JP2006295428A - Television - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a television capable of positively and easily performing channel switching and volume control for a main screen and a sub-screen in two-screen display. <P>SOLUTION: The television is provided with a main control section 21 for executing one-screen display processing for causing a display section 11 to display a video image of one channel, and two-screen display processing for causing the display section 11 to display video images of two channels as a main screen and a sub-screen; a remote controller 3 for causing the main control section 21 to execute channel switching and volume control in executing the one-screen display processing, and causing the control section to execute channel switching and volume control for the main screen in executing the two-screen display processing; and a remote controller 5 for causing the main control section 21 to execute at least either of channel switching and volume control for the sub-screen in executing the two-screen display. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a television configured to be able to execute a one-screen display process and a two-screen display process.

As this type of television, a television receiver disclosed in Japanese Patent Laid-Open No. 2003-143432 is known. In this television receiver, when a channel switching key button is operated (depressed) in a state where a program of two television broadcast channels is displayed on two screens as a main screen and a sub-screen, the key button The control unit determines which channel of the main screen and the sub screen is to be switched based on the length of the operation time. Specifically, when the operation time of the key button is longer than a set time (for example, 1 second), the control unit switches the channel of the sub-screen to a channel corresponding to the key button, and the operation time of the key button is 1 When it is shorter than the second, the channel of the main screen is switched to the channel corresponding to the key button. For this reason, in this television receiver, the operation can be simplified to the extent that it is not necessary to select a screen to be switched using a dedicated selection key button or the like when switching channels. Yes.
JP 2003-143432 A (page 5-6, FIG. 1-3)

  However, the above television receiver has the following problems. That is, in this television receiver, the control unit determines whether the screen to be channel-switched is the main screen or the sub-screen based on the length of the key button operation time. For this reason, for example, even if the key button is intended to be operated for a longer time with the intention of switching the channel of the sub-screen, if the actual operation time is shorter than the set one second, the unintended main The screen channel is switched. In such a case, it is necessary to perform an operation of a key button for returning the channel of the main screen and a re-operation of the key button for switching the channel of the sub screen, and the operation becomes complicated.

  The present invention has been made in view of such problems, and a main object of the present invention is to provide a television that can reliably and easily perform channel switching and volume adjustment for the main screen and sub-screen when displaying two screens. To do.

  In order to achieve the above object, the television according to the present invention has a one-screen display process for displaying one channel of video on the display unit, and displays each video of two channels on the display unit as a main screen and a sub-screen, respectively. A control unit for executing screen display processing; and causing the control unit to perform channel switching and volume adjustment during execution of the one-screen display processing, and channel switching and volume for the main screen during execution of the two-screen display processing. A first operation unit for causing the control unit to perform adjustment, and a second operation unit for causing the control unit to perform at least one of channel switching and volume adjustment for the sub-screen when the two-screen display is performed. And an operation unit.

  The television includes a second operation unit for causing the control unit to execute at least one of channel switching and volume adjustment for the sub-screen when performing the two-screen display. For this reason, at the time of executing the two-screen display, it is possible to perform channel switching and volume adjustment for the sub-screen without using the first operation unit. Therefore, channel switching and volume adjustment for the main screen and the sub screen can be performed individually by operating the first operation unit and the second operation unit. Therefore, unlike a conventional television receiver in which it is determined whether the screen for channel switching is a main screen or a sub-screen based on the length of the key button operation time, when executing a two-screen display Channel switching and volume adjustment for the main screen and sub-screen can be reliably and easily performed.

  In the television according to the present invention, in the above television, the second operation unit includes a display stop switch for stopping display of the video on the sub-screen, and the control unit When the display stop switch is operated during the execution of the two-screen display, the display of the video for the sub-screen is stopped in a state where the sound for the sub-screen is output.

  In this television, when the display stop switch is operated at the time of executing the two-screen display, the control unit stops the display of the video for the sub-screen in a state where the sound for the sub-screen is output. For this reason, for example, a user views the video and the audio of the program while displaying the video of one channel (program) on one screen, and uses only the audio of the other channel (program) using headphones, for example. Therefore, it is possible to cope with usage patterns that other users listen to. Also in such a usage pattern, the first operation unit and the second operation unit perform channel switching and volume adjustment of a program to be displayed on one screen, and channel switching and volume adjustment of a program that listens to sound using headphones. Can be used individually.

  In addition, a television according to the present invention includes a main body in which the display unit is disposed in the above-described television, the second operation unit is configured separately from the main body, and the control unit includes The two-screen display process is executed when communication with the second operation unit is enabled.

