JPS58210768A - Display of television receiver - Google Patents

Abstract

PURPOSE:To make display extremely easy to grasp by superimposing a characters for showing a reception channel and a character for showing a reception broadcasting mode on a picture on a picture display element as pictures. CONSTITUTION:A display switching circuit 25 selects a character to be displayed in a display period on the basis of outputs F and H of timers 26 and 27 and an output I from a recall switch 34. Namely, whether the channel character is displayed on the screen of a cathode-ray tube 10 all the time or only for a specific time is determined. When a channel switched by the output F of the timer 37 for a specific time is in stereophonic broadcast reception mode during channel switching, a stereophonic display switching circuit 38 is put in operation through an AND gate 35 and when in bilingual broadcast reception mode, a bilingual broadcast display switching circuit 39 is put in operation through an AND gate 36. At the same time, a display switching circuit 33 is put in operation. The readout timing of a readout timing pulse generating circuit 33 for a character generator 23 and the kind of a character to be read are changed to control the character generator 23. The display signal P of a character generated by this character generator 23 is applied to the video output circuit 7 of a television receiver 1 through a color switching circuit 30 to display the character on the screen of the cathode ray tube 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for displaying channels on a television receiver and displaying a broadcast mode before sound multiplex broadcasting.

The conventional display device uses a single light emitting diode, etc. as a display means, and has the disadvantage of being small and difficult to see.Also, it is difficult to notice even if the broadcast mode of the audio multiplex broadcast changes during the broadcast. There was an inconvenience that there were many cases where it was not available.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an apparatus that can eliminate such drawbacks of the conventional technology and provide an easy-to-see and understandable display.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in the drawings for illustrative purposes. 1st
The figure shows the combination, and in the figure, 1 is a normal television receiver. 2 is the cheese, 3 is a channel selection circuit using a logic circuit, 4 is a VIF circuit, 5 is a video detection circuit, 6
1 is a video amplification circuit, 7 is a video output circuit, 8 is a synchronization separation circuit, 9 is a horizontal/vertical deflection circuit, and 10 is a CRT as an image display element for displaying a received image. 'i, 11 is S
IF circuit, 12 is an audio detection circuit, 13 is a filter that separates the main channel signal, sub-channel signal and pilot signal of the sound multiplexed signal, 14 is a stereo mode discrimination circuit 11, and 15 is a dual mode discrimination circuit. , 16 is an audio multiplex signal processing circuit that performs 4-tone sub-channel signals and matrix synthesis and switching; 17 and 18 are audio amplification circuits;
19.20 is a snooping output circuit, and 21.22 is a speaker. Since these are normal circuits, a detailed explanation thereof will be omitted.

Reference numeral 23 is a display signal (video signal number) for displaying the channel letter (for example, "6") of the receiving channel and the broadcast mode of the receiving channel at that time (for example, rsJ during double broadcasting) in this device. ), and the character generator 24 is a timing signal generation circuit that generates the display signal and is controlled in synchronization with the scanning of the CRTlo.

Furthermore, 25 is a display switching circuit that switches the characters to be displayed according to the reception channel and reception broadcast mode. Furthermore, 26 and 27 are timers that control the display times, and 28 is a timer that controls timer Z when the power is turned on.
The power-on production circuit 29 is a mode change detection circuit that controls the timer 27 when the broadcast mode of the receiver 11j changes. 3
0 is the character to be displayed.

This is a lustrous one-shot circuit that switches the color of mode letters according to the mode.

2 to 4 show how channel characters 31 and mode characters 32 are displayed on the CRTlo screen.

The operation will be explained below.

The channel selection circuit 3 outputs a channel switching signal A when switching channels, and the timer 27 outputs the channel switching signal A when switching channels.
trigger. Further, the channel selection circuit 3 outputs a channel selection information signal B indicating the currently selected channel, and information indicating which channel is being selected is added to the channel display switching circuit 33.

