CN114373410B - Abnormality detection method, abnormality detection device and display device - Google Patents
Abnormality detection method, abnormality detection device and display device Download PDFInfo
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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Abstract
The invention discloses an abnormality detection method, an abnormality detection device and a display device, wherein the abnormality detection method can be applied to the abnormality detection process of a display panel of the display device, a control main board of the display device can directly acquire an abnormality detection signal transmitted by a drive chip of the display panel, and can directly determine an abnormality type according to the abnormality detection signal, so that the problem that in the prior art, when the control main board receives the abnormality signal, a register in the drive chip needs to be read again to judge a specific error type is avoided.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to an abnormality detection method, an abnormality detection device and a display device.
Background
In the display device, the display driver chip has an abnormality detection function based on safety, and the abnormality information is generally notified to the control main board through a hardware pin (fail_det). If the error is abnormal, the control main board reads the register in the driving chip again, and judges the specific error type. The FAIL_DET signal can only indicate whether an exception occurs, and a specific exception type can be confirmed only by reading a register in the driver chip, so that the procedure for confirming the exception type is complex.
Disclosure of Invention
The invention provides an abnormality detection method, an abnormality detection device and a display device, which are applied to the abnormality detection process of a display panel of the display device, wherein an abnormality detection signal transmitted by a display panel driving chip is directly obtained through a control main board of the display device, and an abnormality type can be directly determined according to the abnormality detection signal.
In a first aspect, an embodiment of the present invention provides an anomaly detection method, which is applied to an anomaly detection process of a display panel of a display device;
The display device comprises a control main board, the display panel comprises a driving chip, the driving chip comprises an abnormality detection signal output end, the control main board comprises an abnormality detection signal receiving end, and the abnormality detection signal output end is electrically connected with the abnormality detection signal receiving end; the abnormality detection method comprises the following steps:
Acquiring an abnormality detection signal;
and determining the abnormality type according to the abnormality detection signal.
In a second aspect, an embodiment of the present invention further provides an abnormality detection device, disposed in a control motherboard of the display device, where the abnormality detection device includes:
The abnormality detection signal acquisition module is used for acquiring an abnormality detection signal;
And the abnormality type determining module is used for determining the abnormality type according to the abnormality detection signal.
In a third aspect, an embodiment of the present invention further provides a display device, including a display panel and a control motherboard, where the display panel includes a driving chip, the driving chip includes an anomaly detection signal output end, and the control motherboard includes an anomaly detection signal receiving end, and the anomaly detection signal output end is electrically connected with the anomaly detection signal receiving end;
the control main board is used for executing the abnormality detection method provided in the first aspect.
According to the abnormality detection method provided by the embodiment of the invention, the control main board can directly acquire the abnormality detection signal transmitted by the driving chip, the abnormality type can be determined directly according to the abnormality detection signal, and the problem that in the prior art, when the control main board receives the abnormality signal, a register in the driving chip needs to be read again to judge a specific error type is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 2 is a flowchart of an anomaly detection method according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating another abnormality detection method according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating another abnormality detection method according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating another abnormality detection method according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating another abnormality detection method according to an embodiment of the present invention;
FIG. 7 is a flowchart of another abnormality detection method according to an embodiment of the present invention;
Fig. 8 is a schematic structural diagram of an abnormality detection apparatus according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the prior art, the exception information is typically notified to the control motherboard via a hardware pin (FAIL_DET). If the error occurs, the control main board reads the register in the driving chip again, and judges the specific error type, wherein the FAIL_DET signal only indicates whether the error occurs or not, and the specific error type can be confirmed only by reading the register in the driving chip. The detection method has the following problems: the detection efficiency is low; if the communication interfaces of the driving chip and the control main board have problems (such as ESD or other interference influences), the control main board cannot acquire the abnormal error type in time; some client platforms do not support the reading and writing of the driver chip registers, and great trouble is brought to the analysis of abnormal types.
Based on the technical problems, the inventor further researches the technical scheme of the embodiment of the invention. Specifically, the embodiment of the invention provides an abnormality detection method, which is applied to an abnormality detection process of a display panel of a display device; the display device comprises a control main board, the display panel comprises a driving chip, the driving chip comprises an abnormality detection signal output end, the control main board comprises an abnormality detection signal receiving end, and the abnormality detection signal output end is electrically connected with the abnormality detection signal receiving end; the abnormality detection method comprises the following steps:
Acquiring an abnormality detection signal;
and determining the abnormality type according to the abnormality detection signal.
