Display Driving Controller Time-Based Compensation
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Solution Overview
Problem
Display quality deterioration due to variations in pixel and driving circuit characteristics caused by operation environment factors such as ambient temperature and operation time, leading to non-uniform image display.
Innovation Solution
A display device with a driving controller that includes a timer, memory for storing compensation data, and an image processor to generate compensation signals based on operation time, adjusting data signals and reference voltages to maintain consistent display quality across different operation times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the display device operates for a long period, then the operation time increases, but the pixel and driving circuit characteristics vary leading to degraded display quality uniformity
Solution Approach 1:
The patent applies preliminary action by pre-storing multiple sets of compensation data in the memory, each corresponding to different operation time periods. The compensation data is prepared in advance and selected based on the current operation time, allowing the system to proactively compensate for characteristics that will vary as the display operates over time.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the data driving signal based on the operation time. The control signal generation part selects different compensation data corresponding to different operation time periods and applies them to modify the data driving signal, thereby compensating for the time-dependent variations in pixel and driving circuit characteristics.
2Reliability
If compensation data is stored for multiple operation time periods, then display quality uniformity is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the operation time into multiple discrete periods and storing separate compensation data for each period. This segmentation allows the system to manage time-dependent variations through discrete, manageable data sets rather than requiring complex continuous adjustment mechanisms.
Solution Approach 2:
The patent uses copying by storing multiple copies of compensation data in the memory, where each copy corresponds to a specific operation time period. Instead of creating a complex real-time adjustment system, the patent creates and stores multiple pre-computed compensation profiles that can be quickly retrieved and applied as needed.
Data Source
AI summary
A driving controller of a display device includes a timer which counts an operation time and outputs a count signal, a memory which stores compensation data, a control signal generation part which receives the compensation data from the memory in response to the count signal and outputs a compensation data signal corresponding to the compensation data, and an image processor which converts an image signal into a data signal and outputs the data signal, where the data signal is obtained by combining the image signal and the compensation data signal. The compensation data includes first compensation data corresponding to a first operation time and second compensation data corresponding to a second operation time which is different from the first operation time.