JPH0720785U - Remote control optical output directional characteristic variable device - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention aims to reduce the power consumption of a remote controller. An electric device including at least a radio and a television is provided with a small number of infrared light receiving parts 1, and a remote controller which is detachable by an operating part of the electric device is provided with a plurality of infrared light emitting parts 2 for transmitting to the infrared light receiving part 1. The infrared ray emitting section 2 has a small directivity to the infrared ray receiving section 1 only when the remote control is attached, and a small directivity to the infrared ray receiving section 1 when the remote control is detached, and has a wide directivity to the infrared ray receiving section 1. It is composed of a large number of infrared ray emitting sections D1 and D3, and the infrared ray emitting section D2 is also added for transmission.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a remote controller, which is a detachable operation unit using infrared rays for radios, televisions, etc., and particularly relates to a reduction in power consumption used in the remote controller.

[0002]

[Prior art]

 Conventionally, as a technique in such a field, there is one described in Japanese Patent Laid-Open No. 4-47798. The infrared remote control described therein is attached to an electric device for the purpose of downsizing the electric device to which the remote control is attached and detached.

[0003]

[Problems to be solved by the device]

 By the way, the remote controller is usually supplied with electric power by a battery so that it can be used even when it is detached from the electric device (main body). When the remote control is separated from the main body, it is desirable that the infrared receiver on the main body side can receive normally regardless of the position of the remote control. Therefore, in order to increase the light output with wide directivity, a plurality of infrared LEDs for transmission are turned on on the remote control side (transmission unit). In this case, power consumption is large. On the other hand, when the remote control is mounted on the main body, the positional relationship between the remote control and the main body is fixed and the distance between them is small. Therefore, the remote control transmitter has a narrow pointing characteristic and does not need to have a strong optical output, so that only a small number of infrared LEDs for transmission are required. In this case, power consumption is small. In-vehicle radios, television receivers, and other remote controls are usually mounted on the main unit, and in applications where the remote control is sometimes used away from the main unit, the remote control can be mounted on the main unit by using the remote control even when mounting the remote control. The number of infrared LEDs to be turned on is the same whether they are turned on or off, so there is a problem that the battery is wasted and its life is shortened.

Therefore, in view of the above problems, it is an object of the present invention to provide a remote controller that can reduce power consumption.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a small number of infrared ray receiving units in an electric device including at least a radio and a television, and a remote controller detachable from an operating unit of the electric device has a small number of infrared ray receiving units. It is equipped with a plurality of infrared ray emitting parts for transmitting to only one of the infrared ray emitting parts, and the plurality of infrared ray emitting parts transmits only when the remote controller is attached And a large number of infrared ray emitting portions having wide directivity with respect to the small number of infrared ray receiving portions. The switch is adapted to permit the transmission of the large number of infrared ray emitting parts when the remote controller is detached and prohibit it when the remote controller is mounted.

[0006]

[Action]

 According to the remote control optical output directional characteristic changing device of the present invention, the plurality of infrared ray emitting sections are permitted to transmit, but the large number of infrared ray emitting sections are prohibited from transmitting when mounted. As described above, a small number of infrared ray emitting parts of the remote control that are allowed to transmit have a small distance between the infrared ray receiving part of the electric device and the infrared ray emitting part of the remote controller when mounted, and the directivity of each infrared ray emitting part itself is narrow. However, this is because the aim for the infrared light receiving part can be set accurately. On the other hand, at the time of departure, both the small number of infrared ray emitting parts and the large number of infrared ray emitting parts are permitted to transmit. In this way, the large number of infrared ray emitting parts of the remote control that are permitted to transmit means that the distance between the infrared ray receiving part of the electric equipment and the infrared ray emitting part of the remote control is large when the remote control is disconnected, and similarly the directivity of each infrared ray emitting part itself is narrow. In order to secure the operability of the remote control with an accurate aim, it is necessary to secure wide directivity. In this way, it becomes possible to transmit with only a small number of infrared light emitting parts when mounted, and it is possible to reduce the power consumption of the infrared light emitting parts and extend the life of the battery compared to the conventional case.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a remote control optical output directivity varying device according to an embodiment of the present invention. As shown in the figure, the remote control light output directional characteristic changing device includes an infrared light receiving LED 1 provided in an opening 10 of a main body which is an electric device, and a plurality of remote control light transmitting LEDs provided in an opening 20 of the remote control. An infrared light emitting LED group 2 including infrared light emitting LEDs (D1, D2, D3), a switch 3 provided on the remote control side for detecting attachment / detachment of the main body and the remote control, and a switch provided on the main body side And a projection 3-1. In this example, the infrared light emitting LED (D2) is turned on when mounted, facing the infrared light receiving LED1, and the infrared light emitting LEDs (D1, D3) are arranged so as to have a wide directivity and are turned on only when detached.

