JP2013021605A - Matrix switcher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switcher which can selectively switch a plurality of input systems that can be connected at every output system.SOLUTION: The matrix switcher includes: a switch matrix circuit consisting of a switch which selectively connects one of the plurality of input systems to the output system; a single color LED matrix circuit which displays a connection state of the output system and the input system by lighting of a single color LED; and a control section which controls the switch matrix circuit and the single color LED matrix circuit. The control section varies a lighting state of the single color LED in a connection state where a video signal and a sound signal which are outputted from the output system are a video signal and a sound signal which are inputted from the same input system, and a lighting state of the single color LED in a connection state where the video signal and the sound signal which are outputted from the output system are a video signal and a sound signal which are inputted from different input systems.

Description

  The present invention relates to a matrix switcher that can selectively switch a plurality of input systems connectable for each output system.

  There is known a matrix switcher capable of selecting and switching video signal and audio signal input systems for each output system. Each output system and each input system has at least one set of video signal terminals and audio signal terminals. A plurality of selection buttons are arranged on the outer surface of the matrix switcher casing, and an input system connected to each output system is selected by a predetermined operation on the selection buttons. That is, as many selection buttons as the number of connectable input systems are arranged in each output system.

  The predetermined operation is, for example, a selection button pressing operation. When the selection button is pressed, the selected one input system is connected in the output system corresponding to the operation button. At this time, the video input terminal of the input system is connected to the video output terminal of the output system, and the audio input terminal of the input system is connected to the audio output terminal of the output system. In other words, the video signal and the audio signal from one input system are connected to one output system.

  In recent years, there has been known a matrix switcher that can connect video input terminals and audio input terminals of different input systems for each output system, and can selectively switch connection of control signals of connected devices (for example, (See Patent Document 1).

  The matrix switcher described in Patent Document 1 includes a display unit that displays according to each connection state in order to distinguish a plurality of connection states. The said display part distinguishes and displays the color corresponding to a connection state.

Japanese Patent No. 3271124

  As in the matrix switcher of Patent Document 1, a light emitting element capable of emitting multicolor light is used for a display portion that displays a plurality of connection states by color, or a liquid crystal monitor or the like is used. These display units have problems such as an increase in size, a complicated control system, and an increase in manufacturing cost. Further, when the number of connection states to be distinguished increases, the display color is also required accordingly. Since many colors may be displayed at a time, it may be difficult to visually recognize them, so the number of connection states to be distinguished is limited.

  Therefore, if the display unit can be constituted by a single color LED (single color LED), the display is easy to see and the control system is simple, so that it can be manufactured at a low cost, and the minimum necessary connection status can be displayed. That's fine. However, in order to individually switch the connection destination of the video signal and the audio signal, a state indicating that the input system for inputting the video and the audio is the same for one output system, and the case where the input system for the video and the audio are different. It is necessary to distinguish and display at least three states: a state to be displayed and a state to indicate when nothing is connected.

  When a single color LED is used for the display unit, it is possible to display two states (lighted and extinguished), but a device is required to display three or more states. For this reason, in a matrix switcher in which video signals and audio signals are individually connected, a display unit that can be color-coded as described in Patent Document 1 is used. However, a matrix switcher having a display unit that can display three or more states using a single color LED is not known.

  The present invention has been made in view of the above problems, and is a matrix switcher capable of individually selecting and switching a video signal and an audio signal from an input system connected to each of a plurality of output systems. An object of the present invention is to provide a matrix switcher capable of displaying a plurality of connection states to each output system by a display unit using LEDs.

  The present invention relates to a matrix switcher for selectively connecting any one of a plurality of input systems to an output system, and a switch matrix circuit comprising a switch for selectively switching and connecting an input system connected to an output system And a control for controlling the connection state of the output system and the input system according to the lighting state of the single color LED, the connection state in the switch matrix circuit, and the lighting state of the single color LED in the single color LED matrix circuit The control unit has a connection state in which the video signal and the audio signal output from the output system are the video signal and the audio signal input from the same input system (hereinafter referred to as a “first connection state”). Input color signal and audio signal output from the output system are different. The varying and a lighting state of the single-color LED in the connected state a video signal and an audio signal (hereinafter referred to as "second connection state.") Inputted from the integrated and main features.

  According to the present invention, the monochromatic LED can clearly display the input system connected to the output system in a state that is easy to visually recognize even when there are a plurality of states (connection states). It is possible to obtain a matrix switcher with excellent visibility of status display.

