Display Data Signal Compensation via Feedback Monitoring
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Solution Overview
Problem
Display devices experience signal distortion due to voltage drops, particularly as the distance between the signal controller and the data driving circuit increases, leading to intensified image signal distortion.
Innovation Solution
A display device with a monitoring circuit and control circuit that measures signal phase, amplitude, rising time, or falling time using phase and amplitude monitoring circuits, generating feedback signals to compensate for distortion by adjusting the data signals transmitted to the data driving circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the distance between the signal controller and the data driving circuit increases, then the coverage area of the display device can be expanded, but the signal distortion intensifies due to voltage drops
Solution Approach 1:
The patent implements a feedback mechanism where the data driving circuit measures signal characteristics (phase, amplitude, rising time, falling time) and sends measurement results back to the signal controller. The signal controller then adjusts transmission parameters based on this feedback to compensate for signal distortion caused by long transmission distances, thereby maintaining signal quality while enabling larger display areas
Solution Approach 2:
The patent dynamically changes transmission parameters (such as pre-emphasis levels, equalization settings, or clock timing) based on measured signal distortion characteristics. By adjusting these parameters in response to actual signal conditions, the system compensates for voltage drops and distortion that occur over longer transmission distances
2Reliability
If monitoring circuits and feedback mechanisms are added to compensate for signal distortion, then signal quality can be maintained, but device complexity increases
Solution Approach 1:
The monitoring circuit in the data driving circuit serves multiple functions: it measures phase, amplitude, rising time, and falling time of the data signal, and uses these measurements to generate feedback for signal compensation. By consolidating these measurement and feedback functions into a single integrated circuit, the patent reduces overall system complexity while maintaining signal quality
Data Source
AI summary
A display device includes a signal controller and a data driving circuit. The data driving circuit includes a plurality of driving chips. At least one of the driving chips monitors a degree of distortion of a data signal. The at least one of the driving chips generates a feedback signal based on the monitored result to compensate for the distorted data signal.