Flexible Display Organic-Layer Structure for Reflectance and Bending
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in reducing external light reflectance without using a polarizer, particularly in flexible substrates that are bent or folded, and require a reduced non-display area to accommodate optical elements like cameras and sensors.
Innovation Solution
A light emitting display device with a flexible substrate that includes a display area and a peripheral area with a bending area, where inorganic layers have openings filled with organic layers, and a black pixel defining layer is removed in the bending area, allowing for a reduced non-display area and improved monitoring and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizer is used to reduce external light reflectance, then reflectance is reduced, but device complexity and cost increase
Solution Approach 1:
The patent removes the polarizer from the display structure, extracting the problematic element that increased complexity while still achieving the goal of reducing external light reflectance through alternative means (organic layer configuration and black pixel defining layer design)
Solution Approach 2:
The patent changes the optical parameters of the display by adjusting the configuration and material properties of organic layers and black pixel defining layers, thereby altering light reflectance characteristics without introducing additional optical elements like polarizers
2Area of stationary object
If the non-display area is reduced to accommodate optical elements, then device compactness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the display area and peripheral area with clearly defined boundaries, allowing the non-display area to be minimized while maintaining adequate space for optical elements. The black pixel defining layer is strategically positioned to facilitate this segmentation without compromising manufacturing feasibility
3Manufacturing precision
If the black pixel defining layer is removed from peripheral areas for monitoring and alignment, then manufacturing precision is improved, but display uniformity may be affected
Solution Approach 1:
The patent applies the black pixel defining layer selectively - present in the display area for uniformity but removed from peripheral areas to enable monitoring and alignment. This local differentiation allows each region to have the specific properties needed for its function without compromising overall performance
Data Source
AI summary
A light emitting display device includes: a flexible substrate including a display area and a peripheral area having a bending area. The display area includes: a plurality of inorganic layers; first and second organic layers that are disposed on the plurality of inorganic layers; a black pixel defining layer that is disposed on the second organic layer; and a spacer that is disposed on the black pixel defining layer. In the bending area, the plurality of inorganic layers include a first opening formed at a position corresponding to the bending area. The first opening is filled with the first organic layer, the second organic layer is disposed on the first organic layer, the black pixel defining layer includes a second opening at a position corresponding to the bending area, and the second opening is filled with an organic layer for the spacer, formed of a same material as the spacer.