Display Device Data Driving Unit Glitch Filtering
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Solution Overview
Problem
Display devices face errors in driving the data driving unit due to noise during signal transmission from the signal control unit to the data driving unit, affecting the reliability of image display.
Innovation Solution
A display device with a signal control unit that outputs a gate driving signal, clock signal, and image data, including a filtering unit to generate a second frequency control signal by analyzing the first frequency control signal for glitches, and a clock training unit to generate an internal clock signal for converting image data to data voltages, ensuring reliable data transmission and image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first frequency control signal is transmitted directly from the signal control unit to the data driving unit, then the transmission is simple and fast, but noise or glitches may occur during transmission affecting driving reliability
Solution Approach 1:
The patent introduces a filtering unit as an intermediary component within the data driving unit that processes the first frequency control signal before it reaches the clock training unit. This filtering unit removes noise and glitches from the signal, thereby improving driving reliability without requiring changes to the signal control unit or transmission interface.
Solution Approach 2:
The signal processing function is segmented into distinct units: a filtering unit for noise removal and a clock training unit for internal clock generation. This segmentation allows the filtering operation to be performed independently on the control signal without affecting the main data transmission path, resolving the contradiction between reliability improvement and system complexity.
2Reliability
If a filtering unit is added to remove noise from the frequency control signal, then driving reliability is improved, but the device complexity increases
Solution Approach 1:
The filtering unit serves as an intermediary between the interface receiving unit and the clock training unit, isolating the noise filtering function from the main signal processing path. This allows the data driving unit to handle noisy signals reliably without requiring complex error correction mechanisms throughout the entire system.
Solution Approach 2:
The filtering unit performs preliminary cleaning of the frequency control signal before it reaches the clock training unit. By removing noise and glitches in advance, the clock training unit receives a clean signal and can generate accurate internal clock signals without needing to implement complex noise tolerance mechanisms.
Data Source
AI summary
A display device according to an embodiment of the inventive concept includes a data driving unit, a gate driving unit, a signal control unit for controlling driving of the data driving unit and the gate driving unit, and a display panel. The data driving unit generates an internal clock signal for outputting data voltages corresponding to image data, and the display panel displays an image corresponding to the data voltages in response to a gate driving signal outputted from the gate driving unit. The data driving unit includes a filtering unit for converting a first frequency control signal received from the signal control unit so as to generate a second frequency control signal, and a clock training unit for training a clock signal received from the signal control unit so as to generate the internal clock signal in response to the second frequency control signal.