Multi-Layer Light Blocking Pattern for Display Transmittance
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Solution Overview
Problem
Display devices face challenges in achieving improved transmittance in specific regions while maintaining reliability, particularly in preventing defects during the manufacturing process of electrodes.
Innovation Solution
The display device incorporates a light blocking pattern that includes a first light blocking pattern at the same layer as the lower electrode and a second light blocking pattern under it, both made of the same material, to prevent defects during the patterning process and enhance transmittance by blocking incident lasers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-layer light blocking pattern is used, then the manufacturing process is simple, but electrode defects occur during patterning and transmittance is reduced
Solution Approach 1:
The light blocking pattern is divided into multiple layers (first light blocking pattern and second light blocking pattern) positioned at different heights. This segmentation allows each layer to perform specific functions: the first layer prevents electrode defects during patterning, while the second layer blocks incident lasers, thereby resolving the contradiction between manufacturing simplicity and defect prevention.
Solution Approach 2:
The solution transitions from a two-dimensional single-layer pattern to a three-dimensional multi-layer structure. By adding the vertical dimension with stacked light blocking patterns at different heights, the patent achieves both defect prevention and laser blocking without significantly complicating the manufacturing process.
2Reliability
If the light blocking pattern is placed close to light-emitting elements, then transmittance is improved, but electrode defects occur during patterning
Solution Approach 1:
The light blocking pattern is segmented into multiple layers with different spatial relationships to the light-emitting elements. The first light blocking pattern can be positioned closer to improve transmittance, while the second layer provides protection during patterning, allowing each segment to optimize for its specific function.
Solution Approach 2:
The multi-layer light blocking pattern structure is established beforehand to prevent electrode defects during the patterning process. By having the protective structure in place before critical patterning steps, the patent enables subsequent high-precision manufacturing without defects.
3Reliability
If a multi-layer light blocking pattern is used, then electrode defects are prevented and transmittance is improved, but the device structure becomes more complex
Solution Approach 1:
The multi-layer light blocking pattern structure performs multiple functions simultaneously: the first layer prevents electrode defects during patterning, the second layer blocks incident lasers, and together they maintain high transmittance. This multi-functionality justifies the increased structural complexity by delivering comprehensive reliability improvements.
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 configuration increases transmittance in specific regions, improving signal quality and preventing electrode defects, thereby enhancing the reliability of the display device.
Implementation Method 1
a light blocking pattern overlapping with the connection part in a plan view... to prevent defects during the patterning process and enhance transmittance by blocking incident lasers
Data Source
AI summary
A display device includes a display panel including: a first display region; a main display region; first light-emitting elements at the first display region; a connection part at the first display region, and connecting adjacent first light-emitting elements from among the first light-emitting elements to each other; and a light blocking pattern overlapping with the connection part in a plan view. The light blocking pattern includes: a first light blocking pattern spaced from the first light-emitting elements with a first gap between the first light blocking pattern and adjacent ones of the first light-emitting elements, the first light blocking pattern being located at the same layer as that at which at least a portion of each of the first light-emitting elements is located; and a second light blocking pattern under the first light blocking pattern, at least a portion of the second light blocking pattern overlapping with the first gap.