JPH08140010A - Television receiver - Google Patents

Abstract

PURPOSE: To dissolve a failure by inputting a sound volume key at the time of tuning a non-signal channel. CONSTITUTION: A key input part 1 is provided with sound volume up/down keys. When key input is performed, a key input control part 2 inputs control signals to a sound control part 3 and the sound control part 3 controls a sound amplification part and controls an on-screen display part 5 to let on-screen display corresponding to the key input be performed on a display part 7. A non-signal detection part 8 detects the presence/absence of the signals of a selected channel by the presence/absence of synchronizing signals. When non- signal is detected, at least one of the sound volume up/down keys is invalidated and the on-screen display for informing that the key input is invalid is performed on the display part 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having an on-screen display function, and in particular, solves a problem caused by inputting a volume key while selecting a non-signal channel. Related to the television receiver.

[0002]

2. Description of the Related Art Conventionally, in a television receiver having an on-screen display function, when a volume up / down key (sometimes referred to as a volume key) is input, the volume is increased or the volume is indicated by a bar display or the like. It is well known that the on-screen display indicating that the operation is down is being performed.

FIG. 4 is a block diagram showing an example of a conventional television receiver. In FIG. 4, a key input unit 1 is a volume change instruction unit for adjusting the volume, and is, for example, a volume up / down key on the remote controller. Key input part 1
When a key input operation is performed by, the output is input to the key input control unit 2, and the key input control unit 2 processes the key code and supplies a control signal to the voice control unit 3. The voice control unit 3 controls the voice amplification unit 4 based on the input control signal. The audio signal is input to the audio amplification unit 4, and the audio amplification unit 4 amplifies the audio signal to a volume controlled by the audio control unit 3 and supplies the audio signal to the speaker 6. At the same time, the voice control unit 3 controls the on-screen display unit 5 to display on the screen for a certain period of time whether the volume is increased or decreased on the display unit 7 such as a CRT. The key input unit 1, the key input control unit 2, the voice control unit 3, and the on-screen display unit 5 may be configured by, for example, one microcomputer.

The operation of such a conventional television receiver will be described with reference to the flow chart shown in FIG. In FIG. 5, step (abbreviated as S in FIG. 5) 1
It is determined which of the volume up / down keys has been pressed with. If it is the volume up key, an on-screen display indicating that the volume has been increased is displayed in step 2, and the volume is further increased in step 3. On the other hand, if it is determined in step 1 that the volume down key has been pressed, an on-screen display indicating that the volume has been reduced is displayed in step 4, and the volume is further reduced in step 5. Then, after a certain time has passed after the on-screen display in steps 3 and 5, the on-screen display is erased in step 6,
Finish a series of actions.

[0005]

By the way, no sound is output when a no-signal channel is selected, but in the conventional television receiver, the volume key is input when the no-signal channel is selected. Then, control for increasing or decreasing the volume, that is, changing the amplification factor by the audio amplifying unit 4 and accompanying on-screen display by the on-screen display unit 5, is performed.
The following problems occur.

Even if a volume key is input when selecting a non-signal channel, no sound is actually output from the speaker 6.
Then, when the channel is switched, for example, after a lapse of a predetermined time, the sound output from the speaker 6 has the volume set when the non-signal channel is selected. That is, if the volume up key is pressed to set a considerably high volume at the time of selecting a non-signal channel, a louder-than-expected volume sound is output from the speaker 6 when the channel is switched. On the contrary, if the volume down key is pressed to set the volume to a low level, when the channel is switched, only the volume of the volume lower than expected is output from the speaker 6. Therefore, the viewer may be confused by the unexpected sound volume, or the sound volume must be reset to an optimum state.

The present invention has been made in view of the above problems, and provides a television receiver which solves the problem caused by inputting a volume key while selecting a non-signal channel. With the goal.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides a key input unit having a volume up / down key and the volume up / down key. A key input control unit that determines whether or not a control signal is generated, an audio amplification unit that amplifies an audio signal, an on-screen display unit that causes an on-screen display on the display unit, and the audio based on the control signal. A television receiver having a control unit that controls the amplification unit and controls the on-screen display unit so that the on-screen display according to the key input is performed on the display unit. A no-signal detecting means for detecting the presence or absence of a signal of the channel is provided, and when the no-signal detecting means detects no signal,
A television receiver characterized by disabling at least one of the volume up / down keys and performing on-screen display on the display unit to inform that the key input is invalid. is there.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A television receiver of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing an embodiment of a television receiver of the present invention, FIG. 2 is a flow chart for explaining the operation of the television receiver of the present invention, and FIG. 3 is an explanation of the television receiver of the present invention. It is a figure which shows the example of an on-screen display for doing. In FIG. 1, the same parts as those in FIG. 4 are designated by the same reference numerals.

