JPH021957Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a channel selection display device of a tuner of a television receiver used in a CATV system in a hotel or the like.

[Conventional technology and technical issues to be solved]

Previously, some TV receivers used in CATV terminals in hotels etc. could only receive broadcasts and general commercial broadcasts, but in recent years hotels etc. Increasingly, multiple independent broadcasting channels are being set up to broadcast hotel information and special movies for a fee. However, in such a situation, the channel selection display device of conventional TV receivers could only display the operated channel selection switch, so it was difficult to select the channel in a dark room. It was difficult to operate the station switch accurately, and if the channel selection switch of a pay broadcasting channel was activated by mistake, troubles related to charges would occur, which was very inconvenient.

This invention was made to solve the inconvenience of conventional channel selection display devices, and it displays not only the channel being broadcast in a dark room with the lights off, but also other non-selected channels (including independent broadcasting channels in the facility). ) is clearly illuminated so that it can be visually recognized, and the luminous illuminance is distinguished between broadcasting channels and non-broadcasting channels that are on standby, making it easy to recognize the broadcasting channel you are currently watching and change the channel. The technical problem is to provide a type of channel selection display device.

[Means adopted to solve the problem]

The means adopted by the present inventor to solve the above-mentioned technical problem will be explained below with reference to the accompanying drawings.

That is, the present invention provides a channel selection switch row 1 consisting of channel selection switches 11, 11, etc. arranged in such a manner that a desired broadcasting channel can be specified and selected, and a channel selection switch row 1, which is arranged in such a manner that a desired broadcasting channel can be specified and selected, and a channel selection switch row 1, which corresponds to each of said switches 11, 11,... A channel selection switch with a light emitting display includes a signal line 2 consisting of light emitting indicators 21, 21, . (a) a tuning switch 11 constituting the tuning means;
11, and when any of the tuning switches is turned on, interface means inputs the output of the turned on tuning switch as tuning data; (b) interface means to this interface means; Command storage means that stores command content data corresponding to changes in input data; (c) Tuning data storage means that records tuning data input to the interface means and can be read out immediately; (d) This Information processing means that compares the current channel selection data recorded in the channel selection data storage means with various command data stored in the command storage means and outputs required command data corresponding to the current channel selection data. (e) Data holding means for holding the command signal output by the information processing means; A switch self-holding circuit 31 consisting of a switch self-holding circuit 31 and a luminous control circuit 32 are provided, and the switch self-holding circuit 31 and the luminance control circuit 32 are provided to turn the channel selection switches 11, 11, etc. ON and OFF. By the interlocking switch self-holding circuit 31 and luminance control circuit 32, in the tuning standby state, the light emitting display 2
By limiting the amount of power supplied to the display devices 1, 21..., the illuminance of all of the display devices 21, 21... is reduced so that they emit light with the same contrast. When the channel selection switch 11 is operated and a specific broadcast channel is selected, one of the light emitting indicators 21, 21, . The restriction on the amount of power supplied only to the corresponding light-emitting display 21 is removed, and only this light-emitting display 21 is connected to other light-emitting displays 21 and 2.
By employing a means of discriminating and emitting light with a contrast different from 1..., we have realized a luminescent visual recognition type channel selection channel display device that can satisfy the above-mentioned technical problems.

〔Example〕

Hereinafter, the present invention will be explained in more detail based on embodiments shown in the accompanying drawings.

The switch row 1 shown in the drawing is arranged in a predetermined order on the front surface of a cabinet (not shown). Channel selection switch 1 configuring this switch row 1
As 1, 11, . . . , conventionally well-known push button switches are used in the present embodiment. In the vicinity of these tuning switches 11, 11, there are light-emitting displays 21, 2 to indicate the tuning of each tuning switch.
1... are arranged in a contrasting manner, resulting in a hierarchical signal sequence 2
is formed. Light emitting indicator 2 adopted here
Although light emitting diodes are normally used for 1, 21, etc., it is of course possible to replace them with well-known pilot lamps.

In this embodiment, the circuit that individually controls the illuminance of the signal train 2 is composed of a switch self-holding circuit 31 and a luminance control circuit 32, and the signal drive circuit 10.
It consists of In the illustrated example of FIG. 2, the switch self-holding circuit 31 is a read-only memory.
ROM, readable/writable memory RAM, central processing circuit that processes data in these memories
A one-chip microcomputer (manufactured by Mitsubishi Electric Corporation: "M
58840-XXXP") is used, and the read-only memory ROM is programmed with an instruction to output the changed data to the data holding circuit O when the input data of the parallel input control changes.

The parallel input circuit of the switch self-holding circuit 31 connects the channel selection switches 11 and
11..., and when any of the tuning switches 11 is turned on, it is input to the parallel input circuit and stored in the memory RAM as current tuning data. Then, the processing circuit CPU compares and processes the current channel selection data stored in the memory RAM with various command content data stored in the read-only memory ROM, and calculates the required data corresponding to the current channel selection data. The command data is output to the data holding circuit and held until the next new command data is output.

