JP3729508B2 - Color image display device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a color image display device incorporating a small liquid crystal panel (hereinafter abbreviated as LCD).
[0002]
[Prior art]
Many video cameras are incorporated and used in so-called industrial machines, component positioning devices, moving image processing devices, character reading devices, and the like. This video camera is usually a monochrome (black and white) camera, and a video monitor of about 13 inches monochrome is placed on the apparatus. Furthermore, in an industrial machine in which such a video camera is incorporated into a portable type, for example, an optical fiber welded connector, a 3 inch monochrome liquid crystal monitor is used and is monitored with a monochrome image.
[0003]
[Problems to be solved by the invention]
However, since the video monitor of a conventional industrial machine has a black and white screen, it is difficult to identify compared with a color image, and the screen size of the monitor has to be increased in order to identify the image only from the brightness. Increasing the size of this monitor has the disadvantage of being separated from the device and placed on top, or protruding outside in portable devices.
[0004]
[Means for Solving the Problems]
The present invention relates to a color video display device having display means for displaying a color video based on an input analog video signal, and corresponding to each of the red, green and blue colors of the analog video signal by decoding the analog video signal. and Lud coder to output the output signal, the Brightness of the analog video signal is compared with a plurality of levels, an a / D converter for outputting a digital data corresponding to the comparison result, the digital data from the a / D converter based, made a switch circuit that performs control whether or not to supply an output signal corresponding to each color from the decoder to the display unit, the operating state of performing control based on the digital data by the switch circuit, the control based on the digital data and a switching means for switching between a non-operating state and supplies to always display an output signal corresponding to each color without, Wherein the Narogubideo signal is configured to be able to perform color display similar pseudo come with a monochrome video signal.
[0005]
[Action]
By providing the above-described means, according to the color video display device of the present invention, for example, the red, green and blue signals obtained by decoding a monochrome analog video signal are switched, and the luminance component level of the analog video signal is switched. Since a color image of a plurality of different colors corresponding to the tone is formed, for example, a monochrome analog video signal is displayed as a color image with a very simple configuration.
[0006]
【Example】
Embodiments of the present invention will be described in detail below with reference to the drawings.
[0007]
FIG. 1 is an external view of an embodiment of the present invention. The main body 1 includes a front panel 2, a case 3, and a rear panel 4. The front panel 2 has a window 6 pasted at the center of the panel, and the window 6 has a peripheral 7 painted black so that the LCD screen can be seen through the central transparent portion 8. Reference numeral 9 denotes a retaining screw. A hole 10 on the front surface of the front panel 2 is threaded so that the main body 1 can be screwed from the front.
[0008]
FIG. 2 is a view of the main body 1 viewed from the opposite side, and a screw hole 101 for attaching a tripod screw adapter 100 is opened on the bottom surface of the case 3. Reference numeral 11 denotes a hole for inserting a screwdriver for turning the image adjustment volume of the LCD. The rear panel 4 has a power terminal 12, a video input terminal 13, and a screen display changeover switch 14.
[0009]
FIG. 3 is an exploded view of the main body 1. A frame body 15 is contained in the case 3.
[0010]
FIG. 4 is a detailed view of the frame body 15. The frame 16 includes a backlit LCD 17, an LCD drive board 18, a pseudo color circuit board 19, and a power supply board 20. A power supply terminal 12, a video input terminal 13, and a screen display changeover switch 14 are mounted on the power supply board 20.
[0011]
FIG. 5 shows an electric circuit of the present apparatus. Video signals and DC power are input to terminals 21 and 22, respectively. Reference numeral 23 denotes a changeover switch for displaying the input video signal as it is on the LCD or displaying it in pseudo color. The input video signal is divided into RGB (red, green and blue) by the decoder 24. On the other hand, the video signal input from the terminal 21 is also input to the A / D converter 25.
[0012]
Here, the A / D converter 25 functions as a comparator, and operates a circuit 26 for switching the RGB signal output from the decoder 24 according to the gradation of the magnitude of the luminance signal of the video signal. The processed RGB signal enters the LCD driver circuit 28 and is displayed on the LCD panel 29.
