KR100651928B1 - Display apparatus and method for controlling thereof - Google Patents

Abstract

The present invention relates to an image device capable of preventing an initialization error of a display module and a reset method thereof. The present invention provides a video device including a display module for displaying an image and an inverter for supplying power to the display module, wherein a main power is supplied to supply a standby power to a motherboard micom, and the inverter from the motherboard micom When a control signal is applied to turn on the power supply to each board or circuit in the video device, each of the multi-level, and the main board by detecting the inverter on / off control signal with the on / off detection of the main power supply And a main board including a power board for generating a reset signal of the microcomputer, and a main board microcomputer for generating a control signal for turning on the inverter when the standby power is supplied from the power board. It provides a video device. Therefore, according to the present invention, the initial operation of the video device may be sequentially performed to prevent the initialization error.

Micom reset

Description

Image apparatus and control method thereof

1 is a block diagram illustrating a video device according to the related art.

2 is a block diagram illustrating a video device according to the present invention.

3 is a flowchart for explaining a method of resetting an imaging apparatus according to the present invention.

* Explanation of symbols for main parts of drawings *

10: display module 20: power board

22: relay 23: power board microcomputer

30: motherboard 31: motherboard microcomputer

40, 50: inverter

The present invention relates to an image device, and more particularly, to an image device capable of preventing an initialization error of a display module and a reset method thereof.

Broadcasting is a mass media that targets an unspecified number, which is advantageous because it can be compressed like computer data compression because all elements (video, audio, data) are treated digitally.

After color TV broadcasting, stereo sound, remote control device, subtitle broadcasting, data broadcasting, etc. have adopted some digital technologies. In the 90's, computer and network technologies have been spreading more rapidly, so that the broadcasting field can realize high-definition and multifunctional TV. Digital TV was pursued as a video device.

In the case of digital TV (hereinafter, DTV), one program of HDTV level and three or more programs of SDTV level can be transmitted to one channel, and digital signal transmission and processing make it possible to enjoy a much cleaner screen. The ghost phenomenon can be solved on its own, and radio waves reflected by obstacles can be solved on their own.

Looking at the status of domestic broadcasting, after the pilot broadcast in 2000, the metropolitan area is performing the main broadcast in 2002, the metropolitan city is scheduled for 2004, and will complete the conversion of DTV broadcasting by 2010.

Recently, DTV has been implemented using LCD or PDP module in CRT or projection TV. Such LCDs and PDPs have the advantage of being considerably thinner than CRTs or projection methods.

Among them, the LCD module is largely composed of an LCD panel, a backlight, and a driving chip.

LCD (Liquid Crystal Display) panel literally means a display made of liquid crystal, which cannot emit light by itself. Therefore, the backlight unit is used for this purpose.

Fluorescent lamps are commonly used as backlight units of LCD monitors.

In order to drive the backlight unit of the LCD module, a DC-AC inverter is used. In addition, the driving chip is a driving circuit chip for driving the LCD monitor with a driver IC.

Hereinafter, a conventional imaging apparatus will be described with reference to the accompanying drawings.

1 is a block diagram illustrating a video device according to the prior art.

The video apparatus 100 according to the related art is composed of a display module 10, a power board 20, a main board 30, and first and second inverters 40 and 50.

The display module 10 is a liquid crystal display (LCD) module or a plasma display panel (PDP) module.

The power board 20 is composed of a power board microcomputer 21 and a relay 22 to directly receive AC power, which is a main power source, and thus, the main board 30, the display module 10, and the first in the video device 100. The power supply (multi-power supply: 33V, 24V, 12V, 5V, etc.) required by the second inverters 40 and 50 is supplied.

The main board 30 is composed of a main board microcomputer 31 and a data driving circuit, a gate driving circuit, and an inverter control circuit, which are circuits related to controlling video equipment, and as the standby power source 5v is supplied from the power board 20. The relay 22 on / off control signal PWR1 of the power board 20 is used to control the driving of a circuit related to the video apparatus control and to control on / off of the first and second inverters 40 and 50. Generates.

The first and second inverters 40 and 50 supply the AC power required by the backlight (not shown) of the display module 10 according to the on / off of the relay 22.

Referring to the operation of the video device according to the prior art briefly, first, when AC power, which is the main power supply, is supplied to the power board 20, the power board microcomputer 21 of the power board 20 uses the standby 5v as the main board ( It is supplied to the main board microcomputer 31 of 30).

The main board microcomputer 31 generates a PWR 1 signal high, which is a relay on control signal, to turn on the inverters 40 and 50 to the power board 20 as the standby 5v is applied. As the PWR1 signal is supplied, the relay 22 is turned on, and the power board 20 displays the display module 10, the main board 30, the first and second inverters 40 and 50 in the video device. Provides a variety of multi-level power supplies needed.

