JP2006180013A - Video false signal generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video false signal generator for generating a video signal easily and in safety, even at a high position or in a narrow place. <P>SOLUTION: A board (4) arranged with a pulse wave generator (3), e.g. a one chip microcomputer or a programmable gate array, and a battery (2) for power supply are arranged in a casing (6), having a connector (5) for connection with an AV system apparatus. A power switch (7) is arranged in a power supply circuit for connecting the battery (2) for power supply with the pulse wave generator (3). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    The present invention relates to a video pseudo signal generator used for adjustment and fault diagnosis in video equipment that displays video by an electrical signal such as a computer display or projector.

  Conventionally, when adjusting or troubleshooting a video device that displays an image using an electrical signal from a computer display or projector, the dedicated device or personal computer is connected to the target video device and generated by the dedicated device or personal computer. By transmitting the image signal to the target video device and displaying it on the video device, a circuit malfunction or the like in the video device is measured.

However, the target video equipment is often installed in a high place such as the ceiling or in a narrow place such as a desk. For example, it is large in order to make adjustments and diagnose failures using conventional methods. There is an inconvenience that it is necessary to carry a heavy device or a personal computer while carrying it, and also to ensure the power supply of the device.
In addition, there is a problem that the work is dangerous because the work is performed at a high place using heavy equipment.

  The present invention has been made paying attention to such points, and an object thereof is to provide a video pseudo signal generator capable of easily and safely transmitting a video signal even in a high place or a narrow place.

  In order to achieve the above-described object, the present invention provides a substrate in which a pulse waveform generator composed of a one-chip microcomputer or a programmable gate array and a power source battery are arranged in a casing having a connector for connection to an AV system device. It is characterized in that a power switch is disposed in a power circuit that is disposed and connects the power battery and the pulse waveform generator.

  In the present invention, a substrate on which a pulse waveform generator consisting of a one-chip microcomputer or a programmable gate array and a power source battery are arranged is disposed in a casing having a connector for connection to an AV system device. Since the power switch is arranged in the power supply circuit that connects to the pulse waveform generator, it becomes possible to send out a certain pseudo video signal without using a complicated circuit, so a small and lightweight pseudo video A signal generator can be formed. In addition, since the battery for power supply is built in the casing, it is not necessary to secure a separate power source for operating this device. Therefore, inspection and adjustment of AV system devices placed in high places or narrow places・ Work such as repair can be done safely and easily.

FIG. 1 shows an embodiment of the present invention, and FIG. 1 shows an exploded perspective view.
This image pseudo signal generator (1) has a battery (2) for power supply and a pulse waveform generator (3) comprising a CPU constituting a one-chip microcomputer arranged on a substrate (4). 4) is housed in a casing (6) fitted with a connector (5) on one side.

  On the other side of the casing (6), a power switch (7) and a pilot lamp (8) arranged in a power circuit connecting the power battery (2) and the pulse waveform generator (3) are arranged. It is. Reference numeral (9) in the figure denotes a cover plate of the casing (6).

  Here, as the power supply battery (2), four button-type alkaline batteries (LR44) and four button-type silver oxide batteries (SR44) are arranged in series. Further, a Dsub 15-pin connector is used as the connection connector (5).

  The video pseudo signal generator (1) configured in this way inserts and connects the connection connector (5) to the diagnostic target video equipment, and operates the power switch (7) disposed in the casing (6), The electric power from the power supply battery (1) is supplied to the pulse waveform generator (3). In the pulse waveform generator (3), a pulse waveform is created based on a preset program, and a pulse wave signal is sent to the diagnostic target video equipment via the connection connector (5).

Next, a procedure for forming a pulse wave in the pulse waveform generator (3) will be described with reference to FIG.
The power switch (7) is operated (step S1) to energize the pulse waveform generator (3).
Next, it is determined whether or not the power switch (7) is energized (step S2). If it is determined that the power switch (7) is not energized, the entire operation is terminated. On the other hand, if it is determined that the current is in an energized state, it is determined whether or not the counter in the pulse waveform generator (3) has reached a predetermined value (step S3), and it is determined that the predetermined value has been reached. If so, a VD synchronization signal is output (step S4).

  When it is determined in step S3 that the counter has not reached a predetermined numerical value and when step S4 has elapsed, an HD synchronization signal is output (step S5). Next, R video signal (step S6), G video signal (step S7), B video signal (step S8) are output in this order, the counter is incremented (step S9), and the power switch is turned on. Return to the determination procedure (step S2). Then, this determination procedure operates in a loop until it is determined that the power switch is OFF.

  In the embodiment described above, the pulse waveform generator (3) is constituted by the CPU constituting the one-chip microcomputer, but may be constituted by a programmable gate array. Further, the connection connector is not limited to the above-described Dsub 15-pin connector, and various connectors can be used. Furthermore, the battery for power supply is not limited to the above-mentioned button-type alkaline battery (LR44) or button-type silver oxide battery (SR44), and various primary batteries and secondary batteries including 4LR44 and 4SR44 batteries should be used. I can do it.

  INDUSTRIAL APPLICABILITY The present invention can be used for adjustment and failure diagnosis of video equipment in an AV system such as a computer display, projector, or television monitor.

It is a disassembled perspective view which shows embodiment of this invention. It is a flowchart explaining the pulse wave formation procedure in a pulse waveform generator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Image | video pseudo signal generator, 2 ... Battery for power supplies, 3 ... Pulse waveform generator, 4 ... Board | substrate, 5 ... Connector for connection, 6 ... Casing, 7 ... Power switch, 8 ... Pilot lamp.

Claims (3)

In the casing (6) having the connector (5) for connection to the AV system equipment, a board on which the power source battery (2) and the pulse waveform generator (3) are arranged is arranged, and this power source battery (2) A pseudo-signal generator configured by disposing a power switch (7) in a power circuit connecting the pulse waveform generator (3) and the pulse waveform generator (3). 2. The video pseudo signal generator according to claim 1, wherein the pulse waveform generator (3) is a one-chip microcomputer. The video pseudo signal generator according to claim 1, wherein the pulse generator (3) is a programmable gate array.

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