JPS63171029A - Automatic directional antenna switching and controlling device - Google Patents

Abstract

PURPOSE:To easily select an optimum point of the reception state by controlling an antenna by switching successively or automatically according whether, the reception state of the antenna is displayed on a screen or not with respect to a remote control television to which an indoor antenna is attached. CONSTITUTION:When a channel is selected by channel remote control, a microcomputer 14 outputs a defeat pulse 15 to a control circuit 16 and fixes a control line 23 to the high level on the automatic selection side. Then, the control circuit 16 operates a gate pulse generating circuit 4, a noise amplifying and detecting circuit 3, a coincidence pulse generating circuit 5, a frequency demultiplier 18, and a counter decoder 10 to automatically search an optimum reception state. When the same channel is selected next, the selection state of the antenna is displayed on the screen, and defeat pulse 15 directly operates the counter decoder 10 because the control line 23 is fixed to the low level on the successive switching side. Thus, the reception condition can be selected on the screen by repeat of selection of the same channel.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a television receiver connected to an automatic directional antenna switching circuit, and more particularly to a control device for the switching circuit.

BACKGROUND OF THE INVENTION Conventionally, indoor antennas are well known in which multiple antenna elements are switched using a manual rotary switch and the output of the selected antenna element is connected to the antenna terminal board of a television receiver. By the way. In addition, as shown in Figure 3, 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. Automatic antenna switching circuits that perform this function are known.

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 for gating 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 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. A counter/decoder circuit 10 is operated by the main clock 9. Counter/decoder circuit 1o decodes a control pulse for switching the configuration of antenna elements 11, 12 and outputs it to antenna switching circuit 13.

Furthermore, a defeat pulse 16 is obtained from the microcomputer 14 for channel selection of the television receiver every time a channel is selected, and the control circuit Flow generates a stable reset pulse based on the defeat pulse 16. Also, the above-mentioned coincidence pulse 6 stops the main clock 9 and starts the counter.
It operates to hold the decoder circuit 10. Furthermore, the control circuit 16 performs automatic antenna selection and sequential switching using an externally provided switch 17. In the case of progressive transmission, the defeat pulse 16 is directly switched to the clock of the counter 1o, and the configuration of the antenna elements 11, 12 is changed every time the defeat pulse 16 is input. The antenna switching circuit 13
The output of is the tuner 180 input. Further, the LED drive circuit 19 scans the four LEDs in correspondence with antenna switching to display an indication of operation. Furthermore, the mute output 20 corresponds to the rise of the defeat pulse 16 and the coincidence Hals 6.
This output is used to mute the video and audio until this occurs. Furthermore, the 7-segment LED 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 guarantee that the user will be able to select the desired optimal point. In the current configuration, in preparation for such a case, there is a changeover switch 1 for automatic selection and sequential feed.
7, but the reception condition changes greatly depending on whether you are close to the indoor antenna or away from it, so in reality,
There is a problem in that it is an extremely difficult operation to select the optimal point desired by the user in the position where the user watches television.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide an antenna switching control device that allows a user to 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 includes a channel remote control means (hereinafter referred to as channel remote control) in the television set, and when channel selection is performed, the channel number and antenna reception are performed. Equipped with an on-screen display means for displaying the status on the image display section, when a channel is selected with a channel remote control, a determination means such as a microcomputer determines whether or not the on-screen display is being performed. When this is the case, the antenna switching section is automatically switched so that the antenna switching is performed sequentially.
It is characterized in that a control signal for progressive feeding is output.

Operation By this means, the user can easily manipulate and obtain the optimum point desired by the user from a distance.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of the configuration of the present invention. Components in the figure that are the same as those in FIG. 3 are designated by the same numbers and detailed explanations will be omitted. In FIG. 1, since the signal output from the output terminal of the LEDi dynamic circuit 19 is a ternary output, the ternary-to-binary conversion circuit 2
2, it is converted into a binary value and input to the microcomputer 14. In addition, the automatic/progressive switching signal H” of the control circuit 16,
The "L" binary signal) is generated by the microcomputer 14 and is controlled by the control circuit 16 through the control line 23.

Reference numeral 24 denotes an on-screen display device, which displays on-screen the channel number and the selection status of the plurality of antenna elements 11 and 12 on the CRT screen, as shown in FIG. 2, based on the output of the microcomputer 14.

Next, the operation will be explained. When a channel is selected with the channel remote control, the microcomputer 14 controls the control circuit 1.
At the same time, the control line 23 is fixed at the high level on the automatic selection side. Then, in the above circuit, the rising edge of the defect pulse 16 is used as a trigger to operate the gate pulse generation circuit 4, the noise amplifier/detection circuit 3, the coincidence pulse generation circuit 5, and the divider 8 as explained in the conventional example. to automatically search for the best reception conditions. At this time, the microcomputer 14 also inputs the channel number and the ternary-to-binary conversion circuit 22.
The on-screen display device 24 is controlled to display an on-screen image representing the selected state of the antenna elements 11 and 12 based on the outputs of the antenna elements 11 and 12. An example of the on-screen display is shown in FIG. In FIG. 2, the position represents one selected state of the plurality of antenna elements 11.12.

Here, there are 4 combinations of antenna elements 11 and 12.
A common example is shown below. The on-screen display is normally controlled by the microcomputer 14 so that it is turned off after 2 to 3 seconds. Next time you select another channel, the same operation as described above will occur.
When the same channel is selected during the above-mentioned on-screen display, the microcomputer 14 outputs the delay pulse 16 to the control circuit 16, and also fixes the control line 23 to a low level on the forward side. The foot pulse 16 is directly switched to the clock of the counter-decoder circuit 1o, and the plurality of antenna elements 1
1.12 configurations (combinations) can be switched each time the defeat pulse 15 is input, that is, each time the same channel is selected.

Therefore, the user can obtain the optimum point while checking the reception conditions by the plurality of antenna elements 11 and 12 on-screen. Of course, each time a defeat pulse is input, the on-screen position, for example, moves to the right in the drawing.

On the other hand, if the same channel is selected after the on/off display disappears, the optimum reception condition is automatically searched in the same way as when selecting other channels.

Effects of the Invention Recent television sets have a high rate of channel remote controls, and many also have on-screen display functions. When installing an indoor antenna to a television set with such a configuration, by using the means of the present invention, the user can easily select the desired playing point with the channel remote control at the position where the user actually watches television, and operate the antenna. This greatly improves the quality of the product.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an automatic directional antenna switching control device according to an embodiment of the present invention, FIG. 2 is a front view showing an example of an on-screen display according to an embodiment of the present invention, and FIG. 3 is a switching diagram of a conventional example. It is a circuit diagram of a circuit. 11.12... Antenna element, 14...
・Microcomputer, 24... Kawa Onfu! J
-7 Display device.

Claims (1)

[Claims] The signals from the plurality of antenna elements are supplied to the antenna switching section, the output of the selected antenna element is input to the tuner of the television receiver, and the television receiver is configured to perform channel selection. On-screen display means for displaying at least the channel number and antenna selection state on the image display section, means for determining whether or not the on-screen display is being performed when a channel is selected, and the determination output is displayed on the screen. If the output indicates that the on-screen display is inside, a control signal is sent to the antenna switching unit to sequentially switch the antenna elements, and if the output is determined to indicate that no on-screen display is being performed, a control signal is sent to the antenna switching unit to automatically switch the antenna elements. an automatic directional antenna switching control device comprising means for supplying.