Common Seal Line for Light Emitting Display Devices
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Solution Overview
Problem
The existing methods for manufacturing organic light emitting display devices face extended forming and curing times for the seal due to the application of seals around individual light emitting diodes, which complicates the process and increases production time.
Innovation Solution
The method involves forming common seal lines between adjacent light emitting diodes on a mother substrate, allowing for reduced forming and curing times by applying the seal in a pattern that facilitates straight-line laser irradiation and using polymeric or inorganic materials with appropriate scribing and cutting techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seal is applied around each individual light emitting diode, then the seal integrity for each device is ensured, but the forming time and curing time are extended
Solution Approach 1:
The patent merges the seal application process by forming a common seal line that serves multiple adjacent light emitting diodes simultaneously. Instead of applying separate seals around each individual LED, a single continuous seal line is formed that encloses multiple devices, thereby reducing the total forming time and curing time while maintaining adequate seal integrity for each device.
Solution Approach 2:
The common seal line performs a universal function by serving as the seal for multiple adjacent light emitting diodes at the same time. This multi-functional approach allows one seal structure to protect several devices, eliminating the need for multiple separate seal applications and significantly reducing the overall process time.
2Reliability
If the seal is applied around each individual light emitting diode, then the seal coverage is sufficient, but the process complexity increases
Solution Approach 1:
The patent combines multiple individual seal applications into a single common seal line formation process. This merging simplifies the overall process by reducing the number of separate steps required, eliminating the need to position and apply seals around each individual LED, and thereby reducing process complexity while maintaining adequate coverage.
3Reliability
If the laser irradiation apparatus moves along the shape of the seal, then the seal is cured uniformly, but the curing time is extended
Solution Approach 1:
The patent inverts the traditional approach by having the seal line conform to the arrangement of the light emitting diodes rather than having the laser follow the seal shape. The common seal line is designed to enclose multiple LEDs in a simplified geometric pattern, allowing the laser irradiation apparatus to move along a more efficient path that reduces curing time while still achieving uniform curing across the seal.
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 approach reduces the forming and curing times of the seal, improving manufacturing efficiency and apparatus reliability by simplifying the seal application and curing process, while maintaining the integrity of the seal between substrates.
Implementation Method 1
a laser irradiation apparatus moves along a shape of the seal
Implementation Method 2
curing time of the seal
Data Source
Figure 1~2B
Figure 3A
Figure 3B
AI summary
Disclosed is a light emitting display device including a seal and a method of fabricating the same. The light emitting display device includes a first substrate composed of a pixel region and a non-pixel region disposed around the pixel region; a pad portion formed in the non-pixel region to supply a signal to the pixel region; a second substrate disposed to face the first substrate; and a seal provided between the first substrate and the second substrate and disposed to surround the pixel region. Here, the seal is disposed on a first side between the pixel region and the pad portion, on a second side facing the first side, and on an outer ring of third sides contacting both ends of the first side and the second side, and the seal disposed in the outer ring of the third sides is filled up to contour lines of the first substrate and the second substrate.