CN110930914A - Signal detection circuit, signal detection method and display device - Google Patents
Signal detection circuit, signal detection method and display device Download PDFInfo
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- CN110930914A CN110930914A CN201911304073.9A CN201911304073A CN110930914A CN 110930914 A CN110930914 A CN 110930914A CN 201911304073 A CN201911304073 A CN 201911304073A CN 110930914 A CN110930914 A CN 110930914A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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Abstract
The invention provides a signal detection circuit, a signal detection method and a display device, and relates to the technical field of display. The signal detection circuit is arranged and comprises a switch circuit module, an analog-to-digital conversion module and a control module, wherein the switch circuit module is connected between at least one differential signal line and a corresponding load in parallel, the control module controls the switch circuit module to be conducted, a first differential signal transmitted on a specified differential signal line is input to the analog-to-digital conversion module, the analog-to-digital conversion module collects the first differential signal and outputs a second differential signal to the control module, and the second differential signal is analyzed based on the control module to determine whether the first differential signal is abnormal or not, so that the first differential signal transmitted by the specified differential signal line is detected.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a signal detection circuit, a signal detection method, and a display device.
Background
A main board of a Mobile communication device and a Mobile communication display panel driver IC (Integrated Circuit) are usually connected by a differential signal line, such as an MIPI (Mobile Industry Processor Interface) differential signal line, to implement transmission of a differential signal.
At present, in order to detect the differential signal transmitted on the differential signal line, a testing device (such as an oscilloscope) is usually used to connect a testing probe to detect the differential signal line, but the size of the testing probe is millimeter level, and the size of the differential signal line is micrometer level, so it is difficult to accurately detect the differential signal transmitted on the differential signal line by using the testing probe, and therefore, in order to detect the differential signal transmitted on the differential signal line by using the testing probe, it is necessary to increase the size of the differential signal line, perform perforation layer change processing on the differential signal line, perform copper exposure processing on the differential signal line, or the like.
However, at present, in order to detect the differential signal transmitted by the differential signal line by using the test probe, the mode of the differential signal line is changed, and other interference factors are likely to be introduced, which affects the accuracy of the differential signal detection result.
Disclosure of Invention
The invention provides a signal detection circuit, a signal detection method and a display device, which are used for solving the problem that the accuracy of a detection result is not high when a test probe is adopted to detect a differential signal transmitted by a differential signal wire by changing the differential signal wire in the prior art.
In order to solve the above problem, the present invention discloses a signal detection circuit, comprising: the switch circuit module is connected between at least one differential signal line and a corresponding load in parallel;
the switch circuit module is respectively connected with the control module and the analog-to-digital conversion module, and is configured to be conducted under the control of the control module so as to input a first differential signal transmitted on a designated differential signal line in the at least one differential signal line to the analog-to-digital conversion module;
the analog-to-digital conversion module is connected with the control module and configured to perform analog-to-digital conversion on the first differential signal, output a second differential signal and send the second differential signal to the control module;
the control module is configured to detect whether the first differential signal transmitted on the designated differential signal line is abnormal or not according to the second differential signal.
Optionally, the control module includes a judgment sub-module, a first determination sub-module and a second determination sub-module;
the judgment submodule is configured to judge whether the signal parameter of the second differential signal is within a preset parameter range;
the first determining submodule is configured to determine that the first differential signal transmitted on the designated differential signal line is normal when the signal parameter of the second differential signal is within the preset parameter range;
the second determining submodule is configured to determine that the first differential signal transmitted on the designated differential signal line is abnormal when the signal parameter of the second differential signal is outside the preset parameter range.
Optionally, the signal detection circuit further includes a signal conditioning module, and the signal conditioning module is connected in series between the at least one differential signal line and the corresponding load; the control module comprises an adjusting signal generating submodule;
the adjusting signal generating submodule is connected with the signal adjusting module and is configured to generate an adjusting signal according to the second differential signal when the first differential signal is abnormal and send the adjusting signal to the signal adjusting module;
the signal conditioning module is configured to condition the first differential signal transmitted on the designated differential signal line according to the conditioning signal.
Optionally, the signal conditioning module includes a first amplifier and a second amplifier, and the designated differential signal line includes a first signal line and a second signal line;
a first input end of the first amplifier is connected with the first signal line, a second input end of the first amplifier is connected with the adjusting signal generating submodule, and an output end of the first amplifier is connected with the load;
the first input end of the second amplifier is connected with the second signal line, the second input end of the second amplifier is connected with the adjusting signal generating submodule, and the output end of the second amplifier is connected with the load.
