JP4605422B2 - Display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display device, and more particularly, to a display device that can display television broadcast video even when a connected personal computer is not activated.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there are personal computers that can display television broadcast video on a connected display, and record and play back the video.
[0003]
FIG. 1 shows an example of such a personal computer system. The personal computer 1 includes a TV tuner card 2 that extracts an AV signal of a broadcast channel desired by a user from a television broadcast signal supplied from an antenna. The extracted video signal of the AV signal is converted into a video signal having the same format as the video signal of the personal computer 1 and supplied to the display 5 for display. The extracted AV signal is converted into encoded data by an encoder (not shown) such as an MPEG2 system of the personal computer 1 and recorded on a hard disk or the like, and is read and decoded, and is supplied to the display 5. Is displayed.
[0004]
Connected to the personal computer 1 are a keyboard 3 and a mouse 4 that are operated by a user to input a command for instructing the personal computer 1 to start and end the reception of a television broadcast and a command for switching a desired broadcast channel. Has been.
[0005]
In order to display the video of the television program on the display 5 in FIG. 1, the personal computer 1 must be in an activated state.
[0006]
[Problems to be solved by the invention]
Therefore, when the user wants to watch a television program using the display 5, if the personal computer 1 is not activated, the user needs to activate the personal computer 1, and the activation takes a time of several tens to hundreds of seconds. Therefore, there is a problem that lacks convenience for the user.
[0007]
Conventionally, there is a television receiver that can display a video signal supplied from a personal computer. If the television receiver is connected to the personal computer 1 described above, the television program is simply viewed. If so, there is no need to start the personal computer 1. However, when the television receiver is used connected to the personal computer 1, in order to use the function of recording and playing back the television program video by the personal computer 1, the television broadcast signal is transmitted from the antenna. Since it is necessary to supply both the television receiver and the personal computer 1, there is a problem that wiring and connection such as an antenna line are troublesome.
[0008]
Further, in this case, a common operation device is used such that a dedicated remote controller or the like is used to operate the television receiver, and a keyboard 3 or a mouse 4 is used to operate the personal computer 1. As a result, there is a problem that is not convenient for the user.
[0009]
The present invention has been made in view of such a situation, and can be operated with a keyboard or a mouse by incorporating a function of receiving a television broadcast and a function of supplying a video signal of the television broadcast to a personal computer. In addition, an object of the present invention is to realize a display device that can display a video of a television program without starting up a personal computer.
[0010]
[Means for Solving the Problems]
The display device according to the present invention includes an acquisition unit that acquires the first video signal supplied from the information processing device, an operation input unit that inputs a user operation regardless of the operating state of the information processing device, and an input In accordance with a user operation, a television broadcast signal is received, a receiving means for generating a second video signal based on the television broadcast signal, and the first video signal and the second video signal are combined, Combining means for generating the video signal, selection means for selecting one of the first to third video signals according to the input user's operation, and display means for displaying an image for the selected video signal And supply means for supplying a second video signal based on the television broadcast signal to the information processing apparatus in operation via a predetermined bus.
[0011]
The operation input means may be adapted to include a keyboard, mouse, or at least one of the remote controllers.
[0012]
The display device according to the present invention may further include notification means for notifying the information processing apparatus of information on the user's operation input by the operation input means via the predetermined bus.
[0013]
The predetermined bus may be a USB.
[0014]
In the display device of the present invention, the first video signal supplied from the information processing device is acquired , and a user operation is input regardless of the operating state of the information processing device. The John broadcast signal is received, and a second video signal is generated based on the television broadcast signal. Further, the first video signal and the second video signal are combined to generate a third video signal, and the selected video signal among the first to third video signals is input in accordance with the input user operation. The video for is displayed. Further, the second video signal based on the television broadcast signal is supplied to the information processing apparatus in operation via a predetermined bus.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
A configuration example of a system to which a display according to an embodiment of the present invention is applied will be described with reference to FIG. This display 11 has a TV tuner 12 built in like a normal television receiver, and a video of a channel corresponding to a channel selection command from a user from a TV broadcast signal supplied from an antenna (not shown). Restore the signal. The restored video signal is displayed on a CRT (Cathode Ray Tube) 27 (FIG. 3).
