JPH0575940A - Cathode-ray tube display device - Google Patents

Abstract

PURPOSE:To allow a user to visually recognize a picture-erased state by erasing a picture display at the time of specifying a picture erasing mode and displaying the specified picture erasing mode on a screen. CONSTITUTION:When a picture erasing button is depressed, a reason message p1 and a restoring operation message p2 are displayed on the screen of a color image receiving tube and then the screen is dimmed. The screen is turned to the picture erasing mode and a reason message p4 for the reduction of brightness is displayed on the screen up to the reset of the picture erasing mode. Only for 3 seconds before turning the color image receiving tube to the picture erasing state, the messages p1, p2 are displayed. Thereby even when the color image receiving tube is turned to picture erasing information, the user can visually recognize the picture erasing state, and at the time of requiring the change of the picture erasing information to another state, the user can execute required operation without vacillating the execution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube display device suitable for application to, for example, a television receiver capable of receiving not only general television broadcasting but also satellite broadcasting.

[0002]

2. Description of the Related Art In recent years, in addition to general television broadcasting such as VHF and UHF, a television receiver capable of receiving satellite broadcasting has been proposed.

Such a television receiver has a satellite broadcast receiving section for receiving satellite broadcasts in addition to a tuner for general television broadcasts.

In such a television receiver, after turning on a mechanical switch (which is called a standby state or the like), for example, a main power source can be turned on or off by a remote controller or the like. ..

When the main power source is turned on, power is supplied to the tuner for general television broadcasting and the satellite broadcasting receiving section respectively, and these perform reception and output operations.
When the main power supply is turned off, the power supply to the general television broadcast tuner and the satellite broadcast receiving unit is stopped, and the reception and output operations thereof are stopped.

Therefore, in this case, the surface of the color picture tube is in a black state in which the mechanical power switch of the television receiver is turned off.

[0007]

By the way, in satellite broadcasting, not only good image quality of video data but also good sound quality of its audio data (PCM data) are used. Is being done.

[0008] This broadcast (called St.GIGA)
Is currently being conducted by Japan Digital Audio Broadcasting Co., Ltd.

When such a broadcast of audio is received by the television receiver as described above and the received audio is enjoyed, even if the surface of the color picture tube is turned on, it is possible to save energy. Not an effective measure.

Further, in the case of recording the received image in a VTR or the like as an external device such as satellite broadcasting, when it is desired to turn off the color picture tube, the television receiver as described above does this. I couldn't.

Therefore, there is a demand for a television receiver in which only the color picture tube can be turned off by an operation other than the operation of the power switch by the user.

However, if the color picture tube is simply turned off, the television set may be turned off by the power switch, or the color picture tube may be turned off by a switch other than the power switch. It is not possible to let the user recognize whether it is turned off, not only causing confusion to the user,
When the television receiver is operated to bring it to another state, there is a possibility that an accurate operation cannot be performed.

Therefore, only when the color picture tube is turned off only by the switch for turning off only the color picture tube other than the power switch, for example, "" The screen disappears in the picture erasing mode at a predetermined position of the color picture tube. Only when the color picture tube is turned off by a switch that turns off only the color picture tube after displaying a message such as " It is also conceivable to display a message such as "blurring mode" on the screen.

However, for example, when a message such as "image-erasing mode" is kept displayed in the image-erasing state, only the message portion of the color picture tube has a high brightness level, so that the picture quality of the color picture tube is reduced. This leads to deterioration of the fluorescent surface of the part.

The present invention has been made in view of the above points. Even when the color picture tube is in the image-erasing state, the user can visually recognize the fact that the color-picture tube is in the image-erasing state. In order to provide a cathode ray tube display device capable of performing a desired operation without hesitation when it is desired to set the state, and preventing deterioration of a display portion showing a picture erasing mode of a color picture tube. It is a thing.

[0016]

In the cathode ray tube display device of the present invention, for example, as shown in FIGS. 1 to 10, the screen display is erased by the designation of the erase mode, and the display showing the designated erase mode is displayed. It was designed to be performed on the surface.

The cathode ray tube display device of the present invention is shown in FIG.
As shown in FIG. 10, in the cathode ray tube display device in which the screen display is performed so that the brightness level becomes black in the image erasing mode, the image erasing mode is displayed on the screen and the erasing mode is displayed. The display brightness level is set to an intermediate level.

[0018]

According to the present invention described above, the screen display is erased by the designation of the image erasing mode, and the display showing the designated image erasing mode is displayed on the tube surface. Therefore, the color picture tube is erased. Even in the image state, the user can visually recognize the fact, and can perform a desired operation without hesitation when the user wants to change from this image erasing state to another state.

