Display module and display device

Abstract

This application provides a display module and display device. The display module includes a display screen, a bracket, and a transparent cover. The display screen includes a display panel and a flexible circuit board. The flexible circuit board extends from the cable exit edge of the display panel. The display panel is disposed within a receiving compartment of the bracket. The receiving compartment includes a first inner sidewall corresponding to the cable exit edge, a second inner sidewall adjacent to the first inner sidewall, and a third inner sidewall opposite to the first inner sidewall. At least one positioning rib protrudes from the second inner sidewall. The transparent cover is fixedly connected to the side of the display panel facing away from the receiving compartment. The transparent cover includes a first positioning edge corresponding to the cable exit edge, a second positioning edge adjacent to the first positioning edge, and a third positioning edge opposite to the first positioning edge. The first positioning edge abuts against the positioning rib, the second positioning edge abuts against the second inner sidewall, and the third positioning edge abuts against the third inner sidewall. This application provides a display module and display device that can improve the positioning accuracy of the display module.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a display module and display device. Background Technology

[0002] In head-mounted display devices such as VR (Virtual Reality) devices and AR (Augmented Reality) devices, the display module and optical module work together. If there is an error in the positioning of the micro-screen in the display module, the display error will be amplified after being refracted by the lens in the optical module. Therefore, VR and AR devices have high requirements for the positioning of the micro-screen.

[0003] In related technologies, a display module may include a display screen and a bracket. The display panel of the display screen can be connected to the circuit board through a flexible printed circuit board (FPC). On the FPC output side of the display panel, the presence of the FPC will cause the display panel to be unable to achieve precise positioning with the bracket. Summary of the Invention

[0004] This application provides a display module and display device that can improve the positioning accuracy of the display module.

[0005] One embodiment of this application provides a display module, including: a display screen, a bracket, and a transparent cover plate; the display screen includes a display panel and a flexible circuit board, the flexible circuit board having a wire exiting from the wire exiting edge of the display panel; the bracket includes a receiving compartment, the display panel being disposed within the receiving compartment; the receiving compartment includes a first inner sidewall corresponding to the wire exiting edge, a second inner sidewall adjacent to the first inner sidewall, and a third inner sidewall opposite to the first inner sidewall; at least one positioning rib is protruding from the second inner sidewall; the transparent cover plate is fixedly connected to the side of the display panel facing away from the receiving compartment; the transparent cover plate includes a first positioning edge corresponding to the wire exiting edge, a second positioning edge adjacent to the first positioning edge, and a third positioning edge opposite to the first positioning edge; the first positioning edge abuts against the positioning rib, the second positioning edge abuts against the second inner sidewall, and the third positioning edge abuts against the third inner sidewall.

[0006] This application provides a display module. By adding a transparent cover plate and fixing it to the surface of the display screen, the maximum outline of the display screen can be changed using the transparent cover plate. At the same time, protruding positioning ribs are designed in the accommodating compartment of the bracket, so that the FPC cable outlet side of the display screen is positioned by the cooperation of the transparent cover plate and the positioning ribs. The remaining three sides are positioned by the interference fit between the display screen and the inner sidewall of the accommodating compartment, thereby achieving four-sided positioning as a whole and achieving the effect of precise positioning of the display screen.

[0007] In one possible implementation, the display module further includes a light-shielding sheet with a window opening inside that corresponds to the display panel. The bracket also includes a mating plane around the accommodating compartment, with the accommodating compartment recessed inward relative to the mating plane. The light-shielding sheet is mated to the mating plane and the transparent cover plate.

[0008] On the one hand, the light shield can block light from non-display areas, preventing external light from affecting the display effect of the display panel; on the other hand, the light shield can isolate the front light-emitting surface and the back of the display panel, preventing dust from entering the front light-emitting surface of the display panel from the back side, thus achieving a good dustproof effect.

[0009] In one possible implementation, the surface of the transparent cover facing away from the display panel is flush with the bonding plane or located on the side of the bonding plane facing the receiving compartment.

