Light Emitting Display Protection Layer Flow Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing light emitting display apparatus faces challenges in controlling the flow of the protection layer, leading to reduced touch sensitivity and display quality due to the overflow of the protection layer into the driving circuit area and the formation of steep inclinations and steps in the outer peripheral area, which affects the thickness and application of the protection layer.
Innovation Solution
A light emitting display apparatus is designed with a first pattern on the planarization layer and a second pattern in the non-active area to control the flow of the protection layer, minimizing its overflow into the driving circuit area and improving the thickness and uniformity of the protection layer, thereby enhancing touch sensitivity and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the protection layer is applied without flow control structures, then the application process is simple, but the protection layer overflows into the driving circuit area causing reduced touch sensitivity
Solution Approach 1:
The patent divides the non-active area into distinct regions by introducing first and second patterns that segment the protection layer flow path. The first pattern is disposed in the non-active area adjacent to the active area, and the second pattern is disposed in another region of the non-active area, creating controlled flow channels that prevent overflow into the driving circuit area while maintaining application simplicity
Solution Approach 2:
The first and second patterns act as intermediary structures between the protection layer and the driving circuit area. These patterns serve as flow control barriers that mediate the protection layer's spread, preventing direct contact with the driving circuit while allowing the protection layer to be applied uniformly across the display area
2Manufacturing precision
If the protection layer flows freely in the non-active area, then the application process is simple, but steep inclinations and steps are formed affecting layer thickness uniformity
Solution Approach 1:
The first and second patterns segment the non-active area into controlled regions, creating defined flow paths for the protection layer. This segmentation prevents uncontrolled flow that would create steep inclinations and steps, ensuring uniform thickness across the protection layer while maintaining a relatively simple application process
Solution Approach 2:
The patterns are strategically positioned in specific regions of the non-active area to locally control the protection layer flow. The first pattern is disposed in the non-active area adjacent to the active area, while the second pattern is disposed in another region, creating localized flow control zones that maintain overall thickness uniformity
3Reliability
If a larger design margin is provided for the protection layer, then the protection layer overflow is prevented, but the device size increases and touch sensitivity in outer peripheral area is reduced
Solution Approach 1:
Instead of providing a uniform large design margin across the entire device, the patent segments the flow control function into specific first and second patterns positioned in the non-active area. This allows the protection layer to be contained within a smaller effective area, preventing overflow without increasing the overall device size, thereby maintaining outer peripheral touch sensitivity
4Area of stationary object
If the protection layer thickness is reduced in the outer peripheral area, then the device can be made smaller, but electric field interference increases reducing display quality
Solution Approach 1:
The first and second patterns create segmented flow control regions that allow the protection layer to maintain adequate thickness in the outer peripheral areas where touch sensitivity and display quality are critical. The patterns are positioned to control flow without forcing uniform thinning across the entire device, thus preventing electric field interference while still enabling compact device design
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided is a light emitting display apparatus. The light emitting display apparatus includes a substrate including an active area and a non-active area adjacent to the active area; a planarization layer in the active area and a first part of the non-active area; a bank layer, a light emitting diode layer, and a first pattern on the planarization layer; a protection layer on the bank layer, the light emitting diode layer, and the first pattern; and a second pattern disposed in a second part adjacent to the first part of the non-active area.