Further, according to the present invention described above, since the display indicating the image erasing mode is displayed on the tube surface and the luminance level of the display indicating the image erasing mode is set to an intermediate level, the color picture tube is erased. Even in the image state, the user can visually recognize that, and when the user wants to change from this blank state to another state, he or she can perform the desired operation without hesitation. It is possible to prevent the deterioration of the display portion of the picture tube in the image-erasing mode.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the cathode ray tube display device of the present invention will be described in detail below with reference to FIG.

In FIG. 1, reference numeral 1 denotes an antenna, which receives a television high frequency signal in the VHF band or the UHF band.

The television high frequency signal is supplied to the tuner 2.

The tuner 2 selects a television high frequency signal received by an antenna according to a control signal from the microcomputer 16.

This microcomputer 16 is a video R
It has an AM, a ROM and a RAM, and supplies to the tuner 2 a control signal based on a channel information signal supplied from the operation panel 18 and the remote controller 20 via the light receiver 19.

Further, the microcomputer 16 is
Various operations are performed based on the oscillation signal from the oscillator 16a, and various parameters set by the user to be described later are stored in the ROM 17.

The tuner 2 converts the television high frequency signal obtained by tuning into an intermediate frequency signal of 58.75 MHz for video and 54.25 MHz for audio.

Then, the video intermediate frequency signal and the audio intermediate frequency signal are subjected to processing such as amplification, detection, automatic gain control and various signal processing, and then supplied to the selector 3.

As shown in the figure, the selector 3 selects any of the video and audio signals from the input terminal group 4, the video and audio signals from the tuner 2, and the video and audio signals from the satellite broadcast receiving section 22 described later. Is selected according to a control signal from the microcomputer 16, and the selected video and audio signals are supplied to the video processing circuit 6 and the audio processing circuit 7, respectively.

As shown in the figure, the input terminal group 4 and the output terminal group 5 are connected, for example, to the video and audio input terminals of the VTR 23 as an external device and any of the video and audio output terminals of the output terminal group 5. Then, the video and audio output terminals of the VTR 23 are connected to any of the video and audio input terminals of the input terminal group 4.

The video processing circuit 6 separates the carrier color signal from the composite video signal from the selector 3 and reproduces the color difference signal from the carrier color signal.

Then, the color difference signals and the luminance signals are combined to obtain the R, G, B primary color signals necessary for driving the color picture tube, and the primary color signals R, G, B are supplied to the color picture tube. ..

Further, the video processing circuit 6 includes a selector 3
The signals for driving the vertical and horizontal deflection coils are formed from the composite video signal of the above, and these signals are supplied to the vertical and horizontal deflection coils of the color picture tube 8 not shown.

Further, the video processing circuit 6 is controlled by the microcomputer 16 so that the microcomputer 16
The R, G, B signals for further display (channels, etc.) are supplied to the color picture tube 8, or are supplied to the color picture tube 8 together with the R, G, B signals of the image.

On the other hand, the audio processing circuit 7 performs processing such as amplification and other signal processing on the audio signal from the selector 3 and supplies this audio signal to the speaker 9.

Next, the satellite broadcast receiving unit 22 will be described. 11 receives an FM television signal in the frequency band of 12 GHz from the active satellite, and receives the received FM television signal in a 1 GHz band by a converter (not shown). First
A parabolic antenna that converts to an intermediate frequency (the same applies to a BS planar antenna), the 1 GHz intermediate frequency signal received and converted by the antenna 11 is supplied to the BS tuner 12.

The BS tuner 12 selects a signal band from the first intermediate frequency signal of 1 GHz band from the antenna 11 according to a control signal from the microcomputer 16 (by a tuning operation by the operation panel 18 or the remote controller 20). Then, the second intermediate frequency signal is obtained, FM demodulated, and then supplied to the video processing circuit 13 and the audio processing circuit 14, respectively.

The video processing circuit 13 performs various signal processing on the FM demodulated signal from the BS tuner 12 to obtain a video signal, and supplies this video signal to the selector 3.

The audio processing circuit 14 band-pass filters the TV signal after FM demodulation, and the band-filtered TV signal is 4-phase DPSK (Differential Phasing).
eShift Keying) demodulation, various signal processing is performed to obtain an audio signal, and the audio signal is supplied to the selector 3.

The television main body section 10 and the satellite broadcast receiving section 22 are driven by the power source from the power source circuit 21, respectively.

