CN116560145A - Detection device, detection method, electronic equipment and storage medium - Google Patents
Detection device, detection method, electronic equipment and storage medium Download PDFInfo
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- CN116560145A CN116560145A CN202310624551.4A CN202310624551A CN116560145A CN 116560145 A CN116560145 A CN 116560145A CN 202310624551 A CN202310624551 A CN 202310624551A CN 116560145 A CN116560145 A CN 116560145A
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- 238000001514 detection method Methods 0.000 title claims abstract description 248
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 57
- 238000010438 heat treatment Methods 0.000 claims description 188
- 238000000034 method Methods 0.000 claims description 17
- 238000004590 computer program Methods 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 8
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 6
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 6
- 229910001887 tin oxide Inorganic materials 0.000 claims description 6
- 239000004502 smoke tin Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 11
- 238000012544 monitoring process Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136254—Checking; Testing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The application discloses a detection device, a detection method, electronic equipment and a storage medium, which can be applied to the field of Internet of things, the field of chips or the field of finance. The device comprises a backlight circuit detection module, wherein the backlight circuit detection module is connected with a backlight circuit, the backlight circuit detection module comprises a pulse detection circuit and a backlight circuit detection sub-module, the backlight circuit comprises a first comparator and an adjusting tube, the backlight circuit detection sub-module is connected with the pulse detection circuit and is used for acquiring detection signals, inputting the detection signals into the pulse detection circuit to obtain result signals, determining the working state of the backlight circuit according to the result signals, and the detection signals comprise a first PWM signal, an output signal and a source signal; and the pulse detection circuit is used for receiving the detection signal and outputting a result signal. Therefore, when the liquid crystal display breaks down, whether the backlight circuit of the liquid crystal display breaks down can be rapidly and accurately determined, and the detection accuracy and efficiency are improved.
Description
Technical Field
The present disclosure relates to the field of liquid crystal display detection technologies, and in particular, to a detection device, a detection method, an electronic device, and a storage medium.
Background
The vulnerability of the liquid crystal display is high, and for example, the liquid crystal display of the automatic teller machine (AutomaticTellerMachine, ATM), failure of the liquid crystal display can cause no image, black screen and the like on the display panel. However, the reasons for the faults are various, and based on the prior art, the fault reasons cannot be rapidly and accurately judged only according to the fault expression form, namely the faults of the backlight circuit, the power supply faults, the panel faults caused by large difference between the ambient temperature and the normal working temperature or the faults of other reasons cannot be judged.
The liquid crystal display is detected by consuming a large amount of human resources, meanwhile, manual detection often depends on the experience of workers, and the efficiency and accuracy of the manual detection are low.
Disclosure of Invention
The application provides a detection device, a detection method, electronic equipment and a storage medium, which can detect through a self-checking module of a liquid crystal display, reduce human resources and maintenance cost and improve detection efficiency and accuracy.
In a first aspect, the present application provides a detection device, applied to a liquid crystal display, the device includes a backlight circuit detection module, the backlight circuit detection module is connected with a backlight circuit, the backlight circuit detection module includes a pulse detection circuit and a backlight circuit detection submodule, the backlight circuit includes a first comparator and an adjusting tube, the backlight circuit detection submodule with the pulse detection circuit is connected, wherein:
the backlight circuit detection submodule is used for acquiring detection signals, inputting the detection signals into the pulse detection circuit to obtain result signals, wherein the detection signals comprise a first Pulse Width Modulation (PWM) signal of the input end of the first comparator, an output signal of the output end of the first comparator and a source signal of the adjusting tube;
the pulse detection circuit is used for receiving the detection signal and outputting the result signal;
the backlight circuit detection submodule is further used for determining the working state of the backlight circuit according to the result signal.
Optionally, the logic state of the result signal includes a high level or a low level, and the pulse detection circuit is specifically configured to:
the detection signal is received and the detection signal is received,
if the waveform of the pulse detection circuit is unchanged within the preset time threshold, outputting the logic state of the result signal to be low level;
and if the waveform of the pulse detection circuit is changed within the preset time threshold, outputting the logic state of the result signal to be high level.
Optionally, the backlight circuit detection submodule is further configured to:
and sending an adjustment instruction to the backlight circuit, wherein the adjustment instruction is used for instructing the first comparator to adjust the voltage values of the output signal and the source signal to a first preset interval.
