KR102429771B1 - Apparatus and method for controlling display unit of vehicle - Google Patents

Abstract

The present invention relates to an apparatus and method for controlling a display for a vehicle. The present invention provides an apparatus and method for determining whether a display apparatus operates normally based on a flag signal output from a display apparatus mounted on a vehicle, and controlling the display apparatus to operate normally when it is determined that the display apparatus does not operate normally. suggest An apparatus according to the present invention includes: a normal operation determination unit that determines whether a display device mounted on a vehicle operates normally based on the number of second signals input between first signals input at predetermined time intervals; and a display device controller configured to control the display device to operate normally when it is determined that the display device does not operate normally.

Description

Apparatus and method for controlling display unit of vehicle}

The present invention relates to an apparatus and method for controlling a display unit for a vehicle. More particularly, it relates to an apparatus and method for controlling a vehicle display unit to operate normally.

Conventionally, when the monitor of the vehicle AVN operates abnormally, there is no method for monitoring the abnormal state due to the following reasons.

First, when a separate power is turned on in the head unit, the power in the board is turned on in a predetermined order, and it is difficult to check whether the LCD screen is normally turned on.

Second, there are cases when a user who has confirmed that the LCD screen is not turned on recognizes a defect and turns on the set again. However, if the LCD module is in an abnormal driving state due to noise generated outside the set, there is no way to check it.

Third, there is a possibility that the LCD module may not be able to recover automatically without external manipulation such as reset when it falls into an abnormal driving state.

Korean Patent Application Laid-Open No. 2015-0054279 proposes a method for controlling a display device for a vehicle. However, this method cannot solve the above problem because it cannot check whether the screen of the display device is defective.

The present invention has been devised to solve the above problems, and it is determined whether the display device is operating normally based on a flag signal output from the display device mounted on the vehicle, and the display device is not operating normally. An object of the present invention is to propose a vehicle display control apparatus and method for controlling the display apparatus to operate normally when it is determined.

However, the object of the present invention is not limited to the above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

The present invention has been devised to achieve the above object, and it is a method of determining whether a display device mounted on a vehicle operates normally based on the number of second signals input between first signals input at predetermined times. normal operation determination unit; and a display device controller for controlling the display device to operate normally when it is determined that the display device does not operate normally.

Preferably, the normal operation determining unit determines whether the display apparatus operates normally by comparing the number of the second signals with the reference number.

Preferably, the normal operation determining unit uses a reference number when determining whether the display apparatus operates normally, and the vehicle display control apparatus determines the reference number based on a resolution value of the display apparatus It further includes a crystal part.

Preferably, the reference number determiner uses a vertical resolution value as the resolution value of the display device.

Preferably, the reference number determiner uses a first resolution value and a second resolution value obtained based on a resolution value of the display device when determining the reference number, and is greater than the first resolution value and the second resolution A value smaller than the value is determined as the reference number.

Preferably, the reference number determiner uses a first resolution value and a second resolution value obtained based on a resolution value of the display device when determining the reference number, and sets a first multiple of the resolution value to the first A second multiple that is larger than the first multiple is used as the resolution value and the second multiple is used as the second resolution value.

Preferably, the reference number determining unit uses 1 times as the first multiple and 1.2 times as the second multiple.

Preferably, the normal operation determining unit uses a vertical synchronization signal as the first signals and a horizontal synchronization signal as the second signal.

Preferably, the normal operation determining unit determines whether the display apparatus operates normally based on a time difference between the first signals.

Preferably, when the normal operation determining unit cannot determine whether the display apparatus operates normally based on the number of the second signals, whether the display apparatus operates normally based on a time difference between the first signals decide whether

Preferably, the display device controller controls the display device to operate normally by resetting the display device or re-applying power to the display device.

In addition, the present invention provides a method comprising: determining whether a display device mounted on a vehicle operates normally based on the number of second signals input between first signals input at predetermined time intervals; and controlling the display apparatus to operate normally when it is determined that the display apparatus does not operate normally.

Preferably, in the determining, it is determined whether the display apparatus operates normally by comparing the number of the second signals with the reference number.

Preferably, the determining includes using a reference number when determining whether the display apparatus operates normally, and before the determining, determining the reference number based on a resolution value of the display apparatus further includes

Preferably, in the determining, a vertical resolution value is used as the resolution value of the display device.

