Adjustable LED Array Emulating Display Lighting Profiles
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Solution Overview
Problem
Large format printing devices face challenges in ensuring print quality and color correctness due to differences between printing and display lighting conditions, as standard illumination systems fail to emulate the lighting profiles of the intended display environment.
Innovation Solution
A multi-colored array of lighting elements within a printing device that can be adjusted to emulate various lighting profiles, including outdoor and indoor conditions, using a control device to alter emission characteristics to match a target lighting profile, ensuring accurate representation of the final print job.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a standard illumination system is used, then the device complexity is reduced, but the lighting profile cannot match the display environment conditions
Solution Approach 1:
The illumination system uses adjustable LED arrays with varying color temperatures (e.g., 2000K, 5000K, 10000K) that can be dynamically configured to match different display lighting conditions. The system transitions from static standard illumination to dynamic adaptive illumination, allowing the lighting profile to be changed based on the intended display environment.
Solution Approach 2:
The system changes the parameters of the illumination source by using multiple LED types with different color temperatures and spectral characteristics. By adjusting the intensity and color temperature parameters of the LEDs, the system can emulate various lighting conditions (indoor, outdoor, shaded, direct sunlight) without requiring completely different illumination systems.
2Manufacturing precision
If lighting conditions in the printing environment are used, then the inspection process is simplified, but the color correctness under display conditions cannot be ensured
Solution Approach 1:
The system creates a copy of the intended display lighting conditions within the printing environment. By using LED arrays that can emulate the spectral characteristics and color temperature of the target display environment, the system allows operators to inspect prints under conditions that replicate what the final product will experience, ensuring color accuracy without leaving the printing facility.
Solution Approach 2:
The illumination system is configured in advance to match the specific display environment where the print will be viewed. Before final inspection or approval, the lighting is adjusted to the target profile (e.g., outdoor daylight, indoor fluorescent), allowing operators to preliminarily verify color correctness under the actual display conditions that will be encountered.
3Measurement precision
If multiple lighting profiles are emulated, then the quality verification accuracy is improved, but the time required for inspection increases
Solution Approach 1:
The system implements periodic switching between different lighting profiles during the inspection process. Operators can quickly cycle through various lighting conditions (indoor, outdoor, shaded) to verify print quality under each scenario. This periodic action allows comprehensive verification without requiring separate inspection sessions for each lighting condition.
Solution Approach 2:
A single illumination system is designed to perform multiple functions by emulating various lighting profiles. The same LED array can be configured to represent different lighting environments (indoor fluorescent, outdoor daylight, shaded areas), eliminating the need for multiple separate light sources and allowing versatile quality verification within one system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system allows for the identification of defects and ensures color correctness by simulating different lighting conditions, allowing for quality verification before completion and ensuring the print job appears as intended under its display lighting.
Implementation Method 1
A multi-colored array of lighting elements within a printing device that can be adjusted to emulate various lighting profiles
Implementation Method 2
using a control device to alter emission characteristics to match a target lighting profile
Data Source
AI summary
In one example in accordance with the present disclosure a print media lighting system is described. The system includes a multi-colored array of lighting elements to illuminate a print media as the print media passes through an illumination zone of a printing device. The multi-colored array of lighting elements are alterable based on a target lighting profile. The system also includes a control device electrically coupled to the multi-colored array of lighting elements. The control device alters emission characteristics of the lighting elements to adjust an actual lighting profile towards the target lighting profile.