Optionally, the signal detection circuit further includes an isolation module;
the isolation module is connected in series between the switch circuit module and the analog-to-digital conversion module and configured to isolate the second differential signal from the differential signal transmitted to the corresponding load through the at least one differential signal line.
Optionally, the signal detection circuit further includes a register module;
the register module is connected with the analog-to-digital conversion module and configured to store the second differential signal output by the analog-to-digital conversion module.
In order to solve the above problem, the present invention also discloses a signal detection method applied to the above signal detection circuit, the method comprising:
controlling the switch circuit module to be conducted so as to input a first differential signal transmitted on a designated differential signal line in at least one differential signal line into the analog-to-digital conversion module;
and receiving a second differential signal output by the analog-to-digital conversion module, and detecting whether the first differential signal transmitted on the appointed differential signal line is abnormal or not according to the second differential signal.
Optionally, the step of detecting whether the first differential signal transmitted on the designated differential signal line is abnormal according to the second differential signal includes:
judging whether the signal parameter of the second differential signal is within a preset parameter range;
when the signal parameter of the second differential signal is within the preset parameter range, determining that the first differential signal transmitted on the appointed differential signal line is normal;
and when the signal parameter of the second differential signal is out of the preset parameter range, determining that the first differential signal transmitted on the appointed differential signal line is abnormal.
Optionally, after the step of detecting whether the first differential signal transmitted on the designated differential signal line is abnormal according to the second differential signal, the method further includes:
when the first differential signal is abnormal, an adjusting signal is generated according to the second differential signal, and the adjusting signal is sent to a signal adjusting module, so that the signal adjusting module adjusts the first differential signal transmitted on the appointed differential signal line according to the adjusting signal.
In order to solve the above problem, the present invention further discloses a display device including the signal detection circuit.
Compared with the prior art, the invention has the following advantages:
by arranging the signal detection circuit, a switch circuit module in the signal detection circuit is connected between at least one differential signal line and a corresponding load in parallel, on-off of a detection branch circuit is controlled based on the switch circuit module, under the condition that the detection branch circuit corresponding to the specified differential signal line is conducted, a first differential signal on the specified differential signal line can be collected based on an analog-to-digital conversion module in the signal detection circuit, a second differential signal is output to a control module in the signal detection circuit, the second differential signal is analyzed based on the control module to determine whether the first differential signal is abnormal or not, so that the first differential signal transmitted by the specified differential signal line is detected, and therefore, the specified differential signal line does not need to be subjected to processing such as copper exposure, perforation layer changing, size increasing and the like, and the accuracy of a detection result is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a signal detection circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another signal detection circuit according to an embodiment of the present invention;
FIG. 3 shows a circuit diagram of a signal conditioning module of an embodiment of the present invention;
FIG. 4 shows a flow chart of a signal detection method of an embodiment of the present invention;
FIG. 5 illustrates a flow chart of the operation of a control module in accordance with an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
Referring to fig. 1, there is shown a signal detection circuit of an embodiment of the present invention, including: the device comprises a switch circuit module 11, an analog-to-digital conversion module 12 and a control module 13, wherein the switch circuit module 11 is connected between at least one differential signal line 21 and a corresponding load 22 in parallel.
The switch circuit module 11 is respectively connected with the control module 13 and the analog-to-digital conversion module 12, and is configured to be turned on under the control of the control module 13 so as to input a first differential signal transmitted on a designated differential signal line of the at least one differential signal line 21 to the analog-to-digital conversion module 12; the analog-to-digital conversion module 12 is connected with the control module 13, and is configured to perform analog-to-digital conversion on the first differential signal, output a second differential signal, and send the second differential signal to the control module 13; and a control module 13 configured to detect whether the first differential signal transmitted on the designated differential signal line is abnormal or not, based on the second differential signal.
It should be noted that the differential signal line 21 may be an MIPI differential signal line, and compared with the conventional parallel port transmission, the MIPI differential signal line has the advantages of fast transmission rate, large transmission data volume, low power consumption, and good interference resistance.
In the actual design process, two ends of the differential signal line 21 are respectively connected with the main board and the driving chip, the driving chip is further connected with the display panel, the main board sends image data to the driving chip through the differential signal line 21 according to a fixed frequency, the driving chip receives the image data sent by the main board, decodes the received image data to generate data voltages of three primary colors of RGB, and writes the generated data voltages into pixels of the display panel through the data line to realize refreshing of a picture displayed by the display panel. Therefore, the load 22 in fig. 1 is actually a display panel to which a driving chip is connected.
