GOA Circuit Reliability Testing via Simulated Thermal Gradients
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Solution Overview
Problem
Conventional liquid crystal panel reliability tests cannot fully reflect the influence of temperature gradients from direct-lit and edge-lit backlights on the operation of gate driver on array (GOA) circuits, leading to inefficiencies and resource wastage in identifying temperature-related issues.
Innovation Solution
A method and system that simulate the temperature effects of edge-lit backlights on GOA circuits by using heaters on liquid crystal display modules, allowing for reliability testing under conditions that mimic both direct-lit and edge-lit backlight scenarios, with temperature control units and monitoring systems to assess the impact on GOA circuit reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If direct-lit backlights are used for reliability testing, then the testing process is simple and backlights are readily available, but the temperature distribution is even and does not reflect the temperature gradient effects of edge-lit backlights on GOA circuits
Solution Approach 1:
A heater is introduced as an intermediary device to simulate the temperature gradient effect of edge-lit backlights. The heater is disposed on the edge region of the liquid crystal panel corresponding to the GOA circuit region, allowing it to create a controlled temperature gradient that mimics the thermal environment of edge-lit backlight configurations without requiring actual edge-lit backlight hardware.
Solution Approach 2:
The temperature distribution parameter is changed from uniform (direct-lit backlight condition) to gradient (edge-lit backlight condition) by controlling the heater's temperature and position. This allows the same testing setup to evaluate both backlight types by adjusting the thermal parameters rather than changing the physical backlight hardware.
2Measurement precision
If edge-lit backlights are used for reliability testing, then the temperature gradient effect on GOA circuits is accurately reflected, but the selection of suitable backlights is limited and small-batch backlights are not readily available
Solution Approach 1:
Instead of using the actual edge-lit backlight hardware for testing, the invention creates a thermal copy or simulation of its effect using a heater. The heater reproduces the temperature gradient pattern that an edge-lit backlight would generate, allowing testers to evaluate the thermal impact without needing the complex and scarce edge-lit backlight assemblies.
Solution Approach 2:
The thermal effect (temperature gradient) is extracted from the edge-lit backlight system and separated from its physical hardware implementation. By taking out only the essential thermal characteristic and reproducing it with a simple heater, the invention eliminates the need for complex backlight hardware while preserving the critical thermal stress conditions for GOA circuit evaluation.
3Ease of operation
If conventional reliability tests are conducted without temperature simulation, then the testing process is straightforward, but temperature-related issues in GOA circuits cannot be identified until screen abnormalities occur
Solution Approach 1:
The heater is activated during the reliability testing process to pre-establish the temperature gradient condition before any potential GOA circuit failures occur. This preliminary application of thermal stress allows the test to proactively identify temperature-related reliability issues rather than waiting for symptoms to manifest, enabling preventive quality assurance.
Solution Approach 2:
The system monitors the temperature distribution and GOA circuit performance under heated conditions, providing feedback on how the circuit responds to thermal stress. This feedback mechanism enables real-time detection of temperature-related reliability issues and allows for adjustment of test parameters to better simulate actual operating conditions.
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
Enables comprehensive evaluation of GOA circuit reliability under various backlight conditions, reducing manpower and resource wastage by simulating temperature effects, thereby improving testing efficiency and accuracy.
Implementation Method 1
disposing a heater on at least one edge of an edge region of an upper surface of the liquid crystal panel
Implementation Method 2
a liquid crystal display module including a liquid crystal panel
Data Source
AI summary
A method of examining reliability of a gate driver on array (GOA) circuit and a system thereof are provided. The method includes matching a liquid crystal panel with a direct-lit backlight/an edge-lit backlight to form a liquid crystal display module; disposing a heater on a position of the liquid crystal panel upper surface corresponding to a GOA circuit region; implementing a reliability test to the liquid crystal display module, wherein the heater heats the liquid crystal panel to a predetermined temperature; and observing a screen situation of the liquid crystal panel to examine an effect of temperature on the reliability of the GOA circuit.