It is a block diagram which shows embodiment of the matrix switcher which concerns on this invention. It is a block diagram which shows the example of a part of structure of the said matrix switcher in detail. It is a figure which shows the example of the switch matrix which the said matrix switcher has. It is a figure which shows the example of the monochromatic LED matrix which the said matrix switcher has. It is a figure which shows the example of an internal structure of MUX which the said matrix switcher has. It is a figure which shows the example of the connection status display in the said LED matrix. It is a figure which shows the example of the connection state of MUX which the said matrix switcher has. It is a figure which shows another example of the connection state display in the said LED matrix. It is a figure which shows another example of the connection state of MUX which the said matrix switcher has. It is a timing chart which shows the example of the selection signal which CPU which the said matrix switcher emits. It is a figure which shows the example of the connection state display of the LED matrix which concerns on another embodiment of the matrix switcher which concerns on this invention. It is a figure which shows the example of another connection state display of the LED matrix which concerns on the said another embodiment. It is a figure which shows the example of another connection state display of the LED matrix which concerns on the said another embodiment. It is a figure which shows the example of another connection state display of the LED matrix which concerns on the said another embodiment. It is a figure which shows the example of another connection state display of the LED matrix which concerns on the said another embodiment. It is a figure which shows the example of another connection state display of the LED matrix which concerns on the said another embodiment.

  Embodiments of the matrix switcher according to the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram of the matrix switcher according to the present embodiment. In FIG. 1, the matrix switcher 100 includes a CPU 10, a switch matrix 20, a single color LED matrix 30, a MUX 40, an input system 50, and an output system 60. Since the matrix switcher according to the present invention is such that at least one input system selected from the plurality of input systems 50 is connected to the output system 60, it is sufficient that at least one output system 60 is provided. FIG. 1 shows an example in which there are a plurality of input systems 50 and output systems 60, respectively.

  The input system 50 included in the matrix switcher 100 has at least one set of video input terminals and audio input terminals. A device serving as a signal input source is connected to the video input terminal and the audio input terminal. Therefore, the matrix switcher 100 has a configuration capable of outputting input signals from a plurality of devices to an output system.

  The output system 60 included in the matrix switcher 100 includes at least one set of video output terminals and audio output terminals. The video output terminal and the audio output terminal are connected to a device serving as an output destination of the video signal and the audio signal. Therefore, the matrix switcher 100 has a configuration in which an input signal from the input system 50 connected to each output system 60 can be output from a device connected to each of the plurality of output systems 60.

  The output system 60 may be one. That is, the matrix switcher according to the present invention selectively selects whether the video signal and the audio signal output from one output system are the video signal and the audio signal input from any of the plurality of input systems 50. It can be switched and connected.

  Here, “connecting the output system 60 and the input system 50” is provided in the matrix switcher 100 so as to be “a state where a signal input from the input system 50 is output from the output system 60”. The control unit is configured to connect the video input terminal (audio input terminal) related to the input system 50 selected from the input system 50 and the video output terminal (audio output terminal) of the output system 60 in the MUX 40 described later. Reference numeral 10 denotes an operation of outputting a control signal corresponding to the signal from the switch matrix 20 to the MUX 40.

  The CPU 10 is a control unit that controls the overall operation of the matrix switcher 100. In response to a predetermined operation performed on the switch matrix 20, a control signal is issued to the MUX 40 so as to connect the selected input system 50 to one output system 60, and at the same time, the connected A signal for controlling display according to the state (hereinafter referred to as “display signal”) is issued to a monochromatic LED matrix 30 described later. By this display signal, the monochromatic LED matrix 30 changes the display state.

  The switch matrix 20 includes operation buttons (not shown) arranged outside the housing of the matrix switcher 100 and switches that detect operations (presses) on the operation buttons. When the operation button is pressed, the CPU 10 is notified of a signal corresponding to the selection operation (hereinafter referred to as “selection signal”).

  The single-color LED matrix 30 constitutes a display unit (not shown) arranged outside the housing of the matrix switcher 100. The monochromatic LED matrix 30 includes monochromatic LEDs that display the connection state between each output system 60 and the input system 50. The single color LEDs included in the single color LED matrix 30 are arranged corresponding to the selection switches included in the switch matrix 20. Therefore, the display signal is notified from the CPU 10 to the single color LED corresponding to the arrangement position of the selection switch of the switch matrix 20 in which the predetermined operation is performed. In response to this display signal, the lighting state of the single color LED at the corresponding position in the single color LED matrix 30 changes.

