Display Panel Detection Circuit With Switching Path
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display panel detection mechanisms require high voltage testing signals due to high turn-on resistance, and once disconnected, they cannot effectively re-test the panel, causing operational inconvenience.
Innovation Solution
A display panel with a switching circuit and testing pads that utilize reserved and transmission paths, allowing for selective connection and disconnection via control signals to reduce turn-on resistance and enable re-testing without additional wires, using partially overlapped paths to minimize area and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If detection mechanisms are provided in display panels during manufacture, then yield rate improvement is achieved, but turn-on resistance becomes high requiring high voltage testing signals
Solution Approach 1:
The patent applies dynamics by making the detection mechanism's connection state changeable through a switching circuit. The detection mechanism can be dynamically connected or disconnected from the display panel based on testing needs, rather than being permanently connected. This dynamic control allows the system to maintain low turn-on resistance during normal operation while enabling testing when required.
Solution Approach 2:
The patent changes the electrical connection parameter by introducing a switching circuit that can alter the resistance state. When the switch is in the off state, the detection mechanism is disconnected, resulting in high resistance that prevents interference with normal display operation. When the switch is on, the detection mechanism connects with low resistance for testing purposes.
2Ease of operation
If detection mechanisms are disconnected from display panel, then normal operation is achieved, but subsequent testing cannot be performed effectively
Solution Approach 1:
The patent applies preliminary action by pre-configuring a switching circuit that maintains the capability to connect the detection mechanism to the display panel even after initial disconnection. The switching circuit is built into the system beforehand, allowing the detection mechanism to be reconnected for subsequent testing without requiring additional external wiring or complex reconfiguration.
Solution Approach 2:
The switching circuit serves multiple functions: it allows the detection mechanism to remain disconnected during normal operation, enables reconnection for subsequent testing, and provides control over when testing occurs. This multi-functionality resolves the contradiction by making the system adaptable to both normal operation and testing requirements.
3Adaptability or versatility
If additional wires are added for re-testing, then re-testing capability is achieved, but device complexity and cost increase
Solution Approach 1:
The patent merges the testing function with the existing display panel structure by integrating the switching circuit into the panel's existing circuitry. The detection mechanism shares the same physical space and circuit pathways as the display elements, eliminating the need for separate external wiring for testing purposes.
Data Source
AI summary
A display panel includes a gate line, a data line, a first testing pad, a second testing pad, and a switching circuit. The gate line receives a gate-driving signal from a first node. The data line receives a data signal from a second node. The first testing pad transmits the gate-driving signal via one of a first reserved path and a first transmission path to the first node. The second testing pad transmits the data signal via one of a second reserved path and a second transmission path to the second node. The switching circuit selectively connects the first transmission path to the first node and connects the second transmission path to the second node. The first testing pad is connected to the first node via the first reserved path, and the second testing pad is connected to the second node via the second reserved path.