JPS59833Y2 - remote control device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a remote control device that uses optical signals, such as infrared rays, to be used for channel switching on television receivers, and is particularly concerned with reflected light, external light from above such as electric lights, and external light from below. This prevents malfunctions due to external light.

Generally, as shown in FIG. 1, there has been proposed a television receiver 1 in which channel switching is performed by a remote control device using light such as infrared light.

As shown in FIG. 1, this remote control device transmits infrared rays from an infrared command device 2 operated by a viewer to a television receiver 1.
The receiving channel is sequentially switched by irradiating the infrared rays to the infrared light receiving section 3 of the infrared rays.

In this case, if the channel display section 4 is provided near the infrared light receiving section 3, it is extremely convenient because the infrared command device 2 can be operated while looking at the channel display section 4 when switching channels.

Therefore, as shown in FIG.
It is conceivable to arrange the covers 5 and 5 in close proximity to each other, and to make the cover 5 for both of them commonly made of transparent or translucent synthetic resin.

In this case, if the cover 5 is simply provided on the light receiving element 3a, reflected light, external light from above such as electric lights, and external light from below will enter the light receiving element 3a, which may cause malfunction. was there.

In addition, in a remote control device using infrared rays, it is generally necessary to increase the infrared output from the infrared command device 2 or to amplify the output of the light receiving element 3a by supplying it to a high gain amplifier. This has the disadvantage of complicating the structure, such as improving circuit stability due to

In view of these points, the present invention is designed to improve the above-mentioned points.

Hereinafter, one embodiment of the remote control device of the present invention will be described with reference to FIG.

In FIG. 3, parts corresponding to those in FIG. 2 are denoted by the same rod portions, and detailed explanation thereof will be omitted.

In this example, as in FIG. 2, the light-receiving element 3a of the infrared light-receiving section 3 and the channel display section 4 constituted by, for example, a light emitting diode are disposed close to each other, and the cover 5 is made of transparent or semi-transparent composite material. Commonly manufactured using resin.

In this case, in the present invention, a hemispherical convex lens 6 with a relatively small focal length is formed integrally with the cover 5 at a portion corresponding to the light receiving section 3, and the upper and lower portions of the convex lens 6 are formed integrally with the cover 5. The respective cut shapes, that is, the upper side 6a and lower side 6b of the convex lens 6 are made into flat surfaces.

Since the convex lens 6 has a relatively small focal length, the degree of convexity is large.

The rest of the structure is the same as in FIGS. 1 and 2.

Since the present invention is configured as described above, the infrared rays from the infrared command device 2 are supplied to the light receiving element 3a through the convex lens 6, and an optical gain is obtained by this convex lens 6, and the light receiving element 3a The gain of the amplifier circuit that amplifies the output signal of can be reduced accordingly, and the stability of this circuit can be improved.

Further, according to the present invention, the shape of the convex lens 6 is such that the upper and lower parts of the convex lens 6 are cut off, that is, the upper side 6a and the lower side 6b of the convex lens 6 are respectively flat.
The light incident on the upper side 6a and lower side 6b of the light receiving element 3a
is not supplied.

Therefore, it is less affected by reflected light, external light from above the electric lamp, and external light from below, and therefore malfunctions are less likely to occur.

Furthermore, in the above example, the light receiving section 3 is arranged close to the channel display section 4, so that when performing remote control, the infrared command device 2 can be operated while viewing the channel display, which is extremely convenient.

In the above embodiment, a remote control device using infrared rays has been described, but it goes without saying that other optical signals can be used instead.

Furthermore, it goes without saying that the present invention is not limited to the above-described embodiments, and that various other configurations can be adopted without departing from the gist of the present invention.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of a remote control device, and Fig. 2 is a perspective view showing an example of a remote control device.
A route map for explaining the main parts of the figure. FIG. 3 is a route map showing the main parts of an embodiment of the remote control device of the present invention. 1 is a television receiver, 2 is a command device, 3 is a light receiving unit,
3a is a light receiving element, 4 is a channel display section, 5 is a cover,
6 is a convex lens.

Claims (1)

[Scope of utility model registration request] In a remote control device configured to remotely control a controlled device using an optical signal from a command device, the controlled device is provided with an optical signal receiving section, and the upper and lower portions of the spherical surface are cut parallel to each other. A convex lens with a relatively small focal length that has a cutout portion removed and has a light condensing effect is disposed in front of the optical signal receiving section, and the cutout portion of the convex lens blocks external light arriving from above and below. A remote control device characterized in that it prevents malfunctions when pressing a remote control button.