[0010] The transparent cover also serves to provide a bonding area for the light-shielding sheet. Setting the surface of the transparent cover flush with the bonding plane or located on the side of the bonding plane facing the accommodating compartment helps to provide a flat bonding surface for the light-shielding sheet and improves the reliability of the bonding.

[0011] In one possible implementation, the display screen further includes a chip that protrudes from the display panel, and a transparent cover plate is fixedly connected to the display panel, the thickness of which is greater than or equal to the thickness of the chip protruding from the display panel.

[0012] By adding a transparent cover plate with a certain thickness, the chip no longer protrudes relative to the transparent cover plate. The transparent cover plate and the bonding surface can provide a flat bonding surface for the light shield, so that the light shield can be reliably attached and the light shielding and dustproofing effects can be improved.

[0013] The bracket also includes a cable outlet, which is located inside the housing, and the flexible circuit board extends out of the housing from the cable outlet.

[0014] In one possible implementation, the outlet is located on the bottom wall of the housing, and the flexible circuit board extends out of the housing from the outlet and is bent and attached tightly to the back of the bottom wall of the housing.

[0015] The flexible circuit board does not extend directly from the side, but from the cable outlet on the back of the bracket. The flexible circuit board occupies a small volume, which is conducive to the miniaturization design of the overall display module.

[0016] In one possible implementation, a connector is provided at the end of the flexible circuit board for connecting to the circuit board.

[0017] After the flexible circuit board extends from the cable outlet, it is bent 180° and attached to the back of the bracket. The end of the flexible circuit board can be connected to the circuit board through a connector. The back of the bracket provides a support surface for the connector. The connector and the circuit board are snapped together and pressed tightly, which helps to improve the reliability and stability of the connection.

[0018] In one possible implementation, the display module further includes a dustproof component that covers the cable outlet.

[0019] The flexible circuit board does not extend directly from the side, but from the cable outlet on the back of the bracket. This allows the dustproof material to better adhere to and cover the cable outlet, thus improving the dustproof effect.

[0020] In one possible implementation, the dustproof component includes foam.

[0021] The dustproof component can be made of foam or similar materials. It is elastic and fills the outlet to prevent dust from entering without damaging the flexible circuit board.

[0022] In one possible implementation, the width of the lead wires of the flexible circuit board is greater than or equal to the width of the display panel, and the width of the transparent cover is greater than the width of the lead wires of the flexible circuit board.

[0023] The flexible circuit board has a wide lead-out width, which is beneficial for pin arrangement. By setting the width of the transparent cover plate to be greater than the lead-out width of the flexible circuit board, the portion of the transparent cover plate that extends beyond the width of the flexible circuit board can cooperate with the positioning ribs to achieve positioning.

[0024] In one possible implementation, a positioning rib is provided protruding from each of the two second inner sidewalls, and the two ends of the first positioning edge abut against the two positioning ribs respectively.

[0025] The flexible circuit board extends from the top of the display panel, with the outlet located at the top of the storage compartment. Positioning ribs protrude from the left and right walls of the storage compartment. The top edge of the transparent cover abuts against the positioning ribs, and the left, right, and bottom edges of the transparent cover abut against the inner walls of the storage compartment.

[0026] The top edge of the transparent cover abuts against the positioning rib. The left and right sides of the transparent cover abut against the left and right walls of the storage compartment, respectively. The bottom edge of the transparent cover abuts against the bottom wall of the storage compartment. In other words, the combination of the added transparent cover and the positioning rib is used to achieve positioning in the upper direction. Positioning in the left, right, and bottom directions is achieved by the three sides of the storage compartment.

[0027] In one possible implementation, the thickness of the transparent cover is 0.6mm-1.2mm.

[0028] The thickness range of the transparent cover can be set to achieve the effects of structural strength, good fit of the light-shielding sheet, no impact on imaging effect, and no increase in overall size.

[0029] In one possible implementation, the transparent cover is bonded to the display panel using optical adhesive.

[0030] Optical adhesive can ensure a reliable fit between the transparent cover and the front of the display panel, and it also ensures that the transparent cover does not affect the display quality of the display panel.

