JP2000250503A - Control system for image display device and control method for image display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adapt an image display part to be connected even if its characteristics change by providing in the image display part with a specific information transmitting means which transmits specification information specifying the characteristics of its device to a supply source and a display part communication means which communicates a signal including a video signal determined by a determining means for the supply source. SOLUTION: When an ID request command is sent to an image display part 1 and received, it is checked whether or not the received ID is already known by its terminal part 2 and the specifications of the image display part can be grasped. If the display part is not known and a standard monitor is not connected either, a specification request command is sent to the image display part 1. Once specification information is received from the image display part 1, it is stored in a nonvolatile memory on condition that it is applicable to its terminal part 2. Then the image display part 1 is requested to transmit necessary adjustment data according to selected specifications. On receiving the adjustment data, the specifications of the image display part 1 can be grasped, so normal processes begin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display control system including a supply source for transmitting a signal including at least a video signal, and an image display unit for receiving a signal from the supply source and displaying a corresponding image. And an image display system control method.

[0002]

2. Description of the Related Art FIG. 49 shows a conventional arrangement for displaying various images on a television receiver for receiving and displaying a television broadcast. Conventionally, as shown in FIG. 49, a television receiver has an antenna line for terrestrial broadcasting (VHS / UHF) and a satellite broadcast (BS) as an antenna line.
Antenna wire is connected. Further, as a cable from another display information supply source, for example, a video signal line and an audio signal line from a video deck, a video signal line and an audio signal line from an LD / DVD playback device, and a digital broadcast receiving device (STB) ), Each signal line cable was connected.

As described above, in the conventional television receiver, the display unit, the tuner unit, the input signal selection unit, and the like are all integrally formed. For this reason inevitably body had to become a large-scale housing in width thickness.

On the other hand, in recent years, televisions have also become thinner, and wall-mounted televisions have appeared. In this wall-mounted television, the thickness must be reduced as much as possible, and the weight must be small. For this reason, in this type of television, the image display unit and the terminal unit that supplies display information to the image display unit are separate casings.

[0005]

However, in this type of conventional wall-mounted television or the like, the image display unit and the terminal unit are paired with each other to form one television receiver.
For example, one terminal unit can connect only one type of image display unit. Alternatively, the image display unit for sending the display information cannot be changed unless a very troublesome operation is performed.

Further, the adjustment of the picture quality of the television and the like can be performed only on either the terminal section or the image display section, which is inconvenient.

[0007]

The present invention has, for example, the following arrangement as one means for achieving the above object.

That is, an image display control system comprising: a supply source for transmitting a signal including at least a video signal; and an image display unit for receiving a signal from the supply source and displaying a corresponding image. Source is a characteristic acquisition unit that acquires characteristic information of the image display unit when power is turned on, and a determination unit that determines a signal communication specification with the image display unit from characteristic data acquired by the characteristic acquisition unit, Communication means for performing communication of a signal including the video signal in the communication specification determined by the determination means, the image display unit,
Specific information transmitting means for transmitting specific information for specifying characteristics of the apparatus to the supply source, and display unit communication means for communicating a signal including the video signal determined by the determination means of the supply source. Features.

[0009] For example, the characteristic acquiring means includes: characteristic information requesting means for transmitting a request for transmitting characteristic information to the image display unit; detecting means for detecting a connection request including characteristic information from the image display unit; A connection request transmission unit that transmits a connection request including the specific information of the own device to the supply source, the connection request transmission unit including: a characteristic information detection unit that detects characteristic information returned from the image display unit; And a characteristic information transmitting unit that transmits characteristic information of the apparatus in response to a characteristic information transmission request from a supply source.

For example, if the characteristic information requesting means does not return the characteristic information from the image display unit even after transmitting the characteristic information transmission request a predetermined number of times after the power source is turned on, the characteristic information requesting means is provided. The transmission of the transmission request is stopped. Alternatively, the connection request transmitting unit may be configured to transmit the characteristic information from the supply source if the transmission request of the characteristic information is not returned from the supply source even if the connection request is transmitted a predetermined number of times after the image display unit is turned on. It is characterized by monitoring the detection of the information transmission request.

Further, for example, the request for transmission of the characteristic information by the characteristic information requesting means includes a request for transmission of the specification information of the image display unit, and the image display unit responds to the request for transmission of the specification information. Is returned.

Also, for example, the transmission request for the characteristic information by the characteristic information requesting means includes a transmission request for the adjustment information of the image display unit, and the image display unit responds to the request for the transmission of the adjustment information. Is returned. Alternatively, the determining means specifies a display screen size of the image display unit from the characteristic information, determines a video signal amount to be transmitted corresponding to the specified display screen size, and determines a signal communication specification. .

Also, for example, the signal communication specification determined by the determining means includes a vertical synchronization cycle and a horizontal synchronization cycle for transmitting a video signal, and a video signal transmission clock cycle.

Further, for example, the characteristic data of the image display section includes the number of pixels of a display device provided in the image display section.
Pixel array, emission characteristics of a display device included in the image display unit, gradation characteristics of the image display unit (gradation number, gamma characteristics of the display device), type of the image display unit (screen size, aspect ratio, device Types), specifications of a sound reproduction system included in the image display unit, and frame frequencies that can be displayed on the image display unit.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram for explaining a basic configuration of an embodiment according to the present invention. In FIG. 1, reference numeral 1 denotes an image display unit, which is a thin wall-mounted type in this embodiment. Reference numeral 2 denotes a terminal unit which outputs display data and audio data to the image display unit 1 using synchronous bidirectional serial digital data described later, and includes a tuner unit for receiving a television broadcast as described later.

Reference numeral 3 denotes a video deck which is a supply source of image and sound signals to the terminal unit 2, and 4 denotes a laser disk or a DV.
An LD / DVD player 5 for reproducing a D disk and STBs 5 for receiving and selecting a digital broadcast.

The terminal unit 2 is connected to a connection cable for a supply source of each of these image signals and the like, and also has an antenna line for terrestrial broadcast (VHS / UHS) to the tuner unit and a satellite broadcast (BS). Antenna wires are also connected. However, between the terminal unit 2 and the image display unit 1, basically, only one thin cable is connected,
Even a wall-mounted image display unit has a configuration in which cable processing is easy and the appearance is not unsightly.

The detailed configuration of the image display unit 1 and the terminal unit 2 of the present embodiment having the above system configuration will be described below with reference to FIG. First, the detailed configuration of the image display unit 1 will be described.

In the image display unit 1, reference numeral 101 denotes a display unit CPU that controls the entire image display unit 1 and has a built-in ROM for storing a control procedure and the like shown in a flowchart described later. The display unit CPU 101 includes a display unit modem 103.
In accordance with the command data received from the terminal unit 2, reception control of various types of reception data is performed. The control of each unit is performed via the control bus 151.

Reference numeral 102 denotes a connector for receiving a connection cable with the terminal unit 2, 103 denotes a display unit modem, and 104 denotes a display unit CP.
Control of U101 and playback SY from display unit modem 103
A timing generator that generates control timing of the image display unit 1 according to the NC signal or the CLK signal.

Reference numeral 105 designates 2 which is decoded by the display
A video signal processing unit that converts a 4-bit digital video signal into a luminance image signal that can be displayed on the display panel 110 and outputs the converted signal. The timing of the luminance signal from the video signal processing unit 105 is determined according to the driving conditions from the display unit CPU 101. A panel driving unit that drives the display panel 110 at a timing from the generating unit, 110 is a display panel.

Reference numeral 121 denotes a D / A converter that receives a 16-bit digital audio signal from the display modem 103 in accordance with the reception timing from the timing generator and converts it into a corresponding analog audio signal. Reference numeral 122 denotes an audio amplifier for amplifying an input analog signal from the D / A converter 121, and reference numeral 123 denotes a speaker.

Reference numeral 130 denotes a user interface (user I / F) for performing various operation inputs from the user. Here, in addition to, for example, display adjustment, detection of, for example, remote control input is also included.

Next, the details of the terminal unit 2 will be described.

In the terminal unit 2, reference numeral 201 denotes a terminal CPU which controls the entire control of the terminal unit 2, and has a built-in ROM for storing a control procedure and the like shown in a flowchart described later.
The terminal CPU 201 controls the timing control unit 204 and the video signal processing unit 20 so that the display data can be transmitted to the image display unit 1 via the terminal modem 203 in a desired format.
5 is controlled. Also, the control command data is output via the terminal modem 203 in the same manner as the control command data for the image display unit 1.
The control of each unit is performed via the control bus 251.

Reference numeral 202 denotes a cable connector for connecting to the image display unit 1, reference numeral 203 denotes a terminal modem, and reference numeral 204 denotes a terminal CPU 20.
1 is a timing generation unit of the terminal which outputs a SYNC signal or a CLK signal to the terminal modem 203 and a command timing signal indicating a command transmission timing.

Reference numeral 205 denotes an input image signal from the input I / F 220 and an image signal (video signal) from the tuner 240.
Is a video signal processing unit that receives the input signal, converts it into a corresponding 24-bit digital video signal, and outputs it to the terminal modem 203. An audio signal processing unit 210 also receives an input audio signal (such as an audio signal) from the input I / F 220, converts the input audio signal into a corresponding 16-bit digital audio signal, and outputs the digital audio signal to the terminal modem 203.

Reference numeral 220 denotes an interface with a supply source (3 to 5) for each image information shown in FIG.
The image information signal and the audio signal from the tuner unit 240 are input, and one of the inputs is selected under the control of the terminal CPU 201, and the audio signal is processed by the audio signal processing unit 210.
The image information signal is supplied to the video signal processing unit 205 as a video signal, the clock signal such as a SYNC signal is supplied to the timing generation unit 204, and the input signal discrimination data is supplied to the terminal CPU2.
01 are output.

Reference numeral 230 denotes a user interface (user I / F) for inputting various operations from the user. Here, in addition to, for example, display adjustment, detection of, for example, remote control input is also included. Reference numeral 240 denotes a tuner unit that receives terrestrial broadcasting and satellite broadcasting. In addition, 221-
Reference numeral 223 denotes an input terminal from the supply sources (3 to 5), 241 denotes an antenna input for terrestrial broadcasting, and 242 denotes an antenna input for satellite broadcasting.

The terminal unit 2 having the above configuration is not limited in the specification of the image display unit to be connected, and can be connected to an image display unit of various specifications as long as the image display unit has the same interface specification. Then, the terminal unit 2 and the image display unit 1
The detailed configuration of the interface circuit portion and the input / output portion of the modem will be described with reference to FIG.

In the display modem 103, an input / output driver circuit 310 receives a signal from a communication medium in accordance with a communication direction control signal from the timing generator 104, and outputs a signal from the modulator 312. The demodulation unit 312 demodulates the received signal from the receiver unit of the driver circuit 310 and converts the demodulated serial demodulated data into 24-bit parallel demodulated data and outputs the data. The demodulation unit 312 converts the 16-bit parallel control data from the display unit CPU 101 into serial data. A modulation unit that converts the data into data, modulates the data, and outputs the data to the driver unit of the input / output driver circuit 310.

Reference numeral 313 denotes a restoration unit for restoring the demodulated signal in accordance with the timing control signal from the timing generation unit 104 and distributing it to each unit. The reproduced synchronization signal and CLK signal are output to the timing generation unit 104, and the restored video signal is output. Is output to the video signal processing unit 105, the restored audio signal is output to the D / A converter 121, and the restored command information is output to the display unit CPU 101. A driver circuit 314 outputs control data from the display unit CPU to the modulation unit.

In the terminal modem 203, reference numeral 320 denotes an input / output driver circuit for receiving a signal from a communication medium in accordance with a communication direction control signal from the timing generation unit 204 and outputting a signal from the modulation unit 322, and 321 denotes an input / output driver circuit The demodulation section 322 demodulates the received signal from the receiver section of the circuit 320 and converts the demodulated serial demodulated data into 16-bit parallel demodulated data and outputs it to the terminal CPU 201 via the driver circuit 324.
This is a modulation unit that converts a 24-bit parallel multiplexed signal from 23 into serial data, modulates the serial data, and outputs the result to the driver unit of the input / output driver circuit 320.

323 receives a video signal from the video signal processing unit 205, an audio signal from the audio signal processing unit 210, and control information from the terminal CPU 201, respectively.
A multiplexing unit that multiplexes the signals according to the timing signal from the timing generation unit 204 so as not to overlap and outputs the multiplexed signals to the modulation unit 322. A driver circuit 324 outputs control data from the image display unit from the demodulation unit 321 to the terminal CPU 201.

In this embodiment, the terminal unit 2 and the image display unit 1 can exchange various kinds of information with only a pair of signal lines, and the connection cable can be made simple and thin. Basically, the communication medium that connects the image display unit 1 and the terminal unit 2 is a two-wire twisted cable, and the transmission format is described later.
Is determined by the type of input signal being received.

However, the communication medium is not limited to a cable using an electric conductor wire, but may be an optical signal communication line such as an optical fiber or a wireless communication such as an electromagnetic wave. For example, as shown in FIG. 46 to be described later, an optical communication unit provided above or below the display unit, and a terminal-side optical communication unit installed near the optical communication unit of the display unit by wires or the like from the terminal unit. May be provided.

The input I / F 220 of the present embodiment can input image information of various specifications. FIG. 4 shows a configuration example of a portion that receives image information of different specifications of the input I / F 220 and outputs the image information to the video signal processing unit 205 according to the present embodiment. Although only the image signal is shown in FIG. 4, it goes without saying that a signal having a different specification is also received and shared and output as an audio signal.

The input section of the image information of the input I / F 220
NTSC composite input and S terminal input, HD
Muse signal input and component signal input of TV specification and PC input of PC (computer graphic) specification are possible.
The signal is converted into a B signal and output to the video signal processing unit 205.

For example, a composite signal of the NTSC specification is transmitted from a composite input to an NTSC decoder 401 to be decoded, and is transmitted to a selector 402. The S input signal from the S terminal input is also input to the selector 402, and one of the inputs is selected. For example, here
It is desirable that the S terminal input be controlled so as to have priority.

The signal from the selector 402 is sent to the IP conversion unit 4
04 and the synchronization separation unit 403. A video signal is sent to an IP conversion unit (interlace / progressive conversion unit) 404. If progressive scanning is requested according to the specifications of the image display unit 1, for example, a video signal of 240 lines / 60 Hz is converted to 480 video signals. The Y / color difference signal converted to line / 60 Hz is output. Alternatively, in the case of a QVGA-equivalent pixel number panel (320 × 240), output is performed at 240 lines / 60 Hz without IP conversion.

The matrix processing unit 405 converts this signal into a corresponding RGB signal and outputs it to the multiplexer 440. On the other hand, in the synchronization separation section 403, the synchronization signal (H
−SYNC signal and V-SYNC signal) and outputs the separated signal to the input signal determination unit 430.

For example, a muse of the HDTV specification (Mus)
e) The signal is decoded by a Muse decoder 411 and sent to the selector 412. Further, in the present embodiment, a high-definition component signal input is also provided, which is directly input to the selector 412, and one of the inputs is selected. For example, here, the component input is controlled so as to have priority.

The Y / color difference signal from the selector 412 is sent to the matrix processing unit 415. Matrix processing unit 4
At 15, this signal is converted into a corresponding RGB signal and output to the multiplexer 440. On the other hand, the synchronization separation unit 41
In 3, the synchronization signal (H-SYNC signal, V-SYNC signal) is separated and output to the input signal discrimination section 430. Further, for example, a PC input signal of the PC specification is
1, the synchronization signal (SYNC) is sent to the input signal discrimination section 430, and the RGB signal is
Is output to

The input signal discriminating section 430 receives each synchronization signal (SYNC signal) and discriminates what the input signal is based on the frequency and type (polarity, HV separation or mixed SYNC, etc.) of the received synchronization signal. Then, the result of the determination is notified and output to the terminal CPU 201. Multiplexer 4
The terminal 40 selects one of the input signals under the control of the terminal CPU 201 and outputs it to the video signal processing unit 205.

NT in input I / F 220 shown in FIG.
Input I / F 204 when image signal of SC specification is input
FIG. 5 shows an example of the output timing.

The example of FIG. 5 is a timing example when it is assumed that the output of the input I / F 204 is a signal of an effective video period of about 480 lines vertically and about 28.6 μs horizontally and displayed with about 10% overscan. And the display period is about 430 lines vertically and about 25.7 μS horizontally. In this embodiment, the default of the 10% overscan can be variably set by the user I / F 230.

In the case of the NTSC specification, as shown in FIG. 5, the image signal of the NTSC specification is (1 / 59.94H)
z), a vertical synchronizing signal (VSYNC signal) arrives and is double-speed-converted by the IP unit (1 / 31.4).
The horizontal synchronization signal (HSYNC signal) arrives at a period of 7 KHz).

Then, for example, the period shown in FIG. 5 is fetched by the video signal processing unit 205 and resampled so as to conform to the resolution of the image display unit 1. For example, when the display panel 110 of the image display unit is a panel of 852 × 480 pixels, sampling is performed using a horizontal CLK signal of about 33.1 MHz, and the vertical is about 480 lines of image data of about 430 lines. Inter-line interpolation will be performed.

On the other hand, even if the same
FIG. 6 shows an example of the output timing of the input I / F 204 when V is input.
Shown in The example of FIG. 6 shows a timing example when it is assumed that the output of the input I / F 204 is displayed with about 7% overscan.

As shown in FIG. 6, an image signal of the HDTV specification has a vertical synchronizing signal (VSY) at a period of (1/60 Hz).
NC signal) and a horizontal synchronizing signal (HSYNC signal) with a period of (1 / 33.75 KHz). Then, for example, this period shown in FIG.
05 is sampled and resampled to match the resolution of the image display unit 1. For example, when the display panel 110 of the image display unit is a panel of 852 × 480 pixels, sampling is performed with a CLK signal of about 35.5 MHz horizontally, and about 480 out of 517 effective lines are output as they are vertically.

Next, control of the present embodiment having the above configuration will be described below. The terminal unit 2 of the present embodiment is
As described above, it is possible to control the image display units of various specifications. For this reason, when the power of the terminal unit 2 is turned on, first, a power supply for confirming what type of image display unit is connected is connected. Execute ON processing.

An example of an operation check control procedure with the image display unit 1 after the power to the terminal unit 2 is turned on will be described below with reference to FIG. Since it is not clear what the specifications of the partner image display unit are, the operation confirmation control procedure is an asynchronous communication control with a communication speed of 300 BPS or 1200 BPS as a communication control procedure that can easily perform communication control with the partner. A procedure is negotiated, and communication control is performed using this communication control procedure.

When the terminal unit 2 is powered on, first,
An ID request (connection request) is sent to the image display unit 1. Upon receiving this, the image display unit 1 immediately proceeds to the image display unit 1.
The ID of the own device is returned to the terminal unit 2. Therefore, if the ID is returned from the image display unit 1, the terminal unit 2 determines that the image display unit 1 is up.

However, if the image display unit 1 is not activated when the power of the terminal unit 2 is turned on, there is no response to the ID request. Therefore, if the terminal unit 2 does not return the ID from the image display unit 1 even after sending the ID request at a predetermined interval, for example, n times, the image display unit 1
Determines that it has not started up yet, and stops access to the image display unit 1.

On the other hand, when the power of the apparatus is turned on, the image display unit 1 sets the terminal unit 2 during a certain period of time as a standby period.
It monitors that a command such as an ID request from the terminal unit 2 is sent. If a command is sent during this time, corresponding control is performed. That is, I
When the D request is sent, the ID is returned.

On the other hand, if no connection request or the like is sent from the terminal unit 2 during this time, a connection request is sent to the terminal unit 2 after the end of the waiting period as shown in FIG. (Attached using the ID as a parameter). The terminal unit 2 constantly monitors the reception of the command sent from the image display unit 1, and requests the transmission of the specifications of the image display unit 1 upon detecting the reception of the connection request. In response to this, the image display unit 1 transmits the specification information of its own device to the terminal unit 2.

The terminal unit 2 requests transmission of necessary adjustment data based on the specifications. Then, the image display unit 1 responds to the transmission request of the adjustment data and transmits the image display adjustment data held in the own device to the terminal unit 2.

The terminal unit 2 can grasp the specifications of the image display unit 1 in this way, and thereafter shifts to a normal process according to the specifications of the image display unit 1.

When the image display unit 1 sends a connection request to the terminal unit 2 a predetermined number of times after the power of the apparatus is turned on, if there is no response from the other party, the image display unit 1 determines that the other party terminal unit has not been started up, and A mode for monitoring reception of command data from the section 2 is entered. Then, the power of the terminal unit 2 is turned on and I
When the D request is sent, the control shifts to control for returning the connection request.

That is, in the present embodiment, communication is basically established with the terminal unit 2 as the master and the image display unit 1 as the slave.

As described above, it has been described that the terminal unit 2 stops the access after trying the connection a predetermined number of times, and issues a connection request from the image display unit 1. However, the terminal unit 2 always keeps accessing regularly and displays the image. The unit 1 may not always voluntarily transmit a command as a slave.

The ID is an identification symbol for specifying the hardware specifications of the image display unit, and is, for example, a maker & model number. The specifications represent hardware specifications of the image display unit 1. For example, the number of pixels of a display panel, a pixel array, color / monochrome, a device type, a screen size, an aspect ratio,
The number of gradations, gamma characteristics, displayable frame frequency, audio specifications, and the like are included. Further, items that can be adjusted in the image display unit are also included in the specifications.

The adjustment data includes, for example, contrast, color balance, brightness, black level, display position, display size, volume, balance, and the like, and may be changed during normal times. Adjustment information is exchanged between the image display unit 1 and the terminal unit 2. Further, the adjustment data also includes information on an adjustment right as to which of the items that can be adjusted by both the terminal unit 2 and the image display unit 1 is adjusted.

As will be described later, the terminal unit 2 stores the ID and the specification of the image display unit 1 already connected in a non-volatile memory (not shown) as a pair. For this reason, when the ID from the image display unit 1 is the same as the previous ID, the terminal unit 2 immediately resumes the normal processing without requesting the transmission because the specifications and the like are already held in the own device. Can be migrated.

In the image display unit 1, the data before the power is turned off is stored in a display unit CPU 10 (not shown) in the image display unit.
1 is stored in a non-volatile memory provided therein, and is read out and reproduced when the power is turned on. Or,
The read adjustment data is transmitted from the image display unit 1 to the terminal unit 2, and the terminal unit 2 and the image display unit 1 perform an adjustment process according to the above-mentioned adjustment right.

The details of the above-described control at the time of power-on will be described with reference to FIGS. FIG. 8 is a flowchart showing control when the power of the terminal unit 2 is turned on in the present embodiment, and FIG. 9 is a flowchart showing control when the power of the image display unit 1 is turned on in the present embodiment.

First, control of the terminal unit 2 will be described with reference to FIG. When the power is turned on, the terminal unit 2 shifts to the control of FIG. 8 and executes the power-on control procedure according to the determined communication control procedure.

First, in step S1 of FIG. 8, an ID request (connection request) command is transmitted to the connected image display unit 1. Then, in subsequent step S2, it is checked whether or not the ID from the image display unit 1 has been received. ID
If not received, the process proceeds to step S3, and it is determined whether or not a predetermined time has elapsed. If the predetermined time has not elapsed, the process returns to step S2, and the reception of the ID within the predetermined time is monitored. If the ID has not been sent from the image display unit 1 after the lapse of the predetermined time, the process proceeds to step S4, and the ID request command is sent to the image display unit 1 for a fixed number of times I
It is checked whether the D request command has been sent, for example, n times.
If it has not been sent a certain number of times, the process returns to step S1 and sends an ID request command again.

On the other hand, if the ID request command has been sent a certain number of times in step S4, the process returns to step S2,
It monitors the ID (connection request) sent from the image display unit 1. When the ID from the image display unit 1 is received, the process proceeds from step S2 to step S5, where the received I
It is checked whether D is an ID already known to the terminal unit 2 and whether the specification of the connected image display unit can be grasped.

If it is not a known display, step S5
The process further proceeds to step S6, and it is checked whether or not the default switch indicating the standard monitor recommended as the standard image display unit of the terminal unit 2 is ON (whether or not the standard monitor is connected). If the monitor is not the standard monitor, the process proceeds to step S7, and a specification request command is transmitted to the image display unit 1. Subsequently, in step S8, it is checked whether or not the specifications from the image display unit 1 have been received. If the specification has not been received, the process proceeds to step S9 to check whether a predetermined time has elapsed. If the predetermined time has not elapsed, the process returns to step S8, and the reception of the specification within the predetermined time is monitored. If the specifications have not been sent from the image display unit 1 even after the lapse of the predetermined time, the process proceeds to step S10, where a request is made a certain number of times, and it is checked whether or not the specifications were not received within the predetermined time. If the request has not been received after a certain number of requests, the process returns to step S7 to transmit the specification request command again.

On the other hand, if the specification has not been received after requesting a predetermined number of times in step S10, the image display unit 1
It is determined that the power supply has been turned off or has become inoperable, and the process returns to step S1 to shift to the process of transmitting an ID request command to the image display unit 1.

On the other hand, when the specification information is received from the image display unit 1 in step S8, the process proceeds to step S11, and it is checked whether the received specification is a specification applicable to the terminal unit 2. If the specifications can be processed, step S15
Proceed to.

On the other hand, if the specifications cannot be processed in step S 11, the process proceeds to step S 12, and the specifications that are considered to satisfy the most received specifications among the specifications applicable in the own terminal unit 2 are selected. Then, in the following step S13, the selected specification information is displayed together with the error display. Then, the process proceeds to step S15.

On the other hand, if the ID indicating the known image display unit is received in step S5,
If it is determined in step S6 that the standard monitor is connected, the process proceeds to step S14, where the determined specification is selected, and the process proceeds to step S15.

In step S15, the specifications of the selected image display unit 1 are stored in a non-volatile memory (not shown), and the flow advances to step S16. In step S16, the image display unit 1 is requested to transmit necessary adjustment data based on the selected specifications. Subsequently, in step S17, it is checked whether or not the adjustment data from the image display unit 1 has been received. If the adjustment data has not been received, the process proceeds to step S18 to check whether a predetermined time has elapsed. If the predetermined time has not elapsed, the flow returns to step S17, and the reception of the adjustment data within the predetermined time is monitored. If the adjustment data has not been sent from the image display unit 1 even after the lapse of the predetermined time, the process proceeds to step S19, and a request is made a certain number of times, and it is checked whether or not the specification has not been received within the predetermined time.
If the request has not been received after a predetermined number of requests, the process returns to step S16, and the adjustment data request command is transmitted again.

On the other hand, if the adjustment data has not been received after requesting a predetermined number of times in step S19, it is determined that the power of the image display unit 1 has been turned off or has become inoperable, and the process returns to step S1. The process proceeds to a process of transmitting an ID request command to the image display unit 1.

On the other hand, when the adjustment data is received in step S17, the specifications of the image display unit 1 can be grasped from the received data, and thereafter, the process shifts to a normal process according to the specifications of the image display unit 1 shown in step S20. I do.

Next, control of the image display unit 1 will be described with reference to FIG. When the power is turned on, the image display unit 1 shifts to the control of FIG. 9 and executes a power-on control procedure (command reception control procedure) according to a determined communication control procedure.

First, in step S31 of FIG. 9, the timer for measuring the communication response time is reset. Then, it is checked in step S32 whether a command has been received.
If the command has not been received, the process proceeds to step S33,
Check whether a predetermined time has elapsed. If the predetermined time has not elapsed, the process returns to step S32, and the reception of the command within the predetermined time is monitored. If the command has not been received from the terminal unit 2 even after the lapse of the predetermined time, the process proceeds to step S34, and a connection request including the ID of the own device is transmitted to the terminal unit 2. Then, the process returns to step S31.

On the other hand, if a command from the terminal unit 2 has been received in step S32, the flow advances to step S35 to analyze the received command. Subsequently, in step S36, it is determined whether or not the analyzed command is an ID request command. If it is an ID request command, step S3
Proceeding to 7, the ID of the own device is returned to the terminal unit 2, and the process returns to step S31.

On the other hand, if the analyzed command is not an ID request command in step S36,
Then, the process advances to step 38 to determine whether or not the received command is a specification request command.
If it is a specification request command, step S39
And returns the specification information of the own device to the terminal unit 2 and returns to step S31.

On the other hand, if the command analyzed in step S38 is not a specification request command, the flow advances to step S40 to determine whether or not the command is an adjustment data request command. If the received command is an adjustment data request command, the process proceeds to step S41, in which the adjustment data of the own device is returned to the terminal unit 2, and the process returns to step S31.

On the other hand, if the command analyzed in step S40 is not an adjustment data request command, the flow advances to step S42 to determine whether or not idle communication (ENQ) is performed. If it is not "ENQ", it is determined that the command is an invalid command that cannot be executed by the own device, and the process proceeds to step S43. It returns to S31.

On the other hand, if the analyzed command is idle communication (ENQ) in step S42, the flow advances to step S44 to return "ENQ" and shift to normal communication processing.

An example of the configuration of a communication packet used for transmission and reception of command data and the like used in the above communication control will be described below with reference to FIG. FIG. 10 is a diagram showing an example of a communication packet configuration used for communication control when the power is turned on in the present embodiment.

In the present embodiment, since the specifications of the partner devices have not been determined, for example, bit synchronization during mutual communication cannot be established. For this reason, it is desirable to perform asynchronous (start-stop synchronization) communication in which a start bit and a stop bit are added before and after the transmission / reception data so that the data can be received in synchronization with each transmission / reception of data.

The communication control procedure is, for example, ISO
1745 or the like can be adopted, SOH 501 indicating the start of the heading of the information message, command data 502 and the number of data 503 constituting the heading, STX 504 indicating the start of the text and the end of the heading, and one set of data corresponding to the item number. The text data group 505 includes an ETX 506 indicating the end of the text, and a checksum (BCC) 507 for checking whether the transmission of the text data has been performed without error.

The command code 502 includes an ID request command, an ID transmission command, a specification request command, a specification transmission command, an adjustment data request command,
An adjustment data transmission command, a channel selection command, and the like are included. If a video printer is further connected, a video print command is included as described later.

This packet configuration can be used not only for power-on control but also for transmission and reception of command data in other normal communications. In this case, when transmitting and receiving a set of an item number and corresponding item data as data to be transmitted as text data, by controlling to transmit and receive only data items having a change in the data items, the amount of transmitted / received data is reduced. Can be reduced.

In this case, a confirmation packet indicating that the update data item from the partner device has been received, for example, “AC
It is necessary to control the transmission of the change item data to be completed only after receiving the "K" packet.

In the above description, an example in which item data corresponding to a data item number is transmitted as text data has been described. However, the present invention and the present embodiment are not limited to the above examples, and are, for example, fixed-length packets whose packet length is uniquely determined by a command code,
In the case where all items are transmitted even if only one item is changed, communication of command data may be performed using fixed-length packets shown in FIG.

In this case, as compared with the case of FIG. 10, the number of data 503 becomes unnecessary, and if the order of the items is determined, the transmission of the item number becomes unnecessary. Therefore, SOH 511, command code 512, STX 514, data 515, ETX
516 and a checksum (BCC) 517.

When the power ON process is completed as described above, the process shifts to a normal communication process. In the normal processing, the communication speed of each other, the synchronization signal (VSYNC, HSY) between each other
Since the transmission / reception timing of (NC) is uniquely determined, thereafter, various communication controls are performed in accordance with the synchronization signal.

The basic data communication format of this embodiment will be described with reference to FIGS. FIG. 12 is a diagram showing a data configuration in a unit cycle according to the present embodiment, and FIG. 13 is a diagram showing an example of a packet configuration when transmitting and receiving command data. In the example of FIG. 13, a fixed-length packet will be described. FIG. 14 is a diagram showing a format example of the adjustment data.

In the present embodiment, image data and audio data are communicated in a unit cycle shown in FIG. This unit cycle is the horizontal synchronization signal (HSYNC) of the video signal.
This is the period or the period of the vertical synchronization signal (VSYNC).

The unit cycle is the first synchronization code (H number)
601; second n image data (serial) 602;
The third sound data 603 and the fourth command data (bidirectional control) 604 are used.

The detailed packet structure of the fourth command data 604 can be, for example, the structure shown in FIG.
Header section 65 indicating what command data it is
1, a data area 652, and a checksum 653.

FIG. 14 shows an example of adjustment data as an example of the configuration of this data section. FIG. 14A shows an example of adjustment data from the image display unit 1 to the terminal unit 2, and FIG.
5 is an example of adjustment data for the image display unit 1.

The adjustment data from the image display unit 1 to the terminal unit 2 includes display type data, a command indicating an adjustment mode, a command indicating an adjustment right, contrast setting data, color temperature setting data (G, B, R), Brightness setting data, black level setting data (G, B, R), gamma adjustment data (G, B, R), display mode setting data, horizontal / vertical display size setting data, horizontal / vertical display position setting data, volume setting Data, volume left / right balance setting data, display unit audio specification setting data, and the like.

On the other hand, the adjustment data from the terminal unit 2 to the image display unit 1 includes received signal type data, a command indicating an adjustment mode, a command indicating an adjustment right, contrast setting data, and color temperature setting data (G, B, R), brightness setting data, black level setting data (G, B, R), gamma adjustment data (G, B, R), display mode setting data, horizontal / vertical display size setting data, horizontal / vertical display position setting data , Volume setting data, volume left / right balance setting data, and the like.

Next, the setup process executed first in the normal processing operation mode of the present embodiment in which the above power-on process has been completed will be described below with reference to the flowcharts of FIGS. FIG. 15 is a flowchart showing a setup process of the operation mode of the terminal unit 2 in the present embodiment, and FIG. 16 is a flowchart showing a setup process of the operation mode of the image display unit 1 in the present embodiment.

When the terminal unit 2 receives the specification information and the adjustment data of the connected image display unit 1 by the power-on process shown in FIG. 8, the process proceeds to the operation mode setup process shown in FIG. First, in step S51, the terminal CPU 20
1 determines an input signal based on input signal determination data from the input I / F section 220. Subsequently, in step S52, specific data of the image display unit 1 is acquired based on the adjustment data and the like.

Then, in the following step S53, the image processing mode is determined from the acquired data, and the audio processing mode is specified. For example, if the image processing mode is NT
Specify the SC processing mode, and set the audio processing mode to the stereo mode.

Next, in step S54, control is performed so as to generate a timing signal at a signal processing timing corresponding to the processing mode determined by instructing the timing generation unit 204.

In step S55, a communication (transmission) processing timing is generated.
03, the communication direction control timing, the timing of generating an interrupt signal to the terminal CPU 201 for command transmission / reception, the video signal processing unit 205 and the audio signal processing unit 2
10 and an enable signal for time-division multiplexing of each processing data such as a command data processing timing by the terminal CPU 201 are set so as to perform the communication control shown in FIG. Then, data communication is performed according to this processing timing.

On the other hand, in the image display unit 1, when the specification information of the image display unit 1 is transmitted to the connection terminal unit 2 by the power-on process shown in FIG. 9 and the adjustment data and the like are shared, the operation mode setup shown in FIG. Move on to processing. First, in step S61, the display unit CPU 101 determines an operation mode of the timing generation unit 104. Then, it monitors that the display modem 103 detects the synchronization signal from the terminal unit 2 at the timing according to the determined operation mode.

When the display modem 103 receives the synchronization signal from the terminal unit 2, a reproduced SYNC signal and a reproduced CLK signal are output. For this reason, the terminal unit 2
When the synchronization signal is received, the process proceeds from step S62 to step S63 to generate a transmission processing timing. For example, each of a communication direction control timing to the display modem 103, an interrupt signal generation timing to the display CPU 101 for command transmission / reception, a command data processing timing by the video signal processing unit 105, the audio signal processing, and the display CPU 101, etc. An enable signal for time division multiplexing of the processing data is generated.

In step S64, a signal processing timing is generated to control the received video signal and the like to a receivable state.
It controls reception of audio signals (sound signals) and transmission and reception of command data.

When the setup process is completed as described above, the terminal unit 2 performs data communication with the image display unit 1 in synchronization with the synchronization signal sequentially in response to the generation of display data from the input I / F 220. Will be.

An example of data communication timing between the terminal unit 2 and the image display unit 1 when an image in the NTSC format is input to the input I / F 220 and the display panel 110 of the image display unit 1 is 852 dots × 480 dots. This will be described below with reference to FIGS. FIG. 17 is a diagram showing an example of data communication control timing within a vertical synchronizing signal generation cycle between the image display unit 1 and the terminal unit 2 of the present embodiment, and FIG. FIG. 4 is a diagram illustrating an example of data communication control timing within a horizontal synchronization signal generation cycle with a terminal unit 2;

In this embodiment, as shown in FIG. 17, valid video data is transmitted at the timing described above in synchronization with the VSYNC signal and the HSYNC signal. In the present embodiment, the display panel 110 has 852 dots ×
Since it is 480 dots, 480 lines of video data are transmitted and received between VSYNC signals.

In the present embodiment, the DIR signal for controlling the communication direction is set to a high level except for a certain period immediately before the VSYNC signal output timing, and the communication direction control of the command is performed by the terminal unit 2 to display the image from the terminal unit 2 in principle. The transmission direction to the unit 1 is set.

As a specific command transmission / reception timing, VSYN
Utilizing the fact that there is no valid video data transmission timing before and after the C signal, the VSYNC signal output timing is used as the actual command transmission timing from the terminal unit 2 to the image display unit 1 at the VSYNC signal timing shown in FIG.
A transmission command enable signal is output at a predetermined timing between SYNCs. Note that the example of FIG. 17 shows an example in which commands for two blocks are transmitted.

Further, the command transmission timing from the image display unit 1 to the terminal unit 2 is set to a predetermined timing during two cycles of HSYNC immediately before the VSYNC signal timing, and a reception command enable signal is output. Note that, in the image display unit 1, the transmission / reception enable timing is the reverse timing of FIG.

The data transmission timing between HSYNCs is as follows.
As shown in FIG. 18, L-channel audio data and R-channel audio data are transmitted and received using the period from the HSYNC signal timing to the video data communication timing. Then, when the video data valid timing comes, image data of 852 dots for one line in the horizontal direction is transmitted and received.

As described above, in the present embodiment, VSYN
Video data and audio data (audio data) to be displayed between the C signals can be multiplexed and transmitted and received, and if necessary, command data can also be multiplexed and transmitted and received.

By the above processing, various control timings to be executed by the terminal unit of the present embodiment are determined. Details of the adjustment control according to the specific specifications of the image display unit 1 will be described below.

The transmission format is determined by characteristic data (resolution, pixel arrangement, screen aspect, refresh rate) of the display panel 110. Further, the horizontal cycle is determined by setting (the number of display lines + necessary blanking period) during the refresh rate (vertical synchronization frequency). For example, 480 display lines in 60 Hz, blank period 4
It decides to use five or the like.

When the input signal format is the same, the output can be performed without performing any special conversion processing. However, if a large amount of command data (control signal) needs to be communicated here, the blank period may be increased.

Further, in one horizontal cycle, (the number of display pixels +
Multiplexed audio data + required blanking period)
Is calculated, and the frequency of the master CLK is determined. Here, if the input signal format is the same, the CLK signal of the input information can be used as it is. However, if there are many blank periods in the input format and it is desired to lower the frequency, the input CLK signal must be changed as necessary.

Further, the arrangement of the video data / audio data during the horizontal period and the arrangement of the video data / control signal data during the vertical period are determined, and the terminal unit 2 sends the determined contents to the image display unit as necessary. Send as data,
Recognize each other and share the recognition result.

In determining the refresh rate, if the refresh rate characteristic of the image display unit 1 is sufficiently high, the refresh rate is adjusted to the refresh rate of the input signal to the input I / F 220. However, the user I / F 23
When the user requests to increase the refresh rate by an instruction such as 0 or 130, the refresh rate may be increased. For example, when the flicker characteristic is improved / interlacing is changed to progressive, or the like.

Further, when the screen aspect ratio of the display panel 110 does not match the aspect ratio of the input signal to the input I / F 220, the display mode can be changed by automatic discrimination or at the request of the user. I have.

The transmission specifications are determined in this manner. In the present embodiment, an example in which the transmission specifications are changed according to the specifications of the display panel 110 of the image display unit 1 connected to the terminal unit 2 will be described below. Will be described.

The display panel 110 has 852 dots × 480.
FIG. 19 shows an example in the case of a dot (R, G, B stripe). In this case, as shown in FIG. 19, the vertical synchronization (VSYNC) frequency is set to about 60 Hz, and 1 VSYNC is used.
525 HSYNC signals are generated during the period, and 480 HS clocks from the 36th from the generation of the VSYNC signal are generated.
The YNC period is an effective video data period.

The horizontal synchronization signal (HSYNC) has a frequency of 3
1.5 KHz, clock signal (CLK signal) has frequency 3
3.1 MHz, which is 1052 in one HSYNC period.
CLK signals are generated, and video data is communicated by 852 of the 126th from among the generation of the HSYNC signal.

The display panel 110 is 640 dots ×
FIG. 20 shows an example in the case of 480 dots (R, G, B stripes). In this case, as shown in FIG. 20, the vertical synchronization (VSYNC) frequency is set to about 60 Hz, and 1 VSY
525 HSYNC signals are generated during the NC period, and 480 HSYNC periods from the 36th HSYNC signal after the VSYNC signal generation are set as the effective video data period.

The horizontal synchronization signal (HSYNC) has a frequency of 3
1.5 KHz, clock signal (CLK signal) has frequency 2
At 4.9 MHz, 790 CLK signals are generated during one HSYNC period, and video data is communicated to 640 of the 95th clock signal from the generation of the HSYNC signal.

FIG. 21 shows an example in which the display panel 110 has 1365 dots × 768 dots (R, G, B stripes). In this case, as shown in FIG. 21, the vertical synchronization (VSYNC) frequency is About 60Hz, 1VS
807 HSYNC signals are generated during the YNC period, and 768 of the 768 HSYNC signals from the 31st HSYNC signal are generated from the generation of the VSYNC signal.
Is an effective video data period.

The horizontal synchronization signal (HSYNC) has a frequency of 4
8.4 KHz, clock signal (CLK signal) has frequency 8
1.5 MHz, which is 1885 in one HSYNC period
CLK signals are generated, and the video data is communicated by 1365 of the 201th from among the generation of the HSYNC signal.

When the image display unit 1 has a memory for temporarily storing video data transferred therefrom,
In this manner, the display timing of the display panel 110 and the video data transfer timing do not necessarily have to coincide with each other. For example, as shown in FIG. 22, the frequency of the blanking time horizontal transfer clock (CLK) is changed to make the transfer slower. You may. For example, as shown in FIG.
The frequency of the clock signal (CLK signal) may be set to 67.8 MHz so that 1365 dots of video data can be transferred during the HSYNC period so that 1400 CLK signals are generated during the period.

When the transfer rate is reduced, noise becomes stronger, and a decrease in display image quality can be effectively prevented. Further, the terminal unit 2 of the present embodiment determines the processing specification of the audio signal based on the speaker specification of the image display unit 1.

For example, if the image display unit 1 has only one speaker 123 in monaural specification, the audio data is data for one channel.

On the other hand, when the image display unit 1 has two speakers 123 and the audio amplifier 122 has an independent two-channel amplifier circuit for each speaker, the left (L) right (R) stereo audio data. Further, when the data is multi-channel surround data, it is determined that audio data for a necessary channel is transferred according to the surround specification.

When the input signal to the input I / F 220 is a digital input, asynchronous audio is synchronized and horizontally multiplexed. Alternatively, the communication audio data can be changed in accordance with a user request (for example, a user wants to hear a main sound from left and right speakers).

The specific processing method of the video data is also determined according to the specific data of the image display unit. For example, in accordance with the characteristic data of the display panel 110, the quantization precision is determined so that the number of gradations matches the display gradation.

The gamma (γ) characteristic of the display device is subjected to processing such as non-linear conversion so that the gamma (γ) characteristic of the display device matches the light emission characteristic of the display panel 110 in addition to the number of gradations. For example, when the light emission luminance is controlled by PWM modulation, a linear characteristic is obtained. Therefore, control such as performing only inverse γ is performed.

As for the color temperature of the display device, since the reproduced white color temperature differs depending on the specifications of the display unit, the R / G / B balance is adjusted so as to obtain a desired color temperature. Change the enhancer to be optimal for the screen size and resolution. The processing changes depending on the input signal or the user's request.

Similarly, when the resolution, the pixel arrangement, the display aspect, the refresh rate, and the format of the input signal are different from the transmission format, the resolution is converted so as to be suitable.

The user I of the present embodiment described above
The / Fs 130 and 230 can be adjusted by inputting instructions on image quality adjustment and sound adjustment to an operation panel provided in the apparatus, and can be remotely operated by, for example, a system remote controller.

That is, the user adjustment data (remote control or key switch operation) is shared by the terminal unit 2 and the image display unit 1, and the operation input result is shared with each other by transmitting and receiving the command data, so that the user request can be made to which user request. Is also configured to be able to cope. That is, in the communication command data of this embodiment, the operation input result (remote control or key switch operation) for any user I / F is controlled so as to be transferred to each other. However, it can be controlled in exactly the same way.

For example, the user I / F 13 of the image display unit 1
A tuning operation of the tuner unit 240 of the terminal unit 2 is also possible by inputting an instruction for 0.

However, in the present embodiment, the image display unit 1
According to the specifications of the video signal processing unit 10 of the image display unit 1.
5 or should it be adjusted by the panel drive unit 106?
Alternatively, the video signal processing unit 205 of the terminal unit 2 previously determines whether it is better to make adjustments, and gives the right of adjustment to the one determined to be optimal. That is, when the terminal unit 2 and the image display unit 1 have the same adjustment function, the data for determining which one performs the adjustment is exchanged, and the optimum adjustment is performed.

An example of the result of the distribution of the adjustment right according to the present embodiment is shown below.

The terminal 2 adjusts the contrast.

Color adjustment is performed by the terminal unit 2.

The color temperature is adjusted by the image display unit 1.

The image display unit 1 adjusts the volume.

The enhancer adjustment is performed by the terminal unit 2.

In the distribution of these adjustment rights, an adjustment right is given to a person who can easily make an adjustment for obtaining an optimum result or a person who can obtain a better result. When an adjustment instruction having no adjustment right is detected, the detection result of the adjustment instruction having the adjustment right is transferred to at least the other party at the transmission timing of the command data without performing the adjustment in the own device.

If the instruction is an adjustment instruction having an adjustment right for the apparatus, the adjustment result may be transferred to the other party after the adjustment is performed in the apparatus itself.

[Modification of First Embodiment] In the first embodiment described above, video data,
As shown in FIGS. 17 and 18, multiplexing of audio data (audio data) and command data
The example in which the SYNC signal is multiplexed between the video data valid timings and the command data is multiplexed between the VSYNC signals between the HSYNCs outside the video data valid period has been described.

However, the present invention is not limited to the multiplex timing described above. For example, instead of dividing audio data into timings for each HSYNC and communicating, audio data is collectively communicated for each VSYNC timing. May be controlled as follows.

As described above, the audio data is not divided and transmitted at the timing of each HSYNC.
FIG. 2 shows an example of a communication timing between the terminal unit 2 and the image display unit 1 when control is performed such that communication is performed collectively at each C timing.
3 is shown.

In the example shown in FIG. 23, audio data is communicated collectively at HSYNC timing between video data valid timings after the arrival of the VSYNC signal.

Such communication timing is effective when the image display unit 1 is provided with a memory capable of temporarily storing audio data.

Further, in the first embodiment described above, an example has been described in which command data is multiplexed between HSYNCs outside the video data valid period between VSYNC signals. However, the present invention is not limited to the multiplexing timing described above.
The communication may be controlled so as to be divided at the timing of each SYNC.

As described above, the command data is not communicated collectively at the timing of each VSYNC.
FIG. 2 shows an example of the communication timing between the terminal unit 2 and the image display unit 1 when the communication is controlled so as to be divided for each C timing.
It is shown in FIG.

In the example shown in FIG. 24, after the communication timing of audio data is completed, the command data is communicated by dividing it into, for example, one word at a time between video data valid timings. In this case, several HS
One packet of command data is transmitted in the YNC period.

Such communication timing is used for communication of command data that needs to be communicated urgently or for communication of a small amount of communication command data such as only data to be changed among various data. Suitable for.

Further, in the example shown in FIG. 17, the communication timing of the command data is, for example, two times of the HSYNC period and the VSYNC signal arrival period immediately before the arrival of the VSYNC signal. However, the present invention is not limited to the above example, and the command data may be controlled so that the command data can be communicated in all periods except the video data valid period and the audio data communication period. FIG. 25 shows an example of the communication timing between the terminal unit 2 and the image display unit 1 in the case of performing the control as described above.

In the example shown in FIG. 25, the command data is
The required number of transmissions can be performed at once in the SYNC period. This is effective when not only the change information but also all information is communicated as command data.Even if a communication error occurs or a packet is discarded, the effect is minimized. Can be minimized.

[Second Embodiment] In the first embodiment described above, one image display unit is connected to the terminal unit 2 and nothing is connected to the image display unit 1. Not explained examples. However, the present invention is not limited to the above-described example, and an image displayed on the image display unit by connecting another optional device, for example, a video printer or the like to one terminal unit or the image display unit. You may comprise so that a hard copy of data etc. can be performed. In addition,
Since the configuration of the second embodiment is the same as that of the first embodiment except for the configuration described below, detailed description of such portions will be omitted.

