CN114373412A - Display device and abnormality detection method thereof - Google Patents
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- 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
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- G06F2218/00—Aspects of pattern recognition specially adapted for signal processing
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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 drive 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 a waveform showing at least two kinds of abnormality information. According to the technical scheme provided by the invention, when different abnormal information appears in the driving circuit, the waveform capable of displaying different abnormal information is output, so that the specific abnormal information can be obtained only through the waveform from the outside, and the abnormal detection efficiency and accuracy are improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display device and an abnormality detection method thereof.
Background
The vehicle-mounted display drive ICs have an abnormality detection function for safety, 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 generally output through a pin to indicate information to notify the system. If the error is abnormal, the system reads the register in the IC to judge the specific error type.
However, the indication information output by the driver IC at present can only indicate whether an abnormality occurs, and the specific abnormality type also needs to read the internal register of the driver 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 aim to improve the abnormality detection efficiency and accuracy.
In a first aspect, 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 drive 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 a waveform showing at least two kinds of abnormality information.
In a second aspect, an embodiment of the present invention provides an abnormality detection method for a display device, which is applied to the display device provided in any embodiment of the present invention, and includes:
the abnormality detection unit receives abnormality information;
the abnormality detection unit outputs a waveform 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, the driving circuit has an abnormality detection function and can generate abnormal information, the driving circuit also comprises an abnormality detection unit which can output signals according to the abnormal information to indicate the generation of the abnormality, the output signals of the abnormality detection unit comprise waveforms capable of displaying at least two kinds of abnormal information, the embodiment can judge the specific type of the abnormal information according to the waveforms of the output signals of the abnormality detection unit, so that the output signals of the abnormality detection unit not only can play the role of indicating the abnormality, but also can display and distinguish different abnormal information through the waveforms, and the display device or external equipment can directly judge the specific abnormal information according to the output signals of the abnormality detection unit without reading the internal memory of the driving circuit again to obtain the abnormal information, the abnormal information acquisition efficiency is effectively improved, and the abnormal detection efficiency and accuracy are improved.
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 under an abnormal condition according to an embodiment of the present invention;
FIG. 5 is a waveform diagram of an indication signal under another abnormal condition according to an embodiment of the present invention;
FIG. 6 is a waveform diagram of an indication signal under another abnormal condition according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another driving circuit according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating an abnormality detection method for a display device according to an embodiment of the present invention;
fig. 9 is a flowchart illustrating another method for detecting an abnormality of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the prior art, the self-checking function of the driving circuit can only detect whether each signal of the driving circuit is abnormal or not. The system of the display device is specifically informed whether the abnormal condition occurs, and the means for informing the abnormal condition is level indication, frequency indication or combination of the level indication and the frequency indication, etc. Specifically, if the level is indicated, the abnormal condition is identified by outputting a high level or a low level, for example, the driving circuit outputs a high level to indicate that the abnormal condition occurs, and the driving circuit outputs a low level to indicate that the abnormal condition does not occur; if the frequency is indicated, the output periodic signal indicates whether the abnormality occurs, for example, the normal condition driving circuit outputs a 60Hz signal, and the abnormal condition driving circuit outputs a 40Hz signal; if the level indication means 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-mentioned prior art, the driving circuit can only notify whether the signal in the driving circuit is abnormal, and the specific abnormal condition cannot be locked, for example, if it is detected which signal the abnormal condition occurs is, it is necessary to further communicate with the register of the driving circuit, and the efficiency of checking the abnormal condition 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 drive 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 a waveform 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, the driving circuit has an abnormality detection function and can generate abnormal information, the driving circuit also comprises an abnormality detection unit which can output a signal according to the abnormal information to indicate the generation of the abnormality, the output signal of the abnormality detection unit comprises a waveform capable of displaying at least two kinds of abnormal information, the embodiment can judge the specific type of the abnormal information according to the waveform of the output signal of the abnormality detection unit, so that the output signal of the abnormality detection unit not only can play the role of indicating the abnormality, but also can display and distinguish different abnormal information according to the waveform, the display device or external equipment can directly judge the specific abnormal information according to the output signal of the abnormality detection unit without reading the internal memory of the driving circuit again to acquire the abnormal information, the abnormal information acquisition efficiency is effectively improved, and the abnormal detection efficiency and accuracy are improved.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection 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 to the sub-pixels 13 in the display area AA through the data lines 14, and provide control signals, such as clock signals, power signals, trigger signals, and the like, to the gate driving circuit 15, so that the gate driving circuit 14 provides scan signals to the sub-pixels 13 through the scan lines 16.
