Print Control Apparatus Dual-Surface Luminance Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional print control methods fail to ensure that printed matter appears suitable under both reflected and transmitted light conditions, as the brightness and contrast are significantly reduced when observed under reflected light compared to transmitted light.
Innovation Solution
A print control apparatus and method that generate separate print data for the front and back surfaces of a recording medium, with the back surface data representing a higher luminance range and wider color gamut than the front surface data, allowing for enhanced visibility under both lighting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If printed matter is optimized for transmitted light observation, then the color and contrast are good under transmitted light, but the brightness and contrast are greatly reduced when observed under reflected light
Solution Approach 1:
The invention divides the print data into two separate sets: first print data optimized for reflected light observation and second print data optimized for transmitted light observation. This segmentation allows each surface to be independently optimized for its intended viewing condition, resolving the contradiction between appearance quality under different lighting conditions.
Solution Approach 2:
The invention applies different luminance ranges and color gamuts to different surfaces of the recording medium. The first surface uses first print data with specific luminance characteristics for reflected light viewing, while the second surface uses second print data with higher luminance range and wider color gamut for transmitted light viewing. This local differentiation ensures optimal appearance quality for each viewing condition.
2Illumination intensity
If the second print data represents a higher luminance range, then the appearance under transmitted light is enhanced, but the device complexity increases due to separate generation units
Solution Approach 1:
The print control apparatus is designed to perform multiple functions through its first and second generation units. These units not only generate separate print data for different surfaces but also optimize luminance ranges and color gamuts for different viewing conditions. This multi-functionality justifies the increased device complexity by delivering superior appearance quality under both reflected and transmitted light conditions.
Data Source
AI summary
A print control apparatus that realizes printed matter that appears suitably in a case of observation by reflected light and in a case of observation by transmitted light is disclosed. The print control apparatus, based on data of a source image, generates first print data to be used for printing to a first surface of a recording medium. The print control apparatus also, based on data of the source image, generates second print data that is used for printing to a second surface that is different to the first surface and that represents a higher luminance range, in a luminance range that the data of the source image represents, than a luminance range that the first print data represents.