The power supply circuit 21 obtains various drive power supplies from the power supply supplied from the general commercial power supply through the plug 24, and supplies these to each unit according to the control signal from the microcomputer 16.

The power supply circuit 21 is normally (in a so-called standby state in which the original mechanical switch (not shown) is not turned off), which is normally operated by the power source converted by the transformer 25.
When the switch (main power switch) 15 is turned on by 6, the power supply circuit 21 supplies power to each unit by supplying a control signal.

Actually, VHF and UHF television broadcasts, satellite broadcasts and various external devices (in this example, VT
R23) to enjoy the image or to record the image and sound of the television broadcast or the satellite broadcast on the VTR 23 or the like, the switches of the operation panel 18 (not shown)
Or operate the remote controller 20.

Among the buttons of this remote controller 20,
20a is a power button, and each time the power button 20a is pressed,
For example, an infrared signal from the controller 20 is supplied to the microcomputer 16 via the light receiver 19,
The power supply circuit 2 is controlled by the microcomputer 16.
The power supply to each unit by 1 is started or stopped, and the television receiver is turned on or off.

Similarly, an infrared signal is supplied to the microcomputer 16 through the light receiver 19 by the operation of the remote controller 20, and the microcomputer 16 which has received the signal performs control according to the signal. ..

Reference numeral 20b denotes an input switching button, which is connected to the received video and audio signals from the tuner 2, the received video and audio signals from the BS tuner 12, and the input terminal group 4 each time the input switching button 20b is pressed. External device (VTR
23, etc.) are sequentially selected by the selector 3 under the control of the microcomputer 16, and the selected video signal is input to the video processing circuit and the selected audio signal is input to the audio processing circuit. Each is supplied.

Therefore, each time the input switching button 20b is pressed, an image of a VHF or UHF television broadcast is displayed on the surface of the color picture tube 8 and the output of the audio from the broadcast from the speaker 9 and the satellite. The image of the broadcast image on the screen of the color picture tube 8 and the output of the audio of this broadcast from the speaker 9 and the image of the image from an external device such as the VTR 23 on the screen of the color picture tube 8 and The audio output from the speaker 9 is sequentially performed.

Reference numeral 20c denotes a channel switching button, and a signal indicating a large channel number is pressed every time the (+) side is pressed (or pressing time) shown in the figure, and is small each time the (-) side is pressed (or pressing time). A signal indicating the channel number is supplied to the microcomputer 16, respectively.

Therefore, the tuner 2 or the BS tuner 1
Channel selection is performed in 2, and a desired image specified by the channel switching button 20c can be projected on the surface of the color picture tube 8 and the speaker 9 can output the sound of the desired channel.

A volume button 20d is provided for the microcomputer 1 each time the (+) side shown in the figure is pressed (or the pressing time).
6, the volume data supplied to the voice processing circuit 7 becomes louder, and the volume of the voice output from the speaker 9 becomes louder.

Each time the (-) side is pressed (or the pressing time), the volume data supplied from the microcomputer 16 to the audio processing circuit 7 becomes small, and the volume output from the speaker 9 becomes small.

Reference numeral 20e designates a menu button, which is the menu button 2
When 0e is pressed, the menu data developed on the internal video RAM (not shown) is read out by the microcomputer 16, and the menu data is read as R, G,
The B signal is supplied to the color picture tube 8 through the video processing circuit 6 and displayed as a menu image on the surface of the picture tube 8.

The data loaded in the video RAM is read from an internal ROM (not shown).

An example of this menu image is shown in FIG.

That is, when the menu button 20e of the remote controller 20 is pressed, the menu image m as shown in FIG. 2 is displayed on the surface of the color picture tube 8.

In FIG. 2, m3 is a cursor, and m1 is a symbol for making it easier to visually judge the item m2.

A selection / determination roller 20f is used when the above-mentioned menu image m is displayed on the tube surface of the color picture tube 8, and the roller 20f is rotated to one side or the other so that each item m2 of the menu is displayed. The item m2 can be selected by locating the cursor m3 to the left of the symbol m1 and the selected item m2 can be determined by pressing the roller 20f.

Further, as shown in FIG. 3, the menu image m
When the item m2 is selected and determined in, the image n of the nth layer is displayed on the tube surface of the color picture tube 8.

In FIG. 3, mb is a symbol for making it easier to visually judge the item m2 for returning to the immediately preceding layer, and m3 is a cursor.