A second embodiment according to the present invention in which another optional device, for example, a video printer or the like is connected to one terminal unit or image display unit, will be described below with reference to FIGS. 26 to 28. I do. In the second embodiment,
The same reference numerals are given to the same components as those in the first embodiment described above, and the detailed description will be omitted. Also in the second embodiment, transmission and reception of various data between the image display unit 1 and the terminal unit 2 are the same as in the first embodiment.

FIG. 26 is a diagram for explaining an example of a basic system configuration according to the second embodiment of the present invention. FIG.
As shown in FIG. 6, in the second embodiment, the terminal unit 800 performs necessary conversion processing on the input signal in accordance with the specifications of the image display unit 1000, and performs image conversion on the image display unit 1000 via the connection unit 900. Output to

The image display unit 1000 displays the optional device 1
The terminal unit 800 can transfer data to the optional device 1100 via the connection unit 900 and the image display device 1000.

Further, in the example of FIG. 26 described above, the optional device 1100 is connected to the image display unit 1000. However, the optional device can also be connected to the terminal unit 800 of the second embodiment. The configuration shown in FIG. 27 may be adopted. In the following description, an example in which optional devices can be connected to both the terminal unit 800 and the image display unit 1000 will be described. However, the present invention is not limited to the above example. Alternatively, it is needless to say that a case where optional equipment can be connected to only the terminal unit 800 is also included in the present invention.

FIG. 28 shows a detailed configuration example of the second embodiment shown in FIG. 26 or FIG. FIG. 28 is a block diagram showing a detailed configuration of the second embodiment. FIG.
In FIG. 8, FIG. 2 showing the first embodiment described above
The differences from the configuration shown in FIG.

In the image display unit 1000, in addition to the configuration shown in FIG.
A dedicated connection line for the optional device 1100 is connected, and a signal from this dedicated connection line is input to the external modem 651. The external modem 651 demodulates the signal from the terminal unit 800 and outputs it to the external I / F 653.
The signal from the external I / F 653 is the external modem 651
And output to the dedicated connection line.

An external timing generator 652 is provided, and an external I / F is controlled by the display CPU 101.
Terminal unit 8 using the external modem 651
Communication control with 00 is performed.

The external I / F 653 is connected to the external input / output terminal 65.
4 and an interface with an optional device 1100, for example, a video printer device.

On the other hand, in the terminal unit 800, the signal processing unit 601 realizes both functions of the video signal processing unit 205 and the audio signal processing unit 210 shown in FIG. The terminal modem A203 implements the same function as the terminal modem of FIG. On the other hand, the terminal modem B 602 is a terminal modem used for communication with the optional device 1100 connected to the image display unit 1000.

The timing generator A603 realizes the same function as the timing generator 204 shown in FIG. The timing generation unit B 606 receives a clock signal and a synchronization signal from the timing generation unit A 603 according to the control of the terminal CPU 201, and outputs a control timing signal of the terminal modem 602 or the D / A converter 607 by synchronizing the clock signal and the synchronization signal as necessary. I do.

The D / A converter 607 does not output data with the optional device 1100 like a video printer, but inputs data from the optional device 1100 via the external I / F 653 and the external modem 651 to the terminal unit. A D / A converter provided for the case where data is sent at 800, performs D / A conversion on data output from the terminal modem B 602, and outputs the data to the terminal output terminal 609.

Alternatively, an output signal from the D / A converter 607 can be sent to the image processing unit 1000 via the signal processing unit 601 and the terminal modem A203 via the selector 608.

Also in the second embodiment having the above configuration, when the terminal unit 800 and the image display unit 1000 are powered on and the optional device 1100 is also powered on, the terminal unit 800 and the As with the power-on process shown in FIGS. 8 and 9 of the first embodiment described above, the I / O
D, specifications, and adjustment data are shared, and the terminal modem B 602 and the external modem 6 are shared in the same manner as in FIGS.
The data transmission specifications for the necessary optional devices are determined by determining the data transmission specifications between the devices 51.

When the optional device 1100 is a video printer, it outputs video data to be printed out or print data for the optional device.

Although the example in which the optional device 1100 is a video printer has been described above, the present invention is not limited to this, and may be a video output device such as a video deck. In this case, a video signal from the optional device 1100 is input to the external input / output terminal 654 and the external I / O
F653, data is transmitted to the terminal unit 800 via the external modem 651.

On the other hand, the terminal unit 800 is connected to the terminal unit modem B6.
02 is converted into the same format as that input to the external input / output terminal 654 of the image display unit 1000 by the D / A converter 607, and is output to the external output terminal 809 of the terminal unit 800. For example, the image display unit 1000
When the external input / output terminal 654 and the external output terminal 609 of the terminal unit 800 include an RCA pin jack connector and a DV connector, the signal is output from the terminal unit 800 in a signal format indicated by the connector used for the input of the image display unit 1000. .

The signal input to the external input / output terminal 608 of the image display unit 1000 is transmitted to the terminal unit 800, and the signal processing unit 601 performs signal processing on the terminal unit 800 side so as to meet the specifications of the image display unit 1000. And the terminal modem A203
Can be sent back to the image display unit 1000 again.

[Third Embodiment] In the second embodiment described above, the optional device 1100
In connection with the above, an example in which a dedicated modem and a connection line are provided for the optional device 1100 has been described. However, if the optional device is a device that does not need to send and receive a large amount of information in real time, such as when the optional device is a video printer, a modem dedicated to the optional device 1100 is not necessarily required.
And connection lines need not be provided.

For example, even when an optional device is connected to the image display unit, control is performed such that information for the optional device is multiplexed and communicated using the idle time of information communication between the terminal unit and the image display unit. Good.

As described above, even when the optional device is connected to the image display unit, the multiplexing is performed so that the communication between the optional device and the terminal unit is performed during the idle time of the communication between the terminal unit and the image display unit. A third embodiment according to the present invention will be described with reference to FIGS. 29 and 30. In addition,
The configuration of the third embodiment is the same as that of each of the above embodiments except for the configuration described below, and a detailed description of such portions will be omitted.

In the third embodiment, FIG. 29 is a block diagram showing the configuration of the third embodiment according to the present invention, and FIG. 30 explains the information communication timing of the third embodiment. FIG.

Also in the third embodiment shown in FIG. 29, the basic configurations of the terminal section and the image display section can be handled by the same configurations as those in the first embodiment shown in FIG. Then, in the third embodiment shown in FIG.
The following configuration is added to 400 or the image display unit 1500 in addition to the configuration of FIG.

That is, the image display unit 1500 includes an external I / F 1410 that controls an interface with the optional device 1100 and receives communication data from the display unit modem 103 to the optional device 1100. Also, the external I / F 15 that controls the interface with the optional device 1100 by the terminal unit 1400 and receives communication data from the terminal modem 203 to the optional device 1100.
10 is provided.

The input / output timing from the terminal modem 203 (from the display unit modem 103) is controlled to be the timing shown in FIG.

The control timing shown in FIG. 30 is different from the control timing of the first embodiment shown in FIG. 17 in that the terminal modem of terminal unit 1400 is used to newly multiplex information for optional equipment 1100. The transmission command enable signal 203 is transmitted to the image display unit 1500 at the HSYNC period shown in FIG. 30A and the command data reception timing from the image display unit 1500 when the DIR signal is at a low level, and valid video data communication. Control is performed such that data is transmitted to the optional device 1100 using the period shown in FIG.

For example, when the optional device 1100 is connected to the image display unit 1500, the timing generator 104 sends the external I / F 1510 to the external I / F 1510 from the display unit modem 103 at the timing shown in FIG. It receives the demodulated data and outputs a timing signal for sending to the optional device 1100.

For example, in the example shown in FIG. 30, a period of about 20 lines can be secured in (B), and if 20 lines are transmitted at about 60 Hz, data of one frame can be transmitted in less than one second. . When the data is divided and transmitted in this way, it is desirable to add a line number to the beginning each time one line of data is transmitted so that it is possible to determine how far the data has been transmitted.

If the image display unit is provided with a separate frame memory, the data transferred for this optional device is written in this frame memory, and when all the data are ready, the connection option Control may be performed so that the data is transferred to the device. Alternatively, when the display data on the own display screen is held as frame data, a command to output the held data to the optional device may be received from the terminal unit.

By providing the frame memory for external output in the image display unit in this manner, it becomes possible to output information in accordance with the specifications of the optional devices connected to the image display unit, and the restrictions on the connected optional devices are greatly reduced. And can be made highly versatile.

Further, upon receiving the command data transmission request from the optional device 1100, the external I / F 1510 instructs the display unit CPU 101 to set the command data transmission timing from the optional device 1100 during the period (B). Alternatively, the command data from the optional device 1100 is mixed with the transmission during the command data transmission period from the image display unit 1500 to the terminal unit 1400 and then transmitted. For example, in this case, control is performed such that the ID of the optional device 1100 is included in the header portion so that it is possible to determine the transmission source.

Further, the optional device 1 is connected to the terminal 1400.
100 is connected, the timing generator 204
When the timing shown in FIG. 30B is reached, the external I / F 1410 receives the demodulated data from the terminal modem 203 and outputs a timing signal for sending it to the optional device 1100.

Upon receiving a command data transmission request from the optional device 1100, the external I / F 1410 instructs the terminal CPU 201 to issue a command data transmission request.
Requests reception of command data from 0.

By controlling as described above, it is possible to control the optional equipment without providing a modem for the optional equipment.

[Fourth Embodiment] In each embodiment described above, an example in which one image display unit is connected to the terminal unit 2 has been described. However, the present invention is not limited to the example described above, and the present invention includes a case where a plurality of image display units can be connected to one terminal unit. Further, it goes without saying that connecting the optional devices described in the second or third embodiment to them is also included in the present invention.

A fourth embodiment according to the present invention in which a plurality of image display units can be connected to the terminal unit will be described below with reference to FIGS. The configuration of the fourth embodiment is the same as that of each of the above-described embodiments except for the configuration described below, and a detailed description of such portions will be omitted.

FIG. 31 is a block diagram showing the configuration of the fourth embodiment according to the present invention. FIG. 32 shows the control of communication between the terminal unit and the image display unit in the VSYNC cycle according to the fourth embodiment. FIG. 33 is a timing chart for explaining communication control between the terminal unit and the image display unit in the HSYNC cycle according to the fourth embodiment.

First, the overall configuration of the fourth embodiment will be described with reference to FIG. In FIG. 31, 1600 is a terminal unit to which two image display units can be connected, 1700 is an image display unit A, and 1800 is an image display unit B. Image display section A1
700 and the image display unit B1800 may have the same configuration. FIG. 31 shows the detailed configuration of only the image display unit A1700.

The configuration of the image display unit A1700 is the same as that of the image display unit 1 shown in FIG. 2 described above, and the same reference numerals are given to each configuration.

The terminal unit 1600 includes two image display units 17
Since the display information needs to be transmitted to the image display devices 1700 and 1800, a configuration for communication with the image display devices 1700 and 1800 is provided.

The image display unit A1700 includes a terminal modem A1602, a signal processing unit A1604, and a timing generation unit A1606. The image display unit B1800 includes a terminal modem B1603, a signal processing unit B1605, and a timing generation unit B1607. And the terminal CPU 1601
Performs the same control on the image display units 1700 and 1800 as the above-described control on the image display units of the first embodiment.

That is, the terminal CPU 1601 performs power-on processing shown in FIGS. 8 and 9 with the respective image display units 1700 and 1800, and then performs setup processing of the operation mode shown in FIGS. It performs specification determination processing and the like.

When a common image is displayed on each image display unit and a common sound output is performed, the operations of the signal processing unit and the timing generation unit are shared by the image display units using a common input source. Just match it. On the other hand, when trying to display a completely different image on each image display unit, the input signal of the input I / F 220 may be appropriately distributed. Alternatively, the tuner unit 240 may be configured to have a double tuner configuration and display an independent television broadcast for each image display unit.

Even in such a case, the adjustment data is shared for each image display unit, and the user I / F on the image display unit side is used.
Since the user's instruction can be applied to, for example, the tuner unit 240 of the terminal unit, the control can be performed without any special configuration or operation.

The user I / F 23 of the terminal unit 1600
If the remote controller input detection mode to 0 is configured to be detectable for two types of remote controllers, and if the respective detection modes are assigned to the respective image display units, remote control for the terminal unit is also possible.

When an optional device can be connected to each image display unit or terminal unit, the configuration for the optional device shown in FIG. 29 is added to the configuration shown in FIG. 31, for example, as in the case of FIG. May be controlled. Alternatively, the configuration shown in FIG. 28 may be added to each image display unit or terminal unit.

An example of communication control timing between the terminal unit 1600 and the image display units 1700 and 1800 according to the fourth embodiment having the above configuration will be described with reference to FIGS. 32 and 33.

First, the communication control of the VSYNC cycle (vertical cycle) according to the fourth embodiment will be described with reference to FIG. The terminal unit 1600 according to the fourth embodiment has, for example, V
In the first HSYNC cycle (horizontal cycle) when the SYNC (vertical cycle) VSYNC signal arrives, for example, the image display unit A17
00, a transmission command enable signal for permitting command transmission to the image display unit B1 is output in the next HSYNC cycle.
The transmission command enable signal for permitting the transmission of the command to the command 800 is output.

Then, a reception command enable signal for permitting command reception from the image display unit A1700 is output in a predetermined HSYNC cycle after the end of valid video data transmission timing, and the image display unit B180 is output in the subsequent HSYNC cycle.
It outputs a receive command enable signal that permits command reception from 0. Thereby, the terminal CPU 1601
Can continuously process command communication with the image display units 1700 and 1800 without overlapping each other.

Next, the communication control of the HSYNC cycle (horizontal cycle) of the fourth embodiment will be described with reference to FIG.

In the example of FIG. 33, the upper part is the image display unit A17.
00 of the first embodiment is a display panel 1100 of FIG.
9, an audio signal for two channels is sent to the L / R two-channel stereo speaker at 852 dots × 480 dots. The lower part of FIG. 9 shows the display panel 1100 of the image display unit B1800 in the first embodiment. This is an example in which acoustic signals for four channels are transmitted to a four-channel speaker at 640 dots × 480 dots described in FIG.

Since the terminal unit 1600 has only one terminal CPU 1601, communication of command data with each image display unit is controlled so that communication timings do not overlap as shown in FIG. The generating unit is provided for each image display unit. Therefore, the terminal unit 1600 of the fourth embodiment can perform video data communication with completely different communication specifications for each image display unit without error.

As described above, according to the fourth embodiment, a plurality of image display units can be connected to the terminal unit, and even if the image display units have different display specifications, a special configuration is provided. It is possible to transmit display data and audio data with transmission specifications suitable for each image display unit without any.

[Fifth Embodiment] In the fourth embodiment described above, the terminal unit 2 is provided with an information communication modem for each of two connected image display units. Was explained. However, the present invention is not limited to the above-described example, and one image display unit can be connected to the terminal unit, and another image display unit or the like can be connected to the image display unit. The configuration is also included in the present invention.
Further, it goes without saying that connecting the optional devices described in the second or third embodiment to them is also included in the present invention.

The fifth embodiment according to the present invention in which the terminal unit is configured to be able to control a plurality of image display units via the image display unit, and to be able to connect another image display unit and the like to the image display unit. An embodiment will be described below with reference to FIGS. Note that the fifth embodiment is the same as the above-described embodiments except for the configuration described below.
A detailed description of such portions is omitted.

FIG. 34 is a block diagram showing the configuration of the fifth embodiment according to the present invention, FIG. 35 is a diagram for explaining the packet configuration used in the fifth embodiment, and FIG. FIG. 37 is a diagram for explaining a detailed configuration of the address command shown in FIG. 37, FIG. 37 is a diagram showing a state in which a plurality of image display units are connected in the fifth embodiment, and FIG. It is a flowchart for explaining.

In the fifth embodiment described below, the hardware configuration is simplified as much as possible, and the communication control procedure is changed so that many image display units can be connected to one terminal unit.

[0220] For this reason, the terminal unit 2000 uses the first
A hardware configuration similar to that of the third embodiment or a configuration similar to that of the third embodiment may be used. In the case of a configuration similar to that of the third embodiment, the external I / F
, An optional device, for example, a printer device can be connected.

On the other hand, the image display section is different from the image display section 1 of the first embodiment shown in FIG. 2 in that a driver circuit 150 is newly provided. The display unit is configured to be connectable.

Note that, as with the image display unit A2200, the external I / F 151 similar to that of the third embodiment may be provided so that optional devices can be connected to the image display unit. Further, the terminal unit is not the configuration shown in FIG.
Needless to say, it may have the same configuration as the terminal unit 1600 of the fourth embodiment shown in FIG. In this case, the transmission control procedure described later can be applied.
Therefore, in the following description of the transmission control procedure, a case where two image display units can be connected to the terminal unit and a printer is connected to the image display unit as an optional device will be described as an example.

[0223] In the fifth embodiment, the image display section comprises:
Only the control of transferring the communication data from the terminal unit to the next image display unit via the driver circuit 150 is performed, so that the detailed description of the hardware is omitted.

However, since the communication data output from the terminal unit 2000 is to be received by the modem units of all the connection devices, each receiving side has a configuration for determining whether or not the data is addressed to itself. .

Therefore, in the fifth embodiment, FIG.
The packet having the configuration shown in FIG. 5 is used for communication. The packet configuration shown in FIG. 35 is different from the packet configuration shown in FIG. 10 or FIG.
1 and the sending address 532 are newly added.

The detailed structure of the address section shown in FIG. 35 is shown in FIG.
6 is shown. In each of the embodiments described above, the video data has 24 bits as described above, but the command data has a 16-bit configuration.

For this reason, in the fifth embodiment, this 1
The 6-bit command data is divided into the upper 8 bits and the lower 8 bits.
The data is divided into bit parts, and the upper 8 bits are used as address data for specifying a device directly connected to the terminal unit 2000 (corresponding to the image display unit A2200 and the image display unit B2100 in the example of FIG. 34).

Then, the device whose lower 8 bits are specified by the upper 8 bits is hanging (the optional device 110 connected to the image display unit A2200 in the example of FIG. 34).
(Equivalent to 0).

The transmission control from the terminal unit to each connected device using the command communication packet will be described below with reference to the flowchart in FIG. Note that, for ease of explanation, the flow chart of FIG. 38 will be described using the case of the connection state shown in FIG. 37 as a specific example.

In FIG. 37, reference numeral 2500 denotes a two-port terminal having the same configuration as the terminal 1600 shown in FIG. 31, reference numeral 2600 denotes a display A having the same configuration as the image display A2200 in FIG. For example, a printer 2700, which is an optional device connected via the external I / F 151, is a display unit B connected to the driver circuit 150 of the display unit A2600. Also,
Reference numeral 2800 denotes a display unit C connected to the terminal unit 2500. The addresses shown in the upper right of each configuration are the addresses allocated to each configuration.

Each component connected to the terminal unit 2500 monitors reception of command data (command packet) in step S101 of FIG. When the command data is received, the process proceeds to step S102, and it is checked whether or not the upper address shown in FIG. 36 is an address assigned to itself. For example, in the case of the display unit A2600 shown in FIG. 37, it is checked whether or not the upper address is “H (01)”. If it is not a packet addressed to itself, the process returns to step S101 without performing any processing, and prepares for the next command reception. Since the packet information from the terminal unit 2500 is automatically sent to the next image display unit via its own driver 150, if the driver 150 is kept in the driving state, other image connected to itself will be displayed. Since the data is automatically transferred to the display unit, there is no need to perform any further control.

On the other hand, if the upper 8 bits are a packet addressed to itself in step S102, the flow advances to step S103 to check the address of the lower 8 bits to determine whether the packet is for itself. Display unit A2600 in FIG.
If the lower 8 bits are "00", it is determined that the packet is addressed to itself. If the lower 8 bits are not "00", it is determined that the packet is addressed to a device hanging on itself, for example, a printer 2650.

If it is determined in step S103 that the packet is not addressed to itself, the flow advances to step S104 to relay and transmit the received packet to the optional connection device. For example, it is sent from the display unit's own modem to the connection option device via the external I / F. Then, the process returns to step S101 to prepare for receiving the next command.

On the other hand, if it is determined in step S103 that a packet addressed to itself has been received, the flow advances to step S105 to check whether or not the own device is in the power-off state (display panel light-off state). If it is in the power-off state, the process proceeds to step S106, in which the address of the terminal unit is set as the destination address at the next command transmission timing addressed to the terminal unit, and the own address is set as the sending address to indicate the light-off state. Generate and send a return packet incorporating the command data. Then, the process returns to step S101.

On the other hand, if it is not deactivated in step S105, the flow advances to step S107 to analyze the received packet. Then, in the subsequent step S108, it is checked whether or not the invalid command cannot be processed by the own device. If the command is not an invalid command, the process advances to step S109 to execute a process corresponding to the analyzed command. Then, the process returns to step S101.

On the other hand, if an invalid command is received in step S108, the flow advances to step S110 to set the terminal address to the destination address at the next command transmission timing addressed to the terminal unit, and to set the own address to the sending address. Set to generate and send a return packet incorporating the "NAK" command data. And step S
Return to 101.

When a request to transmit to the terminal unit is issued from the own device, the address of the terminal unit is set to the destination address at the next command transmission timing addressed to the terminal unit, and the own address is set to the sending address. Is set and a transmission packet incorporating the transmission command data is generated and transmitted.

Alternatively, when there is a transmission request from the connection option device and there is no transmission request from itself, the terminal address is set to the destination address at the next command transmission timing addressed to the terminal unit from itself and the sending address is set. The address of the connected device is set, and a transmission packet incorporating the transmission command data is generated and transmitted.

As described above, according to the fifth embodiment, the required number of image display units can be connected to one terminal unit.

In the fifth embodiment, since the common data is received by the image display units, if the specifications of the image display units are common, the display data is directly transmitted to the required number of image display units. Can be sent.

However, if the display specifications are different in each image display unit, for example, if each image display unit or the video signal processing unit of the terminal unit is provided with a function of performing resolution conversion,
Restrictions on specifications of the image display unit to be connected are greatly eased.

For example, the terminal unit converts the input video data from the input I / F to high-resolution image information, or converts the input video data to image information of a resolution whose transmission quality is guaranteed, and transmits it to each image display unit. Then, each image display unit may control the received image information of the predetermined resolution so as to convert the received image information into a resolution suitable for the own apparatus and display the converted image information.

[Sixth Embodiment] In each of the embodiments described above, the terminal unit and the image display unit perform completely independent configurations and controls. But,
The invention is not limited to the examples described above,
For example, a configuration may be adopted in which a processing procedure necessary for processing information related to display output from the terminal unit by the image display unit can be transferred from the terminal unit to the image display unit as needed.

With such a configuration, even if the image display unit cannot provide an appropriate display only with the provided functions, or if the apparatus is improved, the feedback to the image display unit is ensured. can do. As described above, the sixth embodiment according to the present invention in which a predetermined control procedure of the image display unit can be transferred from the terminal unit,
This will be described below with reference to FIGS. 39 and 40. The configuration of the sixth embodiment is the same as that of each of the above-described embodiments except for the configuration described below, and a detailed description of such portions will be omitted.

FIG. 39 is a block diagram showing the configuration of the sixth embodiment according to the present invention, FIG. 40 is a flowchart showing the download processing of the terminal unit of the sixth embodiment, and FIG. 41 is the sixth embodiment. 9 is a flowchart illustrating a download process of the image display unit according to the embodiment.

In the sixth embodiment, compared to the configuration of the first embodiment shown in FIG.
Is provided with a program memory 260, and the image display unit 1 is provided with a program memory 160 in which a control program downloaded to the display unit CPU 101 is stored. The program memory 160 is a non-volatile memory, and the program memory 260 has the same configuration as that of FIG. 2 except for the rewritable configuration such as an EEPROM, a flash memory, and a battery-backed SRAM, so that the detailed description is omitted.

In the sixth embodiment having the above configuration, for example, following the power-on processing shown in FIGS. 8 and 9, the processing shown in FIGS. 40 and 41 is executed.

The terminal unit 2 requests the image display unit 1 to transmit a program ID command indicating the version of the program in step S150 in FIG. Then, in step S151, the program ID returned is analyzed and compared with the program ID stored in the program memory 260 of the own device. And the following step S
If the program ID of the image display unit 1 is the same version as the program ID of its own device in 152, it is determined that there is no need to download the program, and the processing shifts to the operation mode setup processing shown in FIG.