[0031] Another embodiment of this application provides a display device, including the display module described above.

[0032] Display devices employing the aforementioned display module can improve the positioning accuracy of the display screen, thereby avoiding image shift and enhancing the display effect. This display device can be applied to head-mounted display devices, such as AR and VR devices, as well as to products with small-sized displays, such as watches and wristbands.

[0033] In one possible implementation, the display device is a head-mounted display device, which includes an optical module and a display module connected together. The optical module is used to magnify the image displayed by the display module.

[0034] If there is an error in the positioning of the micro-screen within the display module, the display error will be amplified after refraction by the lens within the optical module. The display module provided in this application embodiment can improve the positioning accuracy of the display screen, so that the display image of the head-mounted display device will not shift due to inaccurate positioning.

[0035] In one possible implementation, the head-mounted display device includes a virtual reality (VR) device, with an optical module attached to a support for the display module and located in a compartment with the opening facing one side.

[0036] The display screen in the display module is precisely positioned relative to the bracket, and the bracket and optical module are bonded and fixed, thereby ensuring the overall positioning accuracy of the VR device, avoiding problems such as blurry images or missing content, and improving the display effect.

[0037] This application provides a display module and a display device. By adding a transparent cover plate to the display panel and adding positioning ribs in the accommodating compartment of the bracket, the outline of the transparent cover plate cooperates with the accommodating compartment and the positioning ribs, thereby achieving precise positioning and fixing of the display panel and improving the display effect. Attached Figure Description

[0038] Figure 1a This is a schematic diagram of the structure of a VR device provided in an embodiment of this application;

[0039] Figure 1b This is a schematic diagram of the structure of an AR device provided in one embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the overall structure of an optical module and a display module provided in an embodiment of this application;

[0041] Figure 3 This is an exploded view of the optical module and display module provided in an embodiment of this application;

[0042] Figure 4 This is an exploded view of a display module provided in one embodiment of this application;

[0043] Figure 5 This is a schematic diagram of the structure of the display screen and bracket provided in one embodiment of this application;

[0044] Figure 6 This is a schematic diagram of the display screen, bracket, and transparent cover provided in an embodiment of this application.

[0045] Figure 7 A schematic diagram of the structure of the display screen, bracket, transparent cover plate and light shield provided in an embodiment of this application;

[0046] Figure 8 This is a side cross-sectional view of a display module provided in an embodiment of this application;

[0047] Figure 9 A schematic diagram of the display screen provided for related technologies.

[0048] Explanation of reference numerals in the attached figures:

[0049] 100a-VR device; 100b-AR device; 11-Wearable component; 12-Device body; 13-Optical waveguide; 200-Optical module; 300-Display module; 31-Display screen; 311-Display panel; 312-Chip; 313-Flexible circuit board; 314-Connector; 32-Bracket; 321-Accommodation compartment; 321a-First inner sidewall; 321b-Second inner sidewall; 321c-Third inner sidewall; 322-Positioning rib; 323-Cable outlet; 324-Fitting plane; 33-Transparent cover; 33a-First positioning edge; 33b-Second positioning edge; 33c-Third positioning edge; 34-Light shield; 341-Viewing window opening; 35-Dustproof component. Detailed Implementation

[0050] This application provides a display device, which may include a head-mounted display device, such as a virtual reality (VR) device and an augmented reality (AR) device. The display device may also include devices with micro-displays, such as watches and bracelets.

[0051] VR refers to the projection of digital content onto the human eye through an optical imaging system, making users feel as if they are in a virtual world, achieving an immersive virtual experience. With the continuous development of VR technology, users will be able to see images in the virtual world using head-mounted displays.

[0052] AR (Augmented Reality) is a technology that calculates the position and angle of camera images in real time and adds corresponding images, videos, and 3D models. An AR head-mounted display device is a wearable device that implements AR technology and can be worn on the human head for display. It uses computer technology to overlay virtual information onto the real world, allowing the real environment and virtual objects to be superimposed on the same screen in real time, achieving mutual supplementation of the two types of information. This is then displayed in front of the user through helmets, glasses, and other devices, enhancing the user's sense of reality.

