JP2007053619A - Electronic apparatus, control method thereof, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic apparatus quickly controlling a device. <P>SOLUTION: The apparatus includes a slave microcontroller 19 for controlling a panel control IC 20, a master microcontroller 15 for managing a power source and controlling the slave microcontroller 19, and a UART switch 21 for switching a connection destination of the panel control IC 20 to the slave microcontroller 19 or the master microcontroller 15. Furthermore, the master microcontroller 15 connects the panel control IC 20 and the master microcontroller 15 by controlling the UART switch 21, to control the panel control IC 20. This invention is applicable to, for example, a TV receiver. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic device, a control method therefor, and a program, and more particularly, to an electronic device that can quickly control a device, a control method therefor, and a program.

  At present, television receivers that process video signals in a digital manner have become mainstream, and the types of television receivers are increasing. For example, the display may be a CRT, plasma panel, or liquid crystal panel television receiver, an integrated television receiver in which the receiver body and the display are in the same housing, or the receiver body and the display in separate housings. There is a television receiver with a separate body.

  Thus, as the types of television receivers increase, the configuration (hardware) becomes complicated (complex).

  On the other hand, in the field where television receivers are developed, shortening of the design period and cost reduction are required, and in order to realize these requirements, common design and diversion design are performed, and hardware Packaging for each function is being promoted rapidly. For example, one of the flow of packaging is to perform control required for a television receiver by using a plurality of microcontrollers in which control (contents) are divided for each function.

  As one of a plurality of microcontrollers that control a television receiver, for example, in order to manage a power supply, receive an operation from a user, and execute a process according to the operation, There is a master microcontroller that controls a controller, and another example is a slave microcontroller that controls devices such as a control IC (Integrated Circuit) for controlling a panel as a display.

  For example, the master microcontroller controls the slave microcontroller according to the operation from the user, and the slave microcontroller controls the control IC for controlling the panel according to the control from the master microcontroller.

  Further, as described above, a television receiver having a master microcontroller for managing power supply and a slave microcontroller controlled by the master microcontroller has all the blocks of the television receiver as its operation mode. In addition, there are a normal mode in which power from the power source is supplied and a low power consumption mode in which power from the power source is supplied to only the minimum necessary blocks.

  In the normal mode, power from the power source is supplied to all blocks of the television receiver including the master microcontroller and the slave microcontroller. In the low power consumption mode, power from the power source is supplied to only the minimum necessary blocks including the master microcontroller.

  Here, the slave microcontroller is generally not included in the minimum necessary blocks. Therefore, in the low power consumption mode, power from the power source is not supplied to the slave microcontroller.

  In addition, when the power of the television receiver is completely turned off (for example, when the television receiver is unplugged from the outlet), the television receiver including the master microcontroller and the slave microcontroller is connected. The supply of power to all blocks is stopped.

A function for realizing the low power consumption mode by providing a register for storing the transition setting to the low power consumption mode for the components in the graphic controller and setting means for performing the transition setting to the low power consumption mode in the register. An information processing apparatus capable of realizing control for suppressing power consumption in a graphic controller that does not include the above is disclosed (for example, see Patent Document 1).
JP 2002-236529 A

  By the way, in a television receiver configured such that the master microcontroller controls the slave microcontroller and the slave microcontroller controls the control IC for controlling the panel, for example, the slave microcontroller is supplied with power from the power source. When the slave microcontroller is not in an operable state, such as when it is in a low power consumption mode where no power is being supplied, to control the panel until the slave microcontroller is in an operable state A device that is controlled by a slave microcontroller, such as a control IC, cannot be controlled. Therefore, it takes time to control the device.

  The present invention has been made in view of such a situation, and makes it possible to quickly control a device.

  One aspect of the present invention provides a first control unit that controls a device, a second control unit that controls the first control unit, and a connection destination of the device. 1 control means or a switching means for switching to the second control means, and the second control means further controls the switching means to switch the device and the second control means. It is an electronic device that also connects and controls the device.

  In addition, according to one aspect of the present invention, a first control unit that controls a device, a second control unit that performs power source management and controls the first control unit, and a connection destination of the device, In a method for controlling an electronic device comprising the first control means or a switching means for switching to the second control means, the second control means controls the switching means to control the device and the first control means. It is also a control method including a step of controlling the device by connecting two control means.

  In addition, according to one aspect of the present invention, a first control unit that controls a device, a second control unit that performs power source management and controls the first control unit, and a connection destination of the device, In a program to be executed by a computer built in the second control unit of the electronic device including the first control unit or the switching unit that switches to the second control unit, by controlling the switching unit, It is also a program that causes a computer to execute processing including a step of controlling a device by connecting the device and the second control means.

