Invention Grant
- Patent Title: Printhead integrated circuit having sensing and test circuitry
- Patent Title (中): 具有感测和测试电路的打印头集成电路
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Application No.: US12697273Application Date: 2010-01-31
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Publication No.: US07918524B2Publication Date: 2011-04-05
- Inventor: John Robert Sheahan , Mark Jackson Pulver , Brian Christopher Morahan , Alireza Moini , Timothy Peter Gillespie , Michael John Webb , Kia Silverbrook
- Applicant: John Robert Sheahan , Mark Jackson Pulver , Brian Christopher Morahan , Alireza Moini , Timothy Peter Gillespie , Michael John Webb , Kia Silverbrook
- Applicant Address: AU Balmain, New South Wales
- Assignee: Silverbrook Research Pty Ltd
- Current Assignee: Silverbrook Research Pty Ltd
- Current Assignee Address: AU Balmain, New South Wales
- Main IPC: B41J29/38
- IPC: B41J29/38
Abstract:
A printhead IC is provided having ejection nozzles, drive circuitry for sending drive pulses to resistive heaters of the nozzles to cause ejection from the nozzles, sensing circuitry being activated to sense the temperature of the printhead IC and adjust the profile of the sent drive pulses in accordance with the sensed temperature and being de-activated after a period of use, and test circuitry for selectively disabling the resistive heaters when they receive the drive pulses while comparing the resistance of the resistive heaters against a predetermined threshold to assess whether the resistive heaters are defective.
Public/Granted literature
- US20100134554A1 PRINTHEAD INTEGRATED CIRCUIT HAVING SENSING AND TEST CIRCUITRY Public/Granted day:2010-06-03
Information query
IPC分类:
