Parallel Output Terminal Selection for Multi-Substrate Signal Accuracy
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Solution Overview
Problem
In devices with multiple element substrates, the increased number of terminals for temperature detection elements leads to larger and more costly recording devices, and common connection of output terminals results in inaccurate voltage output due to voltage collisions in wiring.
Innovation Solution
A configuration where the output terminals of element substrates are connected in parallel through a signal output unit, with selection units on each substrate to manage signal states and output them to a common terminal, reducing the number of terminals and preventing voltage collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If output terminals of temperature detection elements are individually provided for each substrate, then accurate signal output is maintained, but the number of terminals increases causing device size and cost increase
Solution Approach 1:
Multiple output terminals from different element substrates are merged into a common output terminal through parallel connection. The selection unit enables multiple substrates to share the same output terminal by controlling signal paths, allowing accurate signal output from any substrate without requiring individual output terminals for each substrate.
Solution Approach 2:
The common output terminal serves multiple functions by receiving signals from multiple element substrates through the selection unit. This universal output terminal can be used for temperature detection from any substrate, eliminating the need for separate dedicated output terminals for each substrate while maintaining measurement accuracy.
2Device complexity
If output terminals of temperature detection elements are connected in common within the recording head, then the number of terminals is reduced, but output voltages from each substrate collide in the commonly connected wiring causing inaccurate voltage output
Solution Approach 1:
The selection unit acts as an intermediary between the element substrates and the common output terminal. It controls the connection state of substrates to the output terminal, preventing simultaneous connection of multiple substrates that would cause voltage collisions. The selection unit mediates signal paths to ensure only one substrate connects to the output terminal at a time.
Solution Approach 2:
The connection state between element substrates and the common output terminal is made dynamic through the selection unit. Substrates can be selectively connected or disconnected from the output terminal based on signal generation states, transforming the static common connection into a dynamic controlled connection that prevents voltage collisions while maintaining low terminal count.
3Measurement precision
If outputs of temperature detection elements are transferred through individual corresponding signal lines, then signal accuracy is maintained, but variations in signal lines cause output values to differ
Solution Approach 1:
Multiple individual signal lines are merged into a single common output terminal through the selection unit. This consolidation eliminates the variations and inconsistencies that arise from multiple separate signal lines, as all substrate outputs are routed through the same common terminal, ensuring consistent output values while reducing the number of signal lines required.
Data Source
AI summary
A device includes a first element substrate and a second element substrate for driving a driving element; a first signal input unit connected to an input terminal of the first element substrate; a second signal input unit connected to an input terminal of the second element substrate; and a signal output unit. Each of the first and second element substrates includes a driving element, a first signal generation unit configured to output a first signal, a second signal generation unit configured to output a second signal, an input terminal, an output terminal, and a selection unit configured to receive a signal from the first and the second signal generation units, select one of a state of the first signal, a state of the second signal, and a high-impedance state on the basis of the selection signal input from the input terminal, and output the state to the output terminal.