CN117496850B - Display response signal acquisition and measurement system and method - Google Patents
Display response signal acquisition and measurement system and method Download PDFInfo
- Publication number
- CN117496850B CN117496850B CN202311854824.0A CN202311854824A CN117496850B CN 117496850 B CN117496850 B CN 117496850B CN 202311854824 A CN202311854824 A CN 202311854824A CN 117496850 B CN117496850 B CN 117496850B
- Authority
- CN
- China
- Prior art keywords
- signal
- display
- response time
- acquisition
- waveform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000004044 response Effects 0.000 title claims abstract description 119
- 238000005259 measurement Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 51
- 230000008569 process Effects 0.000 claims abstract description 6
- 238000009825 accumulation Methods 0.000 claims description 27
- 238000004458 analytical method Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 4
- 238000000691 measurement method Methods 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000003044 adaptive effect Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 108010076504 Protein Sorting Signals Proteins 0.000 description 2
- 230000008649 adaptation response Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011896 sensitive detection Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The invention discloses a display response signal acquisition and measurement system and a method, comprising the following steps: the first display signal acquisition device of at least one channel is used for acquiring display signals of at least one display area; the first processing circuit is used for acquiring at least one channel display signal, extracting and generating a first time sequence signal corresponding to the frequency of the display signal from the display signal, and analyzing a display response signal from the display signal. According to the display response signal acquisition and measurement system and method, the response time testing process of real-time testing products in the production process of the display panel is optimized, the response time testing accuracy is improved, and the complexity and cost of the response time testing system are reduced.
Description
Technical Field
The invention belongs to the technical field of display information measurement, and particularly relates to a display response signal acquisition and measurement system and method.
Background
For display panels applied to products such as computers, mobile phones, televisions, industrial control displays and the like on a large scale, response time (Response time) is a key index, and the Response time of the display panel refers to switching time required by changing display pixels from dark to bright or from bright to dark. When the response time is long, serious problems such as image smear and blurring may occur, and the shorter the response time is, the stronger and more realistic the ability to display a dynamic image is. In the actual industrial mass production process, the response time of the display panel is tested by adopting a hardware signal synchronization method, namely, a display panel refreshing signal and a measurement signal are synchronously sent out, and the specific response time of the display panel is measured by comparing the time delay of the waveform of the measurement signal, but the mode has the following three defects:
A, the system is complex and is easy to receive interference, the measuring system needs to output the refresh signal of the display panel and the waveform measuring signal strictly and synchronously, the refresh signal needs to be additionally input, the refresh signal of the display panel is a multi-channel parallel port signal, and the transmission distance is strictly limited and is easy to be interfered by the electromagnetic radiation of the environment.
B, the measurement result contains the delay of the display panel refreshing system, the duty ratio of the delay of the refreshing system is not measured, and meanwhile, the signal to noise ratio of the system is seriously reduced when the display panel is in low brightness, so that the extraction precision is deteriorated.
And C, the display panel refreshing and measuring parameters are required to be frequently set, the operation is complex, and the adaptability is poor.
Disclosure of Invention
Accordingly, in response to at least one of the above-identified deficiencies or improvements in the prior art, the present invention is directed to a display response signal acquisition system comprising:
the first display signal acquisition device of at least one channel is used for acquiring display signals of at least one display area;
The first processing circuit is used for acquiring the display signal of at least one channel, extracting and generating a first time sequence signal corresponding to the frequency of the display signal from the display signal, wherein the first time sequence signal is used for analyzing the display response signal from the display signal;
the display signals comprise display information corresponding to the display area in any display driving signal;
The first display signal acquisition device responds to any acquisition driving signal to execute the display signal acquisition;
the display driving signal is synchronous or asynchronous with the acquisition driving signal.
According to the display response signal acquisition system realized by the invention, a new acquisition architecture based on display response signal acquisition is provided, at the moment, display signals of a display area are directly acquired, a display panel refreshing signal and a waveform measurement signal do not need to be strictly and synchronously output, the efficiency of display test is remarkably improved under the condition of multi-channel detection, and the measurement error of delay generated by a display information refreshing system in a display panel is avoided.
According to the display signal acquisition method provided by the invention, the display driving signals for refreshing the display of the display panel can be ensured, and the display driving signals and the driving signals for controlling measurement acquisition do not need to be synchronized, namely the display driving signals have the correspondence of control time sequences, but under the condition of signal synchronization, the acquisition method can still be used for measuring, and only the acquired display information is processed.
Further, the display signal acquisition system is coupled to at least one processor configured to have at least a first processing program that performs:
and positioning at least one waveform signal period in the display signal according to the first timing signal.
Further, the processor is configured with at least a second handler that performs:
and obtaining response time of brightness change in the display signal by comparing a plurality of brightness accumulation calculation with the brightness accumulation calculation of the waveform signal period.
Or, calculating the brightness accumulation of the waveform signal period and at least one brightness change threshold judgment condition to obtain the response time of brightness change in the display signal.
According to the measurement realized by the invention, the self-adaptive signal measurement is carried out in the extracted waveform signal period without additionally setting a threshold value, and the judgment by the set change threshold value is an implementation mode for acquiring the display response time.
Further, the display signal acquisition system is connected with a second processing circuit:
the second processing circuit comprises a first input and a second input, wherein the first input is used for receiving the first timing signal, the second input is used for receiving the display signal, so that phase-locked filtering is performed on the display signal to generate a processed display signal, and the processed display signal is transmitted to the processor.
Further, the display signal acquisition system is connected with a second processing circuit:
The second processing circuit comprises a first input and a second input, wherein the first input is used for receiving a phase-locked time sequence signal, the second input is used for receiving the display signal, so that phase-locked filtering is performed on the display signal to generate a processed display signal, and the processed display signal is transmitted to the processor.
According to the display response signal acquisition of the invention, a signal with the frequency of the display signal is extracted from the display signal, and a first time sequence signal is obtained.
Or the first timing signal may process the display signal to obtain the data signal. The display signal includes information of the first electric data signal and the first time sequence signal.
The first display signal acquisition device acquires analog signals.
Wherein the first processing circuit or the second processing circuit further comprises:
an analog/digital conversion circuit for converting the first timing signal into a digital signal;
for converting said first analog electrical signal into a digital signal.
Wherein,
The processor is configured to receive a digital signal; or, the processor is configured to convert the analog signal into a digital signal to perform processing.
And the processor is configured at the display response signal acquisition end or is not integrated with the display response signal acquisition end.
The invention further discloses a display response time signal measuring system, which comprises:
The photoelectric detection module is arranged above at least one display area and is used for directly and continuously acquiring display signals of at least one channel; the display signals comprise display information corresponding to the display area in any display driving signal; the photoelectric detection module responds to any acquisition driving signal to execute the display signal acquisition; the display driving signal is synchronous or asynchronous with the acquisition driving signal;
The phase-locked amplifying module is used for acquiring the display signal of at least one channel and extracting a first time sequence signal corresponding to the frequency of the display signal from the display signal; the display signal processing unit is used for processing the display signal to obtain a first electric data signal;
A processor for receiving the first timing signal and the first electrical data signal; or for receiving the first timing signal and the display signal; the processor is configured with a computer program and performs processing to acquire display response time.
Further, the acquiring display response time is as follows: locating a plurality of waveform periods in the display signal or the first electrical data signal with the first timing signal; and acquiring display response time by comparing and judging the brightness accumulation of the waveform periods.
Further, the lock-in amplifying module includes:
The phase locking and setting module is used for generating the first timing signal and the first electric data signal;
and the denoising filter module is used for performing denoising filtering on the first electric data signal and then transmitting the first electric data signal to the processor.
The invention also discloses a system for measuring the display response time signal, which comprises:
the data receiving module is used for receiving a first electric data signal from at least one channel of the display area to be detected; the first electric data signal corresponds to a display signal acquired in the display area, and the display signal comprises display information of any display driving signal corresponding to the display area; the acquisition of the first electrical data signal is performed in response to any acquisition drive signal; the display driving signal is synchronous or asynchronous with the acquisition driving signal;
the phase-locked signal receiving module is used for receiving a first timing signal corresponding to the first electric data signal;
A waveform synchronization module for performing processing positioning on the first electrical data signal for a plurality of waveform periods according to the first timing signal;
And the response time analysis module is used for executing judgment to analyze and acquire the display response time according to the comparison between the amplitude accumulation of the waveform periods.
Further, the first electrical data signal and the first timing signal are obtained by analyzing the display signals randomly collected from the display area to be detected.
The invention also discloses a method for measuring the display response time signal, which comprises the following steps:
acquiring display signals of at least one display area to be detected, wherein the display signals are acquired from any acquisition driving signal; the display area displays display information of any display driving signal, and the display driving signal is synchronous or asynchronous with the acquisition driving signal;
Acquiring a first timing signal in the display signal;
and extracting a plurality of waveform periods from the display signal based on the first timing signal, and acquiring the display response time according to analysis of the plurality of waveform periods.
Further, the analysis of the plurality of waveform periods is as follows: and acquiring amplitude accumulation of the waveform period of a plurality of period segments, and performing comparison analysis among the amplitude accumulation to analyze and acquire the display response time.
Further, before the display signal is resolved, denoising and filtering processing is performed, specifically:
the first timing signal is taken as an input, the display signal is taken as a second input, and the display signal is output through a phase-locked circuit.
Further, the method comprises the steps of,
The comparative analysis is:
obtaining brightness amplitude statistics of the waveform period of the first period section,
Obtaining brightness amplitude statistics of the waveform period of the second period section,
And selecting a first period section and a second period section meeting the conditions by using the judging model, and comparing and analyzing the brightness amplitude values between the first period section and the second period section to obtain the display response time.