Optionally, for safety, in this embodiment, the driving circuit 12 has an abnormality detection function, which is used to perform self-test on the signal output by the driving circuit 12 to the display panel 11, and if the module self-test of the driving circuit 12 finds that the signal is in error, the driving circuit sends an abnormality information to the abnormality detection unit 121 of the driving circuit 12, and an output signal of the abnormality detection unit 121 notifies the system or an external device of the error.
In the present embodiment, the abnormality information is an abnormality detection signal in which an error occurs in a signal input to the display panel 11 by the driving circuit 12. The abnormal information generated by the error of different signals is different. The output signal of the abnormality detection unit 121 in the present embodiment includes a waveform capable of displaying at least two kinds of abnormality information, the waveform output when the abnormality detecting unit 121 receives one kind of abnormality information is different from the waveform output when the abnormality detecting unit 121 receives another kind of abnormality information, so that the system of the display apparatus or the external device passes through the difference of the waveforms of the output signals of the abnormality detection unit 121, can distinguish the abnormal information corresponding to the waveform, can complete the acquisition of the abnormal information by only one step without reading the internal register of the driving circuit again, effectively improves the abnormal detection efficiency, in addition, in this embodiment, there is an accurate corresponding relationship between the waveform of the output signal of the abnormality detection unit 121 and the abnormality information, so that the type of the abnormality information can be quickly locked according to the waveform, and the accuracy of abnormality detection can be improved.
With reference to fig. 1, optionally, in this embodiment, the driving circuit 12 may be integrated in a driving Chip and bound to the non-display area NA of the display panel to form a Chip On Glass (COG) packaging process, 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 obtain a waveform shape, so as to distinguish an output signal of the abnormality detection unit 121 according to a waveform.
Fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention, optionally, in this embodiment, the driving circuit 12 may also be integrated into a driving Chip and placed in a flexible circuit board 172 arranged in a row to form a Chip On Film (COF) packaging process, and then folded to the backlight side of the display panel by using the characteristics of the flexible circuit board 172, and the setting process of the driving circuit 12 shown in fig. 2 is beneficial to the narrow frame design of the display device, and improves the display effect. The abnormality detection unit 121 transmits an output signal to a system of the display apparatus 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, where the driving circuit 12 may be integrated in a driving chip, and of course, the driving circuit 12 may further include a plurality of discrete modules or chips, and the following embodiments illustrate an example in which the driving circuit 12 is integrated in a driving chip, but do not have a limiting effect on the specific structure of the driving circuit 12. Optionally, the display device may further include: a low voltage differential signaling LVDS module 122 and a supply voltage module 123; the output signal of the abnormality detection unit 121 includes an indication signal showing different waveforms of LVDS abnormality information and voltage abnormality information.
In this embodiment, the driving circuit 12 further includes a low voltage differential signaling LVDS module 122 and a power voltage module 123, the low voltage differential signaling LVDS module 122 can output an LVDS signal to the display panel 11, and optionally, the LVDS signal may include a clock signal, a synchronization signal, a digital video data signal, and the like, so as to provide a control signal for the gate driving circuit 16 and the source driving circuit of the display panel 11. The power supply voltage module 123 can provide various power supply voltages for the display panel. When the LVDS module 122 generates an error and cannot transmit the LVDS signal, the abnormality detecting unit 121 receives the LVDS abnormality information; when the power voltage module 123 generates an error and cannot transmit the voltage signal, the abnormality detecting unit 121 receives the voltage abnormality information. The waveform of the indication signal output by the abnormality detection unit 121 upon receiving LVDS abnormality information is different from the waveform of the indication signal output by the abnormality detection unit 121 upon receiving voltage abnormality information.
Optionally, the LVDS abnormality information may include an abnormality detection signal in which the LVDS module generates an error; the voltage anomaly information may include an anomaly detection signal that the supply voltage module generates an error. In this embodiment, although the LVDS abnormality information indicates that the LVDS signal is abnormal, in this embodiment, the LVDS module 122 is configured to output the LVDS signal, and an error generated by the LVDS module causes the LVDS signal to be abnormal, in this embodiment, the LVDS abnormality information may include an abnormality 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 the 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 abnormal detection signal generated by the power supply voltage module 123.
