CN114373412B - Display device and abnormality detection method thereof - Google Patents
Display device and abnormality detection method thereof Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 194
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- 238000004891 communication Methods 0.000 description 4
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- 230000008054 signal transmission Effects 0.000 description 3
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2218/00—Aspects of pattern recognition specially adapted for signal processing
- G06F2218/08—Feature extraction
- G06F2218/10—Feature extraction by analysing the shape of a waveform, e.g. extracting parameters relating to peaks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2218/00—Aspects of pattern recognition specially adapted for signal processing
- G06F2218/12—Classification; Matching
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Abstract
The invention discloses a display device and an abnormality detection method thereof, wherein the display device comprises: a display panel and a driving circuit; the driving circuit is electrically connected with the display panel; the driving circuit includes an abnormality detection unit; the abnormality detection unit is used for receiving abnormality information; the output signal of the abnormality detection unit includes waveforms showing at least two kinds of abnormality information. According to the technical scheme provided by the invention, waveforms capable of displaying different abnormal information are output when different abnormal information appears in the driving circuit, so that specific abnormal information can be obtained only by the waveforms outside, and the abnormal detection efficiency and accuracy are improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device and an anomaly detection method thereof.
Background
Based on safety, the vehicle-mounted display driver ICs have an abnormality detection function, and the types of errors detected include voltage abnormality, input display signal abnormality (LVDS signal), touch signal abnormality, and the like. The abnormality information is typically outputted to the instruction information notifying system through one pin. If the error occurs, the system reads the register in the IC again and judges the specific error type.
However, the indication information output by the driving IC at present only indicates whether an abnormality occurs, and the specific abnormality type also needs to read the internal register of the driving IC, so that the abnormality detection efficiency is low.
Disclosure of Invention
The embodiment of the invention provides a display device and an abnormality detection method thereof, which are used for improving the abnormality detection efficiency and the accuracy.
In a first aspect, an embodiment of the present invention provides a display apparatus, including: a display panel and a driving circuit; the driving circuit is electrically connected with the display panel;
The driving circuit includes an abnormality detection unit; the abnormality detection unit is used for receiving abnormality information;
the output signal of the abnormality detection unit includes waveforms showing at least two kinds of abnormality information.
In a second aspect, an embodiment of the present invention provides an anomaly detection method for a display device, which is applicable to the display device provided in any embodiment of the present invention, including:
The abnormality detection unit receives abnormality information;
the abnormality detection unit outputs waveforms showing at least two kinds of abnormality information.
In the invention, the display device comprises a display panel and a driving circuit for driving the display panel, wherein the driving circuit has an abnormality detection function and can generate abnormality information, the driving circuit also comprises an abnormality detection unit, the abnormality detection unit can output signals according to the abnormality information so as to indicate the generation of abnormality, and the output signals of the abnormality detection unit comprise waveforms capable of displaying at least two types of abnormality information.
Drawings
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a driving circuit according to an embodiment of the present invention;
FIG. 4 is a waveform diagram of an indication signal in an abnormal situation according to an embodiment of the present invention;
FIG. 5 is a waveform diagram of an indication signal in another abnormal situation according to an embodiment of the present invention;
FIG. 6 is a waveform diagram of an indication signal in another abnormal situation according to an embodiment of the present invention;
fig. 7 is a schematic diagram of another driving circuit according to an embodiment of the present invention;
fig. 8 is a flowchart of a method for detecting an abnormality of a display device according to an embodiment of the present invention;
fig. 9 is a flowchart of another abnormality detection method of a display device 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 self-checking function of the driving circuit can only detect whether the signals of the driving circuit are abnormal or not. Specifically, whether or not the above-described abnormality occurs is notified to the system of the display device, and the means for notifying the abnormality is a level indication, a frequency indication, a combination of a level indication and a frequency indication, or the like. Specifically, if the level indication means is used, whether an abnormality occurs is identified by outputting a high level or a low level, for example, the driving circuit outputs a high level to prove that an abnormality occurs, and the driving circuit outputs a low level to prove that no abnormality occurs; if the frequency indication means is adopted, whether abnormality occurs is indicated by outputting a periodic signal, for example, a 60Hz signal is output by a normal condition driving circuit, and a 40Hz signal is output by an abnormal condition driving circuit; if the level indication and the frequency indication means are combined, the difference of the output signals of the driving circuit is larger under the normal condition and the abnormal condition. However, in the above prior art, the driving circuit can only notify whether the signal in the driving circuit is abnormal, and cannot lock the specific abnormal situation, for example, if the signal for detecting the occurrence of the abnormality is specific, it is necessary to further communicate with the register of the driving circuit, and the abnormality checking efficiency is low.
