JPS58159076A - Display - Google Patents

Abstract

PURPOSE:To display an input signal distinctly with a small-sized device, by performing the signal switching or the channel selection and driving the display through an interface circuit to display the input signal on an LED when a TV signal or an external input signal is received. CONSTITUTION:An LED consisting of 7 segments is used as a display element 1, and driving circuits 2A and 2B are connected to display parts of the units digit and the tens digit, respectively. An interface circuit 3 is interposed between these circuits 2A and 2B, and a channel selecting circuit 4, a TV/external input changeover switch 5, and a signal switching circuit 6 are connected to the circuit 3. The circuit 6 switches the TV signal from a TV tuner and input signals from external input terminals (a), (b), and (c) and outputs one of these input signals. In this case, the input signal is displayed through driving circuits 2A and 2B.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a display value WtK, and the present invention relates to display values WtK, and the present invention relates to a display value WtK, and the present invention relates to a display value WtK that can be used to display a TV channel number on the same display device in an electronic device such as a television receiver (hereinafter referred to as a TV receiver). The display device f4c is connected so as to be able to display input signals from an external terminal.

[Technical background of the invention]

Conventionally, for example, in a TV receiver equipped with a video input terminal to which video equipment such as a video camera, video tape recorder, or video disc can be connected, the video input switching circuit and the reception status of the video input signal are A device to display the information is required. For this reason, a display device has been installed in the TV receiver to display which external input terminal signal of the TV channel display device is connected to the TV receiver.

[Problems with background technology]

For this reason, in conventional display devices, the number of display devices required is the same as the number of external input terminals in #1 of the TV channel display device, and in devices with little space such as small sets, several external input terminals are required. There is a problem in that in order to arrange the terminals and the display device therefor, it is necessary to increase the size of the set itself or to reduce the number of external input terminals.

[Purpose of the invention]

In view of the above-mentioned points, an object of the present invention is to provide a display device for an electronic device, for example, a display device for a television receiver.
It is an object of the present invention to provide a display device that can integrate a channel number display device and a display device that displays which signal from the external input terminal of ** is being received and display the information on one display device. be.

[Summary of the invention]

The display device of the present invention has a plurality of external input terminals and can be used in a television receiver aircraft that can input and receive a plurality of external signals from external devices connected to the terminal.
i: A display means such as D, a driving means for driving this T, and a display means such as T.
A selection changeover switch for selecting whether to receive a V image or an external signal tube to receive an image; a signal changeover means for outputting either a TV scratch signal or an external W signal according to a switching operation of the selection changeover switch; and a selection changeover switch. interface means for switching between a channel number from one of the four channel selection channels and an output for displaying which external signal has been input in accordance with switching of the channel number and supplying the signal to the driving means; Switching between the display of the V channel number and the display of the connection section of the external device is to be performed at 1%.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a plotter of a display device according to the present invention. This embodiment shows an example in which a FiTV receiver is provided with external input terminals @, j, and e.

In Fig. 1, two-digit display is possible using a display element IKFi with a 7-segment configuration of light emitting diodes (C and below, LED and I), and drive circuits are installed in the 10-digit display area and the l-digit display area, respectively. 2 and 2B are connected, an interface 3 is interposed between the drive circuits 2 and 28, and a channel selection circuit 4 and a TV/external input changeover switch 5 are connected to this interface 3. The signal switching circuit 6 is configured to be connected thereto. Signal switching circuit 6 video, audio signals)
It is possible to output any one of these input signals by switching between the two input signals. For both the TV signal and the external input signal, it is necessary to switch between the video signal and the audio signal (in the case of stereo, there are two channels, left and right), depending on the current selection, but the video signal.

Since the switching function is the same as that of audio No. 41, only the video signal will be explained. This signal switching path 6111
Specifically, it is composed of an electronic switch for signal switching (known IC circuit, eg TC40@1iP) as shown in Fig. 112. This IC circuit has four switches SW2, SW3, and SW4 with the same configuration. For example, when a signal of the control terminal TV&'K"H" level is applied, the switch SWI becomes conductive and outputs the signal from the tuner. When the TV @ No. TVni output m+oUTK is output, and the terminal TV8' becomes 1L" level, the switch becomes non-conductive. In the same way, in addition to the switch #4% control terminal ESI' - 41' Using the &IC (b) path, the control terminals TVS' and 1' are connected between the switches and the control terminals.