  In this television, the control unit executes a two-screen display process when communication with the second operation unit becomes possible. For this reason, for example, the switching from the one-screen display to the two-screen display is performed only by making the second operation unit and the control unit communicable without performing the switching operation using the first operation unit. It can be carried out.

  In the television according to the present invention, the second operation unit is attached to a headphone or an earphone.

  In this television, the second operation unit is attached to headphones or earphones. For this reason, it is possible to reliably prevent the second operation unit from being lost.

  Hereinafter, the best mode of a television according to the present invention will be described with reference to the accompanying drawings. A television 1 shown in FIG. 1 is a rear projection television and includes a main body 2, a remote controller 3, headphones 4, and a remote controller 5. The main body 2 includes a display unit 11, a video display processing unit 12, a channel selection processing unit 13, tuners 14a and 14b (hereinafter also referred to as “tuner 14” when not distinguished), and video and audio processing units 15a and 15b (hereinafter referred to as distinction). If not, also referred to as “video / audio processing unit 15”, volume control unit 16, audio output units 17a, 17b (hereinafter also referred to as “audio output unit 17” if not distinguished), light receiving unit 18, terminals 19a, 19b (hereinafter referred to as “audio output unit 17”). When not distinguished from each other, it is also referred to as “terminal 19”).

  As shown in FIG. 1, the display unit 11 includes an optical engine 31 and a screen panel 32. The optical engine 31 is disposed inside the main body 2 and projects the projection light L modulated based on the display signal Se output from the video display processing unit 12 from the back side of the screen panel 32. Specifically, the optical engine 31 includes, for example, a light source, a light modulation element (for example, a digital micromirror device or a liquid crystal light valve), and a projection lens (both not shown). In the television 1, actually, the projection light L from the optical engine 31 is reflected by a reflection mirror (not shown) and projected onto the screen panel 32. As shown in FIG. 2, the screen panel 32 is disposed on the front side of the main body 2 and receives the projection light L to display an image.

  Under the control of the main control unit 21, the video display processing unit 12 is based on the video data Dp output from the video / audio processing unit 15a, for example, as shown in FIG. If not, it is also referred to as “TV image Pt”), and a display signal Se for displaying one screen on the screen panel 32 of the display unit 11 is generated and output to the optical engine 31. In addition, the video display processing unit 12 is based on the video data Dp and Dp output from the video / audio processing units 15a and 15b, respectively, under the control of the main control unit 21, for example, as shown in FIG. A display signal Se for displaying two screens on the screen panel 32 of the display unit 11 as a main screen and a sub-screen as Pt2 and Pt3 is generated and output to the optical engine 31. The channel selection processing unit 13 controls the tuners 14a and 14b and the video / audio processing units 15a and 15b by outputting a control signal Sc2 according to the control of the main control unit 21.

  The tuners 14a and 14b extract the broadcast signal Sb of the channel designated by the control signal Sc2 from the broadcast wave received by the antenna outside the figure in accordance with the control signal Sc2 output from the channel selection processing unit 13, and the video and audio The data are output to the processing units 15a and 15b, respectively. The video / audio processing unit 15 includes, for example, an IF circuit, an audio detection circuit, a video detection circuit, an A / D conversion unit (all not shown), and the like. In this case, the video / audio processing unit 15a generates video data Dp and audio data Ds based on the broadcast signal Sb output from the tuner 14a, and outputs them to the video display processing unit 12 and the audio output unit 17a. Also, the video / audio processing unit 15b generates video data Dp and audio data Ds based on the broadcast signal Sb output from the tuner 14b, and outputs them to the video display processing unit 12 and the audio output unit 17b.

  The volume adjusting unit 16 adjusts the volume (level) of the audio signal Ss output from the audio output units 17a and 17b by outputting the control signal Sc3 according to the control of the main control unit 21. The audio output unit 17a generates an audio signal Ss based on the audio data Ds output from the video / audio processing unit 15a and outputs the audio signal Ss to the speaker 20 (see FIGS. 1 and 2). The audio output unit 17b generates an audio signal Ss based on the audio data Ds output from the video / audio processing unit 15b and outputs the audio signal Ss to the terminal 19a (see FIGS. 1 and 2). In this case, the audio output units 17a and 17b output the audio signal Ss at a volume specified by the control signal Sc3 output from the volume adjustment unit 16. The light receiving unit 18 receives the infrared signal Si output from the remote controller 3 and photoelectrically converts the infrared signal Si to output an operation signal So1 indicating the operation content of the remote controller 3 to the main control unit 21. The terminals 19a and 19b are disposed on the front panel of the main body 2 as shown in FIG. In this case, the terminal 19 a is configured so that the plug 5 a of the remote controller 5 can be inserted, and outputs the audio signal Ss from the audio output unit 17 b to the headphones 4 via the plug 5 a and the remote controller 5. The terminal 19b is configured so that the plug 5b of the remote controller 5 can be inserted, and an operation signal So2 from the remote controller 5 is input via the plug 5b and output to the main control unit 21.

