JP3381796B2 - Display control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention selects one of a plurality of sources such as a video tuner, a video tape recorder, and a laser disk and displays the selected source on a single display device. The present invention relates to a display control device suitable for use in a video system. 2. Description of the Related Art In a conventional video system, one of a plurality of sources such as a video tuner, a video tape recorder or a laser disk is selected and output to one CRT for display. I have. And
In order to clarify what the source currently displayed on the CRT is, the type of the source is displayed on the screen. FIG. 5A shows an image reproduced from an 8 mm video tape recorder (in this example, an image of Mt. Fuji).
Shows an example in which is displayed. As shown in this figure, "8 mm" is displayed at the upper right of the screen as a character indicating the type of source in addition to the original image. The user can easily recognize that the currently selected image is output from the 8 mm video tape recorder by looking at the display. As shown in FIG. 6, for example, the display of the type of source can be switched in the order of video 1, 8 mm video, VHS, beta, laser disk, TV, and "no display" by toggling. When "no display" is selected, the source type is not displayed. In the conventional video system, when a mode in which the display of the type of the source is not performed is selected as described above, when the video signal is not supplied from the source, As shown in FIG. 5B, no display is performed on the screen, which makes it difficult to distinguish the state from the power-off state, which is one of the factors that cause the user to forget to turn off the power. [0005] The present invention has been made in view of such a situation, and is intended to prevent forgetting to turn off the power supply and prevent unnecessary power consumption. [0006] A display control device according to the present invention comprises: one or more sources connected to one display device;
Display control device for a video system,
Selection means and, the Soviet Union to select the source to output display on the screen
Table that indicates the type of source when the source is output and displayed on the screen
Display, select from multiple displays, including no display, and
Display setting means for setting each of them , determining means for determining the presence / absence of a signal of the source selected by the selecting means , and the source selected by the selecting means having no signal
And the display of the source is displayed by the display setting means.
When set to No Display, the display shows the type of source.
And display means for displaying one of the following. In the display control device having the above structure, when there is no source signal and the display indicating the type of source is not displayed, the display indicating the type of source is displayed. one is the <br/> displayed. Therefore, even when there is no signal from the selected source, it can be distinguished from the state when the power is off. FIG. 2 is a block diagram showing the configuration of an embodiment of a video system to which the display control device of the present invention is applied.
The video tuner 2 demodulates radio waves received via the antenna 1 and supplies the demodulated video signal and audio signal to the selector 5. The selector 5 is supplied with a video signal and an audio signal output from the 8-mm video tape recorder 3 and the laser disk 4, respectively. The selector 5 is
For example, one of the signals supplied from the tuner 2, the 8 mm video tape recorder 3 or the laser disk 4 is controlled by the control circuit 10 including a microcomputer or the like, and the selected video signal is transmitted to the video processor 6. Also, the audio signal is transmitted to the audio processor 7.
Respectively. The video processor 6 processes the input video signal, converts it into R, G, B signals,
Output to T8. The audio processor 7 processes the input audio signal and outputs the processed audio signal to the speaker 9. The remote control device 13 turns on a source selection button 13c operated when selecting one of the sources of the tuner 2, the 8 mm video tape recorder 3 and the laser disk 4, and turns on the display of the type of the selected source. Or on / off button 13 operated when turning off
a, it has various keys including a display switching button 13b operated when switching the display of the source type. By operating the remote control device 13, a signal corresponding to the operation is emitted as infrared rays. Light receiving element 1
2 receives this infrared ray, converts it into an electric signal, and outputs it to the control circuit 10. The control circuit 10 controls each unit according to the input command. The non-volatile memory 11 stores predetermined data as needed. Next, the operation will be described. When the source selection button 13c of the remote control device 13 is operated, a selection signal corresponding to the operation is output as infrared rays. This infrared light is received by the light receiving element 12, converted into an electric signal, and output to the control circuit 10. The control circuit 10 reads this input signal and controls the tuner 2, the 8 mm video tape recorder 3 or the laser disk 4 according to the read result. As a result, the tuner 2, the 8-mm video tape recorder 3 or the laser disk 4 starts operating, and the reproduced video signal and audio signal are output to the selector 5. The control circuit 10 also
At this time, the selector 5 is controlled, and the selector 5 is switched so as to select a source corresponding to a command from the remote control device 13. The audio signal and the video signal selected by the selector 5 are supplied to an audio processor 7 and a video processor 6, respectively. The audio processor 7 processes the input signal and
And output the sound. The video processor 6 processes the input signal and converts it into R, G, B signals,
Output to T8. In this way, the image and sound of the selected source can be monitored from the CRT 8 and the speaker 9. Next, referring to the flowchart of FIG.
