Indicia Reading Illumination Control for Display Interference
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Solution Overview
Problem
Indicia reading apparatuses face challenges in efficiently reading decodable indicia, particularly on displays, due to illumination interference and varying substrate types, which affect image quality and power consumption.
Innovation Solution
The apparatus employs an illumination assembly that is de-energized during exposure periods when reading indicia on displays and energized intermediate exposure periods to reduce noise and induce high brightness mode, and can switch configurations based on sensed conditions to optimize reading on different substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the illumination assembly is energized during exposure periods to illuminate the target, then the reading capability is improved, but illumination interference on displays increases and image quality deteriorates
Solution Approach 1:
The illumination assembly operates in periodic cycles, being energized during pre-exposure periods to illuminate the target and de-energized during exposure periods to prevent interference. This periodic on-off operation allows the system to achieve both illumination and interference-free imaging at different times in the cycle.
Solution Approach 2:
The illumination assembly is energized in advance during pre-exposure periods before the actual exposure begins. This preliminary illumination prepares the target by inducing high brightness mode on displays, ensuring optimal reading conditions are established before the image capture starts, so that when exposure occurs, no additional illumination is needed.
2Manufacturing precision
If the illumination assembly is de-energized during exposure periods to reduce illumination interference, then image quality is improved, but power consumption is reduced while reading capability may be affected
Solution Approach 1:
The system uses periodic illumination cycles where the assembly is de-energized during exposure periods to capture high-quality images without interference, and energized during intermediate periods to maintain readiness and induce high brightness mode on displays, optimizing the balance between image quality and power consumption.
3Ease of operation
If the apparatus uses fixed illumination configuration to simplify operation, then ease of operation is improved, but adaptability to different substrates deteriorates
Solution Approach 1:
The apparatus dynamically adjusts its illumination configuration based on detected substrate characteristics. The system transitions from a fixed configuration to a dynamic one where illumination timing and intensity are automatically modified according to whether the substrate is a display, paper, or other material, maintaining ease of operation while achieving substrate-specific optimization.
Solution Approach 2:
The system incorporates substrate detection feedback that analyzes the target material properties and automatically adjusts the illumination assembly's operation accordingly. This feedback mechanism allows the apparatus to adapt its illumination strategy for different substrates without requiring manual configuration, thus maintaining operational simplicity while enhancing versatility.
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 approach improves image quality by reducing illumination interference on displays and conserves power, while dynamically adapting to different substrates for enhanced reading performance.
Implementation Method 1
an illumination assembly for projection of an illumination pattern... an imaging assembly including an image sensor array and an imaging lens assembly for focusing an image of a target onto the image sensor array
Data Source
AI summary
There is set forth herein an indicia reading apparatus having a configuration in which an illumination assembly for projecting an illumination pattern is de-energized during subsequent exposure periods. In one embodiment the indicia reading apparatus includes a configuration in which the illumination assembly is energized intermediate of the exposure periods. The indicia reading apparatus is useful for reading decodable indicia that is displayed on a display.