JP2001320697A - Monitor for monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem of a conventional monitor in a monitoring system that has caused baking on a screen of a cathode ray tube because the luminance of characters in white is high, resulting in causing baking on the cathode ray tube and leaving the displayed characters on the screen as they are when the characters in white are displayed at all times at decided positions on the screen, and to reduce the baking for the longer service life of the cathode ray tube. SOLUTION: The characters are not always displayed at prescribed positions but the displayed positions are automatically and periodically changed so as to reduce baking on the screen of the cathode ray tube.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character display function of a CCTV device in a monitoring system using a television camera.

[0002]

2. Description of the Related Art A character display (for example, a place where a surveillance camera is installed, a place name, etc.) on a CCTV apparatus is displayed at a certain place on a screen.

[0003]

If a character is constantly displayed in white at a predetermined position on the screen, the brightness of the character is high in the case of white, and a burn-in phenomenon occurs on a cathode ray tube of a monitor, and the character display is not changed. It remains on the screen. I want to reduce the burn-in phenomenon to extend the life of the CRT. In the case of black or the like, burn-in hardly occurs, but visibility is poor.

[0004] For example, a screen saver often used in a personal computer operates for a certain set time, and a CRT is used.
This is to change the screen and prevent screen burn-in due to long-time fixed display.

[0005]

Accordingly, the present invention reduces the burn-in to a cathode ray tube by automatically and periodically changing the display position, instead of the character display always being displayed at a fixed place. It is something to do.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system diagram showing the case where the present invention is applied.

In FIG. 1, reference numeral 1 denotes a CCTV camera, 2 denotes a character generator for creating characters to be displayed on a screen,
Reference numeral 3 denotes a CCTV monitor that displays this image.

[0008] Characters are added to the image captured by the CCTV camera 1 by a character generator. In the character generation device, the display position of the display character is moved on the screen, and the display position is set so that it does not always stay at one place.

FIG. 2 is an example of a monitor screen display when the embodiment of the present invention is applied. Reference numeral 3 denotes a CCTV monitor for displaying an image of the CCTV camera 1, and reference numeral 4 denotes a position of a character displayed on the monitor. As shown in the figure, the characters move on the screen from left to right at intervals of, for example, about 3 minutes, and thereafter, this operation is repeated. The display position of the display character 4 is shown in FIG.
As shown in C and D, it is the upper or lower part of the screen.

[0010]

As described above, according to the present invention, burn-in can be prevented while monitoring the monitor. Since the burn-in of characters on the screen is reduced, the useful life of the CRT can be extended.

[Brief description of the drawings]

FIG. 1 is a system diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an embodiment of the present invention.

[Explanation of symbols]

1 CCTV camera, 2 character generator, 3 monitor,
4 display characters

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G09G 5/32 G09G 5/32

Claims (1)

[Claims] 1. A monitoring system using a television camera, wherein the monitor displays an image taken by the television camera and displays characters simultaneously with the image.
A monitor device in a surveillance system using a television camera, wherein a burn-in phenomenon of the monitor is reduced by periodically changing a position of a character displayed on the monitor on a screen.