KR20010011898A - Initiallizing method of an automatic set for preventing a black current of monitor - Google Patents

Abstract

PURPOSE: A method for initializing an automatic set is provided to sense a screen blanking before the screen blanking is generated, which is caused by peripheral unfavorable conditions, and to automatically turn on/off power, thereby preventing screen damage and increasing product reliability. CONSTITUTION: If a standby power is supplied, an automatic start(AST) bit of a micro processor is set up as '1', and power is turned on. A TV system confirms a black current feedback(BCF) bit for displaying screen stability and instability, after standing by for a predetermined time. The TV system waits until the BCF bit becomes '0' which represents a stable state of a screen. If the BCF bit becomes '0', the TV system sets up the AST bit as '0', and performs a normal operation of the screen. The TV system checks the BCF bit, to prevent a screen blanking from being generated, which is caused by unfavorable conditions while the screen is normally operated. If the BCF bit is changed into an unstable state '1' from the stable state '0', the TV system turns off the power and resets a system to an initial state.

Description

Initializing method of an automatic set for preventing a black current of monitor}

The present invention relates to a method of initializing a set for automatically preventing the blanking from occurring due to a bad condition of a surrounding environment in a TV system using a microprocessor.

In general, the microprocessor inputs while retrieving information such as procedures and conditions necessary for the above-described control functions stored in the program memory or registers with a calculation function, a clocked timer function, and other control functions therein. It is well known that the operation of the input / output means such as the means, the power control means, the display control means and the audio output means is controlled quickly and accurately.

In an electronic product or a system such as a TV using a microprocessor, when a bad environment is maintained or a bad situation occurs around the system, the system becomes unstable and a normal screen cannot be maintained.

In other words, if the screen suddenly generates static electricity or is under the influence of thunder and lightning, the system will affect the microprocessor controlling the system as well as causing fatal errors or malfunctions.

In a typical TV system, the system enters the standby state by the set initialization control of the microprocessor and operates normally (when the TV screen is turned on), and suddenly is abnormal due to the aforementioned static electricity, forced discharge of the CRT, and other external shocks. If a pulse is introduced, the screen is in a return state and there is a problem in that the normal operation does not work. The reason is that once the set is initialized or turned on, there is no control action to reset it again in the microprocessor.

Therefore, conventionally, when a blank is generated on the screen due to the aforementioned reasons, it is inconvenient because the user intentionally unplugs and reinserts the power cord to force the set to be forcibly reset (power off / on). There was a problem of lowering the reliability.

Accordingly, the present invention has been made to solve such a consumer's inconvenience, the object of the present invention is to detect the return state on the screen due to the adverse conditions of the surrounding, it is detected before the return occurs and automatically turn off the power It provides an automatic set initialization method that can be turned on / off.

1 is a schematic block diagram of a TV system with a microprocessor;

2 is a flowchart illustrating an automatic set initialization method according to the present invention.

In order to achieve the above object, the present invention provides a method for automatically initializing a set in a TV system having a microprocessor.

When the standby power is supplied, setting the automatic start (AST) bit of the microprocessor to '1', then turning the power ON, waiting for a predetermined time, and then displaying a stable and unstable state of the screen. Checking the (Black Current Feedback) bit, waiting for the BCF bit to become a zero indicating stable state, and setting the auto start bit to '0' when it becomes '0'. In the normal operation of the screen, and in the set state of normal operation, the BCF bit is checked to be unstable in the normal state of '0' to prevent the recurrence caused by external adverse effects during the normal operation of the screen. When the value is changed to '1', the power is automatically turned off, and then the system is initialized to the initial state, and the method is automatically detected and initialized automatically before the screen is returned. to provide.

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

1 is a block diagram illustrating a method of controlling a TV system using a microprocessor.

Referring to FIG. 1, the remote controller signal input from the remote controller 1 is received by the remote controller module 2 and then input to the microprocessor 3.

At this time, the microprocessor 3 receives the key signal by the remote control module 2 or the key matrix 4 to perform various functions of the TV. If the channel tuning key is pressed in the remote controller module 2 or the key matrix 4, the microprocessor 3 generates a phase lock loop (PLL) signal for controlling the tuner 5 and the tuner 5 ) Tunes the television broadcast signal received via the antenna 6.

