Display Controller Bit Shifter for Stain Compensation
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Solution Overview
Problem
Display panels face challenges in maintaining image quality due to stains, which existing technologies fail to compensate effectively, leading to unsatisfactory image display.
Innovation Solution
A driving controller with a bit shifter and stain compensator that determines bit shift values for integer and decimal bits based on the area of the display panel, adjusting grayscale values to generate compensated image data and improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing stain compensation technologies are used, then stain compensation is provided, but the compensation is not fine enough and image quality remains unsatisfactory
Solution Approach 1:
The patent segments the grayscale value compensation into two distinct parts: integer bits and decimal bits. The integer bit compensator handles the integer portion of the compensation value, while the decimal bit compensator handles the fractional portion. This segmentation allows for more precise control over the compensation process, enabling fine-grained adjustment of grayscale values to achieve satisfactory image quality without causing stains.
2Reliability
If bit shift values are increased to compensate for significant stains, then compensation effectiveness improves, but precision for minor stains decreases
Solution Approach 1:
The patent implements a dynamic bit shift value determination mechanism where the bit shift value is selected based on the magnitude of the stain compensation value. For larger compensation values (significant stains), higher bit shift values are used to ensure effective compensation. For smaller compensation values (minor stains), lower bit shift values are used to maintain precision. This dynamic adaptation allows the system to optimize between compensation effectiveness and precision depending on the actual stain severity.
3Device complexity
If uniform bit shift values are used across the display panel, then device complexity is reduced, but the ability to handle varying stain levels in different areas is compromised
Solution Approach 1:
The patent applies local quality by determining bit shift values independently for different areas of the display panel based on local stain characteristics. Rather than using a single uniform bit shift value for the entire panel, the system adjusts the bit shift value according to the specific stain compensation needs of each area. This allows the system to maintain low complexity in the overall design while achieving high adaptability to varying local conditions.
Data Source
AI summary
A controller includes a bit shifter and a stain compensator. The bit shifter may determine a bit shift value corresponding to a stain compensation value according to an area of a display panel. The bit shift value represents a quantity of integer bits and a quantity of decimal bits. At least one of the quantity of integer bits and the quantity of decimal bits corresponds to a quantity of stain compensation steps. The stain compensator may compensate a grayscale value of input image data using the stain compensation value and the bit shift value to generate compensated image data.