FIG. 2 is a diagram showing a configuration of an electric circuit in the remote control light output directivity varying device of FIG. As shown in the figure, the electric circuit of the remote control light output directional characteristic changing device has an electric current consisting of the infrared ray emitting LED group 2 and resistors R1, R2 and R3 for controlling the current flowing through these infrared ray emitting LEDs. A limiting circuit 4, a 3 volt battery 5 for supplying a current to the infrared light emitting LED group 2 via the current limiting circuit 4, and a current flow from the battery 5 to the infrared light emitting LED group 2 Switch for switching transistors Tr1, Tr2, and Tr3, and resistors R5, R6, and R7 connected to their bases respectively, and a switch for simultaneously energizing and interrupting current to only infrared rays D1 and D3. A switch circuit 6 including a transistor Tr4 for power supply and a power supply from a battery 5 for creating transmission data of the remote controller for switching the switch circuit 6 The remote controller control circuit 7 for controlling on / off of the transistors Tr1, Tr2, Tr3, the resistor R4 between the battery 5 and the base of the switching transistor Tr4, and the switch 3 are attached and detached. An attachment / detachment detection circuit 8 for detecting is provided. In this example, R1 = R2 = R3.

In order to detect whether or not the remote control is attached to the main body, first, the switch 3 is turned off when the protrusion 3-1 of the main body is detached, and the switch 3 is turned on when the remote control is attached. Therefore, in the attachment / detachment detection circuit 8, the switching transistor Tr4 is turned on when the switch 3 is turned off due to the detachment of the remote controller, and the remote control circuit 7 receives a signal for turning on the switching transistors Tr1, Tr2, and Tr3. The infrared emitting LEDs (D1, D2 and D3) are turned on. Therefore, when the remote control is away from the main body, all infrared emitting LEDs (D1, D2 and D3) can be turned on, and the light output and its directional characteristics are strong and wide by combining the solid line and the dotted line in FIG. . Further, in the attachment / detachment detection circuit 8, when the switch 3 is turned off by mounting the remote controller, the switching transistor Tr4 is turned off, and even if a signal for turning on the switch circuit 6 is received from the remote controller control circuit 7, the infrared emitting LED (D2) is turned on. Only the light can be turned on, and the light output and its directional characteristics become narrow and weak as shown by the dotted line in FIG. In this way, the number of the infrared emitting LEDs that are turned on changes depending on whether the remote control is attached or detached, and the light output and directional characteristics thereof also change. The wide directional characteristics when detached increases the degree of freedom in the position of the remote control. When mounted, even if the directional characteristics of the optical output of the remote control are narrow, the remote control data can be received without problems by aligning the infrared emitting LED and the main body side infrared light receiving sensor 1, and the circuit current that flows at this time is also disconnected. In comparison, in the case of this example, it is suppressed to about 1/3, and the life of the battery is extended.

The current limiting circuit 4, the switch circuit 6, and the infrared emitting LED group 2 are connected in series, but the arrangement is not particularly limited. For example, the switch circuit 6, the current limiting circuit 4, and the infrared light emitting LED group 2 may be connected in this order. Although the number of LEDs of the infrared emitting LED group 2 is three for the sake of simplification of description, a large number of LEDs are generally used, and the detachment detection circuit 8 detects that the remote controller is detached from the main body. Then, the switch circuit 6 is controlled so that all the infrared emitting LEDs are turned on, and when it is detected that the remote controller is attached to the main body, the switch circuit 6 is controlled so that a small number of LEDs are turned on. Good.

According to the present embodiment, it is possible to extend the life of the battery when the main body side can receive normally regardless of the position of the remote control and the battery is used for the power supply of the remote control. The purpose of the period can be achieved. In addition, if the power supply of the remote control is supplied from the main body only when the remote control is attached to the main body, the power consumption circuit at that time is small and the remote control power supply circuit becomes simple on the main body side.

Further, the infrared ray receiving circuit of the main body side remote controller may malfunction with respect to excessive optical input (normally, if the remote controller is attached to the main body, it will be excessive optical input). Since it becomes weaker, the previous malfunction does not occur.

[0013]

[Effect of device]

 As described above, according to the present invention, the remote control and the electric device are transmitted by the small number of infrared ray emitting parts when the device is attached, and the remote control and the electric device are transmitted by the large number of infrared ray emitting parts when the device is detached. Therefore, compared to the conventional case, the power consumption can be reduced especially in the red light emitting part when it is attached, and the battery life is extended.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a remote control light output directivity characteristic varying device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of an electric circuit in the remote control light output directivity characteristic varying device of FIG.

[Explanation of symbols]

 1 ... Infrared receiver 2 ... Infrared LED group 3 ... Switch 3-1 ... Protrusion 4 ... Current limiting circuit 5 ... Battery 6 ... Switch circuit 7 ... Remote control circuit 8 ... Detaching detection time 10 ... Main body opening 20 ... Remote control opening

Claims (2)

[Scope of utility model registration request] 1. An electric device including at least a radio and a television is provided with a small number of infrared ray receiving parts (1), and a remote controller detachable by an operating part of the electric device transmits to the small number of infrared ray receiving parts (1). And a plurality of infrared ray emitting sections (2) for directing only the small number of infrared ray receiving sections (1) when the remote control is attached. And a large number of infrared ray emitting sections (D1, D3) whose transmission is permitted only when the remote control is detached and which has a wide directivity with respect to the small number of infrared ray receiving sections (1). Directional variable device. 2. The plurality of infrared ray emitting parts (D1, D3)
2. A switch (3) for permitting the transmission of the remote control when the remote controller is detached, and prohibiting the remote control when the remote controller is mounted.
The remote control optical output directional characteristic variable device described in.