JP2760444B2 - Remote control receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION The present invention relates to a wireless remote control, in which a remote control transmitter is installed at two or more locations, particularly in a video projector, and the remote control sender is located in any position (in another room, etc.). TECHNICAL FIELD The present invention relates to a remote control receiver for enabling operation of a device with a remote controller.

2. Description of the Related Art In recent years, wireless remote controllers have been used for various electronic appliances. For example, a television, a VTR, a stereo, an air conditioner, and the like. As a result, if you operate the buttons on the remote control transmitter from a distance, even if you do not approach the appliance, the appliance will operate as you want.

FIG. 3 shows the configuration of a conventional wireless remote controller. First, signals "0, 1,..." Differing from the type of operation buttons are modulated from the remote controller transmitter 1, and emitted as light signals from the light emitting diodes into the air. The optical signal travels straight and reaches the remote control receiver. First, an optical signal is input to the photodiode 2 shown in FIG. 3, where it is converted into an electric signal, which is filtered and amplified by the amplifier 3 to reproduce a signal of "0, 1,...". The output is decoded by the microcomputer 6 to determine which operation button of the remote control transmitter 1 has been pressed and to control each control circuit.

Here, the current TV or VTR is placed on the front of the person who operates the remote control, and the remote control transmitter transmits to the front TV or the like, and if it transmits to the remote control receiver installed on the front of the TV etc. The light signal reaches.

By the way, in the video projector, conventionally, the remote control receiver 20 has to be arranged on the front surface (screen side) of the video projector main body 21 shown in FIG. The video viewer 24 must then step out to operate the remote control transmitter 22 (23 persons). When the output of the remote control transmitter 22 is strong at the image viewer 24 (the voltage of the built-in battery is high), the signal can be reflected to the screen 26 and sent to the remote control receiver 20. Is generally several meters, and the reach of the optical signal is doubled, so that the reliability is deteriorated. When used in a conference room or the like, the video projector main body is often placed in another room. At that time, the screen 26 is of a transmissive type, and the image viewer in FIG.
21 and the reflection position, and the remote control transmitter 22 cannot be operated with respect to the remote control receiving device 20.

Problems to be Solved by the Invention As described above, conventionally, there has been a problem that a video viewer moves to operate the remote control transmitter, or the remote control transmitter cannot be used.

The present invention solves the above problems, and enables an optical signal to be transmitted to a remote control receiving device connected to a device by turning the remote control transmitter to the front while watching a video wherever a person operating the remote control transmitter is located. An apparatus is provided.

Means for Solving the Problems A remote control receiving apparatus according to the present invention receives a light signal emitted from a remote control transmitter and converts the light signal into an electric signal, and outputs an electric signal of the first light receiving element. A first switching element, a second light receiving element for receiving an optical signal from the remote control transmitter, and a second switching element for outputting an electric signal of the second light receiving element; , A gable and a connector are connected to one of the output terminals of the second switching element, and the output terminal of the first or second switching element is connected to the output terminal of the first or second switching element via this connector to provide a remote control signal receiving / decoding circuit. It is characterized in that it is connected.

The present invention is applicable to a small movie theater or the like, even if a person who operates a remote control is located on the opposite side of a screen or a rear side of a video projector from a position where a video projector main body having a remote control receiving device is present. It is possible to provide a remote control receiver that can be used even when moving from one place to another by simply wiring a simple remote control receiver with a cable even from another room several tens of meters away from the projector body. is there.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a circuit diagram of a remote control receiver according to one embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a remote control transmitter, and an optical signal output from the remote control transmitter 1 enters a first photodiode 2 constituting a first remote control receiver, and is converted into an electric signal. Filtered by 3 and further amplified. Then, the code signal becomes "0, 1 ...". The signal is further amplified by the transistor 4 and input to the microcomputer 6 through the emitter resistor 7.

Here, in this configuration, a second remote control receiving device is provided separately from the first remote control receiving device described above. It is assumed that the optical signal from the remote control transmitter 1 has reached the second photodiode 11 which is the second remote control receiver. As before, the signal passes through amplifier 12 and enters transistor 13.
The emitter of the transistor 13, the power supply terminal 5 'and the ground are connected to the emitter of the transistor 4, the power supply 5 and the ground via a jack 10 as a connection connector and a jack 9 in the first remote control receiver.

Then, the first photodiode and the second photodiode
Although the optical signal of the remote control transmitter 1 is received by the diode 11 in either case, it is unlikely that the optical signal is input to the microcomputer 6 at the same time. As a result, the higher voltage signal of the emitter of the transistor 4 and the output of the emitter of the transistor 13 is selected and appears as a voltage on the resistor 7, so that the signals do not collide at the same time and the output is not lost. When the cable 14 is used, the microcomputer operates sufficiently even if the cable is extended to several tens of meters because the current is amplified by the transistor 13. Therefore, even if the second remote control receiving device is installed in a room different from the room where the video projector main body is stored, or even when the viewer views the screen such as a video theater from a remote place, it is sufficient. Thus, the video projector main body can be controlled with a remote controller.

 FIG. 2 shows a specific example.

FIG. 2C shows a second remote control receiving device 15 comprising a photodiode 11, an amplifier 12 and a transistor 13 which is rotatably mounted on an adhesive 17 or a support 16 having a means capable of bonding. As shown in FIG. 2A, the second remote control receiving device 15 can be moved to a position B or C on the opposite side of the upper or lower portion of the screen 26 or the screen as shown in FIG.
A point C 'on the side of the projector main body 21 below the point 26, a point D on the rear lower surface of the projector main body 21 and a point E in a separate control room, and a rear part when the projector main body 21 is placed on the floor as shown in FIG. 2B. It can be arranged freely, such as point F,
It is possible to operate the remote controller at an optimum place regardless of the distance and position without malfunction. The point A in FIG.
The installation point of the remote control receiver of FIG.

Effects of the Invention As described above, according to the present invention, even if the position of the video projector main body is suspended from the ceiling or placed on the floor,
Further, even if the image viewer is on the opposite side of the screen or in the control room of another room, the remote control can be operated from each position, and malfunction does not occur. If the second remote control receiving device becomes unnecessary, the jack connected to the main body of the video projector may be omitted.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a remote control receiver according to an embodiment of the present invention, FIGS. 2A and 2B are configuration diagrams showing an application example, FIG. 2C is a side view showing an embodiment of the remote control receiver, FIG. FIG. 1 is a circuit diagram of a conventional remote control receiver, and FIG. 4 is a block diagram showing an example of its use. 1 ... remote control transmitter, 2, 11 ... photodiode (light receiving element), 3, 12 ... amplifier, 4, 13 ... transistor, 5
... power supply, 6 ... microcomputer, 7 ... resistance,
9,10… Connector (jack), 14… Cable.

Claims (2)

(57) [Claims] 1. A plurality of light receiving units for receiving an optical signal emitted from a remote control transmitter, cables and connectors connected to several output terminals of the plurality of light receiving units, and outputs of the plurality of light receiving units. A decoding circuit for receiving a remote control signal generated in a load serving as a common load at an end; a light receiving element for receiving an optical signal to the plurality of light receiving units and converting the light signal to an electric signal; and amplifying the electric signal of the light receiving element. A remote control receiving device provided with a switching element for switching from a plurality of remote locations. 2. The remote control receiver according to claim 1, wherein some of the light receiving units are housed in a housing and are mounted on a support base so as to change the angle.