In addition, the main board microcomputer 31 sequentially starts control-related circuits (data driving circuits, gate driving circuits, inverter control circuits, etc.) and TV-related circuits (tuners, etc.) in the video device in a set sequence. On the other hand, the state of the display module 10 is checked.

However, in such a conventional video device, the main power supply (power plug) is suddenly turned off due to user's carelessness or power failure as the display module is composed of an LCD module or a PDP module. Insertion) could occur. The predetermined time is about 12 seconds for a 40-inch 300W LCD TV.

In such a case, the power board microcomputer must supply various multi-level powers required by the display module 10, the main board 30, the first and second inverters 40 and 50 in the video device. At this time, the standby power supplied from the power board to the motherboard microcomputer is continuously supplied to the motherboard microcomputer by the capacitance for about 10 seconds, so the motherboard microcomputer could not recognize the situation after the sudden main power off.

Therefore, even if the main board micom needs to restart the control circuits in the video device in the order set when the video device is initialized, it may not perform such an operation or operate only some control circuits. There was a problem that an abnormal screen may be displayed (bad screen) through the module.

In order to solve such a problem, a problem arises in that the power plug is forcibly turned off from the outlet and then inserted into the outlet after a predetermined time (more than 10 seconds).

The present invention is to solve the above problems, an object of the present invention is to detect the abnormal state of the main power supplied to the video device by forcibly initializing the motherboard microcomputer image that can prevent the initialization error of the display module It is to provide a device and a reset method thereof.

In order to achieve the above object, the present invention provides a video device including a display module for displaying an image, and an inverter for supplying power to the display module, when the main power is input to supply a standby power to the motherboard microcomputer, When a control signal for turning on the inverter is applied from the main board microcomputer, power is supplied to boards or circuits in the video device, and the inverter is turned on / off with the on / off detection of the main power. A main board including a power board for detecting a control signal and generating a reset signal of the main board micom, and a main board micom for generating a control signal for turning on the inverter to the power board when a standby power is supplied from the power board. Imaging device comprising a board To provide.

Here, the power board detects a control signal from the motherboard micom for turning on / off the inverter together with the on / off detection of the main power supply and further adds a power board micom for generating a reset signal of the motherboard micom. It is preferable to include.

The main board microcomputer detects the on / off of the main power and detects a control signal for turning on / off the inverter. When the inverter on control signal is detected while the main power is off, the main board is detected. Preferably, the microcomputer is configured to generate the motherboard microcomputer reset signal.

According to another embodiment of the present invention for achieving the above object, in the control of the video device including a display module for displaying an image, and an inverter for supplying power to the display module, the main power of the video device is turned on And supplying standby power from the power board to the microcomputer of the main board, and generating the inverter on control signal to the power board as the standby microcomputer is supplied, and the inverter on control. And a microcomputer of the power board in the state of generating a signal, detecting the main power and generating the main board micom reset signal to the main board micom when the main power is off. Provides a reset method.

Here, when the main power is turned on in the state where the inverter on control signal is generated, the power board supplies various multi-level power required by various boards and circuits in the video device, and the microcomputer of the power board. And detecting the main power off and generating the main board micom reset signal to the main board micom when the main power is off and the inverter control signal is in the on state.

Therefore, according to the present invention, an initialization error of the display module of the video device can be prevented.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

2 is a block diagram illustrating a video device according to the present invention.

The imaging apparatus 100 according to the present invention includes a display module 10, a power board 20, a main board 30, and first and second inverters 40 and 50.

The display module 10 is a liquid crystal display (LCD) module or a plasma display panel (PDP) module.

The power board 20 is composed of a power board microcomputer 23 and a relay 22 to directly receive AC power, which is a main power source, the main board 30, the display module 10, and the first in the video device 100. The power supply (multi-power supply: 33V, 24V, 12V, 5V, etc.) required by the second inverters 40 and 50 is supplied.

The main board 30 is composed of a main board microcomputer 31 and a data driving circuit, a gate driving circuit, and an inverter control circuit, which are circuits related to controlling video equipment, and as the standby power source 5v is supplied from the power board 20. Controlling the driving of the video device control-related circuit and generating a relay 22 on / off control signal PWR1 of the power board 20 for supplying power to the first and second inverters 40 and 50. Let's do it.

In addition, the present invention power board microcomputer 23 detects the on / off of the main power supply AC and relay on supplied to the relay 22 to turn on / off the first and second inverters 40 and 50. When the on / off control signal of the relay 22 is on and off while the on / off control signal PWR1 is detected, the motherboard microcomputer 31 generates a motherboard microcomputer reset (initialization) signal.

The first and second inverters 40 and 50 supply AC power required by a backlight (not shown) of the display module 10.

