CN112634800A - Method and system for rapidly and automatically testing refresh frequency of light-emitting diode display screen - Google Patents
Method and system for rapidly and automatically testing refresh frequency of light-emitting diode display screen Download PDFInfo
- Publication number
- CN112634800A CN112634800A CN202011523775.9A CN202011523775A CN112634800A CN 112634800 A CN112634800 A CN 112634800A CN 202011523775 A CN202011523775 A CN 202011523775A CN 112634800 A CN112634800 A CN 112634800A
- Authority
- CN
- China
- Prior art keywords
- display screen
- refresh frequency
- led display
- pass filter
- detector
- 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.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000013307 optical fiber Substances 0.000 claims abstract description 30
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000003384 imaging method Methods 0.000 claims abstract description 10
- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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 Of Optical Devices Or Fibers (AREA)
Abstract
The invention relates to a method and a system for rapidly and automatically testing the refresh frequency of a light-emitting diode display screen, wherein a microscopic imaging system is arranged at the front end of an optical fiber detector, a semi-reflecting and semi-transmitting lens is arranged in the microscopic imaging system, light emitted by a single pixel on the LED display screen to be tested is divided into two beams after passing through the semi-reflecting and semi-transmitting lens, one beam of light is incident to a CCD detector and displays an image of the pixel on a computer, the other beam of light is incident to a photomultiplier through an optical fiber, an electric signal output by the photomultiplier is processed by a filtering and amplifying processing circuit and then transmitted to a high-speed data acquisition card in the computer, the high-speed data acquisition card converts an LAB electric signal into a digital signal, MATMulink software is used for reading the digital signal, a pre-designed simulink module is used for filtering the digital signal, a refresh frequency. The invention can realize the automatic test of the refresh frequency and greatly improve the efficiency and the accuracy of the refresh frequency test.
Description
Technical Field
The invention relates to the technical field of optoelectronics and measurement, in particular to a method and a system for quickly and automatically testing the refresh frequency of a light-emitting diode display screen.
Background
The Light Emitting Diode (LED) display screen is composed of an LED dot matrix and a LED pc panel, characters, pictures, animations and videos are displayed by the on and off of red, blue, white and green LED lamps, the content can be changed at any time, and all components are display devices with modular structures. The conventional LED display screen generally comprises a display module, a control system and a power supply system. The display module is composed of a dot matrix consisting of LED lamps and is responsible for luminous display; the control system can enable the screen to display contents such as characters, pictures, videos and the like by controlling the on and off of the corresponding area, the single-color and double-color screens are mainly used for playing the characters, and the full-color screens are mainly used for playing animations; the power supply system is responsible for converting input voltage and current into voltage and current required by the display screen.
The refresh frequency refers to the number of times that the information displayed on the LED display screen is completely displayed every second. The higher the refresh frequency, the higher the image definition, and the lower the flicker perception. The refresh frequency is an important index of the LED display screen, the refresh frequency test method in the standard value SJ/T11281-containing 2017 in the existing electronic industry of the people's republic of China is calculated by manually reading signals of a photoelectric sensor through an oscilloscope, and the defects of low test efficiency, low accuracy and the like exist.
Disclosure of Invention
Therefore, it is necessary to provide a method and a system for rapidly and automatically testing the refresh frequency of the LED display screen, aiming at the problems of low test efficiency and low accuracy in the prior art that the refresh frequency of the LED display screen is calculated by artificially reading the signal of the photoelectric sensor through an oscilloscope.
In order to solve the problems, the invention adopts the following technical scheme:
a system for fast and automatically testing the refreshing frequency of a light-emitting diode display screen comprises an optical fiber detector, a CCD detector, a detector bracket, an optical fiber, a signal acquisition and amplification device and a computer provided with MATLAB software, wherein the signal acquisition and amplification device comprises a photomultiplier and a filtering and amplification processing circuit;
the optical fiber detector and the CCD detector are arranged on the detector bracket, the front end of the optical fiber detector is provided with a microscopic imaging system, the interior of the microscopic imaging system is provided with a semi-reflecting and semi-transmitting mirror, light emitted by a single pixel on a light emitting diode display screen to be detected is divided into two beams after passing through the semi-reflecting and semi-transmitting mirror, one beam of light is incident to the CCD detector, the CCD detector is connected with the computer and displays an image of the pixel on the computer, the other beam of light is incident to the photomultiplier through the optical fiber, an electric signal output by the photomultiplier is transmitted to a high-speed data acquisition card in the computer after being processed by the filtering and amplifying processing circuit, the high-speed data acquisition card converts the electric signal into a digital signal, the MATLAB software reads the digital signal and utilizes a pre-designed simulink module to filter the digital signal, and obtaining filtered data, drawing a refresh frequency curve by the MATLAB software according to the filtered data, and calculating a refresh frequency value of the LED display screen to be tested according to the waveform period of the refresh frequency curve.
