Organic Insulating Layer Stepped Structure for Display Peripheral Area
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Solution Overview
Problem
In display apparatuses, the reduction of the peripheral area for component placement due to increased display area leads to space constraints for essential components, affecting the efficiency and reliability of the device.
Innovation Solution
The implementation of a display apparatus design that includes a dam part on the substrate in the peripheral area to surround the display area, an encapsulation layer covering the dam part, an organic insulating layer extending to the peripheral area, and a metal pattern overlapping the dam part, which helps in reducing the dead space and optimizing component placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display area is increased to improve the display proportion, then the display area ratio is improved, but the peripheral area for component placement is reduced
Solution Approach 1:
The invention utilizes the vertical dimension by forming an organic insulating layer with varying thickness that extends upward from the substrate. The organic insulating layer has a first thickness in the display area and a second thickness (greater than the first) in the peripheral area, creating a stepped structure that allows component placement in the peripheral area without reducing the display area proportion.
Solution Approach 2:
The organic insulating layer is segmented into different thickness regions: a first region with thickness of 0.7 μm or more in the display area, and a second region with thickness of 1.4 μm or more in the peripheral area. This segmentation allows the structure to serve dual purposes - maintaining display quality in the display area while providing adequate space for components in the peripheral area.
2Productivity
If the peripheral area is reduced to increase display area, then the display proportion is improved, but the space for essential components decreases
Solution Approach 1:
The invention resolves the space constraint by transitioning from a two-dimensional planar layout to a three-dimensional stepped structure. The organic insulating layer is formed with a first thickness in the display area and a second thickness (greater than the first) in the peripheral area, creating vertical space that accommodates essential components without compromising the display area proportion.
3Ease of manufacture
If the organic insulating layer thickness is increased in the peripheral area to accommodate components, then component placement is improved, but the manufacturing complexity increases
Solution Approach 1:
The invention changes the thickness parameter of the organic insulating layer based on location: 0.7 μm or more in the display area and 1.4 μm or more in the peripheral area. This parameter variation is achieved through a multi-step coating process where different thicknesses are deposited in different regions, allowing the structure to accommodate components while maintaining manufacturability through standardized coating techniques.
Data Source
AI summary
A display apparatus includes a display area in which a display element is arranged and a peripheral area adjacent to the display area, a dam part disposed on a substrate in the peripheral area to surround the display area, an encapsulation layer disposed on the substrate in the display area and the peripheral area to encapsulate the display element, an organic insulating layer disposed on the encapsulation layer and extending from the display area to the peripheral area to cover the dam part, and a metal pattern disposed on the organic insulating layer and overlapping the dam part in a plan view.