  In one aspect of the present invention, the first control unit controls the device, and the second control unit manages the power source and controls the first control unit. In addition, the switching unit switches the device connection destination to the first control unit or the second control unit. Then, the switching means is controlled by the second control means, whereby the device and the second control means are connected and the device is controlled.

  According to one aspect of the present invention, device control can be performed quickly.

  Embodiments of the present invention will be described below. Correspondences between the configuration requirements of the present invention and the embodiments described in the detailed description of the present invention are exemplified as follows. This description is to confirm that the embodiments supporting the present invention are described in the detailed description of the invention. Accordingly, although there are embodiments that are described in the detailed description of the invention but are not described here as embodiments corresponding to the constituent elements of the present invention, It does not mean that the embodiment does not correspond to the configuration requirements. Conversely, even if an embodiment is described here as corresponding to a configuration requirement, that means that the embodiment does not correspond to a configuration requirement other than the configuration requirement. It's not something to do.

An electronic device according to one aspect of the present invention is provided.
A first control means (for example, the slave microcontroller 19 of FIG. 1) for controlling a device (for example, the panel control IC 20 of FIG. 1);
A second control means (for example, the master microcontroller 15 in FIG. 1) for managing the power supply and controlling the first control means;
Switching means (for example, the UART switch 21 in FIG. 1) for switching the connection destination of the device to the first control means or the second control means,
The second control means further controls the device by connecting the device and the second control means by controlling the switching means.

An electronic device control method according to an aspect of the present invention includes:
First control means for controlling the device;
A second control means for performing power management and controlling the first control means;
In a method for controlling an electronic device comprising: a switching unit that switches a connection destination of the device to the first control unit or the second control unit.
The second control unit includes a step of controlling the device by connecting the device and the second control unit by controlling the switching unit (for example, step S15 in FIG. 2). .

A program according to one aspect of the present invention includes:
First control means for controlling the device;
A second control means for performing power management and controlling the first control means;
In a program to be executed by a computer built in the second control means of an electronic device comprising: a switching means for switching the connection destination of the device to the first control means or the second control means;
Controlling the device by connecting the device and the second control unit by controlling the switching unit (for example, step S15 in FIG. 2).

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration example of an embodiment of a television receiver to which the present invention is applied.

  The television receiver 10 has, as its operation mode, a normal mode that operates with predetermined power consumption and a low power consumption mode that operates with power consumption equal to or lower than the predetermined power consumption.

  When the operation mode of the television receiver 10 is the normal mode, power is supplied to each block constituting the television receiver 10, and the television receiver 10 receives broadcast radio waves from a broadcasting station and displays video. indicate. Further, when the operation mode of the television receiver 10 is the low power consumption mode, power is supplied only to a part of the blocks constituting the television receiver 10, and the television receiver 10 suppresses power consumption. .

  Here, of the blocks constituting the television receiver 10, the key input unit 13, the light receiving unit 14, the master microcontroller 15, the panel control IC 20, and the LCD (Liquid Crystal Display) panel 32 include the television receiver 10. The power is supplied regardless of whether the operation mode is the normal mode or the low power consumption mode. Hereinafter, these blocks are appropriately referred to as a first power supply block group.

  On the other hand, among the blocks constituting the television receiver 10, the slave microcontroller 19, the main tuner 26M, the sub tuner 26S, the input switching unit 28, the main video signal processing unit 29M, the sub video signal processing unit 29S, and the multi-screen generation IC 30 The video processor (VP) 31, the audio processor (AP) 33, and the amplifier 34 are supplied with power when the operation mode of the television receiver 10 is the normal mode. Hereinafter, these blocks are appropriately referred to as a second power supply block group.

  The power supply unit 11 directly supplies power to the first power supply block group, and supplies power to the second power supply block group via the power supply relay 12 that operates according to control from the master microcontroller 15. In FIG. 1, illustration of a line indicating that the power supply unit 11 supplies power to each block constituting the television receiver 10 is omitted.

  The power supply relay 12 closes the contact and supplies the power from the power supply unit 11 to the second power supply block group when the operation mode of the television receiver 10 is the normal mode according to the control from the master microcontroller 15. When the operation mode of the television receiver 10 is the low power consumption mode, the contact is opened (opened), and the supply of power from the power supply unit 11 to the second power supply block group is stopped.

  The key input unit 13 includes, for example, a plurality of keys (switch buttons). The key input unit 13 receives an operation of selecting a desired channel by the user and supplies an operation signal corresponding to the operation of the user to the master microcontroller 15. . Further, the key input unit 13 is operated when a normal mode request key operated when the operation mode of the television receiver 10 is set to the normal mode, or when the operation mode of the television receiver 10 is set at the low power consumption mode. A low power consumption mode request key.

