JPS63232714A - Switching control device for automatic directive antenna - Google Patents

Abstract

PURPOSE:To freely perform the progressive switching and the automatic switching of an antenna from a position where a television is looked and listened by providing a means, which decides whether a selected channel is the same as that being looked now or not, and whether the interval between channel selecting operations is within prescribed time or not, and whether the interval between the channel selecting operations is within the prescribed time or not. CONSTITUTION:After the channel is selected by a remote control or the like to remote- operate a television receiver set, a discrimination means 14 such as a microcomputer or the like performs the discrimination 14a whether the selected channel is the same as the channel, being looked now, or not, and the discrimination 14b whether the interval of the selecting operations is after the lapse of the prescribed time or not. The control signal of either the automatic or the progressive switching is outputted to an antenna switching circuit 13 so that if the discriminated output of the discrimination means such as the microcomputer etc., is that of the same channel and in addition, if the interval of the selecting operation is within the prescribed time, the switching of the antennal 11 is performed by the progressive switching, and in other cases, the automatic switching is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic directional antenna switching control device for a television receiver or the like.

2. Description of the Related Art Conventionally, indoor antennas are well known in which a plurality of antenna elements are switched by a manual rotary switch and the outputs of five selected antenna elements are connected to an antenna terminal plate of a television receiver.

In addition, as shown in Figure 2, the operation of obtaining the necessary signal from the television receiver, selecting the optimum point, and fixing the antenna element is performed when the receiving channel is selected and when the television set is turned on/off. Automatic antenna switching circuits are known that perform automatic antenna switching from time to time.

An outline of the operation of the conventional example will be explained with reference to FIG.

A video signal 1 and a horizontal synchronizing signal 2 are obtained from a television receiver and input to a noise amplifier/detection circuit 3 and a gate pulse generation circuit 4, respectively. The gate pulse generation circuit 4 generates a gate pulse that gates the horizontal synchronization signal period in the video signal based on the horizontal synchronization signal 2. The noise amplifier/detection circuit 3 differentiates the video signal and amplifies only the gate pulse period. Since there is no video signal during this period, noise components and ghost components contained in the received signal can be detected. Further, the gate-amplified noise component is detected, DC-converted, and a discrimination circuit composed of a DC amplifier in the matching pulse generation circuit 6 in the subsequent stage detects the point where the noise component is the least, and a matching pulse 6 is generated.

Further, a flyback pulse 7 is obtained from a television receiver, and the frequency is divided by a 1/256 frequency divider 8 to generate a main clock 9. The counter decoder circuit 10 is operated by the main clock 9. The counter decoder circuit 1o decodes a control pulse for switching the configuration of the antenna elements 11, 12 and outputs it to the antenna switching circuit j)lH3.

Further, a defeat pulse 16 is obtained from a microcomputer 14 for channel selection of the television receiver every time a channel is selected, and the control circuit 16 generates a stable reset pulse based on the defeat pulse 16. Furthermore, the above-mentioned coincidence pulse 6 operates to stop the main clock 9 and hold the counter decoder circuit 1o.

Further, the control circuit 1e performs automatic antenna selection and sequential switching using an externally provided switch 17.

In the case of forward feeding, the defeat pulse 16 is directly switched to the clock of the counter 10, and the configuration of the antenna elements 11, 12 is changed every time the defeat pulse 16 is input. The output of the antenna switching circuit 13 is input to the tuner 18.

Further, the LICD drive circuit 19 scans L]EDa in correspondence with the antenna switching, and displays that it is in operation. The mute output 20 is an output for muting the video and audio from the rise of the defeat pulse 16 until the occurrence of the coincidence pulse e. 7 segment LICD
21 is configured to display a channel number.

Problems to be Solved by the Invention However, in the above configuration, even if the above device selects the optimal point during automatic selection, if the received signal is weak and the color flickers are large, or if noise and ghosts are introduced. In the case of mixed signals (such reception conditions are common), there is no floor plan that allows the user to select the optimum point desired.

In the above configuration, in preparation for such a case, a switch 17 for automatic selection and sequential forwarding is provided. There is a problem in that it is an extremely difficult operation for the user to select the optimal point from which to watch television.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide an antenna switching control device that can easily select the optimal point for receiving conditions when using an indoor antenna.

