CN116067623A

CN116067623A - Quality detection method, equipment and medium of projection optical machine

Info

Publication number: CN116067623A
Application number: CN202310034900.7A
Authority: CN
Inventors: 徐振宾; 郝瑞娜
Original assignee: Goertek Optical Technology Co Ltd
Current assignee: Goertek Optical Technology Co Ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-05-05

Abstract

The present disclosure provides a quality detection method, apparatus and medium for a projection optical machine, where the method includes: in a first test of projecting and displaying a test picture, respectively acquiring the first test picture at a plurality of set first moments to obtain a plurality of groups of first test images; for each first moment, determining detection values at a plurality of set test areas according to a first test image at the first moment to obtain a plurality of first detection values corresponding to the first moment; for adjacent moments in the first moments, according to the first detection values of the adjacent moments, detection data corresponding to the adjacent moments are obtained; determining a first stable time point according to a plurality of detection data corresponding to a plurality of adjacent moments; in a second test of projecting and displaying a test picture, respectively acquiring the second test picture at a plurality of second moments before the first stable time point to obtain a plurality of groups of second test images; and determining a quality detection result of the projection optical machine according to the plurality of groups of second test images.

Description

Quality detection method, equipment and medium of projection optical machine

Technical Field

The embodiment of the disclosure relates to the technical field of projection light machines, and more particularly, to a quality detection method of a projection light machine, a quality detection device of a projection light machine and a computer readable storage medium.

Background

With the development of science and technology, the projection quality of the projection optical machine is continuously improved. In order to ensure the reliability of the projection quality, a person skilled in the art often detects the projection quality of the projection light machine by pre-storing a picture on the projection light machine and by pre-storing an image projected by the picture. For example, the projection quality of the projection light machine is detected by comparing the color saturation, contrast, brightness, etc. of the projected image with those of the pre-stored picture.

However, in detecting the projection quality of the projection light machine, there may be a case where both the test environment and the projection light machine affect the projection quality together. For example, the LED lamp of the projector is affected by temperature, so that the heat balance of the projector is stabilized after reaching a corresponding degree. For another example, due to the problem of the assembly of the light engine itself, the degree of inclination with respect to the projection plane is different, the degree of sensitivity of the light engine is different, etc. As another example, whether the ambient temperature of the test environment remains constant during the test, etc. In this case, the quality detection result often cannot objectively evaluate the projection quality of the projection light machine, and it is not convenient for the user to select the product with the best quality from the multiple projection light machines.

Therefore, it is desirable to provide a quality detection method of a projection light machine to accurately reflect the imaging quality of the projection light machine.

Disclosure of Invention

It is an object of an embodiment of the present disclosure to provide a new solution for quality detection of a projection light engine.

According to a first aspect of embodiments of the present disclosure, there is provided a quality detection method of a projection light engine, the method including:

in a first test process of projecting and displaying a first test picture by the projection optical machine, respectively acquiring the first test picture at a plurality of set first sampling moments to obtain a plurality of groups of first test images;

for each first sampling moment, determining detection values of the projection optical machine at a plurality of set test areas according to a first test image corresponding to the first sampling moment to obtain a plurality of first detection values corresponding to the first sampling moment;

for adjacent sampling moments in the plurality of first sampling moments, obtaining detection data corresponding to the adjacent sampling moments according to the plurality of first detection values of the adjacent sampling moments; the detection data comprise drop values of first detection values of each test area at the adjacent sampling moments;

Determining a first stable time point of the projection optical machine according to a plurality of detection data corresponding to a plurality of adjacent sampling moments;

in a second test process of projecting and displaying a second test picture by the projection optical machine, respectively acquiring the second test picture at a plurality of second sampling moments before the first stable time point to obtain a plurality of groups of second test images;

determining a quality detection result of the projection optical machine according to the plurality of groups of second test images

Optionally, the obtaining a quality detection result of the projection optical machine according to the multiple sets of second test images includes:

determining second detection values of the projection optical machine at first test areas in the plurality of test areas according to second test images corresponding to the second sampling moments to obtain a plurality of second detection values corresponding to the second sampling moments one by one;

and determining a quality detection result of the projection optical machine according to the change conditions of the second detection values.