An operation for displaying the type of the selected source on the RT 8 will be described. When the display switching button 13b of the remote control device 13 is operated, the control circuit 10 sets the display rewriting mode. If the control circuit 10 determines in step S1 that the display rewriting mode is set, the process proceeds to step S2, and the display of the input source is changed to video 1, 8 mm video, VHS in response to the operation of the display switching button 13b. , Beta, laser disk, TV, no display, video 1 toggle. Display switching button 13b
The setting corresponding to the operation is stored in the nonvolatile memory 11 in step S3. If it is determined in step S1 that the mode is not the display rewriting mode, the process proceeds to step S4, where the source selection button 13
It is determined whether or not c has been operated. Source selection button 13c
Is operated, the process proceeds to step S5, and the input source is switched. That is, the control circuit 10
Operates the tuner 2, the 8-mm video tape recorder 3 or the laser disk 4 in response to the input command, and causes the selector 5 to selectively output the corresponding output. The selected source is displayed according to the data stored in the nonvolatile memory 11. For example, when the tuner 2 is selected, the character "TV"
When the 8 mm video tape recorder 3 is selected, “8
When the character "milli" or the laser disk 4 is selected, the character "laser disk" is output from the control circuit 10 to the video processor 6 and displayed on the upper right of the CRT 8. In step S4, the source selection button 13
If it is determined that c has not been operated, the process proceeds to step S6, and it is determined whether three seconds have elapsed after the source switching. If three seconds have not yet elapsed after switching the source, the process proceeds to step S7, and a predetermined process is executed. After switching from one source to another,
When three seconds have elapsed, the process proceeds from step S6 to step S8, and it is determined whether a video signal (or audio signal) is supplied from the switched source.
If there is a video signal (or audio signal), the process proceeds to step S9, and it is determined whether or not "no display" is currently selected. As described above, if the "no display" mode is selected, the display indicating the type of source is not performed, and the process returns to step S1. For example, as shown in FIG.
When the source is switched to the 8 mm video tape recorder 3 from the state where is selected, the display screen of the CRT 8 changes from the output of the laser disk 4 to the output image of the 8 mm video tape recorder 3 (FIG. 1A) (FIG. 1A). Fuji image). Then, even when three seconds have elapsed since the switching, the display indicating the type of the input source is not performed as shown in FIG. 1B. If it is determined in step S9 that the mode is not the "no display" mode, that is, if any input source is being displayed (display performed in step S5), the display is deleted in step S10. Will be. For example, as shown in FIG. 4, it is assumed that the laser disk 4 is selected, its output is displayed, and characters indicating the type of the source of the “laser disk” are displayed in a superimposed manner. In this state, for example, when the input source is switched to the 8 mm video tape recorder 3, the image output from the 8 mm video tape recorder 3 is displayed on the CRT 8, and the characters “8 mm” are displayed on the upper right of the screen. (FIG. 4a). After switching from the laser disk 4 to the 8 mm video tape recorder 3, the character “8 mm” is erased after 3 seconds have elapsed (FIG. 4B). If it is determined in step S8 that a video signal (or audio signal) is not supplied from the input source, the process proceeds to step S11, in which it is determined whether the currently set mode is the "no display" mode. Is done.
If the “no display” mode has been set, step S
Proceeding to step 12, for example, the characters "video 1" are displayed at the upper right of the screen. If the mode is not the "no display" mode (the mode indicating characters indicating the type of input source is displayed), the process proceeds to step S13, and the display of the set mode is continued. For example, when the "no display" mode is set as shown in FIG.
When the video signal (or audio signal) is not supplied from the 8 mm video tape recorder 3 when the source is switched to the 8 mm video tape recorder 3, nothing is displayed on the CRT 8 as shown in FIG. 1C. Not done. However, when three seconds elapse after the switching, as shown in FIG.
8 is displayed in the upper right corner. Further, as shown in FIG.
When the source is switched to the 8 mm video tape recorder 3 in a state where is selected, if no video signal (or audio signal) is supplied from the 8 mm video tape recorder 3, as shown in FIG. The image from the video tape recorder 3 is not displayed on the CRT 8. However, the characters "8 mm" are displayed.
This state is continued as shown in FIG. 4D even after three seconds have elapsed after the switching. Therefore, when the selected input source is not outputting a video signal (or audio signal), it is possible to prevent this state from being erroneously recognized as a power-off state. As described above, according to the display control apparatus of the present invention, even when the display of the source type is set to non-display, no signal is supplied from the selected source. In such a case, the predetermined display is performed, so that it is possible to prevent the user from erroneously recognizing the power-off mode, so that power is not wasted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining a change in a screen when an input source is switched in a “no display” mode. FIG. FIG. 3 is a block diagram showing the configuration; FIG. 3 is a flowchart for explaining the operation of the embodiment of FIG. 2; FIG. FIG. 6 is a diagram for explaining display in a conventional video system. FIG. 6 is a diagram for explaining display switching of the type of input source. Audio processor 8 CRT 9 Speaker 10 Control circuit 11 Non-volatile memory 12 Light receiving element 13 Remote control device 3a on, off button 13b displayed switching button 13c source selection button

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Claims (1)

(57) [Claim 1] One or more sources and one display device
Display control device of the video system to which the
Te, selection means for selecting the source to be output displayed on the screen of the display device, the species of the source when the source and output displayed on the screen
Select the display that represents the class from multiple displays including non-display,
A display setting means for setting for each of said source, a determination unit configured to determine whether the source of the signal selected by the selection unit, the source is the determination hand selected by said selection means
The signal is determined to be no signal by the step, and the display of the source is
When the display setting means is set to no display,
Display means for displaying one of the displays representing the types of sources .