RFID Antenna on Sealing Substrate for OLED Displays
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Solution Overview
Problem
Existing organic light emitting display devices lack integrated radio frequency identification (RFID) functionality, limiting their ability to serve multiple functions beyond simple display applications.
Innovation Solution
Incorporating an RFID antenna pattern on a transparent sealing substrate, electrically coupled to an RFID chip, which is positioned on the non-pixel region of the substrate, allowing for the implementation of RFID functionality within the organic light emitting display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RFID functionality is integrated into the display device, then the device can serve multiple functions (smart card, etc.), but the device structure becomes more complex
Solution Approach 1:
The patent combines the RFID antenna pattern with the sealing substrate structure, integrating the RFID functionality into the existing display device architecture. The antenna pattern is formed directly on the sealing substrate using transparent conductive materials, eliminating the need for separate RFID components and reducing overall structural complexity despite adding multi-functionality.
Solution Approach 2:
The sealing substrate serves dual purposes: it acts as both the sealing structure for the display device and as the substrate for the RFID antenna pattern. This universal approach allows the same component to fulfill multiple functions, enabling smart card capabilities while maintaining the original display functionality.
2Adaptability or versatility
If RFID antenna pattern is placed on sealing substrate, then RFID functionality is achieved, but the transparent material of sealing substrate may interfere with RFID signal
Solution Approach 1:
The patent uses transparent conductive materials for the RFID antenna pattern that are optimized for electromagnetic wave transmission. The transparency and specific material properties are selected to minimize interference with RFID signals while maintaining the visual transparency of the sealing substrate, thus resolving the conflict between RFID functionality and signal transmission reliability.
3Area of stationary object
If RFID chip is positioned on non-pixel region, then display area is preserved, but the device size increases
Solution Approach 1:
The RFID chip is positioned in the non-pixel region, utilizing the existing peripheral space that would otherwise be unused for display purposes. This partial placement strategy allows RFID functionality to be added without encroaching on the pixel region, thereby preserving the display area while minimizing the increase in overall device size.
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
Enables the organic light emitting display device to serve as a smart card or component of larger devices, such as cellular telephones, by integrating RFID capabilities without compromising display functionality, especially in thin, card form factor designs.
Implementation Method 1
an RFID antenna pattern on the sealing substrate
Implementation Method 2
organic light emitting diodes that emits light by re-combination of electrons and holes
Data Source
AI summary
An organic light emitting display device having RFID includes a substrate including a pixel region having at least one organic light emitting device and a non-pixel region formed on the outer circumference of the pixel region, a sealing substrate that seals at least the pixel region of the substrate, an RFID antenna pattern on the sealing substrate, and an RFID chip electrically coupled to the RFID antenna pattern.