An embodiment of the present invention provides a display device including: a display panel and a driving circuit; the driving circuit is electrically connected with the display panel;
The driving circuit includes an abnormality detection unit; the abnormality detection unit is used for receiving the abnormality information;
the output signal of the abnormality detection unit includes waveforms showing at least two kinds of abnormality information.
In the embodiment of the invention, the display device comprises a display panel and a driving circuit for driving the display panel, wherein the driving circuit has an abnormality detection function and can generate abnormality information, the driving circuit also comprises an abnormality detection unit, the abnormality detection unit can output signals according to the abnormality information so as to indicate the generation of abnormality, and the output signals of the abnormality detection unit comprise waveforms capable of displaying at least two types of abnormality information.
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, and as shown in fig. 1, the display device may include a display panel 11 and a driving circuit 12; the driving circuit 12 is electrically connected to the display panel 11 to drive the sub-pixels 13 in the display area AA of the display panel 11, so that the sub-pixels 13 in the display area AA of the display panel perform image display. As shown in fig. 1, the driving circuit 12 can provide data signals for each sub-pixel 13 in the display area AA through the data line 14, and provide control signals, such as clock signals, power signals, trigger signals, etc., for the gate driving circuit 15, so that the gate driving circuit 14 provides scan signals for the sub-pixels 13 through the scan line 16.
Optionally, for safety reasons, the driving circuit 12 in this embodiment has an abnormality detection function for self-checking the signal output from the driving circuit 12 to the display panel 11, if the module self-checking discovery signal of the driving circuit 12 is wrong, the abnormality detection unit 121 sends abnormality information to the driving circuit 12, and the output signal of the abnormality detection unit 121 notifies the system or external device of the information error.
In the present embodiment, the abnormality information is an abnormality detection signal in which a signal input to the display panel 11 by the driving circuit 12 is erroneous. The anomaly information generated by the error of different signals is different. In this embodiment, the output signal of the anomaly detection unit 121 includes waveforms capable of displaying at least two types of anomaly information, and when the anomaly detection unit 121 receives one type of anomaly information, the output waveform is different from the output waveform when the anomaly detection unit 121 receives another type of anomaly information, so that the system or external device of the display device can distinguish the anomaly information corresponding to the waveforms through the difference of the waveforms of the output signals of the anomaly detection unit 121, the acquisition of the anomaly information can be completed only by one step, the acquisition of the anomaly information does not need to be read again for the acquisition of the anomaly information by the internal register of the driving circuit, the anomaly detection efficiency is effectively improved, and in this embodiment, an accurate correspondence exists between the waveform of the output signal of the anomaly detection unit 121 and the anomaly information, and the type of anomaly information can be quickly locked according to the waveform, so that the accuracy of anomaly detection is improved.
With continued reference to fig. 1, alternatively, in this embodiment, the driving circuit 12 may be integrated with a driving Chip and bound to the non-display area NA of the display panel, to form a packaging process of a Chip On Glass (COG), and the abnormality detecting unit 121 sends the output signal to a system or an external device of the display device through the flexible circuit board 171. The external device may be a device such as an oscilloscope or a waveform analyzer that can acquire the waveform shape so as to distinguish the output signal of the abnormality detection unit 121 according to the waveform.
Fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention, alternatively, in this embodiment, the driving circuit 12 may be integrated in a driving Chip and placed in a flexible circuit board 172 flat cable to form a packaging process of a Chip On Film (COF), and then turned over to a backlight side of the display panel by utilizing characteristics of the flexible circuit board 172, and the setting process of the driving circuit 12 shown in fig. 2 is beneficial to design a narrow frame of the display device and promote display effects. The abnormality detection unit 121 transmits the output signal to a system of the display device or an external device through the connector 18.
