KR20020029836A - Method and apparatus for preventing misbehavior of display device - Google Patents

Abstract

PURPOSE: A device and a method for preventing a wrong operation of a video display apparatus are provided to detect a wrong operation of an LCD(Liquid Crystal Display) module to control operations of the LCD module, and to inform a user of the wrong operation if the wrong operation is continued. CONSTITUTION: In an interface part(100), a data processor(101) processes inputted R/G/B(Red/Green/Blue) video signals to be displayed on a screen according to a predetermined control signal. A transmitting unit(102) compresses the R/G/B video signals output in the data processor(101), to transmit the compressed R/G/B video signals to a display module(200). A first microcomputer(103) controls power supply of the display module(200) according to signals fed back from the display module(200). A module power switch(104) supplies power to the display module(200) according to a control signal of the first microcomputer(103). In the display module(200), a power switch(202) supplies driving power to each unit according to the power supplied from the interface part(100). A receiving unit(201) restores the compressed R/G/B video signals transmitted from the interface part(100) to video signals capable of being displayed on the screen. A second microcomputer(203) detects an error state of the R/G/B video signals received to the receiving unit(201) or an error state of power supplied from the power switch(202), to feed back error signals to the interface part(100).

Description

Method and apparatus for preventing misbehavior of display device

The present invention relates to a video display device, and more particularly, to an apparatus and method for preventing malfunction of a video display device.

In general, a video display device is a series of video signals of the video mode such as SVGA (800 × 600), XGA (1024 × 768), SXGA (1280 × 1024) transmitted from the video card of a PC or workstation This device displays on the screen through signal processing.

These days, starting with a monitor using a cathode ray tube, a digital display using a liquid crystal display (LCD) is becoming a representative flat panel display device suitable for large monitors according to the trend of the increase in the size of display devices according to the development of modern technology. It is true.

Thus, the monitors to date have adopted the method of receiving the video data unilaterally from the main body.

In addition, since such monitors have horizontal and vertical sync signal frequency limits of input images that can be processed for each model, image processing is performed when the horizontal and vertical sync signal frequencies of the video input from the PC are within the limits. If the limit is exceeded, image processing cannot be performed.

Hereinafter, the image display device according to the related art will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a video display device according to the prior art.

As shown in FIG. 1, the image display device according to the related art has analog R / G / B data and horizontal / vertical digital enable (DE) signals transmitted from a video card according to a control signal of the first microcomputer 13. Data processing unit 11 for converting the signal into a predetermined digital signal, and a transmission unit 13 for compressing and outputting digital R / G / B data and horizontal / vertical digital enable (DE) signals outputted from the data processing unit 11. ), A module power switch 14 for applying driving power to the display module 20 according to the control signal of the first microcomputer 13, and digital image data and driving power to the display module 20 at regular intervals. The interface unit 10 including the first microcomputer 13 to be controlled to be applied, and the digital R / G / B data and the horizontal / vertical digital enable signal are received by receiving the compressed image data from the transmitter 13. To restore The power supply unit 22 receives power from the receiving unit 21, the module power switch 14 to output the power supply 22 to supply driving power to each unit in the display module 20, and receives power from the power switch 22. The display module 20 includes a second microcomputer 23 that recognizes input digital R / G / B data according to a horizontal / vertical digital enable (DE) signal and controls a screen output.

Referring to the operation of the image display device according to the prior art configured as described above, as shown in Figure 1, the data processing unit 11 in accordance with the control signal of the first microcomputer 13 R / G / B image data and horizontal / vertical The data enable signal DE is received and converted into a predetermined digital signal and output.

The transmitter 12 converts the R / G / B image data and the horizontal / vertical data enable (DE) signal, which are converted into the digital signal according to the control signal of the first microcomputer 13, into predetermined image data. Output

The module power switch 14 supplies power to the display module 20 according to the control signal of the first microcomputer 13.

Subsequently, image data and power are supplied at predetermined time intervals according to the control signal of the first microcomputer 13.

In addition, the power switch 22 of the display module 20 receives a predetermined power supplied according to a control signal of the first microcomputer 13 in the interface unit 10 to receive the second microcomputer 23 in the display module 23. And power to the receiver 21.

The receiver 21 operates by power supply of the power switch 22 to restore compressed image data input from the interface unit 10 to enable R / G / B data and vertical / horizontal data enablement ( Output with DE) signal.

Subsequently, the second microcomputer 23 controls the R / G / B data input from the receiver 21 to be displayed on a display panel (not shown) by a horizontal / vertical data enable (DE) signal. .

The image display device according to the related art described above may detect or correct an abnormal operation even when a normal display operation is not performed when an abnormality occurs in R / G / B image data or power input to a display module. There was no problem because the screen is not displayed continuously.

Therefore, the present invention has been made to solve the above problems, and detects the abnormal operation of the LCD module to control the operation of the LCD module, the malfunction of the video display device to notify the user if the abnormal operation persists It is an object of the present invention to provide a prevention apparatus and method.

