Output Timing Controller Synchronizes Driving Voltages for LCD Data Drivers
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Solution Overview
Problem
Large liquid crystal display panels face display quality deterioration due to time intervals in driving voltages from multiple voltage generators, causing damage to data drivers and uneven image timing on left and right sides.
Innovation Solution
A driving device with an output timing controller that synchronizes driving voltages from multiple generators to produce a unified third driving voltage, ensuring synchronized operation of data drivers and preventing reverse electric potential damage by applying gamma voltages after the driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple voltage generators are used to drive large liquid crystal display panels, then the driving voltage output is sufficient, but time intervals are generated between driving voltages causing display quality deterioration and data driver damage
Solution Approach 1:
The patent combines multiple driving voltage signals from separate voltage generators into a single unified driving voltage signal through an output timing controller. This merging process synchronizes the voltages and eliminates time intervals, allowing the system to maintain sufficient driving power while ensuring data driver safety by preventing reverse electric potential damage.
2Power
If multiple voltage generators are used to drive large liquid crystal display panels, then the driving voltage output is sufficient, but time intervals are generated between driving voltages causing display quality deterioration
Solution Approach 1:
The output timing controller merges multiple driving voltage signals into one synchronized signal, eliminating time intervals that cause display quality deterioration. This allows the system to maintain sufficient driving power for large panels while achieving uniform image timing and high display quality across the entire panel.
3Device complexity
If gamma voltages are applied before driving voltage to data drivers, then gamma voltage generation is simplified, but reverse electric potential damages the data driver
Solution Approach 1:
The patent applies preliminary action by ensuring the driving voltage is applied to the data driver before the gamma voltage. The output timing controller synchronizes the timing so that the driving voltage reaches the data driver first, establishing a safe voltage baseline before gamma voltages are introduced, thereby preventing reverse electric potential damage while maintaining reliable data driver operation.
Data Source
AI summary
A driving device includes an output timing controller which controls an output timing of a first driving voltage and a second driving voltage respectively generated from a first voltage generator and a second voltage generator. A third driving voltage output from the output timing controller is provided to a first data driver and a second data driver, and also provided to a gamma voltage generator to generate a plurality of gamma voltages. Accordingly, a reverse electric potential between the third driving voltage and the gamma voltages is prevented from being generated in the first and second data drivers, therefore, preventing the first and second data drivers from being damaged.