Optionally, the device further includes a driver integrated circuit detection module, where the driver integrated circuit detection module is connected to the driver integrated circuit, and the driver integrated circuit detection module is configured to:
acquiring a return signal of an output end of the drive integrated circuit, and judging the display state of a liquid crystal panel of the liquid crystal display according to the return signal;
if the frequency of the return signal accords with a second preset interval, the output detection result is that the display of the liquid crystal panel is normal, and if the frequency of the return signal does not accord with the second preset interval, the output detection result is that the display of the liquid crystal panel is abnormal.
Optionally, the device further includes a heating circuit detection module, the heating circuit detection module is connected with a heating circuit, the heating circuit detection module includes a photoelectric coupler, a second comparator and a first controller, the heating circuit includes a heating output end and a heating ground end, wherein:
the photoelectric coupler is used for receiving the voltage sampling value of the heating output end, comparing the voltage sampling value with a preset voltage threshold value and outputting a first signal to the second comparator, wherein the logic state of the first signal comprises a high level or a low level;
the second comparator is used for comparing the voltage value of the heating ground terminal with the first signal to obtain a second comparison result, and the second comparison result is used for representing the working state of the heating circuit; transmitting the second comparison result to the first controller;
and the first controller is used for judging the working state of the heating circuit according to the second comparison result.
Optionally, the heating circuit includes a first heating submodule, a second heating submodule, an indium tin oxide heating resistor and a second controller, the second heating submodule includes the heating output end and the heating ground end, and the first heating submodule is connected with the second heating submodule through the indium tin oxide heating resistor, wherein:
the first heating submodule is used for receiving a first heating signal, and the first heating signal is used for controlling the first heating submodule to be conducted;
the second heating submodule is used for receiving a second heating signal, and the second heating signal is used for controlling the second heating submodule to be conducted;
the heating resistor of the smoke tin oxide is used for receiving the current input into the heating resistor of the smoke tin oxide and controlling the current to flow to the heating ground terminal when the first heating sub-module and the second heating sub-module are in a conducting state;
the second controller is configured to send the first heating signal to the first heating submodule and send the second heating signal to the second heating submodule when the ambient temperature is lower than a preset temperature threshold, and control the heating output end to be connected with the heating ground end when the first heating submodule and the second heating submodule are in a conducting state.
Optionally, the second heating signal is a second PWM signal, a waveform duty cycle of the second PWM signal is used to control a heating temperature, and the second controller is further configured to:
and stopping sending the first heating signal to the first heating submodule and stopping sending the second heating signal to the second heating submodule when the ambient temperature is not lower than the preset temperature threshold.
Optionally, the liquid crystal display includes a backlight circuit power supply, a heating circuit power supply, and a driving integrated circuit power supply, the apparatus further includes a power detection module including a power detection sub-module and a third comparator, wherein:
the third comparator is configured to obtain a voltage value of the backlight circuit power supply, the heating circuit power supply, or the driving integrated circuit power supply, and obtain a third comparison result, where the third comparison result is used to characterize a working state of the backlight circuit power supply, the heating circuit power supply, or the driving integrated circuit power supply;
the power supply detection sub-module is configured to obtain a working state of the backlight circuit power supply, the heating circuit power supply or the driving integrated circuit power supply according to the third comparison result.
In a second aspect, the present application further provides a detection method applied to a liquid crystal display, where the liquid crystal display includes a backlight circuit detection module, where the backlight circuit detection module is connected to a backlight circuit, the backlight circuit detection module includes a pulse detection circuit and a backlight circuit detection sub-module, the backlight circuit includes a first comparator and an adjustment tube, and the backlight circuit detection sub-module is connected to the pulse detection circuit, and the method includes:
acquiring a detection signal, wherein the detection signal comprises a first Pulse Width Modulation (PWM) signal of the input end of the first comparator, an output signal of the output end of the first comparator and a source signal of the adjusting tube;
inputting the detection signal into the pulse detection circuit to obtain a result signal;
and determining the working state of the backlight circuit according to the result signal.
