Optical auxiliary device and testing method

Abstract

The present application discloses an optical auxiliary device and a testing method, which are applied to display panels; the optical auxiliary device includes an auxiliary body and a first light source assembly fixed in the auxiliary body, the first end of the auxiliary body corresponds to the light incident surface of the target camera module, the second end of the auxiliary body corresponds to the surface of the component to be tested, the auxiliary light emitted by the first light source assembly is incident on the surface of the component to be tested through the second end of the auxiliary body, and the auxiliary light coincides with the central axis of the light incident surface of the target camera module; the present application fixes the first light source assembly emitting auxiliary light in the auxiliary body, so that the auxiliary light coincides with the central axis of the light incident surface of the target camera module, and at the same time utilizes the reflection principle of the auxiliary light to adjust the position of the target light source and the matching degree of the reflected light of the auxiliary light, thereby improving the debugging efficiency of the display panel roughness testing system.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to an optical auxiliary device and a testing method. Background Art

[0002] The surface roughness of existing display panels is usually measured by taking photos or videos with a camera. At the same time, a light source is used to illuminate the front, back or side of the object to be tested, so that the surface defects of the object to be tested are highlighted and captured by the camera.

[0003] Existing testing systems typically install the light source first, then adjust the angles of the camera and light source based on the images captured by the camera. This ensures that the light source illuminates the optimal position of the anomaly while the camera captures high-quality images. Consequently, this debugging process requires repeated adjustments of the camera and light source angles, as well as multiple camera captures, resulting in lengthy adjustments. Summary of the Invention

[0004] The present application provides an optical auxiliary device and a testing method to solve the technical problem of long debugging time of the existing display panel roughness testing system.

[0005] To solve the above problem, the technical solution provided by this application is as follows:

[0006] The present application provides an optical auxiliary device, applied to a display panel, comprising:

[0007] An auxiliary body, wherein the auxiliary body is fixedly connected to the target camera module, a first end of the auxiliary body corresponds to the light incident surface of the target camera module, and a second end of the auxiliary body corresponds to the surface of the component to be measured;

[0008] a first light source assembly, the first light source assembly being disposed in the auxiliary body, the first light source assembly being fixedly connected to the auxiliary body, and the auxiliary light emitted by the first light source assembly being incident on the surface of the component to be measured through the second end of the auxiliary body;

[0009] The auxiliary light coincides with a central axis of a light incident surface of the target camera module, and a direction from the first end of the auxiliary body to the second end of the auxiliary body is parallel to the auxiliary light.

[0010] In the optical auxiliary device of the present application, the auxiliary body includes a light guide channel having a first light guide surface and a second light guide surface, the first light guide surface corresponds to the light incident surface of the target camera module, and the second light guide surface corresponds to the surface of the component to be measured;

[0011] The first light source assembly is disposed in the light guide channel, and the auxiliary light emitted by the first light source assembly is incident on the surface of the component to be measured through the second light guide surface;

[0012] The first central axis of the light guide channel, the auxiliary light, and the second central axis of the light incident surface of the target camera module coincide with each other, and the first central axis and the direction from the first light guide surface to the second light guide surface are parallel.

[0013] In the optical auxiliary device of the present application, the first light source assembly includes a light source body and a connecting piece. The light source body emits the auxiliary light from a side close to the second light guide surface. The light source body is fixedly connected to the inner wall of the auxiliary body through the connecting piece.

[0014] In the optical auxiliary device of the present application, the auxiliary light includes laser or infrared light.

[0015] In the optical auxiliary device of the present application, the connecting member includes at least one connecting blade, and the connecting blade extends from the light source body to the inner wall of the auxiliary body.

[0016] In the optical auxiliary device of the present application, the area of ​​the first light-guiding surface of the auxiliary body is larger than the area of ​​the light-incident surface of the target camera module.