The luminance control circuit 32 is provided corresponding to the all-emission display devices 21, 21, . . . of the signal line 2.
It is composed of OR gates 32a, 32a..., a monostable multivibrator 32b, an astable multivibrator 32c, and a counter 32d. One of the two input parts of each of the OR gates 32a, 32a... is connected to the data holding circuit O, and the other input part is connected to the monostable multivibrator 32b. The light emitting indicators 21, 21, . . . simultaneously emit light based on the output of the multivibrator 32b. On the other hand, the monostable multivibrator 32b
is linked to the astable altivibrator 32c via a counter 32d. The pulses oscillated by the monostable multivibrator 32c are frequency-divided by a counter 32d and triggered at regular intervals to output pulses with a constant cycle like a monostable multi-output, as shown in FIG.

Therefore, when the entire circuit is in the energized state in FIG. 2, that is, when it is in the tuning standby state, a single trigger pulse is generated for each trigger pulse obtained by dividing the pulse of the astable multivibrator 32c by the counter 32d. Stable multivibrator 32a
will give output pulses to the OR gates 32a, 32a..., and the light emitting indicator 2 of the signal line 2
1, 21, etc. are made to flicker in a certain period of time. The flickering of the light emitting indicators 21, 21, etc. is caused by an afterimage phenomenon to the naked eye, and if the flickering is caused to disappear, for example, 30 times or more per second, the illuminance will be averaged to a low level and the light emitting state will change. It looks somewhat dark.

Therefore, the channel selection switch 1 in the device of this embodiment
1, 11... and the light emitting indicators 21, 21... will be explained based on the flow sheet shown in FIG. 5, with reference to the time chart shown in FIG. 3 as appropriate.

First, the CPU of the switch self-holding circuit 31 in the device of this embodiment is interfaced with the parallel input circuit and reads out the current state of the tuning data stored in the memory RAM. If none of the channel selection switches are pressed (NO), the light emitting indicators 21, 21...all are sent to the data holding circuit O based on the command contents recorded in the memory ROM. A low illuminance light emission command is issued to make the light blink in a minute time range.

Next, when any of the tuning switches 11 is pressed (YES), the CPU of the switch self-holding circuit 31 inputs the tuning data interfaced to the parallel input circuit and the memory.
Compare the channel selection data recorded in the RAM, and if there is no change from the previous channel selection data (YES), the CPU outputs the corresponding data to the channel selection switch 11 that was turned ON. As shown in the left part of FIG. 3, the line A _PL of the light emitting display 21 corresponding to the channel selection switch 11 turned ON is output to the holding circuit.
Only the light-emitting display 11 associated with the _{APL enters a continuous power supply state and the amount of power supplied increases, and the illuminance of only the light-emitting display 11 associated with the APL} increases and shines brightly, but the lines corresponding to the other light-emitting displays 21, 21... B _PL , C _PL , D _PL ... are still blinking and the power supply is limited, so
If the low-light emission state continues, the line A _PL
A brightness contrast appears between the light emitting display 21 of A and the light emitting display 21 connected to the light emitting display 21 of A.

If it differs from the previous tuning data (NO), the CPU releases the previous tuning data (previously held) recorded in the memory RAM, and then stores the newly pressed data in the memory RAM. The corresponding tuning data is written and held in the tuning switch 11, and the CPU outputs the corresponding data to the turned ON tuning switch 11 and outputs it to the data holding circuit.
As shown in the right part of Figure 3, instead of A
Only the line B _PL of the light-emitting display 21 corresponding to the turned-on B channel selection switch 11 enters a continuous power supply state, and the amount of power supplied increases, and the illuminance of only the light-emitting display 11 associated with the B _PL increases and shines brightly. Therefore, other light emitting indicators 21,
Lines A _PL and C _PL /D _PL corresponding to 21…
emits low-intensity light by flickering energization.

Although the device of this embodiment is generally constructed as described above, the present invention is by no means limited to the above-mentioned embodiment, and various modifications can be made within the scope of the "claims for registration of a utility model." For example, as for a mechanism for selectively discriminating only specific light emitting indicators 21, 21, . Of course, I also plan to do so. That is, the luminance control circuit 32 shown in FIG. A resistor R1 connected to one corresponding light emitting display 21; and a second resistor _R1 connected to the collector side of the same transistor Tr, and the other connected to the line of the resistor _R1 and the display 21. ₂ ; when any one of the channel selection switches 11 in the switch row 1 is operated to select a specific broadcast channel, the luminance control circuit 3 is transmitted from the switch self-holding circuit 32 to the luminance control circuit 3;
Additional power is supplied to the base side of the transistor Tr in 1 to increase the illuminance of the light emitting display 21, which can be replaced with the luminance control circuit shown in FIG.

