Display Substrate Barrier Wall Notches Around Camera Hole
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Solution Overview
Problem
Display devices face challenges in achieving a full-screen and narrow-frame design due to the presence of camera apparatuses that require dedicated space, leading to issues with impurities entering the display area through the hole reserved for the camera, affecting the display effect.
Innovation Solution
A method for manufacturing a display substrate with a barrier wall surrounding the hole area, featuring a notch on its side surface, formed by etching an initial barrier wall covered by a protective layer, using metal layers with different etch rates to prevent impurities from reaching the functional layers, and integrating the camera within the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple electrode structure without light blocking structures is used, then the device complexity is reduced, but the manufacturing precision deteriorates due to electrode pattern misalignment
Solution Approach 1:
A light blocking structure is introduced as an intermediary element between the first and second electrodes. This light blocking structure serves as a reference marker during the coloring process, enabling precise alignment of the second electrode pattern relative to the first electrode pattern without increasing the complexity of the electrode structures themselves.
Solution Approach 2:
The light blocking structure is formed in advance before the second electrode is deposited. This preliminary formation of the light blocking structure provides a pre-established reference pattern that guides the subsequent electrode coloring process, ensuring precise alignment before the actual electrode formation occurs.
2Illumination intensity
If transparent electrodes are used to maintain display quality, then the illumination intensity is improved, but the harmful factors increase due to sodium ion migration causing image retention
Solution Approach 1:
Sodium ions are extracted or removed from the transparent electrode material to prevent their migration into the organic light emitting layer. By eliminating the harmful sodium ions from the electrode structure while maintaining the transparent electrode's optical properties, the image retention problem is solved without sacrificing display brightness.
Solution Approach 2:
A sodium barrier layer is introduced as a sacrificial or protective element that prevents sodium ion migration. This additional layer acts as a barrier that can be optimized independently, allowing the transparent electrode to maintain its optical properties while the barrier layer handles the harmful ion migration issue.
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
The method ensures effective protection of the display area from impurities, maintaining the display effect by preventing contamination of organic function and cathode layers, thus enhancing the display substrate's performance and enabling a full-screen design.
Implementation Method 1
an organic light emitting layer which emits light
Implementation Method 2
an electron transporting layer which transports electrons when a voltage is applied
Implementation Method 3
a hole transporting layer which transports holes when a voltage is applied
Data Source
Figure 1A~1B
Figure 2A
Figure 2B
AI summary
The present disclosure provides a display substrate, a method for manufacturing the same, and a display apparatus, and relates to the field of display technologies. The display substrate includes a display area, a barrier wall disposing area, and a hole area, the display area surrounds the barrier wall disposing area, the barrier wall disposing area surrounds the hole area, and the method for manufacturing the display substrate includes: after a first electrode of a light emitting device of the display substrate is formed, removing a protective layer of the barrier wall disposing area, and exposing at least one circle of an initial barrier wall covered by the protective layer, the initial barrier wall is disposed around the hole area; and etching the at least one circle of the initial barrier wall, to form at least one circle of a barrier wall, a notch is formed on at least one side surface of the barrier wall. Based on technical solutions of the present disclosure, a yield of the display substrate can be increased.