Fig. 3 is a schematic structural diagram of a driving circuit according to an embodiment of the present invention, in which the driving circuit 12 may be integrated in a driving chip, and of course, the driving circuit 12 may also include a plurality of discrete modules or chips, and the following embodiment is illustrated by integrating the driving circuit 12 in one driving chip, but the specific structure of the driving circuit 12 is not limited. Optionally, the display device may further include: a low voltage differential signaling LVDS module 122 and a power supply voltage module 123; the output signal of the abnormality detection unit 121 includes an indication signal showing different waveforms of the LVDS abnormality information and the voltage abnormality information.
In this embodiment, the driving circuit 12 further includes a low voltage differential signal LVDS module 122 and a power supply voltage module 123, and the low voltage differential signal LVDS module 122 can output LVDS signals to the display panel 11, and optionally, the LVDS signals may include clock signals, synchronization signals, digital video data signals, and the like, so as to provide control signals for the gate driving circuit 16 and the source driving circuit of the display panel 11. The power supply voltage module 123 can supply various power supply voltages to the display panel. The abnormality detection unit 121 receives the LVDS abnormality information when the LVDS module 122 generates an error that cannot transmit the LVDS signal; when the power supply voltage module 123 generates an error and cannot transmit the voltage signal, the abnormality detection unit 121 receives the voltage abnormality information. The waveform of the indication signal output by the abnormality detection unit 121 upon receiving the LVDS abnormality information is different from the waveform of the indication signal output by the abnormality detection unit 121 upon receiving the voltage abnormality information.
Alternatively, the LVDS anomaly information may include an anomaly detection signal that the LVDS module generates an error; the voltage abnormality information may include an abnormality detection signal that the power supply voltage module generates an error. In this embodiment, although the LVDS abnormal information indicates that the LVDS signal is abnormal, in this embodiment, the LVDS module 122 is configured to output the LVDS signal, and the LVDS signal is abnormal due to the error generated by the LVDS module, in this embodiment, the LVDS abnormal information may include an abnormal detection signal generated by the LVDS module. Similarly, although the voltage abnormality information indicates that the voltage signal is abnormal, in this embodiment, the power supply voltage module 123 is configured to output the voltage signal, and an error generated by the power supply voltage module 123 causes the voltage signal to be abnormal, in this embodiment, the voltage abnormality information may include an abnormality detection signal generated by the power supply voltage module 123.
With continued reference to fig. 3, optionally, the anomaly detection unit 121 may be electrically connected to the LVDS module 122 for receiving LVDS anomaly information; the abnormality detection unit 121 is electrically connected to the power supply voltage module 123, and is configured to receive voltage abnormality information; the abnormality detection unit 121 is electrically connected to the overall controller 3, and is configured to transmit indication signals of different waveforms according to the LVDS abnormality information and the voltage abnormality information.
In this embodiment, when the LVDS module 122 generates an error to cause the LVDS signal to output an abnormal signal, the LVDS module 122 sends the LVDS abnormal information to the abnormal detection unit 121. When the power supply voltage module 123 generates an error to trigger a voltage signal to output abnormal electricity, voltage abnormal information is sent to the abnormal detection unit 121, the output signal of the abnormal detection unit 121 comprises indication signals with different waveforms, and when the abnormal detection unit 121 receives the different abnormal information, the indication information with different waveforms is sent to the main controller 3, optionally, the main controller 3 is a system controller of a display device, and the main controller 3 can distinguish the indication information with different waveforms or send the indication information with different waveforms to external equipment such as an oscilloscope, so that the output waveforms can be recorded and observed conveniently. The embodiment can rapidly judge the specific type of the abnormal information according to the indication signals with different waveforms, the detection speed is high, the acquisition of the abnormal information is not required to be carried out by communicating with the internal register of the driving circuit 12, because the communication interface between the driving chip and the main controller 3 is easily affected by static electricity or other interference factors, the main controller 3 cannot acquire the type of the abnormal information in time, and thus the acquisition of the abnormal information fails, the scheme of the embodiment further improves the acquisition efficiency and the accuracy of the abnormal information and the success rate of the abnormal detection on the basis of improving the abnormal detection efficiency.
Optionally, the display device is a vehicle-mounted display device. If the display device is a vehicle-mounted display device, the overall controller 3 may be a vehicle-mounted controller, where the overall controller is configured to control and coordinate each module of the vehicle system, and the vehicle-mounted controller may distinguish and distinguish the indication information of different waveforms output by the anomaly detection unit 121, obtain the anomaly information corresponding to the waveforms, and complete the acquisition of the anomaly information only by one step, without effectively improving the anomaly detection efficiency and accuracy, and improve the success rate of anomaly detection of the display device.