Wherein, according to the invention, the brightness amplitude value of the waveform period of the first period section is counted to calculate a first brightness accumulation sum value and a first average value of partial sequence sections;
Wherein, according to the invention, the brightness amplitude value of the waveform period of the second period section is selected to calculate a second brightness accumulation sum value and a second average value of partial sequence sections;
Accumulating the sum value with the first brightness in the first time period, accumulating the sum value with the second brightness in the second time period, and comparing with the second average value with the judgment to analyze and acquire the response time period that the brightness in the waveform period of the first time period and the second time period exceeds the stable brightness change;
And analyzing and determining a part for acquiring the response time period by using the constructed response time period interception model and the maximum brightness value and the minimum brightness value as measured adaptive response time.
In summary, according to the display response time signal measurement method implemented by the invention, the signal processing end is not limited by the acquisition driving signal or the display driving signal, and a plurality of waveform periods can be selected for judgment and comparison, so that a proper display response time interval is selected, and the self-adaption of signal analysis is improved.
In general, compared with the prior art, the above technical solutions of the inventive concept can achieve the following beneficial effects:
In order to solve the defects of the existing display panel response time measuring system that the system is too complex and not accurate enough and flexible, the invention provides a self-adaptive response time measuring method applied to a display panel, and the synchronization of measuring signals of refresh signals is not needed to be additionally input by a measuring system, so that the display signals of a measured product are directly detected, delay errors caused by driving the display panel by electric signals are not included, and a response time detecting system framework different from the prior art is provided in the aspect of display signal acquisition of the display panel.
In the second aspect, in the invention, by directly extracting the time sequence signal from the self luminous display signal and adding a lock-in amplifying mechanism to perform denoising of the signal, the signal-to-noise ratio is remarkably improved, the response time can be accurately measured even if the display panel is in low brightness, and the accuracy is greatly improved; so that the system can maintain excellent performance at low brightness testing.
In the third aspect, the invention does not need to execute complex parameter setting and adopts the detection mode of periodic positioning by the parameters, and the invention directly adopts the signal phase/frequency information obtained by automatic detection, can adaptively extract the response time of the display panel, directly analyzes and observes the display information of the display panel, adapts to various brightness/refresh rates and various different types of display panels, and has the characteristics of simplicity, convenience and flexibility as a whole. The accuracy and efficiency of periodic positioning are remarkably improved, and the adaptive measurement response time is enabled to be possible.
The invention realizes the self-adaptive response time measurement under various display panels, various display brightness and various brightness waveforms, improves the precision, optimizes the response time test process of real-time test products in the production process of the display panels, improves the response time test accuracy, and particularly plays a pushing role in improving the precision measurement and performance improvement of the response characteristics of OLED/LCD/Micro LED/Mini-LED and various display panel products.
Drawings
FIG. 1 is a block diagram of an acquisition system for displaying response signals implemented in accordance with the present invention;
FIG. 2 is a block diagram of one embodiment of a measurement system for displaying response signals implemented in accordance with the present invention;
FIG. 3 is a block diagram of another embodiment of a measurement system for displaying response signals implemented in accordance with the invention;
FIG. 4 is a schematic diagram of a display response signal measurement system setup composition implemented in accordance with the present invention;
FIG. 5 is a schematic diagram of the overall composition of a particular embodiment of a display response time measurement system implemented in accordance with the invention;
FIG. 6 is a truncated schematic diagram of a brightness switching period in response time resolution of a display response time measurement system implemented in accordance with the invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
First, as shown in fig. 1, a display response signal acquisition system according to the present invention includes: the first display signal acquisition device of at least one channel is used for acquiring display signals of at least one display area;
And the first processing circuit is used for acquiring at least one channel display signal and extracting a first timing signal corresponding to the frequency of the display signal from the display signal. The display signal comprises display information of the display area in any drive signal sequence. The first display signal acquisition device continuously acquires display signals under any driving signal sequence.
The display response signal acquisition system is applied to the field of display panel detection, is mainly used for controlling the measurement mode of changing and adjusting display information in a display screen by a direct acquisition mode of display luminous signals compared with a refresh signal mode in the prior art, can remarkably reduce the response time of display driven by the refresh signals, can remarkably improve the response precision of information analysis by directly acquiring the display information for response time detection analysis, can provide a more flexible refresh signal detection mode, and is beneficial to self-adaptive acquisition of the display response signals and signal processing at the rear end by the construction of the whole system.
The display signal acquisition device comprises a photoelectric acquisition device, a brightness meter and other devices which can be used for acquiring luminous information of a display panel.
The channels in the invention can be corresponding to the display signal acquisition devices one by one, and a plurality of acquisition channels can be formed by adopting a plurality of display signal acquisition devices to execute detection on the display panel. Or a display signal acquisition device is adopted to form movable detection, and at the moment, one display signal acquisition device can correspond to a plurality of acquisition channels and can acquire display signals of a plurality of display areas.
Any driving signal of the present invention corresponds to the display driving of the display signal, and the display is not required to be driven in real time by a brushing driving sequence, but any driving signal may be provided to drive the display, and the driving display corresponds to the driving signal capable of highlighting the light emitting display characteristic of the current display panel.
Any one of the invention collects driving signals, and the driving control of the display information collection corresponding to the display signals is related to the control of the display signal collection device.
