Display Driving Control Using Offset LUTs for Luminance Stability
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Solution Overview
Problem
Existing display technologies face challenges in maintaining display quality when driving voltages change, leading to issues such as color distortion and luminance instability.
Innovation Solution
A display device with a driving controller that generates data signals based on offset look-up tables, considering changes in driving voltages and panel characteristics, to compensate for variations in luminance and voltage differences, thereby improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If driving voltage is reduced to reduce power consumption, then power consumption is reduced, but display quality deteriorates due to luminance instability and color distortion
Solution Approach 1:
The system performs preliminary characterization of the display panel to determine offset voltages for different driving voltage levels and luminance settings. Offset look-up tables are pre-generated based on these characteristics, enabling the driving controller to compensate for voltage-induced display quality variations without requiring real-time adjustments during operation
Solution Approach 2:
The system dynamically adjusts data signal parameters (specifically offset voltages) based on changes in driving voltage levels and luminance settings. By modifying the data signal characteristics according to the specific operating conditions, the system maintains consistent display quality across different power consumption states
2Illumination intensity
If driving voltage changes to adjust luminance, then luminance is adjusted, but display quality deteriorates due to color distortion and luminance instability
Solution Approach 1:
The system incorporates feedback mechanisms where the driving controller continuously monitors driving voltage levels and luminance settings, then retrieves appropriate offset compensation values from pre-generated look-up tables. This closed-loop approach ensures that any voltage-induced display quality degradation is automatically compensated
Solution Approach 2:
Offset compensation values are pre-calculated and stored in look-up tables based on the display panel's characteristics at various voltage and luminance conditions. This preliminary preparation enables rapid compensation without real-time computation, maintaining display quality during luminance adjustments
Data Source
AI summary
A display device may include a display panel including a pixel, a data driver configured to apply a data voltage based on a data signal to the pixel, a voltage generator configured to generate driving voltages based on a voltage generation control signal and a driving controller configured to generate the data signal and control the data driver and the voltage generator. The pixel may emit light at a setting grayscale based on the driving voltages and the data voltage. At least one driving voltage of the driving voltages may be changed based on a setting luminance. The data signal may be generated based on a change of the at least one driving voltage and a voltage difference between a data voltage of a reference grayscale and a data voltage of the setting grayscale.