For example, the symbol m1 of the item m2 determined in FIG. 2 (in this case, "picture quality / sound quality") is shown in FIG.
It becomes the symbol mb of the item m2 for returning to the previous hierarchy in.

Further, the other items m2 are items and parameters etc. of the layer further below. The image n of the nth layer has an item m2 displayed as "return" as shown in FIG.

For example, the roller 20f is rotated in the same manner as described above, the cursor m3 is positioned to the left of the symbol m1 of another desired item (parameter etc.) m2 (not shown), and the item m2 is selected. By pressing 20f, the selected item m2 is determined, and the image n of the nth layer as shown in FIG. 3 is set, and after setting, etc., the cursor m3 is placed on the left side of the symbol mb of the "return" item m2 Is rotated by rotating the roller 20f to select the "return" item m2, and the roller 20f is pressed to display the menu image m shown in FIG. 2 on the tube surface of the color picture tube 8. Can be issued.

Parameter data and the like of each item changed as a result of being operated in such a procedure are stored in a ROM (for example, EE).
PROM) 17.

To stop displaying the menu image m on the color picture tube 8, the menu button 20e is pressed.

In this way, the microcomputer 16 stops outputting the menu data signal, so that the menu image m is not displayed on the color picture tube 8.

In the television receiver of this example,
When recording the image and sound of the received satellite broadcast (in the mode in which only the satellite broadcast receiving unit 22 is turned on, not the reserved recording in which time is set in advance), the illustration is omitted.
When the image erasing button of another remote controller or the image erasing button of the operation panel is pressed, the reason message p1 and the return operation message p2 are displayed on the surface of the color picture tube 8 as shown in FIG. The screen becomes black (the state where the color picture tube 8 is turned off) (see FIG. 6), or, as shown in FIG. 10, the screen becomes black (the surface of the color picture tube 8). (A state in which nothing is displayed on the upper side) The image is displayed in the image erasing mode screen p3 and, for example, a reason message p4 for lowering the brightness level is displayed until the image erasing mode is released.

First, as shown in FIG. 5, the reason message p
1 and the return operation message p2 are projected on the tube surface of the color picture tube 8 and then the screen turns black (the color picture tube 8 is turned off) (see FIG. 6). It will be described with reference to FIG.

First, in step 100, for example, it is judged whether or not the erase button of another remote controller or the button of the operation panel in FIG.
If “ES”, the process proceeds to step 110, and if “NO”, the process proceeds to step 130.

In step 110, it is determined whether or not the image erasing button of the other remote controller or the button on the operation panel described above has been pressed, or whether or not the recording of the video or audio of the received satellite broadcast has been set. If “YES”, the process proceeds to step 120, and if “NO”, step 130.
Move to.

In step 130, other processing is performed, and the process returns to step 100.

In step 120, as shown in FIG. 5, the reason message p1 and the return operation message p2 are displayed on the surface of the color picture tube 8. Then, the process proceeds to step 140.

As a method of returning, for example, the roller 20f described above is pressed (clicked).

In step 140, it is determined whether or not 3 seconds have elapsed. If "YES", the process proceeds to step 150, and if "NO", the process proceeds to step 140 again.

In step 150, the control signal is supplied to the power supply circuit 21 to cause the television main body 1 of the power supply circuit 21 to operate.
Stop the power supply to 0.

Therefore, the television main body 10 is turned off, which turns off the color picture tube 8 and its tube surface is the same as the state where the main power switch 15 of the television receiver is turned off as shown in FIG. Become.

As is apparent from the above, in the present example, the color picture tube 8 is set to the blanking state for 3 seconds before the color picture tube is set to the blanking state by designating the blanking mode. Reason message P1 and return operation message p
2 is projected on the surface of the color picture tube 8, and after that, the color picture tube 8 is put in the off state. Therefore, even if the color picture tube is in the off state, it can be visually used. When the user wants to change from this blanking state to another state, the user can perform a desired operation without hesitation.

Further, the color picture tube 8 can be turned off in accordance with the preference at the time of broadcasting only the sound like "St.GIGA" described above, and the energy saving measures can be realized.

Next, the screen turns black (nothing is projected on the tube surface of the color picture tube 8).
3 and, for example, the brightness level reason message p4
A case will be described in which the image is displayed until the cancellation of the picture erasing mode.

FIG. 7 shows an example of a circuit configuration for lowering the level of the reason message p4.

That is, the output level of the primary color signal R of the microcomputer 16 shown in FIG. 1 is divided into, for example, 1/2 by the resistors R1 and R2, and the output level of the primary color signal G is divided by the resistors R3 and R4. For example, 1 /
The output level of the primary color signal B is divided into, for example, 1/2 by the resistors R5 and R6.