Optionally, the logic state of the result signal includes a high level or a low level, and the process of obtaining the result signal includes:
inputting the detection signal into the pulse detection circuit,
if the waveform of the pulse detection circuit is unchanged within the preset time threshold, outputting the logic state of the result signal to be low level;
and if the waveform of the pulse detection circuit is changed within the preset time threshold, outputting the logic state of the result signal to be high level.
Optionally, before the inputting of the detection signal into the pulse detection circuit to obtain the result signal, the method further comprises:
and sending an adjustment instruction to the backlight circuit, wherein the adjustment instruction is used for instructing the first comparator to adjust the voltage values of the output signal and the source signal to a first preset interval.
In a third aspect, the present application also provides an electronic device, including a processor and a memory:
the memory is used for storing a computer program;
the processor is configured to execute the detection method provided in the second aspect according to the computer program.
In a fourth aspect, the present application further provides a computer readable storage medium for storing a computer program for executing the detection method provided in the second aspect.
From this, this application has following beneficial effect:
the application provides a detection device, is applied to liquid crystal display, the device includes backlight circuit detection module, and backlight circuit detection module connects backlight circuit, and backlight circuit detection module includes pulse detection circuit and backlight circuit detection submodule piece, backlight circuit includes first comparator and adjusting tube, backlight circuit detection submodule piece with pulse detection circuit connects, wherein: the backlight circuit detection submodule is used for acquiring detection signals, inputting the detection signals into the pulse detection circuit to obtain result signals, wherein the detection signals comprise a first Pulse Width Modulation (PWM) signal of the input end of the first comparator, an output signal of the output end of the first comparator and a source signal of the adjusting tube; the pulse detection circuit is used for receiving the detection signal and outputting the result signal; the backlight circuit detection submodule is further used for determining the working state of the backlight circuit according to the result signal. Therefore, when the liquid crystal display breaks down, whether the backlight circuit of the liquid crystal display is normal or not can be rapidly and accurately determined through the backlight circuit detection module, the detection accuracy and efficiency are improved, and the consumption of manpower and cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a detection device 100 according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a backlight circuit detection module 10 according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a driving integrated circuit detection module 20 according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a heating circuit detection module 30 according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a power detection module 40 according to an embodiment of the present application;
FIG. 6 is a schematic flow chart of a detection method according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an electronic device 700 according to an embodiment of the present application.
Detailed Description
The plurality of the embodiments of the present application refers to greater than or equal to two. It should be noted that, in the description of the embodiments of the present application, the terms "first," "second," and the like are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance, or alternatively, for indicating or implying a sequential order.
It should be noted that the detection device, the detection method, the electronic device and the storage medium of the present invention can be used in the field of the internet of things, the chip field or the financial field, and also can be used in any field other than the field of the internet of things, the chip field and the financial field. The above is merely an example, and the application fields of the detection device, the detection method, the electronic apparatus, and the storage medium of the present invention are not limited.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The vulnerability of the lcd is high, for example, the lcd of ATM, and the failure of the lcd may cause the display panel to have no image or black screen. However, there are various reasons for the failure, and based on the current prior art, the failure reason (such as a backlight circuit failure, a power failure, a panel failure caused by a large difference between the ambient temperature and the normal operating temperature, etc.) cannot be determined only according to the manifestation of the failure. The liquid crystal display is detected by consuming a large amount of human resources, meanwhile, manual detection often depends on the experience of workers, and the efficiency and accuracy of the manual detection are low.
Based on this, the embodiment of the application provides a detection device, is applied to liquid crystal display, the device includes backlight circuit detection module, backlight circuit detection module connects backlight circuit, backlight circuit includes first comparator and adjusting tube, backlight circuit detection module includes pulse detection circuit and backlight circuit detection submodule, backlight circuit detection submodule with pulse detection circuit connects, wherein: the backlight circuit detection submodule is used for acquiring a detection signal, inputting the detection signal into the pulse detection circuit to obtain a result signal, wherein the detection signal comprises a first pulse width modulation (PulseWidthModulation, PWM) signal of the input end of the first comparator, an output signal of the output end of the first comparator and a source electrode signal of the adjusting tube; the pulse detection circuit is used for receiving the detection signal and outputting the result signal; the backlight circuit detection submodule is further used for determining the working state of the backlight circuit according to the result signal. Therefore, when the liquid crystal display breaks down, whether the backlight circuit of the liquid crystal display is normal or not can be rapidly and accurately determined through the backlight circuit detection module, the detection accuracy and efficiency are improved, and the consumption of manpower and cost is reduced.