[Effects of this invention]

As explained above, in this invention, the light-emitting display corresponding to the non-tuning switch also emits light in the tuning standby state, so even when installed in a dark room, the position of each tuning switch can be remembered. It is easy to know, eliminates inconveniences such as incorrect channel selection, and has many practical advantages.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an outline of the present invention, Fig. 2 is a mechanical wiring diagram showing an embodiment of the display device of the invention, and Fig. 3 is a time chart of a light emitting display corresponding to Fig. 2. , FIG. 4 is a circuit diagram showing another embodiment of the contrast generating mechanism in the light emitting display of the present invention, and FIG. 5 is a flow sheet showing the flow of the interlocking relationship between the channel selection switch and the light emitting display. . 1...Switch row, 2...Signal row, 3...
Switch drive circuit, 11... Tuning switch, 21
...Light-emitting indicator, 31...Switch self-holding circuit, 32...Luminous control circuit.

Claims (1)

[Claims for Utility Model Registration] Channel selection switches 11, 11 arranged in such a way that a desired broadcasting channel can be specified and selected.
A channel selection switch row 1 consisting of... and each of the switches 11, 11... are arranged correspondingly, and each channel selection switch 1 is
In a channel selection switch with a light emitting display, which includes a signal line 2 consisting of light emitting indicators 21, 21, etc., which visually confirm the ranking of broadcast channels in contrast to the channel selection means, (a) the channel selection switch 1 constituting the channel selection means;
1, 11..., and when one of the tuning switches is turned on, the interface means inputs the output of the turned on tuning switch as tuning data; (b) This interface Command storage means for storing command content data corresponding to changes in input data to the means; (c) Selection data storage means for recording channel selection data input to the interface means and capable of immediate readout; (d ) Information processing that compares the current channel selection data recorded in this selection data storage means with various command data stored in the command storage means and outputs required command data corresponding to the current channel selection data. means; (e) data holding means for holding the command signal outputted by the information processing means; and an output side corresponding to each of the light emitting indicators 21, 21, . . . of the signal train. and one of each input section is connected to the data holding means.
Gates 32a, 32a..., monostable multivibrator 32b, astable multivibrator 32 connected to the other input of these OR gates.
c, and a counter 32d, or an all-light-emitting display 2 constituting the signal line 2
Transistors Tr corresponding to 1, 21..., respectively;
Connected to the emitter side of these transistors Tr,
And the other one is a corresponding one light emitting display 21
Resistor R ₁ connected to; Connected to the collector side of the same transistor Tr,
The other one includes the resistor R ₁ and a second resistor R ₂ connected to the line of the display 21;
1 is operated and a specific broadcast channel is selected, additional power is supplied from the switch self-holding circuit 32 to the base side of the transistor Tr in the luminance control circuit 31, and the illuminance of the light emitting display 21 increases. A luminance control circuit 32 is provided which is configured to perform the following functions, and the luminance control circuit 32 and the switch self-holding circuit 31 which are linked to ON/OFF of the channel selection switches 11, 11... In the tuning standby state, the light emitting display 2
By limiting the amount of power supplied to the display devices 1, 21..., the illuminance of all of the display devices 21, 21... is lowered and the display devices 21, 21... are allowed to emit light with the same contrast. When the channel selection switch 11 is operated and a specific broadcasting channel is selected, one of the light-emitting indicators 21, 21, etc., which are on standby and emit light in low illumination, is selected by the operated channel selection switch 11. The power supply limit for only the corresponding light emitting display 21 is canceled and only this light emitting display 21 is connected to other light emitting displays 21, 21.
A luminescent visual recognition type channel selection channel display device characterized by discriminating and emitting light with a different contrast. The interface means of the switch self-holding circuit 31 is a parallel input circuit connected to each of the channel selection switches 11, 11, . It is a read-only memory ROM that stores command content data corresponding to changes, and the channel selection data storage means of the switch self-holding circuit 31 is an instant read/write memory that stores the channel selection data input to the parallel input circuit. The information processing means of the switch self-holding circuit 31 compares the current channel selection data stored in the memory RAM with various command content data stored in the read-only memory ROM. The data holding means of the switch self-holding circuit 31 outputs the required command data corresponding to the current channel selection data, and the data holding means of the switch self-holding circuit 31 outputs the command data outputted by the central processing circuit CPU as a new command. A data holding circuit that holds data until it is output, and these parallel input circuits and read-only memory.
ROM, readable/writable memory RAM,
A light-emitting visible channel selection channel display device according to claim 1, wherein a microcomputer that integrally includes a central processing circuit CPU and a data holding circuit is used as the switch self-holding circuit 31.