Light Blocking Pattern on Lower Cover Layer for Display Privacy
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Solution Overview
Problem
Display devices face challenges in providing effective light blocking patterns to prevent leakage of visual information, especially when viewed from the side, which compromises privacy and image visibility.
Innovation Solution
A display device design featuring a light blocking pattern on a lower cover layer that overlaps non-light-emitting areas, with varying width and concave shape, and an input sensor system with sensing electrodes and insulating layers, utilizing organic materials for cover layers to manage light emission and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a light blocking pattern is added to prevent leakage of visual information, then privacy and image visibility are improved, but device structure complexity increases
Solution Approach 1:
The light blocking pattern is integrated within the existing display panel structure by forming it on the lower cover layer that is already part of the display device. The pattern is nested between the display panel and the upper cover layer, utilizing the existing layered structure rather than adding external components.
Solution Approach 2:
The light blocking pattern extends in the thickness direction of the display panel with varying width, creating a three-dimensional structure that blocks light from side viewing angles. This dimensional approach blocks leakage without requiring additional lateral components.
2Loss of information
If the light blocking pattern has varying width along thickness direction, then light blocking effectiveness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The width of the light blocking pattern in the thickness direction is varied to optimize light blocking effectiveness. The pattern has a first width at a first position and a second width at a second position, allowing adjustment of blocking performance for different viewing angles while maintaining manufacturability.
3Loss of energy
If the light blocking pattern is disposed on the lower cover layer, then light management efficiency is improved, but the number of layers increases
Solution Approach 1:
The lower cover layer serves multiple functions: it provides structural support as part of the display panel assembly and simultaneously carries the light blocking pattern for light management. This multi-functionality allows efficient light control without requiring separate dedicated layers.
Data Source
AI summary
A display device includes first and second areas. The second area includes a display panel including a plurality of light emitting areas respectively overlapping element areas and a non-light-emitting area at least partially surrounding the light emitting areas such that at least a portion of the non-light-emitting area overlaps a peripheral area. A lower cover layer is disposed on the display panel, overlapping the first area and the second area, and including cover patterns respectively overlapping the light emitting areas of the second area. A light blocking pattern is disposed on the lower cover layer overlapping the second area. The light blocking pattern covers a portion of an upper surface of each of the cover patterns.