Means for Solving the Problems The automatic directional antenna switching control device of the present invention provides a control system for automatically controlling a channel using a microcomputer or the like when a channel is selected using a channel remote control means (hereinafter referred to as a remote control) for remotely controlling a television receiver. The determination means determines whether the selected channel is the same as the channel currently being received, and determines whether a certain period of time has elapsed between channel selection operations, and the determination means such as a microcomputer outputs the determination. If the channels are the same and the interval between channel selection operations is within a certain period of time, the antennas are switched sequentially, and in other cases automatic/sequential control is applied to the antenna switching unit so that automatic switching is performed. It is characterized by outputting a signal.

By this means, the user can perform sequential antenna switching from a distance by repeatedly selecting the same channel for a short time, and automatic switching can be performed for other operations. The optimum point can be easily manipulated.

Embodiment Hereinafter, an embodiment of the present invention will be explained with reference to FIG. 1, which is an embodiment of the present invention. Components in the figure that are the same as those in FIG. 2 are designated by the same numbers and detailed explanations will be omitted.

In FIG. 1, an automatic/sequential feed switching control signal (binary numbers H", "L") for the control circuit 16 is generated by the microcomputer 14 and is passed through the control line 23 to control the control circuit 16. 141L is one function of microcontroller 14,
14b is a means for determining whether or not the selected channel is the same as the channel currently being received when a channel is selected, and 14b is a means for determining whether or not the interval between channel selection operations has elapsed for a certain period of time. 140 is a means for determining whether the above-mentioned respective determining means 14a, 14b indicate the same channel, and if the channel selection operation interval is within a certain time, the antenna element is connected to the control line 23. 11.12 is a means for generating a control signal for sequential switching.

Next, the operation will be explained. When a channel is selected for the first time with the remote control, the microcomputer 14 sends a signal to the control circuit 16 by the control signal generating means 140.
6 and outputs “H” on the control line 23 fully automatic selection side.
Fixed to level.

Then, the above circuit uses the rising edge v of the defeat pulse 15 as a full trigger, and as explained in the conventional example, the gate pulse generation circuit 4, noise amplifier/detection circuit 3, coincidence pulse generation circuit 5, and frequency divider 8 operate. to automatically search for the best reception conditions.

Next, when you select another channel using the remote control, the circuit basically performs the operation described above.
The channel determination means 14a determines whether or not the same channel as the channel currently being received has been selected, and the channel selection operation interval determination means 14b determines whether or not the channel has been selected within a certain period of time after the previous channel selection. If the same channel is selected and the interval between the channel selection operations is within a certain period of time (several seconds), the microcomputer 14 controls the control circuit 16.
While outputting the head feed pulse 16, this time,
By fixing the control line 23 to the "L" level on the progressive side by the control signal generating means 140, the defeat pulse 15 is directly transmitted to the counter/decoder circuit 1 in terms of hardware.
o clock and the plurality of antenna elements 11.1
Configuration 2 (combined set) can be switched every time a total defeat pulse is received, 9 each time the same channel is selected within a certain period of time 6 Therefore, the user can leave the reception state by multiple antenna elements From there, you can find the optimal point while checking the actual image.

On the other hand, if the interval between channel selection operations is a certain period of time (several seconds), even if the same channel is selected, it will be the same as when selecting another channel = H on the control line 23 fully automatic selection side.
”Fix the level and automatically search all the optimal reception conditions.

Effects of the Invention As described above, according to the present invention, the user can freely perform forward switching and automatic switching of antennas at the position where the user actually watches television, and can easily select the optimal point. This can greatly improve operability.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram of an automatic directional antenna switching control device according to an embodiment of the present invention, and FIG. 2 is a circuit block diagram of a conventional automatic directional antenna switching device. 11.12... Antenna element, 14...
Microcomputer, 148...Channel discrimination means, 14b...Tuning operation interval discrimination means, 140...Control signal generation means.

Claims (1)

[Claims] Each output terminal of the plurality of antenna elements provided is connected to an antenna switching section, and the reception signal from the antenna element selected by the antenna switching section is input to the tuner, and channel selection is performed. means for determining whether or not the selected channel is the same as the previously received channel; and means for determining whether the interval between channel selection operations is within a certain period of time; and if the interval between channel selection operations is within a certain period of time, a control signal for sequentially switching the plurality of antenna elements is supplied to the antenna switching section, and the discrimination outputs of both discrimination means are not the same channel. and means for supplying a control signal for automatically switching the plurality of antenna elements to the antenna switching unit if the interval between channel selection operations is longer than a certain time.