By adopting the technical scheme, the abnormal detection signal transmitted by the driving chip of the display panel is directly obtained through the control main board of the display device, and the abnormal type can be directly determined according to the abnormal detection signal.
The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention; fig. 2 is a flowchart of an anomaly detection method according to an embodiment of the present invention. Referring to fig. 1 and 2, an embodiment of the present invention provides an anomaly detection method applied to an anomaly detection process of a display panel 200 of a display device 100, wherein the display device 100 includes a control motherboard 101, the display panel 200 includes a driving chip 201, the driving chip 201 includes an anomaly detection signal output end 202, the control motherboard 101 includes an anomaly detection signal receiving end 102, and the anomaly detection signal output end 202 is electrically connected with the anomaly detection signal receiving end 102.
The display panel 200 includes a display area AA for image display; the control motherboard 101 may receive and process the abnormality detection signal of the display panel 200 obtained by the abnormality detection signal receiving terminal 102. The anomaly detection signal output terminal 202 is electrically connected to the anomaly detection signal receiving terminal 201, and transmits the anomaly detection signal and other signals of the display panel 200. The number of the anomaly detection signal output terminals 202 and the anomaly detection signal receiving terminals 102 is not particularly limited, and can be set according to actual needs, and the anomaly detection signals transmitted by the plurality of anomaly detection signal output terminals 202 and the anomaly detection signal receiving terminals 102 can be the same or different, and can be transmitted in a time-sharing or synchronous manner.
It should be noted that there are various signal connections between the control motherboard 101 and the driving chip 201 for transmitting display signals and control signals, which are not shown here, and those skilled in the art will understand based on the embodiments of the present invention.
The abnormality detection method provided by the embodiment of the invention comprises the following steps:
S101, acquiring an abnormality detection signal.
Specifically, as shown in fig. 1 and fig. 2, the abnormality detection method provided in the embodiment of the present invention may be applied to abnormality detection of a display panel of a display device for vehicle-mounted display, where a microprocessor in a control motherboard 101 of the display device may be used to execute the abnormality detection method provided in the embodiment of the present invention, and a driver chip 201 transmits an abnormality detection signal to the control motherboard 101 through an abnormality detection signal output end 202, and the control motherboard 101 obtains the abnormality detection signal through an abnormality detection signal receiving end 102. The abnormality detection signal includes at least one of voltage, current, level and frequency.
S102, determining the abnormality type according to the abnormality detection signal.
Specifically, the control main board 101 determines the abnormal type of the display panel 200 in the display device 100 according to the obtained abnormal detection signal and in combination with the corresponding relation between the stored abnormal detection signal and the abnormal type, and can display the abnormal type, flash an alarm indicator lamp or prompt an abnormal alarm sound through the display panel 200, so as to be convenient for a user to check.
In summary, the abnormality detection method provided by the embodiment of the invention can directly obtain the abnormality detection signal transmitted by the driving chip by the control main board, can directly determine the abnormality type according to the abnormality detection signal, and avoids the problem that in the prior art, when the control main board receives the abnormality signal, the register in the driving chip needs to be read again to judge the specific error type.
Next, a specific arrangement mode of the abnormality detection signal will be described.
First, an example in which the abnormality detection signal includes a voltage detection signal is described.
Optionally, the anomaly detection signal includes a voltage detection signal, and fig. 3 is a schematic flow chart of another anomaly detection method according to an embodiment of the present invention. Referring to fig. 1 and 3, an anomaly detection method provided in an embodiment of the present invention includes:
S201, acquiring a voltage detection signal.
With continued reference to fig. 1 and 3, the control motherboard 101 receives a voltage detection signal of the display panel 200 through the anomaly detection signal receiving terminal 102, wherein the voltage detection signal includes a voltage value.
S202, determining an abnormal type according to the voltage detection signal, wherein the voltage values of any two abnormal types are different.
Specifically, as shown in fig. 1 and 3, the control motherboard 101 determines the abnormal type of the display panel 200 in the display device 100 according to the obtained voltage value of the voltage detection signal and the corresponding relationship between the stored voltage detection signal and the abnormal type. The voltage values of any two abnormal types are different, so that each voltage detection signal corresponds to one abnormal type respectively, and the abnormal type can be directly determined according to the obtained voltage detection signals.
Optionally, the anomaly type includes at least one of an anomaly power-off anomaly, an image cyclic redundancy check value mismatch anomaly, a low voltage differential signal shut-down anomaly, and an overheat detection anomaly.