In FIG. 1, a key input unit 1 is a volume change instruction unit for adjusting the volume, and is, for example, a volume up / down key on a remote controller. When a key input operation is performed by the key input unit 1, its output is input to the key input control unit 2, and the key input control unit 2 processes the key code and supplies a control signal to the voice control unit 3. The voice control unit 3 controls the voice amplification unit 4 based on the input control signal. The audio signal is input to the audio amplification unit 4, and the audio amplification unit 4
Amplifies the audio signal so that the volume is controlled by the audio controller 3, and supplies the amplified audio signal to the speaker 6. At the same time, the voice control unit 3 controls the on-screen display unit 5 to display on the screen for a certain period of time whether the volume is increased or decreased on the display unit 7 such as a CRT.

Further, the television receiver of the present invention is provided with a no-signal detector 8 for detecting whether or not the selected channel has no signal. The no-signal detector 8 receives a sync signal from a sync separation circuit (not shown), and detects whether or not the selected channel is no signal based on the presence / absence of the sync signal. The no-signal detector 8 sends the detection signal to the voice controller 3 and the on-screen display 5 when the selected channel is no signal.
Supply to. In this case as well, the key input unit 1, the key input control unit 2, the voice control unit 3, and the on-screen display unit 5 are
For example, it can be configured by one microcomputer.

In the television receiver of the present invention thus constructed, when the no-signal detecting section 8 detects that there is no signal channel, the audio control section 3 accordingly raises / decreases the volume by the key input section 1. The key input operation of the key is invalid. That is, even if the volume key is input, the voice control unit 3 does not control the amplification factor change control by the voice amplification unit 4. At the same time, the on-screen display unit 5 displays a display on the display unit 7 such as a CRT indicating that the input of the volume key is invalid. Note that the key input operation of both the volume up / down keys may be invalidated, or the key input operation of only the volume up key may be invalidated.

The operation of the television receiver of the present invention will be described with reference to the flow chart shown in FIG. Here, an example is shown in which the key input operation of only the volume up key is invalidated. In FIG. 2, it is determined in step (abbreviated as S in FIG. 1) 11 which one of the volume up / down keys is pressed. If the volume up key is selected, the channel selected in step 12 has no signal. Is detected. If there is a signal (if there is no signal), an on-screen display indicating that the volume has been increased is made in step 13, and further, step 1
Turn up the volume at 4. If it is determined that there is no signal in step 12, a message indicating that the input of the volume up key is invalid is displayed on screen in step 15.

As an example of the on-screen display, "key input is invalid" is displayed as shown in FIG. 3 (A), or "no signal" is displayed as shown in FIG. 3 (B). Alternatively, as shown in FIG. 3 (C), it is conceivable to keep displaying the previous volume. Here, the volume is displayed by using the numbers and the bar display together. At this time, the display in FIG. 3C may be in a blinking state. The on-screen display is not limited to these as long as the message informs that the key input is invalid.

On the other hand, if it is determined in step 11 that the volume down key has been pressed, on-screen display indicating that the volume has been reduced is performed in step 16, and
In step 17, the volume is turned down. And step 13,
After a certain time has passed after the on-screen display by 15 and 16, the on-screen display is erased in step 18,
Finish a series of actions.

[0016]

As described in detail above, the television receiver of the present invention is provided with no signal detecting means for detecting the presence or absence of the signal of the selected channel, and the no signal detecting means detects no signal. When it is detected, at least one of the volume up / down keys is invalidated, and the on-screen display for notifying that the key input is invalid is configured to be displayed on the display unit such as CRT. The volume does not change even if you press the volume key when selecting a signal channel.Therefore, when switching channels, the viewer is confused by unexpected volume, or the volume must be reset to the optimum state. It is possible to solve the problem of not becoming.

[Brief description of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a flow chart for explaining the operation of the present invention.

FIG. 3 is a diagram showing an example of on-screen display for explaining the present invention.

FIG. 4 is a block diagram showing a conventional example.

FIG. 5 is a flowchart for explaining the operation of the conventional example.

[Description of Reference Signs] 1 key input unit 2 key input control unit 3 voice control unit (control means) 4 voice amplification unit 5 on-screen display unit (on-screen display unit) 6 speaker 7 display unit 8 no-signal detection unit (no signal) Detection means)

Claims (1)

[Claims] 1. A key input section having a volume up / down key, a key input control section for generating a control signal by discriminating which of the volume up / down keys is input, and amplifying a voice signal. An audio amplification section, an on-screen display means for performing on-screen display on the display section, the audio amplification section based on the control signal, and an on-screen display corresponding to the key input. In the television receiver including the control means for controlling the on-screen display means so as to perform the above, a no-signal detection means for detecting the presence or absence of a signal of the selected channel is provided, and the no-signal detection means is provided. If it is detected that there is no signal, at least one of the volume up / down keys is disabled and the volume is displayed on the display unit. Television receiver which is characterized in that the on-screen display to notify that the key input is invalid.