JPS60146587A - Portable television - Google Patents

Abstract

PURPOSE:To see a necessary character broadcast at desired frequency after its broadcasting time by providing a video memory and a timepiece with a timer having a reserving function for time and a channel to be set to the program of character multiplex television broadcasting. CONSTITUTION:When video recording of a program of character multiplex broadcasting is reserved, an input circuit 4-b for timer operates in response to the operation of buttons and the timer setting function of the timepiece 15 with the timer function is operated to reserve the program and time. A timer control function operates at the reserved time of program video recording and a signal is outputted to a tuning voltage changeover switch 102 and a video signal output changeover switch 101. A video signal from an IF amplifying and video detecting circuit 9 is supplied to a video signal 17 in character multiplex broadcast video recording and stored in the video memory 18. The information stored in the video memory 18 is reproduced whenever necessary.

Description

[Detailed Description of the Invention] [Technical Field] The invention relates to a portable television with an automatic recording function for text multiplex television broadcasts.

[Prior art]

With conventional television technology, unless a VTR is used, viewers can only reproduce the image and audio information of the broadcast that is sent to them, and when they want to obtain specific information, they must read the program that provides that information. had to be received at the time of

Although viewers of small portable TVs have the advantage of being able to receive broadcasts at any time, they must always receive the broadcasts at a certain time in order to obtain the necessary regulatory information, which may restrict their movements for a certain period of time and If you go beyond this, you will miss out on information, and you will not be able to fully utilize the mobility and convenience that mobile TVs offer.

[Purpose of the invention]

An object of the present invention is to eliminate such drawbacks and to enable users to view desired text information any number of times after the broadcast time.

[(already required)]

The present invention is a television set which is characterized in that the user can set a timer clock having a time and channel reservation machine 11 to match the program of a teletext television broadcast, and an image memory.

[Implementation W]

Hereinafter, the present invention will be described in detail based on the implementation example 1tlJ.

FIG. 1 is a schematic diagram of an embodiment of a portable television according to the present invention.

In Fig. 1, 1 is an antenna, 2 is a reception channel indicator, 6 is a TV screen, 4 is a timer setting button, 5 is a button for setting a timer;
1 is a clock display with a timer, 6 is a monitor lamp for displaying the time on the recording side, and 7 is an 'rv operation knob.

The viewer uses the timer function for the 5th hour to preset the time and channel of the necessary teletext program according to the broadcast program using the button 4. At the set time, the clock's timer function activates, automatically turns on the TV, and activates the TV's reception and image recording functions, regardless of whether the TV is in operation or not. At this time, if the TV is already turned on, the content of the teletext broadcast will be displayed on the screen; if it is not, it will not be displayed. Also, if the reception function and recording function are working properly, the second lamp will light up and the monitor will let you know that the recording is normal. To play back recorded images, simply turn on the power and turn on the playback switch, and you can play back at any time.

FIG. 2 shows a block diagram of a circuit of a liquid crystal black and white TV as an embodiment of the present invention. However, the audio circuit system has been omitted.

In Figure 2, 1 is an antenna, 8 is a tuner, 13
9 is the tuning voltage generation circuit (normally), and 9 is the engineering F amplification circuit.
10 is a video signal processing and output circuit, 11 is a synchronization control circuit, 12 is a panel drive circuit, and 6-h is a black and white panel for TV or multiple broadcast display. Although it is the same as a liquid crystal black and white television, 9 has a detection output function for teletext multiplex broadcasting.

Reference numeral 15 denotes a clock circuit block with a timer function, which has a control function during teletext recording.

Reference numeral 5 denotes a display section of a timer function clock, 4-b is an input port 1ffi'I system for operating (presetting) the timer function and includes a preset button, and 14 is a tuning voltage generating circuit for teletext recording.

To reserve the recording of a program for teletext broadcasting, when button 4 in Figure 1 is operated, the timer function operation input circuit system in Figure 2 4-b is activated, and the timer set function of the timer function clock 15 is activated, and the program is programmed. and the time is reserved.

When the time for program recording reservation comes, the control function of the timer is activated, and a switching changeover control signal is outputted to the video signal output changeover switch of the tuning voltage changeover switch 101 . At the same time, the 14 teletext recording tuning voltage generation circuits receive a control signal that generates a tuning voltage corresponding to the channel according to the reservation of t.
A control signal for detecting the teletext broadcasting and a control signal for operating the teletext recording circuit system no. 9 are output to the F amplification/video detection/video amplification circuit No. 9.

These control signals cause the TV to enter teletext recording mode.

If the TV is in operation at the time of program recording reservation, the tuning voltage h is manually switched from the output voltage of the tuning voltage generation circuit 13 to the output voltage of the tuning voltage generation circuit 14 for teletext broadcast recording. Instead, the tuner receives the reserved channel.

In addition, the poisonous control signal allows 9 units of F amplification, video detection,
The video amplification circuit extracts the teletext broadcast and outputs a video signal demodulated from the teletext broadcast. 0 If the TV is not operating at the time of program recording reservation, the timer function shuts off the power to the entire circuit. It turns on, and the tuning voltage follows the tuning voltage for teletext recording,
Similarly, a video signal incorporating teletext is output. Switch 101 is set to 9 in teletext recording mode.
The circuit F amplification/video detection/video amplification 111++ is connected so that the output of the circuit is input to a circuit system for recording.

