Signal Loading Method for OLED Aging Test Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During the aging test of Organic Light Emitting Diode (OLED) panels, short circuits can occur due to particle abnormalities in the panel bonding area, leading to high temperatures that can burn the power supply main board and affect the display's appearance and functionality, particularly for flexible panels where heat causes the film to curl, reducing product yield.
Innovation Solution
A signal loading method and generator that initially apply a first pair of voltage signals with a specific difference to separate signal channels for a time period to detect short circuits, and if none occur, a second pair of voltage signals with a greater difference is applied; if a short circuit is detected, the first pair is stopped, preventing further loading and avoiding damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large magnitude voltage signal is loaded to multiple signal channels for aging test, then testing efficiency is improved, but short circuit risk increases causing damage to power supply main board
Solution Approach 1:
The patent applies preliminary action by first loading a first pair of voltage signals with a first voltage difference before loading the second pair of voltage signals with a larger second voltage difference. This preliminary testing phase allows detection of potential short circuits in signal channels before applying full test voltage, preventing damage to the power supply main board while maintaining testing efficiency.
Solution Approach 2:
The patent implements beforehand cushioning by introducing a protective voltage difference between the first and second voltage signal pairs. The first voltage difference acts as a cushion or buffer that protects the system from immediate high-voltage damage, allowing safe detection of short circuits before committing to full-power testing.
2Speed
If voltage signals are loaded continuously without interruption, then testing speed is improved, but temperature increase causes film curling in flexible panels
Solution Approach 1:
The patent applies periodic action by loading voltage signals in distinct phases (first pair with first voltage difference, then second pair with second voltage difference) rather than continuous loading. This periodic approach allows temperature management between phases, preventing excessive heat accumulation that would cause film curling in flexible panels while maintaining overall testing speed.
3Reliability
If a first pair of voltage signals with smaller voltage difference is loaded first, then safety is improved, but testing time increases due to two-stage loading
Solution Approach 1:
The patent applies skipping by rapidly transitioning from the first voltage signal pair to the second voltage signal pair once the first phase completes successfully. The conditional loading structure allows the system to skip unnecessary delays - if no short circuit is detected in the first phase, the second phase immediately follows, minimizing total testing time while maintaining safety.
Data Source
AI summary
The present disclosure provides a signal loading method and a signal generator. The signal loading method includes: loading a first pair of voltage signals to at least one pair of separate signal channels for a time period, respectively, wherein the first pair of voltage signals have a first voltage difference therebetween; and determining whether a short circuit occurs in the at least one pair of signal channels within the time period, and if it is determined that no short circuit occurs in the at least one pair of signal channels within the time period, loading a second pair of voltage signals having a second voltage difference therebetween to the at least one pair of signal channels at the end of the time period. The second voltage difference is greater than the first voltage difference.