ES2' and E84' are connected to each switch TvS, Fl:81, ES2, BS3 of the TV/external input selector switch 5.
If K continues, this selector switch 5 selects one of the external input signals from the external input terminals g, h, and e among the TV scratch signals from the TV tuner, and outputs the output terminal OL? T
K is output. The output signal is supplied to a signal processing circuit (not shown) K for reproduction and display on a picture tube. TV/
As shown in FIG. 1, the external input selector switch 5 has a DC power supply Vcc, a K switch TVS, a 1°ES2. One end of ES3 is connected in parallel, and the other end is connected to resistors R*, R, &
, R4, and the control terminals 'ffs' and Es1' of the signal switching circuit 6.

Esa' and gss' K are connected to each other. Next, the interface 3 will be explained. As shown in FIG. 1, 1 external changeover switch IS1. ES2. The output of E83 is configured to input to (or game) 7, and the output of E83 is configured to input to switch E8.
1, ES2, and ES3 are turned on. A one-way tube inverter 8 for digitally displaying whether the output from the OR gate 7 is the output from the channel selection circuit 4 or the external changeover switch. And Gate 9-24. or gate 25~
32. It is constructed using diodes D**Ds. The output of or gate 1 is converted to AND gates 10 and 12.
, 14, and the AND game.
) 10.1! , 14.1g, and at the same time input the output of OR gate 7 to AND.
K is input to one input end of Dart 18.20, 22.24. In addition, and game) III, 1g
, the other input of the snow O is grounded, the output of the OR gate 7 and the AND gate 10.1! , 14 are connected to one input terminal 11Cd through a resistor r1+"s*rst*, respectively.Then, the output t invert of the OR gate 1 is grounded.
8, and the output is AND game) 9, 11.13
．． While inputting to one input end of 15, and game)
17゜111.21, 210 Among the channel display outputs of the 0 channel selection circuit 4 which is set to be input to one input terminal, the digit outputs P1 to PaFi of IO are respectively AND game) 9
, 11, 13. Input to the other input terminal of Xi and output the digits of l Q1 to Q4t; j respectively and game) 17, 1 meeting.

21. K is input to the other input terminal of 23.

Also, external changeover switch F41. Connect one end of ES2 to the other input end of 24, 1m respectively! One end of the external changeover switch E83 is connected to a diode Ds, Ds
The above AND gate u.

22 input terminals, respectively.

Furthermore, the outputs of AND gates 9 and 10 are input to the OR gate 25, the outputs of AND gates 11 and 12 are input to the OR gate 26, and the output of AND gates 13 and 14 is input to the OR gate 25. 27, and game) 15.
The output of the OR game 25, 26, 27, and 28 is input to the drive circuit 2m. Mata and game) 1
7. Input the output of 18 to the OR gate 29, and
Game) 19. Input the output of 20 to the OR gate 30,
The outputs of AND gates 21 and 22 are input to OR gate 31, and the outputs of AND gates 23 and 24 are input to OR gate 112, and these OR gates are 29, 30, 3.
1゜33 output car ~K to input the drive circuit 2BK
I'm doing it. When #'i and display element IKLED are used in the drive circuits 2A and 28, a known flLED driver circuit (for example, TCiOfu2) composed of an IC circuit is used and is configured to enable two-digit display. ing.

Next, the i-bribe operation will be explained.

In such a display device, if the TV changeover switch TvS of the TV/external input changeover switch S is turned on and the TV reception state is set, the TV changeover switch 'ff8output IIX''H
"Level, other external changeover switch FJ11. Tax G
2. Since ms is at the 1L" level, the output of OR gate 7 becomes "L", and therefore the output of invert-8 becomes "H". As a result, ANDG) 10.12
, 14.16.1g.

The outputs of 20.22.24 are @L'', and the outputs of AND gates 11, 11.13.15.1?, 19, 21.23 are channel number outputs from channel selection path 4 and drive path 2. In this way, if the TV changeover switch 'rvs is in the ON state 11#c, the channel number output from the selection 8 circuit 4 is outputted as is from the LED driver 2A,
2BK transmission, LED driver 2mu.

2B lights up LEDl in response to the output - to state IIK of 1. Output - Displays the digits of ~l-111, outputs i~fi
#ILO digit is displayed, and the KIICD lights up to indicate Wl and lHK depending on the number of digits, for example, 4 0 out to hK.