  The MUX 40 is a selective connection circuit (selector) that switches the connection between the input system 50 and the output system 60 in accordance with a control signal generated by the CPU 10 in response to a selection signal from the switch matrix 20.

  Here, the configuration of the MUX 40 included in the matrix switcher 100 will be described. FIG. 2 is an image diagram showing an example of the internal configuration and operation of the MUX 40. In FIG. 2, one input system 50 includes a video input terminal 51 and an audio input terminal 52. One output system 60 includes a video input terminal 61 and an audio input terminal 62. The video input terminal 51 and the video output terminal 61 are connected via a MUX 41, and the audio input terminal 52 and the audio output terminal 62 are connected via a MUX 42.

  The MUX 41 connects the video input terminal 51 and the video output terminal 61 in accordance with a control signal notified from the CPU 10. The MUX 42 connects the audio input terminal 52 and the audio output terminal 62 in accordance with a control signal notified from the CPU 10. The MUX 41 and the MUX 42 correspond to the video input terminal 51 included in the separate input systems 50 with respect to the video output terminal 61 and the audio output terminal 62 constituting one output system 60 according to the control signal notified from the CPU 10. The audio input terminal 52 can be connected.

  Next, the switch matrix 20 will be described. FIG. 3 is a conceptual diagram schematically showing the configuration of the switch matrix 20. In FIG. 3, the switch matrix 20 is a connection release switch for releasing the connection between the input system 50 and the input system 50 and the output system 60 in the horizontal direction of the drawing, in which horizontal lines representing the output system 60 are arranged in the vertical direction of the drawing. Vertical lines representing OFF switches are arranged. FIG. 3 shows an example including four output systems 60 (OUT1 to OUT4) and eight input systems 50 (IN1 to IN8). In FIG. 3, when the intersection 200 of a vertical line and a horizontal line is connected, the input system 50 and the output system 60 are connected. In FIG. 3, connected intersections are denoted by reference numeral 201. For example, FIG. 3 shows a state in which the input system 50 (IN1) and the output system 60 (OUT1), and the input system 50 (IN2) and the output system 60 (OUT2) are connected.

  Note that the switch matrix 20 includes a switch related to a “connection state selection button” (hereinafter referred to as “connection state selection switch”) that is not illustrated in FIG. The connection state selection switch is a switch for selecting a connection state between the output system 60 and the input state 50, and the connection operation when the selection button is operated differs depending on the state of the switch, as will be described later.

  Returning to FIG. A selection button (not shown) is arranged at a position corresponding to each intersection 200. When a predetermined operation (for example, a pressing operation) is applied to this selection button, each switch (contact) arranged at the intersection 200 is changed. In operation, the CPU 10 is notified of a corresponding selection signal. This selection button and switch are collectively referred to as a “selection switch”.

  In the case of the switch matrix 20 shown in FIG. 3, in order to select four output systems 60 and eight output systems 60, selection switches are arranged corresponding to 32 (4 × 8) intersections 200. . In the switch matrix 20, one OFF switch having a switch for disconnecting the connection between each output system 60 and the input system 50 is arranged in the output system 60 one by one.

  Next, the monochromatic LED matrix 30 will be described. FIG. 4 is a diagram showing an example of the appearance of the monochromatic LED matrix 30 according to the present embodiment. Since the LED matrix 30 is disposed on the front surface of the matrix switcher 100, FIG. 4 is also a front view of the matrix switcher 100. In FIG. 4, a single-color LED matrix 30 is a selection switch 31 having an LED that displays the input system 50 connected to the output system 60, and a switch that disconnects (releases) the connection between the output system 60 and the input system 50. An OFF switch 32 having an LED indicating that the output system 60 is not turned on by lighting, and a connection state so that video signals and audio signals input from each input system 50 are output from separate output systems 60 And a SET key 33 which is a connection state selection switch for selecting.

  The selection switch 31 and the OFF switch 32 are covered with a cover made of a material that transmits light from each LED. By performing a predetermined operation on the cover, the switch operation of the switch matrix 20 corresponding to the selection switch 31 is performed.

  FIG. 4 shows an example of a lighting display state on the monochromatic LED matrix 30 immediately after operating power is supplied to the matrix switcher 100. As shown in FIG. 4, in each output system 60, the “all lighting” display indicating the connection with the input system 50 is only the OFF switch 32, and IN 1 to IN 8 are unlit. In the following description, when the video signal and the audio signal are in the connection state (first connection state) supplied from the same input system 50, that is, the output destination of the video signal and the audio signal is selected separately. The display in the single-color LED matrix 30 indicating the non-existing state is referred to as “all lit”, and the selection switch 31 and the OFF switch 32 are represented by being blacked out.