1 is a block diagram showing the configuration of a video display device according to the prior art;

2 is a block diagram showing a malfunction preventing apparatus of a video display device according to the present invention;

3 is a flowchart illustrating a method of preventing malfunction of an image display device according to an exemplary embodiment of the present invention.

＊ Explanation of symbols for main parts of drawing

101: data processing unit 102: transmitting unit

103: first microcomputer 104: module power switch

201: receiver 202: power switch

203: second microcomputer

In order to achieve the above object, an apparatus for preventing malfunction of an image display device according to the present invention includes an interface unit for controlling processing and power supply so that an R / G / B image signal input according to a predetermined control signal can be displayed on a screen. And a display module for displaying the R / G / B video signal on the screen according to the power supply of the interface unit and detecting an abnormal state of the R / G / B video signal and power supply and feeding back to the interface unit. It is characterized by including a display unit for displaying an abnormal state according to the control signal of the interface unit.

In the method of preventing malfunction of an image display apparatus according to the present invention for achieving the above object, in the method of preventing malfunction of an image display apparatus having an interface unit, a display module, and a display unit, if the power supplied from the interface unit is not normally supplied, Feeding back an abnormal power supply state to the interface unit without operating the display module; and if power is normally supplied from the interface unit but abnormal R / G / B image data is input, the display unit is not operated. Feeding back an abnormal state of the R / G / B image data, and resetting the inside of the display module when a reset signal is generated from the interface unit fed back with the power abnormal state or the abnormal state of the R / G / B image data. Re-powering the power supply; If the display module does not operate normally after resupplying, the display module may include displaying an abnormal state on the display unit.

Hereinafter, an apparatus and method for preventing malfunction of an image display device according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating a malfunction preventing apparatus of an image display apparatus according to the present invention, and FIG. 3 is a flowchart illustrating a malfunction preventing method of the image display apparatus according to the present invention.

As shown in FIG. 2, an apparatus for preventing malfunction of an image display device according to the present invention is an interface for controlling processing and power supply so that an R / G / B image signal input according to a predetermined control signal can be displayed on a screen. The unit 100 and the R / G / B video signal are displayed on the screen according to the power supply of the interface unit 100, and the abnormality of the R / G / B video signal and the power supply is sensed. The display module 200 that feeds back to the unit 100, and the display unit 300 for displaying whether the abnormal state is detected.

The interface unit 100 may include a data processor 101 for processing an R / G / B video signal input according to a predetermined control signal as a displayable signal on a screen, and an R / G output from the data processor 101. The transmitter 102 compresses a G / B image signal and transmits the same to the display module, and the first microcomputer 103 that controls the power supply of the display module 200 according to a signal fed back from the display module 200. And a module power switch 104 for supplying power to the display module 200 according to the control signal of the first microcomputer 103.

In addition, the display module 200 includes a power switch 202 for supplying driving power to each unit within the module according to the power supply of the interface unit, and the compressed R / G / B image signal transmitted from the interface unit 100. A reception unit 201 for restoring a video signal displayable on a screen, and an abnormal state of an R / G / B video signal received by the reception unit 201 or an abnormal state of power supplied from the power switch 202. The second microcomputer 203 detects and feeds it back to the interface unit 100.

The operation of the apparatus for preventing malfunction of the video display device according to the present invention configured as described above is as follows.

First, the data processor 101 receives a R / G / B image data and a horizontal / vertical data enable (DE) signal according to a control signal of the first microcomputer 103 and displays a predetermined digital signal on a screen. Convert to and print it out.

The transmitter 102 compresses the digital R / G / B image data and the horizontal / vertical digital enable (DE) signal output from the data processor 101 according to the control signal of the first microcomputer 103. Output to the display module 200.

The module power switch 104 supplies the R / G / B image data and power to the display module 200 at predetermined time intervals according to the control signal of the first microcomputer 103.

Subsequently, when R / G / B image data and power are supplied at predetermined time intervals according to the control signal of the first microcomputer 103, the display module 200 drives a display panel to display a screen based on the image data.

The power switch 202 of the display module 200 receives power supplied from the interface unit 100 to supply power to the second microcomputer 203 and the receiver 201 in the display module 203. .

The receiving unit 201 is operated by the power supply of the power switching unit 202 to display digital R / G / B data and horizontal / horizontal images so that the compressed image data transmitted from the transmitting unit 102 can be displayed on the screen. Revert to the vertical data enable signal and output it.

Subsequently, the second microcomputer 203 controls the screen by the R / G / B data input from the receiving unit 201 to be displayed on a display panel (not shown).

On the other hand, the second microcomputer 203 determines whether the frequency of the image data input from the receiving unit 201 is outside the displayable frequency range on a display panel (not shown) or the voltage level of the image data is a reference voltage level. It determines whether it is below.

At the same time, the second microcomputer 203 determines whether the power supplied through the power switch 202 is abnormal.