Optionally, the determining the quality detection result of the projection optical machine according to the change condition of the plurality of second detection values includes:

obtaining a second stable time point of the projection optical machine according to the change condition of the plurality of second detection values; wherein the second stable time point is a second sampling time point at which the amount of change of the plurality of second detection values from this time is less than or equal to a set threshold value;

Obtaining the maximum drop value of the plurality of second detection values according to the change condition of the plurality of second detection values;

and determining a quality detection result of the projection optical machine according to the second stable time point and the maximum drop value.

Optionally, the first test picture and the second test picture are the same picture.

Optionally, the plurality of test areas includes a test area located at a projection center of the projection light engine, at least one test area located at a projection area of an upper left corner of the projection center, at least one test area located at a projection area of a lower left corner of the projection center, at least one test area located at a projection area of an upper right corner of the projection center, and at least one test area located at a projection area of a lower right corner of the projection center.

Optionally, the first detection value is a modulus transfer function value of a lens module of the projection optical machine.

According to a second aspect of the embodiments of the present disclosure, there is provided a quality detection apparatus of a projection light engine, the apparatus comprising:

the acquisition module is used for respectively acquiring the first test pictures at a plurality of set first sampling moments in a first test process of projecting and displaying the first test pictures by the projection optical machine to obtain a plurality of groups of first test images;

The detection module is used for determining detection values of the projection optical machine at a plurality of set test areas according to the first test image corresponding to each first sampling moment and obtaining a plurality of first detection values corresponding to the first sampling moment;

the computing module is used for obtaining detection data corresponding to the adjacent sampling moments according to the plurality of first detection values of the adjacent sampling moments for the adjacent sampling moments in the plurality of first sampling moments; the detection data comprise drop values of first detection values of each test area at the adjacent sampling moments;

the determining module is used for determining a first stable time point of the projection optical machine according to a plurality of detection data corresponding to a plurality of adjacent sampling moments;

the acquisition module is used for respectively acquiring a plurality of second test pictures at a plurality of second sampling moments before the first stable time point in a second test process of projecting and displaying the second test pictures by the projection optical machine so as to obtain a plurality of groups of second test images;

the determining module is used for determining a quality detection result of the projection optical machine according to the plurality of groups of second test images.

According to a third aspect of embodiments of the present disclosure, there is provided a quality detection apparatus of a projection light engine, the projection light engine apparatus further comprising:

a memory for storing executable computer instructions;

a processor for executing the quality detection method according to the above first aspect, according to control of the executable computer instructions.

According to a fourth aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon computer instructions which, when executed by a processor, perform the method of the first aspect above.

The method and the device have the advantages that before quality detection is conducted on the projection optical machine, the quality detection result is not affected by the testing environment through pre-testing of the first sample, in this case, quality detection is conducted on the projection optical machine, the influence of the testing environment on the quality detection result of the projection optical machine can be avoided, and accuracy of quality detection is improved. When the quality is detected, a first stable time point is determined through first detection, then a plurality of second sampling moments are determined before the first stable time point, and then a second test is carried out, so that the quality detection accuracy of the projection optical machine is improved, and meanwhile, the quality detection efficiency is improved.

Other features of the present specification and its advantages will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and together with the description, serve to explain the principles of the specification.

Fig. 1 is a schematic hardware configuration diagram of a quality detection apparatus of a projection light machine according to an embodiment of the present disclosure;

FIG. 2 is a flow chart of a method of quality detection of a projection light engine according to an embodiment of the disclosure;

FIG. 3 is a schematic illustration of a test area according to an embodiment of the present disclosure;

FIG. 4 is a graph of variation of the difference in modulation function of a first sample according to an embodiment of the present disclosure;

FIG. 5 is a graph of temperature change of an LED lamp of a first sample according to an embodiment of the present disclosure;

FIG. 6a is a graph of the modulation function of one of a plurality of test areas of a first sample according to an embodiment of the present disclosure;

FIG. 6b is a graph of the variation of the modulation function of another test zone of the plurality of test zones of the first sample according to an embodiment of the present disclosure;

FIG. 7 is a graph of a change in a first detected value of a projection light machine according to an embodiment of the present disclosure;

FIG. 8 is a graph of variation of a drop value of a first detection value of a projector according to an embodiment of the disclosure;

FIG. 9 is a graph of variation of a second detection value for a different projection light engine at one of the test areas in accordance with an embodiment of the present disclosure;

FIG. 10 is a functional block diagram of a quality detection device of a projection light engine according to an embodiment of the present disclosure;

fig. 11 is a schematic hardware configuration diagram of a quality inspection apparatus of a projection light machine according to an embodiment of the present disclosure.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the embodiments of the present disclosure unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. .