  In addition, when the video signal and the audio signal are selected separately, the display of the selection switch 31 and the OFF switch, in which only the video signal is selected, is also expressed using black fill.

  Further, when the video signal and the audio signal are in a connection state (second connection state) supplied from different input systems 50, that is, a monochromatic LED matrix indicating a state in which the audio signal and the video signal are separated and selected. The display at 30 is called “half-lit”, and the selection switch 31 and the OFF switch 32 are shaded.

  In the matrix switcher 100 according to the present embodiment, the display of the first connection state and the display when only the video signal is selected are “half lit”, and the display of the second connection state is “half lit”. Also good.

  The operation of the input system 50 and the output system 60 in the matrix switcher 100 will be described. When the selection switch 31 is pressed, the state of the contact 200 of the corresponding switch matrix 20 changes, and this change is transmitted to the CPU 10 as a selection signal. In other words, the CPU 10 detects the contact point 200 that changes when the selection switch 31 is pressed.

  In response to the selection signal (detection of a change in the state of the switch 200), the CPU 10 notifies the control signal to the MUX 40. Since the MUX 40 includes the selectors MUX 41 and MUX 42, the MUX 41 and the MUX 42 have the selected input system 50 for the operated output system 60 in accordance with the control signal notified from the CPU 10. Operates to be connected.

  Here, the MUX 40 will be described with reference to FIG. FIG. 5 is a conceptual diagram schematically showing the internal structure of the MUX 41 and the MUX 42 constituting the MUX 40. The selectors MUX41 and MUX42 are configured to be able to select connection lines from signal lines IN1 to IN8 included in the input system 50 and OUT1 to OUT4 included in the output system 60. FIG. 5 shows a state immediately after the matrix switcher 100 is turned on as shown in FIG. Dotted lines connecting IN1 to IN8 and OUT1 to OUT4 represent a state in which signal lines that can selectively connect each input system 50 and each output system 60 are not connected. That is, FIG. 5 shows a state where neither the input system 50 nor the output system 60 is connected.

  Next, an example of the display state of the monochromatic LED matrix 30 when the input system 50 connected to each output system 60 is selected using the SET key 33 together with the selection switch 31 and the OFF switch 32 will be described. First, FIG. 6 shows an example of a display state of the monochrome matrix 30 according to a state in which the video signal and the audio signal are supplied from the same input system 50 without being separated in each output system 60. In FIG. 6, “IN1” is connected to “OUT1”, “IN2” is connected to “OUT2”, “IN3” is connected to “OUT3”, and “OUT4” is “OFF”. The state where there is no signal to be displayed is displayed. In each output system 60, the state in which the video signal and the audio signal are supplied from the same input system 50 is displayed.

  An example of the connection state of the MUX 41 and the MUX 42 in the state shown in FIG. 6 is shown in FIG. In FIG. 7, a solid line connecting IN1 to IN8 and OUT1 to OUT4 indicates a state where the input system 50 and the output system 60 are connected. As shown in FIG. 7, the MUX 41 that connects video signals and the MUX 42 that connects audio signals are connected to “IN1” and “OUT1”, “IN2” and “OUT2”, “IN3”, and “OUT3”, respectively. Has been. Further, there is no input system 50 (IN1 to IN8) connected to “OUT4”.

  FIG. 8 shows an example of the display state of the single-color LED matrix 30 and shows a state in which the “IN1” selection switch 31 of “OUT2” is pressed while the SET key 33 is pressed from the state of FIG. Yes. Since the SET key 33 and the selection switch 31 are operated simultaneously, the audio signal output from the output system 60 related to “OUT2” is not input from the input system 50 related to “IN2”, but “IN1”. To be input to That is, when the selection switch 31 is operated simultaneously with the SET key 33, the video signal and audio signal input systems 50 can be selected separately.

  FIG. 8 shows a state in which the “OUT3” OFF switch 32 is pressed while the SET key 33 is pressed from the state of FIG. Since the SET key 33 and the selection switch 31 are operated simultaneously, the audio signal to the output system 60 related to “OUT3” is not input, that is, the audio signal is not output from “OUT3”. At this time, the state in which the video signal is output from “OUT3” is maintained.

