an intermediary between the curved display matrix and the viewer, transforming the curved light paths into a planar image perception. This intermediary layer compensates for the inherent distortion of curved displays, enabling large display areas while maintaining manufacturing precision
2Strength
If a protective cover glass is added to protect the display, then the display durability is improved, but image distortion and luminance uniformity worsen due to varying refractive angles
Solution Approach 1:
The image-correcting layer serves as an intermediary optical element between the display matrix and the protective cover glass. It pre-corrects image distortion before light passes through the cover glass, compensating for the refractive effects that would otherwise degrade image quality
Solution Approach 2:
The system changes the refractive parameters by introducing the image-correcting layer with specific optical properties. This layer has varying thickness or refractive index designed to counteract the refraction introduced by the protective cover glass, maintaining image precision despite the added protective element
3Device complexity
If light from curved corners is directly transmitted without correction, then the device complexity is reduced, but luminance uniformity and image quality worsen
Solution Approach 1:
The luminance-correcting layer applies local quality correction by having different optical properties at different locations. It specifically targets the curved corner regions where luminance roll-off occurs, deflecting light from these areas to compensate for the inherent brightness loss, while leaving the flat face portion largely unaffected
Solution Approach 2:
The luminance-correcting layer changes the light deflection parameters dynamically across the display surface. By varying the deflection angle or efficiency in different regions (particularly at curved corners), it compensates for luminance non-uniformity without requiring a complete redesign of the entire optical system
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 eliminates image distortion and ensures uniform luminance and pixel spacing across the entire display, allowing for a seamless, borderless viewing experience by aligning the apparent plane image with the observer's field of view and optimizing light acceptance and deflection angles.
Implementation Method 1
the image-correcting layer is configured to transmit light released from the flat face portion of the display matrix and to reorient light released from the curved corner portion of the display matrix
Implementation Method 2
the luminance-correcting layer is configured to deflect the light released from the curved corner portion into an acceptance profile of the image-correcting layer
Data Source
AI summary
An electronic display comprises a display matrix, an image-correcting layer, and a luminance-correcting layer. The display matrix includes a flat face portion, a curved corner portion, a light-releasing surface, and a series of pixels extending across the flat face portion and around the curved corner portion. Coupled to the light-releasing surface of the display matrix, the image-correcting layer is configured to transmit light released from the flat face portion of the display matrix and to reorient light released from the curved corner portion of the display matrix such that the transmitted light and the reoriented light exit the image-correcting layer substantially in parallel, forming an apparent plane image of the series of pixels. Arranged between the light-releasing display surface and the image-correcting layer, the luminance-correcting layer is configured to deflect the light released from the curved corner portion into an acceptance profile of the image-correcting layer.