OLED Substrate Testing Device with Voltage Compensation
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Solution Overview
Problem
Conventional substrate testing for OLED displays is time-consuming and inefficient, requiring separate testing of each panel and equipment adjustments for changes in circuit wiring or panel size, leading to increased manufacturing costs and reduced testing efficiency.
Innovation Solution
A substrate testing device with integrated detection compensation devices that compare and compensate power supply voltages and data voltages, allowing for simultaneous testing of multiple panels without separate equipment, reducing the need for individual brightness measurements and accommodating changes in panel size or wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each display panel is tested separately for brightness, color coordinate and color temperature, then measurement precision is improved, but testing time increases and productivity decreases
Solution Approach 1:
The patent merges multiple separate testing operations into a single integrated testing process. Multiple display panels are tested simultaneously using shared test circuits and control units, combining what were previously separate measurement tasks into one coordinated operation that maintains measurement precision while dramatically improving testing throughput
Solution Approach 2:
The test device incorporates universal test circuits and control units that can handle multiple display panels with different configurations. The system is designed to accommodate various panel sizes and circuit wiring arrangements through reconfigurable test paths and adaptive measurement protocols, enabling one device to perform multiple testing functions
2Adaptability or versatility
If testing equipment is adjusted for changes in circuit wiring or panel size, then adaptability is improved, but testing time increases and productivity decreases
Solution Approach 1:
The test device employs dynamic reconfiguration capabilities where test circuits can be programmatically adjusted during operation. Control units modify test parameters, signal paths, and measurement configurations in real-time based on the specific panel being tested, eliminating the need for manual equipment adjustment and enabling seamless adaptation to different panel types
Solution Approach 2:
The system changes operational parameters such as test signal frequencies, voltage levels, and measurement timing based on panel specifications. The test device automatically adjusts these parameters according to the detected panel configuration, maintaining adaptability while preserving testing efficiency through automated parameter optimization
3Measurement precision
If separate testing equipment is used for each display panel, then measurement precision is improved, but device complexity increases and manufacturing cost increases
Solution Approach 1:
The patent combines multiple testing functions and circuitry into a single integrated test device. Shared components including power supply units, signal generators, measurement circuits, and control processors are multiplexed across multiple display panels, reducing overall device complexity while maintaining the measurement precision that would otherwise require separate dedicated equipment for each panel
Data Source
AI summary
Exemplary embodiments relate to a substrate testing device having a comparator adapted to compare a power supply voltage supplied by a power supply voltage line with a dropped power supply voltage detected by a power supply voltage detection line and to output a voltage difference, and a level shifter circuit adapted to compensate a data voltage with a voltage up to an amount equal to the voltage difference output from the comparator and to supply the data voltage to a display panel.