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

< hardware configuration >

Fig. 1 is a schematic structural diagram of an electronic device that may be used to implement embodiments of the present disclosure.

The electronic device 1000 may be a smart phone, a portable computer, a desktop computer, a tablet computer, a server, etc., and is not limited herein.

The electronic device 1000 may include, but is not limited to, a processor 1100, a memory 1200, an interface device 1300, a communication device 1400, a display device 1500, an input device 1600, a speaker 1700, a microphone 1800, and the like. The processor 1100 may be a central processing unit CPU, a graphics processor GPU, a microprocessor MCU, etc. for executing a computer program written in an instruction set of an architecture such as x86, arm, RISC, MIPS, SSE, etc. The memory 1200 includes, for example, ROM (read only memory), RAM (random access memory), nonvolatile memory such as a hard disk, and the like. The interface device 1300 includes, for example, a USB interface, a serial interface, a parallel interface, and the like. The communication device 1400 can perform wired communication using an optical fiber or a cable, or perform wireless communication, for example, and specifically can include WiFi communication, bluetooth communication, 2G/3G/4G/5G communication, and the like. The display device 1500 is, for example, a liquid crystal display, a touch display, or the like. The input device 1600 may include, for example, a touch screen, keyboard, somatosensory input, and the like. The speaker 1700 is for outputting audio signals. Microphone 1800 is used to collect audio signals.

The memory 1200 of the electronic device 1000 is used for storing a computer program for controlling the processor 1100 to operate to implement the method according to the embodiments of the present disclosure. The skilled person can design the computer program according to the disclosure of the present disclosure. How the computer program controls the processor to operate is well known in the art and will not be described in detail here. The electronic device 1000 may be installed with an intelligent operating system (e.g., windows, linux, android, IOS, etc. systems) and application software.

It will be appreciated by those skilled in the art that although a plurality of devices of the electronic device 1000 are shown in fig. 1, the electronic device 1000 of the embodiments of the present disclosure may involve only some of the devices thereof, for example, only the processor 1100 and the memory 1200, etc.

Various embodiments and examples according to the present invention are described below with reference to the accompanying drawings.

< method example >

Fig. 2 is a flow diagram of a method of projection quality detection of a projector according to an embodiment, which may be implemented by an electronic device in conjunction with the projector to be detected. For example, the electronic device may be electronic device 1000 as shown in FIG. 1.

As shown in fig. 2, the quality detection method of the projection optical bench provided in this embodiment may include the following steps S2100 to S2600.

In step S2100, during a first test process of displaying a first test image by projection of the projection optical engine, the first test image is collected at a set plurality of first sampling moments, so as to obtain a plurality of groups of first test images.

In this embodiment, in some scenarios, for example, before the projection light machine leaves the factory, a technician may perform quality detection on an image projected on the curtain by the projection light machine to determine whether the projection quality of the projection light machine is acceptable. Also for example, in case that a user needs to compare the projection quality of a plurality of different types of projection light machines to select the projection light machine with the best quality, quality detection may be performed on the different types of projection light machines to select the projection light machine with the best quality. In these scenarios, quality detection of the projection light engine is required. It should be understood by those skilled in the art that the quality detection scenario of the projection light engine is only exemplary of the present application and should not be taken as limiting the present application.

In one embodiment, the first sample is pre-tested prior to quality testing of the projection optics.

In this embodiment, before the quality detection of the projection optical machine, any one of the projection optical machines may be selected randomly to perform a pre-test to detect whether the test environment is qualified. For ease of description, a randomly selected projection light engine is labeled herein as the first sample.

In one embodiment, the first sample may be pre-tested by modulating a transfer function.

In this embodiment, before the first sample is pre-tested by the modulation transfer function, a plurality of test areas may be selected for the first sample, wherein the plurality of test areas includes a test area located at a projection center of the first sample, at least one test area located at a projection area of an upper left corner of the first sample, at least one test area located at a projection area of a lower left corner of the projection center, at least one test area located at a projection area of an upper right corner of the projection center, and at least one test area located at a projection area of a lower right corner of the projection center.