[0017] In the optical auxiliary device of the present application, the optical auxiliary device further comprises at least one retractable interface provided between the auxiliary body and the target camera module;

[0018] The shrinkage interface includes a first interface and a second interface, the first interface is connected to the first light-guiding surface of the auxiliary body, and the second interface is connected to the light-incident surface of the target camera module. The inscribed circle diameter of the first interface is equal to the circumscribed circle diameter of the first light-guiding surface, and the inscribed circle diameter of the second interface is equal to the circumscribed circle diameter of the light-incident surface of the target camera module.

[0019] In the optical auxiliary device of the present application, the auxiliary body includes a contraction section, and an area of ​​the contraction section close to the first light guiding surface is smaller than an area of ​​the contraction section close to the second light guiding surface.

[0020] In the optical auxiliary device of the present application, the cross-sectional profile of the light-collecting curved surface of the contraction section perpendicular to the first light-guiding surface or the second light-guiding surface is one of a parabola, a polynomial curve, a Bezier curve and a B-spline curve.

[0021] This application also proposes a testing method applied to a display panel, which includes:

[0022] Providing an optical auxiliary device as described above;

[0023] Fixedly connecting the lens of the target camera module and the first end of the auxiliary body in the light assist device so that the first light-guiding surface of the auxiliary body corresponds to the light-incident surface of the target camera module;

[0024] Utilizing the first light source assembly in the optical auxiliary device to emit auxiliary light, and allowing the auxiliary light to be incident on the surface of the component to be measured through the second light-guiding surface of the auxiliary body;

[0025] A second light source assembly is provided, and the position and light output angle of the second light source assembly are adjusted so that the auxiliary light is incident on the center of the light output surface of the second light source assembly through the light reflected by the component to be measured, and the light emitted by the second light source assembly and the auxiliary light overlap on the component to be measured.

[0026] Beneficial effect: The present application discloses an optical auxiliary device and a testing method, which are applied to a roughness testing system for a display panel; the optical auxiliary device comprises an auxiliary main body and a first light source assembly fixed in the auxiliary main body, the first end of the auxiliary main body corresponds to the light incident surface of the target camera module, the second end of the auxiliary main body corresponds to the surface of the component to be tested, the auxiliary light emitted by the first light source assembly is incident on the surface of the component to be tested through the second end of the auxiliary main body, and the auxiliary light and the central axis of the light incident surface of the target camera module coincide with each other; the present application fixes the first light source assembly emitting auxiliary light in the auxiliary main body so that the auxiliary light and the central axis of the light incident surface of the target camera module coincide with each other, determines the shooting angle of the target camera module according to the reflected light after the auxiliary light passes through the component to be tested, and simultaneously utilizes the reflection principle of the auxiliary light to adjust the position of the target light source and the matching degree of the reflected light of the auxiliary light, thereby improving the debugging efficiency of the roughness testing system for the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0028] Figure 1 This is a structural diagram of a roughness testing system for a display panel in the prior art;

[0029] Figure 2 This is a first structural diagram of the optical auxiliary device of this application;

[0030] Figure 3 This is a second structural diagram of the optical auxiliary device of this application;

[0031] Figure 4 for Figure 2 The main structural diagram;

[0032] Figure 5 This is a third structural diagram of the optical auxiliary device of this application;

[0033] Figure 6 This is a step diagram of the testing method using an optical auxiliary device in this application. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0035] In existing display panel roughness testing systems, when most of the light is reflected into the camera module lens, the image captured by the camera module will show that the raised or abnormal part is darker, while other areas are brighter. This is called bright field. On the other hand, when less light is reflected into the camera module lens, diffuse reflection may occur when the light passes through the abnormal part, making the abnormal part brighter and other areas darker. This is called dark field. Figure 1 In order to better obtain data on abnormal parts, the camera module needs to obtain dark field images. However, the method of obtaining dark field images requires repeated adjustment of the angles of the camera and light source, as well as multiple camera captures, which takes a long time to adjust.

[0036] See also Figure 2 The present application provides an optical auxiliary device 100 for a display panel. The optical auxiliary device 100 is mainly used in a roughness testing system for a display panel. The optical auxiliary device 100 may include an auxiliary body 10 and a first light source assembly 20.