Meanwhile, the invention also provides a method for rapidly and automatically testing the refresh frequency of the LED display screen, which is characterized in that the system is adopted to test the refresh frequency of the LED display screen, and the method comprises the following steps:
the method comprises the following steps: placing a light-emitting diode display screen to be tested in front of the optical fiber detector;
step two: setting the brightness of the LED display screen to be tested to be the highest, and calling a refresh frequency test picture;
step three: observing the position of a point to be tested through an image displayed on a computer, adjusting a detector bracket, and finding out the position of a test pixel;
step four: and after the position is adjusted, starting testing, and running MATLAB software on a computer, wherein the MATLAB software is configured to: reading a digital signal output by a high-speed data acquisition card, filtering the digital signal by using a pre-designed simulink module to obtain filtered data, drawing a refresh frequency curve according to the filtered data, and calculating a refresh frequency value of the LED display screen to be tested according to a waveform period of the refresh frequency curve.
Compared with the prior art, the invention has the following beneficial effects:
(1) the micro-imaging system is arranged at the front end of the optical fiber detector, and can be used for detecting LEDs in a small range, so that light intensity acquisition of a single LED pixel can be realized, the influence of other LEDs on a test result is reduced, and the accuracy of a refresh frequency test is improved;
(2) the high-speed data acquisition card has high data sampling resolution, and the automatic reading of data and the automatic calculation of the numerical value of the refresh frequency are realized by using computer software, so that the automatic test of the refresh frequency is realized, and the efficiency of the refresh frequency test is greatly improved;
(3) the invention utilizes the pre-designed simulink module to filter the test data, effectively filters the noise of the system, is more convenient for intercepting and calculating the data, and further improves the efficiency and the accuracy of the refresh frequency test.
Drawings
FIG. 1 is a schematic diagram of a system for fast and automatically testing a refresh rate of an LED display screen according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a simulink module in an embodiment of the invention;
FIG. 3 is a test plot of an input signal to an FIR digital low pass filter;
FIG. 4 is a test plot of the output signal of the FIR digital low pass filter;
in the figure: 1. a light emitting diode display screen to be tested; 2. an optical fiber detector; 3. a CCD detector; 4. a detector support; 5. an optical fiber; 6. a signal acquisition amplifying device; 7. a computer; 8. an FIR digital low pass filter; 9. a first oscilloscope; 10. a second oscilloscope; 11. inputting a signal; 12. and outputting the signal.
Detailed Description
The invention aims the optical fiber detector at the position of a to-be-tested point on a display screen of a light emitting diode to be tested, then runs test software to collect signals, converts optical signals into electric signals through a photomultiplier, collects and stores the electric signals of a filter, an amplifier and other adjusting circuits into digital signals through a high-speed data collecting card in a computer to form test data, processes the data through an FIR digital low-pass filter, finds out the time corresponding to two adjacent wave troughs, and can calculate the refreshing frequency of the LED display screen. The technical solution of the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1, the present embodiment provides a system for fast and automatically testing a refresh frequency of a light emitting diode display screen, the system includes an optical fiber detector 2, a CCD detector 3, a detector support 4, an optical fiber 5, a signal acquisition and amplification device 6, and a computer 7 installed with MATLAB software, the signal acquisition and amplification device 6 includes a photomultiplier and a filtering and amplification processing circuit.