With continued reference to fig. 3, optionally, the abnormality detecting unit 121 may be electrically connected to the LVDS module 122 for receiving LVDS abnormality 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 send indication signals with different waveforms according to the LVDS abnormality information and the voltage abnormality information.
In this embodiment, when an error occurs in the LVDS module 122 to cause an abnormal output of the LVDS signal, the LVDS module 122 sends an LVDS abnormal information to the abnormality detection unit 121. When a power supply voltage module 123 generates an error to cause a voltage signal to output an abnormal current, sending voltage abnormal information to an abnormal detection unit 121, where an output signal of the abnormal detection unit 121 includes indication signals with different waveforms, and when the abnormal detection unit 121 receives different abnormal information, sending indication information with different waveforms to a master controller 3, optionally, the master controller 3 is a system controller of a display device, and the master controller 3 can distinguish the indication information with different waveforms or send the indication information with different waveforms to external devices such as an oscilloscope, so as to record and observe output waveforms. This embodiment can judge the concrete kind of abnormal information according to the pilot signal of different wave forms fast, detection speed is very fast, need not carry out the communication with drive circuit 12's internal register and carry out acquireing of abnormal information, because communication interface between driver chip and the total controller 3 is easily influenced by static or other interference factors, lead to total controller 3 can't in time acquire the kind of abnormal information, thereby lead to abnormal information to acquire the failure, so the scheme of this embodiment is on the basis that improves abnormal detection efficiency, the acquisition efficiency and the precision of abnormal information have still been improved, the success rate of abnormal detection is improved.
Optionally, the display device is a vehicle-mounted display device. If the display device is a vehicle-mounted display device, the main controller 3 may be a vehicle controller, the vehicle controller is configured to control and coordinate each module of the vehicle system, the vehicle controller can distinguish and distinguish indication information of different waveforms output by the abnormality detection unit 121, and obtain abnormal information corresponding to the waveforms, and the abnormal information can be obtained only by one step, so that the abnormal detection efficiency and accuracy are not required to be effectively improved, and the success rate of abnormal detection of the display device is improved.
In this embodiment, the abnormality detection unit 121 may output an indication of different waveformsSignaling different exception information. In another embodiment, the anomaly detection unit 121 and the overall controller 3 may also perform signal transmission in a coding manner to output different output signals. Specifically, the anomaly detection unit 121 may encode different anomaly information by a byte of multiple bits, for example, by a byte of 8 bits. For example, if the abnormality detection unit 121 receives LVDS abnormality information, the byte is encoded to 10000000; when the abnormality detection unit 121 receives the voltage abnormality information, the byte is encoded to 01000000. Thereafter, the abnormality detecting unit 121 follows a transmission protocol, e.g., I, set between the overall controller 3 and the abnormality detecting unit 1212And the communication protocol C is used for sending serial data formed by bytes to the master controller 3, the master controller 3 can perform memorability analysis on the serial data and identify different codes, so that the types of abnormal information can be locked according to the corresponding relation between the codes and the abnormal information, and the abnormal detection mode can also quickly lock the specific types of the abnormal information and improve the abnormal detection efficiency and accuracy. The following embodiment specifically describes a case where the abnormality detection unit 121 outputs an indication signal of a different waveform to identify the kind of the abnormal information.
Optionally, the abnormality detecting unit 121 may send the output signal to the overall controller 3 through a hardware pin. When master controller 3 is display device's system controller or is the vehicle control unit of vehicle, unusual detecting element 121 can be connected with master controller 3 through a hardware pin, send the pilot signal of different wave forms to master controller 3, the hardware pin is difficult for influencing the transport of signal because of static or other interference factors, the reliability of output signal transmission has been strengthened, and then the accurate nature and the reliability that have strengthened display device and unusually detected, be convenient for in time fix a position display device's abnormal conditions.
