Asymmetrical bus keeper
US-9209808-B2 · Dec 8, 2015 · US
Element substrate, printhead, and printing apparatus
US8944550B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8944550-B2 |
| Application number | US-201414286098-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 23, 2014 |
| Priority date | May 31, 2013 |
| Publication date | Feb 3, 2015 |
| Grant date | Feb 3, 2015 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A recent inkjet printing apparatus includes a large-capacitance capacitor to stabilize a heater power supply. The presence of this capacitor requires a long time to drop the heater voltage at the time of power shutdown or the like. For this reason, an unwanted heater current may flow during the drop. To solve this problem, in this embodiment, a high voltage logic circuit is provided near a printing element, and a terminal is provided so that a signal can directly be input to this circuit. Heater driving control is performed via the terminal. This makes it possible to reliably control the heater regardless of the logic power supply state even if the logic voltage abruptly drops at the time of power shutdown or the like.
First claim
Opening claim text (preview).
What is claimed is: 1. An element substrate including a plurality of printing elements to which a first voltage is applied, a plurality of driving elements provided in correspondence with the plurality of printing elements and configured to drive the plurality of printing elements, a plurality of logic circuits configured to generate, based on an externally input signal, a selection signal used to select and drive the plurality of printing elements, and a plurality of first level c…
Assignees
Inventors
Classifications
Operations & Transport · mapped topic
- H03K19/017509Primary
Electricity · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
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Frequently asked questions
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- What does patent US8944550B2 cover?
- A recent inkjet printing apparatus includes a large-capacitance capacitor to stabilize a heater power supply. The presence of this capacitor requires a long time to drop the heater voltage at the time of power shutdown or the like. For this reason, an unwanted heater current may flow during the drop. To solve this problem, in this embodiment, a high voltage logic circuit is provided near a prin…
- Who is the assignee on this patent?
- Canon Kk
- What technology area does this patent fall under?
- Primary CPC classification H03K19/017509. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).