Stress-Detection-Miss Circuit for OLED Panels
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Solution Overview
Problem
Existing organic light-emitting display panels often experience stress-detection-miss, leading to serious flickering issues and poor display effects, which are not effectively addressed by current stress image detection methods, resulting in material waste and reduced yield.
Innovation Solution
A display panel with a stress-detection-miss detection circuit that uses high-voltage and low-voltage detection voltages to determine if the panel has passed stress image detection, ensuring prompt information is generated to avoid stress-detection-miss, and includes a structural diagram of the display panel with power signal lines, external stress detection terminals, and a stress-detection-miss detection circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stress image detection is performed using conventional methods, then flickering problems can be improved, but stress-detection-miss occurs leading to poor display quality
Solution Approach 1:
The patent applies preliminary action by performing stress image detection at multiple voltage levels (high voltage and low voltage) before the display panel leaves the factory. The detection circuit applies high voltage first to stress the panel, then applies low voltage to verify detection accuracy. This preliminary multi-stage detection prevents stress-detection-miss and ensures high display quality before production.
2Measurement precision
If high voltage detection voltage is applied to power signal lines, then stress image detection effectiveness is improved, but detection accuracy decreases due to stress-detection-miss
Solution Approach 1:
The patent applies periodic action by performing stress image detection in multiple periodic stages: first applying high voltage detection voltage to stress the panel, then applying low voltage detection voltage to verify detection. This periodic multi-stage detection process ensures both measurement precision and reliability by cross-validating results at different voltage levels.
Solution Approach 2:
The patent applies feedback by using the low voltage detection results to verify and correct the high voltage detection results. The detection circuit compares the stress image at low voltage with the expected pattern, and if stress-detection-miss is detected, it can trigger re-detection or adjustment. This feedback mechanism ensures both precision and reliability of the stress detection process.
Data Source
AI summary
The present disclosure provides a display panel, including: a display driving circuit; power signal lines connected to the display driving circuit; an external stress detection terminal; and a stress-detection-miss detection circuit, that first access ports of the external stress detection terminal are one-to-one connected to the power signal lines; a second access port of the external stress detection terminal is connected to the stress-detection-miss detection circuit; any one of the power signal lines transmits a power supply voltage during normal display of the display panel, and transmits a first high-voltage detection voltage from the first access ports during a stress image detection of the display panel; and the stress-detection-miss detection circuit includes: a prompt information path formed responding to a second high-voltage detection voltage from the second access port during the stress image detection, to generate prompt information responding to a low-voltage detection voltage from the second access port during a stress-detection-miss detection of the display panel.