Image Signal Transfer Between LCD and E-Paper Displays
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Solution Overview
Problem
LCD and e-paper displays exhibit different image display qualities due to their distinct physical materials and light source operating principles, making it challenging to translate image characteristics such as luminance and chrominance effectively between the two.
Innovation Solution
An image transfer apparatus comprising transfer units that adjust image signals based on gamma values associated with each display type to ensure identical or similar image characteristics are maintained across different displays, utilizing a combination of first, second, and third transfer units to process signals for optimal luminance and chrominance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If image signals are transferred directly between LCD and e-paper displays without transformation, then the transfer process is simple, but the image characteristics such as luminance and chrominance do not translate well between the two display types
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing gamma values and transfer gain functions for different display types. Before actual image transfer, the system determines the appropriate gamma values (first gamma value for LCD, second gamma value for e-paper) and transfer gain functions based on the source and target display characteristics. This preparation enables accurate image characteristic translation during the transfer process without real-time complex calculations.
Solution Approach 2:
The patent implements parameter changes by transforming image signals through gamma value adjustment and transfer gain function application. The system changes key parameters including luminance levels, chrominance values, and signal intensity distributions to match the target display's characteristics. This involves applying different gamma corrections and scaling factors to adapt the image signal from one display type to another.
2Manufacturing precision
If gamma values and transfer gain functions are applied to transform image signals, then image characteristics are accurately translated, but the processing time and computational resources increase
Solution Approach 1:
The patent reduces processing time by performing preliminary calculations of gamma values and transfer gain functions. The system pre-determines the appropriate transformation parameters based on the source and target display types, storing these for quick retrieval during image transfer. This eliminates the need for real-time complex calculations while maintaining accurate luminance and chrominance matching.
Solution Approach 2:
The patent uses lookup tables and pre-computed transfer functions that act as copies of optimal transformation data. Instead of calculating gamma corrections and transfer gains from scratch for each image transfer, the system retrieves pre-established transformation parameters that have been optimized for specific display type combinations, significantly reducing computational overhead and processing time.
Data Source
AI summary
An image transform apparatus for displaying image characteristics of a second display on a first display includes a first transform unit, for transforming a first image signal of the first display to a first output signal according to a second gamma value associated with the second display; a second transform unit, for transforming the first output signal to a second output signal according to a transform gain function associated with the first display and the second display; and a third transform unit, for transforming the second output signal to a second image signal according to a first gamma value associated with the first display.