Display Panel Driving Device Data Compensation for Charging Time
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Solution Overview
Problem
The dual gate driving architecture for liquid crystal display panels, which doubles the number of gate lines and halves the data writing time, results in insufficient charging time for sub-pixels with polarization reversal, leading to light and dark striped patterns or grid phenomena due to data delay.
Innovation Solution
A driving device and method that includes a judging parameter look-up module, drive data storage module, compensation parameter look-up module, and data buffering module to determine and compensate for data delays by looking up and buffering compensation drive data from pre-stored tables, ensuring adequate charging time for sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the number of gate lines is doubled in dual gate driving architecture, then the number of source chips is reduced and manufacturing cost decreases, but the data writing time is halved causing insufficient charging time for liquid crystals
Solution Approach 1:
The patent stores drive data in advance in a data storage unit before it is needed. When a row is skipped, the pre-stored data is retrieved and output without waiting for real-time generation, thereby compensating for the reduced charging time caused by doubled gate lines while maintaining the dual gate driving architecture's manufacturing cost benefits.
2Productivity
If the number of gate lines is doubled, then productivity increases through faster data writing, but light and dark striped patterns or grid phenomena occur due to data delay
Solution Approach 1:
The patent introduces a control unit and data storage unit as intermediaries between the data generation source and the display panel. The control unit manages row skip signals and coordinates with the data storage unit to retrieve pre-stored drive data, ensuring that data is output at the correct timing even when rows are skipped. This intermediary mechanism maintains display quality by preventing data delay artifacts while preserving the high productivity benefits of doubled gate lines.
3Loss of energy
If rows are skipped during display, then power consumption decreases, but data timing becomes misaligned causing display artifacts
Solution Approach 1:
The patent implements a feedback mechanism where the control unit receives row skip signals and uses them to control the retrieval and output timing of drive data from the data storage unit. When a row skip is detected, the control unit adjusts the data output timing accordingly, ensuring that the displayed information remains synchronized and accurate even though power consumption is reduced through row skipping.
Data Source
AI summary
The present application provides a driving device, a driving method and a display device of a display panel. Whether the received M-th drive data of the current row drive data needs to be compensated for or not is determined. When the compensation is needed, the M-th data of the current row drive data needing to be compensated for is compensated through the corresponding compensation drive data looked up according to the M-th drive data of the previous row drive data and the M-th drive data of the current row drive data.