  FIG. 8 shows a state in which “IN1” of “OUT4” is pressed while the SET key 33 is pressed from the state of FIG. Since the SET key 33 and the selection switch 31 are operated simultaneously, the video signal to the output system 60 related to “OUT4” is not input, that is, the video signal is not output from “OUT4”. At this time, the state in which the audio signal is output is maintained from “OUT4”.

  In FIG. 8, the selection switch that is fully lit is denoted by reference numeral 31a, and the selection switch that is half-lit is denoted by reference numeral 31b. Further, the OFF switch that is fully lit is denoted by reference numeral 32a, and the OFF switch that is half-lit is denoted by reference numeral 32b. Full lighting indicates that the video signal and the audio signal are selected, and half lighting indicates that only the audio signal is selected.

  As described above, when the selection switch 31 or the OFF switch 32 is pressed while pressing the SET key 33, the matrix switcher 100 outputs the video signal and the audio signal input from the separate input systems 50 from the one output system 60. The connection can be switched to the state to be performed. When the connection between the video signal and the audio signal is switched to another input system 50, the selection switch 31a indicating the video signal input system 50 is fully lit (first connection state), and the audio signal input system 50 is switched on. The selection switch 31b shown is in a semi-lighted state (second connection state).

  That is, in the selection switch 31 and the OFF switch 32 arranged in each output system 60 of the single color LED matrix 30, the video signal and the audio signal input system 50 are the same input system 50 as long as all the selection switches 31 a are lit. Thus, it can be easily recognized that the video signal and the audio signal are selected without being separated. In addition, in the selection switch 31 and the OFF switch 32 arranged in each output system 60, if the selection switch 31a that is fully lit and the selection switch 32a and OFF switch 32a that are lit half are mixed, a video signal and an audio signal are mixed. It can be easily recognized that the input system 50 is separated and selected. Also, the presence / absence of the input of the video signal and the audio signal and the input source can be recognized at a glance.

  Next, an example of a connection state between the MUX 41 and the MUX 42 in the state illustrated in FIG. 8 will be described. Of the connections between the input system 50 and the output system 60, FIG. 8A shows an example of the connection state of the MUX 41 that performs connection related to the video signal. FIG. 8B shows an example of the connection state of the MUX 42 that performs connection related to an audio signal.

  As shown in FIG. 9A, the MUX 41 for connecting video signals is connected to “IN1” and “OUT1”, “IN2” and “OUT2”, “IN3” and “OUT3”. There is no input system 50 (IN1 to IN8) connected to “OUT4”.

  Further, as shown in FIG. 9B, the MUX 42 to which the audio signal is connected is connected to “IN1” and “OUT1”, “IN1” and “OUT2”, “IN1” and “OUT4”.

  As described above, the matrix switcher 100 according to the present embodiment can set (switch) the output destinations of the video signal and the audio signal input from the input system 50 toward the different output systems 60. In other words, each output system 60 can set the input system 50 that is the input source of the video signal and the audio signal to different systems.

  The matrix switcher 100 according to the present embodiment has three connection states in the connection between the input system 50 and the output system 60. Specifically, the “first connection state” in which the video signal and the audio signal are connected in the same system, the “second connection state” in which the video signal and the audio signal are connected in different systems, the video signal and the audio signal This is a “third connection state” in which neither signal is connected from any system.

  The CPU 10 controls lighting of the single color LED matrix 30 according to the plurality of connection states. For this purpose, the CPU 10 outputs different display signals to the monochromatic LED matrix 30 according to the pressed state of the selection switch 31. FIG. 10 shows an example of a display signal output from the CPU 10 in the form of a timing chart.

  In the matrix switcher 100 according to the present embodiment, the display signal depends on the current supplied to the monochromatic LED. In FIG. 10A, when the display signal 91 is in the state of the symbol L, the single color LED is turned off. When the display signal 91 is in the state of symbol H, the single color LED is fully lit. After the timing T1 when the selection switch 31 is operated and the input system 50 of the video signal and the audio signal becomes the same input system 50, the CPU 10 continues to output the display signal 91 in the state of the symbol H. Since this display signal 91 indicates the state of the current supplied to the single color LED, if the display signal 91 is "H" and continues to be output from the CPU 10, the corresponding single color LED will continue to be lit and fully lit. It becomes. This state is the first connection state.