[0037] In this embodiment, the auxiliary body 10 is fixedly connected to the target camera module 30 , and the first end of the auxiliary body 10 corresponds to the light incident surface of the target camera module 30 , and the second end of the auxiliary body 10 corresponds to the surface of the component to be measured 40 .

[0038] In this embodiment, the first light source assembly 20 is disposed in the auxiliary body 10, and the first light source assembly 20 and the auxiliary body 10 are fixedly connected, and the auxiliary light emitted by the first light source assembly 20 is incident on the surface of the component to be measured 40 through the second end of the auxiliary body 10.

[0039] In this embodiment, the auxiliary light coincides with the central axis of the light incident surface of the target camera module 30 , and the direction from the first end of the auxiliary body 10 to the second end of the auxiliary body 10 is parallel to the auxiliary light.

[0040] It should be noted that the auxiliary light and the central axis of the light incident surface of the target camera module 30 are Figure 4 The central axis O1O2 coincides.

[0041] The present application fixes the first light source assembly 20 that emits auxiliary light in the auxiliary main body 10 so that the auxiliary light and the central axis of the light incident surface 310 of the target camera module 30 coincide with each other, and determines the shooting angle of the target camera module 30 based on the reflected light of the auxiliary light after passing through the component to be tested 40. At the same time, the reflection principle of the auxiliary light is utilized to adjust the matching degree between the position of the target light source and the reflected light of the auxiliary light, thereby improving the debugging efficiency of the display panel roughness test system.

[0042] It should be noted that the auxiliary body 10 can be a hollow cylinder, a hollow cuboid, or other hollow cubes, for example Figure 2 and Figure 4 A hollow cylinder as shown; or Figure 3 As shown, the auxiliary body 10 is a clamping device. As long as the auxiliary light of the first light source assembly 20 and the central axis of the light incident surface 310 of the target camera module 30 coincide, the following embodiments are based on Figure 2 The structure of is used as an example to illustrate.

[0043] It should be noted that the component to be tested 40 may be a display screen for display, or an uncut display panel, or other flat plates such as a substrate, or a component requiring surface flatness.

[0044] It should be noted that the optical auxiliary device 100 and the testing method of the present application are not limited to applications related to roughness testing of display panels, but can also be used for appearance testing, lighting testing, or other testing items of display panels.

[0045] The technical solution of this application is now described in conjunction with specific embodiments.

[0046] See also Figure 2 and Figure 4 The auxiliary body 10 may include a light guiding channel 130 having a first light guiding surface 110 and a second light guiding surface 120, wherein the first light guiding surface 110 corresponds to the light incident surface 310 of the target camera module 30, and the second light guiding surface 120 corresponds to the surface of the component to be measured 40; the first light source assembly 20 may be arranged in the light guiding channel 130, and the auxiliary light emitted by the first light source assembly 20 is incident on the surface of the component to be measured 40 through the second light guiding surface 120.

[0047] In this embodiment, the first central axis of the light guide channel 130, the auxiliary light, and the second central axis of the light incident surface 310 of the target camera module 30 coincide with each other, that is, the above three lines coincide with each other. Figure 4 The first central axis O1O2 coincides with the first central axis, and the first central axis is parallel to the direction from the first light guiding surface 110 to the second light guiding surface 120.

[0048] In this embodiment, the auxiliary body 10 is a hollow cylinder, and the central axis of the hollow cylinder coincides with the first central axis of the light-guiding channel 130, that is, the first light source assembly 20 is fixed on the first central axis of the hollow cylinder. Since the target camera module 30 is fixed at the first end of the auxiliary body 10, that is, it is fixedly connected to the structure on the side of the first light-guiding surface 110 of the auxiliary body 10, since the first light-guiding surface 110 corresponds to the light-entering surface 310 of the target camera module 30, and the second central axis of the light-entering surface 310 of the target camera module 30 coincides with the auxiliary light, that is, the emission angle of the auxiliary light is the shooting angle of the target camera module 30, the contact point between the auxiliary light and the component to be measured 40 is the shooting point of the target camera module 30, and the adjustment of the contact point between the auxiliary light and the component to be measured 40 is the adjustment of the shooting angle of the target camera module 30.