In addition, the detection device can further comprise a driving integrated circuit detection module, a heating circuit detection module and a power supply detection module, wherein the display state of the liquid crystal panel of the liquid crystal display, the working state of the heating circuit and the working state of a power supply (such as a backlight circuit power supply, a heating circuit power supply and a driving integrated circuit power supply) can be respectively determined through the self-detection module, so that the detection efficiency is improved.
In order to facilitate understanding of the specific implementation of the detection method provided in the embodiments of the present application, the following description will be given with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a detection device 100 according to an embodiment of the present application, which is applied to a liquid crystal display, where the detection device 100 may include a backlight circuit detection module 10, a driving integrated circuit detection module 20, a heating circuit detection module 30, and a power supply detection module 40, where: a backlight circuit detection module 10 for determining an operation state of the backlight circuit; a driving integrated circuit detection module 20 for judging the display state of the liquid crystal panel; a heating circuit detection module 30 for judging the operation state of the heating circuit; the power detection module 40 is configured to obtain an operating state of the backlight circuit power supply, the heating circuit power supply, or the driving integrated circuit power supply.
Therefore, by the device provided by the embodiment of the application, the backlight circuit fault, the heating circuit fault, the liquid crystal panel fault or the power supply fault can be rapidly and accurately judged after the liquid crystal display is in fault, and the detection efficiency is improved.
Note that common faults of the backlight circuit may be an open circuit and a short circuit of a light emitting diode (LightEmittingDiode, LED), a short circuit and an open circuit of a Metal-Oxide-semiconductor field-Effect Transistor (MOSFET), which is a MOS transistor, a comparator is not operated, an input PWM signal wave is abnormal, and the like. The inventor finds that the LED open circuit and the MOS tube open circuit can lead the source voltage of the adjusting tube to be 0V, and the grid control signal is normal; the short circuit of the LED can increase the voltage difference between the drain electrode and the source electrode of the adjusting tube, and the grid control signal is normal; when the comparator is abnormal, the source voltage of the adjusting tube is 0V, and the grid control signal is 0. Therefore, when the circuit is in fault, the type and position of the fault of the backlight circuit can be obtained by monitoring the PWM signal input by the generator, the output signal of the comparator and the source signal of the adjusting tube.
In addition, since the lcd is a serial-parallel structure in normal use, there is a great difficulty in monitoring signals and a high false detection rate, so that only the operating states of circuits other than the backlight panel are detected, and a specific detection process is shown in fig. 2.
Fig. 2 is a schematic structural diagram of a backlight circuit detection module 10 provided in the embodiment of the present application, which is applied to a liquid crystal display, referring to fig. 2, the backlight circuit detection module 10 is connected to a backlight circuit 1, the backlight circuit 1 includes a first comparator 111 and an adjusting tube 112, the backlight circuit detection module 10 includes a backlight circuit detection sub-module 121 and a pulse detection circuit 122, and the backlight circuit detection sub-module 121 is connected to the pulse detection circuit 122, wherein: a backlight circuit detection submodule 121, configured to obtain a detection signal, input the detection signal to the pulse detection circuit 122, and obtain a result signal, where the detection signal includes a first PWM signal at an input end of the first comparator 111, an output signal at an output end of the first comparator 111, and a source signal of the adjustment tube 112 (corresponding to S1, S2, and S3, respectively); a pulse detection circuit 122 for receiving the detection signal and outputting a result signal; the backlight circuit detection submodule 121 is further configured to determine an operating state of the backlight circuit 1 according to the result signal; that is, the first comparator 111 receives S1 and generates S2, and the adjustment tube 112 generates S3.
In some implementations, the logic state of the resulting signal includes a high level, denoted by a "1", or a low level, denoted by a "0", and the pulse detection circuit 122 is specifically configured to: receiving the detection signal, if the waveform of the pulse detection circuit 122 is unchanged within the time threshold, the logic state of the output result signal is low level; if the waveform of the pulse detection circuit 122 changes within the preset time threshold, the logic state of the output result signal is high.