  At timing T2, when the SET key 32 and the selection switch 31 are operated and the video signal and audio signal input systems 50 are connected to different systems, the subsequent display signal 91 has “H” and “L” with a predetermined period. "Is repeated. The duty ratio of the display signal 91 at this time is a rectangular wave of about 20%, for example. When “H” and “L” are periodically repeated, the monochromatic LED repeatedly blinks in synchronization with this, so that it appears to the user to be lit dark. This state is the second connection state. Note that the duty ratio of the display signal 91 when displaying the second connection state may be appropriately set between about 10% and about 70%, and is not limited to about 20%.

  After that, when the selection switch 31 is operated and the OFF switch 32 is pressed at timing T3, the display is performed so that the LEDs “IN1” to “IN8” of the output system 60 corresponding to the OFF switch 32 are turned off. The signal 91 is output at the “L” level. This state is the third connection state.

  As described above, the matrix switcher 100 according to the present embodiment includes the LEDs of the single color LED matrix 30 that displays the input system 50 connected to the output system 60 according to the connection state of the output system 60 and the input system 50. At least three states can be expressed by changing the lighting state of the selection signal, which is the current supplied to the LED, as a PWM signal.

Another embodiment of the display signal will be described with reference to FIG. In FIG. 10B, the display signal 92 indicates the waveform of the current supplied by the CPU 10 from the monochromatic LED. When the display signal 92 is in the state of L, the single color LED is turned off. The symbol L in this case indicates a state in which no current is supplied.

When the display signal 92 is in the state of the sign H1, that is, if the supplied current is equal to or greater than a certain value, the single color LED is in a fully lit state. After the timing T1 when the selection switch 31 is operated and the input system 50 of the video signal and the audio signal becomes the same input system 50, the CPU 10 continues to output the display signal 92 in the state of the code H1. As a result, the corresponding single-color LED continues to be lit and becomes fully lit. This state is the first connection state.

  At timing T2, when the SET key 32 and the selection switch 31 are operated and the video signal and audio signal input systems 50 are connected to different systems, the subsequent display signal 92 shows a current having a value smaller than the symbol H1. It becomes the code H2. Since the current value of the code H2 is smaller than that of the code H1, the monochromatic LED appears to be lit dark.

  After that, when the selection switch 31 is operated and the OFF switch 32 is pressed at timing T3, the display is performed so that the LEDs “IN1” to “IN8” of the output system 60 corresponding to the OFF switch 32 are turned off. The signal 92 is output at the “L” level. This state is the third connection state.

  As described above, the matrix switcher 100 according to the present embodiment includes the LEDs of the single color LED matrix 30 that displays the input system 50 connected to the output system 60 according to the connection state of the output system 60 and the input system 50. At least three states can be represented by changing the value of the current supplied to the LED.

  As described above, the matrix switcher according to the present invention includes at least three or more including a state in which the video signal and the audio signal are connected to different systems in the connection between the input system 50 and the output system 60 using the single color LED. The connection state can be displayed so as to be visible.

  Next, another embodiment of the matrix switcher according to the present invention will be described focusing on portions different from the embodiment described above. The matrix switcher 100a according to the present embodiment includes another connection state selection switch that can be selected by switching the selection mode instead of the SET key 33.

  FIG. 11 is a front view showing an example of the appearance of the single color matrix 30a included in the matrix switcher 100a according to the present embodiment, and shows an example of the lighting display state of the single color LED matrix 30a immediately after the operation power of the matrix switcher 100a is turned on. Is shown.

  The single color LED matrix 30 a includes a “V / A switch 34” which is a connection state selection switch instead of the SET key 33. The V / A switch 34 is made of the same material as the selection button 31 and changes its lighting state by a pressing operation. When the input system 50 connected to each output system 60 is selected depending on the lighting state of the V / A switch 34, whether the video signal and the audio signal are the same input system 50 or only the video signal is selected. It is possible to easily visually recognize whether only the audio signal is selected or whether the switching selection is performed in any form.

  If the V / A switch 34 is “all lit”, the input system 50 having the same video signal and audio signal is connected to the output system 60 related to the selection switch 31 pressed at that time. When the V / A switch 34 is fully lit, it is referred to as “first connection mode”.

  If the V / A switch 34 is in the “half-lit state”, the output system 60 related to the selection switch 31 that is pressed at that time is connected to the input system 50 only for audio signals. When the V / A switch 34 is in a half-lit state, it is referred to as “second connection mode”.

  If the V / A switch 34 is in the “light-off state”, the output system 60 related to the selection switch 31 that is pressed at that time is connected to the input system 50 only for the video signal. The time when the V / A switch 34 is turned off is referred to as “third connection mode”.

