JP2000278620A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a user to easily view the display of a channel state in the case of automatic searching. SOLUTION: When a user operates an automatic search key 19a of a key operation section 19 in this television receiver, a control section 20 searches channels from the channel 1 up to the channel 62 and a CRT 17 displays all cannel information in terms of OSD via a synthesizer 16. The CRT 17 displays the information in a way that the user can identify the state of the channels such that all the channels 1-62 are displayed simultaneously, channels under selection are displayed in yellow, a channel whose broadcast signal is received during the channel selection is displayed in white, and preset channels are surrounded with a circle. Thus, the user can grasp the state of all the channels at a glance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television device capable of setting an auto search mode. In detail, when set to the auto search mode, the presence / absence of broadcast signals on a plurality of channels to be searched is simultaneously displayed on a screen, so that a user can easily determine whether broadcast signals are received on all channels. The present invention relates to a television device which can be grasped in the following manner.

[0002]

2. Description of the Related Art An auto search mode is used when a user wants to check a channel that can receive a broadcast signal.
When the auto search mode is set by a key operation of the user, for example, the channels are sequentially selected from a lower channel. As shown in FIG. 5, during a period when a channel capable of receiving a broadcast signal is selected, the channel is blinked at the upper right of the screen together with the video display.

[0003]

As described above, in the display in the auto search mode, if the number of channels that can receive the broadcast signal increases, the following inconveniences occur. For example, display CH1 of channel 17
If you want to check if the user was able to receive the broadcast signal on 12 channels while 7 was blinking,
An operation of once terminating the auto search mode and selecting 12 channels is required.

It is therefore an object of the present invention to provide a television apparatus which allows a user to easily grasp whether or not a broadcast signal has been received on all channels in an auto search mode.

[0005]

SUMMARY OF THE INVENTION A television apparatus according to the present invention is a television apparatus capable of setting an auto search mode in which a plurality of channels are sequentially selected. Display control means for simultaneously displaying on a screen whether or not a broadcast signal has been received in a plurality of channels. The display control means sets a display portion corresponding to the selected channel to the first channel.
And a display portion corresponding to the channel on which the broadcast signal was received during tuning is displayed in the second state. In addition, a display portion corresponding to a preset channel is further displayed in a third state.

In the present invention, when the auto search mode is set, a state in which a plurality of channels are sequentially selected is set. At this time, the presence or absence of the reception of the broadcast signal in all the channels is simultaneously displayed on the screen.
In this case, the display portion corresponding to the selected channel is the first channel.
, For example, it is displayed in yellow. The display portion corresponding to the channel on which the broadcast signal was received during the channel selection is displayed in the second state, for example, green. As a result, the user can easily grasp at a glance whether or not a broadcast signal has been received on all channels.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a television apparatus 10 according to an embodiment of the present invention. The television apparatus 10 includes a microcomputer, a control unit 20 for controlling the entire operation, an antenna 11 for receiving a broadcast signal, and a plurality of broadcasts received by the antenna 11. A tuner 12 for selecting a broadcast signal of a predetermined channel from the signals and outputting an intermediate frequency signal corresponding to the broadcast signal. The tuning operation in the tuner 12 is controlled by the control unit 20 based on the operation of the key operation unit 19 by the user.

The television apparatus 10 further includes a video intermediate frequency amplifying circuit 13 for amplifying an intermediate frequency signal output from the tuner 12, and performs a detection process on the intermediate frequency signal amplified by the amplifying circuit 13. It has a video detection circuit 14 for obtaining the video signal of the above-mentioned predetermined channel, and a video amplification circuit 15 for amplifying this video signal. Here, the video signal from the video detection circuit 14 is also sent to a synchronization signal detection circuit 22 that detects a horizontal synchronization signal. The detection output of the synchronization signal detection circuit 22 is
Of sent.

The television device 10 has an on-screen display circuit (hereinafter, referred to as an “OSD circuit”) 21 for outputting a character display signal. As will be described later, when the auto search key 19a arranged on the user's key operation unit 19 is operated to set the auto search mode, the television apparatus 10 sequentially tunes from a lower channel. become. In this auto search mode, the presence / absence of reception of a broadcast signal in all channels (channels 1 to 62) is simultaneously displayed on the screen. A program for a control operation in the auto search mode, character data for screen display, and the like are stored in a ROM 20 b provided in the control unit 20.
The control unit 20 also includes a RAM 20a, which is used as a temporary storage unit for screen display and the like. The OSD circuit 21 generates a character display signal based on the display data supplied from the control unit 20.

The television apparatus 10 also includes a synthesizer 16 for synthesizing a video signal from the video amplifier circuit 15 with a character display signal from the OSD circuit 21 and an image based on the video signal output from the synthesizer 16. Picture tube (CR
T) 17.

The operation of the television device 10 shown in FIG. 1 will be described. The broadcast signal received by the antenna 11 is supplied to a tuner 12, a broadcast signal of a predetermined channel is selected, and an intermediate frequency signal corresponding to the broadcast signal of the predetermined channel is output from the tuner 12. The intermediate frequency signal is amplified by an intermediate frequency amplifier circuit 13 and then supplied to a video detection circuit 14 for detection. The video signal output from the video detection circuit 14 is amplified by a video amplification circuit 15 and then synthesized. The image is supplied to a picture tube 17 via a container 16. As a result, the picture related to the broadcast signal of the above-mentioned predetermined channel is displayed on the picture tube 17.

