Display Device Cut Structure for Camera Opening
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Solution Overview
Problem
The challenge is to effectively integrate a camera within the active area of display devices without causing damage or degrading image quality, as existing methods of forming a camera hole using laser irradiation can lead to cracks and image quality deterioration.
Innovation Solution
A display device structure is proposed with a base layer having an active area and an adjacent inactive area, featuring an opening in the active area that includes a cut structure to disconnect the organic light emitting layer, and a camera is positioned corresponding to this opening. The cut structure has a valley shape to prevent the inorganic layer from being laminated and is designed with side surface inclinations of 65 degrees or smaller to minimize damage and moisture permeation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If laser beam irradiation is used to form a camera hole in the active area, then the camera can be disposed inside the active area, but damages such as cracks occur and image quality deteriorates
Solution Approach 1:
The active area is divided into a first area (where the opening is formed for camera placement) and a second area (remaining display area). This segmentation allows the camera to be disposed in the active area while isolating the damage zone from the functional display elements, preventing crack propagation to image quality critical regions.
2Reliability
If the organic light emitting layer connection is not cut at the opening, then the display structure remains continuous, but moisture permeation and damage can occur to the camera
Solution Approach 1:
The connection of the organic light emitting layer between the opening and the light emitting unit is cut and extracted. This isolation prevents moisture and damage from the opening area from reaching the camera, while the encapsulation layer is configured to enclose the opening separately, protecting the camera without requiring complex modifications to the entire display structure.
3Reliability
If the inorganic layer is allowed to laminate over the cut structure, then the encapsulation is more complete, but the inorganic layer may crack due to the valley shape
Solution Approach 1:
The inorganic layer is configured with different properties in different regions: in the first area over the cut structure, the inorganic layer has reduced thickness or is selectively removed to avoid cracking at the valley shape, while in the second area, the inorganic layer maintains complete encapsulation. This local quality differentiation protects both the inorganic layer integrity and encapsulation completeness.
4Productivity
If the opening is formed with steep side surfaces, then the opening can be formed more efficiently, but cracks are more likely to propagate to the active area
Solution Approach 1:
The opening is configured with asymmetric side surface inclination angles, where the first side surface has a different inclination angle than the second side surface. This asymmetric configuration optimizes both the opening formation process and crack propagation resistance by distributing stress differently on each side, preventing uniform crack propagation while maintaining manufacturing efficiency.
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
This solution enhances the reliability of the camera placement by reducing vulnerabilities and preventing damage or moisture permeation, thereby improving the overall performance and durability of the display device.
Implementation Method 1
The cut structure has a shape to suppress the inorganic layer which covers the cut structure from being laminated while making a valley shape
Implementation Method 2
The camera hole is generally formed by a process of irradiating laser beam to remove a part of the active area
Data Source
AI summary
Provided is a display device. The display device includes a base layer including an active area partitioned to display images and an inactive area adjacent to the active area, an opening located in a part of the active area and passing through the base layer and functional layers thereabove, and a cut structure located in the vicinity of the opening and provided to cut the connection of an organic light emitting layer between the opening and a light emitting unit. A camera may be provided in a position corresponding to the opening.