  As shown in FIG. 11, the selection switches 31 related to IN1 to IN8 indicating the connection of each output system 60 to the input system 50 are all in the “light-off state”, and only the OFF switch 32 is in the “all light-up state”. This represents a state in which neither the video signal nor the audio signal from the input system 50 is selected for all the output systems 60.

  When the display of the V / A switch 34 is in the first connection mode (FIG. 11), when the selection switch 31 related to IN1 of OUT1 is pressed, the state shown in FIG. 12 is obtained. The state shown in FIG. 12 indicates that a video signal and an audio signal input from IN1 of the input system 50 are output from OUT1 of the output system 60. That is, OUT1 indicates that it is in the first connection state. As described above, when the selection switch 31 is operated when the V / A switch 34 is in the fully lit state (when in the first connection mode), the output is output from the output system 60 related to the operated selection switch 31. As a signal input source, the same input system 50 is selected (first connection state).

  When the display of the V / A switch 34 is in the first connection mode (FIG. 11), when the V / A switch 34 is pressed once, the display of the V / A switch 34 is changed to the second connection mode in a semi-lighted state. (FIG. 13). When the selection switch 31 related to IN1 of OUT4 is pressed in the state shown in FIG. 13, the state shown in FIG. 14 is obtained. At this time, IN1 of OUT4 is half-lit, and the OFF switch 32 of OUT4 remains fully lit.

  The state shown in FIG. 14 indicates that only an audio signal input from IN1 of the input system 50 is output from OUT4 of the output system 60, and no video signal is output. As described above, when the selection switch 31 is operated when the V / A switch 34 is in the half-lit state (when in the second connection mode), the output is output from the output system 60 related to the operated selection switch 31. Only the input source of the audio signal is selected (second connection state).

  In addition, when the V / A switch 34 is in the second connection mode in which the V / A switch 34 is half lit (FIG. 13), when the V / A switch 34 is pressed once, the V / A switch 34 enters the third connection mode in which it is turned off ( FIG. 15). When the selection switch 31 related to IN3 of OUT3 is pressed in the state shown in FIG. 15, the state shown in FIG. 16 is obtained. At this time, IN3 of OUT3 is fully lit, and the OFF switch 32 of OUT3 is half lit.

  The state shown in FIG. 16 indicates that only the video signal input from IN3 of the input system 50 is output from OUT3 of the output system 60, and no audio signal is output. As described above, when the selection switch 31 is operated when the V / A switch 34 is off (in the third connection mode), the video output from the output system 60 related to the operated selection switch 31. Only the signal input source is selected (third connection state).

  Further, with the V / A switch 34 selecting the connection mode, the selection switch 31 and the OFF switch 32 are selected to select the video signal and audio signal, only the video signal, or only the audio signal. It can be switched easily.

  In addition, the method of changing the lighting state of the selection switch 31, the OFF switch 32, and the V / A switch 34 is similar to the embodiment already described, and the selection signal that is the supply current to the LEDs of the monochrome LED matrix 30 is PWMed. Different luminances can be realized by changing the duty ratio as a signal or changing the value of the current supplied to the monochromatic LED as the selection signal.

  As described above, according to the matrix switcher according to the present embodiment, as the configuration in which any of the plurality of input systems 50 can be selectively connected to the output system 60, the input system 50 is connected to the video input terminal and the audio input. A switch matrix circuit 20 including a switch that selectively switches and connects the input system 50 connected to the output system 60, the output system 60 having a video output terminal and an audio output terminal. The single-color LED matrix circuit 30 that displays the state of the input system connected to the output system by the switch matrix circuit 20 by the lighting state of the single-color LED, the connection in the switch matrix circuit 20, and the lighting of the single-color LED in the single-color LED matrix circuit 30 A control unit (CPU 10) for controlling the state, and the control unit The video input terminal and audio input terminal included in the same input system 50 are connected to the video output terminal and audio input terminal of the output system 60 (first connection mode), and the video output terminal included in a different input system 50 And the audio output terminal are connected to the video output terminal and the audio input terminal of the output system 60, and only the output of the audio signal is selected (second connection mode), included in a different input system 50 The video output terminal and the audio output terminal are connected to the video output terminal and the audio input terminal of the output system 60, and only the output of the video signal is selected (third connection mode). It is characterized by making it.

  In addition, the matrix switcher according to the present embodiment includes a connection state selection switch that displays a plurality of connection modes, and the control unit determines the lighting state of the single color LED related to the connection state selection switch, the first connection mode, and the first connection mode. The second connection mode and the third connection mode are differentiated so as to be distinguishable.

