JP4329134B2 - Video input device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to video equipment including a television receiver.
[0002]
[Prior art]
A conventional television receiver has a configuration in which a switch for switching an input system every time it is pressed is incorporated in a television receiver or provided in a remote control transmitter for remotely operating the television receiver.
In a television receiver having an input system direct changeover switch for each input system, the number of switches increases as the number of input systems increases.
[0003]
[Problems to be solved by the invention]
In the case of the above-described conventional configuration, as the number of input systems of the television receiver increases, the number of switch operations required until a desired input system is selected increases, and there is a problem that the operational feeling of the user is greatly impaired. Was.
In addition, in order to improve this, in a television receiver having an input system direct changeover switch for each input system, the number of switches must be increased as the number of input systems increases, or the number of switches cannot be physically arranged or the number is increased. There is a problem that it is difficult to find a desired switch when the number of switches is too large.
[0004]
SUMMARY OF THE INVENTION The present invention solves the above-described problems, and an object of the present invention is to provide a television receiver in which an input system intended by a user can be easily selected with as few operations as possible and the number of operation switches.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, a video input device according to the present invention includes a video input terminal plate that can detect whether or not a terminal is connected to the video input terminal, and a video signal that can freely switch a video signal input to the video input terminal. A switching device, a synchronization signal detection circuit that is connected to the video signal switching device and detects the presence or absence of a synchronization signal of the video signal, and a non-reproducible noise signal can be detected by differentiating the video signal connected to the video signal switching device Using a noise signal detection circuit and a microcomputer capable of comprehensively recognizing such information, it is automatically determined which input system is currently connected to a terminal and which video equipment is turned on in that terminal. Are stored in a microcomputer in a matrix.
[0006]
The microcomputer displays the state on-screen and indicates to the user which input system is connected to the video equipment and which equipment is powered on.
The user indicates a desired input system from the on-screen display by a remote control transmitter having a pointing device and switches the input system.
Alternatively, the number of user operations can be reduced by automatically limiting the input system selected by the switch that sequentially switches the input system each time it is pressed from the above information to a meaningful input system, or by rearranging the order of the selected input system. Thus, it is possible to configure a television receiver that can effectively reduce the input and improve the operational feeling of input switching.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, there is provided a video signal switching device capable of freely switching a video signal input to a video input terminal, and a synchronization signal detection circuit connected to the video signal switching device for detecting presence / absence of a synchronization signal of the video signal. And the output of a noise signal detection circuit that can detect a noise signal that cannot be reproduced by differentiating the video signal connected to the video signal switching device, and the presence or absence of terminal connection to the video input terminal can be detected Using a microcomputer that can recognize the logical product of the terminal connection detection results obtained from the video input terminal board separately and one by one, the video system is currently connected by the user operation of the input system selector switch that switches the input system each time it is pressed. In addition, the input of the television receiver is preferentially switched to an input system with some input, and then there is a video equipment connection. Switch the input to the power system, others are skipped.
[0016]
Hereinafter, a television receiver in an embodiment of the present invention will be described with reference to the drawings.
Example 1
The television receiver according to claim 1, claim 2, claim 3 and claim 4 of the present invention is shown in FIGS. 1, 2 and 3, and the television receiver of claim 4 is taken as an example. explain.
[0017]
FIG. 1 is a block diagram of a signal switching device in a television receiver of the present invention, and shows the relationship between a microcomputer and a remote control transmission device.
In FIG. 1, reference numeral 1 is a terminal plate for detecting the presence / absence of input of a video signal terminal, 2 is a signal switching device, 3 is a synchronization signal detection circuit, 4 is a noise signal detection circuit, 5 is a microcomputer, and 6 is a pointing device. It is a remote control transmitter equipped.
FIG. 2 is a diagram illustrating a connection example of an external video device. FIG. 3 is a diagram showing an example of an on-screen display of the connection status of external devices. 8 is an on-screen display, and 9 is a list of external connection devices that can be selected at that time.
[0018]