Optionally, the indication signal may include at least: a triangular wave indication signal, a square wave indication signal and a sine wave indication signal. The abnormality detection unit 121 may output the indication signals of the different waveforms described above to indicate different abnormality information. The corresponding relationship between the type of the abnormal information and the waveform of the indication signal may be set according to the requirement, or may be randomly set, which is not limited in this embodiment, for example, if the abnormality detection unit 121 receives the LVDS abnormal information, the abnormality detection unit 121 may have three choices, and one of the indication signals may be selected to indicate the LVDS abnormal information. The figure difference of above-mentioned three kinds of wave forms is great for master controller 3 or external equipment carry out quick and accurate discernment to the shape of above-mentioned different wave forms easily, and then lock the kind of current abnormal information fast, improve the efficiency and the precision that display device detected unusually. Illustratively, as shown in fig. 4, fig. 4 is a waveform diagram of an indication signal in an abnormal condition according to an embodiment of the present invention. For example, if the abnormality detection unit 121 receives the LVDS abnormality information and it is assumed that a data signal in the LVDS signal is abnormal (e.g., missing), the square-wave indication signal S1 is output; if the abnormality detection unit 121 receives the voltage abnormality information and assumes that the power supply voltage module 123 outputs the power supply voltage abnormality (e.g., abnormal voltage), it outputs the triangular wave waveform indication signal S2. In another example, as shown in fig. 5, fig. 5 is a waveform diagram of an indication signal in another abnormal condition provided by the embodiment of the present invention. For example, if the abnormality detection unit 121 receives the LVDS abnormality information and assumes that the data signal in the LVDS signal is abnormal, it outputs a triangular waveform indication signal S2; if the abnormality detection unit 121 receives the voltage abnormality information, assuming that the power supply voltage module 123 outputs the power supply voltage abnormality, it outputs the square wave indicating signal S1. In another example, as shown in fig. 6, fig. 6 is a waveform diagram of an indication signal in another abnormal condition provided by the embodiment of the present invention. For example, if the abnormality detection unit 121 receives the LVDS abnormality information and assumes that the data signal in the LVDS signal is abnormal, it outputs a sine wave waveform indication signal S3; if the abnormality detection unit 121 receives the voltage abnormality information, assuming that the power supply voltage module 123 outputs the power supply voltage abnormality, it outputs the square wave indicating signal S1. The sine wave indicating signal S3, the triangular wave indicating signal S2 and the square wave indicating signal S1 have large waveform differences, and are easy to distinguish, thereby identifying specific abnormal information types.
Optionally, the indication signal may include, in addition to the triangular wave indication signal, the square wave indication signal, and the sine wave indication signal, other regular or irregular waveform indication signals such as a sawtooth wave indication signal or a spike wave indication signal, and the waveform type of the indication signal is not limited in this embodiment. Optionally, the more the waveform types of the indication signals are, the better, the more abnormal conditions of the display device can be conveniently corresponded and indicated, the detection comprehensiveness of the abnormal conditions of the display device is improved, and the reliability of the display device is improved.
Optionally, the anomaly detection unit may be specifically configured to: when receiving LVDS abnormal information, sending one of a triangular wave waveform indicating signal, a square wave waveform indicating signal and a sine wave waveform indicating signal; and when the voltage abnormal information is received, sending an indication signal of a waveform different from the LVDS abnormal information in the triangular waveform indication signal, the square waveform indication signal and the sine waveform indication signal.
When the indication signal includes a triangular wave indication signal, a square wave indication signal and a sine wave indication signal, the abnormality detection unit has multiple options when indicating the abnormality information, for example, when receiving the LVDS abnormality information, transmits any one of the triangular wave indication signal, the square wave indication signal and the sine wave indication signal; when the voltage abnormality information is received, it is sufficient to send 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, and there are 6 corresponding schemes for the LVDS abnormality information and the voltage abnormality information in a corresponding relationship of the three indication signals, where the 6 schemes include: firstly, when receiving LVDS abnormal information, an abnormality detection unit sends a triangular waveform indication signal, and when receiving voltage abnormal information, the abnormality detection unit sends a square waveform indication signal; secondly, when LVDS abnormal information is received, the abnormal detection unit sends a triangular wave waveform indicating signal, and when voltage abnormal information is received, the abnormal detection unit sends a sine wave waveform indicating signal; thirdly, when receiving LVDS abnormal information, the abnormal detection unit sends a square wave waveform indicating signal, and when receiving voltage abnormal information, the abnormal detection unit sends a triangular wave waveform indicating signal; fourthly, when receiving LVDS abnormal information, the abnormal detection unit sends a square wave waveform indicating signal, and when receiving voltage abnormal information, the abnormal detection unit sends a sine wave waveform indicating signal; fifthly, when receiving LVDS abnormal information, the abnormality detection unit sends a sine wave waveform indication signal, and when receiving voltage abnormal information, the abnormality detection unit sends a square wave waveform indication signal; sixthly, the abnormality detection unit transmits a sine wave waveform indication signal when receiving LVDS abnormality information, and transmits a triangular wave waveform indication signal when receiving voltage abnormality information. In the embodiment, any scheme can be selected for detecting and judging the abnormal condition.
