Gate Driving Circuit Current Limiting for Display Panel Protection
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Solution Overview
Problem
Existing gate driving circuits face issues with excessive current, leading to high temperatures and potential display panel burnout, which affects the display effect and increases production costs due to the need for expensive mask changes in LCD production lines.
Innovation Solution
A gate driving circuit with a current limiting circuit, comprising a resistor or sliding rheostat, is implemented to adjust the current magnitude of the gate driving signal, preventing excessive current flow by dynamically adjusting the resistance value based on the current magnitude, thereby preventing abnormal display and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the gate driving circuit outputs high current to drive the display panel, then the driving capability is improved, but the temperature increases and causes display panel burnout
Solution Approach 1:
The patent introduces a current limiting circuit as an intermediary component between the gate driving circuit and the display panel. This circuit includes a sensing resistor that detects current magnitude and a control circuit that adjusts the driving signal accordingly, thereby mediating the interaction between the driver and panel to prevent harmful overheating while maintaining adequate driving capability.
Solution Approach 2:
The patent implements a feedback mechanism where the current limiting circuit continuously monitors the current magnitude through the sensing resistor and dynamically adjusts the gate driving signal strength. When excessive current is detected, the control circuit reduces the driving signal to maintain current within safe thresholds, creating a closed-loop control system that prevents burnout while optimizing display performance.
2Reliability
If mask changes are implemented in LCD production line to prevent excessive current, then the reliability is improved, but the production cost increases
Solution Approach 1:
Instead of changing the physical mask structure in the production line, the patent changes the electrical parameters of the gate driving circuit by introducing controllable current limiting. The system dynamically adjusts current magnitude through electronic control rather than requiring physical manufacturing changes, thereby maintaining reliability while avoiding increased production costs associated with mask changes.
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
The current limiting circuit effectively prevents abnormal display by controlling the current magnitude, reducing the risk of display panel burnout and lowering production costs by eliminating the need for mask changes in the LCD production line.
Implementation Method 1
the current limiting circuit comprises a first resistor... adjusting a resistance value of the first resistor according to the current magnitude of the gate driving signal
Data Source
AI summary
The present disclosure provides a gate driving circuit, a current adjusting method thereof, and a display device. The gate driving circuit includes at least one gate driving sub-circuit. Each gate driving sub-circuit includes an output circuit and a current limiting circuit. The output circuit is configured to output a gate driving signal. The current limiting circuit is electrically connected to the output circuit. The current limiting circuit is configured to limit a current magnitude of the gate driving signal.