On the other hand, if it is determined in step S152 that the version is different from the program ID of the own apparatus, it is determined that the program needs to be downloaded, and step S1 is executed.
Proceeding to 53, a program download request is transmitted to the image display unit 1. Then, the response from the image display unit 1 is checked,
Check whether the download is possible. If the download cannot be performed for some reason or if the program memory 160 is not provided, a message indicating that the download is impossible is returned. , Receive hardware specifications and adjustment data. In this case, the terminal unit 2 has a control program with limited functions. It can be displayed with minimum functions.

On the other hand, if download permission is returned in step S154, the flow advances to step S155 to download an amount of the program that can be transmitted at the next transmission timing. Then, it is checked in step S156 whether the download has been completed. If it has not been completed yet, the process returns to step S155, and downloads an amount of programs that can be sent at the next transmission timing.

In this way, the program is sequentially downloaded, and when all the downloads are completed, the process shifts from step S156 to the power-on process shown in FIG.
Receives hardware specifications and adjustment data.

The flow shifts to the operation mode setup processing shown in FIG.

On the other hand, the image display unit 1 monitors command reception from the terminal unit 2 in step S161 shown in FIG. Then, when the command reception is detected, step S162
To check whether the command is a transmission request command of a program ID command. If the command is a transmission request command of a program ID command, the process proceeds to step S163, and the program ID indicating the version of the program stored in the program memory 160 of the own device is returned to the terminal unit 2.

On the other hand, in step S162, the program ID
If it is not a command transmission request command, step S
Proceeding to 164, it is determined whether or not a download request command has been received. If the download request command has not been received, a process corresponding to the received command is performed.

On the other hand, if it is determined in step S164 that a download request command has been received, the flow advances to step S165 to check whether download is possible. If the download is impossible for some reason or if the program memory 160 is not provided, it is determined that the download is not possible, and the process proceeds to step S166, where the download disable is returned to the terminal unit 2 and the power is turned on as shown in FIG. Then, the hardware specifications and adjustment data are transmitted.

On the other hand, if download is possible in step S165, the flow advances to step S167 to return a download permission. Then, in step S168, the terminal unit 2
Download the program sent from. Then, in step S169, it is determined whether or not the download has been completed. If not completed yet, step S168
Return to and download as many programs as can be sent at the next transmission timing.

In this way, the program is sequentially downloaded, and when all the downloads are completed, the process proceeds to the power-on process shown in FIG. 9 from step S169 to transmit the hardware specifications and adjustment data.

The program to be downloaded as described above can be a macro instruction group or the like of the program when the image display unit 1 performs display control. Also, it is desirable that the control program is written in C language, and the terminal unit 2 executes the control program written in C language while sequentially translating the control program.

In this case, there is an advantage that the control program can be executed without depending on the machine language of the CPU of the terminal unit 2. In addition,
It goes without saying that the control program is not limited to the C language.

As described above, according to the sixth embodiment, even if the function normally provided by the image display unit cannot be used for proper display, or if the apparatus is improved. In this way, it is possible to reliably feed back to the image display unit.

Further, the terminal unit 2 can execute a control program suitable for the characteristics of the image display unit 1. For example, in a small display, the menu display function is reduced and the remote control is mainly used. On the other hand, a large display incorporates a visual I / F such as an icon in addition to a character menu.

[Seventh Embodiment] In each of the embodiments described above, an example in which adjustment of the terminal unit and the image display unit is performed in accordance with an instruction from a user via a user I / F. explained. However, the present invention is not limited to the above example, and the image display unit may detect the surrounding environment of the own device, and may perform control such that the image display unit and the terminal unit are adjusted according to the detection result. . A seventh embodiment according to the present invention in which the surrounding environment can be detected as described above will be described below with reference to FIGS. The configuration of the seventh embodiment is the same as that of each of the above-described embodiments except for the configuration described below, and a detailed description thereof will be omitted.

FIG. 42 is a block diagram showing the configuration of the seventh embodiment according to the present invention, FIG. 43 is a diagram showing an example of the arrangement of each component in the seventh embodiment, and FIG. FIG. 45 is a flowchart showing the control of the image display unit at the time of detecting an environmental change according to the embodiment, and FIG. 45 is a flowchart showing the control of the terminal unit at the time of detecting an environmental change according to the seventh embodiment.

The seventh embodiment shown in FIG. 42 is different from the configuration of the fourth embodiment shown in FIG. 31 in that the terminal unit 1600 detects whether or not a telephone is used. The image display units 1700 and 1800 include a detection unit 271, a brightness detection unit 171 that detects the brightness around the image display unit, a noise detection unit 172 that detects the volume (noise intensity), and a surrounding color temperature. The point is that a color temperature detecting section 173 is provided. The other configuration is the same as the configuration in FIG. 31 and thus the detailed description is omitted. The image display section B
1800 also includes a detection unit similar to the image display unit A1700.

In the following description, the example shown in FIG. 42 will be described. However, it is needless to say that each of the above embodiments can be configured to include the above detectors.

For example, as shown in FIG.
00 is installed at the corner of the living room, the display unit A1700 which is a large wall-mounted monitor is installed on the wall of this living room, and the display unit B1800 which is a small monitor is installed in the bedroom. In such a case, it is expected that the installation environment is greatly different in each display unit, and it is not appropriate to make the same adjustment result in each display unit. In addition, depending on the adjustment by the user, it is not always the case that the image is viewed with the optimum image quality. Therefore, in the seventh embodiment,
A detector for the surrounding environment of each display unit and the terminal unit is provided, and adjustment suitable for the surrounding environment is performed.

First, control of the image display unit will be described with reference to FIG. FIG. 44 is a flowchart showing the control of the image display unit at the time of detecting an environmental change according to the seventh embodiment.

The following control is performed in the image display unit. That is,
The display unit CPU 101 performs a process corresponding to a case where a change of a predetermined value or more is detected in the detection result of each detector. In the following description, it is assumed that the adjustment right of each adjustment item is on the side described in the first embodiment.

First, in step S201, it is determined whether or not a change of a predetermined value or more is detected in the detection result of the brightness detector 171. If a certain or more change is detected, the process proceeds to step S202, and the detection result is notified to the terminal unit 1600. This is because the right of adjustment corresponding to a change in brightness, such as contrast adjustment, is provided by the terminal unit 1600 as described above.
Because it is on the side. Then, in step S201, the process merges with a case where a change of a predetermined value or more is not detected in the detection result of the brightness detector 171 and the process proceeds to step S203.

In the step S203, the noise detector 172
It is determined whether or not a change equal to or more than a predetermined value is detected in the detection result. If a change exceeding a certain level is detected, step S
Proceeding to 204, the detection result is notified to the terminal unit 1600.
This is because although the image display has the right to adjust the volume, it is necessary to control the volume so that it does not increase when the phone is in use, as described below. This is a transmission for detecting whether or not it is in progress. Thereafter, the volume is adjusted in accordance with the volume adjustment instruction from the terminal unit. This control is performed by normal command processing.

Here, when the terminal unit requests to transmit a command indicating whether or not the telephone is in use, and when the telephone use state is constantly notified, the volume is adjusted accordingly. You only need to send the result. Then, in step S203, the process merges with a case where a change of a predetermined value or more is not detected in the detection result of the noise detector 172, and the process proceeds to step S205.

In step S205, the color temperature detector 173
It is determined whether or not a change equal to or greater than a predetermined value is detected in the detection result. If a change exceeding a certain level is detected, step S
Proceeding to 206, for example, the panel driving unit 106 of the image display unit
Is adjusted to adjust the color humidity to be higher for light such as a fluorescent lamp, and to lower the color temperature for incandescent lamps.

In step S207, the adjustment result is notified to the terminal unit 1600, and the process returns to step S201.

Next, control of the terminal unit will be described with reference to FIG. FIG. 45 is a flowchart showing the control of the terminal unit at the time of detecting an environmental change according to the seventh embodiment. The terminal unit performs the following control.

The terminal unit 1600 monitors reception of command data from the image display unit in step S211 as shown in FIG. If the command data has not been received, the process proceeds to step S212, in which the output of the telephone use detection unit 271 of the terminal unit 1600 is monitored to determine whether the use state of the telephone has changed. Although only one telephone use detection unit 271 is shown in FIG. 42, when a plurality of telephones are provided, the use state of each telephone can be switched.
This can be configured with a known in-phone detection function such as detecting a DC loop formation state of the telephone and detecting whether or not the telephone is in use. If there is no change in the telephone use state, the process returns to step S211.

On the other hand, if a command has been received in step S211, the flow advances to step S213 to check whether or not the command is a command for notifying an environmental change. If the command is not a notification of an environmental change, a corresponding process is performed.

If it is determined in step S213 that the command is a notification of an environmental change, the flow advances to step S214 to check whether or not brightness is detected. If the brightness detection result has changed, the process advances to step S215 to perform adjustment corresponding to the change in brightness, such as contrast control in which the terminal unit 1600 has the right to adjust.

At step S216, the adjustment result is held, and the adjustment result is reported to the corresponding image display unit. At step S214, the case where there is no change in brightness is merged, and the process proceeds to step S217.

In step S217, it is checked whether or not the detected noise level is a noise level. If the noise detection result has changed, it merges with the case where there is a change in the telephone use state in step S212, and proceeds to step S218 to determine whether a telephone in the same room as the image display unit that has now notified the environmental change is in use. Check whether or not. If not in use, step S21
Then, the flow advances to step S9 to instruct the image display unit to adjust the volume according to the detected noise level. If the air conditioner is in use, the flow advances to step S220 to instruct the image display unit to lower the volume.

Next, proceeding to step S221, if the color temperature adjustment result has been sent, proceeding to step S222,
The process returns to step S211 while holding the adjustment result.

[Eighth Embodiment] In the embodiment described above, an example in which the terminal section and the image display section are directly connected by the interface cable has been described. However, the present invention is not limited to the above-described example, and it goes without saying that the present invention includes wireless communication of some interface cable portions.

An eighth embodiment according to the present invention will be described below with reference to FIG. 46, in which a part of the interface cable is configured to communicate wirelessly. The eighth embodiment is directed to an example in which optical communication is performed in a wireless section using light, for example, infrared light. However, the present invention is not limited to the above example. For example, communication may be performed using ultrasonic waves, or radio waves may be used, and various methods can be adopted. Since the configuration of the eighth embodiment is the same as that of each of the above-described embodiments except for the configuration described below, detailed description of such portions will be omitted.

In the eighth embodiment, as shown in FIG. 46, the image display section is provided with an optical communication section instead of the interface connector with the terminal section, and the optical communication section is provided with a command to the terminal section. It consists of a light-emitting unit for transmitting information and a light-receiving unit for receiving information from the terminal unit. A change in the amount of light received from the light-receiving unit is detected as an electrical signal, which is amplified by an amplifier and output to the display modem. The light emission of the light emitting unit may be controlled via the driver circuit according to the modulation signal from the display unit modem.

On the other hand, in the terminal section, an optical communication section substantially similar to the image display section is provided at the end of the interface cable, and the optical communication section is connected to the light emitting section for transmitting information to the image display section and the image display section. A light receiving section for receiving command information, detecting a change in the amount of light received from the light receiving section as an electric signal, amplifying this by an amplifier, outputting the amplified signal to a terminal modem, and driving a driver circuit according to a modulation signal from the terminal modem. Light emission of the light emitting unit may be controlled via the light emitting unit. Known methods can be applied to these configurations and controls.

It is desirable that the optical communication section of the image display section is disposed, for example, on the upper surface of the housing of the image display section. If it can be arranged at any position. For example, it may be on the lower surface of the image display unit housing, on the back surface, or on the front surface.

When the image display unit is a wall-mounted thin monitor, it is disposed on the top of the housing as shown in FIG.
If the optical communication section of the terminal section is located opposite to the optical communication section arrangement position of the image display section near the ceiling, input and output to and from the image display section can be suppressed to only power cables.

By arranging the optical communication section on the terminal side near the ceiling in this way, the existence of both optical communication sections hardly impairs the appearance, and the trouble of cable wiring is released. Further, even if the installation location is changed, it is sufficient to simply change the position of the optical communication unit on the ceiling side.

Further, by disposing the optical communication unit on the terminal side above the position where the image display unit is to be installed in advance, it is possible to easily cope with a change in the arrangement position of the image display unit. . Also, on the terminal side, when light from the optical communication unit of the image display unit is detected, it can be determined that the image display unit at the detection position has become movable, and if only the optical communication unit at the position is energized, The deterioration of the optical communication section can be prevented.

[Ninth Embodiment] In the above-described embodiment, an example has been described in which one image display unit displays one screen. However, the present invention is not limited to the above example, and a plurality of image display units may be arranged close to each other, and control may be performed so that one image can be displayed on the plurality of image display units as a whole. . A ninth embodiment according to the present invention in which a plurality of image display units are controlled so as to be able to display one image as described above will be described with reference to FIG. Since the configuration of the ninth embodiment is the same as that of the above-described embodiments except for the configuration described below,
A detailed description of such portions is omitted.

As an example in which one image is controlled to be able to be displayed on a plurality of image display units as a whole, reference numeral 47 denotes one display screen constituted by four image display units. In the case of this configuration, the configuration of each image display unit can be, for example, the image display unit configuration shown in FIG. 34 of the fourth embodiment described above.

In the terminal section, address control may be performed such that only (１ ／) display data of each display screen shown in FIG. 47 of the display screen is received as video data for each image display section.

By controlling in this way, a large screen can be displayed.

[Tenth Embodiment] In the embodiment described above, when information is communicated between the terminal unit and the image display unit, the communication timing is determined in advance for each data, and the communication is performed. A configuration has been described in which the type of information that can be specified can be specified at the timing at which the information is communicated. However, the present invention is not limited to the above example, and the information may include information type identification data without limiting the communication timing of the information. The first embodiment according to the present invention thus configured
Embodiment 0 will be described with reference to FIG. In addition,
The configuration of the tenth embodiment is the same as that of each of the above embodiments except for the configuration described below, and a detailed description of such portions will be omitted.

In the tenth embodiment, the source of the information is header data indicating the nature and amount of data to be communicated at the beginning of each piece of communication information so that the type of communication information can be determined at the communication timing. And send it.

For example, in the example of FIG. 48, header data is added to the head of each piece of information shown in black, and in the battle of video data, the data to be transmitted is video data.
A header indicating that the data capacity is 2 dots (pixels) is added. If there are many audios, header data indicating that they are L channel audio data and R channel audio data, respectively, are added.

By performing such control, useless idle time can be prevented, and much information can be communicated. For example, necessary information can be efficiently transferred when the image display unit has a frame memory or the like, or when an optional device is connected and a large amount of data is transferred to the optional device.

[Other Embodiments] Even if the present invention is applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), the present invention includes only one device. The present invention may be applied to an apparatus (for example, a copying machine, a facsimile machine, etc.).

An object of the present invention is to supply a storage medium (or a recording medium) in which a program code of software for realizing the functions of the above-described embodiments is recorded to a system or an apparatus, and to provide a computer (or a computer) of the system or the apparatus. Or CPU and MPU) read and execute the program code stored in the storage medium,
Needless to say, this is achieved. In this case, the program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.
In addition, by the computer executing the readout program code, not only the functions of the above-described embodiments are realized, but also based on the instructions of the program code,
The operating system (OS) running on the computer performs part or all of the actual processing,
It goes without saying that a case where the function of the above-described embodiment is realized by the processing is also included.

Further, after the program code read from the storage medium is written in the memory provided in the function expansion card inserted into the computer or the function expansion unit connected to the computer, the program code is read based on the instruction of the program code. , The CPU provided in the function expansion card or the function expansion unit performs a part or all of the actual processing,
It goes without saying that a case where the function of the above-described embodiment is realized by the processing is also included.

When the present invention is applied to the storage medium, the storage medium includes the storage medium described above (shown in FIGS. 2, 3, and 4).
The program code corresponding to the flowchart is stored.

[0301]

As described above, according to the present invention, since the video signal can be transmitted in accordance with the characteristics of the image display unit connected at the supply source, the characteristics of the connected image display unit change. Can also be easily adapted.

Further, at the start of the operation, the adjustment state of the image display unit can be surely recognized by the supply source, and the trouble caused by the deviation of the adjustment result can be eliminated before the operation.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a basic configuration of an embodiment according to the present invention.

FIG. 2 is a block diagram illustrating a detailed configuration of an image display unit and a terminal unit according to the embodiment.

FIG. 3 is a diagram illustrating a detailed configuration of an interface circuit portion between a terminal unit and an image display unit and an input / output unit of a modem according to the embodiment;

FIG. 4 is a diagram illustrating a detailed configuration example of a portion that receives image information having different specifications of an input I / F and outputs the image information to a video signal processing unit according to the embodiment;

FIG. 5 shows an input I / F shown in FIG. 4 according to the embodiment;
FIG. 4 is a diagram showing an example of output timing of an input I / F when an image signal of the NTSC specification is input in FIG.

FIG. 6 shows an input I / F shown in FIG. 4 according to the embodiment;
FIG. 3 is a diagram showing an example of output timing of an input I / F when an image signal of HDTV specification is input in FIG.

FIG. 7 is a diagram showing an example of an operation check control procedure with the image display unit after the power to the terminal unit is turned on in the present embodiment.

FIG. 8 is a flowchart showing control when the power of the terminal unit of the present embodiment is turned on.

FIG. 9 is a flowchart showing control at the time of power-on of the image display unit according to the embodiment.

FIG. 10 is a diagram illustrating an example of a communication packet configuration used for communication control when the power is turned on according to the present embodiment.

FIG. 11 is a diagram showing another configuration example of a communication packet used for communication control when the power is turned on in the present embodiment.

FIG. 12 is a diagram illustrating a data configuration in a unit cycle according to the present embodiment.

FIG. 13 is a diagram illustrating an example of a packet configuration when transmitting and receiving command data according to the present embodiment.

FIG. 14 is a diagram showing a format example of adjustment data in the embodiment.

FIG. 15 is a flowchart showing a setup process of an operation mode of the terminal unit in the embodiment.

FIG. 16 is a flowchart showing a setup process of an operation mode of the image display unit in the embodiment.

FIG. 17 is a diagram illustrating an example of data communication control timing within a vertical synchronization signal generation cycle between the image display unit and the terminal unit according to the present embodiment.

FIG. 18 is a diagram illustrating an example of data communication control timing within a horizontal synchronization signal generation cycle between the image display unit and the terminal unit according to the present embodiment.

FIG. 19 is a diagram for explaining data communication timing between the image display unit and the terminal unit when the display panel of this embodiment is 852 dots × 480 dots.

FIG. 20 is a diagram for explaining data communication timing between the image display unit and the terminal unit when the display panel of this embodiment is 640 dots × 480 dots.

FIG. 21 is a diagram for explaining data communication timing between the image display unit and the terminal unit when the display panel of this embodiment is 1365 dots × 768 dots.

FIG. 22 is a horizontal transfer clock (CLK) when the display panel of this embodiment is 1365 dots × 768 dots;
FIG. 8 is a diagram for explaining data communication timing between the image display unit and the terminal unit when the frequency of the terminal is changed.

FIG. 23 shows an example in which audio data according to the present embodiment is VSY.
FIG. 5 is a diagram illustrating an example of communication timing between a terminal unit and an image display unit when collectively communicating at each NC timing.

FIG. 24 shows the command data of this embodiment as HSYN.
FIG. 7 is a diagram illustrating an example of communication timing between a terminal unit and an image display unit when communication is performed by dividing at each C timing.

FIG. 25 is a diagram showing an example of communication timing between a terminal unit and an image display unit when command data according to the present embodiment is controlled to be communicable during all periods except a video data valid period and an audio data communication period. is there.

FIG. 26 is a diagram for describing an example of a basic system configuration according to a second embodiment of the present invention.

FIG. 27 is a diagram for explaining another configuration example of the basic system according to the second embodiment of the present invention.

FIG. 28 is a block diagram showing a detailed configuration of the second embodiment.

FIG. 29 is a block diagram showing a configuration of a third exemplary embodiment according to the present invention.

FIG. 30 is a diagram for explaining information communication timing according to the third embodiment.

FIG. 31 is a block diagram showing a configuration of a fourth exemplary embodiment according to the present invention.

FIG. 32 is a timing chart for explaining communication control in a VSYNC cycle between a terminal unit and an image display unit according to the fourth embodiment.

FIG. 33 is a timing chart for explaining communication control in a HSYNC cycle between a terminal unit and an image display unit according to the fourth embodiment;

FIG. 34 is a block diagram showing a configuration of a fifth exemplary embodiment according to the present invention.

FIG. 35 is a diagram illustrating a packet configuration used in the fifth embodiment.

FIG. 36 is a diagram for describing a detailed configuration of an address command shown in FIG. 33;

FIG. 37 is a diagram showing a state in which a plurality of image display units according to the fifth embodiment are connected.

FIG. 38 is a flowchart for explaining command data reception processing of the image display unit according to the fifth embodiment.

FIG. 39 is a block diagram showing a configuration of a sixth exemplary embodiment according to the present invention.

FIG. 40 is a flowchart showing a download process of the terminal unit according to the sixth embodiment.

FIG. 41 is a flowchart showing download processing of the image display unit according to the sixth embodiment.

FIG. 42 is a block diagram showing a configuration of a seventh exemplary embodiment according to the present invention.

FIG. 43 is a diagram illustrating an arrangement example of each configuration according to the seventh embodiment;

FIG. 44 is a flowchart illustrating control performed when an image display unit detects an environmental change according to the seventh embodiment.

FIG. 45 is a flowchart showing control performed when an environmental change is detected in the terminal unit according to the seventh embodiment.

FIG. 46 is a diagram for explaining an example in which some interface cable portions of the eighth embodiment according to the present invention are configured to communicate wirelessly.

FIG. 47 is a diagram illustrating a configuration example of a ninth embodiment according to the present invention.

FIG. 48 is a timing chart for explaining communication control in a HSYNC cycle between a terminal unit and an image display unit according to the tenth embodiment of the present invention.

FIG. 49 is a diagram illustrating a configuration in a case where various images are to be displayed on a conventional television receiver that receives and displays television broadcasts.

[Procedure amendment]

[Submission date] April 21, 1999 (1999.4.2
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: Image display device control system and image display system control method

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display control system including a supply source for transmitting a signal including at least a video signal, and an image display unit for receiving a signal from the supply source and displaying a corresponding image. And an image display system control method.

[0002]

2. Description of the Related Art FIG. 49 shows a conventional arrangement for displaying various images on a television receiver for receiving and displaying a television broadcast. Conventionally, as shown in FIG. 49, a television receiver has an antenna line for terrestrial broadcasting (VHS / UHF) and a satellite broadcast (BS) as an antenna line.
Antenna wire is connected. Further, as a cable from another display information supply source, for example, a video signal line and an audio signal line from a video deck, a video signal line and an audio signal line from an LD / DVD playback device, and a digital broadcast receiving device (STB) ), Each signal line cable was connected.

As described above, in the conventional television receiver, the display unit, the tuner unit, the input signal selection unit, and the like are all integrally formed. For this reason inevitably body had to become a large-scale housing in width thickness.

On the other hand, in recent years, televisions have also become thinner, and wall-mounted televisions have appeared. In this wall-mounted television, the thickness must be reduced as much as possible, and the weight must be small. For this reason, in this type of television, the image display unit and the terminal unit that supplies display information to the image display unit are separate casings.

[0005]

However, in this type of conventional wall-mounted television or the like, the image display unit and the terminal unit are paired with each other to form one television receiver.
For example, one terminal unit can connect only one type of image display unit. Alternatively, the image display unit for sending the display information cannot be changed unless a very troublesome operation is performed.

Further, the adjustment of the picture quality of the television and the like can be performed only on either the terminal section or the image display section, which is inconvenient.

[0007]

The present invention has, for example, the following arrangement as one means for achieving the above object.

That is, an image display control system comprising: a supply source for transmitting a signal including at least a video signal; and an image display unit for receiving a signal from the supply source and displaying a corresponding image. Source is a characteristic acquisition unit that acquires characteristic information of the image display unit when power is turned on, and a determination unit that determines a signal communication specification with the image display unit from characteristic data acquired by the characteristic acquisition unit, Communication means for performing communication of a signal including the video signal in the communication specification determined by the determination means, the image display unit,
Specific information transmitting means for transmitting specific information for specifying characteristics of the apparatus to the supply source, and display unit communication means for communicating a signal including the video signal determined by the determination means of the supply source. Features.

[0009] For example, the characteristic acquiring means includes: characteristic information requesting means for transmitting a request for transmitting characteristic information to the image display unit; detecting means for detecting a connection request including characteristic information from the image display unit; A connection request transmission unit that transmits a connection request including the specific information of the own device to the supply source, the connection request transmission unit including: a characteristic information detection unit that detects characteristic information returned from the image display unit; And a characteristic information transmitting unit that transmits characteristic information of the apparatus in response to a characteristic information transmission request from a supply source.