The abnormality detection unit 121 in this embodiment may output indication signals of different waveforms to flag different abnormality information. In another embodiment, the anomaly detection unit 121 and the overall controller 3 may also perform signal transmission by encoding to output different output signals. Specifically, the abnormality detection unit 121 may encode different abnormality information by one multi-bit byte, for example, may encode by 8-bit byte. For example, if the anomaly detection unit 121 receives LVDS anomaly information, the byte is encoded as 1000 0000; if the abnormality detection unit 121 receives the voltage abnormality information, the above byte is encoded as 0100 0000. After that, the anomaly detection unit 121 sends the serial data formed by the bytes to the overall controller 3 according to a transmission protocol set between the overall controller 3 and the anomaly detection unit 121, for example, an I 2 C communication protocol, and the overall controller 3 can parse the serial data in a memory manner and identify different codes, so that the types of anomaly information are locked according to the correspondence between the codes and the anomaly information, and the anomaly detection mode can also quickly lock the specific types of the anomaly information, thereby improving the anomaly detection efficiency and accuracy. The following embodiment specifically describes a case where the abnormality detection unit 121 identifies the kind of abnormality information by outputting indication signals of different waveforms.
Alternatively, the abnormality detection unit 121 may send the output signal to the overall controller 3 through a hardware pin. When the overall controller 3 is a system controller of the display device or a whole vehicle controller of the vehicle, the abnormality detection unit 121 can be connected with the overall controller 3 through a hardware pin, and send indication signals with different waveforms to the overall controller 3, and the hardware pin is not easy to influence signal transmission due to static electricity or other interference factors, so that reliability of output signal transmission is enhanced, and further accuracy and reliability of abnormality detection of the display device are enhanced, and abnormality of the display device can be positioned in time.
Optionally, the indication signal may include at least: triangular wave waveform indication signals, square wave waveform indication signals and sine wave waveform indication signals. The abnormality detection unit 121 may output the above-described indication signals of different waveforms to indicate different abnormality information. The correspondence between the type of the abnormal information and the waveform of the indication signal may be set according to the requirement or randomly, and this embodiment is not limited thereto, for example, if the abnormal detection unit 121 receives the LVDS abnormal information, the abnormal detection unit 121 may have three choices, and may select one of the indication signals to indicate the LVDS abnormal information. The three waveforms have larger graphic difference, so that the general controller 3 or external equipment can easily and rapidly and accurately identify the shapes of the different waveforms, further rapidly lock the types of the current abnormal information and improve the efficiency and the accuracy of the abnormal detection of the display device. Exemplary, as shown in fig. 4, fig. 4 is a waveform diagram of an indication signal in an abnormal situation according to an embodiment of the present invention. For example, if the anomaly detection unit 121 receives the LVDS anomaly information, and if the data signal in the LVDS signal is abnormal (e.g., signal is missing), the square waveform indication signal S1 is output; if the abnormality detection unit 121 receives the voltage abnormality information, it is assumed that the power supply voltage module 123 outputs a power supply voltage abnormality (e.g., abnormal voltage), and a triangular waveform indication signal S2 is output. In another example, as shown in fig. 5, fig. 5 is a waveform diagram of an indication signal in another abnormal situation provided in an embodiment of the present invention. For example, if the anomaly detection unit 121 receives LVDS anomaly information, it is assumed that the data signal in the LVDS signal is anomalous, a triangular wave waveform indication signal S2 is output; if the abnormality detection unit 121 receives the voltage abnormality information, it is assumed that the power supply voltage module 123 outputs a power supply voltage abnormality, and a square waveform indication signal S1 is output. In another example, as shown in fig. 6, fig. 6 is a waveform diagram of an indication signal in another abnormal situation provided in an embodiment of the present invention. For example, if the abnormality detection unit 121 receives LVDS abnormality information, it is assumed that the data signal in the LVDS signal is abnormal, a sine wave waveform indication signal S3 is output; if the abnormality detection unit 121 receives the voltage abnormality information, it is assumed that the power supply voltage module 123 outputs a power supply voltage abnormality, and a square waveform indication signal S1 is output. The sine wave indication signal S3, the triangular wave indication signal S2 and the square wave indication signal S1 have large waveform differences, so that the identification is easy, and the specific abnormal information type is further identified.