[0049] In the optical auxiliary device 100 of the present application, please refer to Figure 2 and Figure 4 The first light source assembly 20 includes a light source body 210 and a connecting member 220. The light source body 210 emits the auxiliary light from a side close to the second light guide surface 120. The light source body 210 is fixedly connected to the inner wall of the auxiliary body 10 through the connecting member 220.

[0050] In this embodiment, the connecting member 220 includes at least one connecting blade 221, and the connecting blade 221 extends from the light source body 210 to the inner wall of the auxiliary body 10. The number of the connecting blades 221 is not limited in this application, as long as the central axis of the light source body 210 and the central axis of the light guide channel 130 are coincident; for example Figure 2 In the structure, the number of the connecting blades 221 is 4, and the angle between two adjacent connecting blades 221 is 90°.

[0051] In this embodiment, the auxiliary light may be laser or infrared light.

[0052] In the optical auxiliary device 100 of the present application, please refer to Figure 5 , the area of ​​the first light guiding surface 110 of the auxiliary body 10 is larger than the area of ​​the light incident surface 310 of the target camera module 30 .

[0053] In this embodiment, since different target camera modules 30 have lenses of different sizes, if the area of ​​the first light guide surface 110 is too small, it will not be able to adapt to large-sized lenses. Therefore, in the initial design, the application makes the area of ​​the first light guide surface 110 of the auxiliary body 10 larger than the area of ​​the light incident surface 310 of the target camera module 30, for example Figure 2 The hollow cylinder in the first light guiding surface 110 is a circle, that is, the diameter of the inscribed circle of the first light guiding surface 110 can be larger than the diameter of the circumscribed circle of the lens of the target camera module 30.

[0054] In the optical auxiliary device 100 of the present application, please refer to Figure 5 The optical auxiliary device 100 further includes at least one shrinkage interface 50 disposed between the auxiliary body 10 and the target camera module 30 .

[0055] In this embodiment, the retractable interface 50 includes a first interface 510 and a second interface 520, the first interface 510 is docked with the first light-guiding surface 110 of the auxiliary body 10, and the second interface 520 is docked with the light-incident surface 310 of the target camera module 30, the inscribed circle diameter of the first interface 510 is equal to the circumscribed circle diameter of the first light-guiding surface 110, and the inscribed circle diameter of the second interface 520 is equal to the circumscribed circle diameter of the light-incident surface 310 of the target camera module 30.

[0056] In this embodiment, the setting of the retractable interface 50 can enable the auxiliary body 10 of the present application to adapt to the lenses of target camera modules 30 of different sizes, and the size of the second interface 520 of the auxiliary body 10 can be adjusted according to different target camera modules 30.

[0057] In the optical auxiliary device 100 of the present application, please refer to Figure 5 The auxiliary body 10 includes a contraction section 60, and the area of ​​the contraction section 60 close to the first light guiding surface 110 is smaller than the area of ​​the contraction section 60 close to the second light guiding surface 120, that is, the area of ​​the first light guiding surface 110 is smaller than the area of ​​the second light guiding surface 120.

[0058] In this embodiment, the contraction section 60 can be arranged close to the second light guiding surface 120, one end of the contraction section 60 can be the second light guiding surface 120, and the other end of the contraction section 60 can be any cross-section in the auxiliary body 10, as long as the area of ​​the second light guiding surface 120 is larger than the first light guiding surface 110.

[0059] In this embodiment, since the second light-guiding surface 120 is arranged close to the component to be measured 40, the light reflected by the target light source after irradiating the component to be measured 40 will enter the lens of the target camera module 30 through the light-guiding channel 130 of the auxiliary body 10. Therefore, if the second light-guiding surface 120 of the auxiliary body 10 is large enough, it can receive more reflected light; at the same time, the setting of the contraction section 60 has a certain focusing effect on the light entering the light-guiding channel 130, so that the lens of the target camera module 30 can receive more small-angle light, thereby improving the imaging quality of the target camera module 30.