Preferably, the determining step uses a first resolution value and a second resolution value obtained based on a resolution value of the display device when determining the reference number, and is greater than the first resolution value and the second resolution A value smaller than the value is determined as the reference number.

Preferably, the determining includes using a first resolution value and a second resolution value obtained based on a resolution value of the display device when determining the reference number, and dividing the first multiple of the resolution value as the first A second multiple that is larger than the first multiple is used as the resolution value and the second multiple is used as the second resolution value.

Preferably, the determining step uses 1 times as the first multiple and 1.2 times as the second multiple.

Preferably, in the determining, a vertical synchronization signal is used as the first signals and a horizontal synchronization signal is used as the second signal.

Preferably, in the determining, it is determined whether the display apparatus operates normally based on a time difference between the first signals.

Preferably, the determining includes whether the display device operates normally based on a time difference between the first signals when it cannot be determined whether the display device operates normally based on the number of the second signals. decide whether

Preferably, the controlling includes resetting the display device or re-applying power to the display device to control the display device to operate normally.

The present invention can obtain the following effects through the configurations for achieving the above object.

First, it becomes possible to check the abnormal state of the LCD by monitoring the abnormal driving state of the LCD with a signal transmitted inside the panel.

Second, when abnormalities such as LCD monitor screen noise occur, the system can automatically recover the monitor screen, and the cause of the occurrence is reflected in the system log, making it easy to troubleshoot the product.

1 is a conceptual diagram schematically illustrating an apparatus for monitoring a normal driving state of an AVN monitor according to an embodiment of the present invention.
FIG. 2 is a reference diagram of the first embodiment for explaining a method of determining whether an AVN monitor is operating normally by a normal driving state monitoring apparatus.
FIG. 3 is a reference diagram of the second embodiment for explaining a method of determining whether an AVN monitor is normally operated by a normal driving state monitoring apparatus.
4 is a conceptual diagram of a display control apparatus for a vehicle according to a preferred embodiment of the present invention.
5 is a flowchart schematically illustrating a method for controlling a display for a vehicle according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, preferred embodiments of the present invention will be described below, but the technical spirit of the present invention is not limited thereto or may be variously implemented by those skilled in the art without being limited thereto.

When the conventional AVN monitor operates abnormally, there is no way to monitor the abnormal state, but according to the present invention, when the monitor operates abnormally, the head unit checks the LCD state in real time and resets the module if it is determined to be abnormal. Alternatively, the status of the LCD module can be normalized by re-applying the power. Hereinafter, an action method after checking the abnormal operation of the monitor will be described in more detail with reference to the drawings.

1 is a conceptual diagram schematically illustrating an apparatus for monitoring a normal driving state of an AVN monitor according to an embodiment of the present invention.

The normal driving state monitoring apparatus 100 determines whether the AVN monitor 110 of the vehicle multimedia system is abnormally driven and restores it.

A separate flag signal is transmitted from the LCD module (not shown) constituting the AVN monitor 110 to the head unit 130 to check whether the LCD module is operating normally or in an abnormal operating state. A separate status signal is transmitted to enable ON) to restore the normal state. The specific method is as follows.

Meanwhile, the head unit 130 includes a CPU 131 and an MCU 132 .

The CPU 131 performs a function of transmitting a video signal to the LCD module.

When the panel control signal 121 is input from the LCD module, the MCU 132 performs a function of resetting the AVN monitor 110 or re-applying power to the AVN monitor 110 (LCD Power On). The MCU 132 also performs a function of controlling the backlight of the AVN monitor 110 (Backlight On).

Meanwhile, in FIG. 1, reference numeral 111 denotes a display area of the AVN monitor 110, and reference numerals 112 and 113 denote a source driver. Also, reference numeral 114 denotes a gate driver.

Hereinafter, the specific method mentioned above will be described.

In the present invention, a separate signal line is connected so that the internal transmission signal 121 of the LCD panel can be transmitted to the head unit (H/U; 130) located outside through the FPC (Flexible Printed Circuit) 120, which is not provided in the prior art. The unit 130 may be designed by adding it so that it can be monitored.

This signal 121 outputs a regular waveform as shown in (a) of FIG. 2 when the LCD panel is normally driven. FIG. 2 is a reference diagram of the first embodiment for explaining a method of determining whether an AVN monitor is normally operated by a normal driving state monitoring apparatus.

It is easy to use the GSP signal as a flag signal among the GSP (Gate Start Pulse) signal, GSC (Gate Shift Clock) signal, and GOE (Gate Output Enable) signal transmitted to the gate driver 114 , and the rest of the signals are also easy to use. It is possible, and a complex configuration is possible.