Table 1 Next, when external changeover switch 1 is turned on, the output of OR gate 7 becomes H'') and the output of inverter 8 becomes 1L''.
, the above operation is reversed, and and game 19-24
Internal selection output display gate・, 11, 18, 15.17
．． 1121.23 is off Elk! No J output, other games) 劃、10.

The outputs of 12.14, 16.1B, 20, and 22.24 are output to the drive circuits 8 and 31. At this time, and game
)1., only the output of 1114 becomes "H", and the output i to 1 of the 1O digit becomes 1111G, and the LHDI 10 section changeover switch Σ81JJ2. This is common to ES3. In addition, in the case of ζO, regarding the output of the l digit, only the output terminal of the AND dart 24 becomes 1H', and the output of the l digit 6 to A
If 0001 and LED 1's 1 switch E83 is on, the output diodes Dl and D of the U and no digits will give an output of AND game 122.24KO1, 10°11 according to the external changeover switch ESI-183. In this way, if any of the external selector switches Eel to ES3 is turned on and the external input signal is received,
@ to El-El according to each external input terminal a, Todoroki, eK
1. Transmit the corresponding output to the two LED drivers, 28. [
.

EDIK: Display.

FIG. 3 is a block diagram of a display device using a microcomputer according to Ij1 manufactured by the company.

Figure 3 is for channel selection! stomach! The microcomputer 33 is connected to the above-mentioned interface 3 of the channel selection circuit 4. This configuration includes the operation of the signal switching path 6 and adds a terminal for a TV/external input changeover switch. In such a configuration,
Outputs the selected TV channel number according to the terminal output from the TV/external input changeover switch 5 to the LID drivers 21 and 28, or outputs it to the external input terminals m and h.
, output indicating the switching state to c (display H1 to IJ K @
It can be done in a convenient manner to produce a negative output. Note that OUT is either a TV signal output or an output of an external signal input from external input terminals g, h, and c.

Although the case of having one external input terminal has been described in FIG. 1, the present invention is not limited to this and can be applied to a device having at least one or more external input terminals. . Further, in this embodiment, the case where two digits are displayed has been described, but it is also possible to expand to display one or more digits.

[From @t) 1111] The present invention is applicable to video disc players, video tape players, etc.
When receiving a signal from an external device such as a repuder by supplying it to the external input terminal of a TV receiver, the channel display device can be used to display which external device the signal is being received from. There is no need to provide a separate display f2 to represent the connection with the device. Therefore, there is plenty of space and it is suitable for miniaturization. 9. Since the display type #4LKD can be used to display the same as the channel number display, it is possible to clearly distinguish between branch schools and islands.

[Brief explanation of the drawing]

1st Wti A block diagram of a display device according to the present invention, FIG. 2 is a block diagram showing an embodiment of a signal switching circuit, t! X3
The figure is a block diagram showing another embodiment of the present invention using a micro-computer. l--display element, 2A, 2B--drive circuit, 3-
・・Interface, 4−・Tuition selection circuit, 5−・
TV/external input selection switch, 6-・Signal switching (c) path, 7.25-32-OR-O gate, 8--Inverter, 9-24...AND-gate, Dl *
DI...diode, TV8-/TV selector switch,
ESI -ES3...External changeover switch, a, h,
c...External input terminal.

Claims (1)

[Claims] (11) In a television receiver having at least one or more external input terminals and capable of inputting and receiving external signals from external devices connected to these external input terminals. , L'N7!AD, etc., a drive means for driving all of the display means, and a selection for selecting to receive either the signal received by the television receiver or the external signal. a changeover switch; a signal changeover means into which the received friend signal and the external signal are respectively input, and which outputs the nine signals selected by the changeover operation of the selection changeover switch; When the received signal is selected to be received, a rounded signal for displaying a channel number is supplied to the driving means, and when the external signal is selected, a signal for displaying the channel number in a different form is supplied to the driving means. A display device comprising an interface means for supplying a signal to a driving means. (2) The display means is composed of a display section for the 10's digit and a display section for the 1's digit, and can be selectively switched so as to receive the external signal. The display according to claim 1, wherein the switching state is displayed in the 10s digit display area, and which external device is connected is displayed in the 1s digit display area. Device.