E-Paper Color Region Refresh for Low-Cost Multi-Color Updates
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Solution Overview
Problem
Existing electronic paper screens face challenges in achieving more than four colors without increasing cost due to the limitations of driver ICs, leading to inefficiencies in display content updating and higher costs for 3-bit driver ICs.
Innovation Solution
A method and apparatus that identifies color regions and types in multi-color images, converts them into refresh image data and instructions, and executes these asynchronously to improve processing efficiency and accuracy, allowing 2-bit driver ICs to display more colors by optimizing refresh operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a 3-bit driver IC is used to display more than four colors, then the display color capability is improved, but the cost increases significantly
Solution Approach 1:
The patent segments the color display task into multiple sequential refresh operations. Instead of requiring a 3-bit driver IC to handle all color combinations simultaneously, the system divides the color space into multiple subsets that can be displayed through sequential refresh cycles. This allows a 2-bit driver IC to achieve multi-color display capability by refreshing different color subsets in different time slots, effectively segmenting the color rendering function across time rather than requiring higher bit-width hardware.
2Adaptability or versatility
If the number of colors displayed by electronic paper film is increased, then the display effect is improved, but the driver IC complexity and cost increase
Solution Approach 1:
The patent employs periodic refresh actions to achieve multi-color display. The driver IC performs sequential refresh operations at different time periods, where each refresh cycle displays a subset of colors. By periodically refreshing different color subsets in a cyclic manner, the system creates the perception of multi-color display over time. This periodic action allows a simple 2-bit driver IC to achieve the functionality of a more complex multi-color driver through time-multiplexed refresh operations.
3Productivity
If traditional refresh methods are used for multi-color images, then the implementation is simple, but the display content updating speed is slow
Solution Approach 1:
The patent segments the multi-color image refresh operation into multiple targeted sub-operations. Instead of refreshing the entire image uniformly, the system identifies different color regions and applies targeted refresh operations to specific regions that require color updates. This segmentation of the refresh task into region-specific operations significantly improves display content updating speed by avoiding unnecessary refreshes in regions that don't require color changes, while maintaining manageable operational complexity through automated region identification.
Solution Approach 2:
The patent applies local quality by performing differentiated refresh operations on different regions of the display. Rather than applying a uniform refresh strategy across the entire screen, the system analyzes color regions and applies appropriate refresh operations locally to each region based on its specific color requirements. This local optimization improves overall refresh efficiency by concentrating computational resources on regions that need updating while skipping stable regions, thereby increasing display content updating speed without proportionally increasing overall system complexity.
Data Source
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AI summary
Provided are a display content updating method and apparatus, a device, and a medium, relating to the field of screen display technologies. The display content updating method includes: acquiring a color region included in a multi-color image and a color type corresponding to the color region; converting the multi-color image into multiple pieces of refresh image data and refresh instructions corresponding to the multiple pieces of refresh image data according to positions and color types of color regions in the multi-color image, where different refresh instructions are executed asynchronously; and sending the refresh instructions and the multiple pieces of refresh image data to a controller of an electronic paper screen so that the controller refreshes the display content of the electronic paper screen based on the refresh instructions and the corresponding multiple pieces of refresh image data.