Then, the level is 1 together with the synchronization signal Ys.
The primary color signals R, G, and B divided by / 2 are supplied to the video processing circuit 6 shown in FIG.

Then, the video processing circuit 6 forms a signal to be supplied to the color picture tube 8 based on the synchronizing signal Ys and the R, G and B signals, as shown in FIG.

In FIG. 9, the portion of high level "1" other than the R, G and B signals is the synchronizing portion, and when this signal is supplied to the color picture tube 8, the existence of the R, G and B signals is present. Only the portion to be turned on is projected on the tube surface of the color picture tube 8, and the other portion of the low level "0" becomes the black level, for example.

Further, in this example, as shown in FIG. 7, the levels of the R, G, and B signals are divided and set to 1/2 level, so that, for example, color image reception is performed until the image erasing state is released. Reason message p4 displayed on the surface of tube 8
Is displayed at a so-called gray level as shown in FIG.

Next, the operation in the above-mentioned image erasing mode will be described with reference to the flowchart of FIG.

First, in step 200, it is judged whether or not the image is in the erase mode. If "YES", the process proceeds to step 210, and if "NO", the process proceeds to step 220.

In step 210, the image is erased. That is, the synchronizing signal Ys is supplied to the color picture tube 8. Then, the process proceeds to step 230.

At step 220, other processing is performed. Then, the process proceeds to step 200 again.

In step 230, as shown in FIG. 7, the primary color signals R, G, B divided into 1/2 are supplied to the color picture tube 8, respectively.

As described above, in the present example, in the picture erasing mode, the color picture tube 8 is blackened on the tube surface by the synchronizing signal Ys, and the primary color signals R, G and B are further divided into 1/2. Since the reason message p4 for supplying the image is supplied and the reason message p4 indicating the image erasing state is displayed in gray level, even if the color picture tube 8 is in the image erasing state, the user can visually recognize the fact. However, it is possible to perform a desired operation without hesitation when it is desired to change the image-erasing state to another state, and it is possible to prevent deterioration of the display portion of the color picture tube 8 in the image-erasing mode.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various other configurations can be adopted without departing from the gist of the present invention.

[0091]

According to the present invention described above, the screen display is erased by the designation of the image erasing mode, and the display showing the designated image erasing mode is performed on the tube surface. Even when the image is in the off state, the user can visually recognize it, and if the user wants to change from this off state to another state, he / she can perform desired operation without hesitation is there.

Further, according to the present invention described above, since the display indicating the image erasing mode is displayed on the tube surface and the luminance level of the display indicating the image erasing mode is set to an intermediate level, the color picture tube is erased. Even in the image state, the user can visually recognize that, and when the user wants to change from this image-erasing state to another state, he / she can perform the desired operation without hesitation and receive a color image. There is an advantage that it is possible to prevent the deterioration of the display portion showing the picture erasing mode of the tube.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a cathode ray tube display device of the present invention.

FIG. 2 is a diagram for explaining an embodiment of the cathode ray tube display device of the present invention.

FIG. 3 is a diagram for explaining an embodiment of the cathode ray tube display device of the present invention.

FIG. 4 is a flowchart for explaining an embodiment of the cathode ray tube display device of the present invention.

FIG. 5 is a diagram for explaining an embodiment of the cathode ray tube display device of the present invention.

FIG. 6 is a diagram for explaining an embodiment of the cathode ray tube display device of the present invention.

FIG. 7 is a configuration diagram showing a main part of an embodiment of a cathode ray tube display device of the present invention.

FIG. 8 is a flowchart for explaining an embodiment of the cathode ray tube display device of the present invention.

FIG. 9 is a waveform diagram for explaining an embodiment of the cathode ray tube display device of the present invention.

FIG. 10 is a diagram for explaining an embodiment of the cathode ray tube display device of the present invention.

[Explanation of symbols]

 22 Satellite broadcasting receiver

Claims (3)

[Claims] 1. A cathode ray tube display device, characterized in that a screen display is erased by designating a blanking mode, and a display indicating the designated blanking mode is displayed on a tube surface. 2. The cathode ray tube display device according to claim 1, wherein a restoration method for performing screen display again is also displayed on the tube surface by designating a blanking mode. 3. A cathode ray tube display device in which a screen display is performed so that a brightness level is black in the image erasing mode, a display indicating the image erasing mode is performed on the screen, and A cathode ray tube display device characterized in that the luminance level is set to an intermediate level.