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 drive circuit 12 may further include: a touch signal module 124; the output signal of the abnormality detection unit 121 includes an indication signal showing a waveform of touch signal abnormality information different from the LVDS abnormality information and the voltage abnormality information.
The abnormal information may include abnormal information of the touch signal in addition to the LVDS abnormal information and the voltage abnormal information, if the display device is integrated with the touch structure layer, the display device forms a touch display device, 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 fails to transmit the touch signal, the abnormality detection unit 121 receives the touch signal abnormality information, and the waveform of the indication signal output by the abnormality detection unit 121 when receiving the touch signal abnormality information is different from the waveform of the indication signal output by the abnormality detection unit 121 when receiving the LVDS abnormality information and the voltage abnormality information.
Optionally, the touch signal abnormality information may include that the touch signal module 124 generates an erroneous abnormality detection signal. 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 the touch signal, and the error generated by the touch signal module 124 causes the touch signal to be abnormal, in this embodiment, the touch signal abnormality information may include an abnormal detection signal generated by the touch signal module 124.
With continued reference to fig. 7, optionally, the anomaly detection unit 121 may be electrically connected to the touch signal module 124, and configured to receive touch signal anomaly information; the abnormality detection unit 121 may be electrically connected to the overall controller 3, and is configured to send an indication signal having a waveform different from the LVDS abnormality information and the voltage abnormality information according to the touch signal abnormality information.
In this embodiment, when an error occurs in the LVDS module 122 to cause an abnormal output of the LVDS signal, the LVDS module 122 sends an LVDS abnormal information to the abnormality detection unit 121. When the power voltage module 123 generates an error to trigger the voltage signal to output an abnormal voltage, it sends a voltage abnormal message to the abnormal detection unit 121. When the touch signal module 124 generates an error to cause an abnormal touch signal output, the touch signal module 124 sends the abnormal touch signal information to the abnormality detection unit 121. The output signal of the abnormality detection unit 121 includes indication signals with different waveforms, and when the abnormality detection unit 121 receives different abnormal information, the indication information with different waveforms is sent to the master controller 3.
Optionally, the indication signal may include at least: a triangular wave indication signal, a square wave indication signal and a sine wave indication signal; the anomaly detection unit may be further operable to: when receiving the abnormal information of the received touch signal, sending a triangular wave shape indicating signal, a square wave shape indicating signal and a sine wave shape indicating signal which are different from the LVDS abnormal information and the voltage abnormal information.
When receiving LVDS abnormal information, the abnormality detection unit of this embodiment may output one of a triangular waveform indication signal, a square waveform indication signal, and a sine waveform indication signal, with three options; when the voltage abnormality information is received, the abnormality detection unit can select one of the indication signals of the remaining two waveforms to output, and has two choices; when a sine wave indicating signal is received, the abnormality detecting unit outputs an indicating signal of the last waveform. Through the distribution mode, each kind of abnormal information has a unique corresponding waveform indicating signal, and after the display device or external equipment acquires the waveform of the output signal of the abnormal detection unit, specific abnormal information can be directly identified and judged according to the corresponding relation between different waveform indicating information and the abnormal information and the output signal of the abnormal detection unit, so that the abnormal detection process is rapid and efficient, the specific abnormal information does not need to be acquired through a drive circuit internal memory, 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 receiving LVDS abnormal information, an abnormality detection unit sends a triangular wave indicating signal, when receiving voltage abnormal information, the abnormality detection unit sends a square wave indicating signal, and when receiving touch signal abnormal information, the abnormality detection unit sends a sine wave indicating signal; secondly, when LVDS abnormal information is received, the abnormality detection unit sends a triangular wave indicating signal, when voltage abnormal information is received, the abnormality detection unit sends a sine wave indicating signal, and when touch signal abnormal information is received, the abnormality detection unit sends a square wave indicating signal; thirdly, when receiving LVDS abnormal information, the abnormality detection unit sends a square wave waveform indication signal, when receiving voltage abnormal information, the abnormality detection unit sends a triangular wave waveform indication signal, and when receiving touch signal abnormal information, the abnormality detection unit sends a sine wave waveform indication signal; fourthly, when LVDS abnormal information is received, the abnormality detection unit sends a square wave waveform indicating signal, when voltage abnormal information is received, the abnormality detection unit sends a sine wave waveform indicating signal, and when touch signal abnormal information is received, the abnormality detection unit sends a triangular wave waveform indicating signal; fifthly, when receiving LVDS abnormal information, the abnormality detection unit sends a sine wave indication signal, when receiving voltage abnormal information, the abnormality detection unit sends a square wave indication signal, and when receiving touch signal abnormal information, the abnormality detection unit sends a triangular wave indication signal; sixthly, when receiving LVDS abnormal information, the abnormality detecting unit sends a sine wave waveform indicating signal, when receiving voltage abnormal information, the abnormality detecting unit sends a triangular wave waveform indicating signal, and when receiving touch signal abnormal information, the abnormality detecting unit sends a square wave waveform indicating signal.
