JPH0662268A - Remote controller - Google Patents

Abstract

PURPOSE:To improve operability by retransmitting signals from a remote control light reception part to a projective display device by using anoptical space transmission/reception unit again. CONSTITUTION:The signal from a remote controller 42 of a VP is received by a light reception part 1, the signal is modulated to a 1MHz band again by a modulation part 2, the output is converted to light by a light transmission part 3, and the light is transmitted to the VP side. When the optical signal is received by a reception part 4 on the VP side, it is converted to an electric signal and outputted to a demodulation part 5. At the demodulation part 5, the remote control signal modulated to the 1MHz band is demodulated so as to return to a base band, and either that signal of a remote control base band signal from a light reception part 6 is selected by a previously decided switching circuit 7 and outputted to a microcomputer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control device for easily connecting and operating an AV source device such as a VTR, a laser disc player (LDP) or a BS tuner with a large screen image.

[0002]

2. Description of the Related Art In recent years, AV equipment has been systematized in combination with enhancement of source equipment such as VTR, LDP and BS, enhancement of package software such as movies, and large screen orientation of television. On the other hand, the number of remote controllers has increased due to the remote control (remote control) of each AV device, and the operation thereof has become complicated as new functions are added.

FIG. 6 shows an example of the configuration of a general AV system. In the figure, 31 is the first VTR, 32 is its remote controller,
33 is the second VTR, 34 is its remote control, 35 is L
DP is a remote controller 36, 37 is a BS tuner, 38 is a remote controller, 39 is an AV amplifier, which has the built-in selection of each source device, audio control and power amplifier, and 41 is an AV amplifier. A video projector (VP) for receiving and enlarging and projecting the generated video signal, 42 is its remote controller, 43 is a screen for displaying the enlarged and projected image of the VP, and 45 and 46 are speakers for outputting audio from the AV amplifier. is there. In FIG. 6, the number of remote controllers is as many as six, and it is considered that there are very few people who can immediately operate what they want.

FIG. 7 shows an installation example using a projection type VP. Reference numeral 47 is an AV rack capable of putting in and taking out the screen 43 for accommodating various devices, 48 is a set stand for mounting a VP, 5
Reference numeral 1 is a learning remote controller that stores remote control signals of devices of various companies, and 49 is a video cable that supplies a video signal.

With the learning remote controller as shown in FIG. 7, a plurality of remote controllers can be integrated into one remote controller to facilitate the operation. Video cable 4 with VP41
9 is being transmitted by optical transmission, and studies are underway to make it cableless.

First, in the optical space transmission, as shown in FIG. 8, a video signal is converted to a frequency above 6 MHz by a frequency multiplexing system and transmitted. In the normal remote control signal, the carrier frequency is used in the vicinity of about 36 KHz, but in the present invention, the 1 MHz band which is currently in the direction of standardization is used, so that there is no interference with the existing remote control signal. There is. Four types of carriers are also provided, and two channels are prepared in full duplex in both directions.

FIG. 9 shows a video signal transmission block. In the figure, 21 is a modulator for frequency-modulating a video signal, 22 is a light transmitter for receiving the output of the modulator 21, and converting it to light. 23 is an optical signal received from the light transmitter and converted into an electrical signal. A light receiving unit 24 for conversion is a demodulation unit for receiving an electric signal from the light receiving unit 23 and demodulating it into a video signal. By providing this video signal transmission unit, cableless can be realized.

[0008]

However, when operating the source device, there is no problem if the source device is in the same direction, but in the case of a projection type display device, in this case, when looking at VP, the direction of the remote controller is different, and the remote controller light receiving device of VP41 is received. If the part is arranged under the lens, it may be behind the VP 41 depending on the position to be seen, and there is a problem that the operation becomes more difficult. In view of the above problems, the present invention provides a remote control device that can control a VP even if the remote controller is always operated in the screen direction regardless of the operation position of the remote controller.