Optionally, the indication signal may further include indication signals of other regular or irregular waveforms, such as a sawtooth waveform indication signal or a spike waveform indication signal, in addition to the triangular waveform indication signal, the square waveform indication signal, and the sine waveform indication signal, and the waveform type of the indication signal is not limited in this embodiment. Optionally, the more and better the waveform types of the indication signals are, the more abnormal conditions of the display device can be conveniently corresponding and indicated, the detection comprehensiveness of the abnormal conditions of the display device is improved, and the reliability of the display device is improved.
Alternatively, the abnormality detection unit may specifically be configured to: when LVDS abnormal information is received, one of a triangular wave waveform indication signal, a square wave waveform indication signal and a sine wave waveform indication signal is sent; upon receiving the voltage abnormality information, an indication signal of a waveform different from the LVDS abnormality information among the triangular waveform indication signal, the square waveform indication signal, and the sinusoidal waveform indication signal is transmitted.
When the indication signal includes a triangular wave indication signal, a square wave indication signal, and a sine wave indication signal, there are various choices of the abnormality detection unit in indicating the abnormality information, for example, any one of the triangular wave indication signal, the square wave indication signal, and the sine wave indication signal is transmitted when the LVDS abnormality information is received; when the voltage abnormality information is received, sending a triangular waveform indication signal, a square waveform indication signal and an indication signal of a waveform different from the LVDS abnormality information in the sine waveform indication signal, wherein 6 corresponding schemes exist in the corresponding relation between the LVDS abnormality information and the voltage abnormality information according to the three indication signals, and the 6 schemes comprise: firstly, when LVDS abnormal information is received, the abnormal detection unit sends a triangular wave waveform indication signal, and when voltage abnormal information is received, the abnormal detection unit sends a square wave waveform indication signal; second, when the LVDS anomaly information is received, the anomaly detection unit sends a triangular wave waveform indication signal, and when the voltage anomaly information is received, the anomaly detection unit sends a sinusoidal wave waveform indication signal; thirdly, when LVDS abnormal information is received, the abnormal detection unit sends a square wave waveform indication signal, and when voltage abnormal information is received, the abnormal detection unit sends a triangular wave waveform indication signal; fourth, when the LVDS abnormal information is received, the abnormal detecting unit sends a square waveform indication signal, and when the voltage abnormal information is received, the abnormal detecting unit sends a sine waveform indication signal; fifthly, when LVDS abnormal information is received, the abnormal detection unit sends a sine wave waveform indication signal, and when voltage abnormal information is received, the abnormal detection unit sends a square wave waveform indication signal; sixth, the abnormality detection unit transmits a sine wave waveform indication signal when the LVDS abnormality information is received, and transmits a triangular wave waveform indication signal when the voltage abnormality information is received. In this embodiment, any one of the schemes may be selected to detect and determine an abnormal situation.
Fig. 7 is a schematic structural diagram of another driving circuit according to an embodiment of the present invention, and optionally, the display panel may further include a touch structure layer; the driving circuit 12 may further include: a touch signal module 124; the output signal of the abnormality detection unit 121 includes an indication signal that displays waveforms of the touch signal abnormality information different from the LVDS abnormality information and the voltage abnormality information.
The abnormal information includes LVDS abnormal information and voltage abnormal information, and may further include touch signal abnormal information, and if the display device is integrated with the touch structure layer, the touch display device is formed, and the driving circuit 12 further includes a touch signal module 124 capable of sending a touch signal to the touch display panel to implement a touch detection function thereof. When the touch signal module 124 generates an error and cannot transmit the touch signal, the anomaly detection unit 121 receives the touch signal anomaly information, and the waveform of the indication signal output by the anomaly detection unit 121 when receiving the touch signal anomaly information is different from the waveform of the indication signal output by the anomaly detection unit 121 when receiving the LVDS anomaly information and the voltage anomaly information.
Alternatively, the touch signal anomaly information may include an anomaly detection signal generated by the touch signal module 124. In this embodiment, although the touch signal abnormality information indicates that the touch signal is abnormal, in this embodiment, the touch signal module 124 is configured to output a touch signal, and an error generated by the touch signal module 124 causes the touch signal to be abnormal, and in this embodiment, the touch signal abnormality information may include an abnormality detection signal generated by the touch signal module 124.