The first processing circuit is mainly used for processing the display signals, wherein the first processing circuit is used for extracting a first time sequence signal from the display signals which are continuously collected and used for subsequent denoising and signal analysis. The timing signal is extracted according to an acquired analog signal, which is an extraction manner known to those skilled in the art, and is not described in detail herein.
The first timing signal may be composed of signals of different frequencies in time sequence corresponding to driving signals of display regions of different display panels.
The first display signal acquisition device acquires an analog signal, the extracted first timing signal is also the analog signal, and a phase-locked circuit is further used for denoising.
Wherein, as shown in fig. 2-6, after being processed in the phase-locked circuit, an analog/digital conversion circuit 23 is connected for converting the first timing signal acquired by the first display signal acquisition device into a digital signal; meanwhile, the display signals collected as analog signals can be converted into digital signals. The conversion of the digital signal can be performed by arranging an analog/digital conversion circuit at the processing end, but the conversion of the digital signal at the acquisition end can realize longer-distance signal transmission.
Wherein the digital signal is transmitted to a processor, wherein the processor is configured with at least a first processing program, the first processing program executing: at least one waveform signal period is located in the signal at a first timing signal. Is configured to have at least a second handler that performs: and obtaining the response time of brightness switching in the display signal by the brightness accumulation calculation of the waveform signal period and at least one brightness switching judgment condition. Wherein the processor is configured to receive the digital signal; or, a processor configured to convert the analog signal into a digital signal to execute the first processing program and the second processing program.
As a hardware device corresponding to the acquisition system of the present invention, for example, the photoelectric detection device 50 is disposed above at least one corresponding display area to be detected, and continuously and directly acquires display signals corresponding to the display area; the lock-in amplifying module 20 is connected to the photoelectric detection device 50 and is used for processing the display signal.
The lock-in amplifying module 20 includes a lock-in and setting module 21, a denoising and filtering module 22, and an analog/digital conversion module 23, which are sequentially connected. The above division mode is mainly based on the functional design of the lock-in amplifying module 20, but the combination or substitution of a plurality of different circuit modules can realize the present invention, for example, the lock-in circuit in the present invention is mainly denoising processing, and can realize reliable signal processing, and other circuits capable of performing signal processing are also included in the scope of the technical solution of the present invention.
The design of the subsequent processing circuit according to the invention mainly consists in extracting the first timing signal directly from the display signal and the first electrical data signal, extracting the waveform of the first electrical data signal by using the first timing signal, preferably filtering and denoising the first electrical data signal or the display signal by further using the first timing signal through a phase-locked circuit. The design, arrangement and division of specific functions of the circuit board are included in the embodiments of the present invention under the knowledge of the core situation in the art, for example, denoising, amplifying, analog-to-digital conversion circuits of signals are added on the basis of functional modules.
As another aspect of the present invention, a method for measuring response time of a display panel is provided, wherein display information of a display area of the display panel is continuously and directly acquired; acquiring reference information corresponding to the display information from the display information; performing phase-locked denoising by using the reference information and the display information to acquire data information which can be transmitted to the processing device; and analyzing and acquiring the response time of the display panel by using the reference information and the data information.
The response time of the display panel obtained by analysis is as follows: marking at least one period of data information from the data information with timing information in the reference information; acquiring brightness switching period identification information by the brightness accumulation calculation of the at least one period data information; the adaptation time is identified by the brightness switching period.
In summary, the brightness accumulation calculation of the waveform signal period is used, and the response time of brightness change in the display signal is obtained by the comparison among a plurality of accumulation calculations;
or, calculating the brightness accumulation of the waveform signal period and at least one brightness change threshold judgment condition to obtain the response time of brightness change in the display signal.
According to the measurement realized by the invention, the self-adaptive signal measurement is carried out in the extracted waveform signal period without additionally setting a threshold value, and the judgment by the set change threshold value is an implementation mode for acquiring the display response time.
Wherein, the luminance switching period identification information is: the amplitude accumulated value of the waveform period in the first period is acquired, and the amplitude accumulated value of the waveform period in the second period is acquired in a self-adaptive judging condition. The first time period and the second time period are mainly two adjacent sequence periods for searching the brightness switching point under the response time switching, and in the computer program execution, the self-adaptive condition judgment is mainly carried out one by one in a plurality of time periods so as to search the period for acquiring the display response.
The signal measuring and analyzing method for analyzing the self-adaptive corresponding time mainly comprises the following steps:
The method comprises the steps of obtaining sequence segments of a plurality of waveform periods, selecting a sequence segment of at least one waveform period, selecting a partial brightness data accumulation sum, further obtaining an average value and a root mean square value, when the difference value between the brightness accumulation sum average value in the period after switching and the brightness accumulation sum average value in the period before switching is larger than the normal fluctuation of the brightness accumulation sum in the period before and after switching, judging that brightness switching occurs, constructing an adaptive judgment model to realize comparison, determining the time spanned by a section between two sequence segments as a brightness switching sequence segment after the corresponding sequence segments are compared, calculating and selecting a brightness maximum value and a brightness minimum value in the brightness switching sequence segment, and calculating and obtaining response time by the brightness maximum value and the brightness minimum value.