[0060] In this embodiment, the cross-sectional profile of the light-collecting curved surface of the contraction section 60 perpendicular to the first light guiding surface 110 or the second light guiding surface 120 is one of a parabola, a polynomial curve, a Bezier curve, and a B-spline curve.

[0061] See also Figure 3 and Figure 6 , this application also proposes a testing method, which includes:

[0062] S10, providing the optical auxiliary device 100;

[0063] S20, fixing the lens of the target camera module 30 to the first end of the auxiliary body 10 in the light assist device so that the first light guiding surface 110 of the auxiliary body 10 corresponds to the light incident surface 310 of the target camera module 30;

[0064] S30, using the first light source assembly 20 in the optical auxiliary device 100 to emit auxiliary light, and allowing the auxiliary light to be incident on the surface of the component to be measured 40 through the second light guide surface 120 of the auxiliary body 10;

[0065] S40. Provide a second light source assembly 70, and adjust the position and light output angle of the second light source assembly 70 so that the auxiliary light is reflected by the component to be measured 40 and is incident on the center of the light output surface of the second light source assembly 70, and the light emitted by the second light source assembly 70 and the auxiliary light overlap on the component to be measured 40.

[0066] It should be noted that the above test method is mainly used to measure the roughness of display panels.

[0067] In the present application, a first light source assembly 20 capable of emitting auxiliary light and a target camera module 30 are assembled together, and at the same time, the auxiliary light and the central axis of the lens of the target camera module 30 coincide, that is, the emission angle of the auxiliary light is the shooting angle of the target camera module 30, and the contact point between the auxiliary light and the component to be measured 40 is the shooting point of the target camera module 30. The adjustment of the contact point between the auxiliary light and the component to be measured 40 is the adjustment of the shooting angle of the target camera module 30.

[0068] Secondly, based on the reversible principle of the optical path, according to whether the light emitted by the second light source assembly 70 and the auxiliary light overlap on the component to be tested 40 and whether the auxiliary light reflected by the component to be tested 40 falls on the center of the light-emitting surface of the second light source assembly 70, that is, based on the above two points, the position and light-emitting angle of the second light source assembly 70 are adjusted so that the camera module can obtain dark field images faster, reducing the number of debugging times of the target camera module 30 and the second light source assembly 70, and improving the debugging efficiency of the display panel roughness test system.

[0069] Finally, the camera module in the prior art needs to be irradiated for a long time by the light emitted by the second light source assembly 70 after being reflected, which may cause damage to the target camera module 30. The present application only needs to determine whether the light emitted by the second light source assembly 70 and the auxiliary light overlap on the component to be tested 40 and whether the auxiliary light reflected by the component to be tested 40 falls on the center of the light-emitting surface of the second light source assembly 70, thereby reducing the risk of damage to the target camera module 30.

[0070] In this embodiment, the second light source assembly 70 may be an LED lamp.

[0071] The present application discloses an optical auxiliary device and a testing method, which are applied to a roughness testing system for a display panel; the optical auxiliary device comprises an auxiliary main body and a first light source assembly fixed in the auxiliary main body, the first end of the auxiliary main body corresponds to the light incident surface of a target camera module, the second end of the auxiliary main body corresponds to the surface of a component to be tested, the auxiliary light emitted by the first light source assembly is incident on the surface of the component to be tested through the second end of the auxiliary main body, and the auxiliary light coincides with the central axis of the light incident surface of the target camera module; the present application fixes the first light source assembly emitting auxiliary light in the auxiliary main body so that the auxiliary light coincides with the central axis of the light incident surface of the target camera module, determines the shooting angle of the target camera module according to the reflected light of the auxiliary light after passing through the component to be tested, and simultaneously utilizes the reflection principle of the auxiliary light to adjust the position of the target light source and the matching degree of the reflected light of the auxiliary light, thereby improving the debugging efficiency of the testing system for the roughness of the display panel.