As shown in fig. 1, the differential signal lines 21 respectively include a D0 differential signal line, a CLK differential signal line, a Dn differential signal line, and the like, each differential signal line 21 includes two signal lines, and signals on the two differential signal lines are equal and opposite signals, so D0+ and D0-respectively represent the two signal lines included in the D0 differential signal line, CLK + and CLK-respectively represent the two signal lines included in the CLK differential signal line, and Dn + and Dn-respectively represent the two signal lines included in the Dn differential signal line.
By additionally adding a signal detection circuit in the display device, a switch circuit module 11 in the signal detection circuit is connected in parallel between at least one differential signal line 21 and a corresponding load 22, the switch circuit module 11 is respectively connected with a control module 13 and an analog-to-digital conversion module 12, the control module 13 can control the switch circuit module 11 to be conducted, so that a detection branch between a designated differential signal line in the at least one differential signal line 21 and the analog-to-digital conversion module 12 is conducted, and a first differential signal transmitted on the designated differential signal line is input to the analog-to-digital conversion module 12; the analog-to-digital conversion module 12 can acquire a first differential signal transmitted on a designated differential signal line, because the first differential signal is an analog signal, the analog-to-digital conversion module 12 can also perform analog-to-digital conversion on the acquired first differential signal and output the first differential signal to obtain a second differential signal, because the analog-to-digital conversion module 12 is also connected with the control module 13, the analog-to-digital conversion module 12 can send the second differential signal to the control module 13; the control module 13 receives the second differential signal output by the analog-to-digital conversion module 12, and then detects whether the first differential signal transmitted on the designated differential signal line is abnormal or not according to the second differential signal.
For example, the control module 13 controls the switch circuit module 11 to be turned on, so that a detection branch between a designated differential signal line CLK in the at least one differential signal line 21 and the analog-to-digital conversion module 12 is turned on, and the differential signal line D0 and a detection branch between the differential signal line Dn and the analog-to-digital conversion module 12 are not turned on, the analog-to-digital conversion module 12 may collect a first differential signal transmitted on the designated differential signal line CLK, perform analog-to-digital conversion on the first differential signal, output a second differential signal, and send the second differential signal to the control module 13, and the control module 13 detects whether the first differential signal transmitted on the designated differential signal line CLK is abnormal according to the second differential signal.
Only the first differential voltage transmitted on one differential signal line 21 can be detected at a time, at this time, the control module 13 controls the switch circuit module 11, so that the detection branch between the one differential signal line 21 and the analog-to-digital conversion module 12 is conducted, and the detection branches between the other differential signal lines 21 and the analog-to-digital conversion module 12 are not conducted; the first differential voltages transmitted on the plurality of differential signal lines 21 may also be detected at a time, and at this time, the control module 13 controls the switch circuit module 11 to make the detection branches between the plurality of differential signal lines 21 and the analog-to-digital conversion module 12 conductive.
The on-off of the switch circuit module 11 is controlled through the control module 13, so that the on-off of a detection branch between the appointed differential signal line and the analog-to-digital conversion module 12 is controlled, under the condition that the detection branch corresponding to the appointed differential signal line is conducted, a first differential signal on the appointed differential signal line can be collected based on the analog-to-digital conversion module 12, a second differential signal is output to the control module 13, the second differential signal is analyzed based on the control module 13 to determine whether the first differential signal is abnormal, and therefore the detection of the first differential signal transmitted on the appointed differential signal line is realized, therefore, the appointed differential signal line does not need to be subjected to copper exposure, perforation layer changing, size increasing and other processing, and the accuracy of a detection result is greatly improved.
It should be noted that the switch circuit module 11 may include a plurality of transistors, and the number of the transistors is equal to 2 times of the number of the differential signal lines 21, that is, each differential signal line 21 connects two transistors; specifically, the two transistors are respectively a first transistor and a second transistor, each differential signal line includes a first signal line and a second signal line, a gate of the first transistor is connected to the control module 13, a first pole of the first transistor is connected to a first signal line in the differential signal lines 21, a second pole of the first transistor is connected to the analog-to-digital conversion module 12, a gate of the second transistor is connected to the control module 13, a second pole of the second transistor is connected to a second signal line in the differential signal lines 21, and a first pole of the second transistor is connected to the analog-to-digital conversion module 12. The first transistor may be an N-type transistor, the second transistor may be a P-type transistor, the first electrode is a source electrode, and the second electrode is a drain electrode.
When a first differential signal transmitted on a designated differential signal line needs to be detected, the control module 13 controls the transistors connected with the designated differential signal line to be turned on, that is, the control module 13 inputs a high level signal to the first transistor connected with the first signal line in the designated differential signal line, so that the first transistor is turned on, and at the same time, the control module 13 inputs a low level signal to the second transistor connected with the second signal line in the designated differential signal line, so that the second transistor is also turned on, and at this time, the analog-to-digital conversion module 12 can acquire the differential signal transmitted on the first signal line and the second signal line in the designated differential signal line.