Further, the discrimination output C1 of the audio multiplexing stereo broadcast discrimination circuit 14 of the television receiver 1, the discrimination output C1 of the square broadcast publication 16, is added to the mode change detection circuit 29, and a broadcast mode different from the previous broadcast mode is inputted to the mode change detection circuit 29. When the change occurs, this is detected, and the timer 27 is also triggered by the detection output E. If neither the stereo broadcast discrimination output C nor the double broadcast discrimination output is output, the broadcast is monaural. This timer 27 outputs a timer output Ff: for about 3 seconds from the moment the trigger is triggered.

On the other hand, the power-on detection circuit 28 detects when the power of the television receiver 1 is turned on and triggers the timer 26 based on the detection output G. 26 is approximately 1 from trigger one
Outputs timer output H for 0 seconds.

In the display switching circuit 26, the outputs F of the timers 26 and 27,
H and the output I from the recall switch 34 select the character 'f1' to be handwritten during the period to be displayed. If the recall switch 34 is open, the channel letter 3
1 is always displayed, and if it is closed, the channel character 3 is displayed.
1 to be displayed depending on the timers 26 and 27. That is, this is a switch for selecting whether to display the channel letters 31 on the screen of the cathode rays 84-10 all the time or only during a predetermined period of time.

35.36 is an AND gate 37 which is an OR gate and the output F of the timer 27 is added as a common input.
A stereo broadcast discrimination output C is coupled to the other input of the AND gate 36, and a double broadcast discrimination output C is supplied to the other input of the AND gate 36.

Further, other inputs of the OR gate 37 are supplied with the output H of the timer 26 and the output IOL of the recall switch 34.

, This allows the timer 37 to be activated when switching channels.
If the channel switched for a certain period of time by the output F of is selected in the stereo broadcast reception mode, the stereo display switching circuit 38 is operated via the AND gate 36, and when it is selected in the two-car broadcast reception mode, the channel is operated via the AND gate 36. The dual broadcast display switching circuit 39 does not move. At the same time, regardless of the broadcast mode of the receiving channel, the display switching circuit 33 is activated for the channel via the orgelt 37. The outputs M, N, and O of the respective switching circuits 38, 39, and 33 change the successive timing of the successive timing pulse generation circuit 24 for the character generator 23 and the type of character to be played by Masuda, thereby changing the character generator 23. control (4. Then, generated from the character generator 23, n'17
The display signal P for the character c is applied to the video output circuit 7 of the television receiver 1 via the color switching circuit 30, and is displayed on the screen of the cathode ray tube 1o.

FIG. 2 shows an example of a display when receiving a double broadcast, FIG. 3 shows an example of a display when receiving a stereo broadcast, and FIG. 4 shows an example of a display when receiving a monaural broadcast.

The timer 27 only outputs the output F for about 3 seconds, and then it disappears, so the character "S" or m displayed on the stereo broadcast.
JLC Broadcast Table)"<The character "2" disappears. When the recall switch 34 is closed, the channel display characters 31 disappear after a certain period of time together with the above-mentioned double broadcast display characters or stereo broadcast display characters. If the recall switch 34 is open, the output of the OR gate 34 is always at a high level and drives the channel display switching circuit 33, so the channel display characters 31 continue to be displayed. I will know.

Father, when the power is turned on, the output of the timer 26 of about 10 seconds triggered by the power-on detection circuit 28 is input to the OR gate 37, so the recall switch 34 is activated.
Even if it is in the open state, it takes about 3 to 6 hours until the cathode of the ray tube 10 is sufficiently heated and an image is projected.
seconds, and the channel display character 3 along with the image 1
1 will also begin to be projected, so channel letters 31 will be displayed for the remaining 5 seconds and then disappear.