[0072] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0073] The above is a detailed introduction to an optical auxiliary device and testing method provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical auxiliary device, applied to a display panel, characterized in that: include: An auxiliary body, wherein the auxiliary body is fixedly connected to the target camera module, a first end of the auxiliary body corresponds to the light incident surface of the target camera module, and a second end of the auxiliary body corresponds to the surface of the component to be measured; a first light source assembly, the first light source assembly being disposed in the auxiliary body, the first light source assembly being fixedly connected to the auxiliary body, and the auxiliary light emitted by the first light source assembly being incident on the surface of the component to be measured through the second end of the auxiliary body; The auxiliary light coincides with a central axis of a light incident surface of the target camera module, and a direction from the first end of the auxiliary body to the second end of the auxiliary body is parallel to the auxiliary light.

2. The optical assistive device according to claim 1, wherein: The auxiliary body includes a light guiding channel having a first light guiding surface and a second light guiding surface, wherein the first light guiding surface corresponds to the light incident surface of the target camera module, and the second light guiding surface corresponds to the surface of the component to be measured; The first light source assembly is disposed in the light guide channel, and the auxiliary light emitted by the first light source assembly is incident on the surface of the component to be measured through the second light guide surface; The first central axis of the light guide channel, the auxiliary light, and the second central axis of the light incident surface of the target camera module coincide with each other, and the first central axis and the direction from the first light guide surface to the second light guide surface are parallel.

3. The optical assistive device according to claim 2, wherein: The first light source assembly includes a light source body and a connecting piece. The light source body emits the auxiliary light from a side close to the second light guide surface. The light source body is fixedly connected to the inner wall of the auxiliary body through the connecting piece.

4. The optical assistive device according to claim 3, wherein: The auxiliary light includes laser or infrared light.

5. The optical assistive device according to claim 3, wherein: The connecting member includes at least one connecting blade extending from the light source body to an inner wall of the auxiliary body.

6. The optical assistive device according to claim 2, wherein: An area of ​​the first light-guiding surface of the auxiliary body is larger than an area of ​​a light-incident surface of the target camera module.

7. The optical assistive device according to claim 6, wherein: The optical auxiliary device further includes at least one retractable interface disposed between the auxiliary body and the target camera module; The shrinkage interface includes a first interface and a second interface, the first interface is connected to the first light-guiding surface of the auxiliary body, and the second interface is connected to the light-incident surface of the target camera module. The inscribed circle diameter of the first interface is equal to the circumscribed circle diameter of the first light-guiding surface, and the inscribed circle diameter of the second interface is equal to the circumscribed circle diameter of the light-incident surface of the target camera module.

8. The optical assistive device according to claim 2, wherein: The auxiliary body includes a contraction section, and an area of ​​the contraction section close to the first light guiding surface is smaller than an area of ​​the contraction section close to the second light guiding surface.

9. The optical assistive device according to claim 8, wherein: A cross-sectional profile of the light-collecting curved surface of the contraction section perpendicular to the first light-guiding surface or the second light-guiding surface is one of a parabola, a polynomial curve, a Bezier curve, and a B-spline curve.

10. A testing method, applied to a display panel, characterized in that: include: Providing an optical auxiliary device according to any one of claims 1 to 9; Fixedly connecting the lens of the target camera module and the first end of the auxiliary body in the optical auxiliary device so that the first light-guiding surface of the auxiliary body corresponds to the light-incident surface of the target camera module; Utilizing the first light source assembly in the optical auxiliary device to emit auxiliary light, and allowing the auxiliary light to be incident on the surface of the component to be measured through the second light-guiding surface of the auxiliary body; A second light source assembly is provided, and the position and light output angle of the second light source assembly are adjusted so that the auxiliary light is incident on the center of the light output surface of the second light source assembly through the light reflected by the component to be measured, and the light emitted by the second light source assembly and the auxiliary light overlap on the component to be measured.

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