As one example, S1, S2, and S3 are input to the pulse detection circuit 122, and a result "s1s2s3=111" is generated, indicating that the backlight circuit 1 is functioning normally; if the result "s1s2s3=000" is generated, when the backlight circuit voltage is normal, it indicates that the first PWM signal (i.e., S1) is input abnormally; if the result "s1s2s3=100" is generated, it indicates that the first comparator 111 is abnormal; if "s1s2s3=110", it indicates that the MOS transistor is abnormal in operation.
In other implementations, because the operating voltage of the first comparator 111 and the adjusting tube 112 cannot exceed 3.3V due to the chip withstand voltage problem, the backlight circuit detecting sub-module 121 is further configured to send an adjusting instruction to the backlight circuit 1, where the adjusting instruction is configured to instruct the first comparator 111 to adjust the voltage values of the output signal and the source signal to a first preset interval, and specifically, the first comparator 111 adjusts the voltage values of the output signal and the source signal to be between 0V and 3.3V.
Fig. 3 is a schematic structural diagram of a driving integrated circuit detection module 20 according to an embodiment of the present application, where the driving integrated circuit detection module 20 is connected to the driving integrated circuit 2, and the driving integrated circuit detection module 20 is configured to: acquiring a return signal of an output end of the driving integrated circuit 2, and judging the display state of a liquid crystal panel of the liquid crystal display according to the return signal; if the frequency of the return signal accords with the second preset interval, the output detection result is that the display of the liquid crystal panel is normal, and the output detection result is that the display of the liquid crystal panel is abnormal.
It should be noted that, when the liquid crystal panel of the liquid crystal display is in normal operation, the output end of the driving integrated circuit 2 outputs a return signal, the cycle frequency of the return signal is between 60KHz and 80KHz (i.e. the second preset interval), wherein the typical frequency is 73.5KHz; if the return signal does not belong to the second preset interval, the liquid crystal panel of the liquid crystal display is abnormal, and after the liquid crystal display works abnormally, the controller of the liquid crystal display can control the peripheral circuit to work, and the liquid crystal panel of the liquid crystal display is powered on and reset until the liquid crystal panel works normally.
Fig. 4 is a schematic structural diagram of a heating circuit detection module 30 provided in the embodiment of the present application, the heating circuit detection module 30 is connected to a heating circuit 3, the heating circuit 3 includes a heating output end 3121 and a heating ground end 3122, the heating circuit detection module 30 includes a photoelectric coupler 321, a second comparator 322 and a first controller 323, where: the optocoupler 321 is configured to receive the voltage sampling value of the heating output end 3121, compare the voltage sampling value with a preset voltage threshold, and output a first signal to the second comparator 3122, where the logic state of the first signal includes a high level or a low level; a second comparator 322, configured to compare the voltage value of the heating ground 3122 with the first signal to obtain a second comparison result, where the second comparison result is used to characterize the working state of the heating circuit 3; transmitting the second comparison result to the first controller 323; a first controller 323 for judging the operation state of the heating circuit 3 according to the second comparison result.
It should be noted that, the monitoring point adopted by the heating circuit detection module 30 is one end of the heating circuit 3, the heating circuit 3 may be regarded as a heater, when there is a current in the heater (i.e. heating), the obtained power voltage sampling value is 0V, and when the heater does not heat, the heating output end 3121 and the heating ground end 3122 in the heating circuit 3 are disconnected, and the obtained power voltage sampling value is 28V; in order to obtain a second comparison result capable of being output by the reference heating ground of 5V, a ground crossing transmission is required, the switch of the photoelectric coupler 321 is controlled through the heating output end 3121, and after the voltage sampling value and the preset voltage threshold value are obtained, a first signal is output to the second comparator 322, wherein the first signal is "0" or "1", and the second comparator 322 is adopted to perform comparison at the heating ground 3122, so as to determine the working state of the heating circuit, that is, determine whether heating is being performed and whether heating is normal.
