JP2000149795A - Repairing method of crt by user, and crt display device corresponding with same method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a CRT display device enabling a user to settle a failure of a CRT by high-voltage treatment, in the case of a CRT display. SOLUTION: A high-voltage treatment circuit is mounted within a CRT display device 110, and the device is provided with a switch 114 for controlling it. A user can perform high-voltage treatment of a CRT by pressing the switch 114, and a failure of the CRT due to fine metallic particles deposited on intra- tube electrodes in the CRT can be settled without returning it to the factory.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CRT display device and, more particularly, to minute metal particles (suspension) in a tube which cannot be completely eliminated in the production of a cathode ray tube.
The present invention relates to a CRT user repair method and a CRT display device that enable a user to deal with a CRT defect problem caused by the above problem.

[0002]

2. Description of the Related Art Various unexpected minute metal particles (dust) are present in a tube of a CRT during a manufacturing process. When these dusts adhere to the electrodes in the CRT tube, various problems occur. This dust cannot be completely removed, and defects such as focus blur occur during use at a certain fixed ratio. In this case, the user cannot improve the defect and returns to the manufacturer to request repair.

[0003]

The above-mentioned conventional CRT
The first problem with cathode ray tubes is that in the manufacture of CRTs,
CRT failure is caused by the in-tube minute metal particles that cannot be completely eliminated. The reason is that the fine metal particles in the tube adhere to the electrodes in the CRT due to a large vibration / shock applied to the device, and cause a failure in the CRT that has been operating normally until then. To overcome this drawback, the CRT must be subjected to high pressure processing.

[0004] The second problem is that, even in a device which has once been subjected to high pressure treatment, if a large vibration / shock is applied to the device at the time of movement / installation or the like, fine metal particles in the CRT adhere to the electrodes inside the CRT again, That is, the same problem may recur.

[0005] The reason is that the treatment by high-pressure treatment is performed by CRT.
This is because particles adhered to the internal electrodes are burned off by high-pressure treatment by equipment of a manufacturer's factory, and not all fine metal particles existing in the CRT are removed.

An object of the present invention is to provide a CRT display device which enables a user to solve the above-mentioned CRT failure caused by minute metal particles in the CRT without requiring repair by returning to a factory. It is to be.

[0007]

In order to solve the above-mentioned problems, a user repair method according to the present invention uses a CRT as a CRT.
Disconnecting from the circuit, generating a high voltage, connecting the high voltage to the CRT to burn out the smiling metal particles attached to the internal electrode of the CRT, cutting off the high voltage, and then disconnecting the CRT circuit from the CRT. And a reconnection step. Further, the CRT display device of the present invention has a high voltage generating circuit for generating a high voltage for burning out minute metal particles adhered to the cathode ray tube internal electrode, and a high voltage for instructing the high voltage generating circuit to generate a high voltage. It has a generation instructing means and a disconnecting means for disconnecting the high voltage generating circuit.

[0008] A high voltage is applied between the CRT electrodes by a high voltage processing circuit mounted inside the CRT display to burn off and remove the fine metal particles attached to the electrodes. By doing so, the CRT failure can be eliminated by the user himself. Even if vibration / shock is applied to the device due to the movement of the device or the like and the fine metal particles adhere to the electrodes in the CRT again, the problem can be easily solved by performing the above processing again.

[0009]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 4 is a flowchart of an embodiment of a method for repairing a user of a CRT according to the present invention. This repair method disconnects the CRT display circuit from the CRT by switching on the user (step 11), generates a high voltage (step 12), connects the high voltage to the CRT, and connects the CR to the CRT.
This is the process of burning off the fine metal particles attached to the internal electrode of T (step 13), disconnecting the high voltage from the CRT, and reconnecting the CRT display circuit to the CRT (step 14). One embodiment of the present invention is to use the high voltage generation as a flyback transformer capable of generating the target voltage.

FIG. 1 is a block diagram showing an embodiment of a display device according to the present invention. Referring to FIG. 1, a CRT display device 110 of the present invention includes a CRT 111,
Normal CRT display circuit 112, high-voltage processing circuit 113, control switch 114, and disconnection circuit 115
It is equipped with.

