Print Head With Integrated Sound Emitter For Defect Notification
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Solution Overview
Problem
Existing printing devices, such as ink jet printers, face issues with deteriorating image quality due to defects in the print head, and existing inspection systems often fail to notify users of these defects effectively as the notification devices are external to the print head.
Innovation Solution
A print head configuration that includes a generation portion for drive signals, an ejection portion for ink, a supply portion for switching drive signals, and a sound emitting portion, where switches are exclusively turned on to amplify signals and emit sound, allowing for internal determination and notification of defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If notification device is provided outside the print head, then device complexity is reduced, but reliability of defect notification deteriorates because the notification device cannot acquire the inspection result
Solution Approach 1:
The notification device is merged with the print head by integrating the sound emitting portion and light emitting portion directly into the print head structure. This allows the notification device to reliably acquire and transmit inspection results while maintaining a compact integrated design.
Solution Approach 2:
The patent introduces an inspection circuit as an intermediary component within the print head that acquires inspection results and transmits them to notification devices. This intermediary ensures reliable information transfer between the inspection system and external notification systems.
2Power
If first switch and second switch are turned on simultaneously, then signal amplification is maximized, but harmful factors increase due to signal interference and potential damage to driving elements
Solution Approach 1:
The first switch and second switch are operated periodically and exclusively, where one switch is on while the other is off, and they alternate in sequence. This periodic switching provides sufficient signal amplification for both the ejection portion and sound emitting portion while preventing signal interference and potential damage that would occur with simultaneous activation.
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 configuration enables accurate acquisition and notification of print head defects, reducing the likelihood of unnoticed issues and improving user recognition of defects within the print head, even if external signals are disrupted.
Implementation Method 1
an ejection portion (D[m]) that includes a first driving element (PZ[m]), and is driven by a drive signal (Com-P)
Implementation Method 2
a sound emitting portion that includes a second driving element (PZ[m]), and is driven by a drive signal (Com-P)
Data Source
AI summary
A print head includes a generation portion that amplifies an input signal to generate a drive signal, an ejection portion that includes a first driving element driven by a drive signal, and ejects a liquid in response to the drive of the first driving element, a supply portion that includes a first switch for switching between supply and non-supply of the drive signal to the first driving element, and a sound emitting portion that includes a second driving element driven by the drive signal, and a second switch for switching between supply and non-supply of the drive signal to the second driving element, and emits sound in response to the drive of the second driving element, in which the first switch and the second switch are turned on exclusively.