OLED Aging Test Isolation via Switching Apparatus
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Solution Overview
Problem
Existing OLED panel aging tests face challenges in preventing abnormal panels from affecting normal ones connected in parallel, while maintaining high efficiency.
Innovation Solution
An aging testing device with a signal generator and electric coupling apparatus, featuring switching apparatuses like thin film transistors, that disconnects abnormal OLED panels from the signal generator during testing, ensuring only normal panels receive the test signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple OLED panels are connected in parallel to the signal generator for simultaneous aging test, then testing efficiency is improved, but an abnormal panel will affect the test results of other normal panels
Solution Approach 1:
The patent divides the parallel-connected OLED panels into independently controllable groups using switching apparatus (thin film transistors). Each panel or group of panels can be individually switched on or off, allowing the system to maintain high productivity when all panels are connected in parallel while ensuring reliability by isolating abnormal panels through segmented control. This segmentation enables selective testing without affecting other panels.
Solution Approach 2:
The switching apparatus (thin film transistor) acts as an intermediary component between the signal generator and each OLED panel. This intermediary enables independent control of each panel's connection to the signal generator, allowing the system to achieve both high productivity (all panels connected) and high reliability (abnormal panels isolated) by mediating the electrical connection through controllable switches.
2Duration of action of stationary object
If an abnormal OLED panel remains connected in parallel during aging test, then testing continuity is maintained, but the abnormal panel causes false abnormal results for other normal panels
Solution Approach 1:
The patent implements dynamic control of panel connections through switching apparatus that can change the electrical connection state based on panel performance. During aging testing, if a panel is detected as abnormal, the switching apparatus dynamically switches that panel off, maintaining testing continuity for normal panels while eliminating the source of measurement errors. This dynamic adjustment ensures both continuous testing and accurate results.
Solution Approach 2:
The system employs feedback mechanisms to monitor the performance of each OLED panel during aging testing. When feedback indicates an abnormal panel, the control system activates the switching apparatus to isolate that panel. This feedback loop ensures testing continuity by automatically managing panel connections based on real-time performance data, preventing abnormal panels from affecting measurement precision of normal panels.
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 allows simultaneous high-efficiency testing of multiple OLED panels by isolating abnormal ones, preventing their impact on normal panels and ensuring accurate results.
Implementation Method 1
The switching apparatus includes a thin film transistor. The signal generator further includes a third signal terminal. A control electrode of the thin film transistor is electrically coupled to the third signal terminal.
Data Source
AI summary
Embodiments of the present disclosure provide an organic electroluminescent display panel, an aging testing device and method, and a display device. A signal generator can simultaneously drive a plurality of parallel organic electroluminescent display panels to ensure the high efficiency of the aging test. In addition, during the aging test, the electrical coupling between the normal organic electroluminescent display panel and the signal generator can be maintained, and the electric coupling between the abnormal organic electroluminescent display panel and the signal generator can be disconnected. Thus, it is possible to prevent the abnormal organic electroluminescent display panel from affecting other normal organic electroluminescent display panels in parallel therewith, under the premise of ensuring the high efficiency of the aging test.