Angled Optical Sensor for Transparent Media Detection
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Solution Overview
Problem
Typical printer sensor systems struggle to accurately detect transparent media on transparent liners without pre-printed marks or manual adjustments, leading to potential misalignment and improper printing.
Innovation Solution
A sensor arrangement with a transmitter and receiver configured to detect light deflection as it passes through transparent media, using a tilted light beam and photodiodes or CCDs to differentiate between media and liner, allowing for accurate detection of transparent labels and liners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a typical optical sensor system is mounted in a perpendicular arrangement to detect print media, then the sensor can detect media type by measuring light values, but it cannot accurately detect transparent media on transparent liner without pre-printed marks
Solution Approach 1:
The patent transitions from perpendicular (one-dimensional) sensor mounting to an angled arrangement (introducing a second dimension). By mounting sensors at an angle rather than perpendicular to the media surface, the system creates a geometric configuration that produces detectable light reflections from transparent media edges, enabling detection without pre-printed marks.
Solution Approach 2:
The patent utilizes optical property changes (refraction and reflection characteristics) of transparent media at different orientations. By detecting how light interacts with the media at angled configurations versus perpendicular configurations, the system identifies transparent media based on its optical response characteristics rather than color or pre-printed features.
2Measurement precision
If pre-printed marks or manual changes are added to facilitate detection, then transparent media can be detected, but the process requires additional manual intervention and reduces printing efficiency
Solution Approach 1:
The patent enables transparent media to be detected through its inherent optical properties at angled sensor configurations, without requiring external modifications such as pre-printed marks or manual adjustments. The media's own refractive and reflective characteristics at the angled geometry provide the detection signal, making the system self-sufficient and eliminating manual intervention steps.
3Ease of manufacture
If the sensor arrangement is mounted perpendicular to the media surface, then the setup is simple, but the system cannot detect edges of transparent media without pre-printed marks
Solution Approach 1:
The patent modifies the sensor mounting from a simple perpendicular arrangement to an angled configuration. This dimensional change in mounting geometry creates the necessary optical conditions for edge detection of transparent media while maintaining relative manufacturing simplicity through standardized angled mounting brackets or fixtures.
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
Enables precise registration and proper alignment of transparent media, ensuring accurate printing by detecting the leading and trailing edges of the media, even without pre-printed marks, thus improving printing efficiency and reducing manual intervention.
Implementation Method 1
The sensor arrangement may be configured to detect deflection of the light emitted when a transparent print medium is transported on the transport pathway between the transmitter and the receiver
Data Source
AI summary
A printer that includes systems for detecting transparent medium may include a medium dispenser for transporting print medium along a transport pathway to a print station which receives the print medium. Transmitters and receivers may be positioned on opposite sides of the transport pathway for scanning the print medium with a light beam. The sensor arrangement may be configured to detect deflection of the light beam when a transparent print medium is transported on the transport pathway between the transmitter and the receiver. The results of the scan may be communicated to a controller to facilitate proper print settings.