Further, in the color switching circuit 30''C, the stereo broadcast discrimination output C' is inputted to the AND gate 40 and the NOR gate 411τ, and the output from the TOKYO sender is inputted to the R node gate 42 and the NOR gate 41; The output is input to AND gate 43.On the other hand, AND gates 40 and 42
．． The output P of the Charafter generator 23 is commonly supplied to the other input of the generator 43. Here, the output Q of the AND gate 42 is sent to the red circuit of the video output circuit 7, the output R of the AND gate 4° is sent to the line circuit of the video output circuit 7, and the output S of the AND gate 43 is sent to the blue circuit of the video output circuit 7. Since it is connected to the output stage, the display character 3 is displayed when receiving double broadcasting.
The color of 1.32 is red, the color of the displayed characters 31.32 is green when receiving a stereo broadcast, and the color of the displayed characters 31.32 is blue when receiving a monaural broadcast. When the recall switch 34 is open, the stereo and two-car display characters 32 will disappear in about 3 seconds and only the channel display history 31 will continue, so by looking at the channel display characters 310 colors, you can enter the broadcast mode. can be immediately determined.

Furthermore, since the timer 27 is triggered by the broadcast mode change detection output E, the received broadcast can be received even when the recall switch 34 is closed.

When there is a change in the mode, the broadcast mode display characters 32 and channel display characters 31 are displayed on the cathode ray tube 10 in the color of that mode, as described above.

As described above, according to the present invention, characters indicating the channel being received and characters indicating the broadcasting mode being received are displayed as images on the image display element. This makes it possible to make the display extremely easy to understand and to make the television receiver easy to understand.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a display device of a television receiver according to an embodiment of the present invention, and FIGS. 2, 3, and 4 are perspective views showing the display state thereof. 1... Television receiver, 2... Tuner, 3... Tuning circuit, 7... Video output circuit, 10... CRT, 13... ... Filter, 14 ... Stereo mode discrimination circuit,
16...Double mode discrimination circuit, 16...
Audio multiplex processing circuit, 23... Character generator, 24... Timing pulse generation circuit, 26
...Display switching circuit, 26.27...°timer, 28゛・°゛°゛Power-on detection 1q path, 29...
...Mode change detection circuit, 30...Color switching circuit, 31-...Character of channel display, 32...
...Mode display characters, 33...Channel display switching circuit, 34...Recall switch,
35.36...and gate, 37...
・OR gate, 38...Stereo display switching circuit, 39...Double display switching circuit, 40°42.4
3...And Gate, 41m...Noah Gate. Agent name: Patent attorney Toshio Donakao and one other person Figure 1 354 No. 2 1q

Claims (1)

[Scope of Claims] An image receiving circuit that receives a television signal and generates a video signal for displaying a single image and an audio signal for audio reproduction, an image display element that displays the received image, and a channel that receives color. and a mode determination circuit that determines the broadcasting mode of the received channel, and also displays the received channel and its broadcasting mode as channel letters and mode letters on the image display element. a display signal generating means for generating a display signal for displaying on the screen; and a display signal generating means for generating a display signal for displaying on the screen; a channel display switching means for controlling the display signal fixing means in response to the above, and a channel display switching means for controlling the display signal fixing means, and a channel display switching means for controlling the display signal fixing means; It is characterized by comprising one stage of mode display switching for controlling the display signal generating means according to mode information, and one timer means for controlling the time during which the channel characters and the mode characters are displayed on the image display element. A display device for a television receiver. (2) The television receiver according to claim 1, wherein the timer means controls to display channel characters and mode characters for a certain period of time from the time the power is turned on. Machine display device. (:4 The timer means detects a change in the receiving IS broadcasting mode and displays the channel letter and mode letter for a certain period of time from the time of the change. g!i and q!I “Claim 1
A display device for a television receiver according to paragraph 1. A patent claim characterized in that the retimer means detects a change in the reception channel and performs a 1tilJ# function that changes the channel character and mode character for a certain period of time from the time of the change. A display device for a television receiver according to item 1. 2. A display device for a television receiver according to claim 1, wherein the timer means continuously displays channel characters and controls only the display time of mode characters.