As shown in fig. 2-3, the present invention proposes a display response time signal measurement system comprising: the photoelectric detection module 50 is arranged above at least one display area and is used for directly and continuously acquiring display signals of at least one channel; the first processing circuit is used for acquiring at least one channel display signal and extracting a first timing signal corresponding to the frequency of the display signal from the display signal; the first processing circuit and/or the second processing circuit are used for processing the display signals to obtain first electric data signals; a processor for receiving a first timing signal and a first electrical data signal; or for receiving a first timing signal and a display signal; and a processor configured with a computer program to perform processing to obtain a display response time.
In a specific hardware circuit configuration, the first processing circuit finishes processing various signals of the display signals, extracts a first timing signal and a first electric data signal, and sends the first timing signal and the first electric data signal to the processor, and similarly, the first timing signal and the first electric data signal can be further processed and analyzed by the second processing circuit to obtain the first electric data signal;
In the configuration of the preferred embodiment, the first timing signal is used as one input of the phase-locked circuit, in fact, the second processing circuit can input the timing signal obtained by analyzing the display driving signal to perform phase-locked filtering under the condition of inputting the display signal, and the accuracy of the signal can be remarkably improved by adopting the first timing signal directly analyzed in the display signal.
As the configuration of the processor in the invention, the processor can be directly integrated on the display acquisition system end or be a computer processing end which is remotely configured.
As the processor in the invention, the first processing circuit and the second processing circuit can be arranged at the processor end and directly send the acquired signals to the processor at the back end for processing.
The system mainly comprises five parts (shown in fig. 5) of a tested display panel 10, a photoelectric detector 50, a lock-in amplifying module 20, a data processing host 30 and response time analysis software 40, wherein the tested display panel is a tested object and can be an OLED/LCD/Micro LED/Mini-LED and various display panel products commonly used in various markets, the photoelectric detector 50 is used for converting an optical signal output by the display panel into an analog electric signal, the lock-in amplifying module 20 is used for carrying out lock-in amplifying on the analog electric signal obtained by the photoelectric detector 50, filtering and outputting most of noise, the data processing host 30 is a general or special host which is used for data processing, the response time analysis software 40 is a part of information data program processing package of the system, and response time data obtained by analyzing the acquired data are output.
The composition of the response time analysis software 40 and the principle of its cooperation with the components of the signal link are given in fig. 5-6. The photoelectric sensor 50 converts the optical signal output by the display panel into an analog electrical signal and outputs the analog electrical signal to the sub-module of the lock-in amplifying module 20, i.e. the lock-in and setting module 21.
The phase-locking and setting module 21 detects the frequency of the analog electric signal first, and excites the reference signal with the same frequency, and the reference signal and the analog electric signal pass through the phase-sensitive detection process of the PSD in the denoising and filtering module 22, so that most of irrelevant noise is filtered, and the signal-to-noise ratio is remarkably improved.
The analog electrical signal then enters an analog/digital conversion module to be converted into a digital signal, which is transmitted over a longer distance to a sub-module of the response time analysis software 40, the data receiving module 41. The digital signal is converted into a digital signal and then transmitted in a longer distance, compared with an analog signal, the digital signal has better anti-interference capability in long-distance transmission, and the structure of a transmission link can be simplified.
The method for measuring the response time in the prior art needs to extract the starting and ending points of the response change of the waveform by means of parameter configuration and the form of waveform data, has larger error and poorer adaptability, adopts the waveform synchronization method in the waveform synchronization module 43, synchronously utilizes the phase-locking time sequence signals sent out by the phase-locking and setting module 21 to quickly and accurately position the starting and ending positions (such as vertical line marks in 43) of the waveform period in the waveform data from the data receiving module 41, realizes the self-adaptive analysis of the response time measurement in the 44 according to the starting and ending positions of the waveform period and the waveform data, does not need to set the parameters of the response change of the waveform in the measurement according to the type and the brightness range of the display panel, and simultaneously ensures that the response time measurement is more accurate. In an embodiment according to the present invention, a specific calculation embodiment for performing response time adaptive measurement based on waveform data after phase-locked signal positioning is as follows.
Example 1:
following the principle described in fig. 2, after the waveform data passes through the cycle start-stop point flag of the waveform synchronization module 43, the luminance accumulation sum S (n) in the nth cycle is obtained by:
Where L0 is dark field data, which can be measured in dark field, lm represents the mth luminance data in the nth period, and a is the calibration coefficient of the original data to luminance.
If the display panel switches brightness at the p-th period of the total N periods contained in the waveform data (p is the serial number of the switching period to be identified), the sum is accumulated in each period before switchingMean/>And root mean square/>：
。
Accumulation and summation of each period after switchingMean/>And root mean square/>The method comprises the following steps: .