  The main control unit 21 corresponds to the control unit in the present invention, and receives the operation signal So1 output from the light receiving unit 18 and the operation signal So2 input through the terminal 19b, that is, the control signal Sc1 according to the operation of the remote controls 3 and 5. By outputting, the video display processing unit 12, the channel selection processing unit 13, and the volume adjusting unit 16 are controlled. The main control unit 21 also displays a single screen for displaying one television image Pt on the display unit 11 when the “single-screen display mode” is selected by operating the display mode changeover switch 44 (see FIG. 2) on the remote controller 3. Execute display processing. The main control unit 21 causes the display unit 11 to display the two television images Pt and Pt as the main screen and the sub screen, respectively, when the “two-screen display mode” is selected by operating the display mode changeover switch 44. Execute screen display processing.

  Further, the main control unit 21 detects whether or not the plug 5b of the remote controller 5 is inserted into the terminal 19b. In this case, the main control unit 21 executes “automatic display switching processing 70, 80 (see FIGS. 12 and 13), which will be described later, according to the detection result, thereby performing“ automatic operation ”by operating the display mode switching switch 44. In the state where the “switching mode” is selected, the one-screen display process and the two-screen display process are switched and executed. Further, the main control unit 21 performs channel switching and volume adjustment when executing the one-screen display process, and channel switching and volume adjustment for the main screen when executing the two-screen display process according to the operation of the remote controller 3. In addition, the main control unit 21 performs channel switching and volume adjustment for the sub screen during the execution of the two-screen display process according to the operation of the remote controller 5. Further, when the display stop switch 53 (see FIG. 2) of the remote controller 3 is operated during the execution of the two-screen display, the main control unit 21 maintains the output of the audio signal Ss to the terminal 19a while maintaining the output of the sub-screen. The display of the television image Pt is stopped.

  The remote controller 3 corresponds to the first operation unit in the present invention, and is configured separately from the main body unit 2 as shown in FIG. The remote controller 3 includes various switches such as a power switch 41, channel switches 42, 42,..., Volume adjustment switches 43a, 43b (hereinafter also referred to as “volume adjustment switch 43” when not distinguished), and a display mode changeover switch 44. When these are operated, the operation signal corresponding to each switch is converted into an infrared signal Si and output. In this case, the channel switches 42, 42,... Are used for channel switching when executing one-screen display, and are used for channel switching for the main screen when executing two-screen display. Further, the volume adjustment switch 43 is used for volume adjustment during execution of one-screen display, and is used for volume adjustment for the main screen during execution of two-screen display.

  The headphones 4 output sound based on the sound signal Ss input through the terminal 19a. The remote controller 5 corresponds to a second operation unit in the present invention, and is configured separately from the main unit 2 and connected to the headphones 4 via a cable as shown in FIG. ) The remote controller 5 includes channel switches 51a and 51b (hereinafter also referred to as “channel switch 51” when not distinguished), volume control switches 52a and 52b (hereinafter also referred to as “volume control switch 52” when not distinguished) and display stop. The switch 53 is provided, and when these are operated, an operation signal So2 corresponding to each switch is output to the main controller 21 via the plug 5b. Further, the remote controller 5 outputs the audio signal Ss input via the terminal 19a to the headphones 4.

  Next, the overall operation of the television 1 will be described with reference to the drawings. In the initial state, it is assumed that the plugs 5a and 5b of the remote controller 5 are not inserted into the terminals 19a and 19b. In the initial state, it is assumed that the single screen display mode is selected. In the television 1, when the power switch 41 of the remote controller 3 is operated, power is supplied to the optical engine 31 of the display unit 11 so that the light source emits light, and the main control unit 21 executes a one-screen display process. Specifically, the main control unit 21 outputs a control signal Sc1 for selecting a channel (for example, channel CH3) selected at the time of the previous power-off to the channel selection processing unit 13, and the TV image Pt of that channel. Is output to the video display processing unit 12. Further, the main control unit 21 outputs a control signal Sc1 for outputting the sound of the television image Pt at a volume level of, for example, “18” (see the volume level image Pv1 shown in FIG. 2) set when the power was turned off immediately before. Output to the volume adjustment unit 16. Next, the channel selection processing unit 13 outputs a control signal Sc2 to the tuner 14a and the video / audio processing unit 15a in accordance with the control signal Sc1. Next, the tuner 14a extracts the broadcast signal Sb of the channel CH3 according to the control signal Sc2, and the video / audio processing unit 15a outputs the video data Dp and the audio data Ds based on the broadcast signal Sb according to the control signal Sc2 to the video display processing unit 12 and Output to the audio output unit 17a.