In some implementations, the heating circuit 3 may include a first heating sub-module 311, a second heating sub-module 312, an Indium tin oxide heating resistor 313, and a second controller 314, the second heating sub-module 312 including a heating output 3121 and a heating ground 3122, the first heating sub-module 311 being connected to the second heating sub-module 312 through an Indium tin-oxide (ITO) heating resistor 313, wherein:
the first heating sub-module 311 is configured to receive a first heating signal, where the first heating signal is used to control the first heating sub-module 311 to be turned on; the second heating sub-module 312 is configured to receive a second heating signal, where the second heating signal is used to control the second heating sub-module 312 to be turned on; the tin oxide heating resistor 313 is configured to receive the current input into the tin oxide heating resistor 313 and control the current to flow to the heating ground 3122 when the first heating sub-module 311 and the second heating sub-module 312 are both in a conductive state; the second controller is configured to send a first heating signal to the first heating sub-module 311 and send a second heating signal 312 to the second heating sub-module when the ambient temperature is lower than a preset temperature threshold, and control the heating output terminal to be connected to the heating ground 3122 when the first heating sub-module 311 and the second heating sub-module 312 are in a conductive state.
The heating circuit 3 is mainly used to heat the liquid crystal panel, so as to improve the performance of the liquid crystal panel when the ambient temperature is low. Specifically, a heating glass is stuck on the surface of the liquid crystal panel, an ITO layer is plated on the heating glass, and the ITO layer is electrified to generate heat.
As an example, when the ambient temperature is lower than the preset temperature threshold (e.g., 10 ℃), the second controller 322 sends a first heating signal (e.g., a heater_protector signal) to the first heating sub-module 311 to pull down pin No. 2 of the first photo-coupler (e.g., GH 3202J), so that pins 3 and 4 of the first photo-coupler are turned on, and further the P-channel MOS transistor (e.g., LYNM 130) is turned on, so that the output terminal (heater_1) of the first heating sub-module 311 can output current; the second controller 322 (for example, may be an FPGA) sends a second heating signal (for example, PWM wave, pwm_heater) to the second heating sub-module 312 to control pin 2 of the second photo coupler (for example, GH 3202J), and further control the conduction of the MOS transistor (for example, CSF 120), when the CSF120 is conducted, the heating output end 3121 (heat_2) of the second heating sub-module 312 is grounded to the heating ground end 3122 (heat_gnd), and current flows from the heat_1, through the ITO heating resistor, the heat_2 and the CSF120, and reaches the heat_gnd.
It should be noted that, a zener diode (e.g., 2CW18 VUR) is placed between the gate and the source of the MOS transistor (LYNM 130 and CSF 120), so as to limit the VGS (voltage of the gate to the source) of the MOS transistor from exceeding 18V, and avoid the MOS transistor from being damaged when a surge voltage occurs.
In other implementations, the second heating signal may be a second PWM signal, where the waveform duty cycle of the second PWM signal is used to control the heating temperature, and then the second controller 314 is further used to stop sending the first heating signal to the first heating sub-module 311 and stop sending the second heating signal to the second heating sub-module 312 when the ambient temperature is not lower than a preset temperature threshold (e.g., 10 ℃).
Fig. 5 is a schematic structural diagram of a power detection module 40 according to an embodiment of the present application, where the power detection module 40 includes a power detection sub-module 411 and a third comparator 422, and the following: a third comparator 422, configured to obtain a voltage value of the backlight circuit power supply, the heating circuit power supply, or the driving integrated circuit power supply, and obtain a third comparison result, where the third comparison result is used to characterize an operating state of the backlight circuit power supply, the heating circuit power supply, or the driving integrated circuit power supply; the power detection sub-module 411 is configured to obtain an operating state of the backlight circuit power supply, the heating circuit power supply, or the driving integrated circuit power supply according to the third comparison result.
It should be noted that, before the obtained voltage value is input to the third comparator 422, a chip may be used to perform analog-to-digital conversion on the obtained voltage value; in a specific implementation, the third comparator 422 may send the third comparison result to the controller of the power detection sub-module 422 through the serial peripheral interface (SerialPeripheralInterface, SPI).
Fig. 6 is a flow chart of a detection method provided in the present application. The method can be applied to a liquid crystal display, the liquid crystal display comprises a backlight circuit detection module 10 shown in fig. 2, the backlight circuit detection module is connected with a backlight circuit, the backlight circuit comprises a first comparator and an adjusting tube, the backlight circuit detection module comprises a pulse detection circuit, and a backlight circuit detection sub-module is connected with the pulse detection circuit, as shown in fig. 6, the method comprises:
s601: and obtaining a detection signal, wherein the detection signal comprises a first Pulse Width Modulation (PWM) signal of the input end of the first comparator, an output signal of the output end of the first comparator and a source electrode signal of the adjusting tube.