Due to the periodic characteristics of the display panel signals, the brightness is accumulated and averaged in the period after switchingSum means/>, of luminance in period before switchingThe difference value of (2) is larger than the normal fluctuation of the brightness accumulation sum in the front and back periods, namely the brightness switching occurs, and the self-adaptive recognition condition for the brightness switching is expressed as follows:
in some specific embodiments, the possible values of K and the confidence probabilities corresponding to the identification are as follows:
According to the above identification conditions, in the sequence By applying a sliding window traversing mechanism in the sequence, the specific position of the switching period p can be automatically identified. After the specific position of the switching period p is identified, the point with the maximum brightness in the period/>, is taken through waveform data in the period pTo the minimum brightness point/>The time spanned by a segment within a segment meeting the following requirements is the response time/>：
It [%,/>The%o may be [10%,90% ], 20%,80% ] or others/>And/>One embodiment of the adaptive response time measurement is shown in fig. 6, which is in the scale range of 0-100%:
Example 2:
setting the serial number of the period to be switched as p for the waveform model of the positioning period of the phase-locked signal, and calculating to obtain the brightness and statistic in the period before and after switching ，/>，/>，/>After that, the adaptive recognition condition for the occurrence of brightness switching is set as:
The possible values of K and the confidence probabilities corresponding to the identification are as follows:
According to the above identification conditions, in the sequence By applying a sliding window traversing mechanism in the sequence, the specific position of the switching period p can be automatically identified. After the specific position of the switching period p is identified, the point with the maximum brightness in the period/>, is taken through waveform data in the period pTo the minimum brightness point/>The time spanned by a segment within a segment meeting the following requirements is the response time R:
Wherein [ among others ] %,/>The%o may be [10%,90% ], 20%,80% ] or others/>And/>In the ratio range of 0-100%.
Example 3:
setting the serial number of the period to be switched as p for the waveform model of the positioning period of the phase-locked signal, and calculating to obtain the brightness and statistic in the period before and after switching ，/>，/>，/>After that, the adaptive recognition condition for the occurrence of brightness switching is set as:
The possible values of K and the confidence probabilities corresponding to the identification are as follows:
According to the above identification conditions, in the sequence By applying a sliding window traversing mechanism in the sequence, the specific position of the switching period p can be automatically identified. After the specific position of the switching period p is identified, the point with the maximum brightness in the period/>, is taken through waveform data in the period pTo the minimum brightness point/>The time spanned by a segment within a segment meeting the following requirements is the response time R:
Wherein [ among others ] %,/>The%o may be [10%,90% ], 20%,80% ] or other ratio ranges between 0 and 100% of X1 and X2.
The matters described in the present specification are merely illustrative of the present invention, and those skilled in the art may make various modifications or additions to the specific embodiments described or substitutions in a similar manner without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (14)
1. A display response signal acquisition system, comprising:
the first display signal acquisition device of at least one channel is used for acquiring display signals of at least one display area;
A first processing circuit, configured to obtain the display signal of at least one channel, extract and generate a first timing signal corresponding to the frequency of the display signal from the display signal, where the first timing signal is used to locate at least one waveform signal period in the display signal to parse the display response signal;
the display signals comprise display information corresponding to the display area in any display driving signal;
The first display signal acquisition device responds to any acquisition driving signal to execute the display signal acquisition;
the display driving signal is synchronous or asynchronous with the acquisition driving signal.
2. The display response signal acquisition system according to claim 1, wherein the display response signal acquisition system is coupled to at least one processor, the processor configured with at least a first processing program, the first processing program performing:
and positioning a plurality of waveform signal periods in the display signal according to the first timing signal.
3. The display response signal acquisition system of claim 2 wherein the processor is configured with at least a second processing program, the second processing program performing:
and obtaining response time of brightness change in the display signal by comparing a plurality of brightness accumulation calculation with the brightness accumulation calculation of the waveform signal period.
4. The display response signal acquisition system of claim 3 wherein the display signal acquisition system is coupled to a second processing circuit:
the second processing circuit comprises a first input and a second input, wherein the first input is used for receiving the first timing signal, the second input is used for receiving the display signal, so that phase-locked filtering is performed on the display signal to generate a processed display signal, and the processed display signal is transmitted to the processor.
5. The display response signal acquisition system of claim 3 wherein the display signal acquisition system is coupled to a second processing circuit:
The second processing circuit comprises a first input and a second input, wherein the first input is used for receiving a phase-locked time sequence signal, the second input is used for receiving the display signal, so that phase-locked filtering is performed on the display signal to generate a processed display signal, and the processed display signal is transmitted to the processor.
6. A display response signal measurement system, the system comprising:
The photoelectric detection module (50) is arranged above at least one display area and is used for directly and continuously acquiring display signals of at least one channel; the display signals comprise display information corresponding to the display area in any display driving signal; the photoelectric detection module (50) responds to any acquisition driving signal to execute the display signal acquisition; the display driving signal is synchronous or asynchronous with the acquisition driving signal;
a phase-locked amplifying module (20) for acquiring the display signal of at least one channel, and extracting a first timing signal corresponding to the frequency of the display signal from the display signal; the display signal processing unit is used for processing the display signal to obtain a first electric data signal;
A processor for receiving the first timing signal and the first electrical data signal; or for receiving the first timing signal and the display signal; the processor is configured with a computer program to perform a process to locate at least one waveform signal period in the display signal or the first electrical data signal with the first timing signal to obtain a display response time.