[0053] VR or AR devices typically consist of two components: a display module and an optical module. These two modules work together to project the image displayed on the display module onto the viewer's eyes. The display module and optical module together determine the display quality and cost of the VR or AR device. The display screen within the display module needs to be suitable for small-sized displays, requiring high performance in terms of resolution, refresh rate, and weight. Display screens can be, for example, silicon-based OLED (Organic Light-Emitting Diode) screens, Micro-LED screens, or other types of screens.

[0054] The development cycle for silicon-based OLED and other types of screens used as displays is long and expensive. Therefore, in practical applications, VR or AR devices are generally designed based on currently mass-produced screens. Silicon-based OLED screens and similar types of screens have a high number of pins in their circuitry. To accommodate this pin arrangement, the width of the FPC (Flexible Printed Circuit board) traces can be the same as or even greater than the width of the display panel. This reduces the structural strength of the FPC, making it more susceptible to damage under stress. Consequently, when the display panel is mounted in the bracket of a VR or AR device, the FPC traces cannot be properly positioned and installed in the bracket.

[0055] It's easy to understand that if there's an error in the positioning of the micro-screen within the display module, the display error will be amplified after refraction by the lenses within the optical module. Therefore, VR and AR devices have high requirements for the positioning of the micro-screen. If the FPC output side of the micro-screen cannot be positioned and installed with the bracket, it will result in low positioning accuracy of the display panel in VR and AR devices, thus greatly affecting the display effect.

[0056] In related technologies, the width of the display panel can be increased so that the width of the display panel on the FPC output side is greater than the width of the FPC. The extra width can be used to position the display panel on this side. However, when the display area of ​​the display panel can already meet the field of view requirements of VR or AR devices, increasing the width of the display panel means re-customizing the display panel, which will cause a significant increase in cost.

[0057] In another related technology, the display panel is installed in the housing of the bracket. The housing does not have a positioning structure, or the housing has positioning structures on the three sides of the display panel other than the FPC cable exit side. The display panel is fixed to the housing of the bracket by methods such as adhesive dispensing, i.e., positioning and fixing are achieved through adhesive dispensing. However, the positioning accuracy of adhesive dispensing is limited, especially for the FPC cable exit side of the display panel. If precise positioning is not achieved, large tolerances can easily occur.

[0058] To address the aforementioned issues, this application provides a display module and a display device. By adding a transparent cover plate over the display panel and adding positioning ribs within the accommodating compartment of the bracket, the precise positioning and fixing of the display panel can be achieved by utilizing the contour of the transparent cover plate in conjunction with the accommodating compartment and the positioning ribs.

[0059] The display module and display device provided in this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] Figure 1a This is a schematic diagram of the structure of a VR device provided in one embodiment of this application. (Reference) Figure 1a As shown, the VR device 100a may include a wearable part 11 and a device body 12. When a user wears the VR device 100a, the device body 12 is located in front of the user's eyes to provide a display screen for the user's eyes, while the wearable part 11 is used to fix it on the user's head or ears to achieve reliable wearing of the VR device 100a.

[0061] For example, the VR device 100a can be in the form of glasses as shown in the figure. In this case, the main body 12 of the device can include a frame that is mounted above the user's nose and in front of the user's eyes, and the wearing part 11 can be the temples that are mounted on the user's ears. The VR device 100a can also be in the form of a helmet, etc. The main body 12 of the device can be an eye mask that covers the user's eyes, and the wearing part 11 can be a helmet that covers the user's head.

[0062] The main body 12 of the device contains an optical module 200 and a display module 300. The optical module 200 and display module 300 control the light within the user's field of vision. The display module 300 is located on the side of the optical module 200 furthest from the user's eye. The display module 300 may include a display panel and is used to display real images. The optical module 200 may include optical lens groups and reflectors. Light emitted from the display module 300 enters the user's eye after refraction or reflection by the optical module 200. The optical module 200 can magnify a very close screen image into a magnified virtual image within the user's visible range, allowing the user to clearly see the content on the screen. One optical module 200 and one display module 300 constitute an imaging system. There can be two imaging systems, corresponding to the user's left and right eyes respectively. The two imaging systems can achieve stereoscopic imaging through interleaved display, image swapping, or parallax fusion.