In some implementations, the process of obtaining the result signal may include: inputting the detection signal into a pulse detection circuit, and outputting a logic state of a result signal to be a low level if the waveform of the pulse detection circuit is unchanged within a preset time threshold; if the waveform of the pulse detection circuit changes within the preset time threshold, the logic state of the output result signal is high level.
In other implementations, before the detection signal is input to the pulse detection circuit, an adjustment instruction needs to be sent to the backlight circuit, where the adjustment instruction is used to instruct the first comparator to adjust the voltage values of the output signal and the source signal to a first preset interval.
S602: the detection signal is input into a pulse detection circuit to obtain a result signal.
S603: and determining the working state of the backlight circuit according to the result signal.
Therefore, by the method provided by the embodiment of the application, whether the backlight circuit of the liquid crystal display is normal or not can be rapidly and accurately determined, the detection accuracy and efficiency are improved, and the consumption of manpower and cost is reduced.
In addition, an embodiment of the present application further provides an electronic device 700, as shown in fig. 7, where the electronic device 700 includes a processor 701 and a memory 702:
the memory 702 is used for storing a computer program;
the processor 701 is configured to execute the method provided in fig. 6 according to the computer program.
Furthermore, the embodiment of the application also provides a computer readable storage medium for storing a computer program for executing the method provided by the embodiment of the application.
From the above description of embodiments, it will be apparent to those skilled in the art that all or part of the steps of the above described example methods may be implemented in software plus general hardware platforms. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which may be stored in a storage medium, such as a read-only memory (ROM)/RAM, a magnetic disk, an optical disk, or the like, including several instructions for causing a computer device (which may be a personal computer, a server, or a network communication device such as a router) to perform the methods described in the embodiments or some parts of the embodiments of the present application.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments for relevant points. The apparatus embodiments described above are merely illustrative, in which the modules illustrated as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the objective of the embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
The foregoing is merely a preferred embodiment of the present application and is not intended to limit the scope of the present application. It should be noted that several modifications and adaptations to the present application can be made by those skilled in the art without departing from the scope of the present application.
Claims (11)
1. The utility model provides a detection device, its characterized in that is applied to liquid crystal display, the device includes backlight circuit detection module, backlight circuit detection module connects backlight circuit, backlight circuit detection module includes pulse detection circuit and backlight circuit detection submodule, backlight circuit includes first comparator and adjusting tube, backlight circuit detection submodule with pulse detection circuit connects, wherein:
the backlight circuit detection submodule is used for acquiring detection signals, inputting the detection signals into the pulse detection circuit to obtain result signals, wherein the detection signals comprise a first Pulse Width Modulation (PWM) signal of the input end of the first comparator, an output signal of the output end of the first comparator and a source signal of the adjusting tube;
the pulse detection circuit is used for receiving the detection signal and outputting the result signal;
the backlight circuit detection submodule is further used for determining the working state of the backlight circuit according to the result signal.
2. The detection device according to claim 1, wherein the logic state of the resulting signal comprises a high level or a low level, the pulse detection circuit being specifically configured to:
the detection signal is received and the detection signal is received,
if the waveform of the pulse detection circuit is unchanged within the preset time threshold, outputting the logic state of the result signal to be low level;
and if the waveform of the pulse detection circuit is changed within the preset time threshold, outputting the logic state of the result signal to be high level.
3. The detection apparatus of claim 1, wherein the backlight circuit detection sub-module is further configured to:
and sending an adjustment instruction to the backlight circuit, wherein the adjustment instruction is used for instructing the first comparator to adjust the voltage values of the output signal and the source signal to a first preset interval.
4. The device of claim 1, further comprising a driver integrated circuit detection module coupled to the driver integrated circuit, the driver integrated circuit detection module configured to:
acquiring a return signal of an output end of the drive integrated circuit, and judging the display state of a liquid crystal panel of the liquid crystal display according to the return signal;
if the frequency of the return signal accords with a second preset interval, the output detection result is that the display of the liquid crystal panel is normal, and if the frequency of the return signal does not accord with the second preset interval, the output detection result is that the display of the liquid crystal panel is abnormal.
