JPH04279873A - Existing magnetic field tolerance measurement device in display monitor - Google Patents

Abstract

PURPOSE:To omit the extraction or exchange of posistors, and to make the measurement of existing magnetic field tolerance safe and easy by connecting a plurality of posistors to a monitor power source through an attachment/ detachment type connector, so as to automatically switch each posistor. CONSTITUTION:A lead line 6 and a degaussing coil 9 in a monitor 7 are connected with each other, and a plurality of posistors 4 of the same structure as the posistor in the monitor are fixed to an attachment/detachment type connector 2. At the time of measurement, a switch 5 is turned ON, and a stepping relay 1 is operated thereby, while a power source supply control circuit 11 is operated in order based on the output of the relay 1, and the posistors 4 are operated in order. The posistor 4 in operation is displayed by a LED 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic field tolerance measuring device for display monitors used in evaluation tests of display monitors.

0002

2. Description of the Related Art FIGS. 3 and 4 show a partial circuit diagram and an external view of a conventional display monitor magnetic field tolerance measuring device. In the figures, 4 is a POSISTOR, 6 is a lead wire, and 7 is a measurement monitor. , 8 is a connector, and 9 is a degauss coil inside the monitor.

In the above configuration, in order to measure the magnetic field tolerance of the display monitor, the POSISTOR 4 inside the monitor 7 is taken out with the lead wire 6 as shown in the figure, and the taken out POSISTOR 4 is inserted into the connector 8 to measure the magnetic field tolerance. It is designed to measure the degree of

0004

[Problems to be Solved by the Invention] However, depending on the conventional measurement method described above, it is difficult to
It is difficult to take out the POSISTOR 4, and during measurement, the POSISTOR 4 generates heat due to the application of a magnetic field and the resistance value changes significantly, so it is necessary to replace the POSISTOR. There were problems such as the need to repeatedly insert and re-insert the device.

[0005] The present invention was made to solve the above-mentioned problems, and there is no need to take out the POSISTOR.
Also, there is no need to replace the Posistor every time you make a measurement.
It is an object of the present invention to provide a magnetic field tolerance measuring device for a display monitor that allows easy and safe measurement.

[0006]

[Means for Solving the Problems] A magnetic field tolerance measuring device for a display monitor according to the present invention connects a plurality of POSISTORS to a monitor power supply via a detachable connector, and selects and operates each POSISTOR sequentially. It is equipped with control means.

[0007]

[Operation] In the present invention, the selection control means automatically selects a plurality of POSISTORs to perform POSISTOR operation and facilitate measurement.

[0008]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In both figures, 1 is a stepping relay that sequentially sends output to each output terminal, 2 is a detachable connector, and 3
is an LED, 4 is a POSISTOR, 5 is an operation switch for the stepping relay 1, 6 is a lead wire, 7 is a measurement monitor, 9 is a degauss coil in the monitor, 10 is the main body of the device, and 11 is provided for each POSISTOR 4 that is provided with a plurality of them. This is a power supply control circuit that sequentially controls the supply of monitor power to each POSISTOR 4 based on the output of the stepping relay 1, and a built-in LED lights up during operation.

Next, the operation will be explained. Lead wire 6
and a degauss coil 9 inside the monitor 7, and a plurality of posister 4 having the same configuration as the posister inside the monitor are fixed to the detachable connector 2. The switch 5 is turned on to operate the stepping relay 1, and the power supply control circuit 11 operates sequentially based on the output of the stepping relay 1, thereby sequentially operating the POSISTOR 4. displayed by.

Therefore, according to the above-mentioned embodiment, the measurement of the magnetic field tolerance of the display monitor is facilitated by operating the plurality of POSISTERS 4 by automatically selecting them.

[0011] In the above embodiment, there are two types of POSISTORs.
Although the explanation was made using pins, other types of 3-pins may also be used.
The same effects as in the above embodiment are achieved.

0012

As described above, according to the present invention, it is not necessary to take out the Posistors, so the measurement efficiency is improved, and the automatic selection of a plurality of Posistors allows work to be carried out quickly and safely.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a magnetic field tolerance measuring device according to an embodiment of the present invention.

FIG. 2 is an external view of the device in FIG. 1;

FIG. 3 is a partial circuit diagram illustrating a conventional measurement method.

FIG. 4 is an external view of FIG. 3;

[Explanation of symbols]

1 Stepping relay 2 Detachable connector ４　　　　　Posista 7 Measurement monitor 9 Degauss coil 11 Power supply control circuit

Claims (1)

[Claims] 1. A magnetic field tolerance measuring device for a display monitor, which connects a plurality of POSISTORS to a monitor power supply via detachable connectors, and includes selection control means for sequentially switching and selecting each POSISTOR.