Circular OLED Wearable Dial with Ring-Shaped Bonding
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Solution Overview
Problem
Wearable devices with OLED technology face challenges due to cutting technique limitations and display driving, resulting in misalignment issues during the bonding process of flexible OLED unit modules, especially when the substrate expands or contracts, leading to inefficient use of space and inability to display pointers.
Innovation Solution
A wearable device design featuring a flexible OLED unit module with a ring-shaped bonding region and a driver IC with corresponding ring-shaped bonding pins, allowing for free shape cutting and bending to accommodate a circular display and reduce misalignment, enabling pointer display and efficient use of space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional bonding pin and bonding contact design is used with flexible OLED, then the device can be manufactured with standard processes, but bonding misalignment occurs when the substrate expands or contracts
Solution Approach 1:
The patent changes the bonding contact arrangement from a conventional linear/grid pattern to a circular pattern. The bonding contacts are arranged in a ring shape around the display region, and the bonding pins on the driver IC are correspondingly arranged in a circular pattern. This circular configuration allows the bonding interface to accommodate substrate expansion and contraction more effectively, maintaining alignment despite dimensional changes in the flexible OLED.
2Ease of manufacture
If a square dial plate design is used, then the device structure is simple and easy to manufacture, but pointer display capability is lost
Solution Approach 1:
The patent adopts a circular dial plate design instead of a conventional square shape. The flexible OLED is cut into a circular form factor, and the display region is configured as a circle. This circular design enables pointer display functionality while maintaining ease of manufacture through the free shape cutting technique, thus resolving the contradiction between structural simplicity and display versatility.
3Reliability
If the bonding region area is large, then more bonding contacts can be provided for better connectivity, but misalignment issues are exacerbated when the substrate expands
Solution Approach 1:
The patent configures the bonding region as a circular area with bonding contacts arranged in a ring pattern. This circular bonding region design allows for adequate number of bonding contacts to ensure reliable connectivity while the circular geometry inherently accommodates substrate expansion and contraction better than rectangular configurations, thus maintaining alignment precision despite the larger bonding area.
4Adaptability or versatility
If free shape cutting technique is used to create circular dial plate, then pointer display is enabled and space efficiency is improved, but cutting process complexity increases
Solution Approach 1:
The patent employs laser cutting technology to create the circular dial plate shape from the flexible OLED substrate. This laser-based cutting method replaces conventional mechanical cutting processes, enabling precise circular geometry and free shape fabrication. The laser cutting technique achieves the required precision for circular dial plate and pointer display implementation while managing the complexity through advanced manufacturing technology.
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 design effectively reduces bonding misalignment caused by substrate expansion or contraction, allowing for a compact circular dial plate with a pointer display, enhancing the usability and efficiency of wearable OLED devices.
Implementation Method 1
a laser beam is irradiated on a contour of the flexible OLED unit module to be cut
Implementation Method 2
laser vaporization cutting
Implementation Method 3
laser melting cutting
Implementation Method 4
a molten organic substance is blown off by a high-speed airflow coaxial with a light beam
Implementation Method 5
bonding the driver IC to the bonding region
Data Source
AI summary
A wearable device with a circular dial plate design and a method of preparing the wearable device are provided. A circular contour is achieved by a free shape cutting technique, this design can support a pointer display. A bonding region of an organic light emitting diode (OLED) unit module on which a driver integrated circuit (IC) is bonded can be effectively bent to the back of a display panel, thereby, saving space of an entire display module. In addition, the driver IC of the circular display panel adopts a ring-shaped bonding contacts design to reduce the compensation demand caused by expansion or contraction issues in a preparing process.