OLED Panel Abnormality Detection via Gate Line Sensing
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Solution Overview
Problem
Existing organic light emitting display devices cannot effectively detect and respond to panel abnormalities such as short circuits, burning, or line defects in the active area, as they lack sensing lines for detection, leading to potential damage to the gate driving IC or panel.
Innovation Solution
Incorporating a detection unit that uses sensing signals collected through gate lines to detect panel abnormalities in the active area, allowing for the control of power supply to prevent further damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing lines are added to detect panel abnormalities in the active area, then detection capability is improved, but device complexity increases
Solution Approach 1:
The gate lines are designed to serve dual functions: as scan signal transmission lines for normal display operation and as sensing lines for detecting panel abnormalities such as short circuits and burning. By making the gate lines multi-functional, the patent eliminates the need for separate sensing lines, thereby improving detection capability without increasing device complexity
Solution Approach 2:
The existing gate line infrastructure is utilized to perform the sensing function, allowing the system to detect abnormalities using its own structural elements rather than requiring additional dedicated components. This self-service approach enables abnormality detection while maintaining the original device architecture
2Measurement precision
If additional sensing lines are incorporated in the active area, then detection precision is improved, but manufacturing complexity increases
Solution Approach 1:
The gate lines perform both scan signal transmission and abnormality sensing functions, eliminating the need for additional sensing lines that would complicate the manufacturing process. This multi-functional design maintains detection precision while simplifying panel fabrication
3Speed
If fast response time is achieved through conventional pixel circuits, then display performance is improved, but protection against panel abnormalities is insufficient
Solution Approach 1:
The sensing function is activated continuously through the gate lines to detect panel abnormalities such as short circuits and burning in real-time. By performing preliminary detection during normal operation, the system can identify abnormalities before they cause significant damage, thus maintaining fast response time while improving reliability
Solution Approach 2:
The sensing signals detected through gate lines provide feedback about the panel's condition to the control circuit. This feedback mechanism enables real-time monitoring and rapid response to abnormalities, allowing the system to maintain both fast display response and reliable protection against failures
Data Source
AI summary
Disclosed is an organic light emitting display device. The organic light emitting display device includes a panel in which a plurality of pixels are respectively formed in intersection areas between a plurality of gate lines and a plurality of data lines formed in an active area, a pixel circuit is included in each of the pixels, and a plurality of power lines are formed for supplying power to drive the pixel circuit; a gate driving IC configured to supply a scan signal to the gate lines, a power supply configured to supply the power to the power lines, a detection unit configured to detect a panel abnormality in the active area by using a sensing signal collected through a sensing line electrically connected to a corresponding gate line, and a controller configured to control driving of the power supply according to the detection result of the detection unit.