For example, if the characteristic information requesting means does not return the characteristic information from the image display unit even after transmitting the characteristic information transmission request a predetermined number of times after the power source is turned on, the characteristic information requesting means is provided. The transmission of the transmission request is stopped. Alternatively, the connection request transmitting unit may be configured to transmit the characteristic information from the supply source if the transmission request of the characteristic information is not returned from the supply source even if the connection request is transmitted a predetermined number of times after the image display unit is turned on. It is characterized by monitoring the detection of the information transmission request.

Further, for example, the request for transmission of the characteristic information by the characteristic information requesting means includes a request for transmission of the specification information of the image display unit, and the image display unit responds to the request for transmission of the specification information. Is returned.

Also, for example, the transmission request for the characteristic information by the characteristic information requesting means includes a transmission request for the adjustment information of the image display unit, and the image display unit responds to the request for the transmission of the adjustment information. Is returned. Alternatively, the determining means specifies a display screen size of the image display unit from the characteristic information, determines a video signal amount to be transmitted corresponding to the specified display screen size, and determines a signal communication specification. .

Also, for example, the signal communication specification determined by the determining means includes a vertical synchronization cycle and a horizontal synchronization cycle for transmitting a video signal, and a video signal transmission clock cycle.

Further, for example, the characteristic data of the image display section includes the number of pixels of a display device provided in the image display section.
Pixel array, emission characteristics of a display device included in the image display unit, gradation characteristics of the image display unit (gradation number, gamma characteristics of the display device), type of the image display unit (screen size, aspect ratio, device Types), specifications of a sound reproduction system included in the image display unit, and frame frequencies that can be displayed on the image display unit.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram for explaining a basic configuration of an embodiment according to the present invention. In FIG. 1, reference numeral 1 denotes an image display unit, which is a thin wall-mounted type in this embodiment. Reference numeral 2 denotes a terminal unit which outputs display data and audio data to the image display unit 1 using synchronous bidirectional serial digital data described later, and includes a tuner unit for receiving a television broadcast as described later.

Reference numeral 3 denotes a video deck which is a supply source of image and sound signals to the terminal unit 2, and 4 denotes a laser disk or a DV.
An LD / DVD player 5 for reproducing a D disk and STBs 5 for receiving and selecting a digital broadcast.

The terminal unit 2 is connected to a connection cable for a supply source of each of these image signals and the like, and also has an antenna line for terrestrial broadcast (VHS / UHS) to the tuner unit and a satellite broadcast (BS). Antenna wires are also connected. However, between the terminal unit 2 and the image display unit 1, basically, only one thin cable is connected,
Even a wall-mounted image display unit has a configuration in which cable processing is easy and the appearance is not unsightly.

The detailed configuration of the image display unit 1 and the terminal unit 2 of the present embodiment having the above system configuration will be described below with reference to FIG. First, the detailed configuration of the image display unit 1 will be described.

In the image display unit 1, reference numeral 101 denotes a display unit CPU that controls the entire image display unit 1 and has a built-in ROM for storing a control procedure and the like shown in a flowchart described later. The display unit CPU 101 includes a display unit modem 103.
In accordance with the command data received from the terminal unit 2, reception control of various types of reception data is performed. The control of each unit is performed via the control bus 151.

Reference numeral 102 denotes a connector for receiving a connection cable with the terminal unit 2, 103 denotes a display unit modem, and 104 denotes a display unit CP.
Control of U101 and playback SY from display unit modem 103
A timing generator that generates control timing of the image display unit 1 according to the NC signal or the CLK signal.

Reference numeral 105 designates 2 which is decoded by the display
A video signal processing unit that converts a 4-bit digital video signal into a luminance image signal that can be displayed on the display panel 110 and outputs the converted signal. The timing of the luminance signal from the video signal processing unit 105 is determined according to the driving conditions from the display unit CPU 101. A panel driving unit that drives the display panel 110 at a timing from the generating unit, 110 is a display panel.

Reference numeral 121 denotes a D / A converter that receives a 16-bit digital audio signal from the display modem 103 in accordance with the reception timing from the timing generator and converts it into a corresponding analog audio signal. Reference numeral 122 denotes an audio amplifier for amplifying an input analog signal from the D / A converter 121, and reference numeral 123 denotes a speaker.

Reference numeral 130 denotes a user interface (user I / F) for performing various operation inputs from the user. Here, in addition to, for example, display adjustment, detection of, for example, remote control input is also included.

Next, the details of the terminal unit 2 will be described.

In the terminal unit 2, reference numeral 201 denotes a terminal CPU which controls the entire control of the terminal unit 2, and has a built-in ROM for storing a control procedure and the like shown in a flowchart described later.
The terminal CPU 201 controls the timing control unit 204 and the video signal processing unit 20 so that the display data can be transmitted to the image display unit 1 via the terminal modem 203 in a desired format.
5 is controlled. Also, the control command data is output via the terminal modem 203 in the same manner as the control command data for the image display unit 1.
The control of each unit is performed via the control bus 251.

Reference numeral 202 denotes a cable connector for connecting to the image display unit 1, reference numeral 203 denotes a terminal modem, and reference numeral 204 denotes a terminal CPU 20.
1 is a timing generation unit of the terminal which outputs a SYNC signal or a CLK signal to the terminal modem 203 and a command timing signal indicating a command transmission timing.

Reference numeral 205 denotes an input image signal from the input I / F 220 and an image signal (video signal) from the tuner 240.
Is a video signal processing unit that receives the input signal, converts it into a corresponding 24-bit digital video signal, and outputs it to the terminal modem 203. An audio signal processing unit 210 also receives an input audio signal (such as an audio signal) from the input I / F 220, converts the input audio signal into a corresponding 16-bit digital audio signal, and outputs the digital audio signal to the terminal modem 203.

Reference numeral 220 denotes an interface with a supply source (3 to 5) for each image information shown in FIG.
The image information signal and the audio signal from the tuner unit 240 are input, and one of the inputs is selected under the control of the terminal CPU 201, and the audio signal is processed by the audio signal processing unit 210.
The image information signal is supplied to the video signal processing unit 205 as a video signal, the clock signal such as a SYNC signal is supplied to the timing generation unit 204, and the input signal discrimination data is supplied to the terminal CPU2.
01 are output.

Reference numeral 230 denotes a user interface (user I / F) for inputting various operations from the user. Here, in addition to, for example, display adjustment, detection of, for example, remote control input is also included. Reference numeral 240 denotes a tuner unit that receives terrestrial broadcasting and satellite broadcasting. In addition, 221-
Reference numeral 223 denotes an input terminal from the supply sources (3 to 5), 241 denotes an antenna input for terrestrial broadcasting, and 242 denotes an antenna input for satellite broadcasting.

The terminal unit 2 having the above configuration is not limited in the specification of the image display unit to be connected, and can be connected to an image display unit of various specifications as long as the image display unit has the same interface specification. Then, the terminal unit 2 and the image display unit 1
The detailed configuration of the interface circuit portion and the input / output portion of the modem will be described with reference to FIG.

In the display modem 103, an input / output driver circuit 310 receives a signal from a communication medium in accordance with a communication direction control signal from the timing generator 104, and outputs a signal from the modulator 312. The demodulation unit 312 demodulates the received signal from the receiver unit of the driver circuit 310 and converts the demodulated serial demodulated data into 24-bit parallel demodulated data and outputs the data. The demodulation unit 312 converts the 16-bit parallel control data from the display unit CPU 101 into serial data. A modulation unit that converts the data into data, modulates the data, and outputs the data to the driver unit of the input / output driver circuit 310.

Reference numeral 313 denotes a restoration unit for restoring the demodulated signal in accordance with the timing control signal from the timing generation unit 104 and distributing it to each unit. The reproduced synchronization signal and CLK signal are output to the timing generation unit 104, and the restored video signal is output. Is output to the video signal processing unit 105, the restored audio signal is output to the D / A converter 121, and the restored command information is output to the display unit CPU 101. A driver circuit 314 outputs control data from the display unit CPU to the modulation unit.

In the terminal modem 203, reference numeral 320 denotes an input / output driver circuit for receiving a signal from a communication medium in accordance with a communication direction control signal from the timing generation unit 204 and outputting a signal from the modulation unit 322, and 321 denotes an input / output driver circuit The demodulation section 322 demodulates the received signal from the receiver section of the circuit 320 and converts the demodulated serial demodulated data into 16-bit parallel demodulated data and outputs it to the terminal CPU 201 via the driver circuit 324.
This is a modulation unit that converts a 24-bit parallel multiplexed signal from 23 into serial data, modulates the serial data, and outputs the result to the driver unit of the input / output driver circuit 320.

323 receives a video signal from the video signal processing unit 205, an audio signal from the audio signal processing unit 210, and control information from the terminal CPU 201, respectively.
A multiplexing unit that multiplexes the signals according to the timing signal from the timing generation unit 204 so as not to overlap and outputs the multiplexed signals to the modulation unit 322. A driver circuit 324 outputs control data from the image display unit from the demodulation unit 321 to the terminal CPU 201.

In this embodiment, the terminal unit 2 and the image display unit 1 can exchange various kinds of information with only a pair of signal lines, and the connection cable can be made simple and thin. Basically, the communication medium that connects the image display unit 1 and the terminal unit 2 is a two-wire twisted cable, and the transmission format is described later.
Is determined by the type of input signal being received.

However, the communication medium is not limited to a cable using an electric conductor wire, but may be an optical signal communication line such as an optical fiber or a wireless communication such as an electromagnetic wave. For example, as shown in FIG. 46 to be described later, an optical communication unit provided above or below the display unit, and a terminal-side optical communication unit installed near the optical communication unit of the display unit by wires or the like from the terminal unit. May be provided.

The input I / F 220 of the present embodiment can input image information of various specifications. FIG. 4 shows a configuration example of a portion that receives image information of different specifications of the input I / F 220 and outputs the image information to the video signal processing unit 205 according to the present embodiment. Although only the image signal is shown in FIG. 4, it goes without saying that a signal having a different specification is also received and shared and output as an audio signal.

The input section of the image information of the input I / F 220
NTSC composite input and S terminal input, HD
Muse signal input and component signal input of TV specification and PC input of PC (computer graphic) specification are possible.
The signal is converted into a B signal and output to the video signal processing unit 205.

For example, a composite signal of the NTSC specification is transmitted from a composite input to an NTSC decoder 401 to be decoded, and is transmitted to a selector 402. The S input signal from the S terminal input is also input to the selector 402, and one of the inputs is selected. For example, here
It is desirable that the S terminal input be controlled so as to have priority.

The signal from the selector 402 is sent to the IP conversion unit 4
04 and the synchronization separation unit 403. A video signal is sent to an IP conversion unit (interlace / progressive conversion unit) 404. If progressive scanning is requested according to the specifications of the image display unit 1, for example, a video signal of 240 lines / 60 Hz is converted to 480 video signals. The Y / color difference signal converted to line / 60 Hz is output. Alternatively, in the case of a QVGA-equivalent pixel number panel (320 × 240), output is performed at 240 lines / 60 Hz without IP conversion.

The matrix processing unit 405 converts this signal into a corresponding RGB signal and outputs it to the multiplexer 440. On the other hand, in the synchronization separation section 403, the synchronization signal (H
−SYNC signal and V-SYNC signal) and outputs the separated signal to the input signal determination unit 430.

For example, a muse of the HDTV specification (Mus)
e) The signal is decoded by a Muse decoder 411 and sent to the selector 412. Further, in the present embodiment, a high-definition component signal input is also provided, which is directly input to the selector 412, and one of the inputs is selected. For example, here, the component input is controlled so as to have priority.

The Y / color difference signal from the selector 412 is sent to the matrix processing unit 415. Matrix processing unit 4
At 15, this signal is converted into a corresponding RGB signal and output to the multiplexer 440. On the other hand, the synchronization separation unit 41
In 3, the synchronization signal (H-SYNC signal, V-SYNC signal) is separated and output to the input signal discrimination section 430. Further, for example, a PC input signal of the PC specification is
1, the synchronization signal (SYNC) is sent to the input signal discrimination section 430, and the RGB signal is
Is output to

The input signal discriminating section 430 receives each synchronization signal (SYNC signal) and discriminates what the input signal is based on the frequency and type (polarity, HV separation or mixed SYNC, etc.) of the received synchronization signal. Then, the result of the determination is notified and output to the terminal CPU 201. Multiplexer 4
The terminal 40 selects one of the input signals under the control of the terminal CPU 201 and outputs it to the video signal processing unit 205.

NT in input I / F 220 shown in FIG.
Input I / F 204 when image signal of SC specification is input
FIG. 5 shows an example of the output timing.

The example of FIG. 5 is a timing example when it is assumed that the output of the input I / F 204 is a signal of an effective video period of about 480 lines vertically and about 28.6 μs horizontally and displayed with about 10% overscan. And the display period is about 430 lines vertically and about 25.7 μS horizontally. In this embodiment, the default of the 10% overscan can be variably set by the user I / F 230.

In the case of the NTSC specification, as shown in FIG. 5, the image signal of the NTSC specification is (1 / 59.94H)
z), a vertical synchronizing signal (VSYNC signal) arrives and is double-speed-converted by the IP unit (1 / 31.4).
The horizontal synchronization signal (HSYNC signal) arrives at a period of 7 KHz).

Then, for example, the period shown in FIG. 5 is fetched by the video signal processing unit 205 and resampled so as to conform to the resolution of the image display unit 1. For example, when the display panel 110 of the image display unit is a panel of 852 × 480 pixels, sampling is performed using a horizontal CLK signal of about 33.1 MHz, and the vertical is about 480 lines of image data of about 430 lines. Inter-line interpolation will be performed.

On the other hand, even if the same
FIG. 6 shows an example of the output timing of the input I / F 204 when V is input.
Shown in The example of FIG. 6 shows a timing example when it is assumed that the output of the input I / F 204 is displayed with about 7% overscan.

As shown in FIG. 6, an image signal of the HDTV specification has a vertical synchronizing signal (VSY) at a period of (1/60 Hz).
NC signal) and a horizontal synchronizing signal (HSYNC signal) with a period of (1 / 33.75 KHz). Then, for example, this period shown in FIG.
05 is sampled and resampled to match the resolution of the image display unit 1. For example, when the display panel 110 of the image display unit is a panel of 852 × 480 pixels, sampling is performed with a CLK signal of about 35.5 MHz horizontally, and about 480 out of 517 effective lines are output as they are vertically.

Next, control of the present embodiment having the above configuration will be described below. The terminal unit 2 of the present embodiment is
As described above, it is possible to control the image display units of various specifications. For this reason, when the power of the terminal unit 2 is turned on, first, a power supply for confirming what type of image display unit is connected is connected. Execute ON processing.

An example of an operation check control procedure with the image display unit 1 after the power to the terminal unit 2 is turned on will be described below with reference to FIG. Since it is not clear what the specifications of the partner image display unit are, the operation confirmation control procedure is an asynchronous communication control with a communication speed of 300 BPS or 1200 BPS as a communication control procedure that can easily perform communication control with the partner. A procedure is negotiated, and communication control is performed using this communication control procedure.

When the terminal unit 2 is powered on, first,
An ID request (connection request) is sent to the image display unit 1. Upon receiving this, the image display unit 1 immediately proceeds to the image display unit 1.
The ID of the own device is returned to the terminal unit 2. Therefore, if the ID is returned from the image display unit 1, the terminal unit 2 determines that the image display unit 1 is up.

However, if the image display unit 1 is not activated when the power of the terminal unit 2 is turned on, there is no response to the ID request. Therefore, if the terminal unit 2 does not return the ID from the image display unit 1 even after sending the ID request at a predetermined interval, for example, n times, the image display unit 1
Determines that it has not started up yet, and stops access to the image display unit 1.

On the other hand, when the power of the apparatus is turned on, the image display unit 1 sets the terminal unit 2 during a certain period of time as a standby period.
It monitors that a command such as an ID request from the terminal unit 2 is sent. If a command is sent during this time, corresponding control is performed. That is, I
When the D request is sent, the ID is returned.

On the other hand, if no connection request or the like is sent from the terminal unit 2 during this time, a connection request is sent to the terminal unit 2 after the end of the waiting period as shown in FIG. (Attached using the ID as a parameter). The terminal unit 2 constantly monitors the reception of the command sent from the image display unit 1, and requests the transmission of the specifications of the image display unit 1 upon detecting the reception of the connection request. In response to this, the image display unit 1 transmits the specification information of its own device to the terminal unit 2.

The terminal unit 2 requests transmission of necessary adjustment data based on the specifications. Then, the image display unit 1 responds to the transmission request of the adjustment data and transmits the image display adjustment data held in the own device to the terminal unit 2.

The terminal unit 2 can grasp the specifications of the image display unit 1 in this way, and thereafter shifts to a normal process according to the specifications of the image display unit 1.

When the image display unit 1 sends a connection request to the terminal unit 2 a predetermined number of times after the power of the apparatus is turned on, if there is no response from the other party, the image display unit 1 determines that the other party terminal unit has not been started up, and A mode for monitoring reception of command data from the section 2 is entered. Then, the power of the terminal unit 2 is turned on and I
When the D request is sent, the control shifts to control for returning the connection request.

That is, in the present embodiment, communication is basically established with the terminal unit 2 as the master and the image display unit 1 as the slave.

As described above, it has been described that the terminal unit 2 stops the access after trying the connection a predetermined number of times, and issues a connection request from the image display unit 1. However, the terminal unit 2 always keeps accessing regularly and displays the image. The unit 1 may not always voluntarily transmit a command as a slave.

The ID is an identification symbol for specifying the hardware specifications of the image display unit, and is, for example, a maker & model number. The specifications represent hardware specifications of the image display unit 1. For example, the number of pixels of a display panel, a pixel array, color / monochrome, a device type, a screen size, an aspect ratio,
The number of gradations, gamma characteristics, displayable frame frequency, audio specifications, and the like are included. Further, items that can be adjusted in the image display unit are also included in the specifications.

The adjustment data includes, for example, contrast, color balance, brightness, black level, display position, display size, volume, balance, and the like, and may be changed during normal times. Adjustment information is exchanged between the image display unit 1 and the terminal unit 2. Further, the adjustment data also includes information on an adjustment right as to which of the items that can be adjusted by both the terminal unit 2 and the image display unit 1 is adjusted.

As will be described later, the terminal unit 2 stores the ID and the specification of the image display unit 1 already connected in a non-volatile memory (not shown) as a pair. For this reason, when the ID from the image display unit 1 is the same as the previous ID, the terminal unit 2 immediately resumes the normal processing without requesting the transmission because the specifications and the like are already held in the own device. Can be migrated.

In the image display unit 1, the data before the power is turned off is stored in a display unit CPU 10 (not shown) in the image display unit.
1 is stored in a non-volatile memory provided therein, and is read out and reproduced when the power is turned on. Or,
The read adjustment data is transmitted from the image display unit 1 to the terminal unit 2, and the terminal unit 2 and the image display unit 1 perform an adjustment process according to the above-mentioned adjustment right.

The details of the above-described control at the time of power-on will be described with reference to FIGS. FIG. 8 is a flowchart showing control when the power of the terminal unit 2 is turned on in the present embodiment, and FIG. 9 is a flowchart showing control when the power of the image display unit 1 is turned on in the present embodiment.

First, control of the terminal unit 2 will be described with reference to FIG. When the power is turned on, the terminal unit 2 shifts to the control of FIG. 8 and executes the power-on control procedure according to the determined communication control procedure.

First, in step S1 of FIG. 8, an ID request (connection request) command is transmitted to the connected image display unit 1. Then, in subsequent step S2, it is checked whether or not the ID from the image display unit 1 has been received. ID
If not received, the process proceeds to step S3, and it is determined whether or not a predetermined time has elapsed. If the predetermined time has not elapsed, the process returns to step S2, and the reception of the ID within the predetermined time is monitored. If the ID has not been sent from the image display unit 1 after the lapse of the predetermined time, the process proceeds to step S4, and the ID request command is sent to the image display unit 1 for a fixed number of times I
It is checked whether the D request command has been sent, for example, n times.
If it has not been sent a certain number of times, the process returns to step S1 and sends an ID request command again.

On the other hand, if the ID request command has been sent a certain number of times in step S4, the process returns to step S2,
It monitors the ID (connection request) sent from the image display unit 1. When the ID from the image display unit 1 is received, the process proceeds from step S2 to step S5, where the received I
It is checked whether D is an ID already known to the terminal unit 2 and whether the specification of the connected image display unit can be grasped.

If it is not a known display, step S5
The process further proceeds to step S6, and it is checked whether or not the default switch indicating the standard monitor recommended as the standard image display unit of the terminal unit 2 is ON (whether or not the standard monitor is connected). If the monitor is not the standard monitor, the process proceeds to step S7, and a specification request command is transmitted to the image display unit 1. Subsequently, in step S8, it is checked whether or not the specifications from the image display unit 1 have been received. If the specification has not been received, the process proceeds to step S9 to check whether a predetermined time has elapsed. If the predetermined time has not elapsed, the process returns to step S8, and the reception of the specification within the predetermined time is monitored. If the specifications have not been sent from the image display unit 1 even after the lapse of the predetermined time, the process proceeds to step S10, where a request is made a certain number of times, and it is checked whether or not the specifications were not received within the predetermined time. If the request has not been received after a certain number of requests, the process returns to step S7 to transmit the specification request command again.

On the other hand, if the specification has not been received after requesting a predetermined number of times in step S10, the image display unit 1
It is determined that the power supply has been turned off or has become inoperable, and the process returns to step S1 to shift to the process of transmitting an ID request command to the image display unit 1.

On the other hand, when the specification information is received from the image display unit 1 in step S8, the process proceeds to step S11, and it is checked whether the received specification is a specification applicable to the terminal unit 2. If the specifications can be processed, step S15
Proceed to.

On the other hand, if the specifications cannot be processed in step S 11, the process proceeds to step S 12, and the specifications that are considered to satisfy the most received specifications among the specifications applicable in the own terminal unit 2 are selected. Then, in the following step S13, the selected specification information is displayed together with the error display. Then, the process proceeds to step S15.

On the other hand, if the ID indicating the known image display unit is received in step S5,
If it is determined in step S6 that the standard monitor is connected, the process proceeds to step S14, where the determined specification is selected, and the process proceeds to step S15.

In step S15, the specifications of the selected image display unit 1 are stored in a non-volatile memory (not shown), and the flow advances to step S16. In step S16, the image display unit 1 is requested to transmit necessary adjustment data based on the selected specifications. Subsequently, in step S17, it is checked whether or not the adjustment data from the image display unit 1 has been received. If the adjustment data has not been received, the process proceeds to step S18 to check whether a predetermined time has elapsed. If the predetermined time has not elapsed, the flow returns to step S17, and the reception of the adjustment data within the predetermined time is monitored. If the adjustment data has not been sent from the image display unit 1 even after the lapse of the predetermined time, the process proceeds to step S19, and a request is made a certain number of times, and it is checked whether or not the specification has not been received within the predetermined time.
If the request has not been received after a predetermined number of requests, the process returns to step S16, and the adjustment data request command is transmitted again.

On the other hand, if the adjustment data has not been received after requesting a predetermined number of times in step S19, it is determined that the power of the image display unit 1 has been turned off or has become inoperable, and the process returns to step S1. The process proceeds to a process of transmitting an ID request command to the image display unit 1.

On the other hand, when the adjustment data is received in step S17, the specifications of the image display unit 1 can be grasped from the received data, and thereafter, the process shifts to a normal process according to the specifications of the image display unit 1 shown in step S20. I do.

Next, control of the image display unit 1 will be described with reference to FIG. When the power is turned on, the image display unit 1 shifts to the control of FIG. 9 and executes a power-on control procedure (command reception control procedure) according to a determined communication control procedure.

First, in step S31 of FIG. 9, the timer for measuring the communication response time is reset. Then, it is checked in step S32 whether a command has been received.
If the command has not been received, the process proceeds to step S33,
Check whether a predetermined time has elapsed. If the predetermined time has not elapsed, the process returns to step S32, and the reception of the command within the predetermined time is monitored. If the command has not been received from the terminal unit 2 even after the lapse of the predetermined time, the process proceeds to step S34, and a connection request including the ID of the own device is transmitted to the terminal unit 2. Then, the process returns to step S31.

On the other hand, if a command from the terminal unit 2 has been received in step S32, the flow advances to step S35 to analyze the received command. Subsequently, in step S36, it is determined whether or not the analyzed command is an ID request command. If it is an ID request command, step S3
Proceeding to 7, the ID of the own device is returned to the terminal unit 2, and the process returns to step S31.

On the other hand, if the analyzed command is not an ID request command in step S36,
Then, the process advances to step 38 to determine whether or not the received command is a specification request command.
If it is a specification request command, step S39
And returns the specification information of the own device to the terminal unit 2 and returns to step S31.

