JPH0934423A - Display device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device and a method by which auxiliary display information different from the display information directly output from a computer is easily watched without increasing the cost. SOLUTION: A display device is provided with a display 2 having a screen for displaying input display signals, a conversion circuit which detects signals for synchronizing a scope output by a computer and converts it into numeric values, converts it into prescribed characters, figures, etc., and outputs synchronous signals of a prescribed frequency and display signals composed of numerical synchronous signals and color signals for displaying figures, a circuit for switching between the display signals from the conversion circuit and the display signals composed of synchronous signals and color signals directly input from the computer, and a switch 4 for generating a signal which instructs switching of signals by the switch circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device and method used as an output device for displaying a result or a state of a computer.

[0002]

2. Description of the Related Art A display device using a CRT or a liquid crystal is generally well used as an output device for displaying the result or state of a computer such as characters and figures. that time,
A vertical synchronizing signal, a horizontal synchronizing signal, a color signal, etc. are output from the computer side to the display device side. On the other hand, the display device synchronizes the screen with the synchronization signal and displays it.

The synchronizing signal has various frequencies depending on the type of computer. However, it is necessary to select an appropriate display device that synchronizes with all frequency bands in accordance with the signal of the computer, but normally, a special device or the like is required to check the synchronization signal output by the computer, Not common.

Therefore, conventionally, as shown in FIG. 5, for example, in addition to the main display area (display surface) 52 of the display device 51 for displaying the result or state of the computer,
This display device 51 is provided with a sub-display area 53,
There is a sub-display area 53 for displaying the frequency of a computer. That is, in the display device 51 shown in FIG. 5, the synchronization frequency of the computer is "70.
"Hz" is displayed based on information from the computer.

[0005]

However, in the conventional structure shown in FIG. 5, it is necessary to provide a sub-display area in addition to the main display area, which causes a problem of high cost. Further, the sub display area 53 has to be smaller than the display area of the main display portion. Therefore, the amount of information was limited.

The present invention has been made in view of the above problems, and an object thereof is to make it easy to view sub display information different from the main display information directly output from a computer without increasing the cost. The present invention provides a display device and method.

[0007]

In order to achieve the above object, a display device of the present invention has a display having a display surface for displaying an input display signal, and information from the host device to the display signal. To the display signal from the conversion means and the display signal from another path, and a changeover switch for controlling the changeover means.

In order to achieve the above object, the display method of the present invention is such that display signals sent from different paths are switched by a change-over switch to display different display signals on the same display. .

According to this, by operating the change-over switch, the display signals sent from different paths can be displayed on the same display. Therefore, if only one display is prepared, information from the other can be displayed. Moreover, since all the information is displayed on the same large display surface, it is possible to make all the displays easy to see.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 are external views of a display device shown as an example of the present invention, and FIG. 1 is a view showing a display state (when a frequency is not displayed) when a frequency of a computer (upper device) is not displayed, FIG. FIG. 6 is a diagram showing a display state (when displaying frequencies) when a computer frequency is displayed.

1 and 2, the display device 1 comprises a display 2 having a display surface which defines a display area 3 on the front surface. The display 2 may be a CRT, a liquid crystal, or any other display. Further, a switch 4 for switching the display (hereinafter, referred to as “switch 4”) is provided on the front surface of the display device 1.

In the display device 1, the information displayed in the display area 3 can be switched by pressing the changeover switch 4. In FIG. 1, information indicating the result or state output by the computer is displayed. Is displayed in the display area 3, and in FIG. 2, information representing the synchronous frequency band of the computer is displayed in the display area 3. That is, in FIG. 2, it is displayed in the display area 3 that the synchronization frequency band of the connected computer is “70 Hz”.

FIG. 3 is a block diagram showing a circuit configuration of essential parts in the display device according to the present invention. In FIG. 3, this circuit roughly includes a conversion circuit A and a switching circuit B. Of these, the conversion circuit A is a circuit that detects a synchronization signal and digitizes it, and outputs it as a synchronization signal and a color signal of a predetermined frequency. The switching circuit B has two input paths for the synchronization signal and the color signal, This is a circuit that selects either one by the changeover switch 4.

The synchronizing signal S1 is a signal for screen synchronization output by the computer, the color signal S2 is a color information signal output by the computer, the display switching signal S3 is a signal indicating the state of the changeover switch 4, and the synchronizing signal S4. And color signal S5
Is a signal selected by the switching circuit B. A plurality of signal lines for the signals S1, S2, S3, S4, S5 may be provided, and the entire circuit block is located immediately before the signal input section of the conventional display device.