[0063] Figure 1b This is a schematic diagram of the structure of an AR device provided in one embodiment of this application. (Reference) Figure 1b As shown, the AR device 100b may include a wearable part 11 and a device body 12. When a user wears the AR device 100b, the device body 12 is located in front of the user's eyes E to provide a display screen for the user's eyes. The wearable part 11 is used to fix it on the user's head or ears to achieve reliable wearing of the AR device 100b.

[0064] In practical applications, the AR device 100b provided in this embodiment can be in the form of glasses as shown in the figure. In this case, the main body 12 of the device can include a frame mounted above the user's nose and in front of the user's eyes, and the wearing part 11 can be a temple mounted on the user's ear. An optical waveguide 13 is provided inside the frame as a lens. The optical module 200 and the display module 300 can be set on the temple. The light emitted by the display module 300 passes through the optical module 200 and enters the optical waveguide 13. The optical waveguide 13 can change the direction of the light path and project the virtual image into the user's eyes, realizing the superposition of the virtual image and the real image. Optionally, the AR glasses can also be set in the form of a helmet. In this case, the display lens 10 is located at the front of the helmet. When the user wears the helmet, the display lens 10 is located in front of the user's eyes.

[0065] It is understandable that, for both VR device 100a and AR device 100b to display more and clearer images, the optical module 200 and display module 300 must be precisely positioned. This is especially true for the multi-lens optical module 200; if the lenses of the optical module 200 fail to focus or cover the display content of the display module 300, it will cause problems such as blurry images or missing content. Furthermore, the surface of the display panel of the display module 300 is the imaging surface, and the adhesive application width on the display panel surface is limited. Therefore, the aforementioned related technologies that use adhesive application to position the display panel and the bracket are technically challenging and have low reliability.

[0066] The following describes the display module 300 provided in this application embodiment in more detail, using VR device 100a as an example of a display device.

[0067] It should be noted that in the figures of the embodiments of this application, the Y-axis can be defined as the length direction of the VR device, that is, the direction from the left eye to the right eye when the user wears the VR device, and the direction of the Y-axis is from left to right. The X-axis can be defined as the thickness direction of the VR device, which can be regarded as the extension direction of the temple, or the direction from the display module 300 to the optical module 200, and the direction of the X-axis is from back to front. The Z-axis can be defined as the height direction of the VR device, that is, the direction from the user's eyes to the forehead when the user wears the VR device, and the direction of the Z-axis is from bottom to top.

[0068] Figure 2 This is a schematic diagram of the overall structure of the optical module and display module provided in one embodiment of this application. Figure 3 This is an exploded view of an optical module and a display module provided in one embodiment of this application. (Reference) Figure 2 and Figure 3 As shown, in VR device 100a, the optical module 200 can be positioned on the front side of the display module 300, i.e., the side facing the human eye. The optical module 200 may include a lens barrel and multiple lenses disposed within the lens barrel. The display module 300 may include a bracket 32, and the bracket 32 ​​and the lens barrel can be bonded together with adhesive to achieve a sealed and fixed connection.

[0069] Figure 4 This is an exploded view of a display module provided in one embodiment of this application. (Reference) Figure 4 As shown, this application embodiment provides a display module 300, which may include: a display screen 31, a bracket 32, and a transparent cover plate 33.

[0070] It should be understood that the shape of the display screen 31 is not specifically limited in this embodiment of the application. The display screen 31 can be various shapes such as rectangle, rounded rectangle, hexagon, octagon, etc. In this embodiment of the application, the display screen 31 is taken as a rectangle as an example to describe the structure of the display screen 31 and the structure of the bracket 32 ​​and the transparent cover plate 33 corresponding to the display screen 31.