Specifically, the switch circuit module 11 is connected in parallel to an intersection position K between at least one differential signal line 21 and the corresponding load 22, and the intersection position K is closer to the load 22 relative to the main board, so that a difference between a differential signal actually input to the load 22 and a differential signal detected by the signal detection circuit is small, and accuracy of differential signal detection is further improved.
In the embodiment of the present invention, the control module 13 includes a judgment sub-module, a first determination sub-module and a second determination sub-module; the judging submodule is configured to judge whether the signal parameter of the second differential signal is within a preset parameter range; a first determination submodule configured to determine that the first differential signal transmitted on the designated differential signal line is normal when the signal parameter of the second differential signal is within a preset parameter range; a second determination submodule configured to determine that the first differential signal transmitted on the designated differential signal line is abnormal when the signal parameter of the second differential signal is outside the preset parameter range.
The preset parameter range is determined in advance according to an experiment, and the preset parameter range refers to an interval where the signal parameter of the second differential signal that can meet the actual demand is located, and when the second differential signal is located within the preset parameter range, the load 22 connected to the designated differential signal line is in a low power consumption state.
After receiving the second differential signal output by the analog-to-digital conversion module 12, the control module 13 extracts a signal parameter of the second differential signal, and determines whether the signal parameter of the second differential signal is within a preset parameter range through a determination submodule in the control module 13; when the signal parameter of the second differential signal is within the preset parameter range, the first determining submodule determines that the first differential signal transmitted on the designated differential signal line is normal, that is, the load 22 connected with the designated differential signal line is in a low power consumption state, and at this time, the first differential signal transmitted to the load 22 by the designated differential signal line meets the requirement; when the signal parameter of the second differential signal is outside the preset parameter range, the second determining submodule determines that the first differential signal transmitted on the designated differential signal line is abnormal, that is, the load 22 connected to the designated differential signal line is in a higher power consumption state, and at this time, the first differential signal transmitted to the load 22 by the designated differential signal line does not meet the requirement.
Wherein, the signal parameter of the second differential signal can be at least one of voltage, current, duty ratio and climbing time.
Referring to fig. 2, a schematic structural diagram of another signal detection circuit according to an embodiment of the present invention is shown.
In the embodiment of the present invention, the signal detection circuit further includes a signal conditioning module 14, where the signal conditioning module 14 is connected in series between at least one differential signal line 21 and a corresponding load 22; the control module 13 comprises an adjustment signal generation submodule; the adjusting signal generating submodule is connected with the signal adjusting module 14 and is configured to generate an adjusting signal according to the second differential signal when the first differential signal is abnormal and send the adjusting signal to the signal adjusting module 14; and a signal conditioning module 14 configured to condition the first differential signal transmitted on the designated differential signal line according to the conditioning signal.
When the control module 13 detects that the first differential signal transmitted on the designated differential signal line is abnormal, the adjustment signal generation submodule in the control module 13 generates an adjustment signal according to the second differential signal, and sends the adjustment signal to the signal adjustment module 14, and the signal adjustment module 14 adjusts the first differential signal transmitted on the designated differential signal line according to the adjustment signal, so that the finally adjusted first differential signal is normal.
Specifically, the first differential signal may be adjusted by the signal detection circuit for multiple times, and the signal parameter of the first differential signal after each adjustment gradually increases or gradually decreases. When the first differential signal acquired for the first time is abnormal, generating a first adjusting signal, and performing first adjustment on the first differential signal based on the first adjusting signal; acquiring the first differential signal after the first adjustment for the second time, generating a second adjustment signal when the first differential signal acquired for the second time is abnormal, and adjusting the first differential signal for the second time based on the second adjustment signal; and the rest is repeated until the finally acquired first differential signal is normal, and the signal parameters of the subsequently acquired first differential signal are gradually increased or gradually reduced relative to the signal parameters of the previously acquired first differential signal.
