Screen detection device

Abstract

The invention relates to the technical field of detection, and discloses a detection device. The detection device comprises a driving device, a camera and a computing device, the driving equipment is used for driving at least one of the camera and the to-be-detected display screen to move, so that the camera shoots different sub-display areas in a display area of the to-be-detected display screen; the optical axis direction of the camera is made to be matched with the main light ray direction of the light-emitting unit in the first sub-display area currently shot by the camera; the camera is used for collecting a detection image of the first sub-display area under the condition that the optical axis direction of the camera is matched with the main light ray direction of the light emitting unit in the first sub-display area; the computing device is used for determining that the non-uniform defect exists in the first sub-display area of the display screen and the area corresponding to the image area under the condition that the image area meeting the first condition exists in the detection image. Therefore, the accuracy of detecting the non-uniform defects of the display screens with different main light directions can be improved.

Description

Technical Field

[0001] The present application relates to the field of detection technology, and in particular to a screen detection device. Background Art

[0002] Mura defect refers to the defect of uneven brightness of the light-emitting unit in the display screen. When there is a mura defect in the display screen, the image displayed in the area (hereinafter referred to as the mura area) is different from the real image because the brightness of the light is uneven in the area where the mura defect is located. Therefore, when the display screen leaves the factory or is installed in an electronic device, it is necessary to perform mura defect detection to correct the mura area of ​​the display screen.

[0003] At present, it is generally done manually by human eyes to observe whether there is unevenness defect on the display screen. However, different people's eyes have different sensitivities to brightness, and the accuracy of manual observation of whether there is unevenness defect on the display screen is usually low. Summary of the invention

[0004] In view of this, the present application provides a screen detection device, which only captures a detection image of a part of the screen area at a time when detecting the screen, and the optical axis direction of the camera matches the main light direction of the light-emitting unit of the captured area when capturing the detection image. In this way, the uneven brightness of the detection image caused by the different main light directions of the light-emitting units of the screen can be avoided, which is conducive to improving the accuracy of uneven defect detection for screens with different main light directions of the light-emitting units.

[0005] The present application provides a screen detection device, which includes: a driving device, a camera and a computer device; wherein the driving device includes a first connecting member, the first connecting member is used to fix the camera or the screen; and corresponding to the first connecting member being in a first position, the shooting range of the camera is a first sub-display area of ​​the screen, and the optical axis direction of the camera matches the main light direction of the light-emitting unit in the first sub-display area; corresponding to the first connecting member being in a second position, the shooting range of the camera is a second sub-display area of ​​the screen, and the optical axis direction of the camera matches the main light direction of the light-emitting unit in the second sub-display area; the computing device is used to determine that there is an uneven defect in the area corresponding to the first image area in the screen when there is a first image area that meets the first condition in the first detection image collected by the camera when the first connecting member is in the first position.

[0006] Optionally, the driving device is used to drive the first connecting member to move.

[0007] In the device, the driving device can drive the camera or the screen to be detected to operate by driving the first connecting member to move (linear motion and / or rotational motion), so that when the first connecting member is in the first position, the camera captures the first sub-display area of ​​the screen (a part of the display area of ​​the screen), and the optical axis direction of the camera matches the main light direction of the light-emitting unit in the first sub-display area, and when the first connecting member is in the second position, the camera captures the second sub-display area of ​​the screen (a part of the display area of ​​the screen), and the optical axis direction of the camera matches the main light direction of the light-emitting unit in the second sub-display area. In the case where there is a first image area that meets the first condition in the first detection image of the camera, the computer device can determine that there is an uneven defect in the area corresponding to the first image area in the screen. Since the first detection image is collected when the first connecting member is in the first position, and the optical axis direction of the camera matches the main light direction of the light-emitting unit in the first sub-display area, it can avoid uneven brightness in the detection image corresponding to the first sub-display area captured by the camera due to different main light directions of the light-emitting unit of the screen, which is conducive to improving the accuracy of uneven defect detection on the screen.

[0008] Optionally, the first image region may be an image region with uneven brightness hereinafter.

[0009] Alternatively, the first condition may be the non-uniform condition described below.

[0010] In a possible implementation of the first aspect above, the computing device is also used to determine that there is an uneven defect in an area of ​​the screen corresponding to the second image area when there is a second image area satisfying the first condition in a second detection image captured by the camera when the first connecting member is in the second position.

[0011] Since the second detection image is collected when the first connecting member is in the second position, and the optical axis direction of the camera matches the main light direction of the light-emitting unit in the second sub-display area, it can avoid uneven brightness in the detection image corresponding to the second sub-display area taken by the camera due to the different main light directions of the light-emitting units of the screen, which is beneficial to improving the accuracy of uneven defect detection on the screen.

[0012] In a possible implementation of the first aspect above, the brightness of the above-mentioned first image area is different from the brightness of other areas outside the first image area in the first detection image; and the first condition includes at least one of the following conditions: the contrast between the brightness of the first image area and the brightness of other image areas except the first image area in the first detection image is greater than a first value; the size of the first image area is greater than a second value; the quality factor of the first image area is greater than a third value, wherein the quality factor is used to indicate the sensitivity of the human eye to the domain of the first image area.

[0013] In a possible implementation of the first aspect above, the quality factor of the above-mentioned first image area is determined based on the resolution of the first sub-display area, the resolution of the camera, the size of the first image area, the angular resolution of the area in the first sub-display area corresponding to the first image area, and the contrast between the brightness of the first image area and the brightness of other image areas in the detection image except the first image area.

[0014] In a possible implementation of the first aspect, the quality factor is determined by the following formula:

[0015]

[0016] Among them, C is the contrast between the brightness of the first image area and the brightness of other image areas except the first image area in the first detection image; ɑ×b is the resolution of the camera, c×d is the resolution of the first image area, S is the size of the first image area, PDDX is the angular resolution of the area corresponding to the first image area in the screen in the first direction, PDDY is the angular resolution of the area corresponding to the first image area in the screen in the second direction, e1 and e2 are empirical values ​​or experimental values, the first direction and the second direction are perpendicular, and the planes where the first direction and the second direction are located are parallel to the plane where the display area of ​​the screen is located.

[0017] In a possible implementation of the first aspect, e1=0.711, e2=0.72.

[0018] In a possible implementation of the first aspect above, the above-mentioned device includes a first reference direction and a second reference direction that are perpendicular to each other, and the plane where the first reference direction and the second reference direction are located is parallel to the display area of ​​the screen, and the camera is fixed to the first connecting member; and the driving device is used to drive the first connecting member to move in at least one of the following ways: moving along the first reference direction, moving along the second reference direction, rotating around the first reference direction, and rotating around the second reference direction, so that the first connecting member is located at the first position or the second position.

[0019] Optionally, the first reference direction may be the X direction hereinafter, and the second reference direction may be the Y direction hereinafter. In other words, the driving device may be a driving device capable of driving the first connecting member (i.e., driving the camera) to move along the X direction, move along the Y direction, rotate around the X direction, and rotate around the Y direction.

[0020] In a possible implementation of the first aspect above, the driving device also includes a second connecting member, and the screen is fixed to the second connecting member; and when the first connecting member is in the first position, the second connecting member is in the third position, and when the first connecting member is in the second position, the second connecting member is in the fourth position.

[0021] In a possible implementation of the first aspect above, the driving device is also used to drive the second connecting member to move in at least one of the following ways: moving along the first reference direction, moving along the second reference direction, rotating around the first reference direction, and rotating around the second reference direction, so that the second connecting member is located in the third position or the fourth position.

[0022] That is to say, the driving device can also drive the second connecting member (ie, the driving screen) to move along the X direction, move along the Y direction, rotate around the X direction, and rotate around the Y direction.

[0023] Optionally, the driving device may be a driving device capable of driving the first connecting member to move along the X direction and the Y direction, and driving the second connecting member to rotate around the X direction and the Y direction.

[0024] Optionally, the driving device may be a driving device capable of driving the second connecting member to move along the X direction and the Y direction, and driving the first connecting member to rotate around the X direction and the Y direction.

[0025] In a possible implementation of the first aspect above, the above-mentioned apparatus includes a first reference direction and a second reference direction that are perpendicular to each other, and the planes where the first reference direction and the second reference direction are located are parallel to the display area of ​​the screen, and the screen is fixed to the first connecting member; and the driving device is used to drive the first connecting member to move in at least one of the following ways: moving along the first reference direction, moving along the second reference direction, rotating around the first reference direction, and rotating around the second reference direction, so that the first connecting member is located in the first position or the second position.

[0026] Optionally, the first reference direction may be the X direction hereinafter, and the second reference direction may be the Y direction hereinafter. That is to say, the driving device may be a driving device capable of driving the first connecting member (i.e., driving the screen) to move along the X direction, move along the Y direction, rotate around the X direction, and rotate around the Y direction.

[0027] In a possible implementation of the first aspect above, the above-mentioned driving device also includes a third connecting member, and the camera is fixed to the third connecting member; and when the first connecting member is in the first position, the third connecting member is in the fifth position, and when the first connecting member is in the second position, the second connecting member is in the sixth position.

[0028] In a possible implementation of the first aspect above, the driving device is also used to drive the third connecting member to move in at least one of the following ways: moving along the first reference direction, moving along the second reference direction, rotating around the first reference direction, and rotating around the second reference direction, so that the third connecting member is located in the fifth position or the sixth position.

[0029] That is to say, the driving device can also drive the third connecting member (ie, drive the camera) to move along the X direction, move along the Y direction, rotate around the X direction, and rotate around the Y direction.

[0030] Optionally, the driving device may be a driving device capable of driving the first connecting member to move along the X direction and the Y direction, and driving the third connecting member to rotate around the X direction and the Y direction.

[0031] Optionally, the driving device may be a driving device capable of driving the third connecting member to move along the X direction and the Y direction, and driving the first connecting member to rotate around the X direction and the Y direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 According to some embodiments of the present application, a schematic diagram of a scenario for detecting uneven defects is shown;

[0033] Figure 2 According to some embodiments of the present application, a schematic diagram of a scene for detecting uneven defects of a display screen 30 is shown;

[0034] Figure 3 According to some embodiments of the present application, a schematic structural diagram of a detection device 200 is shown;

[0035] Figure 4A According to some embodiments of the present application, a schematic diagram of a process for detecting uneven defects of a display screen 30 is shown;

[0036] Figure 4B According to some embodiments of the present application, a schematic diagram of detecting an image P3D is shown;

[0037] Figure 5 According to some embodiments of the present application, a schematic diagram of the positional relationship between an optical lens / lens group, a human eye, and a display screen is shown;

[0038] Figure 6According to some embodiments of the present application, a schematic diagram of a detection device 200 detecting uneven defects of a display screen 30 is shown;

[0039] Figure 7 According to some embodiments of the present application, a schematic diagram of another detection device 200 detecting uneven defects of a display screen 30 is shown;

[0040] Figure 8 According to some embodiments of the present application, a schematic diagram of another detection device 200 detecting uneven defects of a display screen 30 is shown;

[0041] Fig. 9 According to some embodiments of the present application, a schematic diagram of another detection device 200 detecting uneven defects of a display screen 30 is shown;

[0042] Fig.10 According to some embodiments of the present application, a schematic flow chart of a detection method is shown;

[0043] Fig.11 According to some embodiments of the present application, a schematic diagram of the structure of a computing device 201 is shown. DETAILED DESCRIPTION

[0044] Illustrative embodiments of the present application include, but are not limited to, screen (display screen) detection devices.

[0045] The technical solution of the present application is introduced below in conjunction with the accompanying drawings.

[0046] It should be understood that when a display screen (also referred to as a screen) displays an image with uniform brightness (such as a pure color image), if the display screen has no uneven defects, the light emitting brightness of each light emitting unit of the display screen is the same.

[0047] Based on this, in order to solve the problem of low accuracy in manually observing whether there is an uneven defect on the display screen, in some embodiments, the computing device can control the display screen to display an image with uniform brightness (such as a solid color image). Then, the computing device can use a camera with a resolution greater than the resolution of the display screen to shoot the display area of ​​the entire display screen perpendicularly to the display screen to obtain a detection image. Secondly, the computing device can determine whether there is an uneven defect on the display screen based on the detection image, for example, when there is an image area with uneven brightness in the detection image, it is determined that there is an uneven defect on the display screen.

[0048] It should be understood that an image area with uneven brightness (also called a Mura area) may be an image area in the detection image having a brightness different from that of other image areas, or an image area in which the degree of difference between the brightness in the detection image and the brightness in other image areas is greater than a preset degree of difference.

[0049] For example, Figure 1 According to some embodiments of the present application, a schematic diagram of a scenario for detecting uneven defects is shown.

[0050] like Figure 1 As shown, the display plane of the display screen 20 is the XY plane, and the main light direction of the light emitted by each light-emitting unit of the display screen 20 is the Z direction perpendicular to the XY plane. The computing device 00 can drive the display screen 20 to display an image with uniform brightness (for example, a pure color image), and control the camera 10 to shoot the entire display area of ​​the display screen 20 along the Z direction and obtain a detection image P1. Then, the computing device 00 can use an algorithm for uneven defect detection (for example, a Fourier transform method, a contrast enhancement method, a brightness difference between the pixels of the detection image P1 and the surrounding pixels, a brightness gradient calculation, a color difference calculation, etc.) to process the detection image P1 to determine whether there is an image area with uneven brightness in the detection image P1. If there is an image area with uneven brightness in the detection image P1, the computing device 00 can determine that the display screen 20 has an uneven defect.

[0051] Through the above method, the computing device 00 can determine whether the display screen 20 has uneven defects by using the camera 10 to shoot the entire display area of ​​the display screen 20. However, the above method is only applicable to display screens with the same main light direction of the light-emitting units, and is not applicable to display screens with different (partially different or completely different) main light directions of the light-emitting units (for example, display screens used for virtual reality (VR) and augmented reality (AR) devices, such as photodiode (light-emitting diode, LED) display screens, organic photodiode (organic light-emitting diode, OLED) display screens, etc.).

[0052] For example, refer to Figure 2 , the main light directions of the light-emitting units (such as LED, OLED, micro LED, micro OLED, etc.) of the display screen 30 are different, and the main light direction of the light-emitting unit farther from the center of the display screen 30 deviates more from the Z-axis direction. Figure 1When the detection image P2 of the display screen 30 is collected in the manner shown when the display screen 30 displays an image with uniform brightness (such as a pure color image), due to the different main light directions of the light-emitting units of the display screen 30, even if the light-emitting brightness of each light-emitting unit is the same, the light emitted by each light-emitting unit acts on the image sensor (such as a charge-coupled device (CCD) sensor, a complementary metal-oxide-semiconductor (CMOS) sensor, etc.) in the camera 30. The light-emitting brightness is also different, which will cause the brightness in the detection image P2 to be uneven (for example, the brightness of each pixel in the detection image P2 decays as the distance between the pixel and the center of the detection image P2 increases). In this way, due to the uneven brightness in the detection image P2, even if the display screen 30 does not have an uneven defect, the computing device 00 will determine that the display screen 30 has an uneven defect based on the detection image P2, resulting in a false detection.

[0053] In order to improve the accuracy of uneven defect detection on a display screen, an embodiment of the present application provides an uneven defect detection device for detecting a display screen, which does not capture detection images of the entire display area of ​​the display screen to be detected at one time, but captures detection images of sub-display areas in the display area of ​​the display screen to be detected respectively, and when capturing a detection image of a sub-display area, the direction of the optical axis of the camera matches the direction of the main light of the light-emitting unit in the sub-display area. Then, the detection device can determine whether there is an uneven defect on the display screen to be detected based on the detection images corresponding to each sub-display area.

[0054] It should be understood that, in some embodiments, the direction of the main light of each light-emitting unit in the display screen is a known parameter in the design, manufacture or production process of the display screen.

[0055] Specifically, Figure 3 According to some embodiments of the present application, a schematic structural diagram of a detection device 200 is shown.

[0056] like Figure 3 As shown, the detection device 200 may include a computing device 201, a driving device 202 and a camera 203. Among them:

[0057] The driving device 202 can drive at least one of the camera 203 and the display screen to be detected to move, so that the camera 203 can capture different sub-display areas in the display area of ​​the display screen, and the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area captured by the camera 203 (for example, the optical axis direction of the camera 203 is the same as the main light direction of the light-emitting unit in the center of the captured sub-display area, the optical axis direction of the camera 203 is the same as the average direction of the main light direction of the light-emitting unit in the captured sub-display area, etc.). In other words, at least one of the camera 203 and the display screen to be detected can be fixed on a connecting member (a member for connecting a carrier) of the driving device 202, so that the driving device 202 can drive the camera 203 and / or the display screen to be detected to be in different positions when driving the connecting member to move to different positions.

[0058] When it is necessary to detect uneven defects of the display screen, the computing device 201 can control the display screen to display an image with uniform brightness (for example, displaying a pure color image), and control the driving device 202 and the camera 203 to collect multiple detection images of different sub-display areas of the display screen, wherein when the camera 203 captures the detection image of any sub-display area, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area captured by the camera 203. Then, the computing device 201 can determine whether there is an uneven defect in the corresponding sub-display area based on each detection image. For example, when there is an image area with uneven brightness in a certain detection image and the image area with uneven brightness meets the uneven condition, the computing device 201 can determine that there is an uneven defect in the area corresponding to the image area with uneven brightness in the display screen.

[0059] Based on the above method, when collecting the detection image of the sub-display area of ​​the display screen, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area of ​​the display screen, and the change in the main light direction of the light-emitting unit in a sub-display area is usually small, the change in the main light direction has a negligible effect on the brightness in the detection image, which can avoid the appearance of image areas with uneven brightness in the detection image due to the different main light directions of the light-emitting units of the display screen, which is conducive to improving the accuracy of the detection result. In addition, since the camera 203 only collects one sub-display area of ​​the display screen at a time, the camera 203 can use a camera with a lower resolution, instead of a camera with a resolution greater than the resolution of the display screen, which is conducive to saving costs.

[0060] For example, assuming that the resolution of the camera 203 is greater than 1 / 4 (e.g., 2048×1080) of the resolution of the display screen 30 (e.g., 4096×2160), the computing device 201 can collect the detection image corresponding to the sub-display area of ​​the display screen 30 four times, and detect whether there are uneven defects in the display screen 30 based on the collected display images.

[0061] refer to Figure 4A , the computing device 201 can move and rotate the camera 203 through the driving device 202, and respectively collect the detection image P3A corresponding to the sub-display area D1 of the display screen 30, the detection image P3B corresponding to the sub-display area D2, the detection image P3C corresponding to the sub-display area D3, and the detection image P3D of the sub-display area D4 through the camera 203. Among them, when the camera 203 collects the detection image P3A, the detection image P3B, the detection image P3C and the detection image P3D, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area D1, the sub-display area D2, the sub-display area D3, and the sub-display area D4. Then, the computing device 201 can determine whether the display screen 30 has an uneven defect when at least one of the detection images P3A, the detection image P3B, the detection image P3C and the detection image P3D has an image area with uneven brightness and the image area with uneven brightness meets the uneven condition.

[0062] In some embodiments, when the computing device 201 needs to collect a detection image of a sub-display area in the display screen, it can first determine the reference direction corresponding to the sub-display area based on the main light direction of the light-emitting unit in the sub-display area (for example, the main light direction of the light-emitting unit in the center of the sub-display area, the average direction of the main light direction of the light-emitting unit in the sub-display area, the average direction of the main light direction of multiple light-emitting units in the central area of ​​the sub-display area, etc.). Then, the computing device 201 can move and rotate the camera 203 and / or the display screen by driving the device 202, so that the camera 203 can capture the sub-display area, and the optical axis direction of the camera 203 is parallel to the reference direction (that is, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area). Secondly, the computing device 201 can control the camera 203 (for example, send a shooting instruction to the camera 203) to collect the detection image of the sub-display area.

[0063] In some embodiments, an image region with uneven brightness (also referred to as a Mura region) may be an image region in the detection image whose brightness is different from that of other image regions, or an image region in which the degree of difference between the brightness in the detection image and the brightness in other image regions is greater than a preset degree of difference. The granularity of the uneven brightness region may be one pixel, that is, the uneven brightness region may include at least one pixel. In some embodiments, the computing device 201 may determine the image region with uneven brightness in the detection image by an algorithm for determining a Mura region (e.g., a Fourier transform method, a contrast enhancement method, a brightness difference between each pixel in the detection image and the surrounding pixels, a brightness gradient calculation, a color difference calculation, etc.).

[0064] In some embodiments, the non-uniform condition may be set based on different detection requirements. Exemplarily, the non-uniform condition may include at least one of the following conditions:

[0065] The contrast between the brightness of the image area with uneven brightness and the brightness of other image areas in the detection image except the image area with uneven brightness is greater than a first value;

[0066] The size of the image area with uneven brightness is greater than the second value;

[0067] The quality factor Q of the image area with uneven brightness is greater than the preset quality factor Q0; wherein the quality factor Q is used to indicate the sensitivity of the human eye to the image area with uneven brightness, and the larger the quality factor Q is, the easier it is for the human eye to distinguish the difference between the content displayed in the area corresponding to the image area with uneven brightness in the display screen and the actual content (the content input into the display screen).

[0068] In some embodiments, the quality factor Q of the image area with uneven brightness can be determined based on the size of the image area with uneven brightness, the contrast between the brightness of the image area with uneven brightness and the brightness of other image areas in the detection image except the image area with uneven brightness, the angular resolution (pixels per degree, PPD) of the area corresponding to the image area with uneven brightness in the display screen, the resolution of the sub-display area, and the resolution of the camera.

[0069] In some embodiments, the quality factor Q of the image area with uneven brightness can be determined by the following formula (1):

[0070]

[0071] In formula (1), C is the contrast between the brightness of the image area with uneven brightness and the brightness of other image areas in the detection image except the image area with uneven brightness; ɑ×b is the resolution of the camera, c×d is the resolution of the sub-display area, S is the size of the image area with uneven brightness (for example, the number of pixels in the image area with uneven brightness), PDDX is the angular resolution (pixels per degree, PPD) of the area corresponding to the image area with uneven brightness in the display screen in the first direction (for example, the X direction) (for example, the number of pixels filled within an average 1° angle in the field of view), and PDDY is the angular resolution of the area corresponding to the image area with uneven brightness in the display screen in the second direction (for example, the Y direction); e1 and e2 are empirical values ​​or experimental values, wherein the first direction and the second direction are perpendicular, and the planes where the first direction and the second direction are located are parallel to the plane where the display area of ​​the display screen is located.

[0072] In some embodiments, the contrast ratio between the brightness of the image region with uneven brightness and the brightness of other image regions in the detection image except the image region with uneven brightness may be: the absolute value of the difference between the brightness of the image region with uneven brightness and the brightness of the region outside the image region with uneven brightness in the detection image, divided by the quotient of the brightness of the region outside the image region with uneven brightness in the detection image. Figure 4B , for the aforementioned detection image P3D, the brightness of the image region S1 is higher than that of other image regions (hereinafter referred to as image region S2) in the detection image P3D, and the image region S1 may be an image region with uneven brightness. If the brightness in the image region S1 is m (e.g., the average brightness value, weighted average brightness value, etc. of each pixel in the image region S1), and the brightness in the image region S2 is n (e.g., the average brightness value, weighted average brightness value, etc. of each pixel in the image region S2), the C value corresponding to the image region S1 may be |mn| / n, where |mn| represents the absolute value of mn.

[0073] In some embodiments, e1=0.711, e2=0.72.

[0074] In some embodiments, the preset value Q0 can be set according to the strictness of the display screen detection, as well as e1 and e2. The larger the preset value Q0 is, the higher the strictness of the display screen detection is.

[0075] In some embodiments, reference Figure 5When the display screen is installed in an AR device or a VR device, an optical lens or lens group (such as a pancake lens (a type of optical lens) or a lens group, etc.) is usually set between the display screen and the human eye to meet the requirements of the AR device or VR for light modulation (such as the angle of incidence to the human eye, the scale of the image, the length of the light path, etc.). When designing an optical lens or a lens group, the angular resolution of the optical lens corresponding to different sub-display areas of the display screen is usually determined first. Based on this, the computing device 201 can obtain the angular resolution of different display areas of the display screen from the design parameters of the optical lens or the lens group (for example, derived from the application for designing the optical lens). Based on this, the PPD in the above formula (1) takes into account the angular resolution of different display areas of the display screen, which is conducive to improving the accuracy of uneven defect detection.

[0076] It should be understood that Figure 5 The pancake lens group shown is only an example. In other embodiments, the pancake lens group may include more or fewer optical lenses, or multiple optical lenses may be glued or combined into one optical lens, which is not limited here.

[0077] It should be understood that in other embodiments, the non-uniform condition may also include other conditions, which are not limited here.

[0078] In some embodiments, the main light direction of the light emitting unit may be the direction in which the light emitting brightness of the light emitting unit is the highest, that is, the direction corresponding to the main light angle / chief ray angle (CRA) of the light emitting unit.

[0079] In some embodiments, the resolution of the camera 203 is greater than the resolution of the sub-display area.

[0080] In some embodiments, the resolution of the camera 203 is greater than twice the resolution of the sub-display area. In this way, it is possible to avoid abnormalities in the captured detection image (e.g., uneven brightness) caused by the misalignment of the pixels of the camera 203 and the pixels of the sub-display area, which is conducive to improving the accuracy of the computing device 201 in detecting uneven defects of the display screen.

[0081] In some embodiments, the computing device 201 may determine the size of the sub-display area to be photographed at one time according to different display screens, so that the degree of difference in the main light direction of the light-emitting units in each sub-display area meets a preset condition, thereby avoiding uneven brightness of the detection image collected by the camera 203 due to large differences in the main light directions of the light-emitting units in the sub-display areas. For example, the maximum value of the angle between the main light directions of each light-emitting unit in the sub-display area may be less than the preset angle.

[0082] In some embodiments, the computing device 201 may adjust the size of the sub-display area captured by the camera 203 by adjusting the optical zoom factor of the camera 203 , so that the resolution of the sub-display area is smaller than the resolution of the camera 203 .

[0083] For ease of description, the following takes the display screen to be detected as the display screen 30, the plane where the display area of ​​the display screen 30 is located as the XY plane, and the direction perpendicular to the XY plane as the Z direction as an example to introduce the technical solution of the present application.

[0084] Exemplarily, in some embodiments, the driving device 202 can capture detection images of different sub-display areas of the display screen 30 by driving the camera 203 to move and / or rotate, and ensure that when the camera 203 captures the detection image corresponding to any sub-display area, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area captured by the camera 203 in the display screen 30.

[0085] In some embodiments, the driving device 202 may be any device capable of driving the connecting member of the driving device 202 to move in the X direction (X positive direction and X negative direction), move in the Y direction (Y positive direction and Y negative direction), rotate around the X direction (clockwise and counterclockwise), and rotate around the Y direction (clockwise and counterclockwise). The connecting member of the driving device 202 may be one or two.

[0086] When the driving device 202 has only one connector, the connector can be used to fix the display screen so that the display screen follows the connector to move along the X direction (X positive direction and X negative direction), move along the Y direction (Y positive direction and Y negative direction), rotate around the X direction (clockwise and counterclockwise), and rotate around the Y direction (clockwise and counterclockwise).

[0087] When the driving device 202 has one connecting member, the connecting member can be used to fix the camera so that the camera follows the connecting member to move along the X direction (X positive direction and X negative direction), move along the Y direction (Y positive direction and Y negative direction), rotate around the X direction (clockwise and counterclockwise) and rotate around the Y direction (clockwise and counterclockwise).

[0088] When there are two connectors of the driving device 202, the two connectors can be used to fix the display screen and the camera respectively, and the union of the motion modes that the two connectors can perform is moving along the X direction (X positive direction and X negative direction), moving along the Y direction (Y positive direction and Y negative direction), rotating around the X direction (clockwise and counterclockwise), and rotating around the Y direction (clockwise and counterclockwise). In other words, one connector can have K types of the above four motion modes (K is greater than 0 and less than 4), and the other connector can have at least 4-K types of motion modes other than the above K types.

[0089] For example, Figure 6 According to some embodiments of the present application, a schematic diagram of a detection device 200 detecting uneven defects of a display screen 30 is shown.

[0090] refer to Figure 6 , the display screen 30 is fixed (for example, it can be fixed on a certain carrier), the camera 203 can be fixed on the connecting member 2021 of the driving device 202, and the driving device 202 can drive the device 202 to move along the X direction (X positive direction and X negative direction), move along the Y direction (Y positive direction and Y negative direction), rotate around the X direction (counterclockwise and clockwise) and rotate around the Y direction (counterclockwise and clockwise), thereby driving the camera 203 to move along the X direction (X positive direction and X negative direction), move along the Y direction (Y positive direction and Y negative direction), rotate around the X direction (counterclockwise and clockwise) and rotate around the Y direction (counterclockwise and clockwise).

[0091] When it is necessary to detect uneven defects of the display screen 30, the computing device 201 (or other device) can control the display screen 30 to display an image with uniform brightness (for example, a pure color image). Then, the computing device 201 can drive the camera 203 to move and / or rotate through the driving device 202, so that the camera 203 can collect detection images corresponding to different sub-display areas of the display screen 30, and when the camera 203 collects the detection image corresponding to any sub-display area, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area captured by the camera 203 in the display screen 30.

[0092] When the computing device 201 obtains the detection images corresponding to different sub-display areas of the display screen 30, it can determine whether there is an image area with uneven brightness in each detection image. If there is an image area with uneven brightness in a certain detection image, the computing device 201 can determine that there is an uneven defect in the area corresponding to the image area with uneven brightness in the display screen 30 when the image area with uneven brightness meets the aforementioned uneven condition.

[0093] In some embodiments, the computing device 201 may also send detection images of different sub-display areas of the display screen 30 to other devices (such as a server, etc.), and the server determines whether there is an image area with uneven brightness that meets the uneven condition in each detection image, and sends the judgment result to the computing device 201.

[0094] Optionally, the driving device 202 and the camera 203 may be integrated into the same device, or may be separate devices, which is not limited here.

[0095] Optionally, when the resolution of the camera 203 in the X direction (e.g., the number of pixels in the X direction) is greater than the resolution of the display screen 30 in the X direction (e.g., the number of pixels in the X direction), the driving device 202 may be a driving device capable of driving the camera 203 to move in the Y direction, rotate around the X direction, and rotate around the Y direction, which is not limited here.

[0096] Optionally, when the resolution of the camera 203 in the Y direction (e.g., the number of pixels in the Y direction) is greater than the resolution of the display screen 30 in the Y direction (e.g., the number of pixels in the Y direction), the driving device 202 may be a driving device capable of driving the camera 203 to move in the X direction, rotate around the X direction, and rotate around the Y direction, which is not limited here.

[0097] Optionally, the driving unit of the driving device 202 that drives the camera 203 to move along the X direction or the Y direction includes a guide rail or other structure or device that can drive the carrier to move along a straight line.

[0098] Optionally, the driving unit of the driving device 202 that drives the camera 203 to rotate around the X direction or the Y direction includes a rotating shaft or other structure or device that can drive the carrier to rotate around a certain direction.

[0099] Optionally, the driving device 202 may also be other driving devices that can drive the camera 203 fixed on the connecting member 2021 to perform the aforementioned movement, such as an articulated robot, a robotic arm, etc. The embodiment of the present application does not limit the specific form of the driving device.

[0100] Exemplarily, in some embodiments, the driving device 202 can capture detection images of different sub-display areas of the display screen 30 by driving the display screen 30 to move and / or rotate, and ensure that when the camera 203 captures the detection image corresponding to any sub-display area, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area captured by the camera 203 in the display screen 30.

[0101] For example, Figure 7 According to some embodiments of the present application, a schematic diagram of another detection device 200 detecting uneven defects of a display screen 30 is shown.

[0102] refer to Figure 7 , the camera 203 is fixed (for example, it can be fixed on a bracket), the display screen 30 can be fixed on the connecting member 2021 of the driving device 202, and the driving device 202 can drive the connecting member 2021 to move along the X direction (X positive direction and X negative direction), move along the Y direction (Y positive direction and Y negative direction), rotate around the X direction (clockwise and counterclockwise), and rotate around the Y direction (clockwise and counterclockwise), thereby driving the display screen 30 to move along the X direction (X positive direction and X negative direction), move along the Y direction (Y positive direction and Y negative direction), rotate around the X direction (clockwise and counterclockwise), and rotate around the Y direction (clockwise and counterclockwise).

[0103] When it is necessary to detect uneven defects of the display screen 30, the computing device 201 (or other device) can control the display screen 30 to display an image with uniform brightness (for example, a pure color image). Then, the computing device 201 can drive the display screen 30 to move and / or rotate through the driving device 202, so that the camera 203 can collect detection images corresponding to different sub-display areas of the display screen 30, and when the camera 203 collects the detection image corresponding to any sub-display area, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area captured by the camera 203 in the display screen 30.

[0104] When the computing device 201 obtains the detection images corresponding to different sub-display areas of the display screen 30, it can determine whether there is an image area with uneven brightness in each detection image. If there is an image area with uneven brightness in a certain detection image, the computing device 201 can determine that there is an uneven defect in the area corresponding to the image area with uneven brightness in the display screen 30 when the image area with uneven brightness meets the aforementioned uneven condition.

[0105] In some embodiments, the computing device 201 may also send detection images of different sub-display areas of the display screen 30 to other devices (such as a server, etc.), and the server determines whether there is an image area with uneven brightness that meets the uneven condition in each detection image, and sends the judgment result to the computing device 201.

[0106] Optionally, when the resolution of the camera 203 in the X direction (e.g., the number of pixels in the X direction) is greater than the resolution of the display screen 30 in the X direction (e.g., the number of pixels in the X direction), the driving device 202 may be a driving device capable of driving the display screen 30 to move in the Y direction, rotate around the X direction, and rotate around the Y direction, which is not limited here.

[0107] Optionally, when the resolution of the camera 203 in the Y direction (e.g., the number of pixels in the Y direction) is greater than the resolution of the display screen 30 in the Y direction (e.g., the number of pixels in the Y direction), the driving device 202 may be a driving device capable of driving the display screen 30 to move along the X direction, rotate around the X direction, and rotate around the Y direction, which is not limited here.

[0108] Optionally, the driving unit of the driving device 202 that drives the display screen 30 to move along the X direction or the Y direction includes a guide rail or other structure or device that can drive the carrier to move along a straight line.

[0109] Optionally, the driving unit of the driving device 202 that drives the display screen 30 to rotate around the X direction or the Y direction includes a rotating shaft or other structure or device that can drive the carrier to rotate around a certain direction.

[0110] Optionally, the driving device 202 may also be other driving devices capable of driving the display screen 30 fixed on the connecting member 2021 to perform the aforementioned movement, such as an articulated robot, a robotic arm, etc. The embodiment of the present application does not limit the specific form of the driving device.

[0111] Exemplarily, in some embodiments, the driving device 202 can capture detection images of different sub-display areas of the display screen 30 by driving the display screen 30 to move and driving the camera 30 to rotate, and ensure that when the camera 203 captures the detection image corresponding to any sub-display area, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area captured by the camera 203 in the display screen 30.

[0112] For example, Figure 8 According to some embodiments of the present application, a schematic diagram of another detection device 200 detecting uneven defects of a display screen 30 is shown.

[0113] refer to Figure 8 The driving device 202 includes a driving unit 202A and a driving unit 202B. The display screen 30 is fixed on the connecting member 2021A of the driving unit 202A, and the camera 203 is fixed on the connecting member 2021B of the driving unit 202B. The driving unit 202A can drive the connecting member 2021A to move along the X direction (X positive direction and X negative direction) and along the Y direction (Y positive direction and Y negative direction), thereby driving the display screen 30 to move along the X direction (X positive direction and X negative direction) and along the Y direction (Y positive direction and Y negative direction). The driving unit 202B can drive the connecting member 2021B to rotate around the X direction (clockwise and counterclockwise) and around the Y direction (clockwise and counterclockwise), thereby driving the camera 203 to rotate around the X direction (clockwise and counterclockwise) and around the Y direction (clockwise and counterclockwise).

[0114] When it is necessary to detect uneven defects of the display screen 30, the computing device 201 (or other device) can control the display screen 30 to display an image with uniform brightness (for example, a pure color image). Then, the computing device 201 can drive the display screen 30 to move through the driving unit 202A and drive the camera 203 to rotate through the driving unit 202B, so that the camera 203 can collect detection images corresponding to different sub-display areas of the display screen 30, and when the camera 203 collects the detection image corresponding to any sub-display area, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area captured by the camera 203 in the display screen 30.

[0115] When the computing device 201 obtains the detection images corresponding to different sub-display areas of the display screen 30, it can determine whether there is an image area with uneven brightness in each detection image. If there is an image area with uneven brightness in a certain detection image, the computing device 201 can determine that there is an uneven defect in the area corresponding to the image area with uneven brightness in the display screen 30 when the image area with uneven brightness meets the aforementioned uneven condition.

[0116] In some embodiments, the computing device 201 may also send detection images of different sub-display areas of the display screen 30 to other devices (such as a server, etc.), and the server determines whether there is an image area with uneven brightness that meets the uneven condition in each detection image, and sends the judgment result to the computing device 201.

[0117] Optionally, when the resolution of the camera 203 in the X direction (eg, the number of pixels in the X direction) is greater than the resolution of the display screen 30 in the X direction (eg, the number of pixels in the X direction), the driving unit 202A may be a driving device capable of driving the display screen 30 to move along the Y direction.

[0118] Optionally, when the resolution of the camera 203 in the Y direction (eg, the number of pixels in the Y direction) is greater than the resolution of the display screen 30 in the Y direction (eg, the number of pixels in the Y direction), the driving unit 202A may be a driving device capable of driving the display screen 30 to move along the X direction.

[0119] Optionally, the driving unit of the driving part 202A that drives the display screen 30 to move along the X direction or the Y direction includes a guide rail or other structure or device that can drive the carrier to move along a straight line.

[0120] Optionally, the driving device 202A may also be other driving devices capable of driving the display screen 30 fixed on the connecting member 2021A to perform the aforementioned movement, such as an articulated robot, a robotic arm, etc. The embodiment of the present application does not limit the specific form of the driving device.

[0121] Optionally, the driving unit of the driving part 202B driving the camera 203 to rotate around the X direction or the Y direction includes a rotating shaft or other structure or device that can drive the carrier to rotate around a certain direction.

[0122] Optionally, the driving device 202B may also be other driving devices that can drive the camera 203 fixed on the connecting member 2021B to perform the aforementioned movement, such as an articulated robot, a robotic arm, etc. The embodiment of the present application does not limit the specific form of the driving device.

[0123] Exemplarily, in some embodiments, the driving device 202 can capture detection images of different sub-display areas of the display screen 30 by driving the display screen 30 to rotate and driving the camera 30 to move, and ensure that when the camera 203 captures the detection image corresponding to any sub-display area, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area captured by the camera 203 in the display screen 30.

[0124] For example, Fig. 9 According to some embodiments of the present application, a schematic diagram of another detection device 200 detecting uneven defects of a display screen 30 is shown.

[0125] refer to Fig. 9 The driving device 202 includes a driving unit 202C and a driving unit 202D. The display screen 30 is fixed on the connecting member 2021C of the driving unit 202C, and the camera 203 is fixed on the connecting member 2021D of the driving unit 202D. The driving unit 202C can drive the connecting member 2021C to rotate around the X direction (clockwise and counterclockwise) and around the Y direction (clockwise and counterclockwise), thereby driving the display screen 30 to rotate around the X direction (clockwise and counterclockwise) and around the Y direction (clockwise and counterclockwise). The driving unit 202D can drive the connecting member 2021D to move along the X direction (X positive direction and X negative direction) and along the Y direction (Y positive direction and Y negative direction), thereby driving the camera 203 to move along the X direction (X positive direction and X negative direction) and along the Y direction (Y positive direction and Y negative direction).

[0126] When it is necessary to detect uneven defects of the display screen 30, the computing device 201 (or other device) can control the display screen 30 to display an image with uniform brightness (for example, a pure color image). Then, the computing device 201 can drive the display screen 30 to rotate through the driving unit 202C and drive the camera 203 to move through the driving unit 202D, so that the camera 203 can collect detection images corresponding to different sub-display areas of the display screen 30, and when the camera 203 collects the detection image corresponding to any sub-display area, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the sub-display area captured by the camera 203 in the display screen 30.

[0127] When the computing device 201 obtains the detection images corresponding to different sub-display areas of the display screen 30, it can determine whether there is an image area with uneven brightness in each detection image. If there is an image area with uneven brightness in a certain detection image, the computing device 201 can determine that there is an uneven defect in the area corresponding to the image area with uneven brightness in the display screen 30 when the image area with uneven brightness meets the aforementioned uneven condition.

[0128] In some embodiments, the computing device 201 may also send detection images of different sub-display areas of the display screen 30 to other devices (such as a server, etc.), and the server determines whether there is an image area with uneven brightness that meets the uneven condition in each detection image, and sends the judgment result to the computing device 201.

[0129] Optionally, when the resolution of the camera 203 in the X direction (eg, the number of pixels in the X direction) is greater than the resolution of the display screen 30 in the X direction (eg, the number of pixels in the X direction), the driving unit 202D may be a driving device capable of driving the camera 203 to move along the Y direction.

[0130] Optionally, when the resolution of the camera 203 in the Y direction (eg, the number of pixels in the Y direction) is greater than the resolution of the display screen 30 in the Y direction (eg, the number of pixels in the Y direction), the driving unit 202C may be a driving device capable of driving the camera 203 to move along the X direction.

[0131] Optionally, the driving unit of the driving part 202C that drives the display screen 30 to rotate around the X direction or the Y direction includes a rotating shaft or other structure or device that can drive the carrier to rotate around a certain direction.

[0132] Optionally, the driving device 202C may also be other driving devices capable of driving the display screen 30 fixed on the connecting member 2021C to perform the aforementioned movement, such as an articulated robot, a robotic arm, etc. The embodiment of the present application does not limit the specific form of the driving device.

[0133] Optionally, the driving unit of the driving part 202D driving the camera 203 to move along the X direction or the Y direction includes a guide rail or other structure or device that can drive the carrier to move along a straight line.

[0134] Optionally, the driving device 202D may also be other driving devices that can drive the camera 203 fixed on the connecting member 2021D to perform the aforementioned movement, such as an articulated robot, a robotic arm, etc. The embodiment of the present application does not limit the specific form of the driving device.

[0135] based on Figures 3 to 9 In the embodiment shown, the present application also provides a detection method.

[0136] For example, Fig.10 According to some embodiments of the present application, a schematic flow chart of a detection method is shown.

[0137] like Fig.10 As shown, the method comprises the following steps:

[0138] S1001: The computing device 201 determines a plurality of sub-display areas according to parameters of a display screen to be detected.

[0139] For example, the computing device 201 may determine multiple sub-display areas according to the size and resolution of the display screen to be detected and the resolution of the camera 203, so as to ensure that the resolution of the camera is greater than the resolution of each sub-display area (for example, greater than twice the resolution of each sub-display area). Figure 4A In the scenario shown, the computing device 201 may determine the sub-display area D1, the sub-display area D2, the sub-display area D3, and the sub-display area D4.

[0140] In some embodiments, the difference in the main light directions of the light emitting units in the sub-display area determined by the computing device 201 is less than a preset value. For example, the maximum value of the angles between the main light directions of the light emitting units is less than a preset angle.

[0141] S1002: The computing device 201 determines a reference direction of a first sub-display area to be detected.

[0142] The computing device 201 determines a reference direction of the first sub-display area to be detected.

[0143] In some embodiments, the reference direction of the first sub-display area may be the main light direction of the light-emitting unit in the center of the first sub-display area, the average direction of the main light directions of the light-emitting units in the first sub-display area, the average direction of the main light directions of multiple light-emitting units in the central area of ​​the first sub-display area, etc.

[0144] In some embodiments, the computing device 201 may also determine the reference directions corresponding to all the sub-display areas at one time.

[0145] S1003: The computing device 201 drives the camera 203 and / or the display screen to be detected to move based on the driving device 202, so that the camera 203 captures the first sub-display area and the optical axis direction of the camera 203 is the same as the reference direction of the first sub-display area.

[0146] The computing device 201 can send a control signal to the driving device 202 so that the driving device 202 drives the camera 203 and / or the display screen to be detected to move, so that the camera 203 captures the first sub-display area and the optical axis direction of the camera 203 is the same as the reference direction of the first sub-display area (that is, the optical axis direction of the camera 203 matches the main light direction of the light-emitting unit in the first sub-display area).

[0147] S1004: The computing device 201 collects a detection image corresponding to the first sub-display area based on the camera 203.

[0148] When the camera 203 captures the first sub-display area and the optical axis direction of the camera 203 is the same as the reference direction of the first sub-display area, the computing device 201 may send a capture instruction to the camera 203 to acquire a detection image corresponding to the first sub-display area.

[0149] S1005: The computing device 201 determines whether the detection images of all sub-display areas have been collected.

[0150] After collecting the detection image corresponding to the first sub-display area, the computing device 201 determines whether the detection images of all sub-display areas have been collected. If the computing device 201 determines that the detection images of all sub-display areas have been collected, it goes to step S1006; otherwise, it goes to step S1002 and executes steps S1002 to S1005.

[0151] S1006: The computing device 201 determines whether the display screen to be inspected has uneven defects based on the multiple inspection images corresponding to the multiple sub-display areas.

[0152] When the detection images of all sub-display areas have been collected, the computing device 201 determines whether the display screen to be detected has uneven defects based on multiple detection images corresponding to multiple sub-display areas.

[0153] For example, the computing device 201 may determine that there is an uneven defect in an area of ​​the display screen to be inspected that corresponds to the image area with uneven brightness when there is an image area with uneven brightness in one of the multiple inspection images and the image area with uneven brightness satisfies the aforementioned uneven condition.

[0154] In some embodiments, the computing device may also send multiple detection images corresponding to multiple sub-display areas to other devices, such as a server, and the server determines whether there is an uneven defect on the display screen to be detected, which is not limited here.

[0155] In some embodiments, the computing device 201 may also directly determine whether there is an uneven defect in a sub-display area after acquiring a detection image of the sub-display area, which is not limited here.

[0156] Based on the above method, since the optical axis direction of the camera 203 matches the main light direction of the light emitting unit in the sub-display area when the camera 203 collects the detection image of the sub-display area, it can avoid uneven brightness of the detection image caused by different main light directions of the light emitting units in the sub-display area, which is conducive to improving the detection accuracy. In addition, since the camera 203 does not collect the entire display area of ​​the display screen at one time, the camera 203 can collect a camera with a lower resolution, which is conducive to reducing costs.

[0157] further, Fig.11 According to some embodiments of the present application, a schematic diagram of the structure of a computing device 201 is shown.

[0158] like Fig.11 As shown, computing device 201 includes processor 210 , memory 220 , communication interface 230 , and bus 240 .

[0159] The processor 210 may include one or more processing units, for example, the processor 210 may include a central processing unit (CPU), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a microcontroller unit (MCU), a video codec, a digital signal processor (DSP), a baseband processor, a neural network processor (NPU), a field programmable gate array (FPGA), etc. In some embodiments, different processing units may be independent devices or integrated into one or more processors.

[0160] In some embodiments, the processor 210 may be configured to execute one or more programs to implement the methods provided in the aforementioned embodiments.

[0161] For example, the processor 210 can be used to execute instructions for determining a sub-display area of ​​a display screen to be detected, execute instructions for controlling the driving device 201 to drive the camera 203 and / or the display screen to be detected to move, execute instructions for sending a shooting instruction to the camera 203, execute instructions for determining an image area with uneven brightness in a detection image based on the detection image, execute instructions for determining whether an image area with uneven brightness satisfies an uneven condition, etc.

[0162] The memory 220 may include one or more memories for storing data or program codes. For example, in some embodiments, the memory 220 may be used to store data sent by other devices, etc. For another example, in some embodiments, the memory 220 may be used to store instructions of the communication methods provided in the aforementioned embodiments.

[0163] In some embodiments, the memory 220 may include a hard disk drive, a solid state drive, a flash memory, an optical disk, or a magneto-optical disk.

[0164] In some embodiments, memory 220 may include removable or non-removable or fixed media.

[0165] In some embodiments, memory 220 may be internal or external to computing device 201 .

[0166] The communication interface 230 is used to implement communication between the computing device 201 and other devices. For example, the computing device 201 can send a shooting instruction to the camera 203, send an instruction to drive the camera 203 and / or the display screen to be detected to move / rotate to the driving device 204, obtain a detection image captured by the camera 203, send a detection image to other devices, receive a detection result from other devices, etc. through the communication interface 230.

[0167] It should be understood that Fig.11 The structure of the computing device 201 is only an example. In other embodiments, the computing device 201 may include more or fewer modules, which is not limited here.

[0168] It should be understood that the computing device 201 can be any electronic device, including but not limited to a mobile phone, a tablet computer, a laptop computer, a desktop computer, an industrial computer, etc. The embodiment of the present application does not limit the specific form of the computing device 201.

[0169] In the accompanying drawings, some structural or method features may be shown in a specific arrangement and / or order. However, it should be understood that such a specific arrangement and / or order may not be required. Instead, in some embodiments, these features may be arranged in a manner and / or order different from that shown in the illustrative drawings. In addition, the inclusion of structural or method features in a particular figure does not mean that such features are required in all embodiments, and in some embodiments, these features may not be included or may be combined with other features.

[0170] It should be noted that in the examples and description of this patent, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "includes one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A screen detection device, characterized in that: include: A driving device, a camera and a computing device; wherein, The driving device includes a first connecting member, and the first connecting member is used to fix the camera or the screen; and Corresponding to the first connecting member being located at the first position, the shooting range of the camera is the first sub-display area of ​​the screen, and the optical axis direction of the camera matches the main light direction of the light-emitting unit in the first sub-display area; Corresponding to the first connecting member being located at the second position, the shooting range of the camera is the second sub-display area of ​​the screen, and the optical axis direction of the camera matches the main light direction of the light-emitting unit in the second sub-display area; The computing device is used to determine that there is an uneven defect in an area of ​​the screen corresponding to the first image area when there is a first image area satisfying a first condition in a first detection image captured by the camera when the first connecting member is located at the first position.

2. The device according to claim 1, characterized in that The brightness of the first image area is different from the brightness of other areas outside the first image area in the first detection image; and the first condition includes at least one of the following conditions: A contrast ratio between the brightness of the first image area and the brightness of other image areas in the first detection image except the first image area is greater than a first value; The size of the first image area is greater than a second value; A quality factor of the first image region is greater than a third value, wherein the quality factor is used to indicate a sensitivity of a human eye to a domain of the first image region.

3. The device according to claim 2, characterized in that The quality factor of the first image area is determined based on the resolution of the first sub-display area, the resolution of the camera, the size of the first image area, the angular resolution of the area in the first sub-display area corresponding to the first image area, and the contrast between the brightness of the first image area and the brightness of other image areas in the detection image except the first image area.

4. The device according to claim 3, characterized in that The quality factor is determined by the following formula: Among them, C is the contrast between the brightness of the first image area and the brightness of other image areas in the first detection image except the first image area; ɑ×b is the resolution of the camera, c×d is the resolution of the first image area, S is the size of the first image area, PDDX is the angular resolution of the area corresponding to the first image area in the screen in the first direction, and PDDY is the angular resolution of the area corresponding to the first image area in the screen in the second direction; e1 and e2 are empirical values ​​or experimental values, the first direction is perpendicular to the second direction, and the plane where the first direction and the second direction are located is parallel to the plane where the display area of ​​the screen is located.

5. The device according to claim 4, characterized in that e1=0.711, e2=0.

72.

6. The device according to any one of claims 1 to 5, characterized in that The device comprises a first reference direction and a second reference direction which are perpendicular to each other, and the planes where the first reference direction and the second reference direction are located are parallel to the display area of ​​the screen, and the camera is fixed to the first connecting member; and, The driving device is used to drive the first connecting member to move in at least one of the following ways: moving along the first reference direction, moving along the second reference direction, rotating around the first reference direction, and rotating around the second reference direction, so that the first connecting member is located in the first position or the second position.

7. The device according to claim 6, characterized in that The driving device further includes a second connecting member, and the screen is fixed to the second connecting member; and when the first connecting member is located at the first position, the second connecting member is located at a third position, and when the first connecting member is located at the second position, the second connecting member is located at a fourth position.

8. The device according to claim 7, characterized in that The driving device is also used to drive the second connecting member to move in at least one of the following ways: moving along the first reference direction, moving along the second reference direction, rotating around the first reference direction, and rotating around the second reference direction, so that the second connecting member is located in the third position or the fourth position.

9. The device according to any one of claims 1 to 5, characterized in that The device comprises a first reference direction and a second reference direction which are perpendicular to each other, and the plane where the first reference direction and the second reference direction are located is parallel to the display area of ​​the screen, and the screen is fixed to the first connecting member; and, The driving device is used to drive the first connecting member to move in at least one of the following ways: moving along the first reference direction, moving along the second reference direction, rotating around the first reference direction, and rotating around the second reference direction, so that the first connecting member is located in the first position or the second position.

10. The device according to claim 8, characterized in that The driving device also includes a third connecting member, and the camera is fixed to the third connecting member; and when the first connecting member is located at the first position, the third connecting member is located at the fifth position, and when the first connecting member is located at the second position, the second connecting member is located at the sixth position.

11. The device according to claim 10, characterized in that The driving device is also used to drive the third connecting member to move in at least one of the following ways: moving along the first reference direction, moving along the second reference direction, rotating around the first reference direction, and rotating around the second reference direction, so that the third connecting member is located in the fifth position or the sixth position.

Images