  Subsequently, the video display processing unit 12 generates a display signal Se based on the video data Dp and outputs the display signal Se to the optical engine 31 of the display unit 11. In response to this, the optical engine 31 modulates the light from the light source into the projection light L based on the display signal Se and projects it onto the screen panel 32. Thereby, as shown in FIG. 2, the television image Pt1 of the channel CH3 is displayed on the screen panel 32 as one screen. On the other hand, the volume adjusting unit 16 outputs a control signal Sc3 for outputting the audio signal Ss at a volume level of “18” to the audio output unit 17a in accordance with the control signal Sc1 output from the main control unit 21. In response to this, the audio output unit 17a generates an audio signal Ss based on the audio data Ds from the video / audio processing unit 15a and outputs the audio signal Ss to the speaker 20. Thereby, the sound of the channel CH3 is output from the speaker 20 at the volume level of “18”.

  Next, for example, when the TV image Pt of the channel CH1 is displayed on one screen instead of the TV image Pt1, the channel switch 42 corresponding to the channel CH1 on the remote control 3 (the number “1” shown in FIG. 2 is added). The channel switch 42) is operated. At this time, the remote controller 3 outputs an infrared signal Si corresponding to the channel switch 42, and the light receiving unit 18 receives the infrared signal Si and outputs an operation signal So1. Next, the main control unit 21 outputs a control signal Sc1 for selecting the channel CH1 to the channel selection processing unit 13 according to the operation signal So1, and also displays a control signal Sc1 for displaying the TV image Pt of the channel CH1 on one screen. Output to the processing unit 12. Further, the main control unit 21 outputs a control signal Sc1 for outputting the sound of the television image Pt of the channel CH1 at the volume level of “18” to the volume adjustment unit 16. Subsequently, the video display processing unit 12, the channel selection processing unit 13, the tuner 14a, the video / audio processing unit 15a, the volume adjustment unit 16, the audio output unit 17a, and the optical engine 31 operate in the same manner as described above, so that FIG. As shown in the figure, the TV image Pt2 of the channel CH1 is displayed on one screen on the screen panel 32, and the sound of the channel CH1 is output from the speaker 20 at a volume level of “18” (see the volume level image Pv2 shown in the figure). ).

  Next, when the volume level of the channel CH1 is increased from “18” to “20”, the volume adjustment switch 43a of the remote controller 3 is operated. At this time, the main control unit 21 outputs a control signal Sc1 for outputting sound at a volume level of “20” to the volume adjustment unit 16 according to the operation signal So1, and the volume adjustment unit 16 controls the control signal Sc3 according to the control signal Sc1. Is output. In response to this, the audio output unit 17a outputs an audio signal Ss based on the audio data Ds from the video / audio processing unit 15a at a volume level of “20”. Thereby, the sound of the channel CH1 is output at the volume level of “20” (see the volume level image Pv3 shown in FIG. 4).

  Next, for example, when the TV image Pt2 of the channel CH1 being displayed is the main screen and the TV image Pt of the channel CH6 is the subscreen and the two TV images Pt and Pt are displayed on the two screens, the display mode selector switch 44 of the remote controller 3 is set. After operating to select “two-screen display mode”, the channel switch 42 corresponding to the channel CH6 (the channel switch 42 with the numeral “6” shown in FIG. 2) is operated. At this time, the main control unit 21 executes a two-screen display process according to the operation signal So1. In this case, the main control unit 21 outputs a control signal Sc1 for selecting the channels CH1 and CH6 to the channel selection processing unit 13, and also displays a control signal Sc1 for displaying the TV images Pt and Pt of the channels CH1 and CH6 on two screens. Is output to the video display processing unit 12. Further, the main control unit 21 outputs a control signal Sc1 for outputting each sound of the channels CH1 and CH6 at the currently selected volume level of “20” to the volume adjustment unit 16. Subsequently, the channel selection processing unit 13 outputs the control signal Sc2 to the tuners 14a and 14b and the video / audio processing units 15a and 15b according to the control signal Sc1.

