Adaptive PWM Sequences for Sequential Color Displays
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Solution Overview
Problem
Sequential color display systems face issues with color sequence ordering and duration distribution, leading to visible artifacts such as color separation and pulse-width modulation artifacts, which negatively impact image quality.
Innovation Solution
Adaptive pulse-width modulated sequences are generated by computing a duty cycle based on display color intensities, assigning color cycle orders, and optimizing bitplane states for each display time block, allowing for real-time adjustment of color sequence percentages to improve image brightness and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed color sequence is used in sequential color display systems, then the system structure is simple, but color separation artifacts and pulse-width modulation artifacts become visible, degrading image quality
Solution Approach 1:
The patent applies dynamics by making the color sequence adaptive rather than fixed. The system dynamically adjusts the color sequence based on the duty cycle of the image data, allowing the display to optimize its color presentation for different image content. This resolves the contradiction by introducing controlled complexity that eliminates artifacts while maintaining adaptability.
Solution Approach 2:
The patent changes the parameter of color sequence ordering based on the duty cycle parameter of the image data. By computing the duty cycle and using it to determine the optimal color sequence, the system adapts its behavior to match the image characteristics, thereby eliminating artifacts without requiring overly complex fixed structures.
2Manufacturing precision
If color sequence percentages are optimized for each image, then image quality and brightness improve, but storage requirements and implementation complexity increase
Solution Approach 1:
The patent applies self-service by enabling the display system to automatically compute its own optimal color sequence based on the duty cycle of the incoming image data. The system serves itself by deriving the color sequence parameters from the image characteristics without requiring external optimization or pre-computed lookup tables, thereby improving image quality while keeping implementation relatively simple.
Solution Approach 2:
The patent uses feedback by computing the duty cycle from the image data and using that information to determine the appropriate color sequence. This closed-loop approach allows the system to adapt to different image content dynamically, improving image quality and brightness while avoiding the need for complex pre-computed storage solutions.
3Manufacturing precision
If duty cycle computation is performed for each image, then color sequence optimization is achieved, but processing time increases
Solution Approach 1:
The patent applies partial action by computing only the duty cycle parameter from the image data rather than performing full image analysis. This selective computation approach provides sufficient information for color sequence optimization while minimizing processing time, achieving a balance between optimization quality and computational efficiency.
Data Source
AI summary
Adaptive pulse-width modulated sequences for sequential color display systems and methods. A method for displaying an image comprises receiving the image, computing a duty cycle for the image, generating a color sequence based on the computed duty cycle, and displaying the image using the color sequence. The generating comprises assigning a color cycle order to display time blocks in the color sequence, and assigning bitplane states for each display time block in the color sequence.