5. The device of claim 1, further comprising a heating circuit detection module coupled to the heating circuit, the heating circuit detection module comprising a photo coupler, a second comparator, and a first controller, the heating circuit comprising a heating output and a heating ground, wherein:
the photoelectric coupler is used for receiving the voltage sampling value of the heating output end, comparing the voltage sampling value with a preset voltage threshold value and outputting a first signal to the second comparator, wherein the logic state of the first signal comprises a high level or a low level;
the second comparator is used for comparing the voltage value of the heating ground terminal with the first signal to obtain a second comparison result, and the second comparison result is used for representing the working state of the heating circuit; transmitting the second comparison result to the first controller;
and the first controller is used for judging the working state of the heating circuit according to the second comparison result.
6. The detection apparatus according to claim 5, wherein the heating circuit includes a first heating sub-module, a second heating sub-module, an indium tin oxide heating resistor, and a second controller, the second heating sub-module includes the heating output terminal and the heating ground terminal, the first heating sub-module is connected to the second heating sub-module through the indium tin oxide heating resistor, wherein:
the first heating submodule is used for receiving a first heating signal, and the first heating signal is used for controlling the first heating submodule to be conducted;
the second heating submodule is used for receiving a second heating signal, and the second heating signal is used for controlling the second heating submodule to be conducted;
the heating resistor of the smoke tin oxide is used for receiving the current input into the heating resistor of the smoke tin oxide and controlling the current to flow to the heating ground terminal when the first heating sub-module and the second heating sub-module are in a conducting state;
the second controller is configured to send the first heating signal to the first heating submodule and send the second heating signal to the second heating submodule when the ambient temperature is lower than a preset temperature threshold, and control the heating output end to be connected with the heating ground end when the first heating submodule and the second heating submodule are in a conducting state.
7. The detection apparatus according to claim 6, wherein the second heating signal is a second PWM signal, a waveform duty cycle of the second PWM signal is used to control a heating temperature, and the second controller is further configured to:
and stopping sending the first heating signal to the first heating submodule and stopping sending the second heating signal to the second heating submodule when the ambient temperature is not lower than the preset temperature threshold.
8. The detection apparatus according to claim 1, wherein the liquid crystal display includes a backlight circuit power supply, a heating circuit power supply, and a driving integrated circuit power supply, the apparatus further comprising a power detection module including a power detection sub-module and a third comparator, wherein:
the third comparator is configured to obtain a voltage value of the backlight circuit power supply, the heating circuit power supply, or the driving integrated circuit power supply, and obtain a third comparison result, where the third comparison result is used to characterize a working state of the backlight circuit power supply, the heating circuit power supply, or the driving integrated circuit power supply;
the power supply detection sub-module is configured to obtain a working state of the backlight circuit power supply, the heating circuit power supply or the driving integrated circuit power supply according to the third comparison result.
9. The detection method is characterized by being applied to a liquid crystal display, wherein the liquid crystal display comprises a backlight circuit detection module, the backlight circuit detection module is connected with a backlight circuit, the backlight circuit detection module comprises a pulse detection circuit and a backlight circuit detection sub-module, the backlight circuit comprises a first comparator and an adjusting tube, and the backlight circuit detection sub-module is connected with the pulse detection circuit, and the method comprises the following steps:
acquiring a detection signal, wherein the detection signal comprises a first Pulse Width Modulation (PWM) signal of the input end of the first comparator, an output signal of the output end of the first comparator and a source signal of the adjusting tube;
inputting the detection signal into the pulse detection circuit to obtain a result signal;
and determining the working state of the backlight circuit according to the result signal.
10. An electronic device, the electronic device comprising a processor and a memory:
the memory is used for storing a computer program;
the processor is configured to perform the method of claim 9 in accordance with the computer program.
11. A computer readable storage medium, characterized in that the computer readable storage medium is for storing a computer program for executing the method of claim 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118227403A (en) * | 2024-05-23 | 2024-06-21 | 上海泰矽微电子有限公司 | SPI communication conflict detection circuit and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118227403A (en) * | 2024-05-23 | 2024-06-21 | 上海泰矽微电子有限公司 | SPI communication conflict detection circuit and method |
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