For example, when the signal parameter of the second differential signal is a voltage, the preset parameter range includes an upper voltage limit and a lower voltage limit, and if the voltage of the second differential signal is lower than the lower voltage limit, the control module 13 may control the signal conditioning module 14 to gradually increase the voltage of the first differential signal until the voltage of the second differential signal is between the upper voltage limit and the lower voltage limit; if the voltage of the second differential signal is higher than the upper voltage limit, the control module 13 may control the signal adjusting module 14 to gradually decrease the voltage of the first differential signal until the voltage of the second differential signal is between the upper voltage limit and the lower voltage limit. When the signal parameter of the second differential signal is the climbing time, the preset parameter range includes an upper value of the climbing time and a lower value of the climbing time, and if the climbing time of the second differential signal is greater than the upper value of the climbing time, the control module 13 may control the signal adjusting module 14 to gradually increase the driving capability of the differential signal line so as to gradually decrease the climbing time of the first differential signal until the climbing time of the second differential signal is between the upper value of the climbing time and the lower value of the climbing time; if the rising time of the second differential signal is smaller than the rising time lower limit, the control module 13 may control the signal adjusting module 14 to gradually decrease the driving capability of the differential signal line, so as to gradually increase the rising time of the first differential signal until the rising time of the second differential signal is between the rising time upper limit and the rising time lower limit.
When the first differential signal adjusted by the signal adjusting module 14 is normal, the adjusting signal generated by the control module 13 can be acquired, the adjusting signal and the original second differential signal are analyzed, and the manufacturing parameters of the device in the actual product are adjusted, so that the differential signal transmitted on the differential signal line in the device manufactured finally is normal.
Therefore, the first differential signal is automatically adjusted according to the adjusting module 14, so that the adjusted first differential signal can enable the load 12 to be in a lower power consumption state, the reason causing the first differential signal to be bad can be analyzed based on the adjusting signal, and the problem of the bad problem is solved, so that the time and cost required for manually analyzing the first differential signal to be bad are greatly reduced, the differential signal transmitted on the differential signal line is enabled to be normal, the loss caused by the abnormal differential signal is reduced to the maximum extent, and the efficiency of the differential signal line transmission is improved. In addition, because the differential signal line can transmit high-frequency signals above 1GHz at a high rate, when the differential signals transmitted on the differential signal line are normal, the embodiment of the invention can meet the quality requirement of high-rate transmission of the high-frequency differential signals above 1 GHz.
Specifically, the signal conditioning module 14 is connected in series between at least one differential signal line 21 and a corresponding load 22, the signal conditioning module 14 is further connected to the switch circuit module 11, and an intersection point between the signal conditioning module 14 and the load 22 and the switch circuit module 11 is a point K.
It should be noted that, when the control module 13 detects that the first differential signal transmitted on the designated differential signal line is normal, the control module 11 is controlled to turn off, so that the detection branch between the designated differential signal line and the analog-to-digital conversion module 12 is disconnected.
As shown in fig. 3, the signal conditioning block 14 includes a first amplifier a1 and a second amplifier a2, and the designated differential signal lines include a first signal line and a second signal line; a first input terminal of the first amplifier a1 is connected to the first signal line, a second input terminal of the first amplifier a1 is connected to the adjustment signal generation submodule, and an output terminal of the first amplifier a1 is connected to the load 22; a first input of the second amplifier a2 is connected to the second signal line, a second input of the second amplifier a2 is connected to the adjustment signal generation submodule, and an output of the second amplifier a2 is connected to the load 22.
Dn + denotes a first signal line among the designated differential signal lines Dn, Dn-denotes a second signal line among the designated differential signal lines Dn, Fn + denotes a first feedback control line in which the adjustment signal generation submodule in the control module 13 is connected to the first amplifier a1, Fn-denotes a second feedback control line in which the adjustment signal generation submodule in the control module 13 is connected to the second amplifier a2, Dn + 'denotes a third signal line in which the first amplifier a1 is connected to the load 22, Dn-' denotes a fourth signal line in which the second amplifier a2 is connected to the load 22, and the third signal line Dn + 'and the fourth signal line Dn-' together constitute one differential signal line.
The differential signal transmitted by the third signal line Dn + 'and the fourth signal line Dn-' is a signal obtained by the signal adjusting module 14 adjusting the first differential signal input by the first signal line Dn + and the second signal line Dn-according to the adjusting signal sent by the control module 13. Specifically, the first amplifier a1 adjusts the signal inputted from the first signal line Dn + according to the adjustment signal inputted from the first feedback control line Fn +, the adjusted signal is inputted to the load 22 through the third signal line Dn + 'and the second amplifier a2 adjusts the signal inputted from the second signal line Dn-according to the adjustment signal inputted from the second feedback control line Fn-, and the adjusted signal is inputted to the load 22 through the fourth signal line Dn-'.
As shown in FIG. 3, the first power supply terminal of the first amplifier A1 is connected to a first power supply VDD, and the second power supply terminal of the first amplifier A1 is connected to a second power supply VSS; the first power supply terminal of the second amplifier a2 is connected to a first power supply VDD, and the second power supply terminal of the second amplifier a2 is connected to a second power supply VSS. The first power supply VDD receives a high level signal, and the second power supply VSS receives a low level signal.