Next, the control operation of the control unit 20 when the user operates the auto search key 19a arranged on the key operation unit 19 to set the auto search mode will be described with reference to FIG.
This will be described with reference to the flowchart of FIG.

First, in step ST40, N indicating a channel to be tuned is set to 1. Next, step ST41
Thus, the numbers of channels 1 to 62 are displayed in white on the screen. FIG. 2 shows a display example. Note that the preset channel numbers are further surrounded by “○” and displayed. Next, in step ST42, it is determined whether or not the value of N exceeds 62. If the value of N does not exceed 62, the channel N is selected in the next step ST43, and in step ST44, the number of N is turned yellow to indicate that the channel N is being selected. I do.

Next, in step ST45, it is determined whether or not a horizontal synchronization signal has been detected by the synchronization signal detection circuit 22, that is, whether or not a broadcast signal has been received on the channel N. In step ST46, it is determined whether or not t seconds have elapsed. Therefore, the detection of the synchronization signal is performed for t seconds. If t seconds have elapsed without detecting a synchronization signal in step ST46, the number N is returned to white in step ST47, indicating that no broadcast signal is received on channel N, and the process proceeds to step ST48. On the other hand, step ST4
If a horizontal synchronization signal is detected in step 5, the number of N is set to green in step ST50 to indicate that a broadcast signal is received on channel N, and the process proceeds to step ST48.
In step ST48, the selection of the channel N ends. Next, the value of N is increased by 1 in step ST49, and thereafter, the process returns to step ST42 to perform the same operation as described above. Thus, as the search operation proceeds, the presence or absence of the broadcast signal of each channel is sequentially determined and displayed.

If N exceeds 62 in step ST42, it means that the selection of all the channels has been completed, and the process proceeds to step ST51. In step ST51, it is determined whether or not a predetermined time T has elapsed. The predetermined time T determines the time for displaying the above-described channels 1 to 62 on the screen after searching all the channels. After the lapse of the predetermined time T, the display on the screen is erased in step ST52, and the process proceeds to step ST53.
Then, the operation of the auto search mode ends.

FIG. 4 is a time chart showing an operation example in the auto search mode shown in FIG. When the auto search key 19a is operated at time t0 (FIG. 4)
A), the auto search mode is set, display of channels 1 to 62 is started (FIG. 4B), and channel 1 is selected (FIG. 4C). When the horizontal synchronization signal is detected at time t1 (FIG. 4E), channel 1 is detected at time t2.
Is changed to green (FIG. 4D), and the channel 1 is tuned to the channel 2 (FIG. 4C, F). If no horizontal synchronization signal is detected after t seconds, the time t
In 4, the display color of channel 2 is returned to white (FIG. 4G), and the channel 2 is tuned to the channel 3 (FIG. 4).
F, H). Similar operations are performed for the following channels. Then, at time tn, the operation shifts to channel 62 tuning.
When the horizontal synchronization signal is detected at time tn + 1 (see FIG.
E), the display color of the channel 62 is changed to green at time tn + 2 (FIG. 4J), the tuning of the channel 62 is completed, and the display of the channels 1 to 62 is deleted at time tn + 3 after T seconds.
The auto search mode ends (FIG. 4B).

As described above, according to the present embodiment, channels 1 to 1 to be searched in the auto search mode are set.
Whether the reception of the broadcast signal on the channel 62 is CRT1
7 are simultaneously displayed on the screen. As a result, the user can know at a glance whether or not a broadcast signal has been received on all channels, and the usability is improved.

In the above-described embodiment, whether or not reception is possible is determined by detecting a horizontal synchronization signal, but this may be performed using a vertical synchronization signal.

Further, in the above-described embodiment, the description has been given of the case where the screen is erased and the auto search mode is terminated when a predetermined time T has elapsed after all the searches have been performed, but the present invention is limited to this. However, for example, by operating the auto search key 19a again, the screen display may be erased and the auto search mode may be ended.

In the above-described embodiment, when displaying channel information in the auto search mode, white, white,
The yellow and green display colors and presets are described with circles. However, any color can be used as long as the status of the channel can be distinguished from the others. It may be identified by doing.

[0021]

According to the present invention, when the automatic search mode is set, the presence or absence of reception of a broadcast signal in a plurality of channels to be searched is simultaneously displayed on a screen. Therefore, the user can easily grasp whether or not the broadcast signal is received in all the channels.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a television device as an embodiment.

FIG. 2 is a diagram showing a screen display example in an auto search mode.

FIG. 3 is a flowchart illustrating a control operation in an auto search mode.

FIG. 4 is a time chart illustrating an example of a control operation in an auto search mode.

FIG. 5 is a diagram illustrating an example of a screen display in a conventional auto search mode.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Television apparatus 12 Tuner 13 Video intermediate frequency amplification circuit 14 Video detection circuit 15 Video amplification circuit 16 Synthesizer 17 CRT 19 Key operation part 19a Auto search key 20 Control part 21 OSD circuit 22 Synchronization signal detection circuit

Claims (3)

[Claims] 1. A television apparatus capable of setting an auto search mode in which a plurality of channels are sequentially selected. When the auto search mode is set, reception of a broadcast signal in the plurality of channels is performed. A television device, comprising: display control means for simultaneously displaying presence / absence on a screen. 2. The display control means displays a display portion corresponding to a channel being selected in a first state, and displays a display portion corresponding to a channel on which a broadcast signal is received during the channel selection, in a second state. The television device according to claim 1, wherein the display is performed in a state. 3. The television device according to claim 2, wherein said display control means further displays a display portion corresponding to a preset channel in a third state.