Capacitor Stabilizes Start Pulse Signal in LCD Gate Driver
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In liquid crystal display (LCD) devices, static electricity generated on start pulse signal input lines often disrupts the timely application of start pulse signals to gate driver integrated-circuit chips, leading to malfunctions and instability in signal transmission.
Innovation Solution
A capacitor is formed between the input terminal of the driving circuit and the start pulse signal input line on the thin film transistor array substrate to stabilize the start pulse signal, minimizing static electricity and ensuring consistent signal delivery to the gate driver integrated-circuit chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If LOG type signal lines are used to eliminate PCB and make the LCD device slimmer, then device thickness is reduced, but static electricity is generated on the signal lines causing signal transmission instability
Solution Approach 1:
A capacitor is introduced as an intermediary component between the LOG type signal line and the gate driver integrated-circuit chip. The capacitor acts as a mediator that couples the signal while providing electrostatic shielding, thereby maintaining signal transmission stability without increasing device thickness significantly.
Solution Approach 2:
The capacitor's second electrode connected to ground serves to convert the harmful static electricity effect into a beneficial shielding mechanism. By providing a reference potential and discharge path, the capacitor transforms the static electricity problem into an effective electrostatic shielding solution that protects the signal line.
2Manufacturing precision
If start pulse signal with very short enabling time is applied to control gate driver timing, then driving timing precision is improved, but high impulse voltage is generated inducing static electricity on signal lines
Solution Approach 1:
The capacitor serves as an intermediary coupling element between the start pulse signal line and the gate driver chip input terminal. It allows the high-frequency, short-duration start pulse to pass through while blocking and dissipating the high impulse voltage that would otherwise generate static electricity on the signal line.
Solution Approach 2:
The capacitor changes the electrical parameters of the signal transmission path by providing a low-impedance path for high-frequency components while maintaining DC isolation. This parameter transformation allows the short enabling time start pulse to maintain its timing precision function while reducing its harmful high impulse voltage effects.
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 solution effectively reduces static electricity interference, allowing for stable and timely application of start pulse signals to the gate driver integrated-circuit chips, thereby enhancing the reliability and performance of the LCD device.
Implementation Method 1
A capacitor is formed between the input terminal of the driving circuit and the start pulse signal input line on the thin film transistor array substrate to stabilize the start pulse signal
Data Source
AI summary
An LCD device is disclosed.The liquid crystal display device includes a capacitor formed between the input terminal of an internal driving circuit and a LOG type signal line, which receive the start pulse signal. Therefore, the LCD device can stably drive its internal driving circuit, even though static electricity is generated on the LOG signal line which is used for transferring the start pulse signal of a short enabling time.