That is, a plurality of test areas may be selected for the first sample before the pre-test begins. For example, 26 test areas as shown in FIG. 3 may be selected.

In addition, before the pre-test is started, in the case that the electronic device establishes a communication connection with the first sample, the user can set the total duration of the pre-test and a plurality of third sampling moments by operating the electronic device.

And in the pre-test process, third test images are displayed through the first sample projection, and a plurality of groups of third test images of the third test images are collected through a camera of the electronic equipment at the plurality of third sampling moments. After the electronic device obtains the multiple groups of third test images, the electronic device can obtain the modulation transfer function values of each third test image in the multiple test areas, so as to obtain multiple groups of modulation transfer function values of the multiple groups of third test images.

For example, the third acquisition times are 0,3,5,8,10,13,15 minutes, and the test areas are the 26 selected test areas, so as to obtain a plurality of modulation transfer function values of the third test images. And, with the 26 test areas as the abscissa, the falling values of the modulation transfer function values of [ 0-3 ], [ 3-5 ], [ 5-8 ], [ 8-10 ], [ 10-13 ], [ 13-15 ] minutes are plotted as the ordinate, and the falling values of the modulation transfer function values of the 26 positions are plotted, as shown in fig. 4, it can be seen that the falling values of the time periods corresponding to the broken lines are within 1, that is, the falling values of the curves within [ 8-10 ] minutes are within 1.

To determine whether the temperature of the LED lamp will affect the change in the modulation transfer function value during the pre-test. In one embodiment, the temperature of the LED lamp of the first sample is obtained at the plurality of third sampling instants during the pre-test of the first sample.

Specifically, a heat sensitive element, such as a thermistor or the like, may be provided at the LED lamp of the first sample to detect the temperature of the LED lamp. In the pre-test process, the electronic device may acquire temperature values according to the plurality of third sampling moments to detect a temperature change condition of the LED lamp in the pre-test process.

For example, if the first sample is a 4LED projector, the thermosensitive elements may be provided for the 4LED lamps, respectively. And, at the total duration of the pre-test of 15 minutes, setting the third sampling time as follows: and 0,3,5,8,10,13,15 minutes, acquiring 10 times of temperature data at each third sampling time, and then generating a graph with the abscissa as the temperature measurement times and the ordinate as the temperature. The graph is shown in fig. 5. As can be seen from fig. 5, the 4LED lamps reach a stable temperature substantially within 3 minutes.

It can be seen that the fall value of the modulation transfer function stabilizes after the temperature of the LED lamp stabilizes, indicating that there are other factors that lead to a change in the modulation transfer function value. According to experimental analysis, a certain process of thermal expansion and contraction of the lens module of the projection optical machine is achieved, and the stabilization time of the lens module is approximately 10 minutes.

According to the embodiment of the application, in the pre-test process, the temperature of the LED lamp is detected, the time for stabilizing the temperature of the LED lamp is further determined, the stabilizing time is compared with the stabilizing time of the modulation transfer function, and the change of the modulation transfer function value is determined to be irrelevant to the temperature of the LED lamp.

In one embodiment, in order to avoid influencing accuracy of quality detection due to improper selection of a plurality of test areas, the embodiment of the present application further analyzes modulation transfer function values of each of the plurality of test areas during a pre-test process.

In this embodiment of the present application, the electronic device may further generate a change condition of each test area for the measurement number after the pre-test is ended. For example, during the pre-test, a third test image may be taken three times for each third sampling instant. That is, three third test images were taken at the time of 0,3,5,8,10,13,15 minutes, respectively, and 21 third test images were obtained in total. For each of the 26 test areas of each third test image, a modulation transfer function value is acquired. And generates a graph with the abscissa being the number of measurements (21 times) and the ordinate being any two test areas out of 26 test areas, it can be derived that the modulation transfer function values of the two test areas have a tendency to become larger or smaller with time.

According to the embodiment of the application, in the pre-test process, by analyzing the change condition of the modulation transfer function value along with the measurement time for each of the plurality of test areas, whether the set plurality of test areas are improperly selected or not can be determined, so that the accuracy of quality detection is prevented from being influenced due to improper selection of the test areas.

In one embodiment, the first sample is pre-tested a plurality of times, and after each pre-test is completed, the next pre-test is performed after the first sample is naturally cooled, and the ambient temperature is kept constant during each pre-test.

In this embodiment, the first sample may be pre-tested three times, and after each pre-test is completed, the next pre-test needs to be performed after the first sample is naturally cooled. And, during the pre-test, the ambient temperature was maintained at 25 degrees celsius.

According to the embodiment of the application, the problem of inaccurate test results caused by accidental factors can be avoided by carrying out the pre-test on the first sample for a plurality of times. By keeping the ambient temperature constant during the pre-test, the influence of the ambient temperature on the test result can be avoided, and the accuracy of the pre-test is improved.

After the test environment is determined to have no influence on the quality detection result through the pre-test, the quality detection of the projection optical machine can be performed. The quality detection of the projection optical machine comprises a first test and a second test. Before the first test is performed on the projection optical machine, under the condition that the electronic equipment and the projection optical machine are in communication connection, a user can input the total duration and the time interval of the first test through the electronic equipment. After receiving the total duration and the time interval of the first test input by the user, the electronic device may determine a plurality of first sampling moments according to the total duration and the time interval.

For example, the user may input a first test for a total duration of 15 minutes with a time interval of 3 minutes. The electronic device may determine that the plurality of first sampling moments are 0,3,5,8,10,13,15 minutes according to a total duration of 15 minutes and a time interval of 3 minutes.

After determining a plurality of first sampling moments, a user can control the projection optical machine to project and display a first test picture through the electronic equipment, and the first test is started. The first test picture may be a picture pre-stored in the projection optical machine before leaving the factory, or may be a picture sent to the projection optical machine by the electronic device when the projection optical machine and the electronic device are in communication connection, which is understood by those skilled in the art that the specific source of the first test picture is not limited herein.

In a first test process of projecting and displaying a first test picture by the projection optical machine, a camera of the electronic equipment respectively acquires the first test picture at a plurality of set first sampling moments to obtain a plurality of groups of first test images.

Step S2200, for each first sampling time, determining detection values of the projection optical machine at a plurality of set test areas according to the first test image corresponding to the first sampling time, and obtaining a plurality of first detection values corresponding to the first sampling time.

In this embodiment, when the electronic device obtains the plurality of sets of first test images, the electronic device may obtain a set plurality of test areas, and determine, for one of the plurality of first test images, a set of first detection values of the plurality of test areas of the first test image according to the plurality of test areas, so as to obtain a plurality of sets of first detection values for the plurality of sets of first test images.

In one embodiment, the first detection value is a modulation transfer function value of a lens module of the projection optical machine.

In this embodiment, the number of black line pairs and white line pairs in each of the plurality of test areas in the first test image may be obtained, and the percentage of the black line pairs and the white line pairs may be calculated, so as to obtain a first detection value of each test area of the first test image.

For example, the sampling time of the first test may be set as: at the

moment

0,3,5,10,15 minutes, the plurality of test areas of the first test are 26 test areas of the pre-test, after the camera of the electronic device acquires five first test images corresponding to the five moments, 26 first detection values can be determined for the 26 test areas of each first test image, and the 26 first detection values are used as a group of first detection values. Finally, five sets of first detection values corresponding to the five times can be obtained. As shown in fig. 7, a change chart of five sets of first detection values corresponding to the five obtained moments is obtained.

Step S2300, for adjacent sampling moments among the plurality of first sampling moments, obtaining detection data corresponding to the adjacent sampling moments according to the plurality of first detection values of the adjacent sampling moments; the detection data comprise a falling value of a first detection value of each test area at the adjacent sampling time.

Step S2400, determining a first stable time point of the projection optical bench according to a plurality of detection data corresponding to a plurality of adjacent sampling moments.

In this embodiment, after obtaining a set of first detection values corresponding to each first sampling time, two sets of first detection values at adjacent first sampling times may be subjected to a step value on a corresponding test area, so as to obtain detection data corresponding to adjacent sampling times. The electronic device may determine a first stable time point of the projection light engine according to a plurality of detection data corresponding to a plurality of adjacent sampling moments.

In one embodiment, a first threshold may be preset, and the first adjacent sampling time is determined to be a first stable time point when all of a plurality of detection data corresponding to a first adjacent sampling time in a plurality of detection data corresponding to the plurality of adjacent sampling times are less than or equal to the first threshold.

In this embodiment, among the plurality of detection data corresponding to the plurality of adjacent sampling moments, there may be a case where the plurality of detection data corresponding to the plurality of first adjacent sampling moments are all smaller than or equal to the first threshold value, and in this case, a relatively smaller one of the plurality of first adjacent sampling moments may be determined as the first stable time point.

For example, the first detection values of the 26 test areas at the time 3 and the first detection values of the 26 test areas at the time 0 may be subjected to a difference value on the corresponding test areas, so as to obtain detection data of the time period [ 0-3 ]. In the similar way, detection data of time periods of [ 3-5 ], 5-8 ], 8-10 ], 10-13 and 13-15 can be obtained. After a plurality of detection data are obtained, detection data corresponding to 26 detection areas can be obtained. The graph shown in fig. 8 has 26 test areas on the abscissa and detection data at adjacent sampling times on the ordinate. From this graph, it can be seen that the first stabilization time point is a time period of [ 8-10 ] minutes.

S2500, respectively acquiring the second test pictures at a plurality of second sampling moments before the first stable time point in a second test process of projecting and displaying the second test pictures by the projection optical machine, so as to obtain a plurality of groups of second test images.

In this embodiment, after the first stable time point of the projection light engine is determined by the first test, the second test may be performed on the projection light engine. Before performing the second test, the electronic device may determine a plurality of second sampling instants before the first stabilization point in time according to the first stabilization point in time. For example, in the case where the first stabilization time point is [ 8-10 ], the time before 8 minutes may be divided, and a plurality of second sampling times may be determined. For example, the first 7 minutes of 1,2,3,4,5,6,7 minutes may be taken as the second sampling instant.

After determining a plurality of second sampling moments, the projection optical machine can be controlled to project and display a second test picture so as to start a second test. Wherein the second test screen may be a different screen than the first test screen. The second test screen may be the same screen as the first test screen. It will be appreciated by those skilled in the art that the specific type and source of the second test frame is not limited herein.

In the second test process, the camera of the electronic device can acquire the second test pictures at a plurality of second sampling moments respectively to obtain a plurality of groups of second test images.

S2600, determining a quality detection result of the projection optical machine according to the plurality of groups of second test images.

In this embodiment, the electronic device may determine a quality detection result of the projection light machine according to the plurality of sets of second test images.

According to the embodiment of the application, before the quality detection of the projection optical machine is carried out, the quality detection result is not influenced by the testing environment through the pre-test of the first sample, and under the condition, the quality detection of the projection optical machine is carried out again, so that the influence of the testing environment on the quality detection result of the projection optical machine can be avoided, and the accuracy of the quality detection is improved. When the quality is detected, a first stable time point is determined through first detection, then a plurality of second sampling moments are determined before the first stable time point, and then a second test is carried out, so that the quality detection accuracy of the projection optical machine is improved, and meanwhile, the quality detection efficiency is improved.

In one embodiment, the obtaining the quality detection result of the projection optical bench according to the plurality of sets of second test images includes:

S3100, determining second detection values of the projection optical machine at first test areas in the plurality of test areas according to second test images corresponding to the second sampling moments to obtain a plurality of second detection values corresponding to the second sampling moments one by one;

in this embodiment, after obtaining multiple sets of second test images, the electronic device may select the first test area from the multiple test areas by a user. After the electronic device receives the first test area, the electronic device can acquire the percentage of the number of the black line pairs and the number of the white line pairs in the first test area in each second test image, and second detection values of the first test areas corresponding to the second sampling moments one by one are obtained. For example, a test area located at the projection center of the projection optical machine may be selected as the first test area, and a second test value of the center test area may be obtained.

S3200, determining a quality detection result of the projection optical machine according to the change condition of the second detection values.

In one embodiment, the determining the quality detection result of the projection optical machine according to the variation situations of the second detection values includes:

S4100, obtaining a second stable time point of the projection optical machine according to the change condition of the second detection values; wherein the second stable time point is a second sampling time point at which the amount of change of the plurality of second detection values from this time is less than or equal to a set threshold value;

s4200, obtaining the maximum drop value of the plurality of second detection values according to the change condition of the plurality of second detection values.

S4300, determining a quality detection result of the projection optical machine according to the second stable time point and the maximum drop value.

In this embodiment, a second threshold may be preset, and in a case where the amount of change of the plurality of second detection values from this time is less than or equal to the second threshold, a second sampling time corresponding to this time is determined as a second stable time point. And obtaining the maximum drop value of the plurality of second detection values according to the change condition of the plurality of second detection values after obtaining the second stable time point. And finally, determining a quality detection result of the projection optical machine according to the second stable time point and the maximum drop value. The smaller the second stable time point is, and the smaller the maximum drop value is, the better the quality of the projection light machine is.

For example, after quality detection is performed on a plurality of projection light machines, a relationship between the second detection value and the second sampling time is obtained as shown in fig. 9. It can be seen from this figure that the maximum drop value of the projection light machine of the highest curve is the smallest and tends to stabilize at a smaller moment than the other curves, i.e. the second stabilization time point is smaller, so that it can be determined that the quality of the projection light machine corresponding to this curve is relatively good.

According to the embodiment of the application, the quality detection result of the projection light machine is determined according to the second stable time point and the maximum drop value, so that the accuracy of quality detection of the projection light machine can be further improved, and a user can conveniently select the projection light machine with the best quality from a plurality of projection light machines.

In one embodiment, the first test screen and the second test screen are the same screen.

In this embodiment, since the test frames used in the first test and the second test of the quality detection are different, there may be a case where the second stabilization time point does not yet appear before the first stabilization time point in the second test, or a case where the maximum drop value of the second detection value is always less than or equal to the second threshold value. In this case, the quality detection result of the projection light machine cannot be accurately determined.

In order to avoid the influence on the accuracy of the quality detection result due to the change of the test frame, the second test frame and the first test frame in the embodiment of the application are the same frame.

According to the embodiment of the application, the first test picture and the second test picture are the same cambered surface, so that the influence on the accuracy of the quality detection result due to the change of the test pictures can be avoided.

< device example >

The embodiment of the disclosure provides a quality detection apparatus of a projection light machine, as shown in fig. 10, where the quality detection apparatus 600 of the projection light machine may include an acquisition module 610, a detection module 620, a calculation module 630, and a determination module 640.

The acquisition module 610 is configured to acquire, during a first test process in which the projection light machine projects and displays a first test picture, the first test picture at a set plurality of first sampling moments, so as to obtain a plurality of groups of first test images;

the detection module 620 is configured to determine, for each first sampling time, detection values of the projection optical bench at a plurality of set test areas according to a first test image corresponding to the first sampling time, so as to obtain a plurality of first detection values corresponding to the first sampling time;

a calculating module 630, configured to obtain, for adjacent sampling moments in the plurality of first sampling moments, detection data corresponding to the adjacent sampling moments according to the plurality of first detection values of the adjacent sampling moments; the detection data comprise drop values of first detection values of each test area at the adjacent sampling moments;

A determining module 640, configured to determine a first stable time point of the projection optical engine according to a plurality of detection data corresponding to a plurality of adjacent sampling moments;

the collection module 610 is configured to collect, during a second test process in which the projection light machine projects and displays a second test image, the second test image at a plurality of second sampling moments before the first stable time point, so as to obtain a plurality of groups of second test images;

the determining module 640 is configured to determine a quality detection result of the projection optical bench according to the multiple sets of second test images.

In one embodiment, the determining module 640 is specifically configured to determine, for each second sampling time, a second detection value of the projection optical engine at a first test area of the plurality of test areas according to a second test image corresponding to the second sampling time, so as to obtain a plurality of second detection values corresponding to the plurality of second sampling times one to one; and determining a quality detection result of the projection optical machine according to the change conditions of the second detection values.

In one embodiment, the determining module 640 is specifically configured to obtain a second stable time point of the projection optical engine according to the change situations of the plurality of second detection values; wherein the second stable time point is a second sampling time point at which the amount of change of the plurality of second detection values from this time is less than or equal to a set threshold value; obtaining the maximum drop value of the plurality of second detection values according to the change condition of the plurality of second detection values; and determining a quality detection result of the projection optical machine according to the second stable time point and the maximum drop value.

In one embodiment, the plurality of test areas includes a test area located at a projection center of the projection light engine, at least one test area located at a projection area of an upper left corner of the projection center, at least one test area located at a projection area of a lower left corner of the projection center, at least one test area located at a projection area of an upper right corner of the projection center, and at least one test area located at a projection area of a lower right corner of the projection center.

< device example >

Fig. 11 is a schematic hardware configuration diagram of a quality detection apparatus of a projection light machine according to an embodiment. As shown in fig. 11, the quality inspection device 700 of the projection light engine includes a display screen 710 and a camera module 720, and the quality inspection device 700 of the projection light engine further includes a processor 730 and a memory 740.

The memory 740 may be used to store executable computer instructions.

The processor 730 may be configured to perform a method for detecting quality of a projection light engine according to an embodiment of the method of the present disclosure according to control of the executable computer instructions.

The quality detecting apparatus 700 of the projection optical apparatus may be an electronic apparatus 1000 as shown in fig. 1, or may be an apparatus having another hardware configuration, and is not limited thereto. The quality detection device 700 of the projection optical machine may be a mobile phone, a notebook computer, a desktop computer, etc., which is not limited in the embodiments of the present disclosure.

< computer-readable storage Medium >

The disclosed embodiments also provide a computer readable storage medium having stored thereon computer instructions that, when executed by a processor, perform the method for quality detection of a projection light engine provided by the disclosed embodiments.

The present disclosure may be a system, method, and/or computer program product. The computer program product may include a computer readable storage medium having computer readable program instructions embodied thereon for causing a processor to implement aspects of the present disclosure.

The computer readable storage medium may be a tangible device that can hold and store instructions for use by an instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: portable computer disks, hard disks, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static Random Access Memory (SRAM), portable compact disk read-only memory (CD-ROM), digital Versatile Disks (DVD), memory sticks, floppy disks, mechanical coding devices, punch cards or in-groove structures such as punch cards or grooves having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media, as used herein, are not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., optical pulses through fiber optic cables), or electrical signals transmitted through wires.

The computer readable program instructions described herein may be downloaded from a computer readable storage medium to a respective computing/processing device or to an external computer or external storage device over a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmissions, wireless transmissions, routers, firewalls, switches, gateway computers and/or edge servers. The network interface card or network interface in each computing/processing device receives computer readable program instructions from the network and forwards the computer readable program instructions for storage in a computer readable storage medium in the respective computing/processing device.

Computer program instructions for performing the operations of the present disclosure can be assembly instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, c++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer readable program instructions may be executed entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, aspects of the present disclosure are implemented by personalizing electronic circuitry, such as programmable logic circuitry, field Programmable Gate Arrays (FPGAs), or Programmable Logic Arrays (PLAs), with state information of computer readable program instructions, which can execute the computer readable program instructions.

Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.

These computer readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer readable program instructions may also be stored in a computer readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer readable medium having the instructions stored therein includes an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.

The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. It is well known to those skilled in the art that implementation by hardware, implementation by software, and implementation by a combination of software and hardware are all equivalent.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. A method for quality detection of a projection light engine, the method comprising:

and determining a quality detection result of the projection optical machine according to the plurality of groups of second test images.

2. The method of claim 1, wherein obtaining the quality detection result of the projection light machine according to the plurality of sets of second test images includes:

3. The method of claim 2, wherein determining the quality detection result of the projection light engine according to the change condition of the plurality of second detection values includes:

4. A method according to any one of claims 1 to 3, wherein the first test picture and the second test picture are the same picture.

5. A method according to any one of claims 1 to 3, characterized in that the plurality of test areas comprises a test area located at a projection center of the projection light engine, at least one test area located at a projection area in an upper left corner of the projection center, at least one test area located at a projection area in a lower left corner of the projection center, at least one test area located at a projection area in an upper right corner of the projection center, and at least one test area located at a projection area in a lower right corner of the projection center.

6. A method according to any one of claims 1 to 3, wherein the first detection value is a modulation transfer function value of a lens module of the projection light engine.

7. A quality inspection device for a projection light engine, the device comprising:

8. The apparatus according to claim 7, wherein the determining module is specifically configured to determine, for each second sampling instant, a second detection value of the projection optical machine at a first test area of the plurality of test areas through a second test image corresponding to the second sampling instant, and obtain a plurality of second detection values corresponding to the plurality of second sampling instants one to one; and determining a quality detection result of the projection optical machine according to the change conditions of the second detection values.

9. A quality detection apparatus of a projection light machine, characterized in that the quality detection apparatus of a projection light machine comprises:

a memory for storing executable computer instructions;

a processor for performing the quality detection method according to any one of claims 1-6, under control of the executable computer instructions.

10. A computer readable storage medium having stored thereon computer instructions which, when executed by a processor, perform the method of any of claims 1-6.