For example, the voltage detection signal is 1.0V, and the corresponding abnormality type is abnormal power failure abnormality; the voltage detection signal is 1.5V, and the corresponding anomaly type is that the image cyclic redundancy check value is not matched with the anomaly; the voltage detection signal is 2.0V, and the corresponding abnormality type is low-voltage differential signal closing abnormality; the voltage detection signal is 2.5V, the corresponding abnormality type is overheat detection abnormality, and the like, and the correspondence between more voltage detection signals and abnormality types is not listed here.
In summary, by adopting the anomaly detection method provided by the embodiment of the invention, the voltage anomaly signal corresponds to the anomaly type, the control main board can directly acquire the anomaly detection signal transmitted by the driving chip, the anomaly type can be determined directly according to the anomaly detection signal, the anomaly type determination is accurate in time and has few steps, the anomaly detection method is not influenced by the interference of the communication interface problems of the driving chip and the control main board, and the problem that the reading and writing of the driving signal register are not supported by some client platforms to cause great trouble to the anomaly type analysis is avoided.
The abnormality detection signal includes a voltage detection signal and a frequency detection signal.
Optionally, the anomaly detection signal includes a voltage detection signal and a frequency detection signal, and fig. 4 is a flow chart of another anomaly detection method according to an embodiment of the present invention. Referring to fig. 1 and fig. 4, another anomaly detection method provided in an embodiment of the present invention includes:
S301, acquiring a voltage detection signal and a frequency detection signal.
With continued reference to fig. 1, the control motherboard 101 receives a voltage detection signal and a frequency detection signal of the display panel 200 through the anomaly detection signal receiving terminal 102, wherein the voltage detection signal includes a voltage value and the frequency detection signal includes a frequency value.
S302, determining an abnormal type according to the voltage detection signal and the frequency detection signal, wherein the voltage values of any two abnormal types are different and/or the frequency values are different.
Specifically, as shown in fig. 1 and fig. 4, the control motherboard 101 determines the abnormal type of the display panel 200 in the display device 100 according to the obtained voltage detection signal and frequency detection signal and in combination with the corresponding relationship between the stored voltage detection signal, frequency detection signal and abnormal type, and adopts the combination of the voltage detection signal and frequency detection signal to correspond the voltage detection signal and the frequency detection signal to the abnormal type, so as to increase the number of abnormal type detections and the accuracy of the abnormal detection data and the abnormal type. The voltage values of any two abnormal types are different, or the frequency values of any two abnormal types are different, or the voltage values and the frequency values of any two abnormal types are different, so that each detection signal formed by the voltage detection signal and the frequency detection signal corresponds to one abnormal type respectively.
For example, the voltage detection signal is 1.0V, the frequency detection signal is 40Hz, and the corresponding abnormality type is abnormal power failure abnormality; the voltage detection signal is 1.5V, the frequency detection signal is 40Hz, and the corresponding anomaly type is that the image cyclic redundancy check value is not matched with the anomaly;
Or the voltage detection signal is 1.0V, the frequency detection signal is 60Hz, and the corresponding abnormal type is abnormal power-off abnormality; the voltage detection signal is 1.0V, the frequency detection signal is 40Hz, and the corresponding anomaly type is that the image cyclic redundancy check value is not matched with the anomaly;
Or the voltage detection signal is 1.0V, the frequency detection signal is 40Hz, and the corresponding abnormal type is abnormal power-off abnormality; the voltage detection signal is 1.5V, the frequency detection signal is 60Hz, and the corresponding anomaly type is that the image cyclic redundancy check value is not matched with the anomaly. The correspondence between more voltage detection signals and frequency detection signals and anomaly types is not further described herein.
In summary, by setting the anomaly detection signal to include the voltage detection signal, different anomaly types are represented by different voltage detection signals, and anomaly detection is timely and accurate. Or the abnormality detection signal comprises a composite signal of the voltage detection signal and the frequency detection signal, different abnormality types are represented by different voltage detection signals and/or frequency detection signals, and the abnormality detection is timely and accurate; in addition, different abnormal types can be represented through different representation of the voltage detection signals and/or the frequency detection signals, so that more abnormal types can be represented, the abnormal detection range is improved, and the abnormal detection accuracy is improved.
The above-described embodiments are described with respect to detecting only one abnormality type, and a description will be given next of how two or more abnormality types should be simultaneously occurred.
Optionally, the anomaly detection signal includes a first anomaly detection signal and a second anomaly detection signal, where the first anomaly detection signal and the second anomaly detection signal are different, and fig. 5 is a flow chart of another anomaly detection method according to an embodiment of the present invention. Referring to fig. 1 and 5, another anomaly detection method provided in an embodiment of the present invention includes:
s401, sequentially acquiring a first abnormality detection signal and a second abnormality detection signal.