Specifically, the optical fiber detector 2 and the CCD detector 3 are mounted on a detector support 4, the height and the angle of the detector support 4 are adjustable, a microscopic imaging system is arranged at the front end of the optical fiber detector 2, a half-reflecting and half-transmitting mirror is arranged inside the microscopic imaging system, light emitted by a single pixel on a light emitting diode display screen 1 to be detected in front of the optical fiber detector 2 is divided into two beams after passing through the half-reflecting and half-transmitting mirror, one beam of light is incident to the CCD detector 3, the CCD detector 3 is connected with a computer 7, the CCD detector 3 images the incident light and displays an image of the pixel on the computer 7, the light emitting diode display screen 1 to be detected can be observed through an image picture displayed on the computer 7, the detector support is convenient to adjust, and the position of the pixel point to be detected is found; the other beam of light is incident to the optical signal receiver through the optical fiber 5, in this embodiment, a photomultiplier is selected as the optical signal receiver, the photomultiplier can sensitively distinguish the light intensity variation signal of the LED display screen, and has a fast response speed, so that the test requirement of the refresh frequency of the LED display screen can be completely met, the electrical signal output by the photomultiplier is processed by a filtering and amplifying processing circuit and then transmitted to a high-speed data acquisition card in the computer 7, preferably, the data sampling resolution of the high-speed data acquisition card is 5 microseconds, the high-speed data acquisition card converts the electrical signal into a digital signal, MATLAB software reads the digital signal and performs filtering processing on the digital signal by using a pre-designed simulink module to obtain filtered data, the MATLAB software draws a refresh frequency curve according to the filtered data and calculates the refresh frequency value of the LED display screen to be tested according to the waveform period of the refresh frequency curve, the calculation formula of the refresh frequency is as follows:
Fc＝1/T
where Fc is the refresh frequency in hertz (Hz), and T is the waveform period of the refresh frequency curve in seconds(s).
The micro-imaging system is arranged at the front end of the optical fiber detector in the embodiment, and can be used for detecting LEDs in a small range, so that light intensity collection of a single LED pixel can be realized, the influence of other LEDs on a test result is reduced, and the accuracy of a refresh frequency test is improved; in addition, the high-speed data acquisition card in the embodiment has high data sampling resolution, and the automatic reading of data and the automatic calculation of the numerical value of the refresh frequency are realized by using computer software, so that the automatic test of the refresh frequency is realized, and the efficiency of the refresh frequency test is greatly improved; meanwhile, the test data are filtered by the aid of the pre-designed simulink module, noise in a system structure is effectively filtered, data can be intercepted and calculated conveniently, an LED display screen refreshing frequency curve can be obtained quickly and effectively, the LED display screen refreshing frequency value is automatically calculated, and the efficiency and accuracy of refreshing frequency testing are further improved.
Referring to fig. 2, the simulink module in the present embodiment includes an FIR digital low-pass filter 8, a first oscilloscope 9 and a second oscilloscope 10, where the first oscilloscope 9 is connected to an input end of the FIR digital low-pass filter 8 and is used for monitoring an input signal 11 (i.e., a signal to be filtered) of the FIR digital low-pass filter 8, and the second oscilloscope 9 is connected to an output end of the FIR digital low-pass filter 8 and is used for monitoring an output signal 12 of the FIR digital low-pass filter 8. The FIR digital low-pass filter 8, the first oscilloscope 9, and the second oscilloscope 10 in the present embodiment are all implemented by MATLAB software. Fig. 3 and 4 are test curves of the input signal 11 and the output signal 12, respectively, in which the abscissa represents the number of sampling points (in number) and the ordinate represents the relative light intensity. As can be seen from fig. 3, the test curve has significant noise interference, which seriously affects the analysis processing of the test data, and for this reason, it is necessary to add a filtering system. Fig. 4 is a curve after FIR filtering, and as can be seen from comparison with fig. 4, the curve after filtering is obviously improved compared with the curve before filtering, and the curve transition is smoother, thereby facilitating data interception and calculation.