With continued reference to fig. 7, optionally, the abnormality detection unit 121 may be electrically connected to the touch signal module 124, for receiving touch signal abnormality information; the abnormality detection unit 121 may be electrically connected to the overall controller 3 for emitting an indication signal different from waveforms of the LVDS abnormality information and the voltage abnormality information according to the touch signal abnormality information.
In this embodiment, when the LVDS module 122 generates an error to cause the LVDS signal to output an abnormal signal, the LVDS module 122 sends the LVDS abnormal information to the abnormal detection unit 121. When the power supply voltage module 123 generates an error to cause the voltage signal to output abnormal power, the voltage abnormality information is sent to the abnormality detection unit 121. When the touch signal module 124 generates an error to cause the touch signal to output an abnormality, the touch signal module 124 sends the touch signal abnormality information to the abnormality detection unit 121. The output signals of the anomaly detection unit 121 include indication signals with different waveforms, and when the anomaly detection unit 121 receives different anomaly information, the indication information with different waveforms is sent to the overall controller 3, and the embodiment can rapidly judge the specific type of the anomaly information according to the indication signals with different waveforms, so that the detection speed is high, the acquisition of the anomaly information does not need to be performed by communicating with the internal register of the driving circuit 12, and the acquisition efficiency and accuracy of the anomaly information are improved.
Optionally, the indication signal may include at least: a triangular wave waveform indication signal, a square wave waveform indication signal and a sine wave waveform indication signal; the abnormality detection unit may further be configured to: and when the abnormal information of the touch signal is received, sending an indication signal which is different from the waveforms of the LVDS abnormal information and the voltage abnormal information in the triangular wave waveform indication signal, the square wave waveform indication signal and the sine wave waveform indication signal.
When the LVDS abnormal information is received, the abnormal detection unit of the embodiment can output one of a triangular wave waveform indication signal, a square wave waveform indication signal and a sine wave waveform indication signal, and three choices are available; when voltage abnormality information is received, the abnormality detection unit can select one of the indication signals of the remaining two waveforms for output, and two choices exist; when the sine wave waveform indication signal is received, the abnormality detection unit outputs an indication signal of the last waveform. According to the distribution mode, each abnormal information has a unique corresponding waveform indication signal, after the display device or external equipment obtains the waveform of the output signal of the abnormal detection unit, specific abnormal information can be identified and judged directly according to the corresponding relation between different waveform indication information and the abnormal information according to the output signal of the abnormal detection unit, so that the abnormal detection process is rapid and efficient, specific abnormal information does not need to be obtained through a memory in a driving circuit, and communication with a register is not needed to be established.
Specifically, the abnormality detection method of the display device may include six cases: firstly, when LVDS abnormal information is received, the abnormal detection unit sends a triangular wave waveform indication signal, when voltage abnormal information is received, the abnormal detection unit sends a square wave waveform indication signal, and when touch signal abnormal information is received, the abnormal detection unit sends a sine wave waveform indication signal; second, when LVDS abnormal information is received, the abnormal detection unit sends a triangular wave waveform indication signal, when voltage abnormal information is received, the abnormal detection unit sends a sine wave waveform indication signal, and when touch signal abnormal information is received, the abnormal detection unit sends a square wave waveform indication signal; thirdly, when LVDS abnormal information is received, the abnormal detection unit sends a square wave waveform indication signal, when voltage abnormal information is received, the abnormal detection unit sends a triangular wave waveform indication signal, and when touch signal abnormal information is received, the abnormal detection unit sends a sine wave waveform indication signal; fourth, when LVDS anomaly information is received, the anomaly detection unit sends a square wave waveform indication signal, when voltage anomaly information is received, the anomaly detection unit sends a sine wave waveform indication signal, and when touch signal anomaly information is received, the anomaly detection unit sends a triangular wave waveform indication signal; fifthly, when LVDS abnormal information is received, the abnormal detection unit sends a sine wave waveform indication signal, when voltage abnormal information is received, the abnormal detection unit sends a square wave waveform indication signal, and when touch signal abnormal information is received, the abnormal detection unit sends a triangular wave waveform indication signal; sixth, when LVDS anomaly information is received, the anomaly detection unit transmits a sine wave waveform indication signal, when voltage anomaly information is received, the anomaly detection unit transmits a triangular wave waveform indication signal, and when touch signal anomaly information is received, the anomaly detection unit transmits a square wave waveform indication signal.