Optionally, the abnormality detecting unit 121 may include: a Pulse Width Modulation (PWM) circuit; the abnormity detection unit is used for outputting indication signals with different waveforms through the PWM circuit. In this embodiment, the abnormality detection unit 121 may include a PWM circuit, and the PWM circuit may adjust the signals with different waveforms of the stroke, so that the abnormality detection unit may output indication signals with different waveforms to distinguish the abnormal condition.
Based on the same concept, the embodiment of the invention also provides an abnormality detection method for the display device, which is suitable for the display device provided by any embodiment of the invention. Fig. 8 is a schematic flowchart of an abnormality detection method for a display device according to an embodiment of the present invention, and as shown in fig. 8, the method of the embodiment includes the following steps:
step S101, the abnormality detection unit receives abnormality information.
Step S102, the abnormity detection unit outputs and displays at least two waveforms of abnormity information.
In the embodiment of the invention, the display device comprises a display panel and a driving circuit for driving the display panel, the driving circuit has an abnormality detection function and can generate abnormal information, the driving circuit also comprises an abnormality detection unit which can output a signal according to the abnormal information to indicate the generation of the abnormality, the output signal of the abnormality detection unit comprises a waveform capable of displaying at least two kinds of abnormal information, the embodiment can judge the specific type of the abnormal information according to the waveform of the output signal of the abnormality detection unit, so that the output signal of the abnormality detection unit not only can play the role of indicating the abnormality, but also can display and distinguish different abnormal information according to the waveform, the display device or external equipment can directly judge the specific abnormal information according to the output signal of the abnormality detection unit without reading the internal memory of the driving circuit again to acquire the abnormal information, the abnormal information acquisition efficiency is effectively improved, and the abnormal detection efficiency and accuracy are improved.
On the basis of the above embodiment, the exception information may include: LVDS abnormal information, voltage abnormal information and touch signal abnormal 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, the present embodiment further matches different abnormality information with the output signal of different waveforms, so that different abnormality information is directly displayed by the corresponding waveforms, specifically, an embodiment of the present invention further provides an abnormality detection method for a display device, as shown in fig. 9, fig. 9 is a flowchart of another abnormality detection method for a display device provided by the embodiment of the present invention, and the specific steps include:
step S201, when receiving LVDS abnormal information, the abnormality detecting unit sends one of a triangular waveform indication signal, a square waveform indication signal, and a sine waveform indication signal.
Step S202, when the voltage abnormal information is received, the abnormal detection unit sends an indication signal of a waveform different from the LVDS abnormal information in the triangular wave waveform indication signal, the square wave waveform indication signal and the sine wave waveform indication signal.
Step S203, when receiving the abnormal information of the received touch signal, the abnormality detection unit sends an indication signal of a waveform different from the LVDS abnormal information and the voltage abnormal information 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 low-voltage differential signal LVDS module, the power supply voltage module and the touch 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 the touch signal abnormal information to the abnormal detection unit. The output signal of the abnormality detection unit includes at least a triangular waveform indication signal, a square waveform indication signal and a sine waveform indication signal
According to the above steps S201 to S203, it can be seen that when LVDS abnormal information is received, the abnormal detection unit in this embodiment may output one of a triangular waveform indication signal, a square waveform indication signal and a sine waveform indication signal, and there are three options; when the voltage abnormality information is received, the abnormality detection unit can select one of the indication signals of the remaining two waveforms to output, and has two choices; when a sine wave indicating signal is received, the abnormality detecting unit outputs an indicating signal of the last waveform. Through the distribution mode, each kind of abnormal information has a unique corresponding waveform indicating signal, and after the display device or external equipment acquires the waveform of the output signal of the abnormal detection unit, specific abnormal information can be directly identified and judged according to the corresponding relation between different waveform indicating information and the abnormal information and the output signal of the abnormal detection unit, so that the abnormal detection process is rapid and efficient, the specific abnormal information does not need to be acquired through a drive circuit internal memory, and communication with a register is not needed to be established.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (14)
1. A display device, comprising: a display panel and a driving circuit; the driving circuit is electrically connected with the display panel;
the drive 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 a waveform showing at least two kinds of abnormality information.
