CN115762372A

CN115762372A - Driving signal detection method and device and display device

Info

Publication number: CN115762372A
Application number: CN202211317982.8A
Authority: CN
Inventors: 黄顾; 康报虹
Original assignee: HKC Co Ltd
Current assignee: HKC Co Ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-03-07

Abstract

The application provides a driving signal detection method, a driving signal detection device and a display device, wherein the driving signal detection method comprises the following steps: receiving a driving signal and a target characteristic value, wherein the driving signal is an analog signal; converting the driving signal into a high/low level signal based on a voltage value of a preset reference voltage signal; performing analog-to-digital conversion on the high/low level signals to obtain corresponding digital driving signals; detecting the characteristic value of the digital driving signal to obtain an actually measured characteristic value; the actually measured characteristic value comprises at least one of an actually measured period, an actually measured duty ratio and an actually measured phase; and comparing the actual measurement characteristic value of the digital driving signal with the target characteristic value, and outputting a corresponding comparison result to indicate the difference between the actual measurement characteristic value and the target characteristic value. The method provided by the application can automatically complete detection and comparison of the characteristic values of the driving signals, and is high in detection efficiency.

Description

Driving signal detection method and device and display device

Technical Field

The present disclosure relates to the field of display panels, and in particular, to a driving signal detection method and apparatus, and a display apparatus.

Background

At present, an LCD (Liquid Crystal Display) is a mainstream Display widely used in various industries, and the LCD has the advantages of thin appearance, light weight, and the like.

In order to reduce the production cost, the conventional liquid crystal display panel usually adopts a GDL (Gate Driver less) Circuit driving technology, i.e., a Gate driving Circuit of a horizontal scanning line is fabricated on the periphery of a display area of the display panel by an original array process, so as to replace an external Integrated Circuit (IC) to drive the horizontal scanning line. The number of input signals of such display panels is large, for example, pulse waveform signals such as a frame start signal STV, a clock signal CK, a low frequency signal LC, etc. during the debugging process, an engineer needs to check whether the debugged signal waveform meets the debugging requirement. In the prior art, an oscilloscope is usually adopted to display the waveform of a signal, and then an engineer observes and judges whether the waveform of the signal meets the requirement through eyes, so that the inspection method is time-consuming, labor-consuming and low in efficiency.

Disclosure of Invention

In view of the above, the present application is directed to a driving signal detecting method, a driving signal detecting device, and a display device, and aims to solve the problems of time consuming, labor consuming, and low efficiency of the conventional driving signal waveform detecting method.

The application provides a driving signal detection method, which comprises the following steps: receiving a driving signal and a target characteristic value, wherein the driving signal is an analog signal; converting the driving signal into a high/low level signal based on a voltage value of a preset reference voltage signal; performing analog-to-digital conversion on the high/low level signal to obtain a corresponding digital driving signal; detecting the characteristic value of the digital driving signal to obtain an actually measured characteristic value; the measured characteristic value comprises at least one of a measured period, a measured duty ratio and a measured phase, and the target characteristic value correspondingly comprises at least one of a target period, a target duty ratio and a target phase; and comparing the measured characteristic value of the digital driving signal with the target characteristic value, and outputting a corresponding comparison result to indicate a difference between the measured characteristic value and the target characteristic value.

The application provides a driving signal's detection method, through converting driving signal into high/low level signal, convert high/low level signal into digital type driving signal again to the eigenvalue of digital type driving signal detects and obtains actual measurement eigenvalue, and will digital type driving signal's actual measurement eigenvalue with the target eigenvalue is compared and is exported corresponding comparison result, can accomplish automatically and drive signal eigenvalue detection, comparison, and detection efficiency is high. In addition, before the drive signal is subjected to analog-to-digital conversion, the drive signal is converted into a high/low level signal, namely, the analog signal is converted into a standard square wave signal, so that the influence of burrs and jitter in the analog signal on the detection result can be removed, and the detection result is more accurate.

Optionally, the digital driving signal is a binary sequence arranged in time sequence, and the measured characteristic value of the digital driving signal includes a measured period. The detecting the characteristic value of the digital driving signal to obtain an actually measured characteristic value includes: judging whether an m-bit cycle data segment with cycle times reaching preset times exists in the digital driving signal; wherein the m-bit cycle data segment includes m-bit binary data arranged in series in the digital type driving signal; if m-bit cyclic data segments with the cycle times reaching the preset times exist in the digital driving signal, determining the actual measurement period of the digital driving signal according to the number m of the m-bit cyclic data segments; if m-bit cycle data sections with the cycle times reaching the preset times do not exist in the digital driving signal, taking m = m +1, and returning to judge whether m-bit cycle data sections with the cycle times reaching the preset times exist in the digital driving signal; wherein m has a starting value of 2.

Optionally, the target characteristic value comprises a target period. Comparing the measured characteristic value of the digital driving signal with the target characteristic value, and outputting a corresponding comparison result to indicate a difference between the measured characteristic value and the target characteristic value, includes: judging whether the difference value between the actual measurement period of the digital driving signal and the corresponding target period is smaller than or equal to a preset period error threshold value or not; if the difference value between the actual measurement period of the digital driving signal and the corresponding target period is smaller than or equal to the preset period error threshold value, outputting a first indicating signal to indicate that the actual measurement period of the driving signal meets the requirement; and if the difference value between the actual measurement period of the digital driving signal and the corresponding target period is larger than the preset period error threshold value, outputting a second indicating signal to indicate that the actual measurement period of the driving signal does not meet the requirement.

Optionally, the measured characteristic value of the digital driving signal further comprises a measured duty cycle. The detecting the characteristic value of the digital driving signal to obtain an actually measured characteristic value further comprises: if it is determined that there exists a loop data section of m number of cycles in the digital driving signal up to a preset number of cycles, and dividing the accumulated digit with the value of 1 in the m-digit cyclic data segment by the digit m to obtain the actually measured duty ratio of the digital driving signal.

Optionally, the target characteristic value further includes a target duty cycle. Comparing the measured characteristic value of the digital driving signal with the target characteristic value, and outputting a corresponding comparison result to indicate a difference between the measured characteristic value and the target characteristic value, includes: judging whether the difference value of the actually measured duty ratio of the digital driving signal and the corresponding target duty ratio is smaller than or equal to a preset duty ratio error threshold value or not; if the difference value between the actually measured duty ratio of the digital driving signal and the corresponding target duty ratio is smaller than or equal to the preset duty ratio error threshold value, outputting a third indicating signal to indicate that the actually measured duty ratio of the driving signal meets the requirement; and if the difference value between the actually measured duty ratio of the digital driving signal and the corresponding target duty ratio is larger than the preset duty ratio error threshold value, outputting a fourth indicating signal to indicate that the actually measured duty ratio of the driving signal does not meet the requirement.

Optionally, the driving signal is used for driving the display panel, and the driving signal includes a frame start signal, N clock signals, and at least one of two low frequency signals; wherein N is more than or equal to 1.

Optionally, the driving signal includes a frame start signal and N clock signals, the digital driving signal is a binary sequence arranged in time sequence, and the measured characteristic value of the digital driving signal includes a measured phase. The detecting the characteristic value of the digital driving signal to obtain an actually measured characteristic value includes: determining the moment corresponding to the first data bit with the value of 1 in the digital frame start signal corresponding to the frame start signal as a start moment; and determining the time length from the starting time to the time corresponding to the first data bit with the value of 1 in the digital clock signals corresponding to the clock signals as the actual measurement phase of each clock signal.

Optionally, the target characteristic value includes target phases, and each clock signal corresponds to one target phase. Comparing the measured characteristic value of the digital driving signal with the target characteristic value, and outputting a corresponding comparison result to indicate a difference between the measured characteristic value and the target characteristic value, includes: for each clock signal: judging whether the difference value of the actual measurement phase of the clock signal and the corresponding target phase is less than or equal to a preset phase error threshold value or not; if the difference value between the actually measured phase of the clock signal and the corresponding target phase is smaller than or equal to the preset phase error threshold value, outputting a fifth indicating signal to indicate that the actually measured phase of the driving signal meets the requirement; and if the difference value between the actually measured phase of the clock signal and the corresponding target phase is determined to be larger than the preset phase error threshold value, outputting a sixth indicating signal to indicate that the actually measured phase of the driving signal does not meet the requirement.

The present application also provides a driving signal detecting device, the driving signal detecting device includes: a processing unit and a plurality of signal conversion units. Each signal conversion unit is used for receiving a driving signal, converting the driving signal into a high/low level signal based on the voltage value of a preset reference voltage signal, and performing analog-to-digital conversion on the high/low level signal to obtain and output a corresponding digital driving signal. The processing unit is electrically connected with the signal conversion units respectively, and is used for receiving a target characteristic value corresponding to each driving signal and a digital driving signal output by the signal conversion units, detecting the characteristic value of each digital driving signal to obtain a corresponding actual measurement characteristic value, comparing the actual measurement characteristic value of the digital driving signal with the corresponding target characteristic value, and outputting a corresponding comparison result to indicate the difference between the actual measurement characteristic value and the corresponding target characteristic value; the measured characteristic value of each digital driving signal comprises at least one of a measured period, a measured duty ratio and a measured phase, and the target characteristic value of each digital driving signal correspondingly comprises at least one of a target period, a target duty ratio and a target phase.

The application also provides a display device, which comprises a display panel, a time sequence control unit, a signal optimization component and the driving signal detection device. The time sequence control unit is electrically connected with the driving signal detection device and the signal optimization component respectively, and the signal optimization component is also electrically connected with the display panel. The driving signal detection device is used for feeding back a difference value between an actually measured characteristic value and a target characteristic value of the digital driving signal to the time sequence control unit when detecting that the difference exists between the actually measured characteristic value and the target characteristic value of the digital driving signal; the time sequence control unit is used for outputting the difference value and the corresponding driving signal to the signal optimization component; the signal optimization component is used for carrying out compensation optimization on the driving signals according to the difference values to obtain optimized driving signals, and outputting the optimized driving signals to the display panel.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

Fig. 1 is a timing waveform diagram of driving signals provided in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a driving signal detection apparatus according to an embodiment of the present application.

Fig. 3 is a schematic circuit structure diagram of a signal conversion unit according to an embodiment of the present application.

Fig. 4 is a schematic flowchart of a driving signal detection method according to an embodiment of the present application.

Fig. 5 is a first detailed flowchart of

steps

640 and 650 in fig. 4.

Fig. 6 is a second detailed flowchart of

steps

640 and 650 in fig. 4.

Fig. 7 is a third detailed flowchart of

steps

640 and 650 in fig. 4.

Fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present application.

Description of the main element symbols:

display device 1

Drive signal detection device 10

Signal conversion unit 100

Processing unit 200

Human-computer interaction unit 300

Timing control unit 20

Signal optimization component 30

Display panel 40

Comparator U1

Analog-to-digital conversion unit 120

Crystal oscillator module SJT

Analog-to-digital converter 121

Steps 610-650, 641-646, 651-659

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present disclosure.

In the description of the present application, it is noted that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

A GOA (Gate Driver on array) type display panel usually includes a timing control unit and a GDL (Gate Driver less) unit. The GDL units are arranged on two sides of the display panel, and the time sequence control unit is used for outputting driving signals to the GDL units, so that the GDL units can start scanning lines in the display panel line by line, and the display panel is driven to display.

As shown in fig. 1, the driving signals output by the timing control unit include a Start Vertical (STV) signal, clock signals CK1 to CKN, a low frequency signal LC1, a low frequency signal LC2, and the like, and during the debugging process of the display panel, an engineer needs to check whether the waveform of the debugged signal meets the debugging requirement. In the prior art, an oscilloscope is usually adopted to display the waveform of a driving signal, and then an engineer determines whether the waveform of the driving signal meets requirements through eye observation, namely, whether characteristic values such as the period, duty ratio, phase and the like of the driving signal meet the requirements is checked, so that the checking method is time-consuming, labor-consuming and low in efficiency.

Referring to fig. 2-3 together, the problem of time and labor consuming and low efficiency of the conventional driving signal waveform detection method is solved. The embodiment of the application provides a driving signal detection device 10. The driving signal detecting device 10 is used for detecting whether the characteristic value of the signal meets the requirement, for example, the driving signal output by the timing control unit 20 can be detected. Specifically, the driving signal detecting device 10 includes a plurality of signal converting units 100, a processing unit 200, and a human-computer interaction unit 300.

Each signal conversion unit 100 is configured to receive a driving signal, convert the driving signal into a high/low level signal based on a voltage value of a preset reference voltage signal, perform analog-to-digital conversion on the high/low level signal, and output a corresponding digital driving signal. The driving signal comprises a frame start signal, N clock signals and at least one of two low-frequency signals, wherein N is larger than or equal to 1.

Specifically, as shown in fig. 3, each signal conversion unit 100 includes a comparator U1 and an analog-to-digital conversion unit 120.

The non-inverting input terminal of the comparator U1 is configured to receive a driving signal, and the inverting input terminal of the comparator U1 is configured to receive the preset reference voltage signal, for example, the preset reference voltage signal is electrically connected to a ground terminal GND through a resistor, and at this time, the voltage value of the preset reference voltage signal is zero. The positive power supply terminal of the comparator U1 is configured to receive a high level VDD, and the positive power supply terminal of the comparator U1 is configured to receive a low level VGND. The comparator is used for comparing the voltage value of the driving signal with the voltage value of a preset reference voltage signal to obtain a high/low level signal and outputting the high/low level signal. It will be appreciated that the drive signal is an analogue signal and the waveform may have glitches, jitter, i.e. not a standard square wave signal. If the analog signal is directly subjected to analog-to-digital conversion to obtain a digital signal, the digital signal is irregular, so that the detection error of the characteristic value is large, and even the characteristic value cannot be detected. The comparator U1 compares the driving signal with the preset reference voltage signal, and outputs a high/low level signal, which is a signal composed of a high level VDD and a low level VGND, i.e., a standard square wave signal.

The analog-to-digital conversion unit 120 is electrically connected to the output end of the comparator U1, and the analog-to-digital conversion unit 120 is configured to perform analog-to-digital conversion on the high/low level signal output by the comparator U1 to obtain and output a corresponding digital driving signal. Specifically, the analog-to-digital conversion unit 120 includes a crystal oscillator module SJT and an analog-to-digital converter 121. The crystal oscillator module SJT is configured to generate a pulse signal CLK and output the pulse signal CLK to the analog-to-digital converter 121, where a sampling frequency of the analog-to-digital converter 121 is a frequency of the pulse signal CLK, and in order to ensure accuracy of a detection result of a driving signal characteristic value, a frequency of the pulse signal CLK is preferably more than 10 times a frequency of a signal to be detected, for example, frequencies of the clock signals CK1 to CKN. The digital driving signals are binary sequences arranged according to time sequence.

The processing unit 200 is electrically connected to the plurality of signal conversion units 100 and the human-computer interaction unit 300, and the processing unit 200 is configured to receive a target characteristic value corresponding to each driving signal output by the human-computer interaction unit 300 and a digital driving signal output by the plurality of signal conversion units 100, detect a characteristic value of each digital driving signal to obtain a corresponding measured characteristic value, compare the measured characteristic value of the digital driving signal with the corresponding target characteristic value, and output a corresponding comparison result to the human-computer interaction unit 300 to indicate a difference between the measured characteristic value and the corresponding target characteristic value. The measured characteristic value of each digital driving signal comprises at least one of a measured period, a measured duty ratio and a measured phase, and the target characteristic value of each digital driving signal correspondingly comprises at least one of a target period, a target duty ratio and a target phase.

The human-computer interaction unit 300 includes an input unit and an output unit. The output unit is configured to receive a target characteristic value (e.g., a target period, a target duty cycle, and a target phase of each clock signal) corresponding to each driving signal input by a user and output the target characteristic value to the processing unit 200. The output unit is configured to receive the comparison result output by the processing unit 200, so as to show the difference between the actual measurement characteristic value of each driving signal and the corresponding target characteristic value to a user. Illustratively, the input unit may include, but is not limited to, one or more of a touch panel, a physical keyboard, function keys, a trackball, a mouse, a joystick, and the like. The output unit may include, but is not limited to, one or more of a touch panel, a display, a speaker, and the like.

Referring to fig. 4, based on the same inventive concept, the embodiment of the present application further provides a driving signal detection method, which can be applied to the driving signal detection apparatus 10, and the driving signal detection method specifically includes the following steps:

step 610, receiving a driving signal and a target characteristic value. Wherein the driving signal is an analog signal.

Step 620, converting the driving signal into a high/low level signal based on a voltage value of a preset reference voltage signal.

Step 630, performing analog-to-digital conversion on the high/low level signal to obtain a corresponding digital driving signal.

And step 640, detecting the characteristic value of the digital driving signal to obtain an actually measured characteristic value. The measured characteristic value comprises at least one of a measured period, a measured duty ratio and a measured phase, and the target characteristic value correspondingly comprises at least one of a target period, a target duty ratio and a target phase.

Step 650, comparing the measured characteristic value of the digital driving signal with the target characteristic value, and outputting a corresponding comparison result to indicate a difference between the measured characteristic value and the target characteristic value.

Referring to fig. 5, fig. 5 is a first flowchart of the

steps

640 and 650 in fig. 4. Wherein, steps 641 to 643 in fig. 5 are a detailed flow of step 640 in fig. 4, and steps 651 to 653 in fig. 5 are a detailed flow of step 650 in fig. 4.

Step 641, determining whether there exists an m-bit cyclic data segment in the digital driving signal, where the number of cycles reaches a preset number. Wherein the m-bit cycle data segment includes m-bit binary data arranged in series in the digital type driving signal. Wherein m has a starting value of 2. If it is determined that there is an m-bit cycle data segment in the digital driving signal, where the number of cycles reaches a preset number (e.g., 100), step 642 is executed, otherwise step 643 is executed. For example, taking the driving signal as the clock signal Ck1 in fig. 1 as an example, assuming that the voltage value of the high level VDD in the high/low level signals is 1, the voltage value of the low level VGND is 0, and the digital driving signal corresponding to the clock signal Ck1 is 00000001111100000 … 1111100000 … 1111100000 …, the cycle data segment is 1111100000, that is, m =10.

And 642, determining the actually measured period of the digital driving signal according to the bit number m of the m-bit cyclic data segment. Specifically, the actual measurement period of the digital type driving signal may be determined according to the sampling period of the analog-to-digital converter and the number m of bits of the cyclic data segment, for example, assuming that the sampling period of the analog-to-digital converter is 1ms, the actual measurement period T1=10 × 1ms =10ms.

In step 643, m = m +1 is taken, and the process returns to step 641, and it is determined again whether there is an m-bit cycle data segment in the digital driving signal, where the cycle number reaches the preset number. It is understood that in the embodiment of the present application, 2 is used as the starting value of m, that is, whether there are a 2-bit cycle data segment, a 3-bit cycle data segment, and a 4-bit cycle data segment … … in the digital driving signal in sequence is determined, and until it is determined that there is an m-bit cycle data segment in the digital driving signal, the step 643 is not executed.

Step 651, determining whether the difference between the measured period of the digital driving signal and the corresponding target period is less than or equal to a preset period error threshold. If the difference value between the measured period of the digital driving signal and the corresponding target period is determined to be less than or equal to the preset period error threshold, step 652 is executed, otherwise, step 653 is executed. Wherein the preset period error threshold is determined according to the detection precision of the driving signal detection device 10.

In step 652, a first indication signal is output. Wherein the first indication signal is used for indicating that the measured period of the driving signal meets the requirement.

In step 653, a second indication signal is output. Wherein the second indication signal is used for indicating that the measured period of the driving signal is not satisfactory. Optionally, the second indication signal may further include a measured period value of the driving signal, so that an engineer adjusts the period of the driving signal accordingly according to the measured period value.

Referring to fig. 6, fig. 6 is a second detailed flowchart of

steps

640 and 650 in fig. 4. Wherein, step 641, step 643 and step 644 in fig. 6 are the detailed flows of step 640 in fig. 4, and step 654 to step 656 in fig. 6 are the detailed flows of step 650 in fig. 4.

Step 641, determining whether there exists an m-bit cycle data segment in the digital driving signal, where the cycle number reaches a preset number. Wherein the m-bit cycle data segment includes m-bit binary data arranged in series in the digital type driving signal. Wherein m has a starting value of 2. If it is determined that there is an m-bit cycle data segment in the digital driving signal, where the number of cycles reaches a preset number, step 642 is executed, otherwise step 643 is executed.

And 644, dividing the accumulated digit with the value of 1 in the m-digit cyclic data segment by the digit m to obtain the actually measured duty ratio of the digital driving signal. For example, taking the driving signal as the clock signal Ck1 in fig. 1 as an example, assuming that the voltage value of the high level VDD in the high/low level signal is 1, the voltage value of the low level VGND is 0, the sampling period of the analog-to-digital converter is 1ms, and the digital driving signal corresponding to the clock signal Ck1 is 00000001111100000 … 1111100000 … 1111100000 …, then the cyclic data segment is 1111100000, i.e., m =10, the measured period T1=10 × 1ms =10ms of the clock signal Ck1, and the number of bits with a value of 1 in the cyclic data segment 1111100000 is 5, i.e., d1=10 × 1ms =10ms, so that the measured duty ratio of the clock signal Ck1 is =50%.

In step 643, m = m +1 is taken, and the process returns to step 641, and it is determined again whether there is an m-bit cycle data segment in the digital driving signal, where the cycle number reaches the preset number.

And step 654, judging whether the difference value between the actually measured duty ratio of the digital driving signal and the corresponding target duty ratio is less than or equal to a preset duty ratio error threshold value. If the difference value between the actually measured duty ratio of the digital driving signal and the corresponding target duty ratio is determined to be less than or equal to the preset duty ratio error threshold value, executing step 655, otherwise, executing step 656. Wherein the preset duty error threshold is determined according to the detection precision of the driving signal detection device 10.

Step 655, a third indication signal is output. Wherein the third indication signal is used for indicating that the measured duty cycle of the driving signal meets the requirement.

Step 656, outputting a fourth indication signal. Wherein the fourth indication signal is used for indicating that the measured duty cycle of the driving signal is not satisfactory. Optionally, the fourth indication signal may further include a measured duty cycle value of the driving signal, so that an engineer adjusts the duty cycle of the driving signal accordingly according to the measured duty cycle value.

Referring to fig. 7, fig. 7 is a third flowchart of the

steps

640 and 650 in fig. 4. Wherein, steps 645 to 646 in fig. 7 are the refinement flow of step 640 in fig. 4, and steps 657 to 659 in fig. 7 are the refinement flow of step 650 in fig. 4. In this embodiment, the driving signals include a frame start signal and N clock signals.

Step 645, determining a time corresponding to a first data bit with a value of 1 in the digital frame start signal corresponding to the frame start signal as a start time.

In step 646, the time length from the starting time to the time corresponding to the first data bit with the value of 1 in the digital clock signals corresponding to each clock signal is determined as the measured phase of each clock signal. As shown in fig. 1, the measured phase of the clock signal Ck1 is a1.

Step 657, for each clock signal, determining whether a difference between a measured phase of the clock signal and a corresponding target phase is less than or equal to a preset phase error threshold. If the difference between the measured phase of the clock signal and the corresponding target phase is determined to be less than or equal to the preset phase error threshold, step 658 is executed, otherwise step 659 is executed.

At step 658, a fifth indication signal is output. Wherein the fifth indication signal is used to indicate that the measured phase of the driving signal meets the requirement.

Step 659, a sixth indication signal is output. Wherein the sixth indication signal is used to indicate that the measured phase of the drive signal is unsatisfactory. Optionally, the sixth indication signal may further include a measured phase value of the driving signal, so that an engineer adjusts the phase of the driving signal accordingly according to the measured phase value.

It should be noted that, in other embodiments, the driving signal detection method provided in the present application may simultaneously detect and compare two or three characteristic values of a Start Vertical (STV), clock signals CK1 to CKN, and a period, a duty ratio, and a phase of the low frequency signal LC1 and the low frequency signal LC2, so that all driving signals of the display panel can be detected at one time, and the detection efficiency is higher.

The application provides a detection method of driving signal, through converting driving signal into high/low level signal, again with high/low level signal conversion digital type driving signal to detect digital type driving signal's eigenvalue and obtain actual measurement eigenvalue, and will digital type driving signal's actual measurement eigenvalue with the target eigenvalue is compared and is exported corresponding comparison result, can accomplish automatically and compare the detection of driving signal eigenvalue, detection efficiency height. In addition, before the drive signal is subjected to analog-to-digital conversion, the drive signal is converted into a high/low level signal, namely, the analog signal is converted into a standard square wave signal, so that the influence of burrs and jitter in the analog signal on the detection result can be removed, and the detection result is more accurate.

Referring to fig. 8, an embodiment of the present application further provides a display device 1, where the display device 1 includes the driving signal detecting device 10, the timing control unit 20, the display panel 30, and the display panel 40.

Wherein, the timing control unit 20 is electrically connected to the driving signal detecting device 10 and the signal optimizing unit 30, respectively, and the signal optimizing unit 30 is further electrically connected to the display panel 40. The driving signal detecting device 10 is configured to detect an actual measurement characteristic value of a digital driving signal corresponding to a driving signal, detect whether there is a difference between the actual measurement characteristic value and a target characteristic value of the digital driving signal, and feed back a difference value between the actual measurement characteristic value and the target characteristic value of the digital driving signal to the timing control unit 20 when it is detected that there is a difference between the actual measurement characteristic value and the target characteristic value of the digital driving signal. The timing control unit 20 is configured to output the difference value and the corresponding driving signal to the signal optimization unit 30. The signal optimization unit 30 is configured to perform compensation optimization on the driving signal according to the difference value to obtain an optimized driving signal, and output the optimized driving signal to the display panel 40. Illustratively, the display panel 40 may also serve as a human-computer interaction unit 300 in the driving signal detection apparatus 10.

Further, the signal optimization unit 30 includes an analog-to-digital converter (not shown) and a microprocessor (not shown) electrically connected to each other, the analog-to-digital converter is electrically connected to the timing control unit 20, and the microprocessor and the display panel 40 are configured to convert the driving signal into a digital signal and output the digital signal to the microprocessor. The microprocessor is configured to perform value-added operation on the digital signals and the difference values to obtain new digital signals, perform digital-to-analog conversion on the new digital signals to obtain the optimized driving signals, and output the optimized driving signals to the display panel 40 to drive the display panel 40 to display.

The display device 1 can automatically detect the characteristic value of the driving signal, judge whether the characteristic value of the driving signal meets the requirement or not, and automatically optimize and correct the driving signal according to the detection result when the characteristic value of the driving signal does not meet the requirement, so that the efficiency is higher.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A driving signal detecting method, comprising:

receiving a driving signal and a target characteristic value, wherein the driving signal is an analog signal;

converting the driving signal into a high/low level signal based on a voltage value of a preset reference voltage signal;

performing analog-to-digital conversion on the high/low level signals to obtain corresponding digital driving signals;

detecting the characteristic value of the digital driving signal to obtain an actually measured characteristic value; the measured characteristic value comprises at least one of a measured period, a measured duty ratio and a measured phase, and the target characteristic value correspondingly comprises at least one of a target period, a target duty ratio and a target phase; and

comparing the measured characteristic value of the digital driving signal with the target characteristic value, and outputting a corresponding comparison result to indicate the difference between the measured characteristic value and the target characteristic value.

2. The driving signal detecting method as claimed in claim 1, wherein the digital type driving signal is a binary sequence arranged in time series, and the measured characteristic value of the digital type driving signal includes a measured period;

the detecting the characteristic value of the digital driving signal to obtain an actually measured characteristic value includes:

judging whether an m-bit cycle data section with cycle times reaching preset times exists in the digital driving signal; wherein the m-bit cycle data segment includes m-bit binary data arranged in series in the digital type driving signal;

if m-bit cyclic data segments with the cycle times reaching the preset times exist in the digital driving signal, determining the actual measurement period of the digital driving signal according to the number m of the m-bit cyclic data segments; and

if m-bit cycle data sections with the cycle times reaching the preset times do not exist in the digital driving signals, taking m = m +1, and returning to judge whether m-bit cycle data sections with the cycle times reaching the preset times exist in the digital driving signals; wherein m has a starting value of 2.

3. The drive signal detection method according to claim 2, wherein the target characteristic value includes a target period;

the comparing the measured characteristic value of the digital driving signal with the target characteristic value and outputting a corresponding comparison result to indicate a difference between the measured characteristic value and the target characteristic value includes:

judging whether the difference value between the actual measurement period of the digital driving signal and the corresponding target period is smaller than or equal to a preset period error threshold value or not;

if the difference value between the actual measurement period of the digital driving signal and the corresponding target period is smaller than or equal to the preset period error threshold value, outputting a first indicating signal to indicate that the actual measurement period of the driving signal meets the requirement; and

and if the difference value between the actual measurement period of the digital driving signal and the corresponding target period is larger than the preset period error threshold value, outputting a second indicating signal to indicate that the actual measurement period of the driving signal does not meet the requirement.

4. The drive signal detection method of claim 2, wherein the measured characteristic values of the digital type drive signal further include a measured duty cycle;

the detecting the characteristic value of the digital driving signal to obtain an actually measured characteristic value further comprises:

if m-bit cyclic data segments with the cycle times reaching the preset times exist in the digital driving signal, dividing the accumulated number of bits with the value of 1 in the m-bit cyclic data segments by the number m to obtain the actually measured duty ratio of the digital driving signal.

5. The drive signal detection method according to claim 4, wherein the target characteristic value further includes a target duty ratio;

comparing the measured characteristic value of the digital driving signal with the target characteristic value, and outputting a corresponding comparison result to indicate a difference between the measured characteristic value and the target characteristic value, includes:

judging whether the difference value of the actually measured duty ratio of the digital driving signal and the corresponding target duty ratio is smaller than or equal to a preset duty ratio error threshold value or not;

if the difference value between the actually measured duty ratio of the digital driving signal and the corresponding target duty ratio is smaller than or equal to the preset duty ratio error threshold value, outputting a third indicating signal to indicate that the actually measured duty ratio of the driving signal meets the requirement; and

and if the difference value between the actually measured duty ratio of the digital driving signal and the corresponding target duty ratio is larger than the preset duty ratio error threshold value, outputting a fourth indicating signal to indicate that the actually measured duty ratio of the driving signal does not meet the requirement.

6. The driving signal detecting method of any one of claims 1 to 5, wherein the driving signal is used to drive a display panel, the driving signal including a frame start signal, N clock signals, and at least one of two low frequency signals; wherein N is more than or equal to 1.

7. The driving signal detecting method as claimed in claim 6, wherein the driving signal includes a frame start signal and N clock signals, the digital type driving signal is a binary sequence arranged in time sequence, and the measured characteristic value of the digital type driving signal includes a measured phase;

determining the moment corresponding to the first data bit with the value of 1 in the digital frame start signal corresponding to the frame start signal as a start moment; and

and determining the time length from the starting time to the time corresponding to the first data bit with the value of 1 in the digital clock signals corresponding to each clock signal as the actual measurement phase of each clock signal.

8. The drive signal detecting method according to claim 7, wherein the target characteristic value includes target phases, and each clock signal corresponds to one target phase;

for each clock signal:

judging whether the difference value of the actual measurement phase of the clock signal and the corresponding target phase is less than or equal to a preset phase error threshold value or not;

if the difference value between the actually measured phase of the clock signal and the corresponding target phase is smaller than or equal to the preset phase error threshold value, outputting a fifth indicating signal to indicate that the actually measured phase of the driving signal meets the requirement; and

and if the difference value between the actually measured phase of the clock signal and the corresponding target phase is larger than the preset phase error threshold value, outputting a sixth indicating signal to indicate that the actually measured phase of the driving signal does not meet the requirement.

9. A drive signal detection device characterized by comprising:

each signal conversion unit is used for receiving a driving signal, converting the driving signal into a high/low level signal based on the voltage value of a preset reference voltage signal, and performing analog-to-digital conversion on the high/low level signal to obtain and output a corresponding digital driving signal;

the processing unit is electrically connected with the signal conversion units respectively and is used for receiving a target characteristic value corresponding to each driving signal and a digital driving signal output by the signal conversion units, detecting the characteristic value of each digital driving signal to obtain a corresponding actual measurement characteristic value, comparing the actual measurement characteristic value of the digital driving signal with the corresponding target characteristic value, and outputting a corresponding comparison result to indicate the difference between the actual measurement characteristic value and the corresponding target characteristic value; the measured characteristic value of each digital driving signal comprises at least one of a measured period, a measured duty ratio and a measured phase, and the target characteristic value of each digital driving signal correspondingly comprises at least one of a target period, a target duty ratio and a target phase.

10. A display device comprises a display panel and a time sequence control unit, and is characterized by further comprising:

the drive signal detecting device according to claim 9; and

the time sequence control unit is electrically connected with the driving signal detection device and the signal optimization component respectively, and the signal optimization component is also electrically connected with the display panel;

the driving signal detection device is used for feeding back a difference value between an actually measured characteristic value and a target characteristic value of the digital driving signal to the time sequence control unit when detecting that the difference exists between the actually measured characteristic value and the target characteristic value of the digital driving signal; the time sequence control unit is used for outputting the difference value and the corresponding driving signal to the signal optimization component; the signal optimization component is used for carrying out compensation optimization on the driving signals according to the difference values to obtain optimized driving signals, and outputting the optimized driving signals to the display panel.