[0016]
The display 11 is connected to the display output unit 58 (FIG. 4) of the personal computer (PC) 16, and displays the video signal video input to the video signal input selector 24 (FIG. 3) on the CRT 27. Further, the display 11 is also connected to the personal computer 16 via a USB (Universal Serial Bus) line 17 capable of bidirectional data communication, and communicates AV signals, control commands, and other data.
[0017]
A keyboard 13, a mouse 14, and a modem 15 are connected to the display 11. The keyboard 13 and the mouse 14 receive user operations for instructing channel selection and volume adjustment related to reception of television broadcasts on the display 11, and accept user operations on the personal computer 16 connected to the display 11. .
[0018]
The modem 15 connects the personal computer 16 connected to the display 11 to a network represented by the Internet through a telephone line. Note that the modem 15 may be built in the display 11.
[0019]
Next, FIG. 3 shows a configuration example of the display 11. In the display 11, the TV broadcast signal from the antenna is supplied to the TV tuner 12, and the video signal from the personal computer 16 is supplied to the video signal input selector 24, and the vertical synchronization signal corresponding to the video signal from the personal computer 16 ( VS) and the horizontal synchronizing signal (HS) are supplied to the synchronizing signal input selector 28.
[0020]
The TV tuner 12 extracts and demodulates the frequency component corresponding to the user's channel selection from the TV broadcast signal supplied from the antenna, and outputs the resulting composite video (CVBS) signal to the comb filter 21. The comb filter 21 performs Y / C separation on the composite signal and outputs the obtained Y / C signal to the chroma decoder 22. The chroma decoder 22 separates the Y / C signal into YUV (Y / Cb / Cr) signals and outputs them to the matrix circuit 23. Further, the chroma decoder 22 extracts vertical and horizontal synchronizing signals from the Y / C signal and outputs them to the synchronizing signal input selector 28. The matrix circuit 23 converts the YUV signal into an RGB signal and outputs it to the video signal input selector 24.
[0021]
The video signal input selector 24 selects the RGB signal input from the matrix circuit 23 or the video signal (RGB signal) input from the personal computer 16 or the RGB signal input from the personal computer 16 and the matrix circuit. The RGB signals input from 23 are combined (a so-called picture-in-picture RGB signal is generated) and output to the video amplifier 25. The video amplifier 25 amplifies the RGB signal input from the video signal input selector 2 and the OSD (On Screen Display) RGB signal input from the OSD signal generator 30 and outputs the amplified signal to the CRT 27. The CRT 27 displays an image corresponding to the RGB signal input from the video amplifier 25. Instead of the CRT 27, a display device such as an LCD (Liquid Crystal Display), FED (Field Emission Display), or PALC may be used.
[0022]
The synchronizing signal input selector 28 is supplied with the vertical and horizontal synchronizing signals from the chroma decoder 22 and the vertical and horizontal synchronizing signals from the personal computer 16, and the vertical corresponding to the RGB signal output from the video signal input selector 24. The horizontal synchronizing signal is output to the deflection controller 29. The deflection controller 29 drives a coil such as a DY (Deflection Yoke) 26 of the CRT 27 based on the synchronization signal from the synchronization signal input selector 28.
[0023]
The OSD generator 30 generates a character display signal for adjusting channel display and contrast, and outputs the character display signal to the video amplifier 25 as an RGB signal. An EEPROM (Electrically Erasable Programmable ROM) 31 stores character codes and font data used when the OSD generator 30 generates a character display signal. A simple ROM may be used instead of the EEPROM 31.
