LCD Stain Compensation via Mode-Adaptive Voltage Interpolation
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Solution Overview
Problem
Liquid crystal display (LCD) panels often experience stains due to abnormal luminance, which can be either high or low compared to adjacent areas, appearing as horizontal lines, vertical lines, or spots, and existing methods are inadequate in compensating for these issues effectively.
Innovation Solution
A display device is designed with a stain compensator that generates compensating data by selecting from stored stain compensating values and interpolated values based on driving modes, adjusting data voltages to pixels to improve side viewing angles and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single stain compensating value is used for all driving modes, then the device complexity is reduced, but the display quality and stain compensation effectiveness deteriorate
Solution Approach 1:
The patent implements dynamic stain compensation by storing multiple stain compensating values (first, second, and third values) corresponding to different driving modes (first, second, and third modes). The system dynamically selects or interpolates the appropriate compensating value based on the current driving mode, allowing the compensation mechanism to adapt to varying operational conditions while maintaining display quality without excessive complexity
Solution Approach 2:
The patent changes the parameter of stain compensating values based on driving modes. By storing different compensating values for different driving modes and selecting or interpolating between them, the system optimizes stain compensation for each specific operating condition, improving display quality without requiring a completely separate compensation system for each mode
2Manufacturing precision
If multiple stain compensating values are stored for different driving modes, then the display quality is improved, but the device complexity increases
Solution Approach 1:
The patent stores multiple stain compensating values (first, second, and third values) which is more than a single value system, but not a complete separate system for each driving mode. This partial multiplication of compensating values provides sufficient compensation accuracy for different driving modes while avoiding the excessive complexity of implementing fully independent compensation systems for each mode
Solution Approach 2:
The patent creates a universal stain compensation mechanism that handles multiple driving modes through a single integrated system. By storing multiple compensating values and using selection or interpolation logic, the system achieves multi-functionality, providing accurate stain compensation for different driving modes without requiring separate compensation systems for each mode
3Adaptability or versatility
If stain compensating values are interpolated based on driving modes, then the adaptability is improved, but the calculation complexity increases
Solution Approach 1:
The patent changes the interpolating parameter from simple driving mode selection to charging ratio-based interpolation. By using the charging ratio (a continuously varying parameter) as the basis for interpolating between stain compensating values, the system achieves smooth adaptation across different driving conditions while keeping the calculation relatively simple and avoiding complex multi-dimensional interpolation algorithms
4Manufacturing precision
If different data voltages are provided to different pixels based on driving mode, then the display quality is improved, but the data driver complexity increases
Solution Approach 1:
The patent implements dynamic data voltage provision where the data driver provides different data voltages to different pixels based on their specific requirements and the current driving mode. The system dynamically adjusts voltages rather than using fixed voltage assignments, improving display quality while managing data driver complexity through adaptive control
Solution Approach 2:
The patent applies local quality by providing different data voltages to different pixels (first pixel and second pixel) based on their specific characteristics and the current driving mode. Instead of applying a uniform voltage to all pixels, the system tailors the voltage to each pixel's needs, improving overall display quality while the data driver manages the complexity of individualized voltage provision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively compensates for stains by changing stain compensating values according to driving modes and charging ratios, thereby enhancing the display quality of LCD panels.
Implementation Method 1
An electric field is generated by voltages applied to the pixel electrode and the common electrode. By adjusting an intensity of the electric field, the transmittance of light passing through the liquid crystal layer may be controlled
Implementation Method 2
A liquid crystal display (LCD) panel includes a first substrate including a pixel electrode, a second substrate including a common electrode, and a liquid crystal layer between the first substrate and the second substrate
Data Source
AI summary
A display device includes a display panel including a first pixel and a second pixel, a reference gamma generator configured to generate a first reference gamma voltage and a second reference gamma voltage based on a driving mode, a stain compensator configured to output a stain compensating data that compensates a stain of an image data based on the driving mode, and a data driver configured to generate a first data voltage provided to the first pixel based on the first reference gamma voltage and the stain compensating data and a second data voltage provided to the second pixel based on the second reference gamma voltage and the stain compensating data.