7. The display response signal measurement system of claim 6, wherein the acquired display response time is: locating a plurality of waveform periods in the display signal or the first electrical data signal with the first timing signal; and acquiring display response time by comparing and judging the brightness accumulation of the waveform periods.
8. The display response signal measurement system according to claim 6 or 7, wherein the lock-in amplifying module (20) includes:
A phase lock and set module (21) for generating the first timing signal and the first electrical data signal;
and the denoising filter module (22) is used for performing denoising filtering on the first electric data signal and transmitting the first electric data signal to the processor.
9. A display response time signal measurement system, the system comprising:
A data receiving module (41) for receiving a first electrical data signal from at least one channel of the display area to be detected; the first electric data signal corresponds to a display signal acquired in the display area, and the display signal comprises display information of any display driving signal corresponding to the display area; the acquisition of the first electrical data signal is performed in response to any acquisition drive signal; the display driving signal is synchronous or asynchronous with the acquisition driving signal;
A phase-locked signal receiving module (42) for receiving a first timing signal corresponding to the first electrical data signal; the first timing signal is obtained through analysis from the display signals of the corresponding display areas;
A waveform synchronization module (43) for performing processing positioning of a plurality of waveform periods on the first electrical data signal in accordance with the first timing signal;
a response time analysis module (44) for performing a decision to resolve the acquisition of the display response time based on a comparison between the magnitude accumulation of the plurality of waveform periods.
10. The display response time signal measurement system of claim 9, wherein the first electrical data signal and the first timing signal are resolved from a display signal randomly acquired from the display area to be detected.
11. A method for measuring a display response time signal, said method comprising the steps of:
acquiring display signals of at least one display area to be detected, wherein the display signals are acquired from any acquisition driving signal; the display area displays display information of any display driving signal, and the display driving signal is synchronous or asynchronous with the acquisition driving signal;
analyzing and acquiring a first timing signal in the display signal;
and extracting a plurality of waveform periods from the display signal based on the first timing signal, and acquiring the display response time according to analysis of the plurality of waveform periods.
12. The display response time signal measurement method according to claim 11, wherein the parsing of the plurality of waveform periods is: and acquiring amplitude accumulation of the waveform period of a plurality of period segments, and performing comparison analysis among the amplitude accumulation to analyze and acquire the display response time.
13. The display response time signal measurement method according to claim 12, wherein the display signal, before being parsed, performs a denoising filter process, in particular:
the first timing signal is taken as an input, the display signal is taken as a second input, and the display signal is output through a phase-locked circuit.
14. The display response time signal measurement method of claim 12, wherein the comparison analysis is:
obtaining brightness amplitude statistics of the waveform period of the first period section,
Obtaining brightness amplitude statistics of the waveform period of the second period section,
And selecting a first period section and a second period section meeting the conditions by using the judging model, and comparing and analyzing the brightness amplitude values between the first period section and the second period section to obtain the display response time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311854824.0A CN117496850B (en) | 2023-12-29 | 2023-12-29 | Display response signal acquisition and measurement system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311854824.0A CN117496850B (en) | 2023-12-29 | 2023-12-29 | Display response signal acquisition and measurement system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117496850A CN117496850A (en) | 2024-02-02 |
| CN117496850B true CN117496850B (en) | 2024-04-19 |
Family
ID=89685378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311854824.0A Active CN117496850B (en) | 2023-12-29 | 2023-12-29 | Display response signal acquisition and measurement system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117496850B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10133176A (en) * | 1996-09-05 | 1998-05-22 | Toshiba Corp | Liquid crystal display device and its driving method |
| KR20050051368A (en) * | 2003-11-27 | 2005-06-01 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display and method of controlling response time thereof |
| CN1673810A (en) * | 2005-04-19 | 2005-09-28 | 浙江大学 | Liquid crystal display response time electrooptical automatic measuring instrument |
| CN101008718A (en) * | 2006-01-27 | 2007-08-01 | 晨星半导体股份有限公司 | Measurement device for gray-to-gray response time |
