JP4371913B2 - Display device - Google Patents

Description

  The present invention relates to a display device having a video mute function that stops video display and only outputs audio.

  The display device basically has a function of displaying an image on a liquid crystal panel, a plasma display panel, a cathode ray tube, and the like and outputting sound from a speaker when receiving video and audio signals. On the other hand, today, digital audio systems have been adopted in BS broadcasts or CATV broadcasts, and it has become possible to enjoy clear audio, and display devices with video mutes have been commercialized to enjoy only audio, Further, as in Patent Document 1 and Patent Document 2, proposals have been made for power saving and improvement in usability.

  In Patent Document 1, a tuner circuit, an intermediate frequency circuit for video and audio, an audio output circuit, a switching power supply that supplies independent power supply voltages to a horizontal output / flyback transformer circuit, and an output voltage of the horizontal output circuit The rectified output is rectified by the image that outputs the horizontal drive signal to the horizontal output / flyback transformer circuit, the chroma deflection IC, and the flyback pulse of the horizontal output / flyback transformer circuit. A video muting circuit comprising the X-ray protection circuit for inputting to the X-ray protection circuit terminal of the above-mentioned image and chroma deflection IC through a Zener diode for setting the operation level, and connected to the X-ray protection circuit via a diode Based on the video mute signal from the above video, the horizontal drive signal from the chroma deflection IC Be to the output stop, it proposes to greatly enable power savings in the case of utilizing the television only to the audio output.

  Further, Patent Document 2 proposes that in a display device, video muting can be performed only by connecting an earphone to the earphone terminal, and only audio can be enjoyed, and one audio output provided with a connection detection terminal is provided. When an external earphone is connected to the earphone, it is detected that the microcomputer has been connected, and when a pre-set earphone is connected, the video mute is selected depending on the user's choice of whether to mute the video. This signal is sent to the video processing circuit, and the video processing circuit mutes the video display device based on that signal, so that the user simply turns off the video by connecting the earphone to the earphone terminal and disturbs the surroundings. We propose that you can enjoy only the audio without using it.

JP-A-5-260401 JP-A-9-181992

  However, in both cited documents 1 and 2, once the video mute is set, the video mute is directly applied without the user's confirmation from the next time. There is a risk of anxiety. In other words, the video mute may be set due to an erroneous operation by the user. In this case, it is not possible to immediately determine whether the video mute is applied or not, and especially those who are not familiar with the operation. It is easily predicted that it may be assumed that it has failed. In order to solve such a problem, when a video mute is set, a reconfirmation operation is performed to prevent erroneous setting of the video mute, and the video mute is set for the user. It is thought that it can be made to recognize whether it is.

  The problem to be solved is that once the video mute is set, it will be directly muted without the user's confirmation from the next time, so it is immediately determined whether the video mute has been applied. It is impossible to do this, and there is a risk that a user who is unfamiliar with the operation may assume that it has failed.

The display device of the present invention is a display device having a video mute function,
The display device main body is provided with an erroneous operation preventing means for preventing an erroneous operation for executing the video mute function, and the display device main body and / or the remote control is provided with a video mute function executing means for executing the video mute function. The video mute function executing means is pressed, and after the content of whether or not the on-screen displayed video mute mode may be executed by the erroneous operation preventing means disappears, the press of the video mute function executing means is released. Then, the video mute function is executed .
Further, in the display device according to claim 1, while the content indicating whether or not the video mute mode by the erroneous operation preventing unit may be executed is displayed on the screen, the video mute function executing unit is pressed. When released, the video mute function can be stopped.
The display device of the present invention is a display device having a video mute function, wherein the display device body is provided with erroneous operation preventing means for preventing an erroneous operation of the operation for executing the video mute function, and the display device body and / or the remote controller. The video mute function executing means for executing the video mute function is provided, and the content indicating whether or not the video mute mode may be executed by the erroneous operation preventing means when the video mute function executing means is pressed is displayed on the screen. The video mute function is executed when the pressing of the video mute function executing means is released while the video mute function executing means is released after the on-screen display disappears. The video mute function is stopped.