  The light receiving unit 14 receives (receives) a radio signal (for example, infrared rays) from a remote commander (not shown) and supplies the received signal to the master microcontroller 15. For example, when the user operates the remote commander, the remote commander wirelessly transmits an operation signal corresponding to the operation, and the light receiving unit 14 receives the operation signal transmitted by the remote commander, and the master microcontroller 15 To supply. The remote commander includes a normal mode request key and a low power consumption mode request key, similar to the key input unit 13.

  The master microcontroller 15 includes a CPU (Central Processing Unit) 15A and a memory 15B. The CPU 15A reads out and executes a program from the nonvolatile memory 16 to perform various processes. That is, the master microcontroller 15 controls the power relay 12, the slave microcontroller 19, the panel control IC 20, the UART (Universal Asynchronous Receiver Transmitter) switch 21, and the like.

  Specifically, for example, the master microcontroller 15 manages the power supply unit 11 (supply of power from the power supply unit 11) by controlling the power supply relay 12.

  Further, the master microcontroller 15 connects the UART so that the slave microcontroller 19 and the panel control IC 20 are connected via the UART line 22 or so that the master microcontroller 15 and the panel control IC 20 are connected. The switch 21 is controlled.

  Further, the master microcontroller 15 controls the slave microcontroller 19 via the IIC bus 18, thereby allowing the slave microcontroller 19 to have an input switching unit 28, a main video signal processing unit 29 </ b> M, a sub video signal processing unit 29 </ b> S, The multi-screen generation IC 30, the video processor 31, the audio processor 33, and the like are controlled. Further, the master microcontroller 15 controls the main tuner 26M and the sub tuner 26S that select (select) the broadcast radio wave from a predetermined broadcast station, for example, according to the operation of the key input unit 13 by the user.

  Further, the master microcontroller 15 controls the panel control IC 20 via the UART switch 21 and the UART line 22 when the operation mode of the television receiver 10 is the low power consumption mode.

  The nonvolatile memory 16 is connected to the master microcontroller 15 via the IIC bus 17 and stores information and programs necessary for various controls by the master microcontroller 15.

  The IIC buses 17 and 18 are buses for performing high-speed communication (for example, 100 Kbps, 400 Kbps, or 3.4 Mbps) between devices arranged at a short distance such as in the same board. The master microcontroller 15 and the nonvolatile memory 16 are connected, and the master microcontroller 15 and the slave microcontroller 19 are connected by the IIC bus 18.

  The slave microcontroller 19 includes a CPU 19A, a memory 19B, and the like. The CPU 19A reads out and executes a program from the nonvolatile memory 23, and performs various processes. The slave microcontroller 19 also reads information necessary for various controls from the nonvolatile memory 23, and via the IIC bus 24, the input switching unit 28, the main video signal processing unit 29M, the sub video signal processing unit 29S, The screen generation IC 30, the video processor 31, and the audio processor 33 are controlled.

  Furthermore, when the operation mode of the television receiver 10 is the normal mode, the slave microcontroller 19 provides the image quality of the video displayed on the LCD panel 32 to the panel control IC 20 via the UART switch 21 and the UART line 22. The panel control IC 20 is controlled by transmitting data for adjustment.

  The panel control IC 20 controls the LCD panel 32 so that a video for mute is displayed (muted) on the LCD panel 32 according to the control from the master microcontroller 15 or the slave microcontroller 19. In addition, the panel control IC 20 controls the LCD panel 32 so that the video supplied from the video processor 31 is displayed on the LCD panel 32 (the mute is released) according to the control from the slave microcontroller 19. When the panel control IC 20 controls the LCD panel 32 so as to perform mute, the LCD panel 32 displays, for example, a mute black screen and prevents a distorted image from being displayed.

  The panel control IC 20 adjusts the image quality of the video displayed on the LCD panel 32. For example, the panel control IC 20 controls a backlight (not shown) provided in the LCD panel 32 and the like, thereby controlling the brightness and contrast of the image displayed on the LCD panel 32. Further, the panel control IC 20 controls the turning on and off of an LED (Light Emitting Diode) (not shown), for example, representing a power supply state and an operation mode provided in the LCD panel 32.

  The UART switch 21 switches the connection destination of the panel control IC 20 via the UART line 22 to either the master microcontroller 15 or the slave microcontroller 19 in accordance with control from the master microcontroller 15.

  In the UART switch 21, when the connection destination of the panel control IC 20 is switched to the master microcontroller 15, the panel control IC 20 is controlled by the master microcontroller 15. In the UART switch 21, when the connection destination of the panel control IC 20 is switched to the slave microcontroller 19, the panel control IC 20 is controlled by the slave microcontroller 19.

