Display Driver Signal Waveform Compensation for Noise Reduction
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Solution Overview
Problem
Display panel drivers often introduce noise into data signals due to their structure and signal transmission wiring, which degrades the display quality of display panels.
Innovation Solution
A display apparatus that adjusts the waveform of data signals based on the temperature of data driving chips, using a timing controller with an eye-diagram compensating part to determine compensating values and adjust the waveform to meet noise limits, thereby improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data signals are transmitted through the display panel driver structure and signal transmitting wiring, then the data driver can drive the display panel, but noise is introduced into the data signals which degrades display quality
Solution Approach 1:
The timing controller performs eye-diagram compensation on the data signals before transmission to the data driver. By adjusting waveform parameters (amplitude, horizontal width, vertical width) in advance based on temperature conditions, the system proactively compensates for expected noise degradation, ensuring the compensated signals meet display quality requirements even after passing through the noisy driver structure and wiring
Solution Approach 2:
The timing controller dynamically changes waveform parameters of the data signals based on temperature conditions. At different temperatures, the controller adjusts amplitude, horizontal width, and vertical width parameters to optimize signal integrity. This parameter adaptation allows the system to compensate for temperature-dependent noise characteristics and maintain reliable display performance across varying operating conditions
2Reliability
If the waveform of data signals is adjusted based on temperature to compensate noise, then display quality is improved, but the complexity of the timing controller increases
Solution Approach 1:
The timing controller incorporates temperature-dependent waveform adjustment capabilities by changing key parameters (amplitude, horizontal width, vertical width) based on detected temperature conditions. This parameter-based approach allows complex compensation behavior to be achieved through controlled variable adjustment rather than complex circuit architecture, managing the trade-off between performance and complexity
Solution Approach 2:
The system uses temperature sensing feedback to automatically adjust data signal waveform parameters. The timing controller monitors temperature conditions and uses this feedback to select appropriate compensation parameters, creating a closed-loop system that adapts to environmental changes without requiring complex manual intervention or overly sophisticated control logic
Data Source
AI summary
A display apparatus includes a display panel, a gate driver, a data driver and a timing controller. The display panel displays an image. The gate driver outputs a gate signal to the display panel. The data driver includes a plurality of data driving chips which outputs data voltages to the display panel based on data signals. The timing controller adjusts a waveform of the data signals based on a temperature of the data driving chips.