  As described above, the matrix switcher according to the present invention includes at least three or more including a state in which the video signal and the audio signal are connected to different systems in the connection between the input system 50 and the output system 60 using the single color LED. The connection state can be displayed so as to be visible, and the selection operation can be easily performed.

10 CPU
20 switch matrix 30 single color LED matrix 31 selection switch 32 OFF switch 33 SET key 34 V / A switch 40 MUX
50 Input system 50
60 Output system 60

Claims (12)

A matrix switcher that selectively connects one of a plurality of input systems to an output system,
A switch matrix circuit comprising switches for selectively switching and connecting the input system connected to the output system;
A monochromatic LED matrix circuit that displays the connection state of the output system and the input system by the lighting state of the monochromatic LED;
A control unit for controlling the connection state in the switch matrix circuit and the lighting state of the single color LED in the single color LED matrix circuit;
The control unit
The lighting state of the monochromatic LED in the connection state (hereinafter referred to as “first connection state”) in which the video signal and the audio signal output from the output system are the video signal and the audio signal input from the same input system;
The lighting state of the monochromatic LED in a connection state (hereinafter referred to as “second connection state”) in which the video signal and the audio signal are input from different input systems in which the video signal and the audio signal output from the output system are different from each other; Matrix switcher characterized by different The switch matrix circuit is
A selection switch corresponding to the input system connectable to the output system;
A connection state selection switch for selecting a connection state between the output system and the input system;
The control unit
2. The control according to claim 1, wherein whether the connection state of the switch by the operation of the selection switch is set to the first connection state or the second connection state is controlled according to an operation state of the connection state selection switch. Matrix switcher. The switch matrix circuit is
A selection switch corresponding to the input system connectable to the output system;
A connection state selection switch for selecting a connection state between the output system and the input system;
The control unit
The connection state in the switch matrix circuit is controlled so that an output system related to the selection switch is in the second connection state when the connection state selection switch and the selection switch are operated simultaneously. Matrix switcher. The switch matrix circuit is
A selection switch corresponding to the input system connectable to the output system;
A connection state selection switch for selecting a connection state between the output system and the input system;
The control unit
The connection state in the switch matrix circuit is controlled so that an output system related to the selection switch is in the first connection state when the connection state selection switch and the selection switch are operated simultaneously. Matrix switcher. The switch matrix circuit is
A selection switch corresponding to the input system connectable to the output system;
A connection state selection switch for selecting a connection state between the output system and the input system;
The control unit
If the state of the connection state selection switch operated before the selection switch is operated is a mode related to the first connection state (hereinafter referred to as “first connection mode”), then the selection switch When the is operated, the output system related to the selection switch is in the first connection state,
Further, if the state of the connection state selection switch operated before the selection switch is operated is a mode related to the second connection state (hereinafter referred to as “second connection mode”), then the above-described operation is performed. The matrix switcher according to claim 1, wherein when the selection switch is operated, a connection state in the switch matrix circuit is controlled so that an output system related to the selection switch is in the second connection state. The control unit
In the first connection state, the single color LED is fully lit,
2. The matrix switcher according to claim 1, wherein in the second connection state, the monochromatic LED is mixed with full lighting and half lighting. The control unit
In the first connection state, the single color LED is a mixture of full lighting and half lighting,
2. The matrix switcher according to claim 1, wherein in the second connection state, the single color LED is fully lit. 3. The control unit
8. The matrix switcher according to claim 6, wherein the current supplied to the single color LED is controlled to control whether the single color LED is fully lit or half lit. The control unit
In the full lighting, a current of a certain value or more is supplied to the monochromatic LED,
9. The matrix switcher according to claim 8, wherein in the half-lighting, a current that fluctuates in a pulse shape is supplied to the monochromatic LED.   10. The matrix switcher according to claim 9, wherein the pulse width of the current supplied to the monochromatic LED that is half-lit by the control unit has a duty ratio of approximately 0.1 to approximately 0.7. The control unit
In the full lighting, a current of a certain value or more is supplied to the monochromatic LED,
9. The matrix switcher according to claim 8, wherein in the half-lighting, a current having a value smaller than the certain value is supplied to the monochromatic LED. The switch matrix circuit has a connection release switch for releasing the connection with the input system in the output system,
The control unit
The matrix switcher according to any one of claims 1 to 11, wherein when the input system is not connected to the output system, the monochromatic LED corresponding to the connection release switch is turned on.

Images