Display Hole Structure for Active-Area Optical Openings
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Solution Overview
Problem
Existing display devices face challenges in maximizing the active area for image display while forming optical openings without causing physical damage during the manufacturing process.
Innovation Solution
A method involving laser processing with specific beam types is used to form holes in the active area of a display device, including forming a groove with a donut beam, cutting holes with a Bessel beam, and creating cutting cracks with another donut beam, minimizing physical contact and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If physical contact methods are used to form openings in the display device, then the manufacturing process is simple, but damage occurs to the display device during opening formation
Solution Approach 1:
The patent replaces mechanical drilling or punching methods with laser beam processing to form openings in the display device. The laser beam (specifically a Bessel beam) acts as a non-contact tool that vaporizes or ablates material to create precise openings without physical contact, thereby eliminating mechanical damage while maintaining manufacturing capability
Solution Approach 2:
The patent introduces a laser beam as an intermediary energy carrier between the manufacturing system and the display device. This intermediary enables opening formation through optical energy conversion (laser to thermal to material removal) rather than direct mechanical contact, resolving the contradiction between ease of manufacture and damage prevention
2Area of stationary object
If the active area is maximized for image display, then the display quality is improved, but it becomes difficult to accommodate optical elements requiring openings
Solution Approach 1:
By using laser beam processing instead of mechanical methods, the patent enables precise opening formation even in the limited space of the active area. The non-contact nature and high precision of laser processing allow openings to be created without compromising the surrounding display structure, thus accommodating optical elements while maintaining maximum active area
Solution Approach 2:
The patent applies local quality by creating specific openings (with particular sizes, shapes, and positions) within the active area to accommodate optical elements like cameras and sensors. The laser processing allows different regions of the display device to have different properties - the active area maintains its display function while localized openings provide optical access, resolving the contradiction between area maximization and functional adaptability
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 allows for the formation of holes in the active area without causing damage, thereby increasing the size of the active area for image display and accommodating optical elements.
Implementation Method 1
forming a groove to expose the base substrate by irradiating a first laser beam, which is a donut beam having a minimum energy value at a center of a beam spot at a focal point, onto the stacked structure of the target substrate along a cutting line while scanning the target substrate
Implementation Method 2
forming a cutting hole by irradiating a second laser beam, which is a Bessel beam, onto the base substrate exposed by the groove along the cutting line so as to be separated on a spot basis
Implementation Method 3
forming a cutting crack by irradiating a third laser beam, which is the donut beam, onto the base substrate exposed by the groove along the cutting line while scanning the target substrate
Data Source
AI summary
A display device including a substrate and a stacked structure on the substrate. The substrate has a first hole, and the stacked structure has a second hole. The second hole partially overlaps the first hole and has an edge outside the first hole in a plan view. The substrate has a substrate exposed portion exposed to the second hole, and the substrate exposed portion is partially depressed in an edge direction of the second hole.