JPH01132234A - Remote controller position detector - Google Patents

Abstract

PURPOSE:To construct a small-sized remote control system by making a photodetector and a preamplifier among a remote controller position detecting signal light-receiving means and a normal signal light-receiving means into a pair, amplifying sufficiently the minute output current of the photodetectors and after that, adding and switching the outputs of the photodetectors. CONSTITUTION:A remote controller 1 generates signals respectively in separate timings by a remote controller position detecting signal generating means and a normal signal generating means and sends the signals through an infrared signal generating means. The photodetectors 21, 22 and 23 of a light-receiving part 2 are fixed by changing respectively their fitting directions and of narrow directivity by a reflector 24. When normal signals are sent from the remote controller 1, by a normal signal action signal, the signal from the photodetectors 21, 22 and 23 are amplified by preamplifier 25, 26 and 27, added by a switching circuit 28 and connected to a post-amplifying circuit 29 for the normal signal. When remote controller position detecting signals are sent, the signals from the preamplifiers 25, 26 and 27 are successively switched by a switching circuit 28, connected to a post-circuit for 30 for detecting the position of the remote controller and outputted as a remote controller position signal.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a position detection device for a wireless remote control using infrared light as a medium.

Conventional technology As a position detection device for a remote control, for example, a position detection signal outputted from the remote control via an infrared light emitting diode with a wide directional output is detected by a plurality of light receiving elements having narrow directional characteristics arranged in different directions. There is a device that detects the position and direction of the remote control by comparing the intensity of each received light output.

Problems to be Solved by the Invention However, in the above-mentioned prior art, the position detection function of the remote control is only considered as an independent function, and various instruction functions from the remote control, that is, ordinary signals consisting of multiple commands in digital codes, are not considered. The light receiving means was considered completely separately.

The present invention has focused on the above-mentioned problem, and provides a remote control position detecting device that is constituted by a small number of light receiving means, and that these light receiving means have both the functions of remote control position detection and normal signal reception, and operate effectively. be.

Means for Solving the Problems In order to solve the above problems, the remote control position detection device of the present invention includes a remote control position detection signal generating means, a normal signal generating means in which a plurality of commands are configured as digital codes, and a remote control position A remote control having an infrared signal generating means for outputting signals from the detection signal generating means and the normal signal generating means as infrared light, and a remote control position detection signal receiving means and normal signal receiving means for respectively receiving the infrared signals emitted from the remote controller. The remote control position detection signal light receiving means and the normal signal light receiving means are configured to include a plurality of pairs of light receiving elements, a preamplifier, a switching circuit, and an amplification/tuning/detection/waveform shaping circuit. .

Effect of the Invention According to the above configuration, the light receiving element and the preamplifier of the remote control position detection signal light receiving means and the normal signal light receiving means are paired, so that addition and switching of inputs of each light receiving element can be easily performed. By combining it with amplification, tuning, detection, and waveform shaping circuits, it is possible to construct a small remote control system with a compact volume.

Embodiment Hereinafter, a remote control position detection device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a remote control position detection device in an embodiment of the present invention. In the figure, 1 is a remote control, and 2 is a light receiving section provided with remote control position detection means and normal signal detection means.

A signal from the remote control 1 to the light receiving section 2 is sent in the form of infrared light.

Further, the remote control position detection function is detected based on the angle of incidence of infrared light on the light receiving section 2.

FIG. 2 is an internal block diagram of the remote control 1.

The remote control 1 has a built-in remote control position detection signal generation means, a normal signal generation means, and an infrared signal generation means, and the remote control position detection signal generation means and the normal signal generation means each generate signals at different timings. A signal is sent out via the signal generating means.

FIG. 3, FIG. 4, and FIG. 6 are explanatory diagrams showing the directivity of the reception sensitivity of the light receiving section. 21°22.23 in Figure 3
24 is a light receiving element for remote control position detection, and 21 is a light receiving element 21.
, 22 and 23 to narrow the directivity. The light-receiving elements 21, 22, and 23 are fixed in different mounting directions, and have narrow directivity due to the reflector 24. ', 23'. Therefore, the directionality of infrared light from the remote controller can be determined based on the output current level of the light receiving elements 21, 22, and 23.

Also, by adding the respective outputs of the light receiving elements 21, 22, and 23, the receiving sensitivity is 21'+22' in Fig. 5.
It has wide directivity like +23' and can receive normal signals from any direction.

Next, the internal circuit configuration of the light receiving section 2 will be explained with reference to FIGS. 6 and 7. In the same figure, 25.26° 27 is a preamplifier for the light receiving elements 21, 22, and 23, respectively.
8 is a switching circuit for remote control position detection signals and normal signals; 29 is a post-stage amplification circuit comprising amplification, tuning, detection, and waveform shaping for normal signals; 30 is an amplification circuit for remote control position detection;
This is a post-amplification circuit consisting of tuning and detection. When a normal signal is being sent from the remote control 1, the signals from the light receiving elements 21, 22, and 23 are amplified by the preamplifiers 25, 26, and 27, respectively, to a sufficiently controllable amplitude according to the normal signal operation signal. The signals are added by the switching circuit 28, connected to the normal signal rear-stage amplification circuit 29, and outputted as a normal signal. Also, when the remote control position detection signal is being sent from the remote control 1, the signals from the preamplifiers 25, 26, and 27 are transmitted as shown in FIG. 7A.

The signal is sequentially switched by the switching circuit 28 at timings B and C, connected to the remote control position detection downstream circuit 30, and outputted as a remote control position signal.

According to the embodiments described above, the post-stage amplifier circuit for normal signals is configured separately, but in other embodiments, it is also possible to use a common circuit for each circuit.

Effects of the Invention As described above, the present invention makes it possible to make the minute output current of the light receiving element sufficiently controllable by pairing the light receiving element and the preamplifier of the remote control position detection signal light receiving means and the normal signal light receiving means. By adding and switching the inputs of each light receiving element, it is possible to construct a remote control position detection system with stable operation and high reliability.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the positional relationship between the remote control and the light receiving section of the remote control position detection device in the embodiment of the present invention, Fig. 2 is an internal block diagram of the remote control, and Figs. 3, 4, and 6 are the light receiving section. FIG. 6 is a circuit diagram showing the internal circuit configuration of the light receiving section, and FIG. 7 is a timing chart of signals of each part in FIG. 6. 1...Remote control, 2...Light receiving section, 21
, 22゜23... Light receiving element for remote control position detection, 24... Reflector, 21', 22', 23
'... Light receiving element ← 21. Optical directivity characteristics of 22, 23, 25, 26° 27... Preamplifier, 2
8...Switching circuit for remote control position detection signal and normal signal, 29...Late stage amplifier circuit for normal signal, 3o...Late stage circuit for remote control position detection. Name of agent: Patent attorney Toshio Nakao and 1 other person2-
Original part Figure 2 Figure 3111 Figure 4 Figure 5 Sp

Claims (1)

[Claims] It has a remote control position detection signal generation means, a normal signal generation means comprising a plurality of commands as digital codes, and an infrared signal generation means for outputting the signals from the remote control position detection signal generation means and the normal signal generation means as infrared light. It has a remote control, a remote control position detection signal light receiving means and a normal signal light receiving means, each of which receives an infrared signal transmitted from the remote control, and the remote control position detection signal light receiving means and the normal signal light receiving means are configured to receive light in plural pairs. A remote control position detection device consisting of an element, a preamplifier, a switching circuit, and an amplification/tuning/detection/waveform rectification circuit.