[0071] The display screen 31 may include a display panel 311 and a flexible circuit board 313. The flexible circuit board 313 may have a wire extending from one side of the display panel 311. The bracket 32 ​​may include a receiving compartment 321 and a wire outlet 323. The receiving compartment 321 is a recessed receiving space used to receive the display panel 311. The flexible circuit board 313 extends out of the receiving compartment 321 from the wire outlet 323.

[0072] The bracket 32 ​​serves as a structural component of the display module 300, improving the overall structural strength. The bracket 32 ​​can be, for example, a metal bracket. As a accommodating space for the display screen 31, the shape of the accommodating compartment 321 can be the same as that of the display screen 31, for example, it can be rectangular. The accommodating compartment 321 has a certain depth d1, which is not less than the thickness of the display screen 31, so that the accommodating compartment 321 can house the display screen 31 internally, thereby protecting the display screen 31.

[0073] For ease of understanding, assuming that the flexible circuit board 313 is not required on the display panel 311, the entire display screen 31 can be fitted into the accommodating compartment 321. That is, the outer contour edges (e.g., the four sides) of the display screen 31 can be tightly abutted or interference-fitted with the inner sidewall of the accommodating compartment 321 to achieve four-sided positioning. In this case, the display screen 31 will not have positioning errors in the four directions of up, down, left, and right, so the display screen 31 can be accurately positioned.

[0074] However, in reality, due to the presence of the flexible circuit board 313, the lead-out edge of the display panel 311 connected to the flexible circuit board 313 cannot be positioned by interference fit with the side wall of the accommodating compartment 321. If positioning is achieved only by the remaining three sides, the positioning in the direction of the lead-out edge is missing, resulting in a positioning error of the display panel 311 in this direction. Therefore, the three-side positioning is insufficient to achieve precise positioning of the display screen 31.

[0075] In this embodiment, a positioning rib 322 can also be provided on the bracket 32. The positioning rib 322 can protrude from the inner sidewall of the accommodating compartment 321 and can be located on the adjacent side of the accommodating compartment 321 corresponding to the cable exit side. The transparent cover plate 33 can be fixedly connected to the side of the display panel 311 facing away from the accommodating compartment 321. The edge of the transparent cover plate 33 corresponding to the cable exit side can abut against the positioning rib 322 to achieve positioning of the display screen 31 in the direction of the cable exit side. For the two adjacent sides of the cable exit side, the transparent cover plate 33 abuts against the sidewall of the accommodating compartment 321 to achieve positioning. For the opposite side of the cable exit side, positioning can be achieved by the transparent cover plate 33 abutting against the sidewall of the accommodating compartment 321, or by the display panel 311 abutting against the sidewall of the accommodating compartment 321. Thus, four-sided positioning is achieved, which can improve the positioning accuracy of the display screen 31.

[0076] It should be noted that the number of positioning ribs 322 can be at least one, that is, positioning ribs 322 can be set on either of the two adjacent sides of the receiving compartment 321 corresponding to the outlet side, which can prevent the transparent cover plate 33 from having displacement error in the direction of the outlet side. It should be understood that the number of positioning ribs 322 can be two, that is, positioning ribs 322 can be set on both adjacent sides of the receiving compartment 321 corresponding to the outlet side. The symmetrical positioning ribs 322 on both sides can make the locking of the transparent cover plate 33 more reliable and prevent the transparent cover plate 33 from tilting due to uneven force on both sides.

[0077] It should be understood that the positioning rib 322 is a rib that protrudes to a certain height inside the accommodating compartment 321. The positioning rib 322 can be made as a whole with the bracket 32 ​​through an integral molding process, such as by using a mold.

[0078] In one specific embodiment, as shown in the figure, the cable outlet 323 can be located on the upper part of the receiving compartment 321, i.e., the cable outlet side is the upper side, the adjacent sides of the cable outlet side are the left and right sides, and the opposite side of the cable outlet side is the lower side. In this case, the positioning rib 322 can protrude from the left and / or right side walls of the receiving compartment 321, the top edge of the transparent cover 33 abuts against the positioning rib 322, the left and right sides of the transparent cover 33 can abut against the left and right sides of the receiving compartment 321 respectively, and the lower side of the transparent cover 33 and / or the lower side of the display panel 311 can abut against the lower side wall of the receiving compartment 321.

[0079] In this embodiment, the left and right sides of the transparent cover plate 33 extend beyond the display panel 311 by a certain length. Positioning ribs 322 are provided on the left and right walls of the accommodating compartment 321. The left and right edges of the top edge of the transparent cover plate 33 abut against the positioning ribs 322, which can realize the positioning of the display screen 31 in the upper direction. The positioning in the left, right and lower directions is achieved by the positioning of the three sides of the accommodating compartment 321.

[0080] The transparent cover 33 and the display screen 31 are fixedly connected to form a whole. The positioning on the left, right, and top sides is achieved by the interference fit of the transparent cover 33, while the positioning on the bottom side can be achieved by the bottom edge of the transparent cover 33 abutting against the lower side wall of the receiving compartment 321, or by the bottom edge of the display panel 311 abutting against the lower side wall of the receiving compartment 321, or by both simultaneously. Thus, the overall positioning of the display screen 31 can be precisely achieved.

[0081] It should be explained that the above descriptions of "up," "down," "left," and "right" are intended to facilitate understanding of the relative positions of the components, rather than defining their absolute positions. For example, the three sides of the accommodating compartment 321 corresponding to "the flexible circuit board 313 can be connected to the upper side of the display panel 311" are the left, right, and down sides. It is easy to understand that the flexible circuit board 313 can be connected to the left, right, or down side of the display panel 311. Apart from the wire-out side of the flexible circuit board 313, the other three sides of the accommodating compartment 321 are used to achieve the three-sided positioning of the display screen 31.

[0082] In addition, in this embodiment, the transparent cover 33 can be bonded to the display panel 311 with optical adhesive so that the transparent cover 33 will not affect the display quality of the display panel 311. Figure 5 This is a schematic diagram of the structure of a display screen and a bracket provided according to an embodiment of this application. (Reference) Figure 5 As shown, the accommodating compartment 321 includes a first inner sidewall 321a corresponding to the outlet side, a second inner sidewall 321b adjacent to the first inner sidewall 321a, and a third inner sidewall 321c opposite to the first inner sidewall 321a. The first inner sidewall 321a can be the upper sidewall, the two second inner sidewalls 321b can be the left sidewall and the right sidewall respectively, and the third inner sidewall 321c can be the lower sidewall.

[0083] Figure 6 This is a schematic diagram illustrating the structure of a display screen, a bracket, and a transparent cover plate according to an embodiment of this application. (Reference) Figure 6 As shown, the transparent cover plate 33 includes a first positioning edge 33a corresponding to the wire exit edge, a second positioning edge 33b adjacent to the first positioning edge 33a, and a third positioning edge 33c opposite to the first positioning edge 33a. The first positioning edge 33a can be the top edge, the two second positioning edges 33b can be the left side and the right side, and the third positioning edge 33c can be the bottom side.

[0084] Continue to refer to Figure 5 and Figure 6As shown, the width w1 of the display panel 311 is less than the distance w3 between the two positioning ribs 322, and the positioning ribs 322 do not provide positioning for the display panel 311. The width w4 of the transparent cover 33 is greater than the width w1 of the display panel 311. The left and right sides of the transparent cover 33 extend a certain length relative to the display panel 311. The width w4 of the transparent cover 33 is greater than the distance w3 between the two positioning ribs 322, so that the positioning ribs 322 provide positioning for the transparent cover 33. The width w4 of the transparent cover 33 can be greater than or equal to the distance w2 between the left and right side walls of the receiving compartment 321, so that the left and right sides of the transparent cover 33 and the receiving compartment 321 have an interference fit, achieving positioning on the left and right sides.

[0085] The relationship between the lower side of the transparent cover 33 and the display panel 311 is not specifically defined. When the lower side of the transparent cover 33 extends a certain length relative to the display panel 311, the transparent cover 33 and the lower side wall of the accommodating compartment 321 are abutted and positioned. When the lower side of the display panel 311 extends a certain length relative to the transparent cover 33, the display panel 311 and the lower side wall of the accommodating compartment 321 are abutted and positioned. When the lower side of the transparent cover 33 is flush with the display panel 311, the transparent cover 33 and the display panel 311 together abut and are positioned against the lower side wall of the accommodating compartment 321.