Referring to the operation of the video device according to the present invention briefly, first, when AC power, which is the main power supply, is supplied to the power board 20, the power board microcomputer 23 of the power board 20 uses the standby 5v as the main board ( It is supplied to the main board microcomputer 31 of 30).

The main board microcomputer 31 generates a PWR 1 signal high which is a relay on control signal to the power board 20 when the standby 5v is applied. As the PWR1 signal is supplied, the power board 20 supplies various multi-level power supplies required by the display module 10, the main board 30, the first and second inverters 40 and 50 in the video device. To supply.

In addition, the main board microcomputer 31 sequentially starts control-related circuits (data driving circuits, gate driving circuits, inverter control circuits, etc.) and TV-related circuits (tuners, etc.) in the video device in a set sequence. On the other hand, the state of the display module 10 is checked.

In addition, the power board micom 23 detects on / off of AC, which is a main power supply, and relays on / off supplied to the relay 22 to turn on / off the first and second inverters 40 and 50. The control signal PWR1 is detected. If the on / off control signal PWR1 supplied to the relay 22 is high when the main power AC is on, the control signal PWR1 is determined to be normal. If the on / off control signal PWR1 supplied to 22 is in the off state, it is determined to be normal operation. In this case, the power board micom 21 may directly receive the PWR1 signal as shown in FIG. 2 or determine the PWR1 signal level through the relay 22.

However, the on / off control signal PWR1 supplied to the relay 22 to control the on / off of the first and second inverters 40 and 50 when the main power AC is in the off state is high. If it is, it is determined that the operation is not normal to generate the motherboard micom reset signal (PWR2) to the motherboard micom (31). Therefore, even if the main power is turned on again within a predetermined time from the main power off state, the motherboard microcomputer 31 sequentially restarts the control-related circuits in the video device 100 according to the set sequence to restore the normal screen. Can be displayed.

3 is a flowchart illustrating a video device reset method according to the present invention.

In the method of resetting the video device according to the present invention, when the main power of the video device is turned on (S10), the standby power is supplied from the power board to the main board (the microcomputer of the main board) (S20).

As the standby 5v is applied, the main board microcomputer generates a PWR 1 signal high which is a relay on control signal for supplying power to the first and second inverters 40 and 50 to the power board 20 (S30). ).

When the PWR1 signal supplied to the relay is turned on, the power board microcomputer determines whether the main power source AC is on (S40).

As a result of determination (S40), when the PWR1 signal is on and AC, the main power source, is on, various types of display modules 10, main board 30, first and second inverters 40 and 50 required in the video apparatus are required. Supply multi-level power (S50).

However, when the determination result (S40) PWR1 signal is on and the main power supply AC is off, the motherboard micom reset signal is generated to the motherboard micom (S60).

Subsequently, the power board micom determines whether the PWR1 signal supplied to the relay is on to control the on / off of the first and second inverters 400 (50) while the main power is off (S70).

As a result of the determination (S70), if the main power AC is off and the PWR1 signal supplied to the relay is on, a reset signal is generated to the motherboard microcomputer (S60).

However, the determination result (S70), if the main power source AC is off and the PWR1 signal supplied to the relay is not on, that is, the video device is terminated.

In the video device and the reset method thereof according to the present invention, even if the main power is abnormally turned off and then on, the power board micom generates a control signal for initializing the main board micom and initializes the video device in the set order to display the normal screen. It can work.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (6)

A display module for displaying an image; A main board generating a control signal (PWR1 signal) for supplying voltage to the display module when a standby power is supplied; When a control signal (PWR1 signal) for turning on the voltage supply from the main board to the display module is applied, each of the multi-level power is supplied to each circuit in the video device, and the PWR1 is turned off when the main power is off. And a power board for generating a reset signal for resetting the microcomputer of the main board when the signal is on. The method of claim 1, wherein the power board Determining whether the main power supply is on / off and the PWR1 signal on / off to determine whether the abnormal off state, and if it is determined that the abnormal off state power board micom further controls to generate a reset signal of the motherboard micom Imaging device comprising a. The method of claim 1, Further comprising an inverter for supplying power to the display module, The inverter is controlled by the on / off of the PWR1 signal. The method of claim 1, wherein the power board It further includes a relay for controlling the power supply of the power board, And the relay is controlled by the PWR 1 signal of the main board, and when the relay is turned on, the power board supplies respective multi-level power to respective circuits in the video device. Supplying standby power when the main power is on; Generating a control signal (PWR1 signal) for supplying a voltage to a display module as the standby power is supplied; And generating a reset signal of the motherboard microcomputer when the main power is turned off while the PWR 1 signal is generated. The method of claim 5, And when the PWR signal is generated when the main power is on, supplying various multi-level powers required by various boards and circuits in the video device.

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