| CN103000144A (en) * | 2012-12-24 | 2013-03-27 | 深圳Tcl新技术有限公司 | Backlight adjusting method and device of liquid crystal display device |
| CN103489387A (en) * | 2013-09-24 | 2014-01-01 | 国家电网公司 | Displayer picture switching response time test system and method |
| CN105261323A (en) * | 2015-11-24 | 2016-01-20 | 深圳市华星光电技术有限公司 | Display screen control system and display device |
| CN106920507A (en) * | 2015-12-28 | 2017-07-04 | 乐金显示有限公司 | The display device of device is immersed for individual |
| CN114114725A (en) * | 2020-08-28 | 2022-03-01 | 深圳莱宝高科技股份有限公司 | Method for testing LCM response time and related equipment |
| CN114742089A (en) * | 2020-12-24 | 2022-07-12 | 北京广利核系统工程有限公司 | DCS automatic test method, device and system |
| CN114859583A (en) * | 2022-04-11 | 2022-08-05 | 汕头大学 | Device for optimizing performance of liquid crystal light-driven display sample and light adjusting method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100835928B1 (en) * | 2001-12-13 | 2008-06-09 | 엘지디스플레이 주식회사 | Method and apparatus for measuring response time of liquid crystal |
| TWI550595B (en) * | 2012-05-09 | 2016-09-21 | 晨星半導體股份有限公司 | Measure equipment and associated method for response speed of display panel |
| TWI760666B (en) * | 2019-12-11 | 2022-04-11 | 瑞昱半導體股份有限公司 | Measurement system and method for measuring a response time of a liquid crystal display |
| JP2022182139A (en) * | 2021-05-27 | 2022-12-08 | 上海天馬微電子有限公司 | Liquid crystal display device |
-
2023
- 2023-12-29 CN CN202311854824.0A patent/CN117496850B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10133176A (en) * | 1996-09-05 | 1998-05-22 | Toshiba Corp | Liquid crystal display device and its driving method |
| KR20050051368A (en) * | 2003-11-27 | 2005-06-01 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display and method of controlling response time thereof |
| CN1673810A (en) * | 2005-04-19 | 2005-09-28 | 浙江大学 | Liquid crystal display response time electrooptical automatic measuring instrument |
| CN101008718A (en) * | 2006-01-27 | 2007-08-01 | 晨星半导体股份有限公司 | Measurement device for gray-to-gray response time |
| CN103000144A (en) * | 2012-12-24 | 2013-03-27 | 深圳Tcl新技术有限公司 | Backlight adjusting method and device of liquid crystal display device |
| CN103489387A (en) * | 2013-09-24 | 2014-01-01 | 国家电网公司 | Displayer picture switching response time test system and method |
| CN105261323A (en) * | 2015-11-24 | 2016-01-20 | 深圳市华星光电技术有限公司 | Display screen control system and display device |
| CN106920507A (en) * | 2015-12-28 | 2017-07-04 | 乐金显示有限公司 | The display device of device is immersed for individual |
| CN114114725A (en) * | 2020-08-28 | 2022-03-01 | 深圳莱宝高科技股份有限公司 | Method for testing LCM response time and related equipment |
| CN114742089A (en) * | 2020-12-24 | 2022-07-12 | 北京广利核系统工程有限公司 | DCS automatic test method, device and system |
| CN114859583A (en) * | 2022-04-11 | 2022-08-05 | 汕头大学 | Device for optimizing performance of liquid crystal light-driven display sample and light adjusting method |
Non-Patent Citations (1)
| Title |
|---|
| 基于双探头的新型液晶显示器响应时间测量方法的研究;慕建伟;姚军;吕颖琦;;光电子.激光;20080215;第19卷(第2期);第218-220页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117496850A (en) | 2024-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8849213B2 (en) | Integrated circuit for signal analysis | |
| CN109387813B (en) | High-precision frequency measurement method based on broadband radar signal reception | |
| CN107144781B (en) | Measurement system with digital edge triggered detection circuit | |
| CN108761557B (en) | A kind of chiasma type light curtain detection device based on FPGA | |
| CN103995164A (en) | Digital measurement instrument triggered by signal pattern | |
| CN106556780A (en) | A kind of shelf depreciation type determines method and system | |
| CN113269169A (en) | Bearing fault detection method and device | |
| CN117496850B (en) | Display response signal acquisition and measurement system and method | |
| CN101682797B (en) | Systems and methods for robust video temporal registration | |
| CN102300116B (en) | Rapid detection method of video resolution and apparatus thereof | |
| CN109633733B (en) | Digital anti-Compton energy spectrum measuring system adopting particle event reading mode | |
| CN104994377B (en) | A kind of television set machine shakes method of testing | |
| CN105530444B (en) | Detect the method, apparatus and video conferencing system of the vision signal of identical standard | |
| CN101006719A (en) | Video format detector and integrated circuit comprising such video format detector as well as method for distinguishing different standards and/or types of video formats | |
| CN111585742B (en) | Multi-channel signal peak value synchronous detection system | |
| CN114697014B (en) | Delay scanning method and system for phase-encoded QKD system | |
| CN108574565A (en) | A kind of S mode transmitter signal quality detection device and method | |
| CN104316173B (en) | A kind of adaptive synchronicity integral light receiver based on acousto-optic scanning | |
| CN112152735A (en) | Broadband real-time APD (avalanche photo diode) measuring method based on STFFT (fast Fourier transform algorithm) | |
| CN217766848U (en) | Detection system | |
| CN112291552B (en) | Image configuration display method based on FPGA | |
| CN214591404U (en) | Double-station receiving system | |
| US20240152180A1 (en) | Method for detecting folding angle of foldable screen, touch chip, and touch panel | |
| EP4318034A1 (en) | A method and a device for determining a distance to a target | |
| CN102632090B (en) | Band steel edge part pin hole detecting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |