Display module, quality detection method of display module, and display device

Abstract

The application relates to a display module, a quality detection method of the display module and a display device. The display module comprises a display screen and a cover plate arranged on the display screen, wherein the cover plate comprises a substrate and an ink layer, the ink layer is arranged on one side of the substrate facing the display screen, and the inner edge of the ink layer defines a window area of the substrate; the display screen comprises a display area and a non-display area, the non-display area surrounds the periphery of the display area, a visible frame and a visible picture arranged in the visible frame are arranged in the display area, and the inner edge of the visible frame defines a visible picture area of the display screen. Through the above arrangement, the display module is lighted, whether the ink layer blocks the picture to be displayed is determined by judging whether the visible frame is located in the window area, that is, whether the visible frame can be directly seen, when the visible frame can be directly seen, it can be ensured that the picture to be displayed can be presented, that is, the visible picture area is not blocked by the ink layer, the quality detection difficulty of the display module is simplified, and the quality detection efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to display modules, quality testing methods for display modules, and display devices. Background Technology

[0002] With the development of display technology, display devices have been widely used in various industries, such as the automotive, industrial control, and medical fields. Among them, common display devices in the automotive field include in-vehicle displays, common display devices in the industrial control field include computer monitors, and common display devices in the medical field include physiological monitors. Among the various display devices, the display module is undoubtedly one of the most important components.

[0003] Currently, display modules include a display screen and a cover plate placed on the display screen. The display screen has a display area and a non-display area surrounding the display area. In order to effectively hide the non-display area of ​​the display screen, the ink layer in the cover plate covers the non-display area of ​​the display screen. However, after the ink layer covers the non-display area, even if the display module is turned on, it is difficult to determine whether there is a part of the image in the display area that is covered by the ink layer, which increases the difficulty of quality inspection. Summary of the Invention

[0004] Therefore, it is necessary to provide a display module, a quality inspection method for the display module, and a display device to address the issue of how to quickly determine whether the image in the display area is covered by the ink layer of the cover plate.

[0005] A display module includes a display screen and a cover plate disposed on the display screen, wherein:

[0006] The cover plate includes a substrate and an ink layer. The ink layer is disposed on the side of the substrate facing the display screen, and the inner edge of the ink layer defines the viewing area of ​​the substrate.

[0007] The display screen includes a display area and a non-display area. The non-display area surrounds the perimeter of the display area. The display area is provided with a viewing frame and a viewable image within the viewing frame. The inner edge of the viewing frame defines the viewable image area of ​​the display screen.

[0008] In one embodiment, the display module further includes an optical adhesive layer disposed between the cover plate and the display screen, the optical adhesive layer being used to connect the cover plate and the display screen.

[0009] In one embodiment, the optical adhesive layer, when projected onto the display screen, at least covers the viewing frame and the viewing area.

[0010] In one embodiment, the orthographic projection of the inner edge of the view frame onto the substrate lies within the view window area.

[0011] In one embodiment, the orthographic projection of the first center point of the visible screen area onto the substrate coincides with the second center point of the window area.

[0012] In one embodiment, the view frame is formed using DOT.

[0013] In one embodiment, the view frame is rectangular.

[0014] In one embodiment, the view frame is white.

[0015] The aforementioned display module, by setting a viewing frame within the display area, places the visible image within the viewing frame, using the inner edge of the viewing frame to define the visible image area of ​​the display screen. When it is necessary to check whether the visible image is fully displayed and whether there are any areas of the visible image obscured by the ink layer, the display module is turned on, and the ink layer is used to determine whether the visible frame is located within the viewing window area, i.e., whether the visible frame can be clearly seen. When the visible frame can be clearly seen, it can be guaranteed that the image to be displayed is fully presented, meaning that the visible image area is not obscured by the ink layer. This simplifies the quality inspection of the display module and greatly improves the efficiency of quality inspection.

[0016] This application also provides a quality inspection method for a display module based on any of the above embodiments, comprising the following steps:

[0017] S1. A display module is provided, the display module including a display screen and a cover plate covering the display screen, the cover plate including a substrate and an ink layer, the ink layer being disposed on the side of the substrate facing the display screen, the inner edge of the ink layer defining a viewing area of ​​the substrate, the display screen including a display area and a non-display area, the non-display area surrounding the periphery of the display area, the display area having a viewing frame and a viewing image disposed within the viewing frame, the inner edge of the viewing frame defining the viewing image area of ​​the display screen;

[0018] S2. Turn on the display module;

[0019] S3. Determine whether the inner edges of the view frame are all within the window area, and select the display module whose inner edges are all within the window area as a qualified product.

[0020] The above-mentioned quality inspection method for display modules involves obtaining the display module in step S1. The display module has a display screen and a cover plate. The display screen has a viewing frame within the display area, and a viewable image is displayed within the viewing frame. The cover plate includes a substrate and an ink layer defining the viewing window area on the substrate. In step S2, the display module is illuminated to facilitate subsequent observation of the position of the viewing frame. In step S3, it is determined whether the inner edges of the viewing frame are all located within the viewing window area, and display modules whose inner edges are all located within the viewing window area are selected as qualified products. When the inner edges of the viewing frame can be seen directly, it ensures that the viewable image within the viewing frame can be displayed. The entire inspection process is simple and convenient to operate, simplifying the quality inspection difficulty of display modules and greatly improving the quality inspection efficiency.

[0021] This application also provides a display device, including a display module as described in any of the above embodiments.

[0022] The aforementioned display device, by setting up a display module, includes a viewing frame within the display area. The visible image is placed within the viewing frame, and the inner edge of the viewing frame defines the visible image area of ​​the display screen. When it is necessary to check whether the visible image is fully displayed and whether there are any areas obscured by the ink layer, the display module is turned on. By determining whether the viewing frame is within the viewing area, i.e., whether the viewing frame is clearly visible, it can be determined whether the ink layer is obscuring the image to be displayed. When the viewing frame is clearly visible, it can be guaranteed that the image to be displayed is fully presented, meaning that the visible image area is not obscured by the ink layer. This simplifies the quality inspection of the display module and greatly improves quality inspection efficiency. Attached Figure Description

[0023] Figure 1 A schematic diagram of the display module provided in this application.

[0024] Figure 2 A schematic diagram of the display screen provided in this application.

[0025] Figure 3 A schematic diagram of the cover plate provided in this application.

[0026] Figure 4 An exploded view of the display module provided in this application.

[0027] Figure 5 A flowchart illustrating the quality inspection method for the display module provided in this application.

[0028] in:

[0029] 10. Display module;

[0030] 100. Display screen; 110. Display area; 111. Viewing frame; 112. Viewable screen area; 120. Non-display area;

[0031] 200, Cover plate; 210, Substrate; 211, Viewing area; 220, Ink layer;

[0032] 300. Optical adhesive layer. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] See Figure 1 , Figure 2 and Figure 3 , Figure 1 A schematic diagram of a display module 10 according to an embodiment of this application is shown. Figure 2 A schematic diagram of a display screen 100 according to an embodiment of this application is shown. Figure 3 A schematic diagram of a cover plate 200 in one embodiment of this application is shown. The display module 10 provided in one embodiment of this application includes a display screen 100 and a cover plate 200 covering the display screen 100, wherein:

[0040] The cover plate 200 includes a substrate 210 and an ink layer 220. The ink layer 220 is disposed on the side of the substrate 210 facing the display screen 100. The inner edge of the ink layer 220 defines the viewing area 211 of the substrate 210. In a specific configuration, the substrate 210 is transparent. The material of the substrate 210 can be glass or sapphire. The substrate 210 has high light transmittance.

[0041] The display screen 100 includes a display area 110 and a non-display area 120. The non-display area 120 surrounds the display area 110. A viewing frame 111 and a viewable screen within the viewing frame 111 are provided within the display area 110. The inner edge of the viewing frame 111 defines the viewable screen area 112 of the display screen 100. In a specific configuration, the orthographic projection of the window area 211 onto the display screen 100 is located within the display area 110. It should be noted that the display area 110 can be used to display information and provide an interactive interface for the user. Both the viewing frame 111 and the viewable screen area 112 defined by the viewing frame 111 within the display area 110 can serve as a user interface; that is, the viewing frame 111 can also be called a UI frame (User Interface).

[0042] It is easy to understand that the viewing area 211 needs to be compatible with the display area 110 of the display screen 100. That is, the user can view the information displayed in the display area 110 through the viewing area 211. In other words, the orthographic projection of the ink layer 220 on the display screen 100 needs to coincide with the non-display area 120, and the ink layer 220 cannot cover or obscure the display area 110, otherwise it will affect the user's viewing. However, it is currently difficult to determine whether the ink layer 220 obscures the image to be displayed in the display area 110 when it covers the non-display area 120. Based on this, this application sets a UI frame in the display area 110 to define the visible screen area 112. When the display module 10 is lit, it can be intuitively and quickly determined whether the UI frame is located in the window area 211, that is, whether the UI frame can be seen intuitively to determine whether the ink layer 220 is blocking the screen to be displayed. When the UI frame can be seen intuitively, it can be guaranteed that the screen to be displayed can be presented, that is, the visible screen area 112 is not blocked by the ink layer 220, which simplifies the quality inspection of the display module 10 and greatly improves the quality inspection efficiency.

[0043] The aforementioned display module 10, by setting a viewing frame 111 within the display area 110, places the visible image within the viewing frame 111, and uses the inner edge of the viewing frame 111 to define the visible image area 112 of the display screen 100. When it is necessary to check whether the visible image has been fully displayed and whether there are any areas of the visible image obscured by the ink layer 220, the display module 10 is turned on. By determining whether the viewing frame 111 is located within the viewing window area 211, that is, whether the viewing frame 111 can be clearly seen, it is determined whether the ink layer 220 is obscuring the image to be displayed. When the viewing frame 111 can be clearly seen, it can be guaranteed that the image to be displayed can be fully displayed, that is, the visible image area 112 is not obscured by the ink layer 220. This simplifies the quality inspection of the display module 10 and greatly improves the quality inspection efficiency.

[0044] Combination Figure 4 As shown, Figure 4This application provides an exploded view of the structure of a display module 10. In some embodiments, to facilitate the connection of the cover plate 200 and the display screen 100 as a single unit, a preferred embodiment further includes an optical adhesive layer 300. The optical adhesive layer 300 is disposed between the cover plate 200 and the display screen 100, and serves to connect the cover plate 200 and the display screen 100. Specifically, the optical adhesive layer 300 can be a solid optical adhesive or a solidified liquid optical adhesive. Optionally, the optical adhesive can be an OCR (Optical Clear Resin) liquid adhesive. In practice, optical adhesive needs to be applied to one side of the cover plate 200 and / or the display screen 100 before the cover plate 200 and the display screen 100 are bonded together. This arrangement facilitates the connection of the cover plate 200 and the display screen 100 as a single unit without affecting the display effect. To facilitate the fit between the cover plate 200 and the display screen 100, the cover plate 200 and the display screen 100 are generally set to the same size.

[0045] To ensure a better display effect for the display module 10, specifically, the optical adhesive layer 300, in its orthogonal projection onto the display screen 100, covers at least the viewing frame 111 and the viewing area 112. In specific configurations, the optical adhesive layer 300 typically covers the entire display screen 100. The optical adhesive has a high refractive index, giving it excellent light-guiding properties. Its high light transmittance also results in high light utilization by the optical adhesive layer 300. With the above configuration, the display module 10 includes a cover plate 200, an optical adhesive layer 300, and a display screen 100 arranged sequentially. The light-emitting surface of the display screen 100 reflects the light onto the cover plate 200 through the optical adhesive layer 300. When the display module 10 is lit, the ink layer 220 is used to determine whether the visible frame 111 is located within the viewing area 211, i.e., whether the visible frame 111 can be seen directly. When the visible frame 111 can be seen directly, it can be ensured that the image to be displayed can be presented, i.e., the viewing area 112 is not obstructed by the ink layer 220, and the display module 10 is a qualified product. At the same time, by setting the visible frame 111 within the display area 110, the image is set within the visible frame 111, reducing the image display area 110 of the display screen 100, making reasonable use of the space of the display screen 100, and saving power consumption.

[0046] To facilitate the selection of qualified display modules 10, in a preferred embodiment, the orthographic projection of the inner edge of the viewing frame 111 onto the substrate 210 is located within the viewing area 211. Specifically, the orthographic projection of the viewing frame 111 onto the substrate 210 is at a predetermined distance from the ink layer 220, preventing the non-display area 120 from appearing in the viewing area 211. It should be noted that during the bonding process between the cover plate 200 and the display screen 100, the ink layer 220 needs to cover the non-display area 120. If the ink layer 220 accidentally covers the display area 110 due to bonding techniques or process errors, it will affect the user's viewing experience. This application uses the inner edge of the viewing frame 111 to define the visible screen area 112. If the ink layer 220 partially obscures the display area 110 but does not extend beyond the inner edge of the viewing frame 111, it will not affect the user's viewing experience. Therefore, when determining whether the display module 10 is a qualified product, if the inner edge of the viewing frame 111 is within the window area 211, the display module 10 is a qualified product. Without a doubt, if the entire viewing frame 111 is within the window area 211, the display module 10 is also a qualified product.

[0047] To better present the visual image and prevent it from shifting when displayed in the viewing area 211, in a preferred embodiment, the orthographic projection of the first center point of the viewing area 112 onto the substrate 210 coincides with the second center point of the viewing area 211. Specifically, the orthographic projections of the viewing area 112 and the viewing frame 111 onto the substrate 210 are located within the viewing area 211. Based on this, by setting the orthographic projection of the first center point of the viewing area 211 onto the display screen 100 to coincide with the second center point of the viewing area 112, it is ensured that the visual image is appropriately presented in the viewing area 211.

[0048] To facilitate the formation of the viewport 111, in a preferred embodiment, the viewport 111 is formed using DOT (dot-of-view) technology. It should be noted that DOT refers to a pixel, and both the view and the viewport 111 are formed using DOT. A pixel can be considered an indivisible unit or element in the entire image, existing as a small square of a single color. Each bitmap image contains a certain number of pixels, which determine the size of the image displayed on the screen. In specific settings, the width of the viewport 111 can be set to 3 DOTs, but the width of the viewport 111 is not limited to this value and can be any value set according to actual requirements.

[0049] To facilitate better coordination between the view frame 111 and the window area 211, in a preferred embodiment, the view frame 111 is rectangular. In specific configurations, the view frame 111 can be rectangular, square, circular, elliptical, rhomboid, polygonal, etc., but its shape is not limited to the above structures; the view frame 111 can be any geometric shape. It should be noted that the outer edge of the window area 211 enclosed by the ink layer 220 is approximately rectangular, meaning the inner edge of the ink layer 220 is approximately rectangular. For aesthetic harmony and to ensure better coordination between the view frame 111 and the window area 211, the view frame 111 is preferably rectangular.

[0050] To make the viewport 111 more visually apparent, in a preferred embodiment, the viewport 111 is white. In specific settings, the color of the viewport 111 can be red, blue, green, etc., but the color of the viewport 111 is not limited to these colors; the color of the viewport 111 can be any color synthesized from the RGB three primary colors. It should be noted that the ink layer 220 is generally black, but to ensure visual clarity, the viewport 111 is preferably white.

[0051] Combination Figure 5 As shown, Figure 5 This application provides a flowchart of a quality inspection method for a display module 10. One embodiment of this application provides a quality inspection method for a display module 10, which includes the following steps:

[0052] Step S1: Provide a display module 10, which includes a display screen 100 and a cover plate 200 covering the display screen 100. The cover plate 200 includes a substrate 210 and an ink layer 220. The ink layer 220 is disposed on the side of the substrate 210 facing the display screen 100, and the inner edge of the ink layer 220 defines a viewing area 211 of the substrate 210. The display screen 100 includes a display area 110 and a non-display area 120. The non-display area 120 surrounds the periphery of the display area 110. The display module 10 is provided with a viewing frame 111 and a viewing screen within the viewing frame 111. The inner edge of the viewing frame 111 defines the viewing screen area 112 of the display screen 100. With the above configuration, the obtained display module 10 has a display screen 100 and a cover plate 200. The display screen 100 has a viewing frame 111 within the display area 110 and a viewing screen within the viewing frame 111. The cover plate 200 includes a substrate 210 and an ink layer 220 defining the viewing window area 211 on the substrate 210.