Further, the simulink module was designed in MATLAB software by the following steps:
the method comprises the following steps: designing FIR digital Low pass Filter 8
Inputting ' fdatool ' into an MATLAB command interface to open a filter design interface, selecting the type of a filter as a low pass in ' response type ', selecting ' FIR ' in a design method ', selecting a specific method for selecting design in a subsequent drop-down box as a ' windows ' window function method, selecting ' hamming ' in attributes, and selecting or writing the order of the filter to be designed in ' filter order ', for example, the order N of an FIR digital low-pass filter is 10, and setting specific parameters of an input filter in ' frequency response characteristic ', for example, setting the sampling frequency fs to 50000 and the cut-off frequency fc to 20; clicking 'design filter' can observe the amplitude-frequency characteristic of the filter and observe the rationality of the filter;
step two: the designed FIR digital low pass filter 8 is converted into the form of a simulink module.
And switching to a 'reuse model' to convert the FIR digital low-pass filter designed in the step one into a form of a simulink module so as to facilitate system simulation, introducing the filtered data into a workplace, adding a signal input module, a signal output module and an oscilloscope module, setting running time, visually seeing the comparison between an input signal 11 and an output signal 12 from the oscilloscope and facilitating analysis of the influence on the whole data after filtering.
The FIR digital low pass filter 8 has a linear phase and is not a fixed delay filter, namelyThe delay of the filtered signal is proportional to the frequency of the input signal, so that when the MATLAB software draws a refresh frequency curve according to the filtered data, the delay time T of the FIR digital low-pass filter 8 is firstly compareddelayCompensating for the delay time TdelayThe calculation formula of (a) is as follows:
where N is the order of the FIR digital low-pass filter 8, and ω is the frequency of the input signal of the FIR digital low-pass filter 8.
Boundary effects: the output caused by unknown input conditions before and after the sampling interval can not be accurately calculated, the length of the affected start interval and the affected end interval of the FIR is equal to the impulse response length minus 1, that is, the front and back 9 values of the filtered data are inaccurate, and the position does not affect the calculation because the data are not needed for calculating the response time.
In another embodiment, the present invention provides a method for fast and automatically testing a refresh rate of a light emitting diode display screen, which is characterized in that the system for fast and automatically testing a refresh rate of a light emitting diode display screen described in the above embodiment is used to test the refresh rate of the light emitting diode display screen, wherein a method for implementing specific functions of each module in the system for fast and automatically testing a refresh rate of a light emitting diode display screen may refer to the implementation methods described in the above embodiments, and will not be described herein again. A method for fast and automatically testing the refresh frequency of a light-emitting diode display screen comprises the following steps:
the method comprises the following steps: referring to fig. 1, a light emitting diode display screen 1 to be tested is placed in front of an optical fiber detector 2;
step two: setting the brightness of the LED display screen 1 to be tested to be the highest, and calling a refresh frequency test picture;
step three: observing the position of a point to be tested through an image displayed on the computer 7, adjusting the detector bracket 5, and finding out the position of a test pixel;
step four: the testing is started after the position is adjusted, at the moment, a light intensity signal of the LED display screen 1 to be tested is led into the photomultiplier through the optical fiber detector 2 and the optical fiber 5, the photomultiplier outputs an electric signal, the electric signal passes through the filtering and amplifying processing circuit and is transmitted into the high-speed data acquisition card in the computer 7, MATLAB software on the computer 7 is operated, and the MATLAB software is configured as follows: reading a digital signal output by a high-speed data acquisition card, filtering the digital signal by using a pre-designed simulink module to obtain filtered data, drawing a refresh frequency curve according to the filtered data, and calculating a refresh frequency value of the LED display screen 1 to be tested according to a waveform period of the refresh frequency curve.