On the other hand, if the command analyzed in step S38 is not a specification request command, the flow advances to step S40 to determine whether or not the command is an adjustment data request command. If the received command is an adjustment data request command, the process proceeds to step S41, in which the adjustment data of the own device is returned to the terminal unit 2, and the process returns to step S31.

On the other hand, if the command analyzed in step S40 is not an adjustment data request command, the flow advances to step S42 to determine whether or not idle communication (ENQ) is performed. If it is not "ENQ", it is determined that the command is an invalid command that cannot be executed by the own device, and the process proceeds to step S43. It returns to S31.

On the other hand, if the analyzed command is idle communication (ENQ) in step S42, the flow advances to step S44 to return "ENQ" and shift to normal communication processing.

An example of the configuration of a communication packet used for transmission and reception of command data and the like used in the above communication control will be described below with reference to FIG. FIG. 10 is a diagram showing an example of a communication packet configuration used for communication control when the power is turned on in the present embodiment.

In the present embodiment, since the specifications of the partner devices have not been determined, for example, bit synchronization during mutual communication cannot be established. For this reason, it is desirable to perform asynchronous (start-stop synchronization) communication in which a start bit and a stop bit are added before and after the transmission / reception data so that the data can be received in synchronization with each transmission / reception of data.

The communication control procedure is, for example, ISO
1745 or the like can be adopted, SOH 501 indicating the start of the heading of the information message, command data 502 and the number of data 503 constituting the heading, STX 504 indicating the start of the text and the end of the heading, and one set of data corresponding to the item number. The text data group 505 includes an ETX 506 indicating the end of the text, and a checksum (BCC) 507 for checking whether the transmission of the text data has been performed without error.

The command code 502 includes an ID request command, an ID transmission command, a specification request command, a specification transmission command, an adjustment data request command,
An adjustment data transmission command, a channel selection command, and the like are included. If a video printer is further connected, a video print command is included as described later.

This packet configuration can be used not only for power-on control but also for transmission and reception of command data in other normal communications. In this case, when transmitting and receiving a set of an item number and corresponding item data as data to be transmitted as text data, by controlling to transmit and receive only data items having a change in the data items, the amount of transmitted / received data is reduced. Can be reduced.

In this case, a confirmation packet indicating that the update data item from the partner device has been received, for example, “AC
It is necessary to control the transmission of the change item data to be completed only after receiving the "K" packet.

In the above description, an example in which item data corresponding to a data item number is transmitted as text data has been described. However, the present invention and the present embodiment are not limited to the above examples, and are, for example, fixed-length packets whose packet length is uniquely determined by a command code,
In the case where all items are transmitted even if only one item is changed, communication of command data may be performed using fixed-length packets shown in FIG.

In this case, as compared with the case of FIG. 10, the number of data 503 becomes unnecessary, and if the order of the items is determined, the transmission of the item number becomes unnecessary. Therefore, SOH 511, command code 512, STX 514, data 515, ETX
516 and a checksum (BCC) 517.

When the power ON process is completed as described above, the process shifts to a normal communication process. In the normal processing, the communication speed of each other, the synchronization signal (VSYNC, HSY) between each other
Since the transmission / reception timing of (NC) is uniquely determined, thereafter, various communication controls are performed in accordance with the synchronization signal.

The basic data communication format of this embodiment will be described with reference to FIGS. FIG. 12 is a diagram showing a data configuration in a unit cycle according to the present embodiment, and FIG. 13 is a diagram showing an example of a packet configuration when transmitting and receiving command data. In the example of FIG. 13, a fixed-length packet will be described. FIG. 14 is a diagram showing a format example of the adjustment data.

In the present embodiment, image data and audio data are communicated in a unit cycle shown in FIG. This unit cycle is the horizontal synchronization signal (HSYNC) of the video signal.
This is the period or the period of the vertical synchronization signal (VSYNC).

The unit cycle is the first synchronization code (H number)
601; second n image data (serial) 602;
The third sound data 603 and the fourth command data (bidirectional control) 604 are used.

The detailed packet structure of the fourth command data 604 can be, for example, the structure shown in FIG.
Header section 65 indicating what command data it is
1, a data area 652, and a checksum 653.

FIG. 14 shows an example of adjustment data as an example of the configuration of this data section. FIG. 14A shows an example of adjustment data from the image display unit 1 to the terminal unit 2, and FIG.
5 is an example of adjustment data for the image display unit 1.

The adjustment data from the image display unit 1 to the terminal unit 2 includes display type data, a command indicating an adjustment mode, a command indicating an adjustment right, contrast setting data, color temperature setting data (G, B, R), Brightness setting data, black level setting data (G, B, R), gamma adjustment data (G, B, R), display mode setting data, horizontal / vertical display size setting data, horizontal / vertical display position setting data, volume setting Data, volume left / right balance setting data, display unit audio specification setting data, and the like.

On the other hand, the adjustment data from the terminal unit 2 to the image display unit 1 includes received signal type data, a command indicating an adjustment mode, a command indicating an adjustment right, contrast setting data, and color temperature setting data (G, B, R), brightness setting data, black level setting data (G, B, R), gamma adjustment data (G, B, R), display mode setting data, horizontal / vertical display size setting data, horizontal / vertical display position setting data , Volume setting data, volume left / right balance setting data, and the like.

Next, the setup process executed first in the normal processing operation mode of the present embodiment in which the above power-on process has been completed will be described below with reference to the flowcharts of FIGS. FIG. 15 is a flowchart showing a setup process of the operation mode of the terminal unit 2 in the present embodiment, and FIG. 16 is a flowchart showing a setup process of the operation mode of the image display unit 1 in the present embodiment.

When the terminal unit 2 receives the specification information and the adjustment data of the connected image display unit 1 by the power-on process shown in FIG. 8, the process proceeds to the operation mode setup process shown in FIG. First, in step S51, the terminal CPU 20
1 determines an input signal based on input signal determination data from the input I / F section 220. Subsequently, in step S52, specific data of the image display unit 1 is acquired based on the adjustment data and the like.

Then, in the following step S53, the image processing mode is determined from the acquired data, and the audio processing mode is specified. For example, if the image processing mode is NT
Specify the SC processing mode, and set the audio processing mode to the stereo mode.

Next, in step S54, control is performed so as to generate a timing signal at a signal processing timing corresponding to the processing mode determined by instructing the timing generation unit 204.

In step S55, a communication (transmission) processing timing is generated.
03, the communication direction control timing, the timing of generating an interrupt signal to the terminal CPU 201 for command transmission / reception, the video signal processing unit 205 and the audio signal processing unit 2
10 and an enable signal for time-division multiplexing of each processing data such as a command data processing timing by the terminal CPU 201 are set so as to perform the communication control shown in FIG. Then, data communication is performed according to this processing timing.

On the other hand, in the image display unit 1, when the specification information of the image display unit 1 is transmitted to the connection terminal unit 2 by the power-on process shown in FIG. 9 and the adjustment data and the like are shared, the operation mode setup shown in FIG. Move on to processing. First, in step S61, the display unit CPU 101 determines an operation mode of the timing generation unit 104. Then, it monitors that the display modem 103 detects the synchronization signal from the terminal unit 2 at the timing according to the determined operation mode.

When the display modem 103 receives the synchronization signal from the terminal unit 2, a reproduced SYNC signal and a reproduced CLK signal are output. For this reason, the terminal unit 2
When the synchronization signal is received, the process proceeds from step S62 to step S63 to generate a transmission processing timing. For example, each of a communication direction control timing to the display modem 103, an interrupt signal generation timing to the display CPU 101 for command transmission / reception, a command data processing timing by the video signal processing unit 105, the audio signal processing, and the display CPU 101, etc. An enable signal for time division multiplexing of the processing data is generated.

In step S64, a signal processing timing is generated to control the received video signal and the like to a receivable state.
It controls reception of audio signals (sound signals) and transmission and reception of command data.

When the setup process is completed as described above, the terminal unit 2 performs data communication with the image display unit 1 in synchronization with the synchronization signal sequentially in response to the generation of display data from the input I / F 220. Will be.

An example of data communication timing between the terminal unit 2 and the image display unit 1 when an image in the NTSC format is input to the input I / F 220 and the display panel 110 of the image display unit 1 is 852 dots × 480 dots. This will be described below with reference to FIGS. FIG. 17 is a diagram showing an example of data communication control timing within a vertical synchronizing signal generation cycle between the image display unit 1 and the terminal unit 2 of the present embodiment, and FIG. FIG. 4 is a diagram illustrating an example of data communication control timing within a horizontal synchronization signal generation cycle with a terminal unit 2;

In this embodiment, as shown in FIG. 17, valid video data is transmitted at the timing described above in synchronization with the VSYNC signal and the HSYNC signal. In the present embodiment, the display panel 110 has 852 dots ×
Since it is 480 dots, 480 lines of video data are transmitted and received between VSYNC signals.

In the present embodiment, the DIR signal for controlling the communication direction is set to a high level except for a certain period immediately before the VSYNC signal output timing, and the communication direction control of the command is performed by the terminal unit 2 to display the image from the terminal unit 2 in principle. The transmission direction to the unit 1 is set.

As a specific command transmission / reception timing, VSYN
Utilizing the fact that there is no valid video data transmission timing before and after the C signal, the VSYNC signal output timing is used as the actual command transmission timing from the terminal unit 2 to the image display unit 1 at the VSYNC signal timing shown in FIG.
A transmission command enable signal is output at a predetermined timing between SYNCs. Note that the example of FIG. 17 shows an example in which commands for two blocks are transmitted.

Further, the command transmission timing from the image display unit 1 to the terminal unit 2 is set to a predetermined timing during two cycles of HSYNC immediately before the VSYNC signal timing, and a reception command enable signal is output. Note that, in the image display unit 1, the transmission / reception enable timing is the reverse timing of FIG.

The data transmission timing between HSYNCs is as follows.
As shown in FIG. 18, L-channel audio data and R-channel audio data are transmitted and received using the period from the HSYNC signal timing to the video data communication timing. Then, when the video data valid timing comes, image data of 852 dots for one line in the horizontal direction is transmitted and received.

As described above, in the present embodiment, VSYN
Video data and audio data (audio data) to be displayed between the C signals can be multiplexed and transmitted and received, and if necessary, command data can also be multiplexed and transmitted and received.

By the above processing, various control timings to be executed by the terminal unit of the present embodiment are determined. Details of the adjustment control according to the specific specifications of the image display unit 1 will be described below.

The transmission format is determined by characteristic data (resolution, pixel arrangement, screen aspect, refresh rate) of the display panel 110. Further, the horizontal cycle is determined by setting (the number of display lines + necessary blanking period) during the refresh rate (vertical synchronization frequency). For example, 480 display lines in 60 Hz, blank period 4
It decides to use five or the like.

When the input signal format is the same, the output can be performed without performing any special conversion processing. However, if a large amount of command data (control signal) needs to be communicated here, the blank period may be increased.

Further, in one horizontal cycle, (the number of display pixels +
Multiplexed audio data + required blanking period)
Is calculated, and the frequency of the master CLK is determined. Here, if the input signal format is the same, the CLK signal of the input information can be used as it is. However, if there are many blank periods in the input format and it is desired to lower the frequency, the input CLK signal must be changed as necessary.

Further, the arrangement of the video data / audio data during the horizontal period and the arrangement of the video data / control signal data during the vertical period are determined, and the terminal unit 2 sends the determined contents to the image display unit as necessary. Send as data,
Recognize each other and share the recognition result.

In determining the refresh rate, if the refresh rate characteristic of the image display unit 1 is sufficiently high, the refresh rate is adjusted to the refresh rate of the input signal to the input I / F 220. However, the user I / F 23
When the user requests to increase the refresh rate by an instruction such as 0 or 130, the refresh rate may be increased. For example, when the flicker characteristic is improved / interlacing is changed to progressive, or the like.

Further, when the screen aspect ratio of the display panel 110 does not match the aspect ratio of the input signal to the input I / F 220, the display mode can be changed by automatic discrimination or at the request of the user. I have.

The transmission specifications are determined in this manner. In the present embodiment, an example in which the transmission specifications are changed according to the specifications of the display panel 110 of the image display unit 1 connected to the terminal unit 2 will be described below. Will be described.

The display panel 110 has 852 dots × 480.
FIG. 19 shows an example in the case of a dot (R, G, B stripe). In this case, as shown in FIG. 19, the vertical synchronization (VSYNC) frequency is set to about 60 Hz, and 1 VSYNC is used.
525 HSYNC signals are generated during the period, and 480 HS clocks from the 36th from the generation of the VSYNC signal are generated.
The YNC period is an effective video data period.

The horizontal synchronization signal (HSYNC) has a frequency of 3
1.5 KHz, clock signal (CLK signal) has frequency 3
3.1 MHz, which is 1052 in one HSYNC period.
CLK signals are generated, and video data is communicated by 852 of the 126th from among the generation of the HSYNC signal.

The display panel 110 is 640 dots ×
FIG. 20 shows an example in the case of 480 dots (R, G, B stripes). In this case, as shown in FIG. 20, the vertical synchronization (VSYNC) frequency is set to about 60 Hz, and 1 VSY
525 HSYNC signals are generated during the NC period, and 480 HSYNC periods from the 36th HSYNC signal after the VSYNC signal generation are set as the effective video data period.

The horizontal synchronization signal (HSYNC) has a frequency of 3
1.5 KHz, clock signal (CLK signal) has frequency 2
At 4.9 MHz, 790 CLK signals are generated during one HSYNC period, and video data is communicated to 640 of the 95th clock signal from the generation of the HSYNC signal.

FIG. 21 shows an example in which the display panel 110 has 1365 dots × 768 dots (R, G, B stripes). In this case, as shown in FIG. 21, the vertical synchronization (VSYNC) frequency is About 60Hz, 1VS
807 HSYNC signals are generated during the YNC period, and 768 of the 768 HSYNC signals from the 31st HSYNC signal are generated from the generation of the VSYNC signal.
Is an effective video data period.

The horizontal synchronization signal (HSYNC) has a frequency of 4
8.4 KHz, clock signal (CLK signal) has frequency 8
1.5 MHz, which is 1885 in one HSYNC period
CLK signals are generated, and the video data is communicated by 1365 of the 201th from among the generation of the HSYNC signal.

When the image display unit 1 has a memory for temporarily storing video data transferred therefrom,
In this manner, the display timing of the display panel 110 and the video data transfer timing do not necessarily have to coincide with each other. For example, as shown in FIG. 22, the frequency of the blanking time horizontal transfer clock (CLK) is changed to make the transfer slower. You may. For example, as shown in FIG.
The frequency of the clock signal (CLK signal) may be set to 67.8 MHz so that 1365 dots of video data can be transferred during the HSYNC period so that 1400 CLK signals are generated during the period.

When the transfer rate is reduced, noise becomes stronger, and a decrease in display image quality can be effectively prevented. Further, the terminal unit 2 of the present embodiment determines the processing specification of the audio signal based on the speaker specification of the image display unit 1.

For example, if the image display unit 1 has only one speaker 123 in monaural specification, the audio data is data for one channel.

On the other hand, when the image display unit 1 has two speakers 123 and the audio amplifier 122 has an independent two-channel amplifier circuit for each speaker, the left (L) right (R) stereo audio data. Further, when the data is multi-channel surround data, it is determined that audio data for a necessary channel is transferred according to the surround specification.

When the input signal to the input I / F 220 is a digital input, asynchronous audio is synchronized and horizontally multiplexed. Alternatively, the communication audio data can be changed in accordance with a user request (for example, a user wants to hear a main sound from left and right speakers).

The specific processing method of the video data is also determined according to the specific data of the image display unit. For example, in accordance with the characteristic data of the display panel 110, the quantization precision is determined so that the number of gradations matches the display gradation.

The gamma (γ) characteristic of the display device is subjected to processing such as non-linear conversion so that the gamma (γ) characteristic of the display device matches the light emission characteristic of the display panel 110 in addition to the number of gradations. For example, when the light emission luminance is controlled by PWM modulation, a linear characteristic is obtained. Therefore, control such as performing only inverse γ is performed.

As for the color temperature of the display device, since the reproduced white color temperature differs depending on the specifications of the display unit, the R / G / B balance is adjusted so as to obtain a desired color temperature. Change the enhancer to be optimal for the screen size and resolution. The processing changes depending on the input signal or the user's request.

Similarly, when the resolution, the pixel arrangement, the display aspect, the refresh rate, and the format of the input signal are different from the transmission format, the resolution is converted so as to be suitable.

The user I of the present embodiment described above
The / Fs 130 and 230 can be adjusted by inputting instructions on image quality adjustment and sound adjustment to an operation panel provided in the apparatus, and can be remotely operated by, for example, a system remote controller.

That is, the terminal unit 2 and the image display unit 1 share the user adjustment data (remote control or key switch operation) and share the operation input result with each other by transmitting and receiving command data, so that it is possible to respond to any user request. Is also configured to be able to handle. That is, in the communication command data of the present embodiment, the operation input result (remote control or key switch operation) for one of the user I / Fs is controlled so as to be transferred to each other. However, it can be controlled in exactly the same way.

For example, the user I / F 13 of the image display unit 1
A tuning operation of the tuner unit 240 of the terminal unit 2 is also possible by inputting an instruction for 0.

However, in the present embodiment, the image display unit 1
According to the specifications of the video signal processing unit 10 of the image display unit 1.
5 or should it be adjusted by the panel drive unit 106?
Alternatively, the video signal processing unit 205 of the terminal unit 2 previously determines whether it is better to make adjustments, and gives the right of adjustment to the one determined to be optimal. That is, when the terminal unit 2 and the image display unit 1 have the same adjustment function, the data for determining which one performs the adjustment is exchanged, and the optimum adjustment is performed.

An example of the result of the distribution of the adjustment right according to the present embodiment is shown below.

The terminal 2 adjusts the contrast.

Color adjustment is performed by the terminal unit 2.

The color temperature is adjusted by the image display unit 1.

The image display unit 1 adjusts the volume.

The enhancer adjustment is performed by the terminal unit 2.

In the distribution of these adjustment rights, an adjustment right is given to a person who can easily make an adjustment for obtaining an optimum result or a person who can obtain a better result. When an adjustment instruction having no adjustment right is detected, the detection result of the adjustment instruction having the adjustment right is transferred to at least the other party at the transmission timing of the command data without performing the adjustment in the own device.

If the instruction is an adjustment instruction having an adjustment right for the apparatus, the adjustment result may be transferred to the other party after the adjustment is performed in the apparatus itself.

[Modification of First Embodiment] In the first embodiment described above, video data,
As shown in FIGS. 17 and 18, multiplexing of audio data (audio data) and command data
The example in which the SYNC signal is multiplexed between the video data valid timings and the command data is multiplexed between the VSYNC signals between the HSYNCs outside the video data valid period has been described.

However, the present invention is not limited to the multiplex timing described above. For example, instead of dividing audio data into timings for each HSYNC and communicating, audio data is collectively communicated for each VSYNC timing. May be controlled as follows.

As described above, the audio data is not divided and transmitted at the timing of each HSYNC.
FIG. 2 shows an example of a communication timing between the terminal unit 2 and the image display unit 1 when control is performed such that communication is performed collectively at each C timing.
3 is shown.

In the example shown in FIG. 23, audio data is communicated collectively at HSYNC timing between video data valid timings after the arrival of the VSYNC signal.

Such communication timing is effective when the image display unit 1 is provided with a memory capable of temporarily storing audio data.

Further, in the first embodiment described above, an example has been described in which command data is multiplexed between HSYNCs outside the video data valid period between VSYNC signals. However, the present invention is not limited to the multiplexing timing described above.
The communication may be controlled so as to be divided at the timing of each SYNC.

As described above, the command data is not communicated collectively at the timing of each VSYNC.
FIG. 2 shows an example of the communication timing between the terminal unit 2 and the image display unit 1 when the communication is controlled so as to be divided for each C timing.
It is shown in FIG.

In the example shown in FIG. 24, after the communication timing of audio data is completed, the command data is communicated by dividing it into, for example, one word at a time between video data valid timings. In this case, several HS
One packet of command data is transmitted in the YNC period.

Such communication timing is used for communication of command data that needs to be communicated urgently or for communication of a small amount of communication command data such as only data to be changed among various data. Suitable for.

Further, in the example shown in FIG. 17, the communication timing of the command data is, for example, two times of the HSYNC period and the VSYNC signal arrival period immediately before the arrival of the VSYNC signal. However, the present invention is not limited to the above example, and the command data may be controlled so that the command data can be communicated in all periods except the video data valid period and the audio data communication period. FIG. 25 shows an example of the communication timing between the terminal unit 2 and the image display unit 1 in the case of performing the control as described above.

In the example shown in FIG. 25, the command data is
The required number of transmissions can be performed at once in the SYNC period. This is effective when not only the change information but also all information is communicated as command data.Even if a communication error occurs or a packet is discarded, the effect is minimized. Can be minimized.

[Second Embodiment] In the first embodiment described above, one image display unit is connected to the terminal unit 2 and nothing is connected to the image display unit 1. Not explained examples. However, the present invention is not limited to the above-described example, and an image displayed on the image display unit by connecting another optional device, for example, a video printer or the like to one terminal unit or the image display unit. You may comprise so that a hard copy of data etc. can be performed. In addition,
Since the configuration of the second embodiment is the same as that of the first embodiment except for the configuration described below, detailed description of such portions will be omitted.

A second embodiment according to the present invention in which another optional device, for example, a video printer or the like is connected to one terminal unit or image display unit, will be described below with reference to FIGS. 26 to 28. I do. In the second embodiment,
The same reference numerals are given to the same components as those in the first embodiment described above, and the detailed description will be omitted. Also in the second embodiment, transmission and reception of various data between the image display unit 1 and the terminal unit 2 are the same as in the first embodiment.

FIG. 26 is a diagram for explaining an example of a basic system configuration according to the second embodiment of the present invention. FIG.
As shown in FIG. 6, in the second embodiment, the terminal unit 800 performs necessary conversion processing on the input signal in accordance with the specifications of the image display unit 1000, and performs image conversion on the image display unit 1000 via the connection unit 900. Output to

The image display unit 1000 displays the optional device 1
The terminal unit 800 can transfer data to the optional device 1100 via the connection unit 900 and the image display device 1000.

Further, in the example of FIG. 26 described above, the optional device 1100 is connected to the image display unit 1000. However, the optional device can also be connected to the terminal unit 800 of the second embodiment. The configuration shown in FIG. 27 may be adopted. In the following description, an example in which optional devices can be connected to both the terminal unit 800 and the image display unit 1000 will be described. However, the present invention is not limited to the above example. Alternatively, it is needless to say that a case where optional equipment can be connected to only the terminal unit 800 is also included in the present invention.

FIG. 28 shows a detailed configuration example of the second embodiment shown in FIG. 26 or FIG. FIG. 28 is a block diagram showing a detailed configuration of the second embodiment. FIG.
In FIG. 8, FIG. 2 showing the first embodiment described above
The differences from the configuration shown in FIG.

In the image display unit 1000, in addition to the configuration shown in FIG.
A dedicated connection line for the optional device 1100 is connected, and a signal from this dedicated connection line is input to the external modem 651. The external modem 651 demodulates the signal from the terminal unit 800 and outputs it to the external I / F 653.
The signal from the external I / F 653 is the external modem 651
And output to the dedicated connection line.

An external timing generator 652 is provided, and an external I / F is controlled by the display CPU 101.
Terminal unit 8 using the external modem 651
Communication control with 00 is performed.

The external I / F 653 is connected to the external input / output terminal 65.
4 and an interface with an optional device 1100, for example, a video printer device.

On the other hand, in the terminal unit 800, the signal processing unit 601 realizes both functions of the video signal processing unit 205 and the audio signal processing unit 210 shown in FIG. The terminal modem A203 implements the same function as the terminal modem of FIG. On the other hand, the terminal modem B 602 is a terminal modem used for communication with the optional device 1100 connected to the image display unit 1000.

The timing generator A603 realizes the same function as the timing generator 204 shown in FIG. The timing generation unit B 606 receives a clock signal and a synchronization signal from the timing generation unit A 603 according to the control of the terminal CPU 201, and outputs a control timing signal of the terminal modem 602 or the D / A converter 607 by synchronizing the clock signal and the synchronization signal as necessary. I do.

The D / A converter 607 does not output data with the optional device 1100 like a video printer, but inputs data from the optional device 1100 via the external I / F 653 and the external modem 651 to the terminal unit. A D / A converter provided for the case where data is sent at 800, performs D / A conversion on data output from the terminal modem B 602, and outputs the data to the terminal output terminal 609.

Alternatively, an output signal from the D / A converter 607 can be sent to the image processing unit 1000 via the signal processing unit 601 and the terminal modem A203 via the selector 608.

Also in the second embodiment having the above configuration, when the terminal unit 800 and the image display unit 1000 are powered on and the optional device 1100 is also powered on, the terminal unit 800 and the As with the power-on process shown in FIGS. 8 and 9 of the first embodiment described above, the I / O
D, specifications, and adjustment data are shared, and the terminal modem B 602 and the external modem 6 are shared in the same manner as in FIGS.
The data transmission specifications for the necessary optional devices are determined by determining the data transmission specifications between the devices 51.

When the optional device 1100 is a video printer, it outputs video data to be printed out or print data for the optional device.

Although the example in which the optional device 1100 is a video printer has been described above, the present invention is not limited to this, and may be a video output device such as a video deck. In this case, a video signal from the optional device 1100 is input to the external input / output terminal 654 and the external I / O
F653, data is transmitted to the terminal unit 800 via the external modem 651.

On the other hand, the terminal unit 800 is connected to the terminal unit modem B6.
02 is converted into the same format as that input to the external input / output terminal 654 of the image display unit 1000 by the D / A converter 607, and is output to the external output terminal 809 of the terminal unit 800. For example, the image display unit 1000
When the external input / output terminal 654 and the external output terminal 609 of the terminal unit 800 include an RCA pin jack connector and a DV connector, the signal is output from the terminal unit 800 in a signal format indicated by the connector used for the input of the image display unit 1000. .

The signal input to the external input / output terminal 608 of the image display unit 1000 is transmitted to the terminal unit 800, and the signal processing unit 601 performs signal processing on the terminal unit 800 side so as to meet the specifications of the image display unit 1000. And the terminal modem A203
Can be sent back to the image display unit 1000 again.

[Third Embodiment] In the second embodiment described above, the optional device 1100
In connection with the above, an example in which a dedicated modem and a connection line are provided for the optional device 1100 has been described. However, if the optional device is a device that does not need to send and receive a large amount of information in real time, such as when the optional device is a video printer, a modem dedicated to the optional device 1100 is not necessarily required.
And connection lines need not be provided.

For example, even when an optional device is connected to the image display unit, control is performed such that information for the optional device is multiplexed and communicated using the idle time of information communication between the terminal unit and the image display unit. Good.

As described above, even when the optional device is connected to the image display unit, the multiplexing is performed so that the communication between the optional device and the terminal unit is performed during the idle time of the communication between the terminal unit and the image display unit. A third embodiment according to the present invention will be described with reference to FIGS. 29 and 30. In addition,
The configuration of the third embodiment is the same as that of each of the above embodiments except for the configuration described below, and a detailed description of such portions will be omitted.

In the third embodiment, FIG. 29 is a block diagram showing the configuration of the third embodiment according to the present invention, and FIG. 30 explains the information communication timing of the third embodiment. FIG.

Also in the third embodiment shown in FIG. 29, the basic configurations of the terminal section and the image display section can be handled by the same configurations as those in the first embodiment shown in FIG. Then, in the third embodiment shown in FIG.
The following configuration is added to 400 or the image display unit 1500 in addition to the configuration of FIG.

That is, the image display unit 1500 includes an external I / F 1410 that controls an interface with the optional device 1100 and receives communication data from the display unit modem 103 to the optional device 1100. Also, the external I / F 15 that controls the interface with the optional device 1100 by the terminal unit 1400 and receives communication data from the terminal modem 203 to the optional device 1100.
10 is provided.

The input / output timing from the terminal modem 203 (from the display unit modem 103) is controlled to be the timing shown in FIG.

The control timing shown in FIG. 30 is different from the control timing of the first embodiment shown in FIG. 17 in that the terminal modem of terminal unit 1400 is used to newly multiplex information for optional equipment 1100. The transmission command enable signal 203 is transmitted to the image display unit 1500 at the HSYNC period shown in FIG. 30A and the command data reception timing from the image display unit 1500 when the DIR signal is at a low level, and valid video data communication. Control is performed such that data is transmitted to the optional device 1100 using the period shown in FIG.

For example, when the optional device 1100 is connected to the image display unit 1500, the timing generator 104 sends the external I / F 1510 to the external I / F 1510 from the display unit modem 103 at the timing shown in FIG. It receives the demodulated data and outputs a timing signal for sending to the optional device 1100.

For example, in the example shown in FIG. 30, a period of about 20 lines can be secured in (B), and if 20 lines are transmitted at about 60 Hz, data of one frame can be transmitted in less than one second. . When the data is divided and transmitted in this way, it is desirable to add a line number to the beginning each time one line of data is transmitted so that it is possible to determine how far the data has been transmitted.

If the image display unit is provided with a separate frame memory, the data transferred for this optional device is written in this frame memory, and when all the data are ready, the connection option Control may be performed so that the data is transferred to the device. Alternatively, when the display data on the own display screen is held as frame data, a command to output the held data to the optional device may be received from the terminal unit.

By providing the frame memory for external output in the image display unit in this manner, it becomes possible to output information in accordance with the specifications of the optional devices connected to the image display unit, and the restrictions on the connected optional devices are greatly reduced. And can be made highly versatile.

Further, upon receiving the command data transmission request from the optional device 1100, the external I / F 1510 instructs the display unit CPU 101 to set the command data transmission timing from the optional device 1100 during the period (B). Alternatively, the command data from the optional device 1100 is mixed with the transmission during the command data transmission period from the image display unit 1500 to the terminal unit 1400 and then transmitted. For example, in this case, control is performed such that the ID of the optional device 1100 is included in the header portion so that it is possible to determine the transmission source.

Further, the optional device 1 is connected to the terminal 1400.
100 is connected, the timing generator 204
When the timing shown in FIG. 30B is reached, the external I / F 1410 receives the demodulated data from the terminal modem 203 and outputs a timing signal for sending it to the optional device 1100.

Upon receiving a command data transmission request from the optional device 1100, the external I / F 1410 instructs the terminal CPU 201 to issue a command data transmission request.
Requests reception of command data from 0.

By controlling as described above, it is possible to control the optional equipment without providing a modem for the optional equipment.

[Fourth Embodiment] In each embodiment described above, an example in which one image display unit is connected to the terminal unit 2 has been described. However, the present invention is not limited to the example described above, and the present invention includes a case where a plurality of image display units can be connected to one terminal unit. Further, it goes without saying that connecting the optional devices described in the second or third embodiment to them is also included in the present invention.

A fourth embodiment according to the present invention in which a plurality of image display units can be connected to the terminal unit will be described below with reference to FIGS. The configuration of the fourth embodiment is the same as that of each of the above-described embodiments except for the configuration described below, and a detailed description of such portions will be omitted.

FIG. 31 is a block diagram showing the configuration of the fourth embodiment according to the present invention. FIG. 32 shows the control of communication between the terminal unit and the image display unit in the VSYNC cycle according to the fourth embodiment. FIG. 33 is a timing chart for explaining communication control between the terminal unit and the image display unit in the HSYNC cycle according to the fourth embodiment.

First, the overall configuration of the fourth embodiment will be described with reference to FIG. In FIG. 31, 1600 is a terminal unit to which two image display units can be connected, 1700 is an image display unit A, and 1800 is an image display unit B. Image display section A1
700 and the image display unit B1800 may have the same configuration. FIG. 31 shows the detailed configuration of only the image display unit A1700.

The configuration of the image display unit A1700 is the same as that of the image display unit 1 shown in FIG. 2 described above, and the same reference numerals are given to each configuration.

The terminal unit 1600 includes two image display units 17
Since the display information needs to be transmitted to the image display devices 1700 and 1800, a configuration for communication with the image display devices 1700 and 1800 is provided.

The image display unit A1700 includes a terminal modem A1602, a signal processing unit A1604, and a timing generation unit A1606. The image display unit B1800 includes a terminal modem B1603, a signal processing unit B1605, and a timing generation unit B1607. And the terminal CPU 1601
Performs the same control on the image display units 1700 and 1800 as the above-described control on the image display units of the first embodiment.

That is, the terminal CPU 1601 performs power-on processing shown in FIGS. 8 and 9 with the respective image display units 1700 and 1800, and then performs setup processing of the operation mode shown in FIGS. It performs specification determination processing and the like.

When a common image is displayed on each image display unit and a common sound output is performed, the operations of the signal processing unit and the timing generation unit are shared by the image display units using a common input source. Just match it. On the other hand, when trying to display a completely different image on each image display unit, the input signal of the input I / F 220 may be appropriately distributed. Alternatively, the tuner unit 240 may be configured to have a double tuner configuration and display an independent television broadcast for each image display unit.

Even in such a case, the adjustment data is shared for each image display unit, and the user I / F on the image display unit side is used.
Since the user's instruction can be applied to, for example, the tuner unit 240 of the terminal unit, the control can be performed without any special configuration or operation.

The user I / F 23 of the terminal unit 1600
If the remote controller input detection mode to 0 is configured to be detectable for two types of remote controllers, and if the respective detection modes are assigned to the respective image display units, remote control for the terminal unit is also possible.

When an optional device can be connected to each image display unit or terminal unit, the configuration for the optional device shown in FIG. 29 is added to the configuration shown in FIG. 31, for example, as in the case of FIG. May be controlled. Alternatively, the configuration shown in FIG. 28 may be added to each image display unit or terminal unit.

An example of communication control timing between the terminal unit 1600 and the image display units 1700 and 1800 according to the fourth embodiment having the above configuration will be described with reference to FIGS. 32 and 33.

First, the communication control of the VSYNC cycle (vertical cycle) according to the fourth embodiment will be described with reference to FIG. The terminal unit 1600 according to the fourth embodiment has, for example, V
In the first HSYNC cycle (horizontal cycle) when the SYNC (vertical cycle) VSYNC signal arrives, for example, the image display unit A17
00, a transmission command enable signal for permitting command transmission to the image display unit B1 is output in the next HSYNC cycle.
The transmission command enable signal for permitting the transmission of the command to the command 800 is output.

Then, a reception command enable signal for permitting command reception from the image display unit A1700 is output in a predetermined HSYNC cycle after the end of valid video data transmission timing, and the image display unit B180 is output in the subsequent HSYNC cycle.
It outputs a receive command enable signal that permits command reception from 0. Thereby, the terminal CPU 1601
Can continuously process command communication with the image display units 1700 and 1800 without overlapping each other.

Next, the communication control of the HSYNC cycle (horizontal cycle) of the fourth embodiment will be described with reference to FIG.

In the example of FIG. 33, the upper part is the image display unit A17.
00 of the first embodiment is a display panel 1100 of FIG.
9, an audio signal for two channels is sent to the L / R two-channel stereo speaker at 852 dots × 480 dots. The lower part of FIG. 9 shows the display panel 1100 of the image display unit B1800 in the first embodiment. This is an example in which acoustic signals for four channels are transmitted to a four-channel speaker at 640 dots × 480 dots described in FIG.

Since the terminal unit 1600 has only one terminal CPU 1601, communication of command data with each image display unit is controlled so that communication timings do not overlap as shown in FIG. The generating unit is provided for each image display unit. Therefore, the terminal unit 1600 of the fourth embodiment can perform video data communication with completely different communication specifications for each image display unit without error.

As described above, according to the fourth embodiment, a plurality of image display units can be connected to the terminal unit, and even if the image display units have different display specifications, a special configuration is provided. It is possible to transmit display data and audio data with transmission specifications suitable for each image display unit without any.

[Fifth Embodiment] In the fourth embodiment described above, the terminal unit 2 is provided with an information communication modem for each of two connected image display units. Was explained. However, the present invention is not limited to the above-described example, and one image display unit can be connected to the terminal unit, and another image display unit or the like can be connected to the image display unit. The configuration is also included in the present invention.
Further, it goes without saying that connecting the optional devices described in the second or third embodiment to them is also included in the present invention.

The fifth embodiment according to the present invention in which the terminal unit is configured to be able to control a plurality of image display units via the image display unit, and to be able to connect another image display unit and the like to the image display unit. An embodiment will be described below with reference to FIGS. Note that the fifth embodiment is the same as the above-described embodiments except for the configuration described below.
A detailed description of such portions is omitted.

FIG. 34 is a block diagram showing the configuration of the fifth embodiment according to the present invention, FIG. 35 is a diagram for explaining the packet configuration used in the fifth embodiment, and FIG. FIG. 37 is a diagram for explaining a detailed configuration of the address command shown in FIG. 37, FIG. 37 is a diagram showing a state in which a plurality of image display units are connected in the fifth embodiment, and FIG. It is a flowchart for explaining.

In the fifth embodiment described below, the hardware configuration is simplified as much as possible, and the communication control procedure is changed so that many image display units can be connected to one terminal unit.

[0220] For this reason, the terminal unit 2000 uses the first
A hardware configuration similar to that of the third embodiment or a configuration similar to that of the third embodiment may be used. In the case of a configuration similar to that of the third embodiment, the external I / F
, An optional device, for example, a printer device can be connected.

On the other hand, the image display section is different from the image display section 1 of the first embodiment shown in FIG. 2 in that a driver circuit 150 is newly provided. The display unit is configured to be connectable.

Note that, as with the image display unit A2200, the external I / F 151 similar to that of the third embodiment may be provided so that optional devices can be connected to the image display unit. Further, the terminal unit is not the configuration shown in FIG.
Needless to say, it may have the same configuration as the terminal unit 1600 of the fourth embodiment shown in FIG. In this case, the transmission control procedure described later can be applied.
Therefore, in the following description of the transmission control procedure, a case where two image display units can be connected to the terminal unit and a printer is connected to the image display unit as an optional device will be described as an example.

[0223] In the fifth embodiment, the image display section comprises:
Only the control of transferring the communication data from the terminal unit to the next image display unit via the driver circuit 150 is performed, so that the detailed description of the hardware is omitted.

However, since the communication data output from the terminal unit 2000 is to be received by the modem units of all the connection devices, each receiving side has a configuration for determining whether or not the data is addressed to itself. .

Therefore, in the fifth embodiment, FIG.
The packet having the configuration shown in FIG. 5 is used for communication. The packet configuration shown in FIG. 35 is different from the packet configuration shown in FIG. 10 or FIG.
1 and the sending address 532 are newly added.

The detailed structure of the address section shown in FIG. 35 is shown in FIG.
6 is shown. In each of the embodiments described above, the video data has 24 bits as described above, but the command data has a 16-bit configuration.

For this reason, in the fifth embodiment, this 1
The 6-bit command data is divided into the upper 8 bits and the lower 8 bits.
The data is divided into bit parts, and the upper 8 bits are used as address data for specifying a device directly connected to the terminal unit 2000 (corresponding to the image display unit A2200 and the image display unit B2100 in the example of FIG. 34).

Then, the device whose lower 8 bits are specified by the upper 8 bits is hanging (the optional device 110 connected to the image display unit A2200 in the example of FIG. 34).
(Equivalent to 0).

The transmission control from the terminal unit to each connected device using the command communication packet will be described below with reference to the flowchart in FIG. Note that, for ease of explanation, the flow chart of FIG. 38 will be described using the case of the connection state shown in FIG. 37 as a specific example.

In FIG. 37, reference numeral 2500 denotes a two-port terminal having the same configuration as the terminal 1600 shown in FIG. 31, reference numeral 2600 denotes a display A having the same configuration as the image display A2200 in FIG. For example, a printer 2700, which is an optional device connected via the external I / F 151, is a display unit B connected to the driver circuit 150 of the display unit A2600. Also,
Reference numeral 2800 denotes a display unit C connected to the terminal unit 2500. The addresses shown in the upper right of each configuration are the addresses allocated to each configuration.

Each component connected to the terminal unit 2500 monitors reception of command data (command packet) in step S101 of FIG. When the command data is received, the process proceeds to step S102, and it is checked whether or not the upper address shown in FIG. 36 is an address assigned to itself. For example, in the case of the display unit A2600 shown in FIG. 37, it is checked whether or not the upper address is “H (01)”. If it is not a packet addressed to itself, the process returns to step S101 without performing any processing, and prepares for the next command reception. Since the packet information from the terminal unit 2500 is automatically sent to the next image display unit via its own driver 150, if the driver 150 is kept in the driving state, other image connected to itself will be displayed. Since the data is automatically transferred to the display unit, there is no need to perform any further control.

On the other hand, if the upper 8 bits are a packet addressed to itself in step S102, the flow advances to step S103 to check the address of the lower 8 bits to determine whether the packet is for itself. Display unit A2600 in FIG.
If the lower 8 bits are "00", it is determined that the packet is addressed to itself. If the lower 8 bits are not "00", it is determined that the packet is addressed to a device hanging on itself, for example, a printer 2650.

If it is determined in step S103 that the packet is not addressed to itself, the flow advances to step S104 to relay and transmit the received packet to the optional connection device. For example, it is sent from the display unit's own modem to the connection option device via the external I / F. Then, the process returns to step S101 to prepare for receiving the next command.

On the other hand, if it is determined in step S103 that a packet addressed to itself has been received, the flow advances to step S105 to check whether or not the own device is in the power-off state (display panel light-off state). If it is in the power-off state, the process proceeds to step S106, in which the address of the terminal unit is set as the destination address at the next command transmission timing addressed to the terminal unit, and the own address is set as the sending address to indicate the light-off state. Generate and send a return packet incorporating the command data. Then, the process returns to step S101.

On the other hand, if it is not deactivated in step S105, the flow advances to step S107 to analyze the received packet. Then, in the subsequent step S108, it is checked whether or not the invalid command cannot be processed by the own device. If the command is not an invalid command, the process advances to step S109 to execute a process corresponding to the analyzed command. Then, the process returns to step S101.

On the other hand, if an invalid command is received in step S108, the flow advances to step S110 to set the terminal address to the destination address at the next command transmission timing addressed to the terminal unit, and to set the own address to the sending address. Set to generate and send a return packet incorporating the "NAK" command data. And step S
Return to 101.

When a request to transmit to the terminal unit is issued from the own device, the address of the terminal unit is set to the destination address at the next command transmission timing addressed to the terminal unit, and the own address is set to the sending address. Is set and a transmission packet incorporating the transmission command data is generated and transmitted.

Alternatively, when there is a transmission request from the connection option device and there is no transmission request from itself, the terminal address is set to the destination address at the next command transmission timing addressed to the terminal unit from itself and the sending address is set. The address of the connected device is set, and a transmission packet incorporating the transmission command data is generated and transmitted.

As described above, according to the fifth embodiment, the required number of image display units can be connected to one terminal unit.

In the fifth embodiment, since the common data is received by the image display units, if the specifications of the image display units are common, the display data is directly transmitted to the required number of image display units. Can be sent.

However, if the display specifications are different in each image display unit, for example, if each image display unit or the video signal processing unit of the terminal unit is provided with a function of performing resolution conversion,
Restrictions on specifications of the image display unit to be connected are greatly eased.

For example, the terminal unit converts the input video data from the input I / F to high-resolution image information, or converts the input video data to image information of a resolution whose transmission quality is guaranteed, and transmits it to each image display unit. Then, each image display unit may control the received image information of the predetermined resolution so as to convert the received image information into a resolution suitable for the own apparatus and display the converted image information.

[Sixth Embodiment] In each of the embodiments described above, the terminal unit and the image display unit perform completely independent configurations and controls. But,
The invention is not limited to the examples described above,
For example, a configuration may be adopted in which a processing procedure necessary for processing information related to display output from the terminal unit by the image display unit can be transferred from the terminal unit to the image display unit as needed.

With such a configuration, even if the image display unit cannot provide an appropriate display only with the provided functions, or if the apparatus is improved, the feedback to the image display unit is ensured. can do. As described above, the sixth embodiment according to the present invention in which a predetermined control procedure of the image display unit can be transferred from the terminal unit,
This will be described below with reference to FIGS. 39 and 40. The configuration of the sixth embodiment is the same as that of each of the above-described embodiments except for the configuration described below, and a detailed description of such portions will be omitted.

FIG. 39 is a block diagram showing the configuration of the sixth embodiment according to the present invention, FIG. 40 is a flowchart showing the download processing of the terminal unit of the sixth embodiment, and FIG. 41 is the sixth embodiment. 9 is a flowchart illustrating a download process of the image display unit according to the embodiment.

In the sixth embodiment, compared to the configuration of the first embodiment shown in FIG.
Is provided with a program memory 260, and the image display unit 1 is provided with a program memory 160 in which a control program downloaded to the display unit CPU 101 is stored. The program memory 160 is a non-volatile memory, and the program memory 260 has the same configuration as that of FIG. 2 except for the rewritable configuration such as an EEPROM, a flash memory, and a battery-backed SRAM, so that the detailed description is omitted.

In the sixth embodiment having the above configuration, for example, following the power-on processing shown in FIGS. 8 and 9, the processing shown in FIGS. 40 and 41 is executed.

The terminal unit 2 requests the image display unit 1 to transmit a program ID command indicating the version of the program in step S150 in FIG. Then, in step S151, the program ID returned is analyzed and compared with the program ID stored in the program memory 260 of the own device. And the following step S
If the program ID of the image display unit 1 is the same version as the program ID of its own device in 152, it is determined that there is no need to download the program, and the processing shifts to the operation mode setup processing shown in FIG.

On the other hand, if it is determined in step S152 that the version is different from the program ID of the own apparatus, it is determined that the program needs to be downloaded, and step S1 is executed.
Proceeding to 53, a program download request is transmitted to the image display unit 1. Then, the response from the image display unit 1 is checked,
Check whether the download is possible. If the download cannot be performed for some reason or if the program memory 160 is not provided, a message indicating that the download is impossible is returned. , Receive hardware specifications and adjustment data. In this case, the terminal unit 2 has a control program with limited functions. It can be displayed with minimum functions.

On the other hand, if download permission is returned in step S154, the flow advances to step S155 to download an amount of the program that can be transmitted at the next transmission timing. Then, it is checked in step S156 whether the download has been completed. If it has not been completed yet, the process returns to step S155, and downloads an amount of programs that can be sent at the next transmission timing.

In this way, the program is sequentially downloaded, and when all the downloads are completed, the process shifts from step S156 to the power-on process shown in FIG.
Receives hardware specifications and adjustment data.

The flow shifts to the operation mode setup processing shown in FIG.

On the other hand, the image display unit 1 monitors command reception from the terminal unit 2 in step S161 shown in FIG. Then, when the command reception is detected, step S162
To check whether the command is a transmission request command of a program ID command. If the command is a transmission request command of a program ID command, the process proceeds to step S163, and the program ID indicating the version of the program stored in the program memory 160 of the own device is returned to the terminal unit 2.

On the other hand, in step S162, the program ID
If it is not a command transmission request command, step S
Proceeding to 164, it is determined whether or not a download request command has been received. If the download request command has not been received, a process corresponding to the received command is performed.

On the other hand, if it is determined in step S164 that a download request command has been received, the flow advances to step S165 to check whether download is possible. If the download is impossible for some reason or if the program memory 160 is not provided, it is determined that the download is not possible, and the process proceeds to step S166, where the download disable is returned to the terminal unit 2 and the power is turned on as shown in FIG. Then, the hardware specifications and adjustment data are transmitted.

On the other hand, if download is possible in step S165, the flow advances to step S167 to return a download permission. Then, in step S168, the terminal unit 2
Download the program sent from. Then, in step S169, it is determined whether or not the download has been completed. If not completed yet, step S168
Return to and download as many programs as can be sent at the next transmission timing.

In this way, the program is sequentially downloaded, and when all the downloads are completed, the process proceeds to the power-on process shown in FIG. 9 from step S169 to transmit the hardware specifications and adjustment data.

The program to be downloaded as described above can be a macro instruction group or the like of the program when the image display unit 1 performs display control. Also, it is desirable that the control program is written in C language, and the terminal unit 2 executes the control program written in C language while sequentially translating the control program.

In this case, there is an advantage that the control program can be executed without depending on the machine language of the CPU of the terminal unit 2. In addition,
It goes without saying that the control program is not limited to the C language.

As described above, according to the sixth embodiment, even if the function normally provided by the image display unit cannot be used for proper display, or if the apparatus is improved. In this way, it is possible to reliably feed back to the image display unit.

Further, the terminal unit 2 can execute a control program suitable for the characteristics of the image display unit 1. For example, in a small display, the menu display function is reduced and the remote control is mainly used. On the other hand, a large display incorporates a visual I / F such as an icon in addition to a character menu.

[Seventh Embodiment] In each of the embodiments described above, an example in which adjustment of the terminal unit and the image display unit is performed in accordance with an instruction from a user via a user I / F. explained. However, the present invention is not limited to the above example, and the image display unit may detect the surrounding environment of the own device, and may perform control such that the image display unit and the terminal unit are adjusted according to the detection result. . A seventh embodiment according to the present invention in which the surrounding environment can be detected as described above will be described below with reference to FIGS. The configuration of the seventh embodiment is the same as that of each of the above-described embodiments except for the configuration described below, and a detailed description thereof will be omitted.