It should be noted that the circuit shown in fig. 3 may adjust the voltage or the current of the first differential signal, so that the current and the voltage of the second differential signal obtained after adjustment are within a preset parameter range, and of course, the signal adjusting module 14 is not limited to the circuit shown in fig. 3, and may also adopt a resistor-capacitor device, a diode, a triode, and other devices to form a corresponding circuit, so as to implement the function of the signal adjusting module 14, that is, adjust the first differential signal transmitted on the designated differential signal line according to the adjustment signal.
In the embodiment of the present invention, as shown in fig. 2, the signal detection circuit further includes an isolation module 15; an isolation module 15, connected in series between the switch circuit module 11 and the analog-to-digital conversion module 12, configured to isolate the second differential signal from the differential signal transmitted to the corresponding load 22 through the at least one differential signal line 21.
When the switch circuit module 11 is turned on, the analog-to-digital conversion module 12 may output a second differential signal, at this time, the differential signal line 21 transmits a corresponding differential signal (which may include, in addition to the first differential signal transmitted on the designated differential signal line, the differential signals transmitted on the other differential signal lines) to the load 22, and the second differential signal interferes with the differential signal transmitted by the differential signal line 21 to the corresponding load 22, and therefore, an isolation module 15 is arranged in the signal detection circuit, the isolation module 15 is respectively connected with the switch circuit module 11 and the analog-to-digital conversion module 12, the isolation module 15 can be used to isolate the second differential signal from the differential signal transmitted to the corresponding load 22 through the at least one differential signal line 21, so that the second differential signal can be collected more accurately, and further, the detection result of the first differential signal transmitted on the appointed differential signal line is more accurate.
As shown in fig. 2, the signal detection circuit further includes a register block 16; and the register module 16 is connected to the analog-to-digital conversion module 12 and configured to store the second differential signal output by the analog-to-digital conversion module 12.
Specifically, the control module 13 controls the analog-to-digital conversion module 12, stores the second differential signal in the register module 16, and stores the second differential signal output by the analog-to-digital conversion module 12 each time, so that the second differential signal can be subsequently acquired from the register module 16, and the second differential signal is analyzed, thereby facilitating the analysis of the first differential signal.
In the embodiment of the invention, by arranging the signal detection circuit, the switch circuit module in the signal detection circuit is connected between at least one differential signal line and the corresponding load in parallel, the on-off of the detection branch circuit is controlled based on the switch circuit module, under the condition that the detection branch corresponding to the appointed differential signal line is conducted, a first differential signal on the appointed differential signal line can be collected based on an analog-to-digital conversion module in the signal detection circuit, and outputs the second differential signal to a control module in the signal detection circuit, analyzes the second differential signal based on the control module to determine whether the first differential signal is abnormal, therefore, the first differential signal transmitted by the appointed differential signal line is detected, and therefore, the appointed differential signal line does not need to be subjected to copper exposure, perforation layer changing, size increasing and the like, and the accuracy of a detection result is greatly improved.
Example two
Referring to fig. 4, a flowchart of a signal detection method according to an embodiment of the present invention is shown, which may specifically include the following steps:
In the embodiment of the present invention, the signal detection circuit includes a switch circuit module 11, an analog-to-digital conversion module 12, and a control module 13, the switch circuit module 11 is connected in parallel between at least one differential signal line 21 and a corresponding load 22, the switch circuit module 11 is further connected to the control module 13 and the analog-to-digital conversion module 12, and the analog-to-digital conversion module 12 is connected to the control module 13.
As shown in fig. 5, in the initial state, the signal detection circuit does not operate, the control module 13 executes step 51, and controls the switch circuit module 11 to be completely turned off, so that all the detection branches between the differential signal lines 21 and the analog-to-digital conversion module 12 are all turned off, at this time, the detection of the differential signals transmitted on the differential signal lines is not performed, and the differential signal lines normally input the differential signals to the load, and are in the default operating state; when the first differential signal transmitted on the designated differential line needs to be detected, the control module 13 executes step 52 to control the switch circuit module 11 to be turned on, so as to input the first differential signal transmitted on the designated differential signal line in the at least one differential signal line to the analog-to-digital conversion module 12, specifically, when step 52 is executed, not all devices in the switch circuit module 11 are turned on, but only the devices connected with the designated differential signal line are turned on, and the analog-to-digital conversion module 12 may collect the first differential signal transmitted on the designated differential signal line, perform analog-to-digital conversion on the collected first differential signal, and output to obtain the second differential signal.