Alternatively, the abnormality detection unit 121 may include: a Pulse Width Modulation (PWM) circuit; the abnormality detection unit is used for outputting indication signals of different waveforms through the PWM circuit. The abnormality detecting unit 121 in this embodiment may include a PWM circuit, which can adjust the signal to have different waveforms, so that the abnormality detecting unit can output indication signals with different waveforms to distinguish the abnormal situations.
Based on the same conception, the embodiment of the invention also provides an abnormality detection method of the display device, which is suitable for the display device provided by any embodiment of the invention. Fig. 8 is a flowchart of an abnormality detection method of a display device according to an embodiment of the present invention, as shown in fig. 8, where the method of the embodiment includes the following steps:
Step S101, the abnormality detection unit receives the abnormality information.
Step S102, the abnormality detection unit outputs waveforms showing at least two types of abnormality information.
In the embodiment of the invention, the display device comprises a display panel and a driving circuit for driving the display panel, wherein the driving circuit has an abnormality detection function and can generate abnormality information, the driving circuit also comprises an abnormality detection unit, the abnormality detection unit can output signals according to the abnormality information so as to indicate the generation of abnormality, and the output signals of the abnormality detection unit comprise waveforms capable of displaying at least two types of abnormality information.
On the basis of the above embodiment, the abnormality information may include: LVDS anomaly information, voltage anomaly information and touch signal anomaly information; the output signal of the abnormality detection unit at least includes a triangular waveform indication signal, a square waveform indication signal and a sine waveform indication signal, and accordingly, in this embodiment, different abnormality information is further matched with the output signal of different waveforms, so that the different abnormality information is directly displayed by the corresponding waveforms, and specifically, in this embodiment, an abnormality detection method of a display device is further provided, as shown in fig. 9, fig. 9 is a flow chart of an abnormality detection method of another display device provided in this embodiment of the invention, and specific steps include:
In step S201, when the LVDS anomaly information is received, the anomaly detection unit transmits one of a triangular waveform indication signal, a square waveform indication signal and a sine waveform indication signal.
In step S202, when the voltage abnormality information is received, the abnormality detection unit transmits an indication signal of a waveform different from the LVDS abnormality information among the triangular waveform indication signal, the square waveform indication signal, and the sine waveform indication signal.
In step S203, when receiving the touch signal anomaly information, the anomaly detection unit sends an indication signal different from the waveforms of the LVDS anomaly information and the voltage anomaly information from among the triangular waveform indication signal, the square waveform indication signal, and the sine waveform indication signal.
In this embodiment, the driving circuit may further include: the touch control system comprises a low-voltage differential signal LVDS module, a power supply voltage module and a touch control signal module; the LVDS module can send LVDS abnormal information to the abnormal detection unit, and the power supply voltage module can send voltage abnormal information to the abnormal detection unit; the touch signal module can send touch signal abnormality information to the abnormality detection unit. The output signal of the abnormality detection unit at least comprises a triangular wave waveform indication signal, a square wave waveform indication signal and a sine wave waveform indication signal
According to the steps S201 to S203, it is known that when the LVDS abnormal information is received, the abnormality detection unit of the embodiment may output one of the triangular waveform indication signal, the square waveform indication signal and the sine waveform indication signal, which has three choices; when voltage abnormality information is received, the abnormality detection unit can select one of the indication signals of the remaining two waveforms for output, and two choices exist; when the sine wave waveform indication signal is received, the abnormality detection unit outputs an indication signal of the last waveform. According to the distribution mode, each abnormal information has a unique corresponding waveform indication signal, after the display device or external equipment obtains the waveform of the output signal of the abnormal detection unit, specific abnormal information can be identified and judged directly according to the corresponding relation between different waveform indication information and the abnormal information according to the output signal of the abnormal detection unit, so that the abnormal detection process is rapid and efficient, specific abnormal information does not need to be obtained through a memory in a driving circuit, and communication with a register is not needed to be established.
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 (13)
1. A display device, comprising: a display panel and a driving circuit; the driving circuit is electrically connected with the display panel;
The driving circuit includes an abnormality detection unit; the abnormality detection unit is used for receiving abnormality information;
The output signal of the abnormality detection unit includes waveforms showing at least two kinds of abnormality information;
further comprises: a Low Voltage Differential Signaling (LVDS) module and a power supply voltage module;
The output signal of the abnormality detection unit includes an indication signal showing different waveforms of LVDS abnormality information and voltage abnormality information.
2. The display device of claim 1, wherein the display device comprises a display device,
The abnormality detection unit is electrically connected with the LVDS module and is used for receiving LVDS abnormality information;
The abnormality detection unit is electrically connected with the power supply voltage module and is used for receiving voltage abnormality information;
the abnormality detection unit is electrically connected with the master controller and is used for sending indication signals with different waveforms according to the LVDS abnormality information and the voltage abnormality information.
3. The display device according to claim 1, wherein the abnormality detection unit transmits the output signal to a general controller through a hardware pin.
4. The display device of claim 1, wherein the indication signal comprises at least: triangular wave waveform indication signals, square wave waveform indication signals and sine wave waveform indication signals.
5. The display device according to claim 4, wherein the abnormality detection unit is specifically configured to:
When LVDS abnormal information is received, one of a triangular wave waveform indication signal, a square wave waveform indication signal and a sine wave waveform indication signal is sent;
And when the voltage abnormality information is received, sending an indication signal which is different from the waveform of the LVDS abnormality information in the triangular wave waveform indication signal, the square wave waveform indication signal and the sine wave waveform indication signal.
6. The display device of claim 2, wherein the display panel further comprises a touch structure layer;
The driving circuit further includes: a touch signal module; the output signal of the abnormality detection unit includes an indication signal that displays waveforms of the touch signal abnormality information different from the LVDS abnormality information and the voltage abnormality information.
7. The display device of claim 6, wherein the display device comprises a display device,
The abnormality detection unit is electrically connected with the touch signal module and is used for receiving touch signal abnormality information;
the abnormality detection unit is electrically connected with the master controller and is used for sending out indication signals different from waveforms of the LVDS abnormality information and the voltage abnormality information according to the touch signal abnormality information.
8. The display device of claim 7, wherein the LVDS anomaly information includes an anomaly detection signal that the LVDS module generated an error; the voltage abnormality information comprises an abnormality detection signal for generating an error by the power supply voltage module; the touch signal abnormality information comprises an abnormality detection signal for generating an error by the touch signal module.
9. The display device of claim 6, wherein the indication signal comprises at least: a triangular wave waveform indication signal, a square wave waveform indication signal and a sine wave waveform indication signal;
The abnormality detection unit is further configured to:
and when receiving the abnormal information of the touch signal, sending indication signals which are different from the waveforms of the LVDS abnormal information and the voltage abnormal information in the triangular wave waveform indication signals, the square wave waveform indication signals and the sine wave waveform indication signals.
10. The display device according to claim 1, wherein the abnormality detection unit includes: a Pulse Width Modulation (PWM) circuit;
the abnormality detection unit is configured to output indication signals of different waveforms through the PWM circuit.
11. The display device according to claim 1, wherein the display device is an in-vehicle display device.
12. The abnormality detection method according to claim 1, being applied to the display device according to any one of claims 1 to 11, comprising:
The abnormality detection unit receives abnormality information;
the abnormality detection unit outputs waveforms showing at least two kinds of abnormality information.
13. The abnormality detection method of a display device according to claim 12, characterized in that the abnormality information includes: LVDS anomaly information, voltage anomaly information and touch signal anomaly information; the output signal of the abnormality detection unit at least comprises a triangular wave waveform indication signal, a square wave waveform indication signal and a sine wave waveform indication signal;
The abnormality detection method of the display device specifically includes:
When LVDS abnormality information is received, the abnormality detection unit sends one of a triangular wave waveform indication signal, a square wave waveform indication signal and a sine wave waveform indication signal;
When voltage abnormality information is received, an abnormality detection unit sends an indication signal which is different from the waveform of the LVDS abnormality information in the triangular waveform indication signal, the square waveform indication signal and the sine waveform indication signal;
When receiving the touch signal anomaly information, the anomaly detection unit sends an indication signal which is different from the waveforms of the LVDS anomaly information and the voltage anomaly information in the triangular waveform indication signal, the square waveform indication signal and the sine waveform indication signal.
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