Electro-optical Driving Circuit Noise Suppression via Dynamic Capacitor Control
Solution Overview
Problem
Existing electro-optical devices, such as liquid crystal displays, face challenges in suppressing voltage amplitudes of data lines while maintaining a simple configuration and avoiding adverse effects on display quality due to complex capacitor line driving circuits and noise-induced voltage fluctuations.
Innovation Solution
A driving circuit configuration that includes scanning lines, data lines, capacitor lines, pixel switching elements, pixel capacitors, and storage capacitors, where the capacitor line driving circuit adjusts voltages applied to capacitor lines by changing the scanning line selection and using transistors to connect capacitor lines to power feed lines, and a capacitive signal output circuit to maintain target voltages and cancel noise components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If capacitor lines are driven by binary voltage in synchronization with scanning line selection to suppress data signal voltage amplitudes, then voltage amplitude suppression is achieved, but the circuit configuration becomes complex
Solution Approach 1:
The patent combines the capacitor line driving function with the existing scanning line driving circuit by having the scanning line driving circuit also supply capacitive signals to the capacitor lines. This merging eliminates the need for a separate capacitor line driving circuit, thus suppressing voltage amplitudes while avoiding increased circuit complexity.
Solution Approach 2:
The scanning line driving circuit is designed to perform multiple functions: driving scanning lines and simultaneously driving capacitor lines. This multi-functionality allows the same circuit to suppress data signal voltage amplitudes without requiring additional dedicated circuits for capacitor line control.
2Device complexity
If capacitor lines are driven with fixed voltage to simplify circuit configuration, then circuit complexity is reduced, but display quality deteriorates due to noise-induced voltage deviations
Solution Approach 1:
The patent implements dynamic voltage adjustment for capacitor lines based on the selected scanning line. The capacitive signal output circuit adjusts the voltage level of capacitive signals in real-time according to the currently selected scanning line, ensuring that the holding voltage remains appropriate even when noise causes voltage deviations, thus maintaining display quality without overly complex circuitry.
Solution Approach 2:
The patent employs a feedback mechanism where the capacitive signal output circuit monitors the selected scanning line and adjusts the capacitive signal voltage accordingly. This feedback ensures that the capacitor line voltage adapts to maintain proper holding voltage levels, preventing display quality degradation from noise-induced deviations.
3Ease of operation
If capacitor line voltage is not adjusted when scanning lines are selected, then circuit operation is simplified, but display quality deteriorates due to inability to maintain holding voltage
Solution Approach 1:
The patent applies preliminary action by adjusting the capacitor line voltage in advance when a scanning line is selected. The capacitive signal output circuit proactively changes the voltage level before noise or other factors can cause the holding voltage to deviate, ensuring display quality is maintained without requiring complex real-time correction mechanisms.
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
This configuration effectively suppresses voltage amplitudes on data lines, reduces display adverse effects from voltage fluctuations, and avoids complex capacitor line driving circuit configurations, maintaining display quality while minimizing power consumption and noise impact.
Implementation Method 1
The storage capacitor is connected between the one end of the pixel capacitor and the capacitor line arranged in a position corresponding to that of the corresponding one of the scanning lines
Data Source
AI summary
A driving circuit includes a plurality of scanning lines, a plurality of data lines, a plurality of capacitor lines, pixels, a scanning line driving circuit, a capacitor line driving circuit, a first capacitive signal output circuit, and a data line driving circuit. Each of the pixels includes a pixel switching element, a pixel capacitor, and a storage capacitor. The capacitor line driving circuit supplies a first capacitive signal to the capacitor line when the one scanning line is selected, and changes a voltage value of the first capacitive signal when a scanning line, located a predetermined number of scanning lines away from the one scanning line, is selected. The first capacitive signal output circuit adjusts and outputs a voltage of the first capacitive signal when the one scanning line is selected. The data line driving circuit supplies the pixels with data signals of voltages corresponding to gray scale levels.