The method of using the GSP signal and the GOE signal (or the GSC signal) is a GOE signal between the first GSP signal 210 and the second GSP signal 220 that is input thereafter, as shown in (b) of FIG. 2 . 230 (or GSC signal) is counted, and if the count number is within a predetermined count range, it is determined as a normal operation.

The count range is related to the vertical resolution of the LCD panel, and in this embodiment, the count range can be set as follows.

1x vertical resolution < count range < 1.2x vertical resolution

The count range can adjust the normal count recognition range according to the situation.

On the other hand, since the GSP signal is a signal related to the vertical synchronization signal, and the GOE signal and the GSC signal are signals related to the horizontal synchronization signal, an appropriate combination can be used.

The above contents are summarized by example as follows.

First, in the absence of an external video input signal, the LCD panel must be driven using an internal oscillator to prevent damage to the internal panel. At this time, since the LCD panel is not driven in synchronization with an external video signal in general, but operates by itself, it operates at a minimum timing of 40 to 45 Hz rather than 60 Hz. is also possible

Second, it is possible to check whether there is an abnormality in the horizontal synchronization signal by combining the GSP signal and the GSC signal (or the GOE signal). That is, it is possible to check whether there is an abnormality by counting the GSC (horizontal synchronization signal) value between the GSP signal and the GSP signal of the next frame.

On the other hand, the output waveform as shown in FIG. 2 has periodicity and generally has a pulse shape of 60 Hz (16.7 ms). By monitoring this periodic signal, it is possible to check whether the LCD panel is operating normally. FIG. 3 is a reference diagram of the second embodiment for explaining a method of determining whether an AVN monitor is operating normally by a normal driving state monitoring apparatus.

Referring to FIG. 3 , the normal driving state monitoring apparatus 100 may determine whether a normal operation is performed by calculating the time from the current pulse to the next pulse.

First, the head unit 130 measures the time from the current pulse to the next pulse (Pulse Interval Check; S310).

Thereafter, the head unit 130 determines whether the time from the current pulse to the next pulse is within a reference range (16.7 ms±α) (S320).

If it is determined that the time from the current pulse to the next pulse is within the reference range, the head unit 130 determines that the AVN monitor 110 is in a normal state and performs step S310 again. On the other hand, if the time from the current pulse to the next pulse is out of the reference range or an irregular signal is output, the head unit 130 determines that the AVN monitor 110 is in an abnormal state and resets the LCD module (LCD Reset; S330) ) A malfunction of the AVN monitor 110 is restored through power re-applying (LCD Power On; S340).

α can be assigned an appropriate value, and can be appropriately changed according to the timing of the video signal set by the head unit 130 .

If the present invention described above is applied, it is possible to check whether the inside of the AVN monitor 110, which could not be monitored before, is normally driven. Therefore, by resetting or re-applying power when the AVN monitor 110 is abnormally driven, the AVN monitor 110 can be checked. ) can be recovered from the abnormal state.

In addition, if a separate flag signal is provided from the main driver IC of the AVN monitor 110 instead of the transmitted signal inside the AVN monitor 110, it is unnecessary to calculate the time from pulse to pulse, so the load on the system can be reduced. , If there is a problem with the internal signal of the LCD driver, it is possible to check the normal driving state of the AVN monitor 110 with a LOW level (0V) output, and a HIGH level (3.3V) output if in a normal state.

The features of the present invention described above with reference to FIGS. 1 to 3 are summarized as follows.

First, the head unit 130 located outside the AVN monitor 110 acquires an internal control signal of the AVN monitor 110 and determines whether the AVN monitor 110 is operating normally.

Second, the head unit 130 determines whether the AVN monitor 110 is operating normally by using the control signal (GSP signal) of the gate driver mounted inside the AVN monitor 110 as a vertical synchronization signal.

Third, the head unit 130 determines whether the AVN monitor 110 is operating normally by calculating the time between the first GSP indicating the first line of the vertical synchronization signal and the second GSP of the next frame (field).

Fourth, the head unit 130 determines whether the AVN monitor 110 is operating normally by checking the number of horizontal synchronization signals (GSC signals or GOE signals) between the first GSP and the second GSP. Since the count value of the horizontal sync signal between the 1st GSP and the 2nd GSP must always be counted, if it is not a fixed number, there is a horizontal sync signal problem due to the LCD external video signal or the LCD internal timing controller or other causes. can judge

Fifth, a monitoring signal may be separately provided on the LCD internal timing controller, and the above configuration may be implemented by allocating a separate port to the LCD Source Driver IC. In addition, the above configuration can be implemented by monitoring the transmission signal between the source driver ICs.