  According to the display device of the present invention, video muting is performed when listening to music, so that power saving can be achieved while improving the sound field effect, and the user is informed before the video muting mode is executed. Thus, it is possible not only to prevent an erroneous operation of the video mute setting operation for executing the video mute mode, but also to make the user surely recognize whether or not the video mute is set. Moreover, it can confirm by visual confirmation, auditory confirmation, bodily sensation confirmation, or any combination by taking various methods as an alerting | reporting means.

  In the present embodiment, the video mute function is set by the operation of the display device main body or the remote control, and when the video mute mode setting operation is performed by the display device main body or the remote control, the video mute function settable state is notified, In addition to preventing incorrect setting of video mute, the user is surely recognized whether video mute is set or not.

Embodiments of the present invention will be described below.
1 is a perspective view showing a liquid crystal TV applied to an embodiment of the display device of the present invention, FIG. 2 is a front view showing a remote controller for operating the liquid crystal TV of FIG. 1, and FIG. FIG. 4 to FIG. 8 are diagrams for explaining the operation of the liquid crystal TV of FIG. 1 operated by the remote controller of FIG. 2. In addition, the term of function and mode in the following description shall mean substantially the same content, and shall be appropriately used according to the description.

  A liquid crystal TV 100 shown in FIG. 1 includes a liquid crystal panel 101, a brightness sensor 102, a remote control light receiving unit 103, a power lamp 104, an on-timer lamp 105, a headphone terminal 106, a speaker 107, and a bass reflex port 108.

  The liquid crystal panel 101 displays an image. The brightness sensor 102 detects ambient brightness in order to keep the brightness of the liquid crystal panel 101 appropriate. The remote controller light receiving unit 103 receives a signal from a remote controller 200 described later. The power lamp 104 is turned on when a main power (not shown) is turned on. The on-timer lamp 105 lights up when the on-timer is set. The headphone terminal 106 can be equipped with a terminal on the headphone 109 side described later. The speaker 107 outputs sound. The bass reflex port 108 outputs sound from the back side of the speaker 107.

  2 includes a power button 201, a video inversion button 202, a virtual button 203, a video on / off button 204, an off timer 205, an on timer 206, a screen display button 207, a video position button 208, and a brightness sensor button. 209, cursor button 210, determination button 211, return button 212, menu button 213, mute button 214, audio switching button 215, CATV button 216, input switching button 217, volume button 218, channel selection button 219, previous screen button 220, A direct channel selection button 221 and a BS channel button 222 are provided.

  A power button 201 as power on / off means turns on / off the liquid crystal TV 100. The video inversion button 202 inverts the video. The virtual button 203 turns on / off the virtual surround effect. A video on / off button 204 as a video mute function execution means is used to perform a video mute setting operation, and turns on / off the video display. Of course, the video mute function executing means may be provided on the TV main body side of the liquid crystal TV 100. The off timer 205 turns off the power of the liquid crystal TV 100 after a specified time. The on-timer 206 turns on the liquid crystal TV 100 after a specified time. The screen display button 207 confirms the channel being viewed.

  The video position button 208 selects a desired image quality and sound quality. The brightness sensor button 209 switches the screen brightness. The cursor button 210 selects a menu or a specified item. The determination button 211 determines the menu or specified item selected by the cursor button 210. The return button 212 returns to the previous screen. The menu button 213 displays a menu screen.

  The mute button 214 temporarily mutes the sound. The audio switching button 215 switches the audio mode. The CATV button 216 selects a CATV channel. The input switching button 217 switches video input. The volume button 218 adjusts the volume. The channel selection button 219 selects a channel. The previous screen button 220 switches to the previous channel or input currently being viewed. The direct channel selection button 221 selects a channel to be viewed. The BS channel button 222 selects a BS channel.

Next, the outline of the internal configuration of the TV main body of the liquid crystal TV 100 of FIG. 1 will be described with reference to FIG.
The liquid crystal TV 100 includes a tuner circuit 120 that tunes a signal from the BS antenna 110 or the U / V antenna 111. The video signal from the BS antenna 110 or the U / V antenna 111 tuned by the tuner circuit 120 is output to the input switching circuit 126. The input switching circuit 126 also outputs audio and video signals from the other input circuit 112 as external input means.

  The audio signal from the BS antenna 110 tuned by the tuner circuit 120 is output to the audio multiplexing circuit 123 via the audio amplifier 121 and the input switching circuit 126. The audio signal from the U / V antenna 111 tuned by the tuner circuit 120 is output to the audio multiplexing circuit 123. The left and right audio signals from the audio multiplexing circuit 123 are output to the speaker 107 via the 1-bit amplifier 124. When the headphones 109 are connected, the left and right audio signals from the audio multiplexing circuit 123 are output to the headphones 109 via the headphone amplifier 125.

  On the other hand, the video signal from the input switching circuit 126 is output to the VPC circuit 130 via the GR circuit 127, the 3DY / C circuit 128, and the Y / C switching circuit 129. The VPC circuit 130 outputs ITU-format video data and a synchronization signal to the video processor 131. The RGB signal is output from the video processor 131 to the QS built-in controller 132. The QS built-in controller 132 controls the display operation of the liquid crystal panel 101 based on the operation procedure of the SDRAM 133.

  A main body key 113 and a remote control light receiving unit 103 are connected to the microcomputer 134 serving as erroneous operation preventing means. The microcomputer 134 outputs a control signal to the VPC circuit 130 and the video processor 131 and outputs an OSD signal to the QS built-in controller 132 based on a signal received by the main body key 113 or the remote control light receiving unit 103.

  Here, the OSD signal is a signal for causing the liquid crystal panel 101 to display content different from the video in an overlapping manner. Further, the microcomputer 134 has external input detection means for detecting the input of audio and video signals from the other input circuit 112 as the external input means. Here, the audio is detected, for example, by detecting the level of the audio signal, and the video signal is detected, for example, by the presence or absence of a synchronization signal.

  The inverter drive transistor 135 operates in response to a control signal from the video processor 131, and turns on / off or dimms the backlight 138 via the DC / AC common circuit 136 driven by the 12V power source 137. The operation of the backlight 138 is detected by the failure detection circuit 139, and the detection result is output to the microcomputer 134.

Next, operations related to video muting will be described.
In the following description, it is assumed that an operation related to video mute is performed in response to a signal from the remote controller 200.

  First, as shown in FIG. 4, when the video on / off button 204 of the remote controller 200 is pressed (step S1), the microcomputer 134 receives the signal via the remote controller light receiving unit 103. When executing the video mute mode, the microcomputer 134 outputs an OSD signal for confirmation to the QS built-in controller 132 (step S2). At this time, as shown in FIG. 6, for example, as shown in FIG. 6, the QS built-in controller 132 displays on-screen the content “Please press the video on / off button again to turn it off”. Notification is made by display (step S3). This on-screen display content indicates that the video mute function can be set.

  Next, when the video on / off button 204 of the remote controller 200 is pressed again (step S4), the microcomputer 134 receives the signal via the remote controller light receiving unit 103. When the microcomputer 134 recognizes that the video on / off button 204 has been operated twice, it outputs a control signal to the video processor 131 in order to mute the video signal and turn off the backlight 138 (step S5).

  At this time, the video processor 131 mutes the video signal and outputs a backlight extinction signal to the inverter drive transistor 135. When receiving the backlight off signal, the inverter drive transistor 135 mutes the operation of the DC / AC common circuit 136. Thereby, the backlight 138 is temporarily turned off (step S6), and the video mute mode is set (step S7).

  Here, when the volume button 218 of the remote control 200 is pressed to adjust the volume during the video mute mode (step S8), the signal is received by the remote control light receiving unit 103 and further recognized by the microcomputer 134. The microcomputer 134 outputs an OSD signal for volume adjustment to the QS built-in controller 132. At this time, the volume bar is on-screen displayed on the liquid crystal panel 101 by the QS built-in controller 132, for example, as shown in FIG. 7 (step S9).

  When the volume bar is displayed on the screen, a control signal for lighting the backlight 138 for a predetermined time is output from the microcomputer 134 to the video processor 131. As a result, a backlight lighting signal is output from the video processor 131 to the inverter drive transistor 135. When receiving the backlight lighting signal, the inverter drive transistor 135 operates the DC / AC common circuit 136 to turn on the backlight 138.

  When the microcomputer 134 confirms that the signal generated by the operation of the volume button 218 of the remote controller 200 is not received even after a predetermined time has passed, the microcomputer 134 outputs a control signal to the video processor 131 in order to turn off the backlight 138 as described above. To do. This returns to the video mute mode (step S10).

  When the mute button 214 of the remote controller 200 is pressed during the video mute mode (step S11), the signal is recognized by the microcomputer 134 as described above. The microcomputer 134 outputs an OSD signal for silencing to the QS built-in controller 132. At this time, the QS built-in controller 132 displays on the screen the content indicating that the mute mode is being executed on the liquid crystal panel 101 as shown in FIG. 8, for example (step S12).

  When the content indicating that the mute mode is being executed is displayed on-screen, the control signal for turning on the backlight 138 for a predetermined time is output from the microcomputer 134 to the video processor 131 in the same manner as described above. Is turned on for a predetermined time, and then the backlight 138 is turned off to return to the video mute mode as described above. At this time, the sound output from the speaker 107 is not performed because of the mute mode, but when the mute button 214 of the remote controller 200 is pressed again, mute release is once displayed on the liquid crystal panel 101 by the same procedure as described above. Then, the video mute mode is resumed (step S13).

  Further, when, for example, the virtual button 203 of the remote controller 200 is pressed during the video mute mode (step S14), the backlight 138 is once turned on, and the contents for turning on / off the virtual surround effect on the liquid crystal panel 101 as described above. Is displayed on-screen (step S15), and after a predetermined time has elapsed, the backlight 138 is turned off and the video mute mode is restored (step S16).

  Furthermore, as shown in FIG. 5, when the audio switch button 215 of the remote controller 200 is pressed during the video mute mode (step S17), the backlight 138 is once turned on and the liquid crystal panel 101 is turned on as described above. The contents for selecting heavy sound and stereo on / off are displayed on the screen (step S18), and after a predetermined time has elapsed, the backlight 138 is turned off and the video mute mode is restored (step S19).

  Further, during the video mute mode, for example, the CATV button 216, the input switching button 217, the channel selection button 219, the direct channel selection related to the video selection of the video on / off button 204 or the remote controller 200, video adjustment, video timer, etc. When the button 221, the BS channel button 222, the off timer 205 or the on timer 206, the menu button 213, or the like is pressed (step S20), the microcomputer 134 cancels the video mute mode (step S21), and the normal display mode. (Step S22).

  As described above, in the present embodiment, when the video on / off button 204 of the remote controller 200 is pressed once by the microcomputer 134 provided on the TV main body side of the liquid crystal TV 100, the microcomputer 134 transmits the signal via the remote control light receiving unit 103. Receiving and letting the liquid crystal panel 101 confirm whether or not the video mute mode can be executed is notified by an on-screen display, and when the video on / off button 204 is pressed again, the video mute mode is executed. Therefore, the setting of the video mute mode needs to be pressed twice, so that it is possible not only to prevent erroneous setting of the video mute, but also to ensure that the user recognizes whether the video mute is set. be able to.

  Also, the backlight 138 is turned off during the video mute mode, and when the volume button 218 of the remote controller 200 is pressed to adjust the volume during the video mute mode, the volume bar is turned on as shown in FIG. Since the screen is displayed and the backlight 138 is turned off after a lapse of a predetermined time, the power consumption can be reduced and the environment can be improved.

  This means that during the video mute mode, a sound-related operation such as the mute button 214 of the remote controller 200 being pressed, the virtual button 203 of the remote controller 200 being pressed, or the audio switching button 215 of the remote controller 200 being pressed. By enabling only, it is possible to provide functions that are easy to use for users.

  Further, in this embodiment, since the present invention is applied to the liquid crystal TV 100, it can be started immediately without a standby current as compared with a CRT, so that the viewer can effectively display the effect of the video mute function. There is an effect that does not cause dissatisfaction.

  Further, in the present embodiment, since the present invention is applied to the liquid crystal TV 100, the backlight 138 that consumes about 60% of the power consumption of the liquid crystal TV 100 can be turned off except when it is the minimum necessary. Can be expected to save electricity. Note that even for display devices such as light emitting diodes (LEDs), fluorescent display tubes (VFDs), plasma displays (PDPs), electroluminescences (ELs), etc., the video mute function is being executed by controlling the drive voltage according to the video signal. By disabling the display function, it is possible to concentrate only on the sound, improving the sound field effect and saving power.

  It is also possible to control so that only the means related to audio input, processing, and output operate when the video is muted, which can further reduce the noise generated to the audio circuit along with further power saving effects. If you only listen to music, you can enjoy a clearer sound. This appears more clearly when the audio data of the liquid crystal TV 100 is reproduced by 1-bit audio.

  In the present embodiment, since the video display on the liquid crystal panel 101 is turned off during the video mute mode, it is possible to eliminate the weak point of the low-quality screen at the time of perspective such as when viewing the liquid crystal TV 100 with a mobile phone.

  In this embodiment, the video mute mode is set by pressing the video on / off button 204 of the remote controller 200 twice. However, the present invention is not limited to this, and the video on / off button of the remote controller 200 is set. After the content of whether or not the video mute mode displayed on the LCD panel 101 may be executed disappears, the video mute mode is set by stopping the operation of the video on / off button 204. You may be made to do. As a result, the video mute function executing means is pressed, a notification that the video mute function is selected is performed, and after the user confirms that, the video mute function can be executed. .

  Further, by releasing the press while the notification that the video mute function is selected is being performed, the execution of the video mute function can be stopped.

  Also, as a reverse procedure, the video mute function is executed by releasing the press while the notification that the video mute function is selected is being performed, and the video mute function is executed by releasing the press after the notification is completed. It is also possible to cancel the process.

  In this case, the content indicating whether or not to execute the video mute mode displayed on the screen on the liquid crystal panel 101 is displayed for a predetermined time, so that the user is aware that the video mute mode is set. Can do.

  In this case, if the next operation is not performed while the content indicating whether or not the video mute mode displayed on the LCD panel 101 may be executed is displayed for a predetermined time, the video mute mode is invalidated. Thus, the operation for disabling the video mute mode can be omitted, and the setting can be canceled once during the setting, but the operability is improved.

  Also, in this case, the video mute mode is disabled when the following operation is performed while the content indicating whether or not the video mute mode displayed on the LCD panel 101 may be executed is displayed for a predetermined time. Therefore, an operation for invalidating the video mute mode can be immediately performed, and the operability is improved.

  Also, in this case, when an external input is selected by the TV main body of the liquid crystal TV 100 and / or the remote controller 200, there is no input from the other input circuit 112 as an external input means, or the input from the input circuit 112 is a voice. Also in the case of input, the video mute function can be executed after notification that the video mute function has been selected, as in the case of antenna input as described above.

  Further, in the present embodiment, a case has been described in which the content for confirming whether or not the video mute mode may be executed by the liquid crystal panel 101 is notified by an on-screen display. However, the present invention is not limited to such an on-screen display. You may make it notify by sound, voice, vibration, or any combination, by visual confirmation by on-screen display, auditory confirmation by signal sound or voice, or bodily sensation confirmation by vibration, or any combination Can be confirmed.

  In vibration, for example, when the main body key 113 on the TV main body side of the liquid crystal TV 100 or the video on / off button 204 of the remote controller 200 is pressed once, it is confirmed whether or not the video mute mode may be executed. The main body key 113 or the video on / off button 204 of the remote controller 200 may be vibrated, or in the remote controller 200, the remote controller 200 itself may be vibrated.

  Further, in the present embodiment, a case has been described in which the microcomputer 134 outputs a video mute signal and a control signal for turning off the backlight 138 to cause the video processor 131 to execute the video mute mode. However, the present invention is not limited to this example. Alternatively, the video mute signal and the control signal for turning off the backlight 138 may be output to the VPC circuit 130, and the video mute signal and the backlight 138 are turned off to the input switching circuit 126 and the QS built-in controller 132. A control signal for output may be output.

  Further, the microcomputer 134 does not describe whether or not the set video mute mode is maintained even after the main power of the liquid crystal TV 100 is turned off. However, the main power is not used to prevent the above-described erroneous operation. It is preferable to clear the set video mute mode after being turned off.

