Multi-view detection device and detection system for a display panel

Abstract

An embodiment of the present invention discloses a multi-view detection device and a detection system for a display panel. The detection device includes at least two side-view detection modules and a direction adjustment module. Each side-view detection module includes an image acquisition unit and an image processing unit; the image acquisition unit is used to acquire the display screen of the display panel to be tested, and the image processing unit is used to determine the display screen parameters of the display panel to be detected; at least one of the side-view detection modules further includes a shift unit, which is connected between the image acquisition unit and the image processing unit and is used to adjust the angle between the image processing unit and the image acquisition unit. The direction adjustment module is used to adjust the light transmission direction of the display screen of the display panel to be tested. The technical solution provided by the embodiment of the present invention facilitates the adjustment of the test angle, shortens the overall detection time, reduces the occupied space of the detection device, and improves the detection efficiency.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of visual inspection of display screens, and in particular, to a multi-view detection device and a detection system for a display panel. Background Art

[0002] When multi-view detection of a display panel is required, multiple cameras are generally used for multi-angle shooting to collect the display conditions of the display panel at multiple viewing angles, so as to detect the defects presented by the display panel at different viewing angles.

[0003] Figure 1 is a schematic structural diagram of a multi-view detection device for a display panel provided in the prior art; refer to Figure 1 , the multi-view detection device includes a main-view camera 1 and at least two side-view cameras 2. Usually, it is required that the detection angles of the side-view cameras 2 in the multi-camera detection scheme are adjustable (oblique view 45 degrees, adjustable range is plus or minus 15 degrees), so that the distances between the side-view cameras 2 are relatively far apart. Fixing multiple side-view cameras 2 occupies a large space, and when taking oblique-view photos, due to the depth of field, it is impossible to focus on the entire display area of the display panel P (the far-side edge is blurred). It is necessary to reduce the aperture of the camera lens and increase the exposure time to achieve full focus. The angle adjustment is inconvenient, which affects the overall detection time and results in a decrease in detection efficiency. Summary of the Invention

[0004] The embodiments of the present invention provide a multi-view detection device and a detection system for a display panel, so as to facilitate the adjustment of the test angle, shorten the overall detection time, reduce the occupied space of the detection device, and improve the detection efficiency.

[0005] In a first aspect, the embodiments of the present invention provide a multi-view detection device for a display panel, including a main-view detection module, and further including:

[0006] At least two side-view detection modules, each of the side-view detection modules includes an image acquisition unit and an image processing unit; the image acquisition unit is used to acquire the display screen of the display panel to be tested, and the image processing unit is used to receive the display screen and process the display screen to determine the display screen parameters of the display panel to be detected; at least one of the side-view detection modules further includes a shift unit, which is connected between the image acquisition unit and the image processing unit; the shift unit is used to adjust the angle between the image processing unit and the image acquisition unit;

[0007] A direction adjustment module, configured to adjust the light transmission direction of the display screen of the display panel to be measured. The shift unit and the direction adjustment module enable the image plane of the display screen within the direction adjustment module, the central plane of the image acquisition unit, and the plane where the display screen received by the image processing unit intersect at a straight line.

[0008] Optionally, the direction adjustment module includes:

[0009] At least a pair of planar reflection lenses; a pair of planar reflection lenses are arranged on opposite sides of the display panel to be measured, and each planar reflection lens and one side view angle detection module are located on one side of the display panel to be measured. The planar reflection lens is used to adjust the light transmission direction of the display screen of the display panel to be measured.

[0010] Optionally, the planar reflection lens is at least 10 mm away from the adjacent edge of the display panel to be measured along a first direction; wherein, the first direction is the horizontal direction in which one planar reflection lens points to the other planar reflection lens.

[0011] Optionally, the length of the planar reflection lens along a second direction is greater than the length of the display panel to be measured along the first direction by at least 10 mm; the length of the planar reflection lens along a third direction is greater than the length of the display panel to be measured along the third direction by at least 10 mm; wherein, the second direction is the thickness direction of the display panel to be measured; the third direction is perpendicular to the first direction.

[0012] Optionally, the direction adjustment module further includes:

[0013] At least a pair of angle adjustment motors; each angle adjustment motor is correspondingly connected to one end of the planar reflection lens close to the display panel to be measured; the angle adjustment motor is used to adjust the included angle between the plane where the planar reflection lens is located and the second direction.

[0014] Optionally, the included angle between the plane where the planar reflection lens is located and the second direction is less than or equal to 15°.

[0015] Optionally, the image acquisition unit includes a lens, and the central plane of the lens is the central plane of the image acquisition unit; the included angle between the central plane of the lens and the plane where the display panel to be measured is located is adjustable.

[0016] Optionally, the image processing unit includes a photosensitive chip, and the plane where the photosensitive chip is located is the plane where the display screen received by the image processing unit is located, and the included angle between the plane where the photosensitive chip is located and the plane where the display panel to be measured is located is fixed.

[0017] Optionally, the included angle between the plane where the photosensitive chip is located and the plane where the display panel to be measured is located is 45°.

[0018] In a second aspect, an embodiment of the present invention provides a detection system, including a multi-view detection device for a display panel as described in any one of the first aspects.

[0019] The multi-view detection device for a display panel provided by the embodiment of the present invention includes: at least two side-view detection modules and a direction adjustment module. At least one of the side-view detection modules includes a shift unit, and the side-view detection module can adjust the detection angle through the shift unit. The direction adjustment module is used to adjust the light transmission direction of the display picture of the display panel to be measured. The technical solution provided by the embodiment of the present invention realizes the multi-view detection of the display panel through the shift unit and the direction adjustment module, avoiding the problem of large space occupation for placing the detection device in the prior art, and does not require reducing the lens aperture and increasing the exposure. It is convenient to adjust the test angle, shortens the overall detection time, reduces the occupied space of the detection device, and improves the detection efficiency. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a multi-view detection device for a display panel provided in the prior art;

[0021] Figure 2 is a schematic structural diagram of a multi-view detection device for a display panel provided by an embodiment of the present invention;

[0022] Figure 3 is a schematic structural diagram of another multi-view detection device for a display panel provided by an embodiment of the present invention;

[0023] Figure 4 is an optical path diagram of the imaging of a detection device provided by an embodiment of the present invention. Detailed Embodiments

[0024] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0025] An embodiment of the present invention provides a multi-view detection device for a display panel, Figure 2 is a schematic structural diagram of a multi-view detection device for a display panel provided by an embodiment of the present invention. Referring to Figure 2 , the multi-view detection device includes a main-view detection module 10, and further includes:

[0026] At least two side-view detection modules 20, each side-view detection module 20 including an image acquisition unit 22 and an image processing unit 21; the image acquisition unit 22 is configured to acquire a display screen of a display panel A to be measured, and the image processing unit 21 is configured to receive the display screen and process the display screen to determine display screen parameters of the display panel A to be detected; at least one side-view detection module 20 further includes a shift unit 23, connected between the image acquisition unit 22 and the image processing unit 21; the shift unit 23 is configured to adjust the angle between the image processing unit 21 and the image acquisition unit 22;

[0027] A direction adjustment module 30, configured to adjust the light transmission direction of the display screen of the display panel A to be measured, and the shift unit 23 and the direction adjustment module 30 cause the plane where the image of the display screen in the direction adjustment module 30 is located, the central plane of the image acquisition unit 22, and the plane where the display screen received by the image processing unit 21 intersect at a straight line.

[0028] Specifically, the main-view detection module 10 can be arranged facing the display screen of the display panel A to be detected, and the light emitted from the display screen of the display panel A to be measured is vertically incident on the image acquisition unit 22 of the main-view detection module 10, that is, the main-view detection module 10 is used to detect the display condition of the display panel to be measured when looking directly at the display panel A. At least two side-view detection modules 20 are located on the periphery of the main-view detection module 10, and the side-view detection module 20 is arranged at a certain angle with the display screen of the display panel A to be detected, and the light emitted from the display screen of the display panel A to be measured is incident on the image acquisition unit 22 of the side-view detection module 20 at a certain angle, that is, the side-view detection module 20 is used to detect the display condition of the display panel to be measured when looking at the display panel A from the side. The side-view detection modules 20 can be evenly spaced on the periphery of the main-view detection module 10. For example, when two side-view detection modules 20 are included, the two side-view detection modules 20 are symmetrically arranged on the left and right sides of the main-view detection module 10 (refer to Figure 1 ). Through the comprehensive detection of the side-view detection module 20 and the main-view detection module 10, most of the viewing angles of the display screen of the display panel to be measured can be covered, so that the detection of defects of the display panel to be measured at different viewing angles can be realized. The side-view detection modules 20 can also be arranged on the periphery of the main-view detection module 10 at different intervals, and the interval between the side-view detection modules 20 is not limited here.

[0029] The shift unit 23 can enable the image acquisition unit 22 to achieve the functions of inclination and offset, thereby adjusting the angle between the image processing unit 21 and the image acquisition unit 22. For example, the side view detection module 20 with the shift unit 23 can be a shift camera. The main feature of a shift camera is that its lens (or the lens board mounting the lens) and the back for mounting the film can be displaced or twisted through a flexible connector (such as a bellows) to change the perspective effect and clarity range of the image. The use of the shift unit 23 can reduce the distance between the side view detection module 20 and the main view detection module 10 on the basis of ensuring that the display panel is defective when the side view detection module 20 detects the side view of the display panel to be measured, thereby reducing the occupied space of the detection device. The side view detection module 20 with the shift unit 23 can be one or two.

[0030] In addition, the direction adjustment module 30 of the multi-view detection device is used to adjust the light transmission direction of the display screen of the display panel A to be measured. During the detection process of the multi-view detection device of the display panel, the technical solution provided by the embodiment of the present invention adjusts the test angle of the side view detection module 20 through the shift unit 23, and adjusts the light transmission direction of the display screen of the display panel A to be measured through the direction adjustment module 30, so that the image plane of the display screen in the direction adjustment module 30, the central plane of the image acquisition unit 22, and the plane where the display screen received by the image processing unit 21 intersect at a straight line, so that the image acquisition unit 22 obtains a clear detection screen. The image processing unit 21 receives the display screen of the display panel A to be measured acquired by the image acquisition unit 22, and processes the display screen to determine the display screen parameters of the display panel A to be detected, thereby realizing the detection of the display panel A to be measured. Since at least one side view detection module 20 has a shift unit 23, and a clear detection screen can be obtained in combination with the cooperation of the direction adjustment module 20, the problem of large occupied space for placing side view cameras in the prior art is avoided, and it is not necessary to reduce the lens aperture and increase the exposure time. The technical solution provided by the embodiment of the present invention is convenient for adjusting the test angle, shortens the overall detection time, reduces the occupied space of the detection device, and improves the detection efficiency.

[0031] Optionally, Figure 3 is a schematic structural diagram of another multi-view detection device for a display panel provided by an embodiment of the present invention. Refer to Figure 3 , the direction adjustment module 30 includes:

[0032] At least a pair of plane reflection lenses 31; a pair of plane reflection lenses 31 are arranged on opposite sides of the display panel A to be measured. Each plane reflection lens 31 and a side view detection module 20 are located on one side of the display panel A to be measured. The plane reflection lens 31 is used to adjust the light transmission direction of the display screen of the display panel A to be measured.

[0033] Specifically, the side-view detection module 20 receives the light of the display screen reflected by the planar reflection lens 31 on the opposite side. That is, the side-view detection module 20 is used to collect the images of the display panel A to be measured presented by the planar reflection lens 31 on the opposite side one by one. The image formed by the planar reflection lens 31 serves as the image plane in the direction adjustment module 30. By adjusting the angle of the planar reflection lens 31 and cooperating with the shift unit 23 to adjust the angle of the image acquisition unit 22, the plane where the image formed by the planar reflection lens 31 is located, the central plane of the image acquisition unit 22, and the plane where the display screen received by the image processing unit 21 intersect at a straight line, so that the image processing unit 21 can obtain a clear display screen.

[0034] Preferably, at least one pair of planar reflection lenses 31 are symmetrically arranged on both sides of the display panel A to be measured, and a shift unit 23 is connected between the image acquisition unit 22 and the image processing unit 21 of each side-view detection module 20, further meeting the requirement of detecting the display panel A to be measured from multiple perspectives by the detection device and reducing the occupied space of the device.

[0035] Optionally, continue to refer to Figure 3 , the planar reflection lens 31 is at least 10 mm away from the adjacent edge of the display panel to be measured along the first direction X; wherein, the first direction X is the horizontal direction in which one planar reflection lens 31 points to the other planar reflection lens 31.

[0036] Specifically, there may be a certain deviation in the sizes of different display panels A to be measured. Leaving at least 10 mm of clearance between the planar reflection lens 31 and the display panel A to be measured can ensure that each display panel A to be measured can be placed between a pair of oppositely arranged planar reflection lenses, avoiding the need to adjust the distance between the planar reflection lenses 31 during the next detection and increasing the detection time.

[0037] Optionally, continue to refer to Figure 3 , the length of the planar reflection lens 31 along the second direction Y is at least 10 mm greater than the length of the display panel to be measured along the first direction X; the length of the planar reflection lens 31 along the third direction Z is at least 10 mm greater than the length of the display panel A to be measured along the third direction Z; wherein, the second direction Y is the thickness direction of the display panel A to be measured; the third direction Z is perpendicular to the first direction X.

[0038] Specifically, the length of the planar reflection lens 31 along the second direction Y is greater than the length of the display panel A to be measured along the first direction X by at least 10 mm, so that the display image of the display panel A to be measured along the first direction X can be presented on the second direction Y of the planar reflection lens; the length of the planar reflection lens 31 along the third direction Z is greater than the length of the display panel A to be measured along the third direction Z by at least 10 mm, and both ends of the planar reflection lens 31 along the third direction Z protrude beyond both ends of the display panel A to be measured along the third direction Z, so that the display image of the display panel A to be measured along the third direction Z can be presented on the third direction Z of the planar reflection lens 31. This ensures the integrity of the display image of the display panel A to be measured in the planar reflection lens 31, and further ensures the integrity of the display image parameters of the display panel A to be detected determined.

[0039] Optionally, continuing to refer to Figure 3 , the direction adjustment module 30 further includes:

[0040] At least one pair of angle adjustment motors 32; each angle adjustment motor 32 is connected in one-to-one correspondence with one end of a planar reflection lens 31 close to the display panel A to be measured; the angle adjustment motor 32 is used to adjust the included angle between the plane where the planar reflection lens 31 is located and the second direction Y.

[0041] Specifically, Figure 4 is an optical path diagram of the imaging of a detection device provided by an embodiment of the present invention. Referring to Figure 4 , and combining Figure 3 , the angle adjustment motor 32 can adjust the included angle between the plane where the planar reflection lens 31 is located and the second direction Y to obtain images of different angles of the display panel A to be measured in the planar reflection lens 31. Combining with the shift unit 23 to adjust the angle of the image acquisition unit 22, so that the plane where the image B of the display panel A to be measured in the planar reflection lens 31 is located, the central plane of the image acquisition unit 22, and the plane where the real image C of the display image received by the image processing unit 21 intersect at a straight line (the intersection point O is the point seen from the side view straight line when the three planes intersect at a straight line), so that the image processing unit 21 can obtain a clear display image. In addition, using the angle adjustment motor 32 can record its own position during each detection, and can perform detections at the same detection angle, simplifying the adjustment mechanism for detecting different angles of the display panel A to be measured and improving the accuracy of the display image parameters.

[0042] Optionally, the included angle between the plane where the planar reflection lens 31 is located and the second direction Y is less than or equal to 15°.

[0043] Specifically, when the angle adjustment motor 32 adjusts the angle of the planar reflecting lens to 0°, the planar reflecting lens 31 is perpendicular to the plane where the display panel A to be measured is located. The absolute value of the angle adjusted by the angle adjustment motor 32 for the planar reflecting lens is less than or equal to 15°, that is, the planar reflecting lens 31 can be inclined 15° to the left based on the second direction Y and can be inclined 15° to the right based on the second direction Y. At this time, the angular range between the plane of the image B of the display screen of the display panel A to be measured in the planar reflecting lens 31 and the plane where the display panel A to be measured is located can be increased, so that the plane of the image B of the display screen of the display panel A to be measured in the planar reflecting lens 31, the central plane of the image acquisition unit 22, and the plane of the real image C of the display screen received by the image processing unit 21 intersect in a straight line within a larger angular range, meeting the requirements of different angle detections.

[0044] Optionally, the image acquisition unit 22 includes a lens, and the central plane of the lens is the central plane of the image acquisition unit 22; the included angle between the central plane of the lens and the plane where the display panel A to be measured is located is adjustable.

[0045] Specifically, the lens can be a camera lens of a camera or a camera lens of a mobile phone, as long as it can acquire the display screen of the display panel A to be measured. The type of the lens is not limited here. The central plane of the lens is the central plane of the lens components. For example, when the lens is composed of convex lenses, the central plane of the lens is the plane where the axis of the convex lens is located. The included angle between the central plane of the lens and the plane where the display panel A to be measured is located can be adjusted by the shift unit 23. By adjusting the included angle between the central plane of the lens and the plane where the display panel A to be measured is located, the shift unit 23 can adjust the angle between the image processing unit 21 and the image acquisition unit 22.

[0046] Optionally, the image processing unit 21 includes a photosensitive chip, and the plane where the photosensitive chip is located is the plane of the display screen received by the image processing unit 21, and the included angle between the plane where the photosensitive chip is located and the plane where the display panel A to be measured is located is fixed.

[0047] Specifically, the plane where the photosensitive chip is located is its surface. The photosensitive chip can be a Charge Coupled Device (CCD), which is made of a semiconductor material with high sensitivity. It can convert light into electric charges and then convert them into digital signals through an analog-to-digital converter chip, that is, convert the received optical signal into an electrical signal, and then determine the corresponding display screen parameters according to different electrical signals, so as to realize the detection of the display panel to be tested. The digital signal, that is, the screen parameters, is compressed and then stored in the flash memory or built-in hard disk card inside the camera, so that the data can be transmitted to the computer. The CCD consists of many photosensitive units, usually in units of millions of pixels. When the surface of the CCD is irradiated by light, each photosensitive unit will reflect the electric charge on the component, and the signals generated by all the photosensitive units are added together to form a complete picture.

[0048] Optionally, the included angle between the plane where the photosensitive chip is located and the plane where the display panel A to be tested is located is 45°.

[0049] The human eye is more comfortable looking at the display panel within an included angle of 45° (±15°) of squint. Therefore, the included angle between the plane where the image processing unit 21 of the side viewing angle detection module 20 is located and the plane where the display panel A to be tested is located is fixed at 45°, that is, the included angle between the plane where the photosensitive chip is located and the plane where the display panel A to be tested is located is 45°, meeting the detection of the 45° side view of the display panel to be tested. The included angle between the plane where the image acquisition unit 22 of the side viewing angle detection module 20 is located and the plane where the display panel A to be tested is adjustable. Therefore, on the basis that the absolute value of the angle of the plane reflecting mirror is adjusted by the angle adjustment motor 32 and is less than or equal to 15°, combined with the adjustment of the angle of the image acquisition unit 22 by the shift unit 23, the side viewing angle detection module 20 can perform detection within an included angle range of ±15° based on a 45° squint. Thus, on the basis of ensuring that the side viewing angle detection module 20 detects the side viewing angle of the display panel to be tested with panel defects, the distance between the side viewing angle detection module 20 and the main viewing angle detection module 10 is reduced, realizing the reduction of the occupied space of the detection device while the position of the side viewing angle detection module is fixed.

[0050] The embodiment of the present invention also provides a detection system, including the multi-view detection device for the display panel as described in any of the above embodiments, which has the same technical effects and will not be elaborated here.

[0051] Note that the above is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A multi-view detection device for a display panel, including a main-view detection module, characterized in that, it further includes: At least two side-view detection modules, each of the side-view detection modules includes an image acquisition unit and an image processing unit; the image acquisition unit is used to acquire the display screen of the display panel to be measured, and the image processing unit is used to receive the display screen and process the display screen to determine the display screen parameters of the display panel to be measured; at least one of the side-view detection modules further includes a shift unit, which is connected between the image acquisition unit and the image processing unit; the shift unit is used to adjust the angle between the image processing unit and the image acquisition unit; A direction adjustment module, which is used to adjust the light transmission direction of the display screen of the display panel to be measured, and the shift unit and the direction adjustment module make the plane where the image of the display screen in the direction adjustment module is located, the central plane of the image acquisition unit, and the plane where the display screen received by the image processing unit intersect at a straight line; The direction adjustment module includes: At least a pair of plane reflection lenses; a pair of plane reflection lenses are arranged on opposite sides of the display panel to be measured, and each plane reflection lens and one of the side-view detection modules are located on one side of the display panel to be measured, and the plane reflection lens is used to adjust the light transmission direction of the display screen of the display panel to be measured; Wherein, a shift unit is connected between the image acquisition unit and the image processing unit of each side-view detection module.

2. The multi-view detection device for a display panel according to claim 1, characterized in that, The plane reflection lens is at least 10 mm away from the adjacent edge of the display panel to be measured along the first direction; wherein, the first direction is the horizontal direction in which one plane reflection lens points to the other plane reflection lens.

3. The multi-view detection device for a display panel according to claim 2, characterized in that, The length of the plane reflection lens along the second direction is greater than the length of the display panel to be measured along the first direction by at least 10 mm; the length of the plane reflection lens along the third direction is greater than the length of the display panel to be measured along the third direction by at least 10 mm; wherein, the second direction is the thickness direction of the display panel to be measured; the third direction is perpendicular to the first direction.

4. The multi-view detection device for a display panel according to claim 3, characterized in that, The direction adjustment module further includes: At least a pair of angle adjustment motors; each angle adjustment motor is correspondingly connected to one end of a plane reflection lens close to the display panel to be measured; the angle adjustment motor is used to adjust the included angle between the plane where the plane reflection lens is located and the second direction.

5. The multi-view detection device for a display panel according to claim 4, characterized in that, The included angle between the plane where the plane reflection lens is located and the second direction is less than or equal to 15°.

6. The multi-view detection device for a display panel according to claim 1, characterized in that, The image acquisition unit includes a lens, and the central plane of the lens is the central plane of the image acquisition unit; the angle between the central plane of the lens and the plane where the display panel to be measured is located is adjustable.

7. The multi-view detection device for a display panel according to claim 6, wherein, the image processing unit includes a photosensitive chip, the plane where the photosensitive chip is located is the plane where the display picture received by the image processing unit is located, and the angle between the plane where the photosensitive chip is located and the plane where the display panel to be measured is located is fixed.

8. The multi-view detection device for a display panel according to claim 7, wherein, the photosensitive chip is a charge coupled device.

9. The multi-view detection device for a display panel according to claim 7, wherein, the angle between the plane where the photosensitive chip is located and the plane where the display panel to be measured is located is 45°.

10. A detection system, wherein, it includes the multi-view detection device for a display panel according to any one of claims 1-9.

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