An embodiment of the present invention has been described above with reference to FIGS. 1 to 3 . Hereinafter, a preferred embodiment of the present invention that can be inferred from such one embodiment will be described.

4 is a conceptual diagram of a display control apparatus for a vehicle according to a preferred embodiment of the present invention.

According to FIG. 4 , the vehicle display control apparatus 400 includes a normal operation determination unit 410 , a display apparatus control unit 420 , a power supply unit 430 , and a main control unit 440 .

The power supply unit 430 performs a function of supplying power to each component constituting the vehicle display control apparatus 400 . The main control unit 440 performs a function of controlling the overall operation of each component constituting the vehicle display control apparatus 400 . In consideration of that the vehicle display control device 400 may be implemented as a head unit mounted on a vehicle, the power supply unit 430 and the main control unit 440 may not be provided in the present embodiment.

The normal operation determining unit 410 performs a function of determining whether the display device mounted on the vehicle operates normally based on the number of second signals input between the first signals input at predetermined time intervals.

According to an embodiment of the present invention, a gate output enable (GOE) signal or a gate shift clock (GSC) signal is counted between the first GSP (Gate Start Pulse) signal and the second GSP signal input thereafter. When determining whether to operate, the first signals are concepts corresponding to the first GSP signal and the second GSP signal, and the second signal is a concept corresponding to the GOE signal or the GSC signal.

The normal operation determination unit 410 may determine whether the display apparatus operates normally by comparing the number of second signals with the reference number. In this case, the normal operation determining unit 410 determines that the display apparatus operates normally when it is determined that the number of second signals is less than or equal to the reference number, and when it is determined that the number of second signals exceeds the reference number, the display apparatus does not operate normally. can be judged not to be.

The normal operation determination unit 410 may use the vertical synchronization signal as the first signals and the horizontal synchronization signal as the second signals.

When it is determined by the normal operation determination unit 410 that the display apparatus does not operate normally, the display apparatus controller 420 controls the display apparatus to operate normally.

The display device controller 420 may control the display device to operate normally by resetting the display device or re-applying power to the display device.

The vehicle display control apparatus 400 may further include a reference number determiner 450 .

The normal operation determination unit 410 may use the reference number when determining whether the display apparatus operates normally. The reference number determiner 450 determines the reference number based on the resolution value of the display device.

The reference number determiner 410 may use a vertical resolution value as a resolution value of the display device.

The reference number determiner 410 may use the first resolution value and the second resolution value obtained based on the resolution value of the display device when determining the reference number. In this case, the reference number determiner 410 may determine a value greater than the first resolution value and smaller than the second resolution value as the reference number. Also, the reference number determiner 410 may use a first multiple of the resolution value as the first resolution value, and use a second multiple that is larger than the first multiple as the second resolution value. The reference number determiner 410 may use 1 times as the first multiple and 1.2 times as the second multiple.

Meanwhile, the normal operation determining unit 410 may determine whether the display apparatus operates normally based on the time difference between the first signals.

The normal operation determination unit 410 may determine whether the display device operates normally by determining whether the time difference between the first signals is within a reference time difference range (eg, 16.7ms - α to 16.7ms + α). . When it is determined that the time difference between the first signals is within the reference time difference range (ie, 16.7ms - α ≤ the time difference between the first signals ≤ 16.7ms + α), the normal operation determination unit 410 determines that the display device operates normally. If it is determined that the time difference between the first signals is not within the reference time difference range (ie, the time difference between the first signals < 16.7 ms - α, the time difference between the first signals > 16.7 ms + α), a display It may be determined that the device does not operate normally.

When the normal operation determination unit 410 cannot determine whether the display apparatus operates normally based on the number of second signals, it may determine whether the display apparatus operates normally based on the time difference between the first signals. have. A method of determining whether a display device mounted on a vehicle operates normally based on the number of second signals input between first signals input at predetermined times is referred to as a first condition, and Assuming that the method of determining whether the display apparatus normally operates based on the time difference is referred to as a second condition, the normal operation determination unit 410 applies the second condition when it cannot determine whether the display apparatus operates normally under the first condition. It can be used to determine whether the display apparatus is operating normally. However, the present embodiment is not limited thereto, and the normal operation determining unit 410 may determine whether the display apparatus operates normally by using the first condition and the second condition at the same time. In this case, the normal operation determination unit 410 may determine that the display apparatus operates normally if both the first condition and the second condition are satisfied or any one of the first condition and the second condition is satisfied.