In the embodiment of the present invention, after the analog-to-digital conversion module 12 outputs the obtained second differential signal, the second differential signal is sent to the control module 13, as shown in fig. 5, the control module 13 executes step 53, receives the second differential signal output by the analog-to-digital conversion module 12, and detects whether the first differential signal transmitted on the designated differential signal line is abnormal according to the second differential signal.
Specifically, step 402 may include: judging whether the signal parameter of the second differential signal is within a preset parameter range; when the signal parameter of the second differential signal is within the preset parameter range, determining that the first differential signal transmitted on the appointed differential signal line is normal; and when the signal parameter of the second differential signal is out of the preset parameter range, determining that the first differential signal transmitted on the appointed differential signal line is abnormal.
After receiving the second differential signal output by the analog-to-digital conversion module 12, the control module 13 extracts a signal parameter of the second differential signal, and determines whether the signal parameter of the second differential signal is within a preset parameter range; when the signal parameter of the second differential signal is within the preset parameter range, determining that the first differential signal transmitted on the designated differential signal line is normal, that is, the load 22 connected to the designated differential signal line is in a low power consumption state, and at this time, the first differential signal transmitted to the load 22 by the designated differential signal line meets the requirement; when the signal parameter of the second differential signal is outside the preset parameter range, it is determined that the first differential signal transmitted on the designated differential signal line is abnormal, that is, the load 22 connected to the designated differential signal line is in a higher power consumption state, and at this time, the first differential signal transmitted to the load 22 by the designated differential signal line does not meet the requirement.
After step 402, further comprising: when the first differential signal is abnormal, an adjusting signal is generated according to the second differential signal, and the adjusting signal is sent to a signal adjusting module, so that the signal adjusting module adjusts the first differential signal transmitted on the appointed differential signal line according to the adjusting signal.
The signal detection circuit is further provided with a signal conditioning module 14, the signal conditioning module 14 is connected in series between at least one differential signal line 21 and a corresponding load 22, when the control module 13 detects that a first differential signal transmitted on a designated differential signal line is abnormal, as shown in fig. 5, the control module 13 executes step 54, generates a conditioning signal according to a second differential signal, and sends the conditioning signal to the signal conditioning module 14, so that the signal conditioning module 14 conditions the first differential signal transmitted on the designated differential signal line according to the conditioning signal, so that the finally conditioned first differential signal is normal.
As shown in fig. 5, when the control module 13 detects that the first differential signal transmitted on the designated differential signal line is normal, the control module 13 executes step 55 to control the switch circuit module 11 to close, so that the detection branch between the designated differential signal line and the analog-to-digital conversion module 12 is disconnected.
The differential signals transmitted on any one or more of the differential signal lines other than the designated differential signal line may be detected or may not be detected, that is, the switch circuit module 11 is turned off completely, so as to turn off the signal detection circuit.
In the embodiment of the invention, by arranging the signal detection circuit, the switch circuit module in the signal detection circuit is connected between at least one differential signal line and the corresponding load in parallel, the on-off of the detection branch circuit is controlled based on the switch circuit module, under the condition that the detection branch corresponding to the appointed differential signal line is conducted, a first differential signal on the appointed differential signal line can be collected based on an analog-to-digital conversion module in the signal detection circuit, and outputs the second differential signal to a control module in the signal detection circuit, analyzes the second differential signal based on the control module to determine whether the first differential signal is abnormal, therefore, the first differential signal transmitted by the appointed differential signal line is detected, and therefore, the appointed differential signal line does not need to be subjected to copper exposure, perforation layer changing, size increasing and the like, and the accuracy of a detection result is greatly improved.
EXAMPLE III
The embodiment of the invention also provides a display device which comprises the signal detection circuit.
In addition, the display device further comprises a main board, a driving chip and a display panel, the main board is connected with the driving chip through a differential signal line 21, the driving chip is further connected with the display panel, a switch circuit module 11 in the signal detection circuit is connected between at least one differential signal line 21 and a corresponding load 22 (namely, the display panel connected with the driving chip) in parallel, the switch circuit module 11 is further connected with the control module 13 and the analog-to-digital conversion module 12 respectively, and the analog-to-digital conversion module 12 is connected with the control module 13.
For a specific description of the signal detection circuit, reference may be made to the description of the first embodiment and the second embodiment, which is not repeated herein in this embodiment of the present invention.
In the embodiment of the invention, by arranging the signal detection circuit, the switch circuit module in the signal detection circuit is connected between at least one differential signal line and the corresponding load in parallel, the on-off of the detection branch circuit is controlled based on the switch circuit module, under the condition that the detection branch corresponding to the appointed differential signal line is conducted, a first differential signal on the appointed differential signal line can be collected based on an analog-to-digital conversion module in the signal detection circuit, and outputs the second differential signal to a control module in the signal detection circuit, analyzes the second differential signal based on the control module to determine whether the first differential signal is abnormal, therefore, the first differential signal transmitted by the appointed differential signal line is detected, and therefore, the appointed differential signal line does not need to be subjected to copper exposure, perforation layer changing, size increasing and the like, and the accuracy of a detection result is greatly improved.