Specifically, referring to fig. 1 and 5, the driving chip 201 transmits the first abnormality detection signal and the second abnormality detection signal to the control main board 101 through the abnormality detection signal output terminal 202, and the control main board 101 sequentially acquires the first abnormality detection signal and the second abnormality detection signal through the abnormality detection signal receiving terminal 102. For example, the first abnormality detection signal is a voltage signal of 1.0V, and the second abnormality detection signal is a voltage signal of 2.0V.
S402, confirming a first abnormality type according to the first abnormality detection signal, and confirming a second abnormality type according to the second abnormality detection signal, wherein the first abnormality type is different from the second abnormality type.
Specifically, as shown in fig. 1 and fig. 5, the control main board 101 determines, according to the obtained first abnormality detection signal, that the abnormality type of the display panel in the display device 100 is abnormal power failure abnormality in combination with the stored correspondence between the abnormality detection signal and the abnormality type; and then determining that the abnormal type of the display panel in the display device 100 is an image cyclic redundancy check value mismatch abnormality according to the obtained second abnormal detection signal and by combining the corresponding relation between the stored abnormal detection signal and the abnormal type. When the number of the abnormality detection signals exceeds two, the control main board sequentially acquires the abnormality detection signals and sequentially determines the abnormality type according to the abnormality detection signals.
Based on the above embodiments, fig. 6 is a flowchart of another anomaly detection method according to an embodiment of the present invention. Referring to fig. 1 and 6, another anomaly detection method provided in an embodiment of the present invention includes:
S501, establishing a corresponding relation between the abnormality detection signal and the abnormality type.
Specifically, the abnormality detection signal output end of the driving chip outputs a voltage signal, the voltage signal amplitude of the abnormality detection signal output end is directly measured by using an oscilloscope or a universal meter, the abnormality type of the display panel corresponding to the voltage signal amplitude is established, the corresponding relation between the abnormality detection signal and the abnormality type is determined, a database of the corresponding relation between the abnormality detection signal and the abnormality type is established through multiple times of confirmation of the voltage signal amplitude and the abnormality type, and the database is stored in a microprocessor of a control main board in a program coding mode so as to control the calling of a main board program.
S502, acquiring an abnormality detection signal.
S503, confirming the abnormal type according to the corresponding relation between the abnormal detection signal and the abnormal type and the abnormal detection signal.
Specifically, as shown in fig. 1 and 6, the control motherboard 101 invokes a correspondence between the stored abnormality detection signal and the abnormality type, compares the magnitudes of the obtained abnormality detection signal and the stored abnormality detection signal, and determines that the abnormality type of the obtained abnormality detection signal is the same as the abnormality type corresponding to the stored abnormality detection signal when the magnitude difference between the obtained abnormality detection signal and the stored abnormality detection signal is within a preset difference range.
Step S504, updating the corresponding relation between the abnormality detection signal and the abnormality type.
Specifically, as shown in fig. 1 and fig. 6, when the display device 100 is used for a period of time, the abnormality detection signal and the abnormality type may change, so that the abnormality detection signal output by the abnormality detection signal output end 102 of the driving chip 201 may be collected at regular time, the corresponding abnormality type may be determined, the correspondence between the abnormality detection signal stored in the control motherboard 101 and the abnormality type may be updated, and the accuracy of abnormality type detection may be ensured.
Based on the above embodiments, fig. 7 is a flowchart of another abnormality detection method according to an embodiment of the present invention. Referring to fig. 1 and 7, another anomaly detection method provided in an embodiment of the present invention includes:
s601, acquiring an abnormality detection signal.
S602, determining the abnormality type according to the abnormality detection signal.
S603, restarting the control driving chip.
Specifically, when the control motherboard determines that the display panel has an abnormal type, the control motherboard may control the driving chip of the display panel to restart according to a preset restart program, so as to eliminate the abnormality of the display panel.
Based on the same inventive concept, the embodiment of the invention also provides an abnormality detection device, which is disposed in a control motherboard of the display device and is used for executing the abnormality detection method provided in the above embodiment. Fig. 8 is a schematic structural diagram of an abnormality detection apparatus according to an embodiment of the present invention. As shown in fig. 7, the abnormality detection device 10 includes:
The abnormality detection signal acquisition module 11 is configured to acquire an abnormality detection signal.
An anomaly type determination module 12 for determining an anomaly type based on the anomaly detection signal.
The abnormality detection device provided by the embodiment of the invention can be used for executing the abnormality detection method provided by the embodiment, the control main board can directly acquire the abnormality detection signal transmitted by the driving chip and can directly determine the abnormality type according to the abnormality detection signal, so that the problem that in the prior art, when the control main board receives the abnormality signal, a register in the driving chip needs to be read again to judge a specific error type is avoided.
The abnormality detection device also has the advantages of the abnormality detection method in the above embodiment, and the same points can be understood with reference to the explanation of the abnormality detection method, and will not be described in detail.
Based on the same inventive concept, the embodiment of the invention also provides a display device. With continued reference to fig. 1, the display device 100 includes a display panel 200 and a control main board 101, the display panel 200 includes a driving chip 201, the driving chip 201 includes an anomaly detection signal output end 202, the control main board 101 includes an anomaly detection signal receiving end 102, the anomaly detection signal output end 102 is electrically connected to the anomaly detection signal output end 202, and the control main board 101 is configured to execute the anomaly detection method provided in the above embodiment. The display device 100 provided in the embodiment of the present invention may be a display screen of a vehicle-mounted display control motherboard, or may be any electronic product with a display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, industrial control equipment, medical display screen, touch interactive terminal, etc., which is not particularly limited by the embodiment of the invention. The display device also has the advantages of the abnormality detection method in the above embodiment, and the same points can be understood with reference to the explanation of the abnormality detection method, which is not described in detail below.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. An abnormality detection method is applied to an abnormality detection process of a display panel of a display device;
The display device comprises a control main board, the display panel comprises a driving chip, the driving chip comprises an abnormality detection signal output end, the control main board comprises an abnormality detection signal receiving end, and the abnormality detection signal output end is electrically connected with the abnormality detection signal receiving end; the abnormality detection method is characterized by comprising the following steps:
Acquiring an abnormality detection signal;
and determining the abnormality type according to the abnormality detection signal.
2. The abnormality detection method according to claim 1, characterized in that the abnormality detection signal includes a voltage detection signal;
Determining an anomaly type according to the anomaly detection signal, including:
and determining the abnormal type according to the voltage detection signal, wherein the voltage values of any two abnormal types are different.
3. The abnormality detection method according to claim 1, characterized in that the abnormality detection signal includes a voltage detection signal and a frequency detection signal;
Determining an anomaly type according to the anomaly detection signal, including:
And determining the abnormal type according to the voltage detection signal and the frequency detection signal, wherein the voltage value and/or the frequency value of any two abnormal types are different.
4. The abnormality detection method according to claim 1, characterized in that the abnormality detection signal includes a first abnormality detection signal and a second abnormality detection signal, the first abnormality detection signal and the second abnormality detection signal being different;
Acquiring an abnormality detection signal, comprising:
sequentially acquiring the first abnormality detection signal and the second abnormality detection signal;
Determining an anomaly type according to the anomaly detection signal, including:
confirming a first abnormality type according to the first abnormality detection signal, and confirming a second abnormality type according to the second abnormality detection signal, wherein the first abnormality type is different from the second abnormality type.
5. The abnormality detection method according to claim 1, characterized by further comprising, before determining an abnormality type from the abnormality detection signal:
establishing a corresponding relation between the abnormality detection signal and the abnormality type;
Determining an anomaly type according to the anomaly detection signal, including:
and confirming the abnormal type according to the corresponding relation between the abnormal detection signal and the abnormal type and the abnormal detection signal.
6. The abnormality detection method according to claim 5, characterized by further comprising, after determining an abnormality type from the abnormality detection signal:
updating the corresponding relation between the abnormality detection signal and the abnormality type.
7. The abnormality detection method according to claim 1, characterized by further comprising, after determining an abnormality type from the abnormality detection signal:
And controlling the restarting of the driving chip.
8. The anomaly detection method of claim 1, wherein the anomaly type comprises at least one of an anomaly power-off anomaly, an image cyclic redundancy check value mismatch anomaly, a low voltage differential signal shut-down anomaly, and an overheat detection anomaly.
9. The display device is characterized by comprising a display panel and a control main board, wherein the display panel comprises a driving chip, the driving chip comprises an abnormality detection signal output end, the control main board comprises an abnormality detection signal receiving end, and the abnormality detection signal output end is electrically connected with the abnormality detection signal receiving end;
The control motherboard is configured to execute the anomaly detection method of any one of claims 1-8.
10. The abnormality detection device provided in the control main board of the display device according to claim 9, comprising:
The abnormality detection signal acquisition module is used for acquiring an abnormality detection signal;
And the abnormality type determining module is used for determining the abnormality type according to the abnormality detection signal.
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