The connection status of various video devices connected to the signal switching device is recognized by the terminal board 1 and the microcomputer 5, and the synchronization signal is based on the signal sequentially switched by the signal switching device 2 to determine whether or not the external video device is powered on. It is detected by the detection circuit 3 and the noise signal detection circuit 4 and recognized by the microcomputer 4.
The microcomputer 5 stores this information and indicates the state to the user by an on-screen display. At the same time, the microcomputer 5 classifies the input systems into selectable input systems and unselectable input systems according to the above conditions.
The user uses a remote control oscillator 6 equipped with a pointing device to point to a desired input system from among several options shown by the on-screen display 8, and determines the input of the television receiver.
[0019]
(Example 2)
The television receiver according to claim 5, claim 6, claim 7, claim 8, and claim 9 of the present invention will be described with reference to FIGS. 1, 2, and 4. An example will be described.
[0020]
FIG. 1 is a block diagram of a signal switching device in a television receiver of the present invention, and shows the relationship between a microcomputer and a remote control transmission device.
In FIG. 1, reference numeral 1 is a terminal plate for detecting the presence / absence of input of a video signal terminal, 2 is a signal switching device, 3 is a synchronization signal detection circuit, 4 is a noise signal detection circuit, 5 is a microcomputer, and 7 is pressed each time. This switch switches the input system. FIG. 2 is a diagram illustrating a connection example of an external video device. FIG. 4 is a diagram showing the externally connected devices that can be selected at that time and the selection order.
[0021]
The connection status of various video devices connected to the signal switching device is recognized by the terminal board 1 and the microcomputer 5, and the synchronization signal is based on the signal sequentially switched by the signal switching device 2 to determine whether or not the external video device is powered on. It is detected by the detection circuit 3 and the noise signal detection circuit 5, recognized by the microcomputer 5, and these pieces of information are stored.
At the same time, the microcomputer 5 classifies the input systems into selectable input systems and unselectable input systems according to the above conditions.
The user operates the input system changeover switch 7 for switching the input system every time the user presses it, and searches for the desired input system in order from the automatically extracted meaningful input systems in order, and the input of the television receiver. To decide.
[0022]
【The invention's effect】
As described above, according to the present invention, in a television receiver having a plurality of input systems, the presence / absence of connection to an external device and the presence / absence of power-on of an external device are recognized and automatically extracted into a meaningful input system. By limiting the selection conditions or changing the selection order, it is possible to configure a television receiver that easily selects an input system intended by the user with as few operations as possible.
[Brief description of the drawings]
FIG. 1 is a block diagram of a signal switching block of a television receiver in an embodiment of the present invention. FIG. 2 is a diagram showing an example of connection of an external video device to the television receiver. FIG. 4 is a diagram showing an example of on-screen display in FIG. 4 is a diagram showing a selection order of externally connected devices in one embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 Terminal board with a terminal detection function 2 Signal switching device 3 Synchronization signal detection circuit 4 Noise signal detection circuit 5 Microcomputer 6 Remote control transmitter 7 equipped with pointing device Switch 8 which switches input system every time it is pressed 8 On-screen display 9 External connection equipment List

Claims (1)

Connected to the video signal switching device, a video signal switching device capable of switching a video signal input to the video input terminal, a video input terminal plate for detecting presence / absence of insertion of video input terminals from a plurality of video devices A synchronization signal detection circuit for detecting the presence or absence of a synchronization signal of a video signal, a noise signal detection circuit connected to the video signal switching device and capable of detecting a noise signal, and insertion of a video input terminal based on a detection result of the video input terminal plate Based on the detection result of the video input terminal board, a microcomputer that recognizes the presence or absence, and further recognizes the presence or absence of power-on of the video equipment from the detection result of the synchronization signal detection circuit and the detection result of the noise signal detection circuit A video input terminal connected to a video device, a detection result of the synchronization signal detection circuit, or a detection of the noise signal detection circuit. Results by said video apparatus sequentially switching switches only the video input terminal in power-up, or with a remote control transmitter for remotely controlling an image input apparatus,
In the switching of the switch or the remote control transmitter, the video input terminal connected to the video equipment and the video input terminal during power-on of the video equipment are preferentially selected, and the video equipment connected to the video equipment is selected. The video input device, wherein an input terminal and a video input terminal when the video device is turned off are selected thereafter .

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