The method for rapidly and automatically testing the refresh frequency of the LED display screen provided by the embodiment realizes the test of the refresh frequency of the LED display screen by using the optical fiber detector, the photomultiplier, the filter, the amplification processing circuit, the high-speed data acquisition card and the test system erected by a computer provided with MATLAB software, the optical fiber detector is used in the test, the LED with a small range can be detected, the influence of other LEDs on the test result is reduced, the photomultiplier with high response speed is used as an optical signal receiver, the light intensity change signal of the LED display screen can be sensitively distinguished, the signal received by the photomultiplier in multiplication is acquired to the computer by using the high-speed data acquisition card with the minimum resolution of 5 microseconds, then the pre-designed simulink module is used for filtering the noise in the system structure, and the refresh frequency curve of the LED display screen can be rapidly and effectively obtained, and automatically calculating the refreshing frequency of the LED display screen according to the refreshing frequency curve, thereby realizing the rapid automatic test of the refreshing frequency of the LED display screen.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A system for rapidly and automatically testing the refreshing frequency of a light-emitting diode display screen is characterized by comprising an optical fiber detector (2), a CCD detector (3), a detector bracket (4), an optical fiber (5), a signal acquisition and amplification device (6) and a computer (7) provided with MATLAB software, wherein the signal acquisition and amplification device (6) comprises a photomultiplier and a filtering and amplification processing circuit;
the optical fiber detector (2) and the CCD detector (3) are installed on the detector support (4), a microscopic imaging system is arranged at the front end of the optical fiber detector (2), a semi-reflecting and semi-transmitting mirror is arranged inside the microscopic imaging system, light emitted by a single pixel on the light emitting diode display screen (1) to be detected is divided into two beams after passing through the semi-reflecting and semi-transmitting mirror, one beam of light is incident to the CCD detector (3), the CCD detector (3) is connected with the computer (7), an image of the pixel is displayed on the computer (7), the other beam of light is incident to the photomultiplier through the optical fiber (5), an electric signal output by the photomultiplier is transmitted to a high-speed data acquisition card in the computer (7) after being processed by the filtering and amplifying processing circuit, and the high-speed data acquisition card converts the electric signal into a digital signal, the MATLAB software reads the digital signals, filtering processing is carried out on the digital signals through a pre-designed simulink module to obtain filtered data, a refresh frequency curve is drawn by the MATLAB software according to the filtered data, and a refresh frequency value of the LED display screen (1) to be tested is calculated according to a waveform period of the refresh frequency curve.
2. The system for rapidly and automatically testing the refresh frequency of the LED display screen according to claim 1, wherein the simulink module comprises an FIR digital low pass filter (8), a first oscilloscope (9) and a second oscilloscope (10);
the digital signals collected by the high-speed data acquisition card are input into the FIR digital low-pass filter (8), the first oscilloscope (9) is used for monitoring the input signals (11) of the FIR digital low-pass filter (8), and the second oscilloscope (10) is used for monitoring the output signals (12) of the FIR digital low-pass filter (8).
3. The system for fast and automatically testing the refresh rate of an led display screen according to claim 1 or 2, wherein the simulink module is designed in MATLAB software by the following steps:
the method comprises the following steps: design FIR digital low pass filter (8)
Inputting ' fdatool ' into an MATLAB command interface to open a filter design interface, selecting the type of a filter as a low pass in ' response type ', selecting ' FIR ' in a design method ', selecting a specific design method in a subsequent drop-down box as a ' windows ' window function method, selecting ' lighting ' in attributes, selecting or writing the order of the filter to be designed in ' filter order ', and inputting specific parameters of the filter in ' frequency response characteristics ';
step two: and converting the designed FIR digital low-pass filter (8) into a form of a simulink module.
4. The system of claim 3, wherein the system for fast and automatically testing the refresh rate of the LED display screen,
the order N of the FIR digital low-pass filter (8) is 10, the specific parameters of the FIR digital low-pass filter (8) comprise a sampling frequency and a cut-off frequency, the sampling frequency fs is 50000, and the cut-off frequency fc is 20.
5. The system for fast and automatically testing the refresh rate of LED display screen according to claim 1 or 2,
the data sampling resolution of the high-speed data acquisition card is 5 microseconds.
6. The system for fast and automatically testing the refresh rate of LED display screen according to claim 1 or 2,
when the MATLAB software draws a refresh frequency curve according to the filtered data, firstly, the delay time T of the FIR digital low-pass filter (8) is measureddelayCompensating for the delay time TdelayThe calculation formula of (a) is as follows:
wherein N is the order of the FIR digital low-pass filter (8) and ω is the frequency of the input signal of the FIR digital low-pass filter (8).
