Liquid Discharge Head Control for High-Nozzle Signal Segmentation

Solution Overview

Problem

Existing liquid discharging apparatuses face delays and processing inefficiencies when the number of nozzles increases, leading to incomplete processing within predetermined time due to increased processing demands on the head control portion.

Innovation Solution

A liquid discharging apparatus with a first and second control circuit system that includes a first and second drive circuit, a first and second substrate, and a first discharging head with a switching circuit, which allows for controlled operation based on state information signals to manage drive signal supply to the discharging portion, preventing abnormality-induced delays.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the number of nozzles is increased to improve discharge accuracy and speed, then the processing load on the head control portion increases, but this causes operational delays and inability to complete processing within predetermined time

Engineering Contradiction:

Improvedischarge accuracy and speedVSAvoidoperational delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The control system is divided into two independent control circuits: a first control circuit that generates base drive signals and discharge control signals, and a second control circuit that receives state information and generates final drive signals. This segmentation allows parallel processing of control tasks, reducing the processing load on any single control portion and eliminating operational delays while maintaining the ability to control increased numbers of nozzles

Inventive Principle:

Principle #1Segmentation

2Productivity

If the number of nozzles is increased to improve discharge accuracy and speed, then more processing is required, but this increases device complexity

Engineering Contradiction:

Improvedischarge accuracy and speedVSAvoidcontrol processing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The control system is divided into two independent control circuits: a first control circuit that generates base drive signals and discharge control signals, and a second control circuit that receives state information and generates final drive signals. This segmentation allows parallel processing of control tasks, reducing the processing load on any single control portion and eliminating operational delays while maintaining the ability to control increased numbers of nozzles

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The second control circuit performs multiple functions: it receives state information signals indicating the state of the liquid discharging apparatus, determines whether abnormalities are present, and generates appropriate drive signals or inhibition signals accordingly. This multi-functionality consolidates control logic and reduces overall system complexity despite handling increased nozzle counts

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12594758B2Liquid discharging apparatus

Publication Date: 2026.04.07 SEIKO EPSON CORP

AI summary

A liquid discharging apparatus includes: a first drive circuit outputting a first drive signal based on the second base drive signal; and a first discharging head including a first discharging portion and a first switching circuit, in which when the state information signal does not include information indicating an abnormality in a state, the second control circuit outputs the second discharge control signal based on the first discharge control signal, and when the state information signal includes the information indicating an abnormality in the state, the second control circuit outputs the second discharge control signal for controlling the first switching circuit not to supply the first drive signal to the first discharging portion.