Meanwhile, the vehicle display control apparatus 400 may further include a determination information obtaining unit 460 .

The determination information obtaining unit 460 performs a function of measuring the number of second signals input between the first signals. The determination information obtaining unit 460 may also perform a function of measuring a time difference between the first signals.

Next, a method of operating the display control apparatus 400 for a vehicle will be described. 5 is a flowchart schematically illustrating a method for controlling a display for a vehicle according to a preferred embodiment of the present invention.

First, the determination information obtaining unit 460 measures the number of input second signals between the first signals input at a predetermined time ( S510 ).

Thereafter, the normal operation determining unit 410 determines whether the display device mounted on the vehicle operates normally based on the number of second signals ( S520 ). The normal operation determination unit 410 may determine whether the display apparatus operates normally by comparing the number of second signals with the reference number.

When it is determined by the normal operation determination unit 410 that the display apparatus does not operate normally, the display apparatus controller 420 controls the display apparatus to operate normally ( S530 ).

Meanwhile, before step S510, the reference number determiner 450 may determine the reference number based on the resolution value of the display device.

Even if all the components constituting the embodiment of the present invention described above are described as being combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, although all of the components may be implemented as one independent hardware, some or all of the components are selectively combined to perform some or all functions of the combined components in one or a plurality of hardware program modules It may be implemented as a computer program having In addition, such a computer program is stored in a computer readable media such as a USB memory, a CD disk, a flash memory, etc., read and executed by the computer, thereby implementing the embodiment of the present invention. The computer program recording medium may include a magnetic recording medium, an optical recording medium, a carrier wave medium, and the like.

In addition, all terms including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined in the detailed description. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes and substitutions are possible within the scope that does not depart from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are for explanation rather than limiting the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (10)

a normal operation determination unit that determines whether a display device mounted on a vehicle operates normally based on the number of second signals input between first signals input at predetermined times; and
When it is determined that the display device does not operate normally, the display device controller controls the display device to operate normally.
including,
The normal operation determination unit uses a gate start pulse (GSP) signal, which is a signal related to a vertical sync signal, as the first signal, and a gate shift clock (GSC) and a gate (GOE) signal, which is a signal related to a horizontal sync signal, as the second signal. Output Enable) using one of the signals,
The normal operation determining unit determines that the display apparatus operates normally when the number of second signals is less than or equal to a reference number, and determines that the display apparatus does not operate normally when the number of second signals exceeds the reference number do,
A reference number determiner configured to determine the reference number based on a vertical resolution value of the display device
further comprising,
The reference number determining unit determines a value greater than a first resolution value and smaller than a second resolution value as the reference number,
The reference number determiner uses a first multiple of the vertical resolution value of the display device as the first resolution value and uses a second multiple of the vertical resolution value of the display device as the second resolution value display control unit. delete delete delete delete delete delete The method of claim 1,
and the normal operation determining unit determines whether the display apparatus operates normally based on a time difference between the first signals. The method of claim 1,
and the display device controller controls the display device to operate normally by resetting the display device or re-applying power to the display device. determining whether a display device mounted on a vehicle operates normally based on the number of second signals input between first signals input at predetermined time intervals; and
controlling the display device to operate normally when it is determined that the display device does not operate normally
including,
The determining step is
A gate start pulse (GSP) signal, which is a signal related to a vertical sync signal, is used as the first signal, and a gate shift clock (GSC) signal and a gate output enable (GOE) signal, which is a signal related to a horizontal sync signal, is used as the second signal. use one,
The determining step is
If the number of second signals is less than or equal to a reference number, it is determined that the display device operates normally, and when the number of second signals exceeds the reference number, it is determined that the display device does not operate normally,
Prior to the judging step,
determining the reference number based on a vertical resolution value of the display device;
further comprising,
The determining step is
determining a value greater than the first resolution value and smaller than the second resolution value as the reference number;
The determining step is
A vehicle display control method, characterized in that a first multiple of the vertical resolution value of the display device is used as the first resolution value, and a second multiple of the vertical resolution value of the display device is used as the second resolution value.

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