[0009]

In order to solve the above-mentioned problems, the remote control device of the present invention transmits the image in the optical space after the remote control of the VP is once received by the AV device side to form the baseband signal. It is used to retransmit from the AV equipment side to the VP side by the optical transmission transmission unit using a wavelength different from the transmission wavelength of the remote control, and is received by the optical transmission reception unit provided on the VP side, and the output is the remote control reception signal of the VP. By doing so, it is possible to control a VP having a different direction simply by operating the remote controller of the VP toward the AV device side.

[0010]

With the above-described structure of the present invention, in a system in which the operability is improved by a learning remote controller,
In addition, you can operate without worrying about the position of the device.

[0011]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of optical space transmission according to an embodiment of the present invention. Since the video signal is described in the conventional example, it will be omitted. 1 in the figure
Is a light receiving section for receiving a remote control signal from the VP remote control 42 and demodulating it into a base band signal, and 2 is a modulation for re-modulating the remote control base band signal from the light receiving section again using a frequency different from the modulation frequency of the remote control 42. Similarly, the unit 3 is an optical transmission unit that converts the light into light and transmits the light. The modulator 2 and the light transmitter 3 serve as a transmission unit on the AV device side.

Reference numeral 4 is a light receiving section for receiving an optical signal transmitted from the transmitting unit and converting it into an electric signal, and 5 is a demodulating section for demodulating the signal from the light receiving section 4 into a remote control baseband signal. Reference numeral 6 is an ordinary light receiving section, and 7 is a switching circuit for switching the remote control signals of the demodulation section 5 and the light receiving section 6. The light receiving unit 4 and the demodulating unit 5 are on the VP side and are a receiving unit.

The operation of the optical space transmission apparatus configured as described above will be described below.

In such a configuration, the light receiving unit 1 receives a signal from the VP remote controller 42, the modulation unit 2 modulates the signal again into the 1 MHz band, and the light transmitting unit 3 converts the output into light. And sends it to the VP side. On the VP side, when the light receiving unit 4 receives an optical signal, it converts it into an electric signal and outputs it to the demodulation unit 5. In the demodulation section 5, the remote control signal modulated in the 1 MHz band is demodulated to return to the base band, and either the remote control base band signal from the light receiving section 6 or a predetermined switching circuit 7 selects one and outputs it to the microcomputer. .

As described above, by retransmitting the remote control signal received by the AV device side in the optical space, the user can use the remote control A even if the device is installed in a different place.
The same operation can be performed in the same direction as the V device. There are various types of remote control signals, but they differ depending on the manufacturer and device and can be identified by the microcomputer, so there is no risk of malfunction.

The switching circuit 7 may be switched to b only when the optical space transmission is used, or the switching circuit may be set to b when the receiving unit is mounted in a separate housing.

(Embodiment 2) Since a space is used in optical transmission, if some kind of shield is generated, control may become impossible. Therefore, it is necessary to detect whether or not this is shielded. As a method therefor, it is conceivable that the VP side returns a reception OK when it receives a remote control signal. For this purpose, it is necessary to negotiate the two parties' commitments. The present invention provides a device that does not require it.

FIG. 2 shows a block diagram of the second embodiment. In the figure, 1 to 6 are the same as those in the first embodiment, but the output of the light receiving section is directly input to the microcomputer, and the input of the modulation section 2 is the output of the microcomputer. A switching circuit 7 has the same function as that of the first embodiment, and outputs the output of the demodulation unit 5 as it is. Reference numeral 8 is a modulator having the same function as the modulator 2 with the output of the switching circuit 7 as an input, but a different modulation frequency, and 9 is a light receiving portion similar to the light transmitting portion 3. Reference numeral 10 is the same light receiving portion as the light receiving portion 4, and 11 is also a demodulating portion for demodulating signals having different modulation frequencies. Reference numeral 12 is a microcomputer which receives a remote control signal from the light receiving section 1 and processes it according to the signal, and transmits a specific code through the modulation section 2 to monitor the optical transmission path, and an input signal from the demodulation section 11. It is also a microcomputer that compares and confirms whether there is an abnormality in the transmission path. Reference numeral 13 is an OR gate for passing the signal of the light receiving unit 1 and the signal from the microcomputer 12.

Here, the modulator 2, the light transmitter 3, the light receiver 10,
The demodulation unit 11 will be referred to as a transmission unit, and the light receiving unit 4, the demodulation unit 5, the modulation unit 8, and the light transmission unit 9 will be referred to as a reception unit.

The operation of the optical space transmission apparatus configured as described above will be described below.

The signal from the light receiving section 1 is similar to that of the first embodiment, but another set of the same configuration is prepared and is bidirectional. Further, the signal to be monitored is sent back as it is from the transmitting unit by the switching circuit 7, and the microcomputer 12 can always compare the signals to confirm the presence or absence of interruption.

In this case, if a specific code is also output from the microcomputer 12 so that it can be confirmed even when there is no remote control signal, no signal will be returned even if the power is turned off on the VP side, and after a while the AV equipment It is also possible to turn off the power to the side.

It is also possible to retransmit a few times if an interruption is detected to make the operation more reliable.

As described above, it is possible to ensure the monitoring of data transmission only by adding the switching circuit 7 without imposing an excessive burden on the VP side. The switching circuit 7 has a switch section that can be switched to the light receiving section 6 by inserting it like a headphone stereo jack.
When using the VP alone, the output of the light receiving unit 6 is input to the VP microcomputer.

(Embodiment 3) In the case of a front projection type display device,
If the size of the screen is decided, the positional relationship is inevitably decided. Therefore, by adjusting the positional relationship of transmission and reception of optical transmission based on this positional relationship, the complexity of adjustment can be eliminated. FIG. 4 shows an embodiment of the present invention.

As shown in FIG.
By opposing the V rack 47 side and the VP 421 side, it is only necessary to bring the VP image to the optimum screen. By doing so, it is possible to eliminate the trouble of wiring at the time of installation and the troublesome wiring.

Further, as shown in FIG. 5, the light receiving unit can be incorporated in the VP set stand, and the load on the VP can be reduced.

(Embodiment 4) If the space for optical transmission cannot be secured due to the installation location or the like, it is also important to connect or not connect a control cable in order to retain the function even by wire. FIG. 5 is a diagram showing a case where the control signals are connected by wire.

In the figure, reference numeral 15 is an open collector drive transistor for driving a data signal, 16 and 17 are connection cables for connecting between the AV listening and VP, and 18 is a pull-up which serves as power supply and load resistance of the open collector transistor 15. A resistor, 19 is a buffer for receiving a looped control signal and shaping the waveform, and 20 is a level detecting buffer for converting whether a connection cable is connected by a load resistor into a voltage level.

In the above circuit, unless the connecting cables 16 to 17 are connected, the pull-up resistor 18 naturally does not cause the power supply voltage, and the microcomputer is left unconnected, and if connected, the power supply voltage is supplied. The detection buffer 20 outputs a signal indicating that it is connected to the microcomputer.

By detecting the presence or absence of the connection in this way, the operation of the system can be switched between the normal mode and the simple mode without burdening the user.

[0033]

As described above, according to the present invention, in the projection type display device, even if the position where the source device is installed is different, the projection type display device is aimed at the AV device or the AV rack regardless of the position of the display device. You can control the display device such as VP at different positions by just operating the remote controller with the remote controller, and if the AV rack and the screen become one,
Only by storing the optical free space transmission unit of the present invention in a specific position, it is possible to save the trouble of installation and adjustment.

Further, even if the data is shielded by some factor in the transmission space, the detection means is provided for more reliable transmission.

[Brief description of drawings]

FIG. 1 is a transmission block diagram of data transmission according to a first embodiment of the present invention.

FIG. 2 is a block diagram of transmission / reception of data transmission in the second embodiment of the present invention.

FIG. 3 is a system diagram showing an arrangement of transmitting / receiving units according to a third embodiment of the present invention.

FIG. 4 is a system diagram in which a receiving unit according to a fourth embodiment of the present invention is incorporated in a set table.

FIG. 5 is a diagram showing a wired system according to an embodiment of the present invention.

FIG. 6 is a block diagram showing a conventional AV system.

FIG. 7 is a block diagram showing a conventional AV system.

FIG. 8 is a diagram showing a signal arrangement by frequency multiplexing of optical transmission.

FIG. 9 is a block diagram showing a state of optical space image transmission.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light receiving part 2 Modulating part 3 Optical transmitting part 4, 6 Light receiving part 5 Demodulating part

Claims (8)

[Claims] 1. A control signal transmitting unit having a modulating unit for modulating a control signal, a light transmitting unit for converting an output of the modulating unit into light and transmitting the light, and a control signal optically modulated from the control signal transmitting unit. A remote control device comprising a video signal receiving unit having a light receiving means for receiving and converting into an electric signal, and a demodulating means for demodulating an output from the light receiving means to reproduce a control signal. 2. An optical modulator, comprising: first modulating means for modulating a first control signal; and first light transmitting means for converting an output of the first modulating means into light and transmitting the light. A light receiving means for receiving the generated second control signal and converting it into an electric signal; a control signal transmitting unit having demodulating means for demodulating an output of the light receiving means to obtain a second control signal; Second light receiving means for receiving the first modulated optical control signal from the unit and converting it into an electric signal; and second for demodulating the output from the second light receiving means to reproduce the first control signal. And a demodulating means, and a control signal receiving unit having a modulating means for modulating the second control signal and a light transmitting means for converting the output of the modulating means into light and transmitting the light. 3. A second light receiving means for receiving the first modulated optical control signal from the control signal transmission unit and converting it into an electric signal, and a first light receiving means for demodulating an output from the second light receiving means. Control signal receiving unit that has a second demodulating unit for reproducing the control signal, and a control unit for modulating the second control signal, and a light transmitting unit for converting the output of the modulating unit into light and transmitting the light. 2. The control signal receiving unit according to claim 1, wherein the first control signal is used as a second control signal while the output of the second demodulation means is output in the unit. 4. A first modulation means for modulating a video signal,
A first that converts the output of the first modulator into light and transmits the light
A video transmission unit having a light transmission means, a light receiving means for receiving a light-modulated video signal from the transmission unit and converting it into an electric signal, and demodulating an output from the light receiving means to reproduce the video signal. A remote control device comprising the video receiving unit according to claim 1, 2 or 3 having demodulation means. 5. A light receiving means for receiving a first modulated optical control signal from a video signal transmitting unit and converting it into an electric signal, and demodulating an output from the light receiving means to reproduce the first control signal. A video receiving unit having demodulation means and modulating means for modulating the second control signal, and light transmitting means for converting the output of the modulating means into light and transmitting the light, and a first video receiving unit from the video receiving unit. In a display device having an input means for inputting a control signal and an output means for outputting a second control signal, the first input control signal and the second output control signal are connected in the display device and the same control is performed. A display device characterized by being a signal. 6. An accommodating means existing in an AV rack for accommodating various AV devices together with the video signal transmitting unit having a display screen, and a video signal for receiving and processing an optical transmission signal from the video signal transmitting unit. An accommodating means for accommodating the receiving unit in the projection type display device is provided, and the AV
A remote control characterized in that the video signal transmitting unit and the video signal receiving unit are respectively housed so that they are located at optimum positions when they are installed at positions necessary for projecting toward a screen provided on a rack. apparatus. 7. A set base having a structure for accommodating a display device, comprising: means for accommodating the video signal receiving unit according to claim 5; and connection means for connecting to the display device. Remote control device. 8. A device for transmitting and receiving a video signal, a first control signal and a second control signal by wire in claim 2, wherein the first control signal is transmitted to the second control signal on the side receiving the video signal. On the side of transmitting the video signal, the return means for making the control signal, the transmitting means for transmitting the first control signal, the open driving means which receives no power supply, and the receiving means for receiving the second control signal As the first drive unit, the power supply unit supplies power to the first drive unit.
The control signal transmitting side has a discriminating means for discriminating whether or not it is connected by wire by the presence or absence of power supply, and the first control signal surely becomes the second control signal on the video signal receiving unit side. The remote control device is characterized in that the connection can be confirmed by returning to the video signal transmission unit side.