[0024]
The microprocessor 32 controls each circuit of the display 11. Further, the microprocessor 32 acquires a video signal from the video signal input selector 24, performs predetermined signal processing (for example, processing for conversion into a format suitable for transmission to the USB line 17) using the RAM 33 as a work area, Output to the communication interface (I / F) 34 and the USB interface 35.
[0025]
The communication interface 34 controls communication with the modem 15. The USB interface 35 transmits a video signal subjected to predetermined signal processing and an operation signal of the keyboard 13 and the mouse 14 supplied from the microprocessor 32 to the personal computer 16 via the USB line 17. The IR sensor 36 receives a command transmitted by infrared from a remote controller (not shown) and outputs the command to the microprocessor 32. The input device interface 37 receives an operation signal input from the keyboard 13 and the mouse 14 in response to a user operation, and outputs the operation signal to the microprocessor 32.
[0026]
FIG. 4 shows a configuration example of the personal computer 16. The personal computer 16 includes a CPU (Central Processing Unit) 51. An input / output interface 55 is connected to the CPU 51 via the bus 54. The input / output interface 55 includes a USB interface 56 that receives a video signal and an operation signal supplied from the display 11 via the USB line 17, and a display output unit 58 that supplies the video signal and its vertical and horizontal synchronization signals to the display 11. A storage unit 59 including a hard disk drive for storing programs and various data, a communication unit 60 connected to a LAN or the like to communicate data, and a drive for reading / writing data from / to a recording medium such as the magnetic disk 62 to the semiconductor memory 65 61 is connected. A ROM (Read Only Memory) 52 and a RAM (Random Access Memory) 53 are connected to the bus 54.
[0027]
The operation signal received by the USB interface 56 is notified to the CPU 51 via the input / output interface 55 and the bus 54. The video signal received by the USB interface 56 is subjected to predetermined signal processing and stored in the storage unit 59.
[0028]
Programs for recording and reproducing the video signal supplied from the display 11 via the USB line 17 in this personal computer are a magnetic disk 62 (including a floppy disk), an optical disk 63 (CD-ROM ( Compact disc-read only memory (DVD) (including digital versatile disc), magneto-optical disc 64 (including MD (mini disc)), or semiconductor memory 65 is supplied to a personal computer, and drive 61 And installed in a hard disk drive built in the storage unit 59. The program installed in the storage unit 59 corresponds to a user operation on the keyboard 13 and mouse 14 connected to the display 11, and in response to an instruction from the CPU 51 corresponding to an operation signal input via the USB interface 56. The program is loaded from the storage unit 59 to the RAM 53 and executed.
[0029]
Next, the operation of the system when the user views a television broadcast will be described. In this case, the user only has to turn on the power of the display 11, and starting the personal computer 16 is not a necessary condition.
[0030]
In the display 11 that is turned on, the TV tuner 12 selects a user channel from the TV broadcast signal supplied from the antenna in response to the user's channel selection operation on the keyboard 13, mouse 14, or remote controller. Are extracted and demodulated, and the obtained composite video signal is Y / C separated by the comb filter 21, and the obtained Y / C signal is separated into a YUV signal by the chroma decoder 22, The matrix circuit 23 converts the YUV signal into an RGB signal and outputs it to the video signal input selector 24, which is selected by the video signal input selector 24 and supplied to the video amplifier 25.
[0031]
At this time, when the video signal from the personal computer 16 is input to the video signal input selector 24 (that is, when the personal computer 16 is activated), the user displays only the image of the television broadcast on the screen. Or only the video of the personal computer 16 is displayed, the video of the television broadcast is pictured in picture on the video of the personal computer 16, or the video of the personal computer 16 is displayed on the video of the television broadcast. It is possible to select whether to display a picture-in-picture image.
[0032]
However, when the video signal from the personal computer 16 is not input to the video signal input selector 24 (that is, when the personal computer 16 is not activated), only television broadcast video is displayed. Is only possible.
[0033]
The RGB signal output from the video signal input selector 24 is amplified by the video amplifier 25 and displayed by the CRT 27.
[0034]
The display 11 can also display video data input from the communication interface 34 or the USB interface 35, for example.
[0035]
Next, control target switching processing of the connected keyboard 13 and mouse 14 by the display 11 will be described with reference to the flowchart of FIG. In step S <b> 1, the microprocessor 32 of the display 11 determines whether or not the personal computer 16 is powered on based on whether or not the video signal from the personal computer 16 is input to the video signal input selector 24. To do. If it is determined that the personal computer 16 is powered on, the process proceeds to step S2.
[0036]
In step S <b> 2, the microprocessor 32 sets the control target of the keyboard 13 and mouse 14 as the personal computer 16, and sends operation signals from the keyboard 13 and mouse 14 input via the input device interface 37 to the USB interface 35 and USB line 17. To the personal computer 16.
[0037]
Conversely, if it is determined in step S1 that the personal computer 16 is powered off, the process proceeds to step S3.
[0038]
In step S <b> 3, the microprocessor 32 sets the control target of the keyboard 13 and the mouse 14 as the display 11, and controls each part of the display 11 based on the operation signal from the keyboard 13 and the mouse 14 input via the input device interface 37. .
[0039]
As described above, when the personal computer 16 is not activated, the control after the TV tuner 12 of the display 11 corresponding to operations such as channel selection using the keyboard 13 and the mouse 14 is directly performed by the microprocessor 32. Done. In addition, when the personal computer 16 is activated, the personal computer 16 via the USB line 17 controls the TV 11 and subsequent controls of the display 11 corresponding to operations such as channel selection using the keyboard 13 and the mouse 14. Then, the microprocessor 32 executes in accordance with the instruction.
[0040]
Therefore, even when the personal computer 16 is activated or not activated, the user performs an operation for displaying a television broadcast image on the display 11 using the keyboard 13 and the mouse. 14 can be used, so that an effect can be expected in suppressing operation mistakes.
[0041]
Instead of the USB line 17, for example, an IEEE (Institute of Electrical and Electronics Engineers) 1394 bus may be used.
[0042]
In this specification, the system represents the entire apparatus constituted by a plurality of apparatuses.
[0043]
【The invention's effect】
As described above, according to the display device of the present invention is operable by keyboard or a mouse, and is possible to realize a display capable of displaying device the image of the television program in a state that does not start the information processing apparatus It becomes possible.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an example of a configuration of a personal computer system capable of displaying a conventional television broadcast video.
FIG. 2 is a block diagram showing a configuration example of a system including a display 11 according to an embodiment of the present invention.
3 is a block diagram illustrating a configuration example of a display 11. FIG.
FIG. 4 is a block diagram illustrating a configuration example of a personal computer 16;
FIG. 5 is a flowchart for explaining control target switching processing by the display 11;
[Explanation of symbols]
11 Display, 12 TV tuner, 13 Keyboard, 14 Mouse, 15 Modem, 16 Personal computer, 17 USB line, 32 Microprocessor

Claims (4)

In a display device that displays video corresponding to the output of the information processing device,
Obtaining means for obtaining a first video signal supplied from the information processing apparatus,
Regardless of the operating state of the information processing apparatus, operation input means for inputting a user operation;
Receiving means for receiving a television broadcast signal and generating a second video signal based on the television broadcast signal in accordance with the input user operation;
Combining means for combining the first video signal and the second video signal to generate a third video signal;
Selecting means for selecting one of the first to third video signals in accordance with the input user operation;
Display means for displaying video for the selected video signal;
And a supply unit configured to supply the second video signal based on the television broadcast signal to the information processing apparatus in operation via a predetermined bus. The display device according to claim 1, wherein the operation input unit includes at least one of a keyboard, a mouse, and a remote controller. The display device according to claim 1, further comprising notification means for notifying the information processing apparatus of information on the operation of the user input by the operation input means via the predetermined bus. The display device according to claim 1, wherein the predetermined bus is a USB.

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