FIG. 42 is a block diagram showing the configuration of the seventh embodiment according to the present invention, FIG. 43 is a diagram showing an example of the arrangement of each component in the seventh embodiment, and FIG. FIG. 45 is a flowchart showing the control of the image display unit at the time of detecting an environmental change according to the embodiment, and FIG. 45 is a flowchart showing the control of the terminal unit at the time of detecting an environmental change according to the seventh embodiment.

The seventh embodiment shown in FIG. 42 is different from the configuration of the fourth embodiment shown in FIG. 31 in that the terminal unit 1600 detects whether or not a telephone is used. The image display units 1700 and 1800 include a detection unit 271, a brightness detection unit 171 that detects the brightness around the image display unit, a noise detection unit 172 that detects the volume (noise intensity), and a surrounding color temperature. The point is that a color temperature detecting section 173 is provided. The other configuration is the same as the configuration in FIG. 31 and thus the detailed description is omitted. The image display section B
1800 also includes a detection unit similar to the image display unit A1700.

In the following description, the example shown in FIG. 42 will be described. However, it is needless to say that each of the above embodiments can be configured to include the above detectors.

For example, as shown in FIG.
00 is installed at the corner of the living room, the display unit A1700 which is a large wall-mounted monitor is installed on the wall of this living room, and the display unit B1800 which is a small monitor is installed in the bedroom. In such a case, it is expected that the installation environment is greatly different in each display unit, and it is not appropriate to make the same adjustment result in each display unit. In addition, depending on the adjustment by the user, it is not always the case that the image is viewed with the optimum image quality. Therefore, in the seventh embodiment,
A detector for the surrounding environment of each display unit and the terminal unit is provided, and adjustment suitable for the surrounding environment is performed.

First, control of the image display unit will be described with reference to FIG. FIG. 44 is a flowchart showing the control of the image display unit at the time of detecting an environmental change according to the seventh embodiment.

The following control is performed in the image display unit. That is,
The display unit CPU 101 performs a process corresponding to a case where a change of a predetermined value or more is detected in the detection result of each detector. In the following description, it is assumed that the adjustment right of each adjustment item is on the side described in the first embodiment.

First, in step S201, it is determined whether or not a change of a predetermined value or more is detected in the detection result of the brightness detector 171. If a certain or more change is detected, the process proceeds to step S202, and the detection result is notified to the terminal unit 1600. This is because the right of adjustment corresponding to a change in brightness, such as contrast adjustment, is provided by the terminal unit 1600 as described above.
Because it is on the side. Then, in step S201, the process merges with a case where a change of a predetermined value or more is not detected in the detection result of the brightness detector 171 and the process proceeds to step S203.

In the step S203, the noise detector 172
It is determined whether or not a change equal to or more than a predetermined value is detected in the detection result. If a change exceeding a certain level is detected, step S
Proceeding to 204, the detection result is notified to the terminal unit 1600.
This is because although the image display has the right to adjust the volume, it is necessary to control the volume so that it does not increase when the phone is in use, as described below. This is a transmission for detecting whether or not it is in progress. Thereafter, the volume is adjusted in accordance with the volume adjustment instruction from the terminal unit. This control is performed by normal command processing.

Here, when the terminal unit requests to transmit a command indicating whether or not the telephone is in use, and when the telephone use state is constantly notified, the volume is adjusted accordingly. It is sufficient to transmit only the result. Then, it merges with the case where the detection result of the noise detector 172 does not detect a change of a certain value or more in step S203, and proceeds to step S205.

In step S205, the color temperature detector 173
It is determined whether or not a change equal to or greater than a predetermined value is detected in the detection result. If a change exceeding a certain level is detected, step S
Proceeding to 206, for example, the panel driving unit 106 of the image display unit
Is adjusted to adjust the color humidity to be higher for light such as a fluorescent lamp, and to lower the color temperature for incandescent lamps.

In step S207, the adjustment result is notified to the terminal unit 1600, and the process returns to step S201.

Next, control of the terminal unit will be described with reference to FIG. FIG. 45 is a flowchart showing the control of the terminal unit at the time of detecting an environmental change according to the seventh embodiment. The terminal unit performs the following control.

The terminal unit 1600 monitors reception of command data from the image display unit in step S211 as shown in FIG. If the command data has not been received, the process proceeds to step S212, in which the output of the telephone use detection unit 271 of the terminal unit 1600 is monitored to determine whether the use state of the telephone has changed. Although only one telephone use detection unit 271 is shown in FIG. 42, when a plurality of telephones are provided, the use state of each telephone can be switched.
This can be configured with a known in-phone detection function such as detecting a DC loop formation state of the telephone and detecting whether or not the telephone is in use. If there is no change in the telephone use state, the process returns to step S211.

On the other hand, if a command has been received in step S211, the flow advances to step S213 to check whether or not the command is a command for notifying an environmental change. If the command is not a notification of an environmental change, a corresponding process is performed.

If it is determined in step S213 that the command is a notification of an environmental change, the flow advances to step S214 to check whether or not brightness is detected. If the brightness detection result has changed, the process advances to step S215 to perform adjustment corresponding to the change in brightness, such as contrast control in which the terminal unit 1600 has the right to adjust.

At step S216, the adjustment result is held, and the adjustment result is reported to the corresponding image display unit. At step S214, the case where there is no change in brightness is merged, and the process proceeds to step S217.

In step S217, it is checked whether or not the detected noise level is a noise level. If the noise detection result has changed, it merges with the case where there is a change in the telephone use state in step S212, and proceeds to step S218 to determine whether a telephone in the same room as the image display unit that has now notified the environmental change is in use. Check whether or not. If not in use, step S21
Then, the flow advances to step S9 to instruct the image display unit to adjust the volume according to the detected noise level. If the air conditioner is in use, the flow advances to step S220 to instruct the image display unit to lower the volume.

Next, proceeding to step S221, if the color temperature adjustment result has been sent, proceeding to step S222,
The process returns to step S211 while holding the adjustment result.

[Eighth Embodiment] In the embodiment described above, an example in which the terminal section and the image display section are directly connected by the interface cable has been described. However, the present invention is not limited to the above-described example, and it goes without saying that the present invention includes wireless communication of some interface cable portions.

An eighth embodiment according to the present invention will be described below with reference to FIG. 46, in which a part of the interface cable is configured to communicate wirelessly. The eighth embodiment is directed to an example in which optical communication is performed in a wireless section using light, for example, infrared light. However, the present invention is not limited to the above example. For example, communication may be performed using ultrasonic waves, or radio waves may be used, and various methods can be adopted. Since the configuration of the eighth embodiment is the same as that of each of the above-described embodiments except for the configuration described below, detailed description of such portions will be omitted.

In the eighth embodiment, as shown in FIG. 46, the image display section is provided with an optical communication section instead of the interface connector with the terminal section, and the optical communication section is provided with a command to the terminal section. It consists of a light-emitting unit for transmitting information and a light-receiving unit for receiving information from the terminal unit. A change in the amount of light received from the light-receiving unit is detected as an electrical signal, which is amplified by an amplifier and output to the display modem. The light emission of the light emitting unit may be controlled via the driver circuit according to the modulation signal from the display unit modem.

On the other hand, in the terminal section, an optical communication section substantially similar to the image display section is provided at the end of the interface cable, and the optical communication section is connected to the light emitting section for transmitting information to the image display section and the image display section. A light receiving section for receiving command information, detecting a change in the amount of light received from the light receiving section as an electric signal, amplifying this by an amplifier, outputting the amplified signal to a terminal modem, and driving a driver circuit according to a modulation signal from the terminal modem. Light emission of the light emitting unit may be controlled via the light emitting unit. Known methods can be applied to these configurations and controls.

It is desirable that the optical communication section of the image display section is disposed, for example, on the upper surface of the housing of the image display section. If it can be arranged at any position. For example, it may be on the lower surface of the image display unit housing, on the back surface, or on the front surface.

When the image display unit is a wall-mounted thin monitor, it is disposed on the top of the housing as shown in FIG.
If the optical communication section of the terminal section is located opposite to the optical communication section arrangement position of the image display section near the ceiling, input and output to and from the image display section can be suppressed to only power cables.

By arranging the optical communication section on the terminal side near the ceiling in this way, the existence of both optical communication sections hardly impairs the appearance, and the trouble of cable wiring is released. Further, even if the installation location is changed, it is sufficient to simply change the position of the optical communication unit on the ceiling side.

Further, by disposing the optical communication unit on the terminal side above the position where the image display unit is to be installed in advance, it is possible to easily cope with a change in the arrangement position of the image display unit. . Also, on the terminal side, when light from the optical communication unit of the image display unit is detected, it can be determined that the image display unit at the detection position has become movable, and if only the optical communication unit at the position is energized, The deterioration of the optical communication section can be prevented.

[Ninth Embodiment] In the above-described embodiment, an example has been described in which one image display unit displays one screen. However, the present invention is not limited to the above example, and a plurality of image display units may be arranged close to each other, and control may be performed so that one image can be displayed on the plurality of image display units as a whole. . A ninth embodiment according to the present invention in which a plurality of image display units are controlled so as to be able to display one image as described above will be described with reference to FIG. Since the configuration of the ninth embodiment is the same as that of the above-described embodiments except for the configuration described below,
A detailed description of such portions is omitted.

As an example in which one image is controlled to be able to be displayed on a plurality of image display units as a whole, reference numeral 47 denotes one display screen constituted by four image display units. In the case of this configuration, the configuration of each image display unit can be, for example, the image display unit configuration shown in FIG. 34 of the fourth embodiment described above.

In the terminal section, address control may be performed such that only (１ ／) display data of each display screen shown in FIG. 47 of the display screen is received as video data for each image display section.

By controlling in this way, a large screen can be displayed.

[Tenth Embodiment] In the embodiment described above, when information is communicated between the terminal unit and the image display unit, the communication timing is determined in advance for each data, and the communication is performed. A configuration has been described in which the type of information that can be specified can be specified at the timing at which the information is communicated. However, the present invention is not limited to the above example, and the information may include information type identification data without limiting the communication timing of the information. The first embodiment according to the present invention thus configured
Embodiment 0 will be described with reference to FIG. In addition,
The configuration of the tenth embodiment is the same as that of each of the above embodiments except for the configuration described below, and a detailed description of such portions will be omitted.

In the tenth embodiment, the source of the information is header data indicating the nature and amount of data to be communicated at the beginning of each piece of communication information so that the type of communication information can be determined at the communication timing. And send it.

For example, in the example of FIG. 48, header data is added to the head of each piece of information shown in black, and in the battle of video data, the data to be transmitted is video data.
A header indicating that the data capacity is 2 dots (pixels) is added. If there are many audios, header data indicating that they are L channel audio data and R channel audio data, respectively, are added.

By performing such control, useless idle time can be prevented, and much information can be communicated. For example, necessary information can be efficiently transferred when the image display unit has a frame memory or the like, or when an optional device is connected and a large amount of data is transferred to the optional device.

[Other Embodiments] Even if the present invention is applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), the present invention includes only one device. The present invention may be applied to an apparatus (for example, a copying machine, a facsimile machine, etc.).

An object of the present invention is to supply a storage medium (or a recording medium) in which a program code of software for realizing the functions of the above-described embodiments is recorded to a system or an apparatus, and to provide a computer (or a computer) of the system or the apparatus. Or CPU and MPU) read and execute the program code stored in the storage medium,
Needless to say, this is achieved. In this case, the program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.
In addition, by the computer executing the readout program code, not only the functions of the above-described embodiments are realized, but also based on the instructions of the program code,
The operating system (OS) running on the computer performs part or all of the actual processing,
It goes without saying that a case where the function of the above-described embodiment is realized by the processing is also included.

Further, after the program code read from the storage medium is written in the memory provided in the function expansion card inserted into the computer or the function expansion unit connected to the computer, the program code is read based on the instruction of the program code. , The CPU provided in the function expansion card or the function expansion unit performs a part or all of the actual processing,
It goes without saying that a case where the function of the above-described embodiment is realized by the processing is also included.

When the present invention is applied to the storage medium, the storage medium includes the storage medium described above (shown in FIGS. 2, 3, and 4).
The program code corresponding to the flowchart is stored.

[0301]

As described above, according to the present invention, since the video signal can be transmitted in accordance with the characteristics of the image display unit connected at the supply source, the characteristics of the connected image display unit change. Can also be easily adapted.

Further, at the start of the operation, the adjustment state of the image display unit can be surely recognized by the supply source, and the trouble caused by the deviation of the adjustment result can be eliminated before the operation.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a basic configuration of an embodiment according to the present invention.

FIG. 2 is a block diagram illustrating a detailed configuration of an image display unit and a terminal unit according to the embodiment.

FIG. 3 is a diagram illustrating a detailed configuration of an interface circuit portion between a terminal unit and an image display unit and an input / output unit of a modem according to the embodiment;

FIG. 4 is a diagram illustrating a detailed configuration example of a portion that receives image information having different specifications of an input I / F and outputs the image information to a video signal processing unit according to the embodiment;

FIG. 5 shows an input I / F shown in FIG. 4 according to the embodiment;
FIG. 4 is a diagram showing an example of output timing of an input I / F when an image signal of the NTSC specification is input in FIG.

FIG. 6 shows an input I / F shown in FIG. 4 according to the embodiment;
FIG. 3 is a diagram showing an example of output timing of an input I / F when an image signal of HDTV specification is input in FIG.

FIG. 7 is a diagram showing an example of an operation check control procedure with the image display unit after the power to the terminal unit is turned on in the present embodiment.

FIG. 8 is a flowchart showing control when the power of the terminal unit of the present embodiment is turned on.

FIG. 9 is a flowchart showing control at the time of power-on of the image display unit according to the embodiment.

FIG. 10 is a diagram illustrating an example of a communication packet configuration used for communication control when the power is turned on according to the present embodiment.

FIG. 11 is a diagram showing another configuration example of a communication packet used for communication control when the power is turned on in the present embodiment.

FIG. 12 is a diagram illustrating a data configuration in a unit cycle according to the present embodiment.

FIG. 13 is a diagram illustrating an example of a packet configuration when transmitting and receiving command data according to the present embodiment.

FIG. 14 is a diagram showing a format example of adjustment data in the embodiment.

FIG. 15 is a flowchart showing a setup process of an operation mode of the terminal unit in the embodiment.

FIG. 16 is a flowchart showing a setup process of an operation mode of the image display unit in the embodiment.

FIG. 17 is a diagram illustrating an example of data communication control timing within a vertical synchronization signal generation cycle between the image display unit and the terminal unit according to the present embodiment.

FIG. 18 is a diagram illustrating an example of data communication control timing within a horizontal synchronization signal generation cycle between the image display unit and the terminal unit according to the present embodiment.

FIG. 19 is a diagram for explaining data communication timing between the image display unit and the terminal unit when the display panel of this embodiment is 852 dots × 480 dots.

FIG. 20 is a diagram for explaining data communication timing between the image display unit and the terminal unit when the display panel of this embodiment is 640 dots × 480 dots.

FIG. 21 is a diagram for explaining data communication timing between the image display unit and the terminal unit when the display panel of this embodiment is 1365 dots × 768 dots.

FIG. 22 is a horizontal transfer clock (CLK) when the display panel of this embodiment is 1365 dots × 768 dots;
FIG. 8 is a diagram for explaining data communication timing between the image display unit and the terminal unit when the frequency of the terminal is changed.

FIG. 23 shows an example in which audio data according to the present embodiment is VSY.
FIG. 5 is a diagram illustrating an example of communication timing between a terminal unit and an image display unit when collectively communicating at each NC timing.

FIG. 24 shows the command data of this embodiment as HSYN.
FIG. 7 is a diagram illustrating an example of communication timing between a terminal unit and an image display unit when communication is performed by dividing at each C timing.

FIG. 25 is a diagram showing an example of communication timing between a terminal unit and an image display unit when command data according to the present embodiment is controlled to be communicable during all periods except a video data valid period and an audio data communication period. is there.

FIG. 26 is a diagram for describing an example of a basic system configuration according to a second embodiment of the present invention.

FIG. 27 is a diagram for explaining another configuration example of the basic system according to the second embodiment of the present invention.

FIG. 28 is a block diagram showing a detailed configuration of the second embodiment.

FIG. 29 is a block diagram showing a configuration of a third exemplary embodiment according to the present invention.

FIG. 30 is a diagram for explaining information communication timing according to the third embodiment.

FIG. 31 is a block diagram showing a configuration of a fourth exemplary embodiment according to the present invention.

FIG. 32 is a timing chart for explaining communication control in a VSYNC cycle between a terminal unit and an image display unit according to the fourth embodiment.

FIG. 33 is a timing chart for explaining communication control in a HSYNC cycle between a terminal unit and an image display unit according to the fourth embodiment;

FIG. 34 is a block diagram showing a configuration of a fifth exemplary embodiment according to the present invention.

FIG. 35 is a diagram illustrating a packet configuration used in the fifth embodiment.

FIG. 36 is a diagram for describing a detailed configuration of an address command shown in FIG. 33;

FIG. 37 is a diagram showing a state in which a plurality of image display units according to the fifth embodiment are connected.

FIG. 38 is a flowchart for explaining command data reception processing of the image display unit according to the fifth embodiment.

FIG. 39 is a block diagram showing a configuration of a sixth exemplary embodiment according to the present invention.

FIG. 40 is a flowchart showing a download process of the terminal unit according to the sixth embodiment.

FIG. 41 is a flowchart showing download processing of the image display unit according to the sixth embodiment.

FIG. 42 is a block diagram showing a configuration of a seventh exemplary embodiment according to the present invention.

FIG. 43 is a diagram illustrating an arrangement example of each configuration according to the seventh embodiment;

FIG. 44 is a flowchart illustrating control performed when an image display unit detects an environmental change according to the seventh embodiment.

FIG. 45 is a flowchart showing control performed when an environmental change is detected in the terminal unit according to the seventh embodiment.

FIG. 46 is a diagram for explaining an example in which some interface cable portions of the eighth embodiment according to the present invention are configured to communicate wirelessly.

FIG. 47 is a diagram illustrating a configuration example of a ninth embodiment according to the present invention.

FIG. 48 is a timing chart for explaining communication control in a HSYNC cycle between a terminal unit and an image display unit according to the tenth embodiment of the present invention.

FIG. 49 is a diagram illustrating a configuration in a case where various images are to be displayed on a conventional television receiver that receives and displays television broadcasts.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

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 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoto Abe 3-30-2 Shimomaruko, Ota-ku, Tokyo In-house Canon Inc. (72) Inventor Sogi 3-30-2 Shimomaruko, Ota-ku, Tokyo Kia Non-stock company In-house F term (reference) 5B069 AA20 BB16 BB20 KA03 LA20 5C025 AA29 BA25 CA06 DA10 5C082 AA02 BA41 BB01 CA81 CB01 DA87 MM05 MM09

Claims (20)

[Claims] 1. An image display control system comprising: a supply source for transmitting a signal including at least a video signal; and an image display unit for receiving a signal from the supply source and displaying a corresponding image. A source, a characteristic acquisition unit that acquires characteristic information of the image display unit when power is turned on, and a determination unit that determines a signal communication specification with the image display unit from characteristic data acquired by the characteristic acquisition unit. Communication means for performing communication of a signal including the video signal with the communication specification determined by the determination means, wherein the image display unit transmits specific information for specifying characteristics of the own device to the supply source. An image display control system comprising: means for communicating a signal including the video signal determined by the determining means of the supply source. 2. The characteristic acquiring unit includes: a characteristic information requesting unit that transmits a request for transmitting characteristic information to the image display unit; a detecting unit that detects a connection request including characteristic information from the image display unit; Characteristic information detecting means for detecting characteristic information returned from an image display unit, wherein the image display unit transmits a connection request including specific information of the own device to the supply source; 2. The image display control system according to claim 1, further comprising: characteristic information transmitting means for transmitting characteristic information of the apparatus in response to a characteristic information transmission request from a source. 3. The characteristic information requesting means, if the characteristic information is not returned from the image display unit even if a characteristic information transmission request is transmitted a predetermined number of times after the power source is turned on, 3. The image display control system according to claim 2, wherein the transmission of the transmission request is stopped. And a connection request transmitting unit that transmits a connection request for a predetermined number of times after the power is turned on to the image display unit but does not return a characteristic information transmission request from the supply source. 4. The image display control system according to claim 2, wherein detection of a request for transmission of characteristic information is monitored. 5. The request for transmitting characteristic information by the characteristic information requesting unit includes a request for transmitting the specification information of the image display unit, and the image display unit responds to the request for transmitting the specification information, The image display control system according to claim 2, wherein the specification information is returned. 6. The transmission request for characteristic information by the characteristic information requesting unit includes a transmission request for adjustment information of the image display unit, and the image display unit responds to the request for transmission of adjustment information and transmits the adjustment information of its own device. The image display control system according to claim 2, wherein the adjustment information is returned. 7. The determining means specifies a display screen size of an image display unit from the characteristic information, determines a video signal amount to be transmitted corresponding to the specified display screen size, and determines a signal communication specification. Claims 1 to 6 characterized in that:
The image display control system according to any one of the above. 8. The signal communication specification determined by the determining means includes a vertical synchronization cycle and a horizontal synchronization cycle for transmitting a video signal, and a video signal transmission clock cycle. An image display control system according to any one of the above. 9. The characteristic data of the image display unit includes: a number of pixels and a pixel array of a display device included in the image display unit; a light emission characteristic of the display device included in the image display unit; and a gradation characteristic of the image display unit. (Number of gradations, gamma characteristics of the display device), type of the image display unit (screen size, aspect ratio, type of device), specifications of a sound reproduction system included in the image display unit, display of the image display unit 9. The image display control system according to claim 1, comprising at least one of the following: a frame frequency. 10. An image display system control method in an image display control system, comprising: a source for transmitting a signal including at least a video signal; and an image display unit for receiving a signal from the source and displaying a corresponding image. Wherein the supply source acquires a characteristic information of the image display unit when power is turned on, and a signal communication specification with the image display unit from the characteristic data acquired by the characteristic acquisition step. A determining step of determining, and a communication step of performing communication of a signal including the video signal with the communication specification determined in the determining step, wherein the image display unit supplies identification information for identifying characteristics of the apparatus to the supply source. An image table comprising: a specific information transmitting step of transmitting the information to the display unit; and a display unit communication step of performing communication of a signal including the video signal determined in the determining step of the supply source. System control method. 11. The characteristic acquiring step, wherein: a characteristic information requesting step of transmitting a characteristic information transmission request to the image display unit; a detection step of detecting a connection request including characteristic information from the image display unit; A characteristic information detecting step of detecting characteristic information returned from the image display unit, wherein the image display unit transmits a connection request including the specific information of the own device to the supply source; 11. The method according to claim 10, further comprising: transmitting characteristic information of the apparatus in response to a request for transmitting characteristic information from a source. 12. The characteristic information requesting step, wherein the characteristic information is not returned from the image display unit even if a characteristic information transmission request is transmitted a predetermined number of times after the power source is turned on. 12. The method according to claim 11, wherein the transmission of the transmission request is stopped. 13. The connection request transmitting step, wherein the transmission of the characteristic information is not returned from the supply source even if the connection request is transmitted a predetermined number of times after the image display unit is turned on. 13. The image display system control method according to claim 11, wherein a detection of a request for transmission of characteristic information is monitored. 14. The request for transmission of characteristic information in the characteristic information requesting step includes a request for transmission of specification information of the image display unit, and the image display unit responds to the request for transmission of specification information of its own device. 14. The method according to claim 11, wherein the specification information is returned. 15. The request for transmitting characteristic information in the characteristic information requesting step includes a request for transmitting adjustment information of the image display unit. 15. The image display system control method according to claim 11, wherein adjustment information is returned. 16. The determining step includes determining a display screen size of an image display unit from the characteristic information, determining a video signal amount to be transmitted corresponding to the specified display screen size, and determining a signal communication specification. The image display system control method according to any one of claims 10 to 15, wherein: 17. The signal communication specification determined by the determining step includes a vertical synchronization cycle and a horizontal synchronization cycle for transmitting a video signal, and a video signal transmission clock cycle. An image display system control method according to any one of the above. 18. The characteristic data of the image display unit includes: the number of pixels and the pixel arrangement of a display device included in the image display unit; a light emission characteristic of the display device included in the image display unit; and a gradation characteristic of the image display unit. (Number of gradations, gamma characteristics of the display device), type of the image display unit (screen size, aspect ratio, type of device), specifications of a sound reproduction system included in the image display unit, display of the image display unit 18. The image display system control method according to claim 10, further comprising at least one of the following: a frame frequency. 19. A computer program sequence for realizing the functions according to claim 1. Description: 20. A computer-readable recording medium storing a computer program for realizing the functions according to claim 1. Description: