KR0139253B1 - Self-diagnostic method of colar television - Google Patents

Abstract

The present invention relates to a self-diagnostic method of power-on " on " color television, which is switched to an operation mode based on a function stored in a memory means under the control of a control means 20 held in standby by a standby power supply, and remotely. Execution of the operation designated by the control means 18 and the color of the volume, channel, and screen data set by the remote control means 18 are stored in the nonvolatile memory 22 to perform signal reproduction in accordance with the status flag. In the television, during the ascending period of rising to the normal power level when the initial power is applied, test data is written to an arbitrary address in the memory means under the control of the control means 20, and the read data is read again to check whether it is normal. The program switching means 30, 32 are connected to the input / output ports I1, I2, I3, --- IN; O1, O2, O3 --- ON of the control means 20, Test day To check the normal connection with the external interface by holding the power supply and comparing the level received through each port, and to suspend the power-on “on” control in case of abnormality, thereby preventing malfunctions under the abnormal conditions of the television. It can be.

Description

Self-diagnosis method of color television at initial power on

1 is a block diagram of a color television employing a self-diagnosis method upon initial power-up according to the present invention;

2 is a view for explaining the operation of the microcomputer executing the self-diagnosis method of the color television when the initial power is applied according to the present invention;

3 is a flowchart illustrating a process of executing a self-diagnosis method of color television upon initial power-up according to the present invention.

* Description of the symbols for the main parts of the drawings *

10 --- tuner, 12 --- IF module,

14 --- audio processing unit, 16 --- image processing unit,

18 --- control function input device, 20 --- controller,

22 --- Data storage, 24 --- OSD processing,

26 --- Sync signal detector, 28 --- Alarm.

The present invention relates to a self-diagnostic method of color television, and more particularly, when the initial power is applied to the color television, a control means such as a microcomputer self-diagnoses the current operating conditions while the power is raised to a normal level. In the case of power supply "on" control, in the case of abnormality, the power supply "on" control is suspended so as to prevent a malfunction.

In general, color television for receiving broadcast signals is widely applied as an image output device of an image reproducing apparatus such as a laser disc reproducing apparatus (LDP) or a video tape reproducing apparatus (VCR). A control means such as a microcomputer in charge of the overall control of the television detects a synchronization signal included in the image transmitted from the image reproducing system and performs a control to automatically switch from the broadcast signal reception mode to the external image mode.

In addition, the color TV employs internal memory such as RAM or EEPROM, and automatically turns on / off the power for bedtime reservation and weather reservation, or algorithms for storing the currently set volume and channel. In the case of diversifying a given function (e.g., voice multiplexing or text multiprocessing) in the color television, the structure of a remote control device such as a remote controller or the design of the corresponding color television to design a selection button for the additional function In order to avoid the complicated structure of the front control panel, when a menu method by OSD (On-screen Display) processing is applied, an algorithm for processing the menu method is stored.

Therefore, the control means employed in the color television checks the state change in relation to the switching control of the operation mode, the function switching by the menu method, and performs appropriate control. Usually, the power plug is connected to the commercial AC power supply for the control means. In the connected state, the power supply is designed such that a standby power is applied to receive a function control input, in particular a power "on" input.

However, when the power cord of the television is completely separated from the commercial AC power, not only the channel preset data and the volume control data but also the state flag such as the TV / video mode are erased and invalidated. When the power cord is connected to a commercial AC power source (hereinafter referred to as initial power supply), as is well known, the control means activates the main AC power line of the power supply device so that the power supply is normally received.

In this case, it takes a long time to get the normal power level from the initial power-up time in the power supply. In addition, it is necessary to reset the channel tuning, volume adjustment, and status flag. It is necessary to check whether or not the ports for normal operation can be prevented.

Therefore, color television has a state flag such as a check for the time-dependent deterioration of the memory means for state control (volume, channel, voice multiple, text multiple) upon power-on, and the stereo / mono setting state. It is necessary to check the port of the button or key for function input, check the interface of the external interface.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and when an initial power supply is applied, the power supply in case of abnormality by checking the memory means and the state check and the normal operation of the external interface under the control of the control means during the rise to the normal power level. The purpose is to provide a self-diagnostic method of color television, which is designed to suspend “on” control to prevent malfunction.

In order to achieve the above object, according to the present invention, the switching of the operation mode based on the function stored in the memory means under the control of the control means maintained in the standby state by the standby power supply, and the operation specified by the remote control means. In a color television that executes and stores the volume, channel, and screen data set by the remote control means in a nonvolatile memory, and reproduces signals according to the state plug, during a rising period of rising to a normal power level upon initial power-up. Under the control of the control means, the test data is written to the memory means at an arbitrary address, and the read data is read again to check whether it is normal, and program switching means are connected to the input / output port of the control means. By applying test data and comparing the level received through each port, It provides the self-diagnosis method of color television when the initial power is applied to check the normal connection with the interface and suspend the control of the power on.

Then, in the case of abnormality as a result of the above-described self-check, the abnormal state is performed with light emitting display or acoustic display while the power supply ON control is suspended.

In the self-diagnosis method of the television according to the present invention, when the initial power is applied, the normal state of the external interface between the memory device and the peripheral IC device is checked under the control of the control means during the period when the power is raised to the normal level. By holding the power "on" control, the light emitting display or the acoustic display is performed, so that the state of the television can be checked at all times.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

1 is a block diagram illustrating a schematic signal processing system of a television to which the present invention is applied. In FIG. 10, reference numeral 10 denotes a tuner for tuning a desired broadcast signal from a broadcast signal received through an antenna ANT. 12 denotes an IF module for processing a broadcast signal of a channel tuned by the tuner 10 at an intermediate frequency, and 14 denotes a voice mode in which the voice signal of the broadcast signal processed by the IF module 12 is selected. , A voice multiplexing unit for processing on the basis of voice multiples, stereo, mono) and providing the voice output signal Aout.

Further, reference numeral 16 denotes to process the video signal of the broadcast signal processed by the IF module 12 or to switch the video signal provided from an external video device such as a VCR, for example, or to display the function of the television. Represents an image processing unit for switching the OSD character information for switching.

Reference numeral 18 is for inputting control functions such as channel selection, volume adjustment, screen adjustment (e.g., contrast, brightness, AFT adjustment, etc.), time setting, and voice multi-mode setting among a plurality of functions given to the television. A control function input device composed of a remote control device such as a control panel or a remote control installed in the front of the television, and reference numeral 20 denotes a control function input port (I1 in FIG. 1) from the control function input device 18. And a plurality of input / output ports (I1, I2, I3 --- IN; O1, O2, O3 --- ON) in accordance with the control function input from the control function input device 18. As a control unit for controlling the function of the television, the control unit 20 outputs the polar data V _T from the O1 port for tuning of the corresponding channel at the time of the channel selection input from the control function input device 18, Control for volume control When inputting a function or selecting a voice multiple mode, PWM data for volume adjustment or control data for setting a voice multiple mode is output from the O2 port to the voice multiple processing unit 14, and when the TV / video mode is set. Outputs a mode switching signal for switching the video signal from the O2 port to the image processing unit 16 so that the image processing unit 16 processes and outputs an external video signal, and is an item currently being controlled by the television. In the case of OSD processing (e.g., channel selection, volume adjustment, voice mode switching, TV / video mode switching, etc.), a control signal for designating the OSD processing mode is provided from the O3 port to the image processing unit 16.

Here, the control unit 920 switches to a test mode for checking whether normal data exchange with peripheral circuit elements is possible, and input / output ports I1, I2, I3 --- IN; O1, Program switches 30a, -30n, 32a, and -32n, which are programmatically switched to O2, O3 --- ON, are controlled to be switched to the test data output terminal Tout and the test data input terminal Tin.

In addition, the control unit 20 performs self-diagnosis when the power is applied and, in the abnormal state, withholds the power-on " on "

In addition, reference numeral 22 denotes tuning data for all channels selectable by the television when the channel is tuned by the control unit 20, and the currently tuned channel, volume, and screen adjustment state when the power is turned “off”. This data storage unit is automatically configured to store data on a subsequent power-on "on" basis, for example, a nonvolatile memory, preferably an EEPROM, which makes the control unit 20 accessible through the I2 port. 24 shows an OSD display of an item currently being controlled, or an OSD processing unit for displaying an occurrence of an abnormality in the self-diagnosis result when the power is turned on and the contents thereof as an OSD value.

In addition, reference numeral 26 denotes a synchronization signal detection unit for determining whether the external image signal is normally received when the image processing unit 16 switches and outputs an image signal applied from the outside under the control of the controller 20, 28 shows an alarm device composed of an LED for emitting an abnormal state or an acoustic oscillator for transmitting a predetermined sound signal when it is determined that the abnormal state is performed when the self-check is performed under the control of the control unit 20.

The control unit 20 receives and stores data such as a channel, a volume, and a screen state stored in the data storage unit 22 when performing a function for overall control of the television, for example, when the power is “on”. It includes a RAM as a means, and further comprises an auxiliary memory means such as a buffer for temporary storage of data, and, as is well known in addition to the configuration of the circuit portion described above, related to adjustment items such as contrast, brightness, etc., during screen adjustment, for example. Many ports (not shown) to which IC elements are connected are provided.

Next, the self-diagnosis method of the television according to the present invention having the above-described configuration will be described with reference to the flowchart of FIG.

First, when the power cord of the television is reconnected to a commercial AC power source, the standby power is applied to the control unit 20 in a normal manner from the power supply device. In step 40, the control unit 20 controls the control function input device 18. When the power control input from the control panel is applied, the power supply unit is controlled to be in an active state so as to obtain operating power. While the power level is raised from the power-on time to the normal level, the controller 20 sets a test mode for checking whether the RAM is normally operated.

When such a test mode is set, the control unit 20 assigns an arbitrary address to record normal test data on the internal RAM provided as a memory means in step 42, records predetermined test data at the address, and then writes the recorded data. In step 43, the test data is written to an arbitrary address of the RAM and then re-read data is compared to determine whether the RAM is normal by determining whether it is the same.

As a result, if both data are not the same, the flow advances to step 44, even if there is a power-on control input from the control function input device 18, the power "on" control is suspended. The normal operation is not possible through the alarm device 28 composed of a light emitting element such as an LED or a sound generator.

On the other hand, if it is determined in the step 43 that the internal RAM is normal, in step 46, initialization is performed to act as a storage means for storing the control function input from the control function input device 10.

Subsequently, when the self-check on the RAM is completed, the control unit 20 sets a test mode for the data storage unit 22, which is a nonvolatile memory device storing channel tuning data for channel tuning, for example. In step 48, an arbitrary address of the data storage unit 22 is designated, and the data stored at the address is temporarily stored in, for example, the RAM. In step 49, test data is written for the arbitrary address, and then read again, and the It is determined whether the read data is the same as the original test data.

As a result of the determination, if the data do not match, the data storage unit 22 determines that the error is abnormal and performs the process set in step 44. In the normal case, the data recorded in the RAM is stored in step 51. After restoring to the original address of the data storage unit 22, the self-check of the data storage unit 27 is completed.

In addition, the control unit 20 switches to a test mode for checking whether normal data exchange with the peripheral circuit elements is possible in step 52, and input / output ports I1, I2, I3 --- of the control unit 20. Program switches 30a-30n, 32a-32n that are programmatically switched to IN; O1, O2, O3 --- ON are controlled to be switched to the test data output terminal Tout and the test data input terminal Tin. .

In this state, the control unit 20 outputs each test port in a state in which predetermined test data (for example, low level) is applied to the output ports O1, O2, O3 --- ON through, for example, the test data output terminal Tout. If a level different from the level (low level) of the test data is detected by detecting a level input from the input data, the abnormality of the output port is judged, and the power " on " control is suspended as described in the process after step 44. In addition, the abnormality is displayed.

Similarly, the level input from each input port in a state where predetermined test data (for example, low level) is applied to the input ports I1, I2, I3 --- IN through the test data input terminal Tin. If a level different from the level (low level) of the test data is detected, the abnormality of the input port is judged, and the holding of the power " on " control described in the process after step 44 and the display of the abnormal state are performed. . On the other hand, if the result of the inspection of the port for interfacing between the RAM, the data storage unit 22 and the peripheral circuit elements in the above-described check procedure is normal, the controller responds to the "on" control of the power supply from the control function input device 18. To execute normal operation.

That is, if the check result is normal, the control unit 20 activates the power supply device in response to the " on " control of the control function input device 18, and adjusts the tuning voltage in response to the channel tuning input. The broadcast signal tuned by the tuner 10 by being applied to the tuner 10 is reproduced through the IF module 12, the audio multiplexer 14, and the image processor 16, and the control unit in relation to such an operation mode. The OSD is displayed through the OSD processing unit 24 under the control of 20. In addition, when the TV / video mode is set to the video mode, it is possible to perform the video mode according to the synchronous signal detection state by the synchronous signal detection unit 26.

As described above, according to the self-diagnosis method of the television when the initial power is applied, the input / output port, RAM, and peripheral circuit elements are controlled under the control of the controller while the power is raised to the normal level from the initial power-on time. In the event that an error factor is determined by checking a state related to interfacing, a power-on “on” control is suspended so that a malfunction can be prevented under an abnormal condition of the television. The discrimination becomes easy.

Claims (2)

Switching of the operation mode based on the function stored in the memory means under the control of the control means 20 maintained in the standby state by the standby power supply, execution of the operation specified by the remote control means 18 and the remote control means. In a color television that stores the volume, channel, and screen data set by (18) in the nonvolatile memory 22, and reproduces signals in accordance with the status flag. During the ascending period of rising to the normal power level when the initial power supply is applied, test data is written to the memory means at an arbitrary address under the control of the control means 20, and the read data is read again to check whether it is normal and the control is performed. The program switching means 30, 32 are connected to the input / output ports I1, I2, I3 --- IN; O1, O2, O3 --- ON of the means 20 to apply test data of a predetermined level. By comparing the level received through each port, by checking whether the normal connection with the external interface, the power-on control in case of abnormal power supply, color TV self-diagnosis characterized in that the. 2. The self-diagnosis method of color television when the initial power is applied according to claim 1, wherein in the case of an abnormality of the above-described self-checking, the power-on "on" control is carried out and an abnormal state is displayed.