[0013]
In this apparatus, the A / D converter 25 switches RGB, so that white (gray), yellow, cyan, green, magenta, red, blue, and black are colored in descending order of the luminance signal. Whether or not the circuit 26 is to be activated is switched by the changeover switch 23. Reference numeral 30 denotes a backlight, 31 denotes a power supply circuit, and 32 denotes a backlight inverter power supply.
[0014]
FIG. 6 shows an example in which this apparatus is incorporated in an optical fiber welded connector. This apparatus is fastened together with the operation button on the inclined operation panel 41 by the screw 42, and when the button is operated, the video of the video camera built in the optical fiber welded connector can be viewed through the window 6.
[0015]
FIG. 7 shows an example of a screen displayed on the optical fiber welded connector. This is a diagram of a process in which two optical fibers 44 are automatically aligned (ALIGNING), and the optical fiber core portion 45 and peripheral portion 46 and background 47 have different brightness. The above figure is a conventional example and is displayed only with brightness because it is a monochrome image. The lower figure shows a display example of the present apparatus. 46 is yellow, 45 is red, and 47 is green according to the brightness gradation.
[0016]
In this embodiment, the color arrangement is adjusted to a so-called color bar, but can be changed depending on the purpose. For example, it may be adapted to human sensitivity such as color change due to combustion temperature. In this example, the display is performed with 8 colors, but the number of colors may be further reduced to about 3 colors. It is also possible to add a single color to a black and white image.
[0017]
【The invention's effect】
According to the color image display apparatus of the present invention, for example, by switching each of red, green and blue signals obtained by decoding a monochrome analog video signal, the plurality of different colors corresponding to the gradation of the luminance component of the analog video signal are used. Since a color image is formed, for example, a monochrome analog video signal can be displayed as a color image with a very simple configuration.
[0018]
As a result, a circuit for displaying with a plurality of different colors that change in accordance with the gradation level of the luminance component of the input video signal is incorporated, so that even if a monochrome signal is input, it is displayed as a color image. Even if a monochrome signal is input, it is displayed as a color image, so that the contents can be identified even on a small screen monitor. Therefore, if the screen is reduced in size, a monitor can be easily incorporated into the apparatus. Furthermore, a small color LCD used for a viewfinder of a video camera-integrated VTR, which is used in large quantities and at a low cost, can be used for a monitor.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an example of a color video monitor apparatus according to the present invention.
FIG. 2 is a view of 1 viewed from the opposite side.
FIG. 3 is an exploded view of 1;
FIG. 4 is a detailed view of 15;
FIG. 5 is a diagram showing an electric circuit of the apparatus.
FIG. 6 is a diagram showing an example in which the present apparatus is incorporated in an optical fiber welded connector.
FIG. 7 is a diagram showing an example of a screen displayed on the optical fiber welded connector.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Front panel 3 Case 4 Rear panel 6 Window 7 Perimeter 8 Transparent part 9 Retaining screw 10 The hole by which the screw was cut in

Claims (1)

In a color video display device comprising display means for displaying a color video based on an input analog video signal,
And Lud coder to output red of the analog video signal by decoding the analog video signal, an output signal corresponding to the green and blue colors,
The Brightness of the analog video signal is compared with a plurality of levels, an A / D converter for outputting a digital data corresponding to the comparison result,
A switching circuit for performing the basis of the digital data, control output signals corresponding to the respective colors from the top Symbol decoder whether to supply to said display means from said A / D converter,
Switching means for switching between an operation state in which the control based on the digital data is performed by the switch circuit and a non-operation state in which an output signal corresponding to each color is always supplied to the display unit without performing the control based on the digital data. And
Color image display device characterized by the analog video signal is configured to be capable of performing a color display similar pseudo come with a monochrome video signal.

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