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公开(公告)号：DE69015438T2
公开(公告)日：1995-07-13
申请号：DE69015438
申请日：1990-05-14
Applicant: IBM
Abstract: A CRT heater circuit for a CRT display is described, the circuit comprising control means (4) for dynamically varying a voltage (Vh) across the cathode heater in response to variations in the beam current density (I) within the CRT. In this way the optimum voltage across the heater coils is maintained, thus preventing "cathode stripping" at times of peak beam currents, and optimising the CRT's working lifetime.
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公开(公告)号：DE69015438D1
公开(公告)日：1995-02-09
申请号：DE69015438
申请日：1990-05-14
Applicant: IBM
Abstract: A CRT heater circuit for a CRT display is described, the circuit comprising control means (4) for dynamically varying a voltage (Vh) across the cathode heater in response to variations in the beam current density (I) within the CRT. In this way the optimum voltage across the heater coils is maintained, thus preventing "cathode stripping" at times of peak beam currents, and optimising the CRT's working lifetime.
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公开(公告)号：GB2232044A
公开(公告)日：1990-11-28
申请号：GB8911656
申请日：1989-05-20
Applicant: IBM
Abstract: A CRT heater circuit for a CRT display is described, the circuit comprising control means (4) for dynamically varying a voltage (Vh) across the cathode heater in response to variations in the beam current density (I) within the CRT. In this way the optimum voltage across the heater coils is maintained, thus preventing "cathode stripping" at times of peak beam currents, and optimising the CRT's working lifetime.
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