Drivers, electro-optical devices, and electronic equipment

The driver corrects voltage differences using a capacitor and correction circuit to stabilize output voltage, addressing the inefficiencies in capacitive driving and reducing power consumption and amplifier circuit size.

JP7868368B2Active Publication Date: 2026-06-02SEIKO EPSON CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
SEIKO EPSON CORP
Filing Date
2022-03-28
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The closer the target voltage in capacitive driving is to the power supply voltage, the more the charge supply ability decreases due to internal resistance, leading to increased time for the voltage to reach the target, and the amplifier circuit must respond quickly, potentially causing large current differences and instability.

Method used

A driver with a capacitor drive circuit, correction circuit, and processing circuit that corrects voltage differences using a correction capacitor to inject or discharge charge, reducing the voltage difference before amplifier drive starts, thereby stabilizing the output voltage.

Benefits of technology

This approach allows for faster and more accurate voltage correction, reducing power consumption and amplifier circuit size by minimizing the voltage difference at the start of amplifier drive.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a driver and the like that can correct the voltage difference between the voltage of a signal supply line and a target voltage caused by the time taken by the voltage of the signal supply line to reach the target voltage.SOLUTION: A driver 100 includes: a data voltage output terminal TVQ; a capacitor driving circuit 20 that outputs first to n-th capacitor driving voltages corresponding to gradation data to first to n-th nodes for driving capacitors; a capacitor circuit 10 that has first to n-th capacitors provided between an output node NVQ and the first to n-th nodes for driving capacitors; a processing circuit 42 that generates a correction signal SGC for correcting the voltage difference between an output voltage VQ and a target voltage corresponding to the gradation data; and a correction circuit 95 that corrects the voltage difference with a correction voltage corresponding to the voltage difference by injecting electric charges corresponding to the correction signal SGC to the output node NVQ or discharging the electric charges from the output node NVQ by using a capacitor circuit for correction.SELECTED DRAWING: Figure 2
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