The signal tuned by the tuner 5 is applied to the voice processing IC 8 and the chroma IC 9 via an intermediate frequency amplifier (IF) 7, which is voiced from the microprocessor 3. The voice signal via the voice processing IC 8 that receives the control signal is amplified by the voice amplifier 10 and then output to the outside through the speaker 11, and the color signals R, G, and B are the same. It is output from the chroma IC 9 that receives the video control signal from the microprocessor 3 and is applied to the video processing IC 12.

The video processing IC 12 includes an on-screen display color signal output from the screen display IC 13 receiving the data signal DATA, the clock CLK, and the strobe signal STROBE from the microprocessor 3. The television broadcast color signal is video-processed and provided to the driver 14 so that the monitor 15 displays television broadcast and / or on-screen display characters.

Then, the microprocessor 3 receives the interrupt signal from the power interrupt generator 16 and the reset signal from the reset unit 17 to determine whether the power supply state is normal, thereby controlling the power control unit 18, It is to control the internal power supply.

According to the present invention, in the TV system having the above-described configuration, during the normal operation of the screen, a return is generated in advance when an abnormal pulse flows due to an unfavorable environment or situation around the screen so that the BCF bit indicating the normal state of the screen changes. In order to prevent this, the automatic set initialization method according to the present invention will be described with reference to the flowchart of FIG. 2.

First, the supply state of the standby power is checked (S10). When the power is normally supplied, the automatic start bit is set to '1' and the power is turned on to enter the initial control mode of the microprocessor (S20).

Subsequently, the apparatus waits for a predetermined time, for example, about 1.5 seconds (S30).

Next, check the BCF (Black Current Feedback) bit indicating the stable and unstable state of the screen (S40). In this case, the BCF is a bit that serves to drive the R, G, and B signals after the CRT is aged, and displays the stability of the screen by receiving a feedback from the CRT stage. Done.

In this step, wait until the BCF is '0', that is, the screen is in a stable state, and when the BCF is '0', the system is set to ready by setting the AST bit, which is an auto start bit, to '0'. (S50).

Subsequently, various functions of the TV are normally operated using the microprocessor described in FIG. 1 (S60).

In this case, assuming that the current flowing when the screen is in a blank state and / or an unstable state is black current, when such a black current flows, the BCF bit is taken as '1' to indicate that the screen is abnormal.

Therefore, in the present invention, the step of continuously checking the BCF bit is performed even in a state in which the set is in normal operation (S70). In this way, the BCF bit is checked to detect the case where the normal state is changed from '0' to '1' by the external environment described above, and when the BCF is identified as '1', the power is automatically turned off. In addition, the reset is reset to the initial power-on state (S80).

Therefore, when recursion occurs due to static electricity or external impact as in the prior art, the user can remove the trouble of unplugging and re-operating the power cord directly, and can protect the screen by preventing recursion.

Incidentally, the present invention is not limited to the above-described embodiment, and various other configurations can be taken without departing from the gist of the present invention.

As described above, according to the present invention, if there is a possibility that a screening condition may occur on the screen due to the surrounding bad condition, the present invention provides an automatic set initialization method capable of automatically detecting power before turning off and turning on / off the power. In addition, it prevents damage to the screen and reduces the inconvenience to the consumer and has the effect of making the product reliable.

Claims (1)

A method of automatically initializing a set in a TV system with a microprocessor, the method comprising: Setting the automatic start bit of the microprocessor to '1' when the standby power is supplied, and then turning on the power (ON); Checking a black current feedback (BCF) bit indicating a stable and unstable state of a screen after waiting a predetermined time; Waiting for the BCF bit to become a zero indicating a stable state and setting the automatic start bit to '0' when the BCF bit is '0', and then performing normal operation of a screen; In order to prevent the recursion caused by external adverse influence during normal operation of the screen in the state set to normal operation, the power is automatically turned off when the BCF bit is checked and changed from '0' in normal state to '1' in unstable state. OFF), and then performing a step of resetting the system to the initial state, automatic set initialization method for preventing the screen from returning.