  In response to this, the tuner 14a extracts the broadcast signal Sb of the channel CH1, and the video / audio processing unit 15a sends the video data Dp and the audio data Ds based on the broadcast signal Sb to the video display processing unit 12 and the audio output unit 17a, respectively. Output. The tuner 14b extracts the broadcast signal Sb of the channel CH6, and the video / audio processing unit 15b outputs the video data Dp and the audio data Ds based on the broadcast signal Sb to the video display processing unit 12 and the audio output unit 17b, respectively. Next, the video display processing unit 12 generates a display signal Se for two-screen display based on the video data Dp and Dp output from the video / audio processing units 15 a and 15 b, and outputs them to the optical engine 31. In this case, the video display processing unit 12 generates the display signal Se so that the frame image Pf (see FIG. 5) indicating that the TV video Pt of the channel CH1 is the main screen can be displayed. Subsequently, when the optical engine 31 projects the projection light L based on the display signal Se, the TV image Pt2 of the channel CH1 and the TV image Pt3 of the channel CH6 are displayed on the screen panel 32 as shown in FIG. The frame image Pf is displayed around the television image Pt2.

  On the other hand, the volume adjusting unit 16 outputs the control signal Sc3 to the sound output units 17a and 17b according to the control signal Sc1. In response to this, the audio output unit 17a outputs the audio signal Ss based on the audio data Ds from the video / audio processing unit 15a to the speaker 20 at a volume level of “20”. Thereby, the sound of the channel CH1 is output from the speaker 20 at the volume level of “20” (see the volume level image Pv4 shown in FIG. 5). The audio output unit 17b outputs the audio signal Ss based on the audio data Ds from the video / audio processing unit 15b to the terminal 19a at a volume level of “20”. In this case, as shown in FIG. 2, by connecting the plugs 5a and 5b of the remote controller 5 to the terminals 19a and 19b, respectively, the volume level of the channel CH6 is “20” (see volume level image Pv5 shown in FIG. 5). ) Is output from the headphones 4.

  Next, in order to display the TV image Pt of another channel as the main screen instead of the TV image Pt2 of the channel CH1 being displayed, the channel switch 42 of the remote controller 3 is operated. In this case, when the operation signal So1 corresponding to the channel switch 42 is output during execution of the two-screen display process, the main control unit 21 determines that the channel switching for the main screen has been instructed. Therefore, for example, when the channel switch 42 corresponding to the channel CH2 (the channel switch 42 with the numeral “2” shown in FIG. 2) is operated, the main control unit 21 replaces the channel CH1 with the channel CH2. The control signal Sc1 for selecting the channel is output to the channel selection processing unit 13. Further, the main control unit 21 outputs a control signal Sc1 for outputting the audio signal Ss at a volume level of “20” currently selected for the main screen to the volume adjustment unit 16.

  Next, the video display processing unit 12, the channel selection processing unit 13, the tuner 14a, the video / audio processing unit 15a, the volume adjustment unit 16, the audio output unit 17a, and the optical engine 31 operate in the same manner as described above, and are shown in FIG. Thus, instead of the television image Pt2, the television image Pt4 of the channel CH2 is displayed as the main screen. Further, the sound of the channel CH2 is output from the speaker 20 at the same volume level of “20” (see the volume level image Pv6 shown in the figure) before the operation of the channel switch 42. Hereinafter, every time the channel switch 42 is operated in the execution state of the two-screen display, the main control unit 21 executes the same processing as described above. Thereby, channel switching for the main screen is performed in accordance with the operation of the channel switch 42.

  On the other hand, when changing the volume level of the main screen, the volume adjustment switch 43 of the remote controller 3 is operated. In this case, when the operation signal So1 corresponding to the volume adjustment switch 43 is output during execution of the two-screen display process, the main control unit 21 determines that an instruction to increase or decrease the volume for the main screen has been issued. Therefore, for example, when the volume adjustment switch 43a is operated, the main control unit 21 increases the volume of the main screen and outputs the control signal Sc1 to be output at a volume level of, for example, “24” to the volume adjustment unit 16. To do. Next, the volume adjusting unit 16 and the audio output units 17a and 17b operate in the same manner as described above, so that the audio of the channel CH2 is output from the speaker 20 at the volume level of “24” (see the volume level image Pv7 shown in FIG. 7). The sound of the channel CH6 is output from the headphones 4 at the same volume level of “20” as before the operation of the volume adjustment switch 43a. Hereinafter, every time the volume adjustment switch 43 is operated in the execution state of the two-screen display, the main control unit 21 executes the same process as described above. As a result, the volume of the main screen is adjusted according to the operation of the volume adjustment switch 43.

  Next, in order to display the TV image Pt of another channel as a sub-screen instead of the TV image Pt3 of the channel CH6 being displayed, the channel switch 51 of the remote controller 5 is operated. Next, the main control unit 21 specifies the operated switch based on the operation signal So2 from the remote controller 5, and performs a sub-screen control process 60 (see FIG. 8) for performing various processes on the sub-screen according to the switch. Execute. At this time, since the operation signal So2 corresponding to the channel switch 51 is output from the remote controller 5, the main control unit 21 determines that the channel switch 51 has been operated (step 61), and the sub-screen according to the operation signal So2. The channel switching process is executed (step 62). In this case, when the operation signal So2 corresponding to the channel switch 51a is output during the execution of the two-screen display process, the main control unit 21 determines that an instruction to increase the channel for the sub-screen has been issued, and the channel When the operation signal So2 corresponding to the switch 51b is output, it is determined that an instruction to lower the channel for the sub-screen has been issued. Therefore, for example, when the channel switch 51a is operated once, the main control unit 21 outputs a control signal Sc1 for selecting the channel CH7 to the channel selection processing unit 13 instead of the channel CH6. Further, the main control unit 21 outputs a control signal Sc1 for outputting the audio signal Ss at the volume level of “20” currently selected for the sub screen to the volume adjustment unit 16.

  Next, the video display processing unit 12, the channel selection processing unit 13, the tuner 14b, the video / audio processing unit 15b, the volume adjustment unit 16, the audio output unit 17b, and the optical engine 31 operate in the same manner as described above, and are shown in FIG. Thus, instead of the television image Pt3, the television image Pt5 of the channel CH7 is displayed as a sub-screen. Further, the sound of the channel CH2 is output from the speaker 20 at the same volume level (24) as that before the operation of the channel switch 51a (refer to the volume level image Pv7 shown in the figure), and the sound of the channel CH7 is output from the channel switch 51a. It is output from the headphones 4 at the same volume level “20” as before the operation (see volume level image Pv8 shown in the figure). Hereinafter, every time the channel switch 51 is operated in the execution state of the two-screen display, the main control unit 21 executes the same channel switching process as described above. As a result, the channel of the sub screen is switched according to the operation of the channel switch 51.

  On the other hand, when changing the volume level for the sub-screen, the volume adjustment switch 52 of the remote controller 5 is operated. Next, the main control unit 21 executes the sub-screen control process 60 based on the operation signal So2 from the remote controller 5. At this time, since the operation signal So2 corresponding to the volume adjustment switch 52 is output from the remote controller 5, the main control unit 21 determines that the volume adjustment switch 52 has been operated (step 63), and sub-commands according to the operation signal So2. Volume adjustment processing for the screen is executed (step 64). In this case, when the operation signal So2 corresponding to the volume adjustment switch 52a is output during execution of the two-screen display process, the main control unit 21 determines that an instruction to increase the volume for the sub-screen has been issued. When the operation signal So2 corresponding to the volume adjustment switch 52b is output, it is determined that an instruction to decrease the volume for the sub-screen has been issued. Therefore, for example, when the volume adjustment switch 52b is operated, the main control unit 21 decreases the volume of the sub-screen and outputs the control signal Sc1 to be output at a volume level of “18” to the volume adjustment unit 16, for example. To do. Next, the volume adjustment unit 16 and the audio output units 17a and 17b operate in the same manner as described above, so that the sound of the channel CH2 is output from the speaker 20 at the same volume level of “24” as before the operation of the volume adjustment switch 52b. Then, the sound of the channel CH7 is output from the headphones 4 at the volume level of “18” (see the volume level image Pv9 shown in FIG. 10). Hereinafter, every time the volume adjustment switch 52 is operated in the execution state of the two-screen display, the main control unit 21 executes the same volume adjustment process as described above. As a result, the volume of the sub-screen is adjusted according to the operation of the volume adjustment switch 52.

  Next, in a state where the audio for the sub-screen is output, the display of the TV video Pt as the sub-screen (in this case, the TV video Pt5 of channel CH7) is stopped, that is, the audio for the sub-screen is output. In order to display one screen of the television image Pt (in this case, the television image Pt4 of the channel CH2) for the main screen, the display stop switch 53 of the remote controller 5 is operated. Next, the main control unit 21 executes the sub-screen control process 60 based on the operation signal So2 from the remote controller 5. At this time, since the operation signal So2 corresponding to the display stop switch 53 is output from the remote controller 5, the main control unit 21 determines that the display stop switch 53 has been operated (step 65), and sub-commands according to the operation signal So2. A display stop process of the television video Pt as a screen, that is, a switching process from the two-screen display to the one-screen display is executed (step 66). In this case, the main control unit 21 outputs a control signal Sc1 for stopping the display of only the TV video Pt of the channel CH7 to the channel selection processing unit 13 while maintaining the audio output of the channels CH2 and CH7, and also the TV video of the CH2. A control signal Sc1 for displaying one screen of Pt is output to the video display processing unit 12. Next, the channel selection processing unit 13 outputs a control signal Sc2 according to the control signal Sc1. In response to this, the output of the video data Dp is stopped while the audio / video processing unit 15b maintains the output of the audio data Ds. Subsequently, when the video display processing unit 12 outputs the display signal Se based on the video data Dp from the video / audio processing unit 15a, the TV video Pt4 of the channel CH2 is displayed on the screen panel 32 as shown in FIG. Displayed on the screen.

  Further, the volume adjusting unit 16 and the audio output units 17a and 17b operate in the same manner as described above, so that the audio of the channel CH2 has the same “24” volume level as that before the operation of the display stop switch 53 (the volume shown in FIG. 11). Is output from the speaker 20 at the level image Pv10), and the sound of the channel CH7 is output from the headphone 4 at the same volume level of “18” (see the volume level image Pv11 shown in the figure) before the operation of the display stop switch 53. The In this case, in this state, when the volume adjustment switch 52 of the remote controller 5 is operated, the main control unit 21 executes a volume adjustment process similar to the above. In this state, when the channel switch 51 of the remote controller 5 is operated, the main control unit 21 executes the same channel switching process as described above. For this reason, a user views the TV video Pt and the audio of the program while the TV video Pt of the program of one channel is displayed on one screen, and uses the headphones 4 only for the audio of the program of the other channel. In a usage pattern that other users listen to, each user can operate the remote control 3 and the remote control 5 respectively, so that each user can arbitrarily perform channel switching and volume adjustment.

  On the other hand, while the one-screen display process described above is being executed, the plug 5b of the remote controller 5 is inserted into the terminal 19b as shown in FIG. 2 in the state where the “automatic switching mode” is selected by operating the display mode changeover switch 44. When the remote controller 5 and the main control unit 21 are in a communicable state, the main control unit 21 sends to the terminal 19b based on a detection signal from an electrical detection circuit or a mechanical detection unit (both not shown). The insertion of the plug 5b is detected, and the display switching process 70 shown in FIG. 12 is executed. In the display switching process 70, the main control unit 21 determines whether or not the current mode is the automatic switching mode (step 71). At this time, when it is determined that the current mode is the automatic switching mode, the main control unit 21 executes the above-described two-screen display process (step 72). In this case, the main control unit 21 sets the TV image Pt of the channel selected at the time of executing the one-screen display process as the main screen, and the TV image of the channel selected as the sub-screen at the time of executing the immediately preceding two-screen display process. Both TV images Pt and Pt are displayed on two screens with Pt as a sub-screen. Next, the main control unit 21 starts communication with the remote controller 5 (step 73). On the other hand, when it is determined in step 71 that the current mode is not the automatic switching mode, the main control unit 21 executes step 73 without executing step 72.

  Further, when the plug 5b is removed from the terminal 19b in the state where the “automatic switching mode” is selected during the execution of the two-screen display process, the main control unit 21 detects the removal, and the display switching shown in FIG. Process 80 is executed. In the display switching process 80, the main control unit 21 determines whether or not the current mode is the automatic switching mode (step 81). At this time, if it is determined that the current mode is the automatic switching mode, the main control unit 21 executes the above-described one-screen display process (step 82) and then ends the communication with the remote controller 5 (step 83). ). On the other hand, when it is determined in step 81 that the current mode is not the automatic switching mode, the main control unit 21 executes step 83 without executing step 82. That is, the main control unit 21 executes the display switching processes 70 and 80 described above, and in the state where the “automatic switching mode” is selected, the main control unit 21 performs one screen according to the detection result of the insertion and removal of the plug 5b. The display process and the two-screen display process are switched and executed. For this reason, it is possible to switch between the one-screen display and the two-screen display only by inserting and removing the plug 5b without operating the remote controller 3. Note that the configuration for detecting the state in which the remote controller 5 and the main control unit 21 can communicate is not limited to the above configuration. For example, the main control unit 21 periodically detects the load impedance on the terminal 19b side, It can be detected that communication is possible when the impedance is reduced from an infinite state to a predetermined impedance, and various configurations can be employed as appropriate.

  As described above, according to the television 1, since the remote controller 5 is provided for causing the main control unit 21 to perform channel switching and volume adjustment for the sub-screen when the two-screen display is performed, the two-screen display is performed. In some cases, channel switching and volume adjustment can be performed for the sub-screen without using the remote controller 3. Therefore, channel switching and volume adjustment for the main screen and sub-screen can be performed individually by operating the remote controllers 3 and 5 separately. Therefore, unlike a conventional television receiver in which it is determined whether the screen for channel switching is a main screen or a sub-screen based on the length of the key button operation time, when executing a two-screen display Channel switching and volume adjustment for the main screen and sub-screen can be performed reliably and easily.

  Further, when the display stop switch 53 of the remote controller 5 is operated at the time of executing the two-screen display, the main control unit 21 displays the TV video Pt on the sub screen in a state where the sound about the sub screen is output. By stopping, for example, a user views the television image Pt and the audio of the program while displaying the television image Pt of the program of one channel on one screen, and only the audio of the program of the other channel is displayed. It is possible to deal with usage patterns that other users listen to using the headphones 4. Also in such a usage mode, channel switching and volume adjustment of a program to be displayed on one screen and channel switching and volume adjustment of a program that listens to sound using headphones 4 are individually performed using separate remote controllers 3 and 5. Can be done automatically.

  In addition, when the plug 5b of the remote controller 5 is inserted into the terminal 19b and the remote controller 5 and the main control unit 21 are in a communicable state, the main control unit 21 executes a two-screen display process, whereby the remote control Without using 3, it is possible to switch from the single-screen display to the two-screen display simply by inserting the plug 5b into the terminal 19b. Further, since the remote controller 5 is attached to the headphones 4, it is possible to reliably prevent the remote controller 5 from being lost.

  In addition, this invention is not limited to said structure. For example, although an example of performing both channel switching and volume adjustment for the sub screen using the remote controller 5 has been described above, a configuration in which only one of these is performed using the remote controller 5 may be employed. In addition to channel switching and volume adjustment, for example, a configuration in which an operation for switching a video to be displayed as a sub-screen to a video from an external device or the like is performed using the remote controller 5 may be employed. Moreover, although the example which transmits / receives the operation signal So2 and the audio | voice signal Ss via plug 5a, 5b and a cable was mentioned above, the structure which transmits / receives these signals by radio | wireless communication is also employable. In this case, for example, when the power switch for the remote controller 5 is provided in the remote controller 5 and the power switch is operated and the main controller 21 and the remote controller 5 can communicate with each other, the main controller 21 has two screens. A configuration for executing display processing may also be employed. In addition, although the example in which the remote controller 5 is attached to the headphones 4 has been described above, the headphones 4 and the remote controller 5 can be configured separately.

  Further, the present invention can also be applied to a receiving device that does not include a display unit. In addition, the example in which the display unit 11 is configured by including the optical engine 31 and the screen panel 32 has been described above. However, a CRT, a liquid crystal display panel, and a plasma display may be employed as the display unit. Moreover, although the example provided with the headphones 4 has been described above, an earphone can be adopted instead of the headphones 4 and the remote controller 5 can be attached to the earphone.

1 is a block diagram illustrating a configuration of a television 1. FIG. 1 is a front view of a television 1. FIG. It is a display screen figure of television image | video Pt2. It is a display screen figure when the volume level of channel CH1 is increased. It is a display screen figure when television picture Pt2 and Pt3 are displayed on 2 screens. It is a display screen figure when television picture Pt3 and Pt4 are displayed on 2 screens. It is a display screen figure when the volume level of channel CH2 is increased. 5 is a flowchart of sub-screen control processing 60. It is a display screen figure when television picture Pt4 and Pt5 are displayed on 2 screens. It is a display screen figure when the volume level of channel CH7 is decreased. It is a display screen figure when the television image | video Pt4 is displayed on 1 screen. 5 is a flowchart of a display switching process 70. 10 is a flowchart of a display switching process 80.

Explanation of symbols

  1 TV, 3, 5 remote control, 4 headphones, 11 display unit, 21 main control unit, 53 display stop switch, CH1-CH3, CH6, CH7 channels, Pt1-Pt5 TV image

Claims (4)

  A control unit that executes a one-screen display process for displaying one channel image on the display unit, and a two-screen display process for displaying each image of the two channels as a main screen and a sub-screen on the display unit; A first switch for causing the control unit to perform channel switching and volume adjustment at the time of execution of display processing, and for causing the control unit to perform channel switching and volume adjustment of the main screen at the time of execution of the two-screen display processing. A television comprising: an operation unit; and a second operation unit for causing the control unit to execute at least one of channel switching and volume adjustment for the sub-screen when the two-screen display is performed. The second operation unit includes a display stop switch for stopping display of the video for the sub-screen,
The control unit stops display of video on the sub-screen in a state in which sound is output on the sub-screen when the display stop switch is operated during execution of the two-screen display. The listed TV. A main body portion on which the display portion is disposed;
The second operation unit is configured separately from the main body unit,
The television according to claim 1, wherein the control unit executes the two-screen display process when communication with the second operation unit is enabled.   The television according to claim 3, wherein the second operation unit is attached to a headphone or an earphone.

Images