  Further, the case where the video on / off button 204 as the video mute setting means is provided on the remote control 200 side has been described. However, the present invention is not limited to this example, and the video on / off button 204 is provided on the TV main body side of the liquid crystal TV 100. Of course, it is also good.

  If the video on / off button 204 as the video mute setting means is not provided on the remote control 200 side or the TV main body side of the liquid crystal TV 100, a predetermined menu item is displayed on the liquid crystal panel 101 or the like, and the menu is displayed. It is also possible to execute the video mute function from the item.

  Further, the case where the microcomputer 134 is provided on the TV main body side of the liquid crystal TV 100 has been described. However, the present invention is not limited to this example, and the microcomputer 134 may be provided on the remote controller 200 side.

  Further, by providing a small monitor screen on the remote controller 200 side and displaying the contents of the various on-screen displays described above on the monitor screen, hand operation can be performed and operability can be further improved.

  The present invention is not limited to a display device having a liquid crystal panel, and can be applied to other display devices that display an image using a light emitting diode (LED), a fluorescent display tube (VFD), a plasma display (PDP), or electroluminescence (EL). In this case, for example, the video mute function can be executed by driving voltage control according to the video signal.

It is a perspective view which shows liquid crystal TV applied to one Embodiment of the display apparatus of this invention. It is a front view which shows the remote control which operates liquid crystal TV of FIG. It is a block diagram which shows the outline | summary of the internal structure of TV main body of liquid crystal TV of FIG. 3 is a flowchart for explaining an operation of the liquid crystal TV of FIG. 1 operated by the remote controller of FIG. 3 is a flowchart for explaining an operation of the liquid crystal TV of FIG. 1 operated by the remote controller of FIG. It is a figure for demonstrating operation | movement of liquid crystal TV of FIG. 1 operated with the remote control of FIG. It is a figure for demonstrating operation | movement of liquid crystal TV of FIG. 1 operated with the remote control of FIG. It is a figure for demonstrating operation | movement of liquid crystal TV of FIG. 1 operated with the remote control of FIG.

Explanation of symbols

100 LCD TV
DESCRIPTION OF SYMBOLS 101 Liquid crystal panel 102 Brightness sensor 103 Remote control light-receiving part 104 Power lamp 105 On-timer lamp 106 Headphone terminal 107 Speaker 108 Bass reflex port 109 Headphone 112 Input circuit 113 Main body key 120 Tuner circuit 121 Audio amplifier 123 Audio multiplexing circuit 126 Input switching circuit 130 VPC Circuit 131 Video processor 132 QS built-in controller 134 Microcomputer 135 Inverter drive transistor 138 Backlight 200 Remote control 201 Power button 202 Video inversion button 203 Virtual button 204 Video on / off button 205 Off timer 206 On timer 207 Screen display button 208 Video position button 209 Brightness sensor button 210 Cursor button 211 Enter button 212 Back Button 213 Menu button 214 Mute button 215 Audio switching button 216 CATV button 217 Input switching button 218 Volume button 219 Channel selection button 220 Previous screen button 221 Direct channel selection button 222 BS channel button

Claims (3)

In a display device having a video mute function,
The display device body is provided with an erroneous operation preventing means for preventing an erroneous operation of the operation for executing the video mute function,
The display device main body and / or the remote control is provided with video mute function execution means for executing the video mute function,
After the video mute function executing means is pressed and the content indicating whether the on-screen display video mute mode may be executed by the erroneous operation preventing means disappears, the press of the video mute function executing means is released. And a display mute function . The display device according to claim 1,
While the content indicating whether the video mute mode may be executed by the erroneous operation preventing means is displayed on the screen, the video mute function is stopped when the press of the video mute function executing means is released. A display device. In a display device having a video mute function,
  The display device body is provided with an erroneous operation preventing means for preventing an erroneous operation of the operation for executing the video mute function,
  The display device main body and / or the remote control is provided with video mute function execution means for executing the video mute function,
  While the video mute function executing means is pressed and the content indicating whether or not the video mute mode by the erroneous operation preventing means may be executed is displayed on the screen, the press of the video mute function executing means is released. Then, the video mute function is executed, and the video mute function is stopped when the video mute function executing means is released after the on-screen display disappears.
  A display device.

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