7. A method for fast and automatically testing the refresh rate of an led display screen, wherein the system of any one of claims 1 to 6 is used to test the refresh rate of an led display screen, the method comprising the steps of:
the method comprises the following steps: placing a light-emitting diode display screen (1) to be tested in front of an optical fiber detector (2);
step two: setting the brightness of the LED display screen (1) to be tested to be the highest, and calling a refresh frequency test picture;
step three: observing the position of a point to be tested through an image displayed on a computer (7), adjusting a detector bracket (4) and finding out the position of a test pixel;
step four: and starting the test after the position is adjusted, and running MATLAB software on a computer (7), wherein the MATLAB software is configured to: reading a digital signal output by a high-speed data acquisition card, filtering the digital signal by using a pre-designed simulink module to obtain filtered data, drawing a refresh frequency curve according to the filtered data, and calculating a refresh frequency value of the LED display screen (1) to be tested according to a waveform period of the refresh frequency curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011523775.9A CN112634800A (en) | 2020-12-22 | 2020-12-22 | Method and system for rapidly and automatically testing refresh frequency of light-emitting diode display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011523775.9A CN112634800A (en) | 2020-12-22 | 2020-12-22 | Method and system for rapidly and automatically testing refresh frequency of light-emitting diode display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112634800A true CN112634800A (en) | 2021-04-09 |
Family
ID=75320547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011523775.9A Pending CN112634800A (en) | 2020-12-22 | 2020-12-22 | Method and system for rapidly and automatically testing refresh frequency of light-emitting diode display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112634800A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113723393A (en) * | 2021-11-03 | 2021-11-30 | 浙江宇视科技有限公司 | Image acquisition method, image acquisition device, electronic device, and medium |
| CN115510787A (en) * | 2022-09-23 | 2022-12-23 | 中国科学院国家空间科学中心 | Peak sidelobe constraint rapid attenuation window function design method based on multi-objective optimization |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2822072Y (en) * | 2005-09-29 | 2006-09-27 | 沈阳敏像科技有限公司 | Cell phone camera module frame frequency detector |
| CN101697040A (en) * | 2009-11-02 | 2010-04-21 | 嘉兴市伟博工贸有限公司 | Device for repairing liquid crystal panel based on optical-fibre laser |
| CN101718558A (en) * | 2009-11-20 | 2010-06-02 | 哈尔滨工程大学 | Laser gyroscope strapdown inertia navigation system output conversion device based on reusable IP core |
| CN103018515A (en) * | 2012-12-12 | 2013-04-03 | 电子科技大学 | Digital oscilloscope with seamless measuring capability |
| CN203069350U (en) * | 2013-01-05 | 2013-07-17 | 北方液晶工程研究开发中心 | A testing device of quick response time and high contrast of a 3D light valve |
| US20160003741A1 (en) * | 2013-01-09 | 2016-01-07 | The Regents Of The University Of California | Apparatus and methods for fluorescence imaging using radiofrequency-multiplexed excitation |
| US20160275860A1 (en) * | 2014-08-22 | 2016-09-22 | Boe Technology Group Co., Ltd. | Pixel circuit, organic light emitting display panel and display apparatus |
| CN106409195A (en) * | 2016-08-31 | 2017-02-15 | 南京洛普股份有限公司 | LED display screen refresh rate detection system and method |
| CN106768396A (en) * | 2016-12-23 | 2017-05-31 | 电子科技大学 | A kind of method and system based on differential contrast imaging reduction quantitative phase images |
| US20180025686A1 (en) * | 2015-02-11 | 2018-01-25 | Max-Panck-Gesellschaft Zur Förderung Der Wissenschaften E.V. | Method and device for emulating continuously varying frame rates |
| CN110769247A (en) * | 2019-11-07 | 2020-02-07 | 上海集成电路研发中心有限公司 | Image sensor testing jig and testing method |
-
2020
- 2020-12-22 CN CN202011523775.9A patent/CN112634800A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2822072Y (en) * | 2005-09-29 | 2006-09-27 | 沈阳敏像科技有限公司 | Cell phone camera module frame frequency detector |
| CN101697040A (en) * | 2009-11-02 | 2010-04-21 | 嘉兴市伟博工贸有限公司 | Device for repairing liquid crystal panel based on optical-fibre laser |
| CN101718558A (en) * | 2009-11-20 | 2010-06-02 | 哈尔滨工程大学 | Laser gyroscope strapdown inertia navigation system output conversion device based on reusable IP core |
| CN103018515A (en) * | 2012-12-12 | 2013-04-03 | 电子科技大学 | Digital oscilloscope with seamless measuring capability |
| CN203069350U (en) * | 2013-01-05 | 2013-07-17 | 北方液晶工程研究开发中心 | A testing device of quick response time and high contrast of a 3D light valve |
| US20160003741A1 (en) * | 2013-01-09 | 2016-01-07 | The Regents Of The University Of California | Apparatus and methods for fluorescence imaging using radiofrequency-multiplexed excitation |
| US20160275860A1 (en) * | 2014-08-22 | 2016-09-22 | Boe Technology Group Co., Ltd. | Pixel circuit, organic light emitting display panel and display apparatus |
| US20180025686A1 (en) * | 2015-02-11 | 2018-01-25 | Max-Panck-Gesellschaft Zur Förderung Der Wissenschaften E.V. | Method and device for emulating continuously varying frame rates |
| CN106409195A (en) * | 2016-08-31 | 2017-02-15 | 南京洛普股份有限公司 | LED display screen refresh rate detection system and method |
| CN106768396A (en) * | 2016-12-23 | 2017-05-31 | 电子科技大学 | A kind of method and system based on differential contrast imaging reduction quantitative phase images |
| CN110769247A (en) * | 2019-11-07 | 2020-02-07 | 上海集成电路研发中心有限公司 | Image sensor testing jig and testing method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113723393A (en) * | 2021-11-03 | 2021-11-30 | 浙江宇视科技有限公司 | Image acquisition method, image acquisition device, electronic device, and medium |
| CN113723393B (en) * | 2021-11-03 | 2022-03-18 | 浙江宇视科技有限公司 | Image acquisition method, image acquisition device, electronic device, and medium |
| CN115510787A (en) * | 2022-09-23 | 2022-12-23 | 中国科学院国家空间科学中心 | Peak sidelobe constraint rapid attenuation window function design method based on multi-objective optimization |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112634800A (en) | Method and system for rapidly and automatically testing refresh frequency of light-emitting diode display screen | |
| CN102589705B (en) | Single-blackbody temperature-controlled MRTD (Minimum Resolvable Temperature Difference) field online automatic detection device and method for thermal imager | |
| EP0285521A1 (en) | Highly legible display system for illuminated information | |
| CN105744247A (en) | Mobile device, method and device for carrying out white balance adjustment in mobile device | |
| CN105445677A (en) | Detection method and device for light source stroboflash | |
| US9990874B2 (en) | Method, apparatus and computer program product for testing video playback quality | |
| CN208459716U (en) | A kind of liquid crystal display detection device | |
| CN109100118B (en) | Light source testing method and system | |
| CN106483051A (en) | A kind of device and mobile terminal measuring atmosphere particle concentration for mobile terminal | |
| CN110855983B (en) | Time parameter testing system and method for camera system | |
| CN104808057B (en) | A kind of acousto-optic real-time signal analyzer based on asynchronous detection | |
| CN201340715Y (en) | Device and system for adjusting LED display screen on site | |
| CN206959795U (en) | Contactless filament diameter measurement apparatus based on analog image collection | |
| CN1196343C (en) | Non linear filter for extract light intensity level from full video signal | |
| CN117213644A (en) | Resistance array radiation maintenance and stability characteristic test method | |
| CN204789955U (en) | Lighting products stroboscopic test system | |
| CN106485257A (en) | The washing detergency objective evaluation device and method that view-based access control model is perceived | |
| CN206930588U (en) | A kind of photosynthetical system II delayed fluorescence instrument with multiple pulses arousal function | |
| CN203069350U (en) | A testing device of quick response time and high contrast of a 3D light valve | |
| CN114397013A (en) | Laser power meter and method for calibrating sampling coefficient of large optical system based on laser power meter | |
| CN205453699U (en) | Equipment of monitoring luminous intensity fluctuation | |
| CN104753592A (en) | Light intensity fluctuation monitoring equipment and method | |
| RU2008108130A (en) | METHOD FOR MEASURING BRIGHTNESS CHARACTERISTICS OF OBJECTS IN THE OPTICAL SPECTRUM RANGE AND A DEVICE FOR ITS IMPLEMENTATION | |
| CN215678049U (en) | Femtosecond space-time resolution fluorescence microscopic imaging measurement system | |
| CN203982033U (en) | A kind of optic probe |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210409 |