JP4765948B2 - Television and electrical and electronic equipment - Google Patents

Description

  The present invention relates to a television and an electric / electronic device that output status information of each part of the device to a terminal to which the external device can be connected, and that the external device connected to the terminal can acquire the status information.

  Currently, many electrical and electronic devices including television receivers are equipped with a maintenance port capable of serial communication with a control unit (such as a microcomputer). The microcomputer stores a control program for controlling the device, and the maintenance device is connected to the maintenance port to correct or update the malfunction of the control program. In addition, the microcomputer obtains debugging information such as the power-related status from each part of the device, the response information from each IC, and which function the program being executed by the microcomputer is in, and the obtained debugging information is stored in the maintenance port. Is output.

Patent Documents 1 to 3 describe that various types of information inside the device can be output to the terminal and the various types of information can be acquired by connecting an external device. For example, Patent Document 1 describes a video device that encodes adjustment values of various parameters used during operation of the apparatus main body into a video signal and outputs the video signal to an external output terminal. Patent Documents 2 and 3 describe the use of an audio output terminal for outputting an audio signal to a speaker, or use as a maintenance port.
JP 2003-23647 A JP 2004-340919 A JP 2005-197858 A

  Conventionally, the microcomputer is configured to output all the debug information. However, if all the debug information is output at all times, the load on the control unit (microcomputer) that executes the process of outputting the debug information increases, which may interfere with other processes. If all the debug information is output, the operator who performs maintenance and debugging needs to find out the necessary information, and it is difficult to accurately acquire the abnormal information, and the defect detection efficiency is deteriorated. Therefore, it has been required to output only the information desired by the operator from the debug information.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a television and an electric / electronic device that can select and specify information output to a maintenance port.

In order to solve the above problems, in the present invention, status information acquisition means for acquiring a plurality of status information by communicating with each unit constituting the device, and status information for outputting the status information to a connection terminal for connecting an external device In an electrical and electronic apparatus comprising: output means; output information selection means for selecting whether to output the status information for the connection terminal by level or for each purpose; and which of the status information to the connection terminal First selection means for selecting whether to output by level, second selection means for selecting which of the status information is output to the connection terminal by purpose,
And when the output by the output information selection means has selected an output for each level, the status information output means has status information that is equal to or higher than the level selected by the first selection means. When the output for each purpose is selected by the output information selection means, the status information that matches the purpose selected by the second selection means is obtained. The output is made to the connection terminal . The output state information is acquired by an external maintenance device and displayed on the screen (display panel) of the maintenance device, so that the maintenance person or developer can grasp the state of the electric / electronic device.

  Each unit refers to a power supply that converts a power supply voltage supplied from the outside such as a commercial power supply into a predetermined voltage and supplies various power supply voltages, a control unit that controls electric and electronic devices, and various signals according to instructions from the control unit An IC or the like that executes processing. The communication may be bidirectional communication or unidirectional communication. For example, a voltage signal whose voltage value is reduced to a predetermined ratio by a circuit can be included.

  Status information includes voltage value, response content, presence / absence of response, status output by software, etc. For example, response to command issued to IC (or presence / absence of response), corresponding to voltage at a predetermined part of circuit Voltage information to be performed, the current processing step of the program being executed in the control unit, the function name being executed, and the like. The plurality of state information is at least two pieces of information, and information to be output and information not to be output exist at the same time. That is, there is a situation where only necessary information is output and unnecessary information is not output.

  And the said output information selection means is good also as a structure which classify | categorizes the said status information according to the objective in the maintenance and development of an electric and electronic equipment, and selects it for every classification. That is, as a method of separating necessary information from unnecessary information, information that the maintenance person or developer wants to acquire collectively can be selected for each purpose in maintenance and development. Therefore, only the information that matches the necessary purpose is acquired in the maintenance device, and the maintenance person and the developer can grasp only the necessary information. As a result, the defect detection efficiency increases, and the efficiency of defect analysis in service, repair, QC (Quality Control) inspection, etc. is improved. In addition, since the amount of state information output to the outside is reduced, the processing for outputting the state information to the outside is lightened, and the stability of the system of the electrical and electronic equipment is improved.

  Further, the output information selection means may be configured to classify the state information according to the level in the maintenance and development of electric and electronic equipment and to select for each classification. That is, as a method of separating necessary information from unnecessary information, it is possible to select whether to output according to the level of state information (severity level, urgency of response, state risk level). Therefore, the maintenance equipment acquires status information according to the level such as a state where response is urgent, a state where response is not so urgent but should be resolved, a state where it is not necessary to resolve it, and it is better to respond. As a result, the maintenance personnel and developers can grasp the status information for each level. As a result, the defect detection efficiency increases, and the efficiency of defect analysis in service, repair, QC (Quality Control) inspection, etc. is improved. In addition, since the amount of state information output to the outside is reduced, the processing for outputting the state information to the outside is lightened, and the stability of the system of the electrical and electronic equipment is improved.

  Furthermore, as a more specific configuration example, a tuner that receives a required signal from an input television broadcast signal, converts it to an intermediate frequency signal and outputs it, and extracts a video signal from the intermediate frequency signal input from the tuner A first video processing IC that generates and outputs a digital video signal expressed in RGB, and a digital video signal expressed in RGB from a video signal input from an analog video signal input terminal. A second video processing IC; a third video processing IC that generates and outputs a digital video signal expressed in RGB from a video signal input from a digital video signal input terminal; and the first video processing IC; Output the digital video signal output from either the second video processing IC or the third video processing IC by performing pixel number conversion, image quality adjustment, and output processing A fourth video processing IC, a display panel for displaying a video based on a digital video signal output from the fourth video processing IC on a screen, a drive voltage generation circuit for supplying a drive voltage to the display panel, A microcomputer that includes a CPU, ROM, and RAM and executes a control program stored in the ROM by the CPU while using the RAM as a work area, and a predetermined commercial power source is input to the primary side from the outside, and the input voltage is The voltage is converted to a desired voltage by a transformer and output to the secondary side. The tuner, the first video processing IC, the second video processing IC, the third video processing IC, and the fourth video processing are output. An IC, the drive voltage generation circuit, a power supply circuit that supplies a power supply voltage to the microcomputer, and a maintenance port that is connected to the microcomputer so that serial communication is possible and can connect an external device. And an operation input device that receives a user's operation input, and the microcomputer includes information indicating an input voltage and an output voltage of the power supply circuit, information indicating an output voltage of the drive voltage generation circuit, and Response information of the first video processing IC, response information of the second video processing IC, response information of the third video processing IC, response information of the fourth video processing IC, and the microcomputer In a television that obtains information as to which function is being processed as status information and outputs the status information to the maintenance port, the microcomputer includes a register, and the microcomputer includes any of the status information described above. A screen for selecting whether to output to the maintenance port by level or purpose is displayed, and the screen is output according to the level or purpose selected and input by the operation input device. The status information is set in the register, the microcomputer acquires the setting of the register, and when the setting of the register is set to select the status information to be output depending on the level, the level of the acquired status information is determined and determined. If only the status information judged to be above the level is output to the maintenance port, and the setting of the register is to select the status information to be output according to the purpose, it is set by judging the type of status information acquired Only the state information that matches the purpose is output to the maintenance port.

As described above, according to the present invention, it is possible for a maintenance person or a developer to acquire abnormality information of a device more accurately, and the defect content detection efficiency is improved. As a result, the efficiency of failure analysis in service, repair, QC inspection, etc. is improved. Further, by limiting the state information to be output, the stability of the system is improved . In addition, it becomes possible for the maintenance person or developer to acquire only the state information suitable for the purpose, which improves convenience and further improves the efficiency of detecting defect contents. In addition , it is possible for a maintenance person or a developer to acquire status information for each level, which improves convenience and further improves defect content detection efficiency.
Furthermore it goes without saying that the same effects and 請 Motomeko 2 Te yo Ri specific configuration smells like claim 1.

Hereinafter, embodiments of the present invention will be described in the following order.
(1) Configuration of television receiver:
(2) Status information selection processing:
(3) Status information acquisition processing:
(4) Summary:

(1) Configuration of television receiver:
The configuration of a liquid crystal television 100 as an electric / electronic device according to an embodiment of the present invention will be described below with reference to the drawings with reference to FIGS. FIG. 1 is a block diagram showing a schematic electrical configuration of a liquid crystal television.

  In FIG. 1, a liquid crystal television 100 includes a tuner 10, video processing ICs 12, 14, 16, 18, a liquid crystal panel 20, a backlight 22, an inverter circuit 23, a power circuit 24, a microcomputer 26, an operation panel 28, an infrared I / F. (Interface) 30, maintenance port (hereinafter abbreviated as port) 32, and IIC bus (Inter-IC bus) 34. The IIC bus 34 connects the tuner 10, the video processing ICs 12, 14, 16, 18 and the microcomputer 26 so that they can communicate with each other.

  The operation voltage from the power supply circuit 24 is supplied to each part of the liquid crystal television 100 (tuner 10, video processing ICs 12, 14, 16, 18, liquid crystal panel 20, inverter circuit 23, microcomputer 26, operation panel 28, infrared I / F 30 and the like). Is supplied. In the power supply circuit 24, a predetermined commercial power supply (for example, AC 100V) is input to the primary side, and this input voltage is converted into a desired voltage and output to the secondary side. This conversion from primary to secondary is performed by a transformer. The voltage on the secondary side is converted into various voltages by a transformer, a regulator, an oscillation circuit, etc., and a voltage conforming to the specifications of each part is supplied to each part as an operating voltage.

  The tuner 10 can be connected to an antenna 10a as an input source of a television broadcast signal. The tuner 10 receives a signal with a desired frequency corresponding to the television broadcast band under the control of the microcomputer 26 and receives only a required signal from the received signal. Is selected, amplified at high frequency, converted to an intermediate frequency signal and output.

  The video processing IC 12 (first video processing IC) extracts a video signal and an audio signal from the intermediate frequency signal input from the tuner 10 and represents a digital video represented by R (red) G (green) B (blue). It converts into a signal and a digital audio signal, outputs the converted digital video signal to the video processing IC 18, and outputs the digital audio signal to an audio processing IC (not shown).

  The video processing IC 14 (second video processing IC) is connected to an analog video signal input terminal 14a such as a composite terminal or a component terminal, and a video signal can be input from the analog video signal input terminal 14a. The video processing IC 14 generates a digital video signal expressed in RGB from the input video signal and outputs the digital video signal to the video processing IC 18.

  The video processing IC 16 (third video processing IC) is connected to a digital video signal input terminal 16a such as an HDMI (registered trademark) terminal, and a digital video signal is input from the digital video signal input terminal 16a. The video processing IC 16 generates a digital video signal expressed in RGB from the input digital video signal and outputs the digital video signal to the video processing IC 18 (fourth video processing IC).

  The video processing ICs 12, 14, and 16 output digital video signals from any one of the video processing ICs under the control of the microcomputer 26. As a result, an image based on the video signal input from any of the antenna 10a, the analog video signal input terminal 14a, and the digital video signal input terminal 16a is displayed on the screen of the liquid crystal television 100. Of course, if the number of terminals for inputting video signals increases, video processing ICs may be added corresponding to the number of terminals.

  The video processing IC 18 is supplied with a digital video signal from any one of the video processing ICs 12, 14, 16. The video processing IC 18 includes a pixel number conversion circuit, an image quality adjustment circuit, and an output processing circuit. The video processing IC 18 performs predetermined signal processing on the input video signal and outputs it to the liquid crystal panel 20. When a video signal is input, the pixel number conversion circuit generates an RGB signal for one screen displayed on the liquid crystal panel while performing a scaling process on the video signal. The image quality adjustment circuit performs various adjustments such as brightness, contrast, black balance, white balance, and sharpness on the RGB signal that has been scaled by the pixel number conversion circuit. The output processing circuit performs gamma correction, dither processing, etc. on the RGB signal whose image quality has been adjusted, adds a background signal, an OSD signal, a blanking signal, etc., and outputs it to the liquid crystal panel 20 to output an image. Display.

  The liquid crystal panel 20 (display panel) includes a panel body and a drive circuit that drives the panel body. The drive circuit generates a drive signal based on the video signal input from the video processing IC 18, and the drive signal Each pixel of the panel body is driven. Of course, the display device for displaying an image is not limited to a liquid crystal panel, and a plasma display panel (PDP), a CRT, or the like can also be employed. When a PDP is used as a display, a circuit that generates an address voltage, a scan voltage, an erase voltage, a sustain voltage, or the like corresponds to a drive voltage generation circuit described later. When a CRT is used, a vertical drive circuit generates a drive voltage generation circuit. A deflection circuit, a horizontal deflection circuit, a high voltage circuit, and a deflection coil are applicable.

  The remote controller 150 has a plurality of keys for accepting operations and a remote control transmission circuit for transmitting a remote control signal to the infrared I / F 30 and has a predetermined format in which the remote control signals corresponding to the operations of the plurality of keys are expressed in pulses. Send it out. Then, the infrared I / F 30 receives the remote control signal at the infrared light receiving unit and inputs it to the microcomputer 26, and the microcomputer 26 receives the remote control signal and executes a corresponding control process.

  The operation panel 28 includes a plurality of keys for accepting operations. The operation signal corresponding to the operation of the plurality of keys is input to the microcomputer 26, and the microcomputer 26 executes control processing corresponding to the input operation signal.

  For example, when the remote controller 150 or the operation panel 28 is operated to receive a desired channel, the microcomputer 26 receives a signal corresponding to the operation and sends frequency data to the tuner 10 so as to receive the corresponding channel. The combination of the remote controller 150 and the infrared I / F 30 and the operation panel 28 constitute an operation input device, and the microcomputer 26 that receives a selection input from the operation input device constitutes an operation input receiving means.

  The inverter circuit 23 (drive voltage generation circuit) is supplied with a DC voltage from the power supply circuit 24. The supplied DC voltage is converted into a high-voltage, high-frequency AC voltage by a separately excited or self-excited oscillation circuit, and this AC voltage (drive voltage) is supplied to the backlight 22. The backlight 22 has a plurality of fluorescent tubes as discharge lamps and serves as a light source that emits light by being supplied with an AC voltage and irradiates the liquid crystal panel 20 from the back. Of course, an LED may be adopted as the backlight 22 so that a DC voltage is supplied from the inverter circuit 23.

  The microcomputer 26 includes a CPU 26a, a ROM 26b, a RAM 26c, and a register 26d, and executes various programs stored in the ROM 26b by the CPU 26a while using the RAM 26c as a work area, thereby controlling the entire liquid crystal television 100. The microcomputer 26 communicates with the tuner 10 and the video processing ICs 12, 14, 16, and 18 through the IIC bus 34 to obtain various responses (response information). The microcomputer 26 includes a plurality of I / O ports, and receives inputs from the remote controller 150, the operation panel 28, the inverter circuit 23, and the power supply circuit 24 through these I / O ports, and the inverter circuit 23. And a control signal is output to the power supply circuit 24.

  Further, the microcomputer 26 outputs a control signal to the inverter circuit 23 and the power supply circuit 24 and acquires the voltage of the voltage input line and the voltage output line by dropping them at a predetermined rate (voltage status). Further, the microcomputer 26 can output information (microcomputer processing information) indicating which step of the process is being executed and which function is being executed in the program executed by itself. In the present embodiment, the response information, the voltage status, and the processing information of the microcomputer are combined into state information. The microcomputer 26 that acquires the status information constitutes status information acquisition means.

  The register 26d stores a set value indicating which state information is to be output. The microcomputer 26 determines whether or not to output the state information in accordance with this set value, and outputs only the state information set to be output. The data is output to the port 32.

  For example, a D-sub 9-pin connector can be used as a terminal (connection terminal) of the port 32, and it is connected to the microcomputer 26 by a UART (Universal Asynchronous Receiver / Transmitter) to enable serial communication. The status information is output from the microcomputer 26 to the port 32. By connecting a maintenance device such as the PC 200 to the port 32, the PC 200 can acquire the status information. The PC 200 performs a predetermined process on the acquired status information and displays it on the screen so that the user of the PC 200 can visually recognize the status information by viewing the screen. This status information is used for maintenance of the liquid crystal television 100 and debugging during development.

  In the case of performing maintenance, the internal information of the liquid crystal television 100 is grasped by looking at the state information displayed on the screen of the PC 200, and the problem is grasped. For example, when the processing executed by the microcomputer 26 is stagnant by a specific function or the output voltage is abnormally changed, the control program stored in the ROM 26b of the microcomputer 26 is debugged and the port 32 is started. The ROM 26b is rewritten to update the control program. When there is no response from the video processing IC, a signal for resetting the video processing IC is input to the port 32, or the microcomputer 26 is caused to output a reset signal for the video processing IC.

  In the development stage, the developer grasps the problem from these state information and uses it for circuit design and program development. For example, when the output voltage changes abnormally, adjustment of circuit element values, insertion of a protection circuit, addition or change of a feedback circuit, and the like are performed to prevent abnormal changes. In addition, when the control program executed by the microcomputer 26 ends in an error or falls into an infinite loop at a specific processing step or a specific function, the control program is changed or a circuit that outputs information that causes an error Debug by design change.

  As described above, state information is very useful for maintenance and development. However, when state information is diverse, not all state information is always necessary for maintenance and development. Further, if a process for acquiring and outputting a large amount of information is performed, the processing capability of the microcomputer 26 is devoted to the status information output process, which may impair the stability of the system. In addition, since the information required by maintenance personnel and developers is not all status information, if all the information is output, the effort and ability for maintenance personnel and developers to find the necessary information from a wide variety of information Or a special device that filters special status information is required for maintenance equipment.

(2) Status information selection processing:
Hereinafter, the process of the microcomputer 26 for selecting which state information is output will be described with reference to FIGS. 2 is a flowchart showing the processing of the microcomputer 26 for selecting the status information to be output, FIG. 3 is an example of a selection screen displayed in this processing, and FIG. 4 is an example of how to classify the level and type of each status information. . The processing of FIG. 2 is repeatedly executed while the power of the liquid crystal television 100 is turned on and the microcomputer 26 executes the control processing of the liquid crystal television 100.

  When the process of FIG. 2 is started, it is determined in step S100 whether or not a command for starting the selection process has been input. The command for starting the selection process is a hidden command, a selection input of a predetermined item on the menu screen, or the like. If a command to start the selection process is input, the condition is satisfied and the process proceeds to step S102. If not input, the process is terminated as the condition is not satisfied.

  In step S102, an output item selection screen is displayed. The selection screen is, for example, a screen as shown in FIG. 3 and displays a title “Change debug information output level” and a selection item for selecting which information to output. The displayed selection items are roughly classified into “NORMAL”, an item for outputting all state information, items specified for each level, and items specified for each purpose.

  The state information is classified by purpose and level as shown in FIG.

  In recent product development, each person in charge (department in charge) develops each part individually. In debugging, each person in charge has information on the part that he / she was in charge of and information on the part related to it. You may only want to get it. Also, in the maintenance, if the causal part is estimated, it is only necessary to acquire only the specific part. In such a case, it is preferable to specify information for each purpose and output information for each specific circuit type or each specific processing type.

In the items specified by purpose, “inverter circuit (backlight voltage)”, “power supply circuit (primary voltage)”, “power supply circuit (secondary voltage)”, and the like correspond to “power supply relations”, and the video processing ICs 12, 14 , 16 and 18 correspond to “video related”, the response from the pixel number conversion circuit corresponds to “scaler related”, and the “processing function” being executed in the control process of the microcomputer 26 corresponds to “microcomputer related”. To do.
For the items specified by purpose, the status information is gathered for each desired part or processing unit by the maintenance person or developer, such as “power supply related”, “video processing related”, “scaler”, “microcomputer”, etc. It can be specified. In the item specified by level, when the level goes up, only more serious information is output. For example, at level “1”, information indicating a dangerous value or state from information indicating a value or state to be noted. In level “2”, information indicating values or conditions that need urgent action to information indicating dangerous values or conditions is displayed, and level “3” is displayed. In, only information indicating dangerous values and conditions is displayed. Of course, in the case of designating by level, it may be configured to output only information within a predetermined range, instead of outputting information above the threshold.

  In maintenance and development, priority is usually given to dealing with serious errors and defects, and display by level makes it easy to prioritize maintenance and design changes with higher priority.

  Items to be specified for each level are “1”, “2”, “3”, etc. For example, in the power supply, when level “1” is selected, a voltage equal to or higher than a predetermined first threshold is detected. When the level “2” is selected, the state information is output. When a voltage equal to or higher than a predetermined second threshold is detected, the state information is output. When the level “3” is selected, the state information is output. When a voltage of three or more thresholds is detected, the state information is output (first threshold <second threshold <third threshold). That is, an abnormality in the power supply state is detected by the value of the output voltage or the input voltage. Of course, a threshold value may be provided for each voltage drop to determine the seriousness of the state.

  In the video relationship and scaler relationship, when level “1” is selected, the state information is output when the response time is t1 or longer, and when level “2” is selected, the state information is output when the response time is t2 or longer. When the level “3” is selected, the state information is output when there is no response (t1 <t2). The response time may be different for each video processing IC. That is, the seriousness of the state is determined based on the response time. Of course, it is also conceivable that the microcomputer 26 sends a predetermined command and determines the seriousness of the state based on the content of the response to the command.

  In addition, regarding the microcomputer, when level “1” is selected, state information is output when any of processing functions X, Y, and Z is being processed, and when level “2” is selected, processing function X is output. , Y when the processing function X is being processed when the level “3” is selected. Among the processing functions X, Y, and Z, the processing function executed at the most serious error is X, the processing function executed at the next serious error is Y, and the processing function executed at the next serious error is Z. Of course, the type and number of functions are arbitrary.

  In step S104, it is determined whether any item has been selected and input. This selection input is performed by operating the remote controller 150 or the operation panel 28, and the microcomputer 26 receives a signal corresponding to the operation from the infrared I / F 30 that has received the infrared signal from the remote controller 150 or the operation panel 28. If the selection input is made, the process proceeds to step S106 because the condition is satisfied. If the selection input is not made, the condition is not satisfied and step S104 is repeated.

  In step S106, the setting corresponding to the item selected in step S104 is stored in the register 26d, and the process ends. As described above, the microcomputer 26 that executes the processes of steps S100 to S106 constitutes output information selection means.

(3) Status information acquisition processing:
The processing of the microcomputer 26 that acquires state information and outputs it to the port 32 will be described below with reference to FIGS. FIG. 5 is a flowchart showing a process for determining which status information is set to be output, FIG. 6 is a flowchart showing a process when the status information is set to be output for each level, and FIG. 7 is a status for each purpose. It is a flowchart which shows a process when it is set to output information. The processing of FIG. 5 is repeatedly executed while the power of the liquid crystal television 100 is turned on and the microcomputer 26 executes the control processing of the liquid crystal television 100.

  When the process of FIG. 5 is started, a setting value indicating which state information is output from the register 26d is acquired in step S200. In step S202, it is determined whether the set value corresponds to “NORMAL”, “by level”, or “by purpose”. If the setting value corresponds to “NORMAL”, the process proceeds to step S204. If the setting value corresponds to “by level”, the process proceeds to step s206. If the setting value corresponds to “by purpose”, the process proceeds to step S208.

  In step S204, all state information that can be output (acquired by the microcomputer 26) is output to the port 32. Of course, when there is a lot of information to be output, this output processing may interfere with the processing of the microcomputer 26. Therefore, in the case of “NORMAL”, only information that can grasp the rough state of the liquid crystal television 100 may be output regardless of the purpose and level.

  In step S206, the processing of steps S300 to S310 in FIG. 6 is executed. First, in step S300, it is acquired from the register 26d which level or higher state information is set to be output. In step S302, it is determined to which level the level of the acquired state information belongs.

  In step S304, it is determined whether or not the level determined in step S302 is a level to be output. If it is a level to be output, the condition is satisfied and the process proceeds to step S306, where it is stored in an output buffer (eg, a predetermined area of the RAM 26c). On the other hand, if the level is not an output target, the condition is not satisfied and the process proceeds to step S308.

  For example, if the setting of the register 26d is level “3” and the acquired state information is less than level “1”, “2” or level “1”, step S306 is skipped and step S308 is performed. move on. On the other hand, if the acquired state information is level “3”, the process proceeds to step S306, where the acquired state information is stored in the output buffer, and the process proceeds to step S308.

  In step S308, it is determined whether or not the determination in step S302 has been completed for all (all types) of state information. If all the processes have been completed, the process proceeds to step S310 as the condition is satisfied. If all processes have not been completed, the process from step S302 is repeated as the condition is not satisfied.

  In step S310, the status information stored in the output buffer is output to the port 32, the level-specific output process is terminated, and the process returns to the process of FIG. Returning to the process of FIG. 5, the process is terminated, and after a predetermined time has elapsed, the process of FIG. 5 is started again.

  In step S208, the processes of steps S400 to S410 in FIG. 7 are executed. First, in step S400, what purpose (type) of setting is to be output is acquired from the register 26d. In step S402, it is determined to which type the state information acquired is classified.

  In step S404, it is determined whether or not the level determined in step S402 is output target state information. If the type is an output target, the condition is satisfied and the process proceeds to step S406, where it is stored in the output buffer. On the other hand, if the type is not an output target, the condition is not satisfied and the process proceeds to step S408.

  For example, when the setting of the register 26d is “power supply related”, when the acquired state information is “backlight voltage”, “primary voltage”, or “secondary voltage”, the process proceeds to step S406 and the acquired state information is displayed. The data is stored in the output buffer and the process proceeds to step S408. On the other hand, if the acquired information is related to the video processing IC or is a “processing function”, step S406 is skipped and the process proceeds to step S408.

  In step S408, it is determined whether or not the determination in step S402 has been completed for all (all types) of state information. If all the processes have been completed, the process proceeds to step S410 as the condition is satisfied. If all processes have not been completed, the process from step S402 is repeated as the condition is not satisfied.

  In step S410, the status information stored in the output buffer is output to the port 32, the purpose-specific output process is terminated, and the process returns to the process of FIG. Returning to the process of FIG. 5, the process is terminated, and after a predetermined time has elapsed, the process of FIG. 5 is started again. As described above, the microcomputer 26 that executes the processes of steps S200 to S208, S300 to S310, and S400 to S410 constitutes a state information output unit.

The operation of the present embodiment having the above configuration will be described below.
When a maintenance person or a developer operates the remote controller 150 to input a hidden command, a screen for selecting the output contents of the status information is displayed on the liquid crystal panel 20 as shown in FIG. When the operation of the remote controller 150 is further operated on this screen to move the cursor to “NORMAL” and perform selection input, settings for outputting all state information are written in the register 26d. Then, since all the state information is output to the port 32, all the state information is taken into the PC 200 connected to the port 32. The acquired information is acquired by a predetermined application executed on the PC 200 and displayed on the screen, and a maintenance person or a developer can grasp the state of the liquid crystal television 100 by viewing this display.

  Further, when an operation input for selecting “level 3” is performed on the screen of FIG. 3, only the state information corresponding to level 3 is set in the register 26d. Then, it is determined which of FIG. 4 corresponds to the contents of the state information, and only those corresponding to level 3 are output to the port 32. Therefore, only high-severity information corresponding to level 3 is displayed on the screen of the PC 200 connected to the port 32. Therefore, the maintenance person or developer can confirm only the error information that should be resolved with priority. Further, since the information output to the port 32 is small, the processing of the microcomputer 26 is also reduced, which contributes to the improvement of the stability of the liquid crystal television 100.

  In addition, when an operation input for selecting “power supply relation” is performed on the screen of FIG. 3, only the state information related to the power supply is set to be output in the register 26d. Then, only the state information corresponding to the power supply relationship in FIG. For this reason, only power-related information is displayed on the screen of the PC 200 connected to the port 32. Therefore, the maintenance person or developer can confirm only the information related to the part to be maintained or adjusted. Further, since the information output to the port 32 is small, the processing of the microcomputer 26 is also reduced, which contributes to the improvement of the stability of the liquid crystal television 100.

(4) Summary:
That is, in the liquid crystal television 100, the microcomputer 26 acquires information on its own processing function, response information on the video processing ICs 12, 14, 16, 18 and state information such as the voltage status of the power supply circuit 24 and the inverter circuit 23. The information obtained is classified by purpose or level. Then, by specifying the status information to be output by the operation input by the user by purpose or level, only the status information that matches any purpose or only the status information of any level abnormality is sent to the port 32. Output. As a result, information output to the port 32 can be selected and designated.

  In the present embodiment, the liquid crystal television has been described as the electric / electronic device. However, it is needless to say that a CRT television or a plasma television may be used, or a projector or a rear projection television may be used. Moreover, as long as it is an electrical / electronic device provided with a maintenance port that outputs information on each part of the device to a terminal to which an external device can be connected, home appliances, information processing devices, video playback devices, automobile control devices, etc. Applicable to various things.

Needless to say, the present invention is not limited to the above-described embodiments. It goes without saying for those skilled in the art,
・ Applying mutually interchangeable members and configurations disclosed in the above embodiments by appropriately changing the combination thereof.− Although not disclosed in the above embodiments, it is a publicly known technique and the above embodiments. The members and configurations that can be mutually replaced with the members and configurations disclosed in the above are appropriately replaced, and the combination is changed and applied. It is an embodiment of the present invention that a person skilled in the art can appropriately replace the members and configurations that can be assumed as substitutes for the members and configurations disclosed in the above-described embodiments, and change the combinations and apply them. It is disclosed as.

It is a block diagram which shows schematic electrical structure of a liquid crystal television. It is a flowchart which shows the process of the microcomputer which selects the status information to output. It is an example of the selection screen displayed in this process. It is an example of how to classify the level and type of each status information. It is a flowchart which shows the process which judges the output setting of status information. It is a flowchart which shows the process in the output setting according to level. It is a flowchart which shows the process in the output setting according to the objective.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Tuner 12, 14, 16, 18 ... Video processing IC, 14a ... Analog video signal input terminal, 16a ... Digital video signal input terminal, 20 ... Liquid crystal panel, 22 ... Backlight, 23 ... Inverter circuit, 24 ... Power supply Circuit, 26 ... microcomputer, 26d ... register, 28 ... operation panel, 30 ... infrared I / F, 32 ... maintenance port (port), 34 ... IIC bus, 100 ... liquid crystal television, 150 ... remote control, 200 ... PC

Claims (2)

A tuner that receives a required signal from an input television broadcast signal, converts it into an intermediate frequency signal, and outputs it, and a digital video signal expressed in RGB by extracting the video signal from the intermediate frequency signal input from the tuner A first video processing IC that generates and outputs a second video processing IC that generates and outputs a digital video signal expressed in RGB from a video signal input from an analog video signal input terminal, and a digital video A third video processing IC that generates and outputs a digital video signal expressed in RGB from a video signal input from a signal input terminal; the first video processing IC; the second video processing IC; A fourth video processing IC that outputs the digital video signal output from any one of the three video processing ICs by performing pixel number conversion, image quality adjustment, and output processing; A display panel that displays video based on a digital video signal output from the video processing IC on a screen, a drive voltage generation circuit that supplies a drive voltage to the display panel, a CPU, a ROM, and a RAM, and is stored in the ROM A microcomputer that executes a control program on the CPU while using the RAM as a work area, and a predetermined commercial power source is input from the outside to the primary side, and the input voltage is converted to a desired voltage by a transformer to the secondary side. To the tuner, the first video processing IC, the second video processing IC, the third video processing IC, the fourth video processing IC, the drive voltage generation circuit, and the microcomputer. Is connected to the microcomputer so that serial communication is possible, and a maintenance port that can connect external devices, and accepts user operation inputs Includes an operation input device, the,
The microcomputer includes information indicating an input voltage and an output voltage of the power supply circuit, information indicating an output voltage of the drive voltage generation circuit, response information of the first video processing IC, and the second video processing IC. Response information, response information of the third video processing IC, response information of the fourth video processing IC, and information on which function the microcomputer is processing are acquired as status information. In the television that outputs to the maintenance port,
The microcomputer has a register,
The microcomputer displays a screen for selecting which of the status information is output to the maintenance port according to level or purpose, and is output according to the level or purpose selected and input by the operation input device. Is set in the above register,
The microcomputer acquires the setting of the register, and in the case where the setting of the register selects the state information to be output according to the level, the state information determined to be equal to or higher than a predetermined level by determining the level of the acquired state information Only the state information that matches the purpose set by judging the type of the acquired state information. A television that outputs to a maintenance port. In an electrical and electronic device comprising: status information acquisition means for acquiring a plurality of status information by communicating with each part constituting the device; and status information output means for outputting the status information to a connection terminal for connecting an external device.
Output information selection means for selecting whether to specify the output of the state information for the connection terminal by level or by purpose;
First selection means for selecting, by level, which of the state information is output to the connection terminal;
Second selection means for selecting, according to purpose, which of the state information is output to the connection terminal;
With
The status information output means, when the output by level selection is selected by the output information selection means, the status information obtained is a level of the status information more than the level selected by the first selection means, the connection When the output for each purpose is selected by the output information selection means, the status information that matches the purpose selected by the second selection means for the type of status information acquired is output to the terminal. Electrical and electronic equipment characterized by output to

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