  The UART line 22 is a communication line that connects the UART switch 21 and the panel control IC 20. Here, the master microcontroller 15, the slave microcontroller 19, and the panel control IC 20 have a built-in UART communication interface (not shown). The UART is a simpler communication interface than the IIC bus that can transmit data and clock on one line and uses two lines for data and clock transmission.

  The nonvolatile memory 23 is connected to the IIC bus 24, and stores information and programs necessary for various controls by the slave microcontroller 19, for example.

  The IIC bus 24 includes the slave microcontroller 19, the nonvolatile memory 23, the input switching unit 28, the main video signal processing unit 29M, the sub video signal processing unit 29S, the multi-screen generation IC 30, the video processor 31, or the audio processor 33. And connected.

  The U / V antenna 25 receives a television broadcast radio wave broadcast as a broadcast radio wave from a broadcast station (not shown), and supplies an RF (radio frequency) signal based on the broadcast radio wave to the main tuner 26M and the sub tuner 26S. .

  The main tuner 26M selects (selects) a broadcast radio wave from a predetermined broadcast station according to control from the master microcontroller 15 and demodulates an RF signal based on the broadcast radio wave supplied from the U / V antenna 25. The main tuner 26M supplies a composite video signal and an audio signal obtained by demodulating the RF signal to the input switching unit 28. The video based on the composite video signal demodulated by the main tuner 26M is displayed on the main screen of the LCD panel 32 (the entire screen of the LCD panel 32).

  Similarly to the main tuner 26M, the sub tuner 26S demodulates the RF signal from the U / V antenna 25 and supplies the resultant composite video signal and audio signal to the input switching unit 28. The video based on the composite video signal demodulated by the sub tuner 26S is displayed on the sub screen of the LCD panel 32 (a part of the screen of the LCD panel 32).

  The external video input terminal 27 is an interface such as a so-called pin input connection terminal, is connected to an external device (not shown), and supplies a composite video signal and an audio signal supplied from the external device to the input switching unit 28.

  The input switching unit (AV-SW (Audio Video Switch)) 28 is supplied from the composite video signal and audio signal supplied from the main tuner 26M or from the external video input terminal 27 in accordance with control from the slave microcontroller 19. One of the composite video signal and the audio signal is selected, and the selected composite video signal is supplied to the main video signal processing unit 29M, and the selected audio signal is supplied to the audio processor 33. To do.

  In addition, the input switching unit 28 is either composite video signal supplied from the sub tuner 26S or composite video signal supplied from the external video input terminal 27 in accordance with control from the slave microcontroller 19. The video signal is selected, and the selected composite video signal is supplied to the sub video signal processing unit 29S.

  Here, for example, an image based on the composite video signal demodulated by the main tuner 26M is displayed on the main screen of the LCD panel 32, and at the same time, an image based on the composite video signal demodulated by the sub tuner 26S is displayed on the sub screen of the LCD panel 32. Is displayed. At this time, when the user operates the key input unit 13 to display an image based on the composite video signal supplied from the external video input terminal 27 on the sub-screen of the LCD panel 32, an operation signal corresponding to the key operation is generated. The key input unit 13 supplies the slave microcontroller 19 via the master microcontroller 15.

  The slave microcontroller 19 selects the composite video signal from the sub tuner 26S according to the operation signal supplied via the master microcontroller 15, and the input switching unit 28 that has been supplied to the sub video signal processing unit 29S The input switching unit 28 is controlled so that the composite video signal from the video input terminal 27 is selected and supplied to the sub video signal processing unit 29S. The input switching unit 28 selects the composite video signal from the external video input terminal 27 according to the control from the slave microcontroller 19 and supplies it to the sub video signal processing unit 29S.

  The main video signal processing unit 29M separates the composite video signal from the input switching unit 28 into a luminance signal Y and a color signal C as component signals in accordance with control from the slave microcontroller 19, and further converts the color signal C into a color difference. The signal Cb and the color difference signal Cr are converted. The main video signal processing unit 29M supplies the luminance signal Y and the color difference signals Cb and Cr to the multi-screen generation IC 30.

  The sub video signal processing unit 29S obtains the luminance signal Y, the color difference signals Cb and Cr from the composite video signal supplied from the input switching unit 28 in the same manner as the main video signal processing unit 29M, and sends it to the multi-screen generation IC 30. Supply.

  The multi-screen generation IC 30 controls the video based on the luminance signal Y and the color difference signals Cb and Cr from the main video signal processing unit 29M and the luminance signal Y and the color difference from the sub video signal processing unit 29S according to the control from the slave microcontroller 19. A video luminance signal Y and color difference signals Cb and Cr are generated by superimposing the video based on the signals Cb and Cr, and supplied to the video processor 31.

  For example, the multi-screen generation IC 30 displays an image based on the composite video signal from the main tuner 26M on the main screen of the LCD panel 32, and at the same time, based on the composite video signal from the sub tuner 26S on the sub screen of the LCD panel 32. A luminance signal Y and color difference signals Cb and Cr are generated so that an image is displayed.

  The video processor 31 is based on the luminance signal Y and the color difference signals Cb and Cr supplied from the multi-screen generation IC 30, and R (Red) signal, G (Green) signal, and B (Blue) for driving the LCD panel 32. Generate a signal. Note that the video processor 31 performs signal processing according to control from the slave microcontroller 19 to thereby adjust the R signal, the G signal, and the image quality such as brightness and color of the video displayed on the LCD panel 32, and A B signal is generated. The video processor 31 supplies the generated R signal, G signal, and B signal to the LCD panel 32.

  The LCD panel 32 displays an image based on the R signal, G signal, and B signal from the video processor 31. In addition, the LCD panel 32 adjusts the image quality such as the brightness and contrast of the video displayed on the LCD panel 32 by changing the setting values of the built-in backlight and the like according to the control from the panel control IC 20.

  Further, the LCD panel 32 includes an LED that is turned on or off according to the operation mode. For example, when the operation mode of the television receiver 10 is the low power consumption mode according to the control from the panel control IC 20, The LED is turned on, and when the operation mode of the television receiver 10 is the normal mode, the LED is turned off. Thereby, the user can recognize the operation mode.

  An audio signal is supplied from the input switching unit 28 to the audio processor 33, and the audio processor 33 adjusts the volume, balance, and sound quality of the audio signal according to control from the slave microcontroller 19, and sends the audio signal to the amplifier 34. Supply.

  The amplifier 34 amplifies the audio signal supplied from the audio processor 33 and supplies the amplified audio signal to the speaker 35.

  The speaker 35 outputs sound based on the audio signal from the amplifier 34.

  In the television receiver 10 configured as described above, a broadcast video wave is received by the U / V antenna 25, and a composite video signal obtained by demodulating an RF signal based on the broadcast radio wave by the main tuner 26M or the sub tuner 26S is The input switching unit 28, the main video signal processing unit 29M or the sub video signal processing unit 29S, the multi-screen generation IC 30 and the video processor 31 are supplied to the LCD panel 32, and the video based on the composite video signal is displayed on the LCD panel 32. Is done.

  Next, FIG. 2 is a flowchart for explaining a normal mode request process in which the television receiver 10 of FIG. 1 sets its operation mode to the normal mode.

  In the normal mode request process, when the operation mode of the television receiver 10 is the low power consumption mode, for example, when the user operates the normal mode request key of the key input unit 13 (or the remote commander), Executed. As described above, in the low power consumption mode, power is supplied only to the first power supply block group such as the master microcontroller 15 and the second power supply block group such as the slave microcontroller 19 is supplied to the second power supply block group. The power supply is stopped.

  In step S <b> 11, the key input unit 13 or the light receiving unit 14 supplies an operation signal corresponding to the operation of the normal mode request key to the master microcontroller 15. When an operation signal corresponding to the operation of the normal mode request key is supplied from the key input unit 13 or the light receiving unit 14 to the master microcontroller 15, the master microcontroller 15 proceeds to step S12, and the UART switch 21 is connected to the master microcontroller 15, the panel control IC 20, It is determined whether or not it is switched to connect.

  If the master microcontroller 15 determines in step S12 that the UART switch 21 has not been switched to connect the master microcontroller 15 and the panel control IC 20, the process proceeds to step S13, where the master microcontroller 15 The UART switch 21 is controlled so that 21 connects the master microcontroller 15 and the panel control IC 20, and the process returns to step S12.

  On the other hand, if the master microcontroller 15 determines in step S12 that the UART switch 21 has been switched to connect the master microcontroller 15 and the panel control IC 20, the process proceeds to step S14.

  In step S14, the master microcontroller 15 notifies the panel control IC 20 via the UART switch 21 and the UART line 22 that the operation mode of the television receiver 10 is changed from the low power consumption mode to the normal mode. The panel control IC 20 controls the LCD panel 32 so that the LCD panel 32 can perform subsequent processing (wakes the LCD panel 32 from the low power consumption mode).

  After the process of step S14, the process proceeds to step S15, and the master microcontroller 15 causes the panel control IC 20 via the UART switch 21 and the UART line 22 so that the LCD panel 32 displays a video for mute (mute). To control. Accordingly, the panel control IC 20 controls the LCD panel 32 to display a mute video.

  Further, the master microcontroller 15 reads initial setting data for initializing the panel control IC 20 from the nonvolatile memory 16 via the IIC bus 17. Then, the master microcontroller 15 transmits initial setting data to the panel control IC 20 via the UART switch 21 and the UART line 22, and after the transmission ends, proceeds to step S16, via the UART switch 21 and the UART line 22. Data transmission to all panel control ICs 20 is stopped.

  After the process of step S16, the process proceeds to step S17, and the master microcontroller 15 waits for a certain period of time necessary for the reception by the panel control IC 20 of the initial setting data transmitted to the panel control IC 20 in step S15. Then, the process proceeds to step S18.

  Here, the panel control IC 20 performs initialization based on the initial setting data transmitted from the master microcontroller 15.

  In step S18, the master microcontroller 15 controls the UART switch 21 so that the UART switch 21 connects the slave microcontroller 19 and the panel control IC 20, and the process proceeds to step S19.

  In step S19, the master microcontroller 15 controls the power supply relay 12 so that power is supplied to the second power supply block group. The power supply relay 12 closes the contact and the power from the power supply unit 11 is received. It is assumed that the second power supply block group is supplied. As a result, the second power supply block group is activated and becomes operable.

  After the process of step S19, the process proceeds to step S20, where the master microcontroller 15 determines whether the power supplied to the slave microcontroller 19 via the power relay 12 is stable. For example, the master microcontroller 15 samples the voltage supplied (applied) to the slave microcontroller 19 at a predetermined interval, and if the sampling value of the voltage sampled in a certain period shows a certain value, It is determined that the power supplied to the controller 19 is stable.

  In step S20, when the master microcontroller 15 determines that the power supplied to the slave microcontroller 19 is not stable, the process proceeds to step S21, where the master microcontroller 15 waits for a certain time, and then proceeds to step S20. Return to.

  On the other hand, when the master microcontroller 15 determines in step S20 that the power supplied to the slave microcontroller 19 is stable, the process proceeds to step S22.

  In step S22, the master microcontroller 15 determines whether or not the initialization (initial sequence) of the slave microcontroller 19 has been completed, that is, the slave microcontroller 19 performs various processes from the nonvolatile memory 23 via the IIC bus 24. Information necessary for the control is read out, predetermined processing for controlling the panel control IC 20 and other blocks is performed, and it is determined whether or not the panel control IC 20 and other blocks can be controlled. To do.

  If the master microcontroller 15 determines in step S22 that the initialization of the slave microcontroller 19 has not ended, the process proceeds to step S23, and the master microcontroller 15 waits for a certain period of time and then returns to step S22. .

  On the other hand, if the master microcontroller 15 determines in step S22 that the initialization of the slave microcontroller 19 has been completed, the process proceeds to step S24.

  In step S <b> 24, the master microcontroller 15 and the slave microcontroller 19 perform control for displaying an image on the LCD panel 32.

  For example, the master microcontroller 15 reads the initial setting of channel selection by the main tuner 26M or the sub tuner 26S from the nonvolatile memory 16, and selects the main tuner 26M or the sub tuner 26S so as to select a channel based on the initial setting. To control.

  In addition, the slave microcontroller 19, for example, the input switching unit 28, the main video signal processing unit 29M, and the sub video signal processing so that the LCD panel 32 displays video based on the composite video signal demodulated by the main tuner 26M. The audio processor 33 is controlled so as to output the sound based on the audio signal demodulated by the main tuner 26M by controlling the unit 29S, the multi-screen generation IC 30, and the video processor 31. Further, the slave microcontroller 19 controls the panel control IC 20 via the UART switch 21 and the UART line 22 to adjust the image quality of the image displayed on the LCD panel 32.

  After the process of step S24, in step S25, the slave microcontroller 19 controls the panel control IC 20 to display an image on the LCD panel 32 (cancel mute). As a result, the panel control IC 20 cancels the mute of the LCD panel 32, displays the video supplied from the video processor 31 on the LCD panel 32, and the normal mode request processing ends.

  As described above, the UART switch 21 for switching the connection destination of the panel control IC 20 to the master microcontroller 15 or the slave microcontroller 19 is provided. When the master microcontroller 15 transits from the low power consumption mode to the normal mode, the master microcontroller 15 21, the master microcontroller 15 and the panel control IC 20 are connected to control the panel control IC 20, so that the panel control can be performed without waiting for the initialization of the slave microcontroller 19 that controls the panel control IC 20. Control of the IC 20 can be performed quickly.

  In the normal mode request process, the master microcontroller 15 performs a process of transmitting initial setting data to the panel control IC 20 (controls the panel control IC 20) via the UART switch 21 and the UART line 22, and the panel control IC 20 While the initialization is being performed, the supply of power to the slave microcontroller 19 is started and the slave microcontroller 19 is initialized. That is, the initialization of the panel control IC 20 and the initialization of the slave microcontroller 19 are performed in parallel. As a result, the time from when the user operates the normal mode request key of the key input unit 13 to when an image is displayed on the LCD panel 32 can be shortened.

  That is, FIG. 3 is a diagram for explaining the time required for processing performed at the time of transition from the low power consumption mode to the normal mode.

  Here, the upper side of FIG. 3 shows the time required for processing performed at the time of transition from the low power consumption mode to the normal mode when the panel control IC 20 is controlled only by the slave microcontroller 19. In the lower side of FIG. 3, the panel control IC 20 switches from the low power consumption mode to the normal mode when it can be controlled by either the master microcontroller 15 or the slave microcontroller 19 by switching the UART switch 21. The time required for processing performed at the time of transition is shown.

  As shown in the upper side of FIG. 3, when the panel control IC 20 is controlled only by the slave microcontroller 19, the master microcontroller 15 cannot directly control the panel control IC 20. Thereafter, the panel control IC 20 is initialized by the slave microcontroller 19 controlling the panel control IC 20. That is, since the panel control IC 20 is controlled only by the slave microcontroller 19, the initialization of the slave microcontroller 19 is completed, and the slave microcontroller 19 can control the panel control IC 20 before the slave microcontroller 19 is controlled. When the microcontroller 19 controls the panel control IC 20, the panel control IC 20 is initialized.

  On the other hand, as shown in the lower side of FIG. 3, when the panel control IC 20 can be controlled by either the master microcontroller 15 or the slave microcontroller 19 by switching the UART switch 21, the master microcontroller 15 By controlling the panel control IC 20, the panel control IC 20 can be initialized while the slave microcontroller 19 can be initialized, that is, the panel control IC 20 and the slave microcontroller 19 can be initialized. Can be performed in parallel, so that the time required for processing performed at the time of transition from the low power consumption mode to the normal mode can be shortened. As a result, the user requests the normal mode of the key input unit 13. After the key is operated, the LCD panel It is possible to shorten the time until the video from the video processor 31 is displayed on the screen 32.

  Further, the master microcontroller 15 waits for a predetermined time necessary for the reception of the initial setting data transmitted to the panel control IC 20 by the panel control IC 20, and then the UART switch 21 is connected to the slave microcontroller 19 and the panel. Since the UART switch 21 is controlled so as to be connected to the control IC 20, the panel control IC 20 can reliably receive the initial setting data.

  Next, FIG. 4 is a flowchart illustrating low power consumption mode request processing in which the television receiver 10 of FIG. 1 sets its operation mode to the low power consumption mode.

  In the low power consumption mode request process, when the operation mode of the television receiver 10 is the normal mode, for example, the user operates a low power consumption mode request key of the key input unit 13 (or the remote commander). And executed. In the normal mode, the UART switch 21 connects the slave microcontroller 19 and the panel control IC 20. Therefore, the panel control IC 20 is controlled by the slave microcontroller 19 via the UART switch 21 and the UART line 22. Has been.

  In step S <b> 31, the key input unit 13 or the light receiving unit 14 supplies an operation signal corresponding to the operation of the low power consumption mode request key to the master microcontroller 15. When an operation signal corresponding to the operation of the low power consumption mode request key is supplied from the key input unit 13 or the light receiving unit 14 to the master microcontroller 15, the master microcontroller 15 proceeds to step S32 and sets the slave to mute the LCD panel 32. The microcontroller 19 is controlled.

  After the process of step S32, the process proceeds to step S33, and the slave microcontroller 19 controls the panel control IC 20 to put the LCD panel 32 in the mute state according to the control of the master microcontroller 15, and the process proceeds to step S34. The panel control IC 20 controls the LCD panel 32, whereby the LCD panel 32 is muted.

  In step S34, the master microcontroller 15 notifies the slave microcontroller 19 that the operation mode of the television receiver 10 is changed from the normal mode to the low power consumption mode, and proceeds to step S35.

  In step S35, the slave microcontroller 19 that has received the notification of transition from the master microcontroller 15 transmits data for controlling the panel control IC 20 to the panel control IC 20 via the UART switch 21 and the UART line 22. If so, the transmission of the data is stopped, and the process proceeds to step S36.

  In step S36, the master microcontroller 15 waits for a certain period of time necessary for the reception of data transmitted from the slave microcontroller 19 to the panel control IC 20 at the panel control IC 20, and then proceeds to step S37. Then, the UART switch 21 is controlled to connect the master microcontroller 15 and the panel control IC 20, and the process proceeds to step S38.

  In step S38, the master microcontroller 15 controls the power supply relay 12 to stop supplying power to the second power supply block group, whereby the power supply relay 12 opens (opens) the contact. Thus, the power from the power supply unit 11 is not supplied to the second power supply block group, that is, the power consumption mode is entered, and the process is terminated.

  As described above, the master microcontroller 15 controls the UART switch 21 so as to connect the master microcontroller 15 and the panel control IC 20, and at the time of transition from the low power consumption mode to the normal mode, Since the panel control IC 20 controlled by the controller 19 is controlled instead of the slave microcontroller 19, the panel control IC 20 can be quickly controlled.

  In this embodiment, the device to be controlled by the master microcontroller 15 and the slave microcontroller 19 is the panel control IC 20. However, the device to be controlled by the master microcontroller 15 and the slave microcontroller 19 Is not limited to the panel control IC 20.

  Further, the interface between the master microcontroller 15 or the slave microcontroller 19 and the panel control IC 20 may be other than UART, for example, IIC or the like.

  Furthermore, the present invention can be applied to an electronic apparatus that controls a device with a plurality of microcontrollers in addition to a television receiver.

  Note that the processes described with reference to the flowcharts described above do not necessarily have to be processed in time series in the order described in the flowcharts, but are performed in parallel or individually (for example, parallel processes or objects). Processing).

  The embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

It is a block diagram which shows the structural example of one Embodiment of the television receiver to which this invention is applied. It is a flowchart explaining the process in which the television receiver 10 changes the operation mode from a low power consumption mode to a normal mode. It is a figure explaining the time required for the process performed at the time of the transition from a low power consumption mode to a normal mode. It is a flowchart explaining the process in which the television receiver 10 changes the operation mode from a normal mode to a low power consumption mode.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Television receiver, 11 Power supply part, 12 Power supply relay, 13 Key input part, 14 Light-receiving part, 15 Master microcontroller, 15A CPU, 15B Memory, 16 Non-volatile memory, 17, 18 IIC bus, 19 Slave microcontroller, 19A CPU, 19B memory, 20 Panel control IC, 21 UART switch, 22 UART line, 23 Non-volatile memory, 24 IIC bus, 25 U / V antenna, 26M main tuner, 27S sub-tuner, 28 Input switching unit, 29 Slave micro Controller, 30 Multi-screen generation IC, 31 Video processor, 32 LCD panel, 33 Audio processor, 34 Amplifier, 35 Speaker

Claims (6)

First control means for controlling the device;
A second control means for performing power management and controlling the first control means;
Switching means for switching the connection destination of the device to the first control means or the second control means, and
The second control means further controls the device by connecting the device and the second control means by controlling the switching means to control the device. The electronic device has, as its operation mode,
A normal mode in which power from the power source is supplied to the first control means and the second control means;
The second control means has a low power consumption mode in which power from the power source is supplied, but the first control means is not supplied with power from the power source, and
When the operation mode of the electronic device is a normal mode, the device is connected to the first control unit, and the first control unit controls the device;
When the operation mode of the electronic device transitions from the low power consumption mode to the normal mode, the device is connected to the second control unit, and the second control unit controls the device, and The electronic apparatus according to claim 1, wherein the device is connected to the first control unit after one control unit is in a state in which the device can be controlled. The second control means notifies the first control means that the electronic device transitions to the low power consumption mode when the operation mode of the electronic device transitions from the normal mode to the low power consumption mode.
The first control unit stops transmission of data to be transmitted to the device in order to control the device when notified of transition from the second control unit to the low power consumption mode. The electronic device as described in. The second control unit transmits initial setting data to the device connected to the second control unit when the operation mode of the electronic device transitions from the low power consumption mode to the normal mode. The electronic device according to claim 2, wherein the switching unit is controlled to connect the device and the first control unit after a predetermined period has elapsed since the transmission of the initial setting data was stopped. First control means for controlling the device;
A second control means for performing power management and controlling the first control means;
In a method for controlling an electronic device comprising: a switching unit that switches a connection destination of the device to the first control unit or the second control unit.
A control method comprising the step of controlling the device by connecting the device and the second control unit by controlling the switching unit in the second control unit. First control means for controlling the device;
A second control means for performing power management and controlling the first control means;
In a program to be executed by a computer built in the second control means of an electronic device comprising: a switching means for switching the connection destination of the device to the first control means or the second control means;
A program for causing a computer to execute processing including a step of controlling the device by connecting the device and the second control unit by controlling the switching unit.

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