16 is a synchronization control circuit when selecting a teletext broadcast, 17 is an output circuit to 11 and an image memory for video signal processing during teletext recording, and 18 is an image memory for teletext recording. These are the circuit system for recording,
At the recording reservation time, the control signal from the 15 timer function clock circuits causes the camera to be activated, and recording to the image memory is executed.

At this time, if each circuit is operating normally,
A control signal Q that turns on the recording monitor lamp switch of B is output from the teletext video signal processing circuit 17 and the output circuit to the image memory,
At the same time, during the program reservation time, the voltage for lighting the monitor lamp for displaying the recording time of the watch with timer function is being output, so the 6 teletext recording display indicates that recording is being performed normally. If TV is being received at the set time for teletext recording when the TV monitor lamp lights up, the entire circuit will be forced into recording mode, and the screen will change from the channel that was being received to the reserved one. The display will switch to a teletext display, but will automatically return to its original state once recording is complete.

The image memory 18 is a memory whose power is always maintained by the image memory 21 and memory backup power supply, so that the memory is not erased until the next recording is performed.

When viewing a teletext video recorded by a viewer,
Turn on the TV and set the changeover switch of the normal broadcast reception/recorded image playback switching circuit 20 to the recorded image playback side. The switching circuit sends a control signal W to the output circuit 19 for playing recorded images, and turns on a switch that sends a timing signal S, which is the output of the synchronization control circuit 104, to the output circuit 19 for playing recorded images. A switching control signal υ and a changeover switch 105 that switches the input of the 12 panel drive circuits output a switching control signal (same <v) that selects the 19 output circuit for playing back recorded images. Through these operations, the 19 recorded image playback output circuit takes out the memory contents from the image memory, and
3-b outputs a signal to the panel drive circuit 12,
The recorded teletext image is displayed.

〔effect〕

Using the present invention, viewers can set the channel and time on a timer in advance according to the teletext program that provides the necessary information, and watch the TV while they are on the go.
There is no need to worry about the broadcast time, no need to operate the TV, so there are no restrictions on your movements, and when you need information, you can play it whenever you need it. You can take full advantage of convenience.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of a small portable TV embodying the present invention. FIG. 2 is a block diagram of a circuit of a portable TV embodying the present invention. 1...Antenna 2...Reception channel display 3...TV screen 3-b...LCD black and white panel 4...For timer setting Button 4-b...
... Input circuit for timer operation 5 ... Clock display with timer function 6 ... Monitor lamp for display during recording 7 ... Knob for TV operation 8 ...・Tuner 9... Engineering F amplification/video detection/video amplification circuit 10
...Video signal processing and output circuit 11...Synchronization control circuit 12...Panel drive circuit 16...Normal reception tuning voltage generation circuit 14.
...Tuning constant pressure generation circuit 15 when recording teletext broadcasting...Clock circuit with timer function 16...Synchronization control circuit when recording teletext broadcasting 17...
Video signal processing for teletext recording and output circuit to image memory 18... Image memory for teletext recording 19...
Recorded image playback output circuit 20...Normal reception/recorded image playback switching circuit 21...
Image memory backup power supply 101...Video signal output changeover switch 102...Tuning voltage selection changeover switch 106...Monitor lamp lighting voltage for display during teletext recording 104...Synchronization control when displaying recorded images Signal connection switch 105... Panel drive circuit input changeover switch α...
・・・・・・TV broadcast RF wave b ・・・・・・Tuner output signal C...”
...Video signal d during normal operation or when receiving teletext broadcasting ...... Synchronization control signal e ...... Input signal f of the panel drive circuit
・・・・・・・・・Panel G・・・・・・・・・
・Selector switch control signal for teletext recording h...Tuning ffi IEt...
.......Tuning voltage during normal reception...
...Tuning voltage k when recording teletext broadcasting...
......Monitor lamp lighting voltage t for display during teletext recording...Control signal to tuning voltage generation circuit during teletext recording...・Outside of the control signal to the 91F amplification/video detection/video amplification circuit during teletext recording......To the synchronization control circuit (16) for teletext recording, video signal processing, and image memory Control signal O to the output circuit (17) of the teletext broadcasting recording synchronization control signal P... Output circuit q to the image memory...
...... Switch control signal γ for lighting up the display monitor lamp during teletext recording ...... Image memory output signal voltage S...
...Synchronization control signal t for playing back recorded images...
...Control signal payment when playing recorded images...
・Control signal υ during recorded image playback... Synchronization control signal during recorded image playback and control signal W for the input signal switching switch of the panel drive circuit... Image memory Backup power supply voltage or higher Applicant Suwa Seikosha Co., Ltd. Agent Patent attorney Tsutomu Mogami

Claims (1)

[Claims] 1. A portable television comprising a timer clock having a time and channel reservation function in accordance with a teletext television program, and an image memory device.