Screen detection device and photoelectric detector

Abstract

The embodiment of the utility model provides a screen detection device and a photoelectric detector, relates to the technical field of communication, and is used for detecting whether screen flicker of a display screen of electronic equipment reaches the standard or not so as to effectively intercept the screen flicker problem in a production line. The screen detection device comprises a cabinet and a photoelectric detector. The cabinet is internally provided with a detection cavity which is used for accommodating electronic equipment. The photoelectric detector is used for collecting the screen brightness of the display screen and carrying out photoelectric conversion. The photoelectric detector is arranged in the detection cavity and connected with the cabinet, and the light incident side faces the display screen.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a screen detection device and a photodetector. Background Technology

[0002] With the development of communication technology, more and more electronic devices are appearing in people's lives. This has led to an increase in users' screen time and a growing demand for screen eye protection features. Screen flicker is a key factor in evaluating screen eye protection features and also a crucial factor affecting the post-market repair rate and Net Promoter Score (NPS) of electronic devices. In actual production, the Stroboscopic Visibility Measure (SVM) is used to measure whether the screen flicker of electronic devices meets the standards. However, cameras on production lines cannot quantify screen flicker; judgment must be made by the human eye during production. Compared to automated equipment, this method is highly subjective, inaccurate, and less efficient. Utility Model Content

[0003] This application provides a screen detection device and a photodetector for detecting whether the screen flicker of an electronic device meets the standard. It can effectively intercept electronic devices with substandard screen flicker on the production line, avoiding the problems of strong subjectivity, poor accuracy and low efficiency of manual detection.

[0004] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0005] A first aspect of this application provides a screen detection device, including a cabinet and a photodetector. The screen detection device is used to detect the display screen of an electronic device. A detection cavity is provided within the cabinet to house the electronic device and the photodetector. The photodetector is disposed within the detection cavity and connected to the cabinet. The light-incident side of the photodetector faces the display screen and is used to collect the screen brightness of the display screen and perform photoelectric conversion.

[0006] When the screen testing device is operational, the electronic device is placed into the cabinet testing chamber, with the light-incident side of the photodetector facing the display screen. The photodetector collects the light signal emitted by the display screen and converts it into an electrical signal. Based on the electrical signal, the screen testing device can provide a screen flicker test conclusion for the electronic device. Based on the screen flicker test conclusion, electronic devices that fail to meet the flicker standard can be intercepted on the production line through numerical control. The screen testing device provided in this application embodiment can achieve quantifiable automated screen flicker testing on the production line. It can test the display screens of electronic devices one by one on the production line, ensuring the consistency of screen flicker performance of electronic devices entering the market, guaranteeing product quality, and avoiding the problems of subjective bias, poor accuracy, and low efficiency of manual testing.

[0007] In some embodiments, the screen detection device further includes a probe bracket. The probe bracket is disposed within the detection cavity and connected to the cabinet. The probe bracket is used to mount a photodetector. The probe bracket also has a mounting hole. A portion of the photodetector passes through the mounting hole and connects to the probe bracket. In this way, the probe bracket can fix the photodetector within the detection cavity, providing support for the photodetector. Mounting via the probe bracket facilitates the assembly, disassembly, and maintenance of the photodetector. At least the light-incident side of the photodetector passes through the mounting hole, facilitating the photodetector's acquisition of light signals.

[0008] In one possible implementation, the probe bracket includes a support plate and a light-shielding plate. Mounting holes are formed on the support plate. The support plate is connected to the cabinet and the photodetector. The light-shielding plate is located on the side of the support plate and connected to it. The light-shielding plate extends along the side of the photodetector where the light incident on it is located. In this way, the support plate is used to fix the photodetector inside the detection cavity, and the light-shielding plate blocks light signals from outside the display screen, ensuring more accurate light signals collected by the photodetector.

[0009] In one possible implementation, the support plate has a rectangular surface; the probe bracket has five mounting holes, namely four first mounting holes and one second mounting hole; the vertical projections of the four first mounting holes onto the support plate surface are located at the four corners of the rectangle; the four first mounting holes surround the perimeter of the second mounting hole. In this way, the shape of the support plate is the same as the typical external outline of the electronic device (e.g., rectangular). When the probe bracket includes a light-shielding plate, the rectangular support plate, in conjunction with the light-shielding plate, can adapt to the external outline of the electronic device, better achieving the light-shielding effect. Five photodetectors can be installed in the five mounting holes, with the photodetectors passing through the mounting holes at least on the light-incident side to collect the light signal from the display screen.

[0010] Understandably, the light signal distribution is more uniform in the central area of ​​an electronic device's display screen. One second mounting hole can collect the light signal from the center of the display screen, while four first mounting holes can collect the light signal from the four corners. Using only the photodetectors on the second mounting holes to collect the light signal from the center of the display screen is more cost-effective. Using five photodetectors simultaneously to collect the light signals from all five areas of the display screen and combining the results yields more reliable data, especially suitable for larger displays.

[0011] In some embodiments, the screen inspection device further includes: a cabinet fixture disposed within the inspection cavity and located on the light-incident side of the photodetector; the cabinet fixture has a groove for accommodating electronic devices, and the cabinet fixture is used to connect with the electronic devices. In this way, the groove can be used to position the electronic devices, so that each electronic device to be inspected is in the same position during the inspection state, thus better ensuring the consistency of the inspection environment for all electronic devices.

[0012] In some embodiments, the cabinet has a slide rail communicating with the detection cavity. The slide rail is located on the light-incident side of the photodetector. The screen detection device further includes a pull-out structure. A portion of the pull-out structure extends into the slide rail and is slidably or rotatably connected to the cabinet. A cabinet clamp is disposed on the portion of the pull-out structure located within the slide rail. In this way, the portion of the pull-out structure located within the slide rail can move relative to the slide rail and exit the detection cavity. The movement of the portion of the pull-out structure located within the slide rail can drive the cabinet clamp fixed to the portion of the pull-out structure located within the slide rail to move. The cabinet clamp can exit the detection cavity, facilitating the fixing of the electronic device under test onto the cabinet clamp.

[0013] In some embodiments, the screen testing device includes at least two photodetectors and at least two cabinet clamps; the vertical projection of one photodetector onto the portion of the pull-out structure located within the slide rail is within the range of the vertical projection of the recess of one cabinet clamp onto the portion of the pull-out structure located within the slide rail. This ensures that when the electronic device under test is fixed to the cabinet clamp and located within the testing cavity, the photodetector is directly facing the display screen.

[0014] In some embodiments, the probe bracket includes a support plate with mounting holes; the support plate is connected to the cabinet and the photodetector; the vertical projection of the support plate on the portion of the pull-out structure located within the slide rail completely covers the vertical projection of the groove on the portion of the pull-out structure located within the slide rail. In this way, when the electronic device under test is fixed on the cabinet fixture and located within the detection chamber, the support plate of the probe bracket completely covers the display screen, ensuring the light-shielding function of the probe bracket.

[0015] In some embodiments, the screen testing device further includes an oscilloscope and a processor. Both the oscilloscope and the processor are housed within a cabinet. The oscilloscope is electrically connected to the output of a photodetector. The processor is electrically connected to both the oscilloscope and the electronic device. The oscilloscope can further process the electrical signal output by the photodetector. The oscilloscope can convert the analog signal output by the photodetector into a digital signal, providing a data basis for subsequent calculation of the measured value of screen flicker in the electronic device. The oscilloscope can also perform noise reduction and bandwidth limiting on the signal output by the photodetector. The processor can further process the electrical signal output by the oscilloscope. The processor can use the digital signal output by the oscilloscope to calculate the measured value of screen flicker in the electronic device, determine whether the measured value of screen flicker is within the specification requirements, and thus provide a conclusion on the screen flicker test of the electronic device.