2. The display device according to claim 1, further comprising: a low voltage differential signal 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.
3. The display device according to claim 2,
the abnormality detection unit is electrically connected with the LVDS module and used for receiving LVDS abnormality information;
the abnormality detection unit is electrically connected with the power supply voltage module and used for receiving voltage abnormality information;
and the abnormity detection unit is electrically connected with the master controller and used for sending indication signals with different waveforms according to the LVDS abnormity information and the voltage abnormity information.
4. The display device according to claim 1, wherein the abnormality detection unit sends the output signal to an overall controller through a hardware pin.
5. The display device according to claim 2, wherein the indication signal includes at least: a triangular wave indication signal, a square wave indication signal and a sine wave indication signal.
6. The display device according to claim 5, wherein the abnormality detection unit is specifically configured to:
when receiving LVDS abnormal information, sending one of a triangular wave waveform indicating signal, a square wave waveform indicating signal and a sine wave waveform indicating signal;
and when receiving the voltage abnormal information, sending an indication signal of a waveform different from the LVDS abnormal information in the triangular wave waveform indication signal, the square wave waveform indication signal and the sine wave waveform indication signal.
7. The display device according to claim 3, wherein the display panel further comprises a touch structure layer;
the drive circuit further includes: a touch signal module; the output signal of the abnormality detection unit includes an indication signal showing a waveform of touch signal abnormality information different from the LVDS abnormality information and the voltage abnormality information.
8. The display device according to claim 7,
the abnormality detection unit is electrically connected with the touch signal module and used for receiving touch signal abnormality information;
the abnormity detection unit is electrically connected with the master controller and used for sending out an indication signal of a waveform different from the LVDS abnormity information and the voltage abnormity information according to the touch signal abnormity information.
9. The display device according to claim 8, wherein the LVDS abnormality information includes an abnormality detection signal in which the LVDS module generates an error; the voltage abnormality information comprises an abnormality detection signal generated by the power supply voltage module in error; the touch signal abnormality information includes an abnormality detection signal in which the touch signal module generates an error.
10. The display device according to claim 7, wherein the indication signal includes at least: a triangular wave indication signal, a square wave indication signal and a sine wave indication signal;
the abnormality detection unit is further configured to:
and when receiving the abnormal information of the received touch signal, sending an indication signal of a waveform different from 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.
11. The display device according to claim 2, wherein the abnormality detection unit includes: a Pulse Width Modulation (PWM) circuit;
the abnormity detection unit is used for outputting indication signals with different waveforms through the PWM circuit.
12. The display device according to claim 1, wherein the display device is an in-vehicle display device.
13. The method for detecting an abnormality in a display device according to claim 1, applied to the display device according to any one of claims 1 to 12, comprising:
the abnormality detection unit receives abnormality information;
the abnormality detection unit outputs a waveform showing at least two kinds of abnormality information.
14. The abnormality detection method for a display device according to claim 13, wherein the abnormality information includes: LVDS abnormal information, voltage abnormal information and touch signal abnormal information; the output signals of the abnormality detection unit at least comprise triangular wave waveform indication signals, square wave waveform indication signals and sine wave waveform indication signals;
the abnormality detection method of the display device specifically includes:
when LVDS abnormal information is received, the abnormal detection unit sends one of a triangular waveform indication signal, a square waveform indication signal and a sine waveform indication signal;
when voltage abnormal information is received, the abnormal detection unit sends an indication signal of a waveform different from the LVDS abnormal information in the triangular waveform indication signal, the square waveform indication signal and the sine waveform indication signal;
when receiving the abnormal information of the received touch signal, the abnormality detection unit sends an indication signal of a waveform different from the LVDS abnormal information and the voltage abnormal information among the triangular waveform indication signal, the square waveform indication signal and the sine waveform indication signal.
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