That is, when there is an error in the power supplied through the power switch 202, proper power supply to the second microcomputer 203 is impossible, and thus the display module 200 may not operate normally in a shutdown state. None can easily detect abnormal conditions.

Meanwhile, as a result of determining whether or not the abnormality is received by receiving the restored R / G / B image data received by the receiving unit 201, the display module 200 does not operate in a shut down state even when abnormal. Abnormal condition can be detected by none.

The malfunction detection method of the video display device according to the present invention configured as described above will be described with reference to FIG.

Referring to FIG. 3, first, it is determined whether power is normally applied to the display module (S1).

Subsequently, when the power is not normally applied to the display module as a result of the determination (S1), the display module is shut down (S2).

Then, the power supply abnormal state is fed back to the interface unit (S3).

On the other hand, if the power is normally applied to the display module (S1), it is determined whether the input R / G / B image data is in a normal state (S4).

As a result of the determination (S4), if the input R / G / B image data is in a normal state, the input R / G / B image data is displayed on the screen (S5).

On the other hand, if the determination result (S4), the input R / G / B image data is not in the normal state, the display module is shut down, and feeds back the abnormal state of the R / G / B image data to the interface unit (S6 ~ S7) .

Subsequently, it is determined whether the reset signal is generated by the signal fed back from the display module in the first microcomputer 103 of the interface unit (S8).

As a result of the determination (S8), if a reset signal is generated at the interface unit, the display module is reset and the power is supplied again (S9).

In operation S10, it is determined whether the display module is normally operated.

As a result of the determination (S10), if the display module does not operate normally, an abnormal state is displayed on the display unit (S11).

As described above, the second microcomputer 203 of the display module 200 detects an abnormal state of the power switch 202 or an abnormal state of the R / G / B image data and causes the interface unit 100 to detect an abnormal state. Feedback).

The first microcomputer 103 receiving the feedback signal generates a reset signal to reset the inside of the display module 200, and then outputs a control signal to the module power switch 104 to display the display. By supplying power to the module 200, the display module 100 can operate normally.

After that, when an abnormality in power supply to the display module 200 occurs or an abnormality in an image signal occurs, an error signal is transmitted to the interface unit 100 again.

Subsequently, if such an error is repeatedly repeated and the error signal is continuously input for more than the number of times or a time previously stored in the microcomputer 103, the microcomputer 103 determines that the situation cannot be coped with by the reset operation control. 300 to generate a light or a beeping sound to the user to recognize the display error.

As described above, the apparatus for preventing malfunction of the video display device according to the present invention has the following effects.

First, it detects the abnormal state of R / G / B image data or power supplied to the display module and resets the display module through the reset signal in case of abnormality. It can improve the user's reliability.

Second, if an abnormal state is continuously detected, the user can recognize the abnormal state through a separate display unit, so that appropriate measures according to the abnormal state can be taken more quickly.

Claims (7)

An interface unit for processing data and controlling power supply so that an R / G / B video signal input according to a predetermined control signal can be displayed on a screen; A display module configured to display the R / G / B video signal on a screen according to power supply of the interface unit, detect an abnormal state of the R / G / B video signal and power supply, and feed it back to the interface unit; And, And a display unit for displaying an abnormal state according to the control signal of the interface unit. The method of claim 1, The interface unit A data processor for processing an R / G / B video signal input according to a predetermined control signal as a displayable signal on a screen; A transmitter for compressing an R / G / B video signal output from the data processor and transmitting the compressed signal to the display module; A first microcomputer controlling a power supply of the display module according to a signal fed back from the display module; And a module power switch for supplying power to the display module according to the control signal of the first microcomputer. The method of claim 2, And the first micom outputs a reset signal for resetting the inside of the display module if the signal fed back from the display module is an abnormal signal. The method of claim 1, The display module A power switch for supplying driving power to each unit in the module according to the power supply of the interface unit; A receiver for restoring the compressed R / G / B video signal transmitted from the interface unit into a video signal displayable on the screen; Preventing malfunction of the video display device, characterized in that the second microcomputer detects the abnormal state of the R / G / B image signal received from the receiving unit or the abnormal state of the power supplied from the power switch and feeds it back to the interface unit Device. The method of claim 1, And the display unit is a light emitting diode or an alarm sound generating unit. In the method of preventing malfunction of an image display device having an interface unit, a display module, and a display unit, Feeding back an abnormal power supply state to the interface unit without operating the display module if the power supplied from the interface unit is not normally supplied; Supplying power to the interface unit normally but feeding back abnormal state of the R / G / B image data to the interface unit without operating the display module when abnormal R / G / B image data is input; Resetting the inside of the display module when the reset signal is generated from the interface unit fed back with the abnormal power state or the abnormal state of the R / G / B image data and supplying power again; And, And displaying an abnormal state on the display unit if the display module is not normally operated after the power supply is resupplyed. The method of claim 6, And displaying the input R / G / B image data on the screen when power and R / G / B image data are normally supplied to the display module.