For simplicity of explanation, the foregoing method embodiments are described as a series of acts or combinations, but it should be understood by those skilled in the art that the present invention is not limited by the order of acts or acts described, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The signal detection circuit, the signal detection method and the display device provided by the invention are described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A signal detection circuit, comprising: the switch circuit module is connected between at least one differential signal line and a corresponding load in parallel;
the switch circuit module is respectively connected with the control module and the analog-to-digital conversion module, and is configured to be conducted under the control of the control module so as to input a first differential signal transmitted on a designated differential signal line in the at least one differential signal line to the analog-to-digital conversion module;
the analog-to-digital conversion module is connected with the control module and configured to perform analog-to-digital conversion on the first differential signal, output a second differential signal and send the second differential signal to the control module;
the control module is configured to detect whether the first differential signal transmitted on the designated differential signal line is abnormal or not according to the second differential signal.
2. The signal detection circuit of claim 1, wherein the control module includes a judgment sub-module, a first determination sub-module and a second determination sub-module;
the judgment submodule is configured to judge whether the signal parameter of the second differential signal is within a preset parameter range;
the first determining submodule is configured to determine that the first differential signal transmitted on the designated differential signal line is normal when the signal parameter of the second differential signal is within the preset parameter range;
the second determining submodule is configured to determine that the first differential signal transmitted on the designated differential signal line is abnormal when the signal parameter of the second differential signal is outside the preset parameter range.
3. The signal detection circuit of claim 1, further comprising a signal conditioning module connected in series between the at least one differential signal line and the corresponding load; the control module comprises an adjusting signal generating submodule;
the adjusting signal generating submodule is connected with the signal adjusting module and is configured to generate an adjusting signal according to the second differential signal when the first differential signal is abnormal and send the adjusting signal to the signal adjusting module;
the signal conditioning module is configured to condition the first differential signal transmitted on the designated differential signal line according to the conditioning signal.
4. The signal detection circuit of claim 3, wherein the signal conditioning module comprises a first amplifier and a second amplifier, and the designated differential signal line comprises a first signal line and a second signal line;
a first input end of the first amplifier is connected with the first signal line, a second input end of the first amplifier is connected with the adjusting signal generating submodule, and an output end of the first amplifier is connected with the load;
the first input end of the second amplifier is connected with the second signal line, the second input end of the second amplifier is connected with the adjusting signal generating submodule, and the output end of the second amplifier is connected with the load.
5. The signal detection circuit of claim 1, further comprising an isolation module;
the isolation module is connected in series between the switch circuit module and the analog-to-digital conversion module and configured to isolate the second differential signal from the differential signal transmitted to the corresponding load through the at least one differential signal line.
6. The signal detection circuit of claim 1, further comprising a register module;
the register module is connected with the analog-to-digital conversion module and configured to store the second differential signal output by the analog-to-digital conversion module.
7. A signal detection method applied to the signal detection circuit according to any one of claims 1 to 6, the method comprising:
controlling the switch circuit module to be conducted so as to input a first differential signal transmitted on a designated differential signal line in at least one differential signal line into the analog-to-digital conversion module;
and receiving a second differential signal output by the analog-to-digital conversion module, and detecting whether the first differential signal transmitted on the appointed differential signal line is abnormal or not according to the second differential signal.
8. The method according to claim 7, wherein the step of detecting whether the first differential signal transmitted on the designated differential signal line is abnormal or not based on the second differential signal comprises:
judging whether the signal parameter of the second differential signal is within a preset parameter range;
when the signal parameter of the second differential signal is within the preset parameter range, determining that the first differential signal transmitted on the appointed differential signal line is normal;
and when the signal parameter of the second differential signal is out of the preset parameter range, determining that the first differential signal transmitted on the appointed differential signal line is abnormal.
9. The method according to claim 7, further comprising, after the step of detecting whether the first differential signal transmitted on the designated differential signal line is abnormal or not, based on the second differential signal:
when the first differential signal is abnormal, an adjusting signal is generated according to the second differential signal, and the adjusting signal is sent to a signal adjusting module, so that the signal adjusting module adjusts the first differential signal transmitted on the appointed differential signal line according to the adjusting signal.
10. A display device characterized by comprising the signal detection circuit according to any one of claims 1 to 6.
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| CN110930914B (en) | 2023-07-21 |
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