[0053] Step S2: Light up the display module 10. The above settings make it easier to observe the position of the view frame 111 later.

[0054] Step S3: Determine whether the inner edges of the view frame 111 are all within the window area 211, and select the display module 10 whose inner edges are all within the window area 211 as a qualified product. In specific settings, step S3 also includes the following steps: Step S31: Determine whether the inner edges of the view frame 111 are all within the window area 211; Step S32: Select the display module 10 whose inner edges are all within the window area 211 as a qualified product. It should be noted that as long as at least the inner edge of the view frame 111 is within the window frame, the display module 10 is considered a qualified product.

[0055] The quality inspection method for the aforementioned display module 10 involves obtaining the display module 10 through step S1. The display module 10 has a display screen 100 and a cover plate 200. The display screen 100 has a viewing frame 111 within a display area 110, and a viewing image is displayed within the viewing frame 111. The cover plate 200 includes a substrate 210 and an ink layer 220 defining the viewing area 211 on the substrate 210. Step S2 involves lighting up the display module 10 to facilitate subsequent observation of the position of the viewing frame 111. Step S3 involves determining whether the inner edges of the viewing frame 111 are all located within the viewing area 211, and selecting display modules 10 whose inner edges are all located within the viewing area 211 as qualified products. When the inner edges of the viewing frame 111 can be directly seen, it ensures that the viewing image within the viewing frame 111 can be displayed. The entire inspection process is simple and convenient to operate, simplifying the quality inspection of the display module 10 and greatly improving the quality inspection efficiency.

[0056] An embodiment of this application also provides a display device, which includes the display module 10 described in any of the above embodiments.

[0057] The aforementioned display device, by setting a display module 10, includes a viewing frame 111 within the display area 110. The visible image is placed within the viewing frame 111, and the inner edge of the viewing frame 111 defines the visible image area 112 of the display screen 100. When it is necessary to check whether the visible image is fully displayed and whether there are any areas obscured by the ink layer 220, the display module 10 is turned on. By determining whether the viewing frame 111 is located within the viewing window area 211, i.e., whether the viewing frame 111 can be clearly seen, it can be determined whether the ink layer 220 is obscuring the image to be displayed. When the viewing frame 111 can be clearly seen, it can be guaranteed that the image to be displayed can be presented, i.e., the visible image area 112 is not obscured by the ink layer 220. This simplifies the quality inspection of the display module 10 and greatly improves the quality inspection efficiency.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for quality inspection of a display module, characterized in that, Includes the following steps: S1. A display module is provided, the display module including a display screen and a cover plate covering the display screen, the cover plate including a substrate and an ink layer, the ink layer being disposed on the side of the substrate facing the display screen, the inner edge of the ink layer defining a viewing area of ​​the substrate, the display screen including a display area and a non-display area, the non-display area surrounding the periphery of the display area, the display area having a viewing frame and a viewing image disposed within the viewing frame, the inner edge of the viewing frame defining the viewing image area of ​​the display screen; S2. Turn on the display module; S3. Determine whether the inner edges of the view frame are all within the window area, and select the display module whose inner edges are all within the window area as a qualified product.

2. The quality inspection method for a display module according to claim 1, characterized in that, The display module also includes an optical adhesive layer, which is disposed between the cover plate and the display screen, and is used to connect the cover plate and the display screen.

3. The quality inspection method for a display module according to claim 2, characterized in that, The optical adhesive layer, when projected onto the display screen, at least covers the viewing frame and the viewing area.

4. The quality inspection method for a display module according to claim 1, characterized in that, The orthographic projection of the inner edge of the viewing frame onto the substrate lies within the viewing window area.

5. The quality inspection method for a display module according to claim 1, characterized in that, The orthographic projection of the first center point of the visible screen area onto the substrate coincides with the second center point of the window area.

6. The quality inspection method for a display module according to claim 1, characterized in that, The view frame is formed using DOT.

7. The quality inspection method for a display module according to claim 1, characterized in that, The view frame is rectangular.

8. The quality inspection method for a display module according to claim 1, characterized in that, The visible frame is white.

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