[0016] In some embodiments, the photodetector includes: a first circuit board, a second circuit board, a power supply interface, a signal output interface, signal processing components, and a photodetector. The first circuit board and the second circuit board are stacked and electrically connected. The power supply interface is disposed on and electrically connected to the first circuit board. The signal output interface is disposed on and electrically connected to the second circuit board. The signal processing components are disposed on the second circuit board and electrically connected to the power supply interface via the second circuit board and the first circuit board. The photodetector is disposed on the second circuit board. The light-incident surface of the photodetector serves as the light-incident side of the photodetector, and the light-incident surface is disposed away from the second circuit board. The signal processing components are connected between the photodetector and the signal output interface.

[0017] In this configuration, the photoelectric sensor collects light signals from the display screen and converts them into a first electrical signal. The signal processing components receive the first electrical signal output from the photoelectric sensor, process it, and output a second electrical signal. The second circuit board outputs the second electrical signal to the processing unit of the screen detection device via a signal output interface. The first circuit board is connected to an external power supply via a power supply interface to power all components in the photoelectric detector.

[0018] In some embodiments, the power supply interface is located on the side of the first circuit board facing away from the second circuit board; the second circuit board has a first surface facing the first circuit board and a second surface facing away from the first circuit board; the signal output interface is located on the first surface; and the photodetector and signal processing components are located on the second surface. The direction perpendicular to the first circuit board is defined as the vertical direction. In this way, the first and second circuit boards can be stacked, and the power supply interface and signal output interface can share the vertical space. This saves space in the vertical direction of the photodetector, thus facilitating the miniaturization design of the photodetector.

[0019] In some embodiments, the photodetector further includes a housing and a cover. The housing has a mounting groove. The cover covers the opening of the mounting groove and, together with the mounting groove, forms a receiving cavity. A first circuit board, a second circuit board, and signal processing components are located within the receiving cavity. At least a portion of the power supply interface is located within the receiving cavity. At least a portion of the signal output interface is located within the receiving cavity. A portion of the photodetector is located within the receiving cavity, and the light-incident surface of the photodetector is located outside the housing. In this way, the housing and cover cover the functional components of the photodetector, providing waterproof and moisture-proof protection against external environmental influences. A portion of the power supply interface is located within the receiving cavity, and the other portion penetrates the housing for connection to an external power source. A portion of the signal output interface is located within the receiving cavity, and the other portion penetrates the housing for connection to the processing components of the screen detection device. The photodetector being located within the receiving cavity with its light-incident surface outside the housing facilitates the acquisition of light signals.

[0020] In some embodiments, an adjustment hole is provided on the cover. The photodetector includes at least two signal processing components: a filter amplifier and an impedance matching device. The filter amplifier is electrically connected between the photodetector and the impedance matching device. The impedance matching device is also electrically connected to the signal output interface. The screen detection device also includes an impedance adjustment knob for adjusting the impedance matching value of the impedance matching device. The impedance adjustment knob is disposed on the second circuit board and electrically connected to the impedance matching device. The impedance adjustment knob passes through the first circuit board and is exposed in the adjustment hole. In this way, the impedance matching of the photodetector can be adjusted by the impedance matching adjustment knob, making the photodetector compatible with various oscilloscope devices.

[0021] In some embodiments, a first light-transmitting hole is provided on the cover. The photodetector also includes an LED, which is disposed on the first circuit board and electrically connected to the first circuit board and the power supply interface. A portion of the LED is exposed in the first light-transmitting hole. In this way, the LED lights up when the power supply is normal and turns off when the power supply is not normal. If the LED lights up but the photodetector does not work properly, the cause of the power supply abnormality can be ruled out.

[0022] In some embodiments, a portion of the signal output interface and at least a portion of the power supply interface are stacked on the side of the first circuit board facing away from the second circuit board; the side of the signal output interface facing away from the second circuit board has a first gap H1 with the cover; the side of the power supply interface facing away from the second circuit board has a second gap H2 with the cover; the photodetector also includes at least one support post located within the receiving cavity; one end of the support post abuts against the second circuit board, and the other end of the support post is connected to the cover; the height of the support post is H3; wherein, H3 > H1; H3 > H2. In this way, the height H3 of the support post is greater than the vertical spaces H1 and H2 required for the power supply interface and the signal output interface, ensuring the normal installation of the photodetector.

[0023] In some embodiments, the power supply interface is a Type-C interface or a USB interface. This allows the photodetector to use a universal interface for external power supply, improving its maintainability and making it more convenient for users.

[0024] In some embodiments, the photodetector further includes a first connector that penetrates the cover, the support column, and the second circuit board, and connects to the housing. In this way, the first connector can fix the cover, the support column, the second circuit board, and the housing, allowing the photodetector to be fixedly installed using only one connection structure. This facilitates the miniaturization design of the photodetector.

[0025] In some embodiments, the photodetector further includes a second connector extending through the first circuit board and the second circuit board. In this way, the second connector can fix the first circuit board and the second circuit board, facilitating the stacking of the first and second circuit boards.

[0026] In some embodiments, the photodetector further includes: a protective cover, disposed on the side of the photodetector away from the housing, the protective cover being connected to the housing; the protective cover has a second light-transmitting hole, the second light-transmitting hole exposing the light-receiving surface. In this way, the protective cover can protect the light-receiving surface of the sensor located outside the housing, and the light-receiving surface of the photodetector can collect light signals through the second light-transmitting hole.

[0027] A second aspect of this application provides a photodetector, including: a first circuit board, a second circuit board, a power supply interface, a signal output interface, a signal processing component, and a photodetector. The first circuit board and the second circuit board are stacked and electrically connected. The power supply interface is disposed on and electrically connected to the first circuit board. The signal output interface is disposed on and electrically connected to the second circuit board. The signal processing component is disposed on the second circuit board and electrically connected to the power supply interface via the second circuit board and the first circuit board. The photodetector is disposed on the second circuit board. The light-incident surface of the photodetector serves as the light-incident side of the photodetector, and the light-incident surface is disposed away from the second circuit board. The signal processing component is connected between the photodetector and the signal output interface.

[0028] In this configuration, the photoelectric sensor collects light signals from the display screen and converts them into a first electrical signal. The signal processing components receive the first electrical signal output from the photoelectric sensor, process it, and output a second electrical signal. The second circuit board outputs the second electrical signal to the processing unit of the screen detection device via a signal output interface. The first circuit board is connected to an external power supply via a power supply interface to power all components in the photoelectric detector.

[0029] The photodetector provided in this application embodiment can be applied to various scenarios where optical signals are converted into electrical signals. Because the first and second circuit boards are stacked, the space occupied by the first and second circuit boards in the vertical direction can be reduced, achieving a miniaturized design of the photodetector and making the photodetector suitable for more application scenarios.

[0030] In some embodiments, the power supply interface is disposed on the side of the first circuit board away from the second circuit board; the second circuit board has a first surface facing the first circuit board and a second surface away from the first circuit board; the signal output interface and signal processing components are located on the first surface; and the photodetector is located on the second surface. In this way, the functional structures of the second circuit board and the first circuit board are disposed on two surfaces that are opposite to each other, which facilitates the stacking of the second circuit board and the first circuit board, and thus is beneficial to the miniaturization design of the photodetector. Attached Figure Description

[0031] Figure 1 This application provides a schematic diagram of the structure of a server rack.

[0032] Figure 2 This is a schematic diagram of the structure of a photodetector provided in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0034] Figure 4 An exploded view of a structure for a photodetector mounted on a probe bracket, as provided in an embodiment of this application;

[0035] Figure 5 This is a schematic diagram of a probe bracket provided in an embodiment of the present application. The probe bracket has a mounting hole.

[0036] Figure 6 This is a schematic diagram of a probe bracket provided in an embodiment of the present application. The probe bracket has five mounting holes.

[0037] Figure 7 An exploded view of a structural schematic diagram of an electronic device mounted on a cabinet fixture, as provided in an embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the structure of a cabinet clamp provided in an embodiment of this application. The size of the groove on the cabinet clamp is fixed.

[0039] Figure 9A This is a schematic diagram of the structure of a cabinet clamp provided in an embodiment of this application. The size of the groove on the cabinet clamp can be changed.

[0040] Figure 9B for Figure 9A A schematic diagram of the structure after the size of the cabinet clamp groove has been changed;

[0041] Figure 10 This is a schematic diagram of a cabinet structure provided in an embodiment of this application. The cabinet's detection cavity has a slide rail.

[0042] Figure 11This is a schematic diagram of the structure of a cabinet provided in an embodiment of the present application. The cabinet is provided with a pull-out structure, which is connected to the detection cavity by sliding or rolling through a slide rail.

[0043] Figure 12A This is a schematic diagram of the structure of a cabinet provided in an embodiment of the present application. The cabinet is equipped with two cabinet clamps and two photoelectric detectors.

[0044] Figure 12B for Figure 12A Top view;

[0045] Figure 13A This is a schematic diagram of the structure of a cabinet provided in an embodiment of this application. The photodetector is mounted on the probe bracket, and the vertical projection of the support plate on the pull-out structure completely covers the vertical projection of the groove on the pull-out structure.

[0046] Figure 13B for Figure 13A Top view;

[0047] Figure 14 This is a schematic diagram of a cabinet structure provided in an embodiment of the present application. The cabinet is equipped with an oscilloscope and a processor.

[0048] Figure 15 A block diagram of a processor implemented by a circuit structure, provided for an embodiment of this application;

[0049] Figure 16 This is a schematic diagram of the structure of a photodetector provided in an embodiment of this application;

[0050] Figure 17 This is a schematic diagram illustrating the working process of a photodetector provided in an embodiment of this application;

[0051] Figure 18 This is a schematic diagram of the working process of a photodetector provided in an embodiment of the present application. The first circuit board includes a boost power supply module, and the second circuit board includes an impedance matching module and a filtering and amplification module.

[0052] Figure 19 A schematic diagram of a structure in which a first circuit board and a second circuit board are connected by a second connector, as provided in an embodiment of this application;

[0053] Figure 20 This is a schematic diagram of the structure of a photodetector with a housing and a cover, provided in an embodiment of this application.

[0054] Figure 21 This is a schematic diagram of the structure of a photodetector with an impedance adjustment knob provided in an embodiment of this application;

[0055] Figure 22A circuit diagram illustrating the impedance matching module of a photodetector provided in an embodiment of this application;

[0056] Figure 23 This is a schematic diagram of the structure of a photodetector with LED beads provided in an embodiment of this application;

[0057] Figure 24 A schematic diagram of a photodetector with a support column provided in an embodiment of this application;

[0058] Figure 25 An exploded view of a photodetector fixedly connected via a first connector, as provided in an embodiment of this application.

[0059] Figure 26 This is a flowchart illustrating a method for screen flicker detection using a screen detection device and a photodetector, as provided in an embodiment of this application.

[0060] Figure label:

[0061] 01-Rack; 011-Detection cavity; 012-Pull-out structure; 013-Slide rail; 02-Photodetector; 020-Light incident side; 021-First circuit board; 0211-Power supply interface; 0212-LED bead; 022-Second circuit board; 022A-First surface; 022B-Second surface; 0221-Signal output interface; 0222-Signal processing components; 0223-Impedance adjustment knob; 023-Photodetector; 0231-Light incident surface; 024-Housing shell; 0241-Receiving cavity; 0242-First opening; 0243-Second opening; 0244-Third opening; 025-Cover; 0251-Adjustment hole; 0252-Light transmission hole; 026 - Protective cover; 0261 - Second light-transmitting hole; 027 - Support column; 028 - First connector; 0281 - First connection hole; 029 - Second connector; 0291 - Second connection hole; 03 - Electronic equipment; 031 - Display screen; 04 - Probe bracket; 041 - Support plate; 042 - Light shield; 043 - Mounting hole; 0431 - First mounting hole; 0432 - Second mounting hole; 05 - Cabinet clamp; 051 - Groove; 05A - First part; 05B - ​​Second part; 05C - Third part; 05D - Fourth part; 06 - Processing equipment; 061 - Oscilloscope; 062 - Processor; 0611 - First operation panel; 0621 - Second operation panel. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0063] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more. The term "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0064] Furthermore, in this application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0065] Screen flicker is a key factor in evaluating screen eye protection features and also significantly impacts post-market repair rates and Net Promoter Score (NPS) of electronic devices. In actual production, Screen Flicker Monitoring (SVM) is used to measure whether screen flicker meets standards. However, production line cameras cannot quantify screen flicker; judgment must be made visually during production. Compared to automated equipment, this approach is highly subjective, inaccurate, and inefficient. Therefore, achieving quantifiable screen flicker testing on the production line is a pressing issue that needs to be addressed.

[0066] To address the aforementioned problems, this application provides a screen detection device that can be used in various spectral detection scenarios. In this embodiment, the screen detection device is described as being applied to a production line to measure screen flicker. This electronic device enables quantifiable screen flicker testing on the production line, effectively intercepting screen flicker problems.

[0067] This application provides a screen detection device, including a cabinet and a photodetector, for detecting the display screen of electronic devices.

[0068] like Figure 1 As shown, a detection cavity 011 is provided inside the cabinet 01. The detection cavity 011 is used to house the electronic device 03 and the photodetector 02. Figure 2 As shown, the photodetector 02 includes an incident light side 020. (As...) Figure 3 As shown, electronic device 03 includes display screen 031.

[0069] For ease of description, xyz coordinate axes are established in the attached figure. The z direction can be perpendicular to the light-incident side 020 of the photodetector 02, and the xy plane formed by the x and y directions can be parallel to the light-incident side 020 of the photodetector 02. The x direction is the extension direction of the detection cavity 011.

[0070] Combination Figures 1 to 3 A photodetector 02 is disposed within the detection cavity 011 and connected to the cabinet 01. The light-incident side 020 of the photodetector 02 faces the display screen 031 of the electronic device 03. The photodetector 02 is used to collect the screen brightness of the display screen 031 and perform photoelectric conversion.

[0071] When the screen detection device is in operation, the electronic device 03 is adjusted to a specified screen brightness and display image, and then the electronic device 03 is placed into the detection chamber 011, with the light-incident side of the photodetector 02 facing the display screen 031 of the electronic device 03. The photodetector 02 collects the light signal emitted by the display screen 031 and converts the light signal into an electrical signal. Based on the electrical signal, the screen detection device can provide a screen flicker test conclusion for the electronic device 03. Based on the screen flicker test conclusion, electronic devices 03 that fail to meet the screen flicker standard can be intercepted on the production line through numerical control.

[0072] This application does not limit the type of electronic device; the electronic device can be any device with a screen, including but not limited to: mobile phones, tablets, smartwatches, etc.

[0073] This application does not limit the method of adjusting the electronic device to a specified screen brightness and specified image. It can be adjusted by the user directly operating the electronic device, or by sending an external command to the electronic device through a screen detection device.

[0074] The screen testing device provided in this application embodiment can achieve quantifiable automated screen flicker testing on the production line. It can test the displays of electronic devices one by one on the production line, ensuring the consistency of screen flicker performance of electronic devices entering the market, guaranteeing product quality, and avoiding the problems of subjective bias, poor accuracy, and low efficiency of manual testing.

[0075] This application does not limit the way the photodetector is placed inside the detection cavity and connected to the cabinet. The photodetector can be installed on the cabinet's own structure or indirectly connected to the cabinet through other structures.

[0076] In some embodiments, such as Figure 4As shown, the screen detection device also includes a probe bracket 04. The probe bracket 04 is disposed within the detection cavity and connected to the cabinet. The probe bracket 04 is used to mount the photodetector 02. The photodetector 02 can be indirectly connected to the cabinet via the probe bracket 04. The probe bracket 04 also has a mounting hole 043. A portion of the photodetector 02 passes through the mounting hole 043 and is connected to the probe bracket 04 through the mounting hole 043. In this way, the probe bracket 04 can fix the photodetector 02 within the detection cavity, providing support for the photodetector 02. Mounting via the probe bracket 04 facilitates the disassembly, assembly, and maintenance of the photodetector 02. At least the light-incident side of the photodetector passes through the mounting hole, facilitating the photodetector's acquisition of light signals.

[0077] This application does not limit the form of the probe bracket. The probe bracket can be an adjustable bracket or a fixed bracket. When the probe bracket is an adjustable bracket, the position of the photodetector can be adjusted using the probe bracket. When the probe bracket is a fixed bracket, the position of the photodetector can be fixed, controlling the light signal collected by the photodetector to come from the same area of ​​different screens. For ease of explanation, the following description uses a fixed bracket as the example.

[0078] This application does not limit the material of the probe bracket. The probe bracket can be made of opaque plastic or other materials that provide light shielding and do not interfere with the operation of the display screen.

[0079] As can be seen from the above, the probe bracket can fix the photodetector. The structure of the probe bracket will be illustrated below with an example.

[0080] In one possible implementation, such as Figure 5 As shown, the probe bracket 04 includes a support plate 041 and a light-shielding plate 042. A mounting hole 043 is formed in the support plate 041. The support plate 041 and... Figure 1 Rack 01 and Figure 2 The photodetector 02 is connected. A light-shielding plate 042 is located on the side of the support plate 041 and connected to it. The light-shielding plate 042 extends along the side where the incident light side 020 of the photodetector 02 is located (i.e., along...). Figure 5 (Extending in the opposite direction of the z-direction). In this way, the support plate 041 can fix the photodetector 02 inside the detection cavity 011, and the light shield 042 can block the light signal outside the display screen 031, ensuring that the light signal collected by the photodetector 02 is more accurate.

[0081] This application does not limit the shape of the support plate in its embodiments. For example, the surface of the support plate can be circular, rectangular, or irregular in shape. When the surface of the support plate is rectangular, the shape of the support plate is the same as the typical outline shape of the electronic device (e.g., rectangular). When the probe bracket includes a light shield, the rectangular support plate, in conjunction with the light shield, can adapt to the outline of the electronic device, thus better achieving the light shielding effect.

[0082] The embodiments of this application do not limit the number of light-shielding plates. For ease of explanation, as shown below... Figure 5 As shown, the explanation uses two light-shielding plates 042. The two light-shielding plates 042 are parallel to... Figure 1 The x-direction shown can block light from outside the detection cavity 011.

[0083] In one possible implementation, such as Figure 6 As shown, the support plate 041 has a rectangular surface. The probe bracket 04 has five mounting holes: four first mounting holes 0431 and one second mounting hole 0432. The vertical projections of the four first mounting holes 0431 onto the support plate 041 are located at the four corners of the rectangle. The four first mounting holes 0431 surround the second mounting hole 0432. In this way, five photodetectors can be installed in the five mounting holes to collect the light signals from the display screen.

[0084] Understandably, the light signal distribution is more uniform in the central area of ​​an electronic device's display screen. One second mounting hole can collect the light signal from the central area, while four first mounting holes can collect the light signals from the four corners of a rectangular display screen. Using only the photodetectors on the second mounting holes to collect the light signal from the center of the display screen is more cost-effective. Simultaneously using five photodetectors to collect the light signals from all five areas of the display screen and combining the results yields more reliable data, especially suitable for larger displays.

[0085] This application does not limit the number of mounting holes. Optionally, the number of mounting holes may be one or five.

[0086] This application does not limit the method by which the electronic device is placed within the detection cavity. The electronic device can be installed on the rack's own structure, for example, by directly creating a mounting slot at the bottom of the detection cavity to accommodate the electronic device. The electronic device can also be indirectly connected to the rack through other structures, such as by mounting the electronic device on a rack fixture, which is connected to the rack.

[0087] In some embodiments, such as Figure 7As shown, the screen inspection device also includes a cabinet fixture 05. The cabinet fixture 05 is disposed within the inspection cavity and located on the light-incident side 020 of the photodetector 02. The cabinet fixture 05 has a recess 051 for accommodating electronic devices 03. The cabinet fixture 05 is used to connect with the electronic devices 03. In this way, the recess 051 can be used to position the electronic devices 03, ensuring that each electronic device 03 to be inspected is in the same position during inspection, thus better ensuring the consistency of the inspection environment for all electronic devices 03.

[0088] In one possible implementation, such as Figure 8 As shown, the cabinet fixture 05 has a recess 051 for accommodating electronic equipment. The recess 051 accommodates the electronic equipment by snap-fitting. The size of the recess 051 is adapted to the size of the electronic equipment. This is suitable for scenarios where electronic equipment with the same screen size as the production line is being inspected.

[0089] In another possible implementation, such as Figure 9A and Figure 9B As shown, the cabinet fixture 05 is divided into four detachable parts: part 05A, part 05B, part 05C, and part 05D. Parts 05A, 05B, 05C, and 05D form a recess 051 for accommodating electronic equipment. The size of the recess 051 can be changed by adjusting the gaps m and n between the four parts. This is suitable for production line scenarios where electronic equipment with different screen sizes is being inspected. For example, parts 05A, 05B, 05C, and 05D can be fixed to the four jaws of a four-jaw chuck. The movement of the four-jaw chuck can drive the movement of the four parts of the fixture, thereby changing the gaps m and n.

[0090] This application does not limit the arrangement of the detection cavity in the cabinet. The detection cavity can be a cavity that runs through the cabinet, or it can be a cavity that only opens on one side of the cabinet.

[0091] In some embodiments, such as Figure 10 As shown, the cabinet 01 has a slide rail 013 that communicates with the detection chamber 011. The slide rail 013 is located on the light-incident side of the photodetector 02. Figure 11As shown, the screen testing device also includes a pull-out structure 012. A portion of the pull-out structure 012 extends into the slide rail 013 and is slidably or rollably connected to the cabinet 01. A cabinet clamp 05 is disposed on the portion of the pull-out structure 012 located within the slide rail. The portion of the pull-out structure located within the slide rail can move relative to the slide rail and exit the testing cavity. The movement of the portion of the pull-out structure located within the slide rail can drive the cabinet clamp fixed on the portion of the pull-out structure located within the slide rail to move. In response to user operation, the cabinet clamp 05 can be sent out of the testing cavity through the pull-out structure 012, facilitating the fixing of the electronic device under test onto the cabinet clamp 05. At this time, the testing cavity 011 can be a cavity with an opening only on one side of the cabinet 01.

[0092] It is understandable that the pull-out structure can be replaced by a structure with the same function. For example, in some embodiments, the cabinet has a slide rail communicating with the detection cavity. The slide rail is located on the light-incident side of the photodetector. The screen detection device also includes a conveyor belt. The cabinet fixture is mounted on the conveyor belt. In response to user operation, the cabinet fixture can be moved out or into the detection cavity via the conveyor belt. In this case, the detection cavity can be a cavity that penetrates the cabinet.

[0093] This application does not limit the number of photodetectors and cabinet fixtures in the screen inspection device. When there are multiple photodetectors and cabinet fixtures, the screen inspection device can simultaneously inspect the displays of multiple electronic devices. It is understood that one cabinet fixture corresponds to at least one electronic device, and one electronic device corresponds to at least one photodetector.

[0094] In some embodiments, such as Figure 12A As shown, the screen detection device includes at least two photodetectors 02 and at least two cabinet clamps 05, the cabinet clamps 05 being installed in the pull-out structure ( Figure 12A (Not shown in the middle) Above. For example... Figure 12B As shown, Figure 12A The vertical projection of a photodetector 02 on the portion of the pull-out structure 012 located within the slide rail is within the range of the vertical projection of the corresponding recess 051 of a cabinet fixture 05 on the portion of the pull-out structure 012 located within the slide rail. This ensures that when the electronic device under test is fixed on the cabinet fixture 05 and located within the detection cavity 011, the photodetector 02 is directly facing the display screen.

[0095] In some embodiments, such as Figure 13A As shown, the probe bracket 04 includes a support plate 041 with mounting holes 043. The support plate 041 is connected to the cabinet 01 and the photodetector 02. The cabinet clamp 05 is installed in the pull-out structure ( Figure 13A (Not shown in the middle) Above. For example... Figure 13B As shown, Figure 13AThe vertical projection of the support plate 041 on the portion of the pull-out structure located within the slide rail completely covers the vertical projection of the groove on the portion of the pull-out structure located within the slide rail. In this way, when the electronic device under test is fixed on the cabinet fixture and located within the detection chamber, the support plate of the probe bracket completely covers the display screen, ensuring the light-shielding function of the probe bracket.

[0096] In some embodiments, such as Figure 14 As shown, the screen detection device also includes an oscilloscope 061 and a processor 062. Both the oscilloscope 061 and the processor 062 are housed within cabinet 01. The oscilloscope 061 is electrically connected to the output of the photodetector 02. The processor 062 is electrically connected to the oscilloscope 061 and the electronic device 03. The oscilloscope 061, electrically connected to the photodetector 02, can further process the electrical signal output by the photodetector 02. The oscilloscope 061 can convert the analog signal output by the photodetector 02 into a digital signal, providing a data basis for subsequent calculation of the screen flicker measurement value of the electronic device 03. The oscilloscope 061 can also perform noise processing and bandwidth limiting on the signal output by the photodetector 02. The processor 062, electrically connected to the oscilloscope 061, can further process the electrical signal output by the oscilloscope 061. The processor can use the digital signal output by the oscilloscope to calculate the measured value of the screen flicker of the electronic device, determine whether the measured value of the screen flicker is within the specification requirements, and thus give a conclusion on the screen flicker test of the electronic device.

[0097] In one possible implementation, continue as follows Figure 14 As shown, the oscilloscope 061 includes a first operation panel 0611, and the processor 062 includes a second operation panel 0621. The first operation panel 0611 and the second operation panel 0621 are located on the surface of the cabinet 01. Users can set parameters of the screen detection device, such as specifications for screen flicker measurement values, through the first operation panel 0611 and the second operation panel 0621. Users can observe the screen flicker test results of the electronic device through the first and second displays on the first operation panel 0611 and the second operation panel 0621.

[0098] Understandably, oscilloscopes and processors can be installed independently of the server rack.

[0099] In one possible implementation, the oscilloscope and processor can achieve functionality through circuit structure. For example... Figure 15As shown, processor 062 includes: a waveform conversion circuit, a calculation circuit, a comparison circuit, and an output circuit. The waveform conversion circuit is electrically connected to oscilloscope 061. The waveform conversion circuit converts the time-domain brightness waveform output by oscilloscope 061 into a frequency-domain waveform. The calculation circuit is electrically connected to the waveform conversion circuit. The calculation circuit normalizes the data of the frequency-domain waveform to obtain quantized flicker characteristic values. The comparison circuit is electrically connected to both the calculation circuit and the waveform conversion circuit. The comparison circuit determines whether the quantized flicker characteristic value output by the calculation circuit is within a first threshold range. The comparison circuit also determines whether the frequency-domain characteristic value output by the waveform conversion circuit is within a second threshold range. The output circuit is electrically connected to the comparison circuit. The output circuit outputs the determination result of the comparison circuit.

[0100] In one possible implementation, the oscilloscope and processor can be two separate devices, each with its own display. The oscilloscope is electrically connected to the output of the photodetector. The processor is electrically connected to both the oscilloscope and the electronic device. The oscilloscope receives the second electrical signal output from the photodetector, performs analog-to-digital conversion, noise reduction, and bandwidth limiting, and outputs a third electrical signal. A separate oscilloscope can display waveform information more intuitively, aiding in the analysis of signal parameters such as amplitude, frequency, and time. The processor receives the third electrical signal output from the oscilloscope, calculates the measured value of screen flicker based on this signal, determines whether the measured value of screen flicker is within specifications, and thus provides a conclusion on the screen flicker test of the electronic device.

[0101] In one possible implementation, the oscilloscope and processor can be integrated into a single processing device. The oscilloscope and processor are two modules within the device, transmitting signals via a system bus. This processing device can be a microcontroller, server, personal computer, or similar device.

[0102] Figure 16 This is a schematic diagram of the structure of a photodetector 02 provided in an embodiment of this application. The photodetector 02 can be applied in various spectral detection scenarios. This embodiment of the application uses the photodetector 02 in a screen detection device as an example for description. The photodetector 02 includes: a first circuit board 021, a second circuit board 022, a power supply interface 0211, a signal output interface 0221, and signal processing components (…). Figure 16 (Not shown in the image) and photoelectric sensor 023.

[0103] The first circuit board 021 and the second circuit board 022 are stacked and electrically connected. A power supply interface 0211 is located on and electrically connected to the first circuit board 021. This power supply interface is used to connect an external power source to power the photodetector; therefore, the first circuit board can optionally be called a power supply board. A signal output interface 0221 is located on and electrically connected to the second circuit board 022. This signal output interface is used to output the electrical signal collected and processed by the photodetector; therefore, the second circuit board can optionally be called a signal board. Signal processing components are located on the second circuit board 022 and electrically connected to the power supply interface 0211 via the second circuit board 022 and the first circuit board 021. A photodetector 023 is located on the second circuit board 022. The light-incident surface 0231 of the photodetector 02 serves as the light-incident side of the photodetector 02, and the light-incident surface 0231 is positioned away from the second circuit board 022. The signal processing components are connected between the photoelectric sensor 023 and the signal output interface 0221.

[0104] In that case, such as Figure 17 As shown, photoelectric sensor 023 is used to collect light signals from display screen 031 and convert the light signals into a first electrical signal. Signal processing components on the second circuit board 022 receive the first electrical signal output by photoelectric sensor 023, process the first electrical signal, and output a second electrical signal. Optionally, the signal processing components amplify, filter, and / or impedance match the first electrical signal. The second circuit board 022 outputs the second electrical signal to the processing device 06 of the screen detection device through a signal output interface. The first circuit board 021 is connected to an external power supply through a power supply interface to power the signal processing components on the second circuit board 022.

[0105] In one possible implementation, such as Figure 18 As shown, the first circuit board 021 includes a boost power supply module. The boost power supply module is electrically connected to the second circuit board 022. The boost power supply module can increase the voltage input to the second circuit board 022, thereby increasing the system's power density while maintaining the same power output, making the system smaller and lighter.

[0106] In one possible implementation, the boost power supply module uses thin-film devices, which is beneficial for the miniaturization design of the photodetector.

[0107] In some embodiments, such as Figure 16 As shown, the power supply interface 0221 is either a Type-C interface or a USB interface. This allows the photodetector 02 to use a universal interface for external power supply, improving the maintainability of the photodetector and making it more convenient for users.

[0108] In some embodiments, continue as follows Figure 16 As shown, the power supply interface 0211 is located on the side of the first circuit board 021 facing away from the second circuit board 022. The second circuit board 022 has a first surface 022A facing the first circuit board 021 and a second surface 022B facing away from the first circuit board 021. The signal output interface 0221 is located on the first surface 022A. A photoelectric sensor 023 and signal processing components (…) Figure 16 (Not shown in the diagram) is located on the second surface 022B. In this way, the functional structures of the second circuit board 022 and the first circuit board 021 are set on two surfaces that are opposite to each other, which makes it easier to stack the second circuit board 022 and the first circuit board 021, and thus facilitates the miniaturization design of the photodetector.

[0109] In one possible implementation, the signal processing components are thin-film devices, which is beneficial for the miniaturization design of the photodetector.

[0110] In some embodiments, such as Figure 19 As shown, the photodetector also includes a second connector 029. The first circuit board 021 and the second circuit board 022 have second connection holes 0291 that are positionally matched, and the second connector 029 passes through the second connection holes 0291 through the first circuit board 021 and the second circuit board 022.

[0111] In this way, the second connector can fix the first circuit board and the second circuit board, and assist in the stacking of the first circuit board and the second circuit board.

[0112] In some embodiments, such as Figure 20 As shown, the photodetector 02 also includes: a housing 024 and a cover 025. The housing 024 has a mounting groove. The cover 025 covers the opening of the mounting groove and together with the mounting groove, forms a receiving cavity 0241. First circuit board 021, second circuit board 022, signal processing components ( Figure 20 (Not shown) is located within the receiving cavity 0241. At least a portion of the power supply interface 0211 is located within the receiving cavity 0241. At least a portion of the signal output interface 0221 is located within the receiving cavity 0241. A portion of the photoelectric sensor 023 is located within the receiving cavity, and the light incident surface 0231 of the photoelectric sensor 023 is located outside the housing 024.

[0113] In this configuration, the housing and cover enclose the functional components of the photodetector, providing waterproof and moisture-proof protection against external environmental influences. Part of the power supply interface is located inside the housing cavity, while the other part penetrates the housing for connection to an external power source. Part of the signal output interface is also located inside the housing cavity, with the other part penetrating the housing for connection to the processing equipment of the screen detection device. Part of the photodetector is located inside the housing cavity, while the light-incident surface is located outside the housing for easier light signal acquisition.

[0114] It is understood that the power supply interface, signal output interface, and photoelectric sensor are exposed outside the receiving cavity through openings in the housing and cover. This application does not limit the location of the openings. The openings can be located on the housing, on the cover, or partly on the housing and partly on the cover.

[0115] For example, such as Figure 20 As shown, the housing 024 includes a first opening 0242, and the power supply interface 0211 is exposed in the first opening 0242, which can be connected to an external power source.

[0116] For example, such as Figure 20 As shown, the housing 024 and the cover 025 include a second opening 0243, and the signal output interface 0221 is exposed in the second opening 0243, which can be connected to the processing equipment of the screen detection device.

[0117] For example, such as Figure 20 As shown, the housing 024 includes a third opening 0244, and the light-incident surface 0231 of the photoelectric sensor 023 is exposed in the third opening 0244, which makes it easier to collect the light signal emitted by the display screen.

[0118] Understandably, the location of the first opening matches the location of the power supply interface. The location of the second opening matches the location of the signal output interface. The location of the third opening matches the location of the photoelectric sensor.

[0119] In some embodiments, such as Figure 21 As shown, an adjustment hole 0251 is provided on the cover 025. The photodetector 02 includes at least two signal processing components, namely a filter amplifier and an impedance matching device. Figure 18 As shown, the filter amplifier is electrically connected between the photoelectric sensor 023 and the impedance matching device. The impedance matching device is also electrically connected to the signal output interface. Continuing as... Figure 21 As shown, the screen detection device also includes an impedance adjustment knob 0223 for adjusting the impedance matching value of the impedance matching device. The impedance adjustment knob 0223 is disposed on the second circuit board 022 and is electrically connected to the impedance matching device. The impedance adjustment knob 0223 passes through the first circuit board 021 and is exposed in the adjustment hole 0251.

[0120] In this way, the impedance matching of the photodetector can be adjusted by using the impedance matching adjustment knob, making the photodetector compatible with various oscilloscope devices.

[0121] In one possible implementation, such as Figure 22As shown, the filtering and amplifying devices and impedance matching devices can achieve their functions through the circuit structure. The circuit input is the photoelectric sensor 023. The output voltage of the photoelectric sensor 023 can be adjusted through resistor R1 and the first operational amplifier A1, thereby realizing the filtering and amplification function. The load at the circuit output is the processing device 06. The processing device 06 includes an oscilloscope and a processor. The second operational amplifier A2 forms a voltage follower, which can realize the impedance matching function, allowing the photoelectric sensor to be adapted to various types of processing devices 06.

[0122] In one possible implementation, the filter amplifier and impedance matching device are integrated into a single signal processing component. The signal processing component is an integrated circuit chip. The second circuit board has a first surface facing the first circuit board and a second surface facing away from the first circuit board. The signal processing component is disposed on the second surface. An impedance adjustment knob is disposed on the first surface of the second circuit board, extending through the first circuit board and exposed in an adjustment hole.

[0123] In one possible implementation, both the filter amplifier and the impedance matching device are thin-film devices, which is beneficial for the miniaturization design of the photodetector.

[0124] In some embodiments, such as Figure 23 As shown, the cover 025 has a light-transmitting hole 0252. The photodetector also includes an LED 0212, which is mounted on the first circuit board 021 and electrically connected to the first circuit board 021 and the power supply interface 0211. A portion of the LED 0212 is exposed in the light-transmitting hole 0252. In this way, the photodetector can be judged by whether it is powered on normally.

[0125] In some embodiments, such as Figure 24 As shown, a portion of the signal output interface 0221 and at least a portion of the power supply interface 0211 are stacked on the side of the first circuit board 021 facing away from the second circuit board 022. The side of the signal output interface 0221 facing away from the second circuit board 022 has a first gap H1 between itself and the cover 025. The side of the power supply interface 0211 facing away from the second circuit board 022 has a second gap H2 between itself and the cover 025. The photodetector also includes at least one support post 027, which is located within the receiving cavity. One end of the support post 027 abuts against the second circuit board 022, and the other end of the support post 027 is connected to the cover 025. The height of the support post is H3. It is understood that after the photodetector is installed, H3 > H1, H3 > H2.

[0126] This application does not limit the number of support columns in its embodiments. For example, as shown... Figure 24 As shown, there are four support columns 027.

[0127] In some embodiments, such as Figure 25As shown, the photodetector 02 also includes a first connector 028. The cover 025, support post 027, second circuit board 022, and housing 024 have corresponding first connection holes 0281. The first connector 028 passes through the first connection hole 0281, through the cover 025, support post 027, and second circuit board 022, and connects to the housing 024. In this way, the photodetector can be fixedly installed using only one connection structure—the first connector. This facilitates the miniaturization design of the photodetector.

[0128] In one possible implementation, the first connector could be a screw. This screw passes through the cover, support column, and second circuit board, connecting to the housing and securing the entire photodetector.

[0129] In one possible implementation, the photodetector includes four first connectors. The four first connectors can more stably fix the photodetector in place.

[0130] In some embodiments, such as Figure 20 As shown, the photodetector 02 also includes a protective cover 026. The protective cover 026 covers the side of the photodetector 023 facing away from the housing 024. The protective cover 026 is connected to the housing 024. A second light-transmitting hole 0261 is provided on the protective cover 026, exposing the light-receiving surface 0231. In this way, the protective cover 026 can protect the light-receiving surface 0231 of the photodetector 023 located outside the housing 024.

[0131] In one possible implementation, continue as follows Figure 20 As shown, the height of the protective cover 026 is X1, and the height of the photoelectric sensor 023 is X2. Where X1 > X2. Optionally, X1 > X2, and the difference between X1 and X2 is 5 mm. In this way, the photoelectric sensor will not directly contact the display screen during light signal acquisition, thus preventing damage to both the photoelectric sensor and the display screen.

[0132] In one possible implementation, the protective cover is made of opaque plastic.

[0133] In one possible implementation, the protective cover is made of metal. During operation, a layer of plastic is wrapped around the outer part of the protective cover to prevent the metal cover from interfering with the display screen.

[0134] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0135] The following example illustrates a method for detecting screen flicker in electronic devices, using the structure of a screen detection device and a photoelectric sensor. The method for detecting screen flicker in electronic devices is as follows: Figure 26As shown, it includes S101 to S108.

[0136] S101. Send the electronic device under test into the cabinet fixture.

[0137] Specifically, such as Figure 11 As shown, the pull-out structure 012 is pulled out of the cabinet 01, causing the cabinet clamp 05 to also detach from the cabinet. After the electronic equipment is electrically connected to the processor, it is fixed in the cabinet clamp. The pull-out structure 012 is pushed into the cabinet 01, causing the cabinet clamp 05 and the electronic equipment to enter the detection chamber.

[0138] S102. Send the first instruction to the electronic device, and the electronic device switches to the specified screen.

[0139] Specifically, such as Figure 14 As shown, electronic device 03 and processor 062 are electrically connected. Electronic device 03 is stably positioned within the detection chamber of cabinet 01. Processor 062 sends a first command to electronic device 03. Electronic device 03 switches to the designated screen.

[0140] For example, the processor sends the first Android Debug Bridge (ADB) instruction to the electronic device, and the electronic device switches to the W255 screen.

[0141] S103. Send a second instruction to the electronic device, and the electronic device adjusts to the specified brightness.

[0142] Specifically, such as Figure 14 As shown, electronic device 03 and processor 062 are electrically connected. Electronic device 03 has been adjusted to a specified screen. Processor 062 sends a second command to electronic device 03. Electronic device 03 adjusts to a specified brightness.

[0143] For example, the processor sends a second ADB signal to the electronic device, and the electronic device adjusts to the specified brightness.

[0144] S104. Acquire the display screen brightness waveform for one second. Specifically, such as... Figure 17 and Figure 18 As shown, the photoelectric sensor 023 acquires the brightness waveform emitted by the display screen 031 for one second, converts the brightness waveform into a first electrical signal, and outputs the first electrical signal to the filtering and amplification module of the second circuit board 022. The filtering and amplification module of the second circuit board 022 filters and amplifies the first electrical signal and outputs it to the impedance matching module. The impedance matching module of the second circuit board 022 performs impedance matching processing on the first electrical signal and outputs it to the processing device 06 through the signal interface.

[0145] S105. Convert the brightness waveform from the time domain to the frequency domain.

[0146] Specifically, such as Figure 14As shown, the processing device includes an oscilloscope 061 and a processor 062, with the oscilloscope 061 electrically connected to the photodetector 02. The oscilloscope 061 can perform noise processing and bandwidth limiting on the second electrical signal output by the photodetector 02. Figure 15 As shown, processor 062 and oscilloscope 061 are electrically connected. Processor 062 includes waveform conversion circuitry. Processor 062 can convert the second electrical signal processed by oscilloscope 061 from an analog signal into a digital signal.

[0147] For example, waveform conversion circuits can use Fast Fourier Transform to convert analog signals into digital signals.

[0148] S106. Calculate the quantized flash characteristic value.

[0149] Specifically, such as Figure 15 As shown, processor 062 includes a computing circuit. The computing circuit can use the digital signal output by the waveform conversion circuit to calculate the quantized flicker characteristic value of the electronic device screen.

[0150] For example, quantized flicker characteristics can be frequency domain characteristics and / or SVM values. Frequency domain characteristics can characterize the flicker frequency of the screen. SVM values ​​can characterize the human eye stimulation index.

[0151] S107. Determine whether the quantization splash screen feature values ​​meet the specifications.

[0152] Specifically, such as Figure 15 As shown, processor 062 includes a comparison circuit. The comparison circuit can use the quantized flicker characteristic value of the electronic device screen output by the calculation circuit to determine whether the quantized flicker characteristic value meets the specification requirements.

[0153] S108, Upload screen flicker test results.

[0154] Specifically, such as Figure 15 As shown, processor 062 includes an output circuit. The output circuit can be used to configure a communication protocol and upload the judgment result output by the comparison circuit to the production line system. For example, the screen detection device communicates with the production line system via a network. The output circuit configures a Wireless Local Area Network (WLAN) protocol.

[0155] For example, the screen inspection device communicates with the production line system via a Universal Serial Bus (USB) interface. The output circuitry is configured with the USB protocol.

[0156] It is understandable that the oscilloscope and processor in S105 to S108 can be separate devices or circuit structures. When the oscilloscope and processor are implemented as circuit structures, they can be integrated into either the processing device used to send the first and second instructions or into the photoelectric sensor. In this case, Figure 26 The entities performing the intermediate steps may change, but all remain within the scope of protection of the embodiments in this application.

[0157] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A screen detection apparatus, characterized by comprising: The screen detection device is used for detecting a display screen of an electronic device, and comprises: a cabinet, wherein a detection cavity is arranged in the cabinet, and the detection cavity is used for accommodating the electronic device; a photoelectric detector arranged in the detection cavity and connected with the cabinet; an incident light side of the photoelectric detector faces the display screen; the photoelectric detector is used for collecting screen brightness of the display screen and performing photoelectric conversion; the photoelectric detector comprises: a first circuit board; a power supply interface arranged on the first circuit board and electrically connected with the first circuit board; a second circuit board arranged in a stacked manner with the first circuit board and electrically connected with the first circuit board; a signal output interface arranged on the second circuit board and electrically connected with the second circuit board; a signal processing component arranged on the second circuit board and electrically connected with the power supply interface through the second circuit board and the first circuit board; a photoelectric sensor arranged on the second circuit board, wherein an incident light surface of the photoelectric sensor serves as the incident light side of the photoelectric detector, and the incident light surface is arranged away from the second circuit board; and the signal processing component is connected between the photoelectric sensor and the signal output interface.

2. The screen detection apparatus according to claim 1, characterized by The screen detection device further comprises: a probe support arranged in the detection cavity and connected with the cabinet; a mounting hole is arranged on the probe support; a part of the photoelectric detector penetrates through the mounting hole, and the photoelectric detector is connected with the probe support.

3. The screen detection apparatus according to claim 2, characterized by The probe support comprises: a support plate, wherein the mounting hole is arranged on the support plate; and the support plate is connected with the cabinet and the photoelectric detector; a light shielding plate located on a side of the support plate and connected with the support plate; and the light shielding plate extends along a side where the incident light side of the photoelectric detector is located.

4. The screen detection device according to claim 3, wherein a plate surface of the support plate is rectangular; five mounting holes are arranged on the probe support, which are four first mounting holes and one second mounting hole; vertical projections of the four first mounting holes on the plate surface of the support plate are located at four corners of the rectangle respectively; and the four first mounting holes are arranged around a periphery of the second mounting hole.

5. The screen detection apparatus according to any one of claims 2 to 4, characterized by The screen detection device further comprises: a cabinet clamp arranged in the detection cavity and located on the incident light side of the photoelectric detector; a recess for accommodating the electronic device is arranged on the cabinet clamp; and the cabinet clamp is used for being connected with the electronic device.

6. The screen detection device according to claim 5, wherein a slide channel is arranged on the cabinet and communicates with the detection cavity; and the slide channel is located on the incident light side of the photoelectric detector; The screen detection device further comprises: a pulling structure, a part of which extends into the slide channel and is connected with the cabinet in a sliding or rolling manner; and the cabinet clamp is arranged on the part of the pulling structure located in the slide channel.

7. The screen detection apparatus according to claim 6, characterized by The screen detection device comprises at least two photoelectric detectors and at least two cabinet clamps; a vertical projection of one of the photoelectric detectors on a portion of the pull-out structure located in the slide is located within a vertical projection of a groove of one of the cabinet clamps on the portion of the pull-out structure located in the slide.

8. The screen detection device according to claim 6, wherein, The probe support comprises a support plate, and the mounting hole is formed in the support plate; a vertical projection of the support plate on a portion of the pull-out structure located in the slide completely covers a vertical projection of the groove on the portion of the pull-out structure located in the slide.

9. The screen detection apparatus according to any one of claims 1 to 4, characterized by The screen detection device further comprises: An oscilloscope is arranged in the cabinet and is electrically connected to the output end of the photoelectric detector; A processor is arranged in the cabinet, and the processor is electrically connected to the oscilloscope and the electronic device.

10. The screen detection device according to any one of claims 1-4, wherein, The power supply interface is arranged on a side of the first circuit board away from the second circuit board; The second circuit board has a first surface facing the first circuit board and a second surface away from the first circuit board; the signal output interface is located on the first surface; and the photoelectric sensor and the signal processing component are located on the second surface.

11. The screen detection apparatus according to any one of claims 1 to 4, characterized by The photoelectric detector further comprises: A housing having a mounting groove; A cover arranged at an opening of the mounting groove and surrounding the mounting groove to form a receiving cavity; The first circuit board, the second circuit board, the signal processing component, at least a portion of the power supply interface, at least a portion of the signal output interface, and a portion of the photoelectric sensor are located in the receiving cavity, and an incident light surface of the photoelectric sensor is located outside the housing.

12. The screen detection apparatus according to claim 11, characterized by An adjusting hole is formed in the cover; The photoelectric detector comprises at least two signal processing components, which are a filter amplifier and an impedance matching component respectively; the filter amplifier is electrically connected between the photoelectric sensor and the impedance matching component; and the impedance matching component is also electrically connected to the signal output interface. The screen detection device further comprises an impedance adjusting knob arranged on the second circuit board and electrically connected to the impedance matching component, the impedance adjusting knob being used to adjust an impedance matching value of the impedance matching component; and the impedance adjusting knob penetrates through the first circuit board and is exposed in the adjusting hole.

13. The screen detection apparatus according to claim 11, characterized by A first light transmission hole is formed in the cover; The photoelectric detector further comprises a lamp bead arranged on the first circuit board and electrically connected to the first circuit board and the power supply interface; and a portion of the lamp bead is exposed in the first light transmission hole.

14. The screen detection device according to claim 11, wherein, Part of the signal output interface and at least part of the power supply interface are arranged in a stacked manner on a side of the first circuit board away from the second circuit board; a side of the signal output interface away from the second circuit board has a first spacing with the cover, and a length of the first spacing is H1; a side of the power supply interface away from the second circuit board has a second spacing with the cover, and a length of the second spacing is H2; The photoelectric detector further comprises at least one support column located in the accommodating cavity; one end of the support column is in abutment with the second circuit board, and the other end of the support column is connected with the cover; a height of the support column is H3; Wherein, H3>H1; H3>H2.

15. The screen detection apparatus of claim 14, wherein, The power supply interface is a type-C interface or a USB interface.

16. The screen detection apparatus of claim 15, wherein, The photoelectric detector further comprises: A first connecting member penetrating through the cover, the support column, the second circuit board, and connected with the shell.

17. The screen detection apparatus of claim 15, wherein, The photoelectric detector further comprises: A second connecting member penetrating through the first circuit board and the second circuit board.

18. The screen detection apparatus of claim 11, wherein, The photoelectric detector further comprises: A protective cover covering a side of the photoelectric sensor away from the shell, and the protective cover is connected with the shell; a second light-transmitting hole is formed in the protective cover, and the second light-transmitting hole exposes the light-incident surface.

19. A photodetector, comprising: The photoelectric detector comprises: A first circuit board; A power supply interface arranged on the first circuit board and electrically connected with the first circuit board; A second circuit board arranged in a stacked manner with the first circuit board and electrically connected with the first circuit board; A signal output interface arranged on the second circuit board and electrically connected with the second circuit board; A signal processing component arranged on the second circuit board and electrically connected with the power supply interface through the second circuit board and the first circuit board; A photoelectric sensor arranged on the second circuit board, a light-incident surface of the photoelectric sensor serving as a light-incident side of the photoelectric detector, the light-incident surface being arranged away from the second circuit board; the signal processing component is connected between the photoelectric sensor and the signal output interface.

20. The photoelectric detector according to claim 19, wherein The power supply interface is arranged on a side of the first circuit board away from the second circuit board; The second circuit board has a first surface facing the first circuit board and a second surface away from the first circuit board; the signal output interface and the signal processing component are located on the first surface; and the photoelectric sensor is located on the second surface.

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