Display Driver Noise Isolation via Blank Pattern Segmentation
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Solution Overview
Problem
Display panel driving is affected by high voltage noise, which can lead to abnormal operations and failure in receiving important control data packets, resulting in unstable display panel operation.
Innovation Solution
A display driving device and display device configuration that includes a timing controller transmitting a communication signal with a blank pattern and line data at horizontal line intervals, where a configuration packet is included and positioned at the end of the blank pattern to restore and drive the display panel, and a source driver restores the blank pattern and line data to mitigate high voltage noise effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the source driver drives the display panel at horizontal line intervals, then the display panel can be driven efficiently, but high voltage noise is generated periodically affecting low-voltage circuits
Solution Approach 1:
The communication signal is segmented into distinct portions: a blank pattern transmitted during the horizontal blank period and line data transmitted during the active period. This segmentation allows the configuration packet to be isolated in the blank pattern portion, separating it from the data transmission path and protecting it from high voltage noise generated during active driving.
Solution Approach 2:
The configuration packet is transmitted in advance during the horizontal blank period before the active display period begins. This preliminary transmission ensures that control data is received and processed before the high voltage noise generation starts when the source driver begins driving the display panel at horizontal line intervals.
2Speed
If the configuration packet is transmitted during the active period, then data communication speed is improved, but the packet may be affected by high voltage noise
Solution Approach 1:
The configuration packet is transmitted in advance during the horizontal blank period before the active display period begins. This preliminary transmission ensures that control data is received and processed before the high voltage noise generation starts when the source driver begins driving the display panel.
Solution Approach 2:
The transmission is scheduled during the horizontal blank period, which is a periodic interval between horizontal line scans. This utilizes the natural periodic structure of display scanning to allocate specific time windows for configuration data transmission when the system is between active scanning operations.
Data Source
AI summary
The present disclosure discloses a display driving device and a display device including the same, which enable the influence of high voltage noise to be avoided in display panel driving. The display device includes a timing controller configured to transmit a communication signal, which includes a blank pattern and line data, at a horizontal line interval, and a source driver configured to restore the blank pattern and the line data in the communication signal and drive a display panel using the blank pattern and the line data. The timing controller may include a configuration packet in the blank pattern and position the configuration packet in an end period of the blank pattern.