The high voltage processing circuit 113 is connected to the CRT 111 and the control switch 114. Also, the normal display circuit 112 outputs the CR
Connected to T111. The high-pressure processing on the CRT 111 is performed by a high-pressure processing circuit 113.

When a small metal particle adheres to the internal electrode of the CRT 111 and a CRT failure occurs, a control switch 114 connected to the high-pressure processing circuit 113 is depressed. The circuit 112 is disconnected from the CRT 111, and thereafter, the high-voltage processing circuit 113 operates to apply a high voltage between the electrodes of the CRT 111. With this operation, the CRT 11
The fine metal particles adhering to the first internal electrode are burned off, and the CRT failure is eliminated. If for some reason C
When the RT failure occurs again, the above operation is performed again, so that the CRT failure can be easily eliminated.

[0014]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a block diagram of one embodiment of the CRT display device of the present invention. The CRT display circuit is a flyback transformer (hereinafter, referred to as FBT) mounted inside the CRT display device 210.
213, the CRT 211 and the control switch 214 are connected. The FBT 213 mounted on the CRT display device 210 can generate a voltage several times higher than the voltage during normal use, unlike the flyback transformer mounted on a normal display device.

When the control switch 214 is pressed, a normal circuit 212 and a CRT 211 are
Is cut off, and then the CRT 2 is
A high voltage is applied between the eleventh electrodes. By this operation,
The fine metal particles adhering to the internal electrodes of the CRT 211 are burned off, and the CRT failure is eliminated. By providing the FBT 213 with such a function, a CRT having a CRT high-pressure processing function similar to that of the CRT display device 110 is provided.
An RT display device 210 can be provided.

[0017]

As described above, the first effect of the present invention is that a CRT display device has a CR by fine metal particles.
This means that even if a T defect occurs, repair by returning to the factory is unnecessary. The reason is that the CRT display device had to be disassembled at the factory and CRT high-pressure processing had to be performed in the past. Because you can do it.

The second effect is that since it is not necessary to return to the factory, CRT failure due to the adhesion of fine metal particles can be expected to be less likely to recur.

The reason is that, when the CRT display device is moved and the vibration / shock is applied to the CRT display device, the fine metal particles tend to adhere to the electrodes inside the CRT. By eliminating the need, the chances of moving the CRT display device are reduced, and as a result, the chances of CRT failure occurring are reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a CRT display device according to the present invention.

FIG. 2 is a block diagram of one embodiment of a CRT display device of the present invention.

FIG. 3 is a flowchart of a CRT user repair method according to an embodiment of the present invention.

[Explanation of symbols]

 110, 210 CRT display device 111, 211 CRT 112, 212 Normal CRT display circuit 113 High voltage processing circuit 213 FBT (flyback transformer) 114, 214 Control switch 115, .215 Separation circuit

Claims (6)

[Claims] 1. A user repair method for a CRT failure, comprising: a CRT disconnecting step of disconnecting the CRT from the CRT circuit; a high voltage generating step of generating a high voltage; and connecting the high voltage to the CRT and connecting the high voltage to an internal electrode of the CRT. A CRT user repair method, comprising: an incineration step of burning off attached fine metal particles; and a reconnection step of disconnecting high voltage and then reconnecting the CRT circuit to the CRT. , 2. The C according to claim 1, wherein the step of generating a high voltage is performed by a flyback transformer that generates a high voltage to burn out fine metal particles adhering to an internal electrode of a CRT.
RT user repair method. 3. The CRT user repair method according to claim 1, wherein the CRT disconnection step, the high voltage generation step, the incineration step, and the reconnection step are executed as a series of operations when the user switches on. . 4. In a CRT display device, a high voltage generating circuit for generating a high voltage for burning off minute metal particles attached to an electrode in a cathode ray tube, and a high voltage generating instruction for instructing the high voltage generating circuit to generate a high voltage. And a disconnecting means for disconnecting the high voltage generating circuit from another circuit. 5. The CRT display device according to claim 1, wherein the high-voltage generating circuit is a flyback transformer that generates a dedicated high voltage. 6. The CRT display device according to claim 1, wherein the disconnecting circuit is operated by the high voltage generation instructing means, and the high voltage generating circuit is connected to a CRT after confirming the operation of the disconnecting circuit.