Next, the operation of this display device will be described. First, in the display device 1, the changeover switch 4 is off. As a result, the display switching signal S3 is also off, and the switching circuit B selects the synchronizing signal S1 and the color signal S2 output from the computer at this time. That is, the synchronization signal S1 and the synchronization signal S4, and the color signal S2 and the color signal S5 are the same, and the image output from the computer is displayed as it is in the display area 3 (display surface) of the display device 1. FIG. 1 shows this state.

When the changeover switch 4 is turned on, the display changeover signal S3 changes from off to on, and the signal from the conversion circuit A is selected by the changeover circuit B. As a result, the synchronization frequency of the computer is displayed large in the display area 3 of the display device 1. FIG.
Shows a state in which the sync frequency of the computer is displayed in the display area 3 in this way. In this case, the original display information may be left as it is, and a window may be opened so as to be overlapped with the original display information and displayed in this window.

Therefore, according to this embodiment, by turning the change-over switch 4 on and off, it is possible to display the synchronization frequency of the computer on the same display 2 in place of the information normally displayed. Therefore, if only one display 2 is prepared, both information can be displayed. As a result, it is possible to reduce the cost and to display both pieces of information on the same large display surface (display area 3) so that both pieces of information can be easily viewed.

Further, in the above embodiment, the changeover switch 4
The case where the synchronization frequency of the computer is displayed in the display area 3 by switching the above has been described, but it is also possible to display a calendar and time by incorporating a clock circuit in the conversion circuit A, for example.

Next, FIG. 4 is a configuration block diagram of an information processing system shown as a modification of the present invention. 4, in the information processing system, the device shown in FIGS. 1 to 3 has the circuit components such as the conversion circuit A, the changeover circuit B, and the changeover switch 4 built in the display device 1. A frequency display device 9 is provided between the computer (upper device) 10 and the display device 1, and the frequency display device 9 includes the main circuit components (conversion circuit A, switching circuit B) shown in FIG. The changeover switch 4 and the like shown in FIG. 2 are built in, and the frequency display device 9 and the computer 10, and the frequency display device 9 and the display device 1 are connected by signal lines 7 and 8. In this modification, only the frequency display device 9 can be unitized and assembled. Further, by attaching the frequency display device 9 to an existing display device, the existing one can be changed to a display device capable of frequency display.

[0020]

As described above, according to the present invention,
By operating the change-over switch, the display signals sent from different paths can be displayed on the same display, so that it is possible to display all the information by preparing only one display. Thereby, cost can be reduced. Moreover, since all the information can be displayed on the same large display surface, it is possible to obtain an effect such that all the displays can be easily viewed.

[Brief description of drawings]

FIG. 1 is an external view of a device of the present invention.

FIG. 2 is an external view of the device of the present invention.

FIG. 3 is a block diagram showing a circuit configuration of a main part of the device of the present invention.

FIG. 4 is a configuration block diagram showing a modification of the device of the present invention.

FIG. 5 is a diagram showing an example of a conventional display device.

[Explanation of symbols]

 1 Display Device 2 Display 3 Display Area (Display Surface) 4 Changeover Switch A Conversion Circuit B Changeover Circuit

Claims (7)

[Claims] 1. A display having a display surface for displaying an input display signal, means for converting information from a host device into the display signal, and a path different from the display signal from the converting means. And a changeover switch for controlling the changeover means, the display device comprising: 2. A clock circuit is built in the conversion circuit,
The display device according to claim 1, wherein the display signals such as calendar and time are output. 3. A display having a display surface for displaying an input display signal, and a signal for screen synchronization output from a higher-level device is detected and digitized to form a predetermined character or figure. A conversion circuit that converts and outputs as the display signal, a circuit that switches the display signal from the conversion circuit and the display signal that is directly input from the host device, and a signal that instructs switching of the signal by the switching circuit A display device comprising: a changeover switch for operating the display device. 4. A display having a display surface for displaying an input display signal, and a signal output by a computer for screen synchronization is detected and digitized, and converted into a predetermined character or figure. However, a conversion circuit that outputs the display signal composed of a synchronization signal of a predetermined frequency and a synchronization signal that has been digitized and a color signal for displaying characters and figures, a display signal from the conversion circuit, and a direct input from the computer. A display device, comprising: a circuit for switching a display signal composed of a sync signal and a color signal; and a changeover switch for generating a signal for instructing switching of the signal by the switching circuit. 5. The display device according to claim 4, wherein the conversion circuit, the changeover circuit, and the changeover switch are unitized independently of the display and the computer. 6. A display method, characterized in that display signals sent from different paths are switched by a changeover switch to display different display signals on the same display. 7. The display method according to claim 6, wherein one of the display signals sent from different paths is a signal representing a frequency of a synchronization signal.