[0086] After a transparent cover plate 33 is attached to the surface of the display panel 311, the left, right and bottom sides of the accommodating compartment 321 of the bracket 32 ​​are positioned by the long side. The FPC cable outlet side is positioned by two positioning ribs 322 using the transparent cover plate 33 that extends beyond the display panel 311. This satisfies the positioning requirements while protecting the display panel 311 and reducing the collision between the display panel 311 and the bracket 32.

[0087] Overall, in this embodiment, by adding a transparent cover plate 33 and fixing it to the surface of the display screen 31, the maximum outline of the display screen 31 can be changed using the transparent cover plate 33. At the same time, a protruding positioning rib 322 is designed in the accommodating compartment 321 of the bracket 32, so that the FPC cable outlet side of the display screen 31 is positioned by the cooperation of the transparent cover plate 33 and the positioning rib 322. The remaining three sides are positioned by the interference fit between the display screen 31 and the inner sidewall of the accommodating compartment 321, thus achieving four-sided positioning as a whole and achieving the effect of precise positioning of the display screen 31.

[0088] In the above embodiments of this application, the width of the lead wires of the flexible circuit board 313 is equal to the width of the display panel 311. However, if the width of the lead wires of the flexible circuit board 313 is greater than the width of the display panel 311, the same precise positioning effect of the display screen 31 can be achieved by setting the width of the transparent cover plate 33 to be greater than the width of the lead wires of the flexible circuit board 313, and by setting the positioning ribs 322. Of course, it is easy to understand that the same positioning structure provided in this application embodiment, where the width of the lead wires of the flexible circuit board 313 is less than the width of the display panel 311, can also be applied.

[0089] Figure 7 This is a schematic diagram illustrating the structure of a display screen, bracket, transparent cover, and light-shielding sheet according to an embodiment of this application. (See reference) Figure 4 and Figure 7 As shown, the display module 300 may also include a light shield 34, the interior of which is provided with a viewing window opening 341 corresponding to the display panel 311. The bracket 32 ​​may also include a mating plane 324 located around the accommodating compartment 321, the accommodating compartment 321 being recessed inward relative to the mating plane 324, and the light shield 34 being mated to the mating plane 324 and the transparent cover plate 33.

[0090] The mating plane 324 is the skirt of the support 32 around the accommodating compartment 321. The outer contour of the mating plane 324 can be close to a circle to facilitate mating with the circular lens barrel of the optical module 200.

[0091] The light-shielding sheet 34 can be made of black light-shielding Mylar or other materials and is bonded to the bonding surface 324 and the transparent cover plate 33 with adhesive. The adhesive is distributed around the perimeter of the viewing window opening 341, which can improve the reliability of the bonding and provide a good sealing effect. On the one hand, the light-shielding sheet 34 can block the light in the non-display area to prevent external light from affecting the display effect of the display panel 311; on the other hand, the light-shielding sheet 34 can isolate the front light-emitting surface and the back surface of the display panel 311, preventing dust from entering the front light-emitting surface of the display panel 311 from the back side, thus providing a good dustproof effect.

[0092] In this embodiment, the transparent cover plate 33 also serves to provide a contact area for the light-shielding sheet 34. Figure 8 This is a side cross-sectional view of a display module provided in one embodiment of this application. (See reference) Figure 8 As shown, the surface of the transparent cover 33 facing away from the display panel 311 can be flush with the bonding plane 324, or it can be located on the side of the bonding plane 324 facing the receiving compartment 321.

[0093] The surface of the transparent cover 33 facing away from the display panel 311 can be flush with the bonding plane 324, which helps to provide a flat bonding surface for the light-shielding sheet 34. In this case, the sum of the thickness t1 of the display panel 311 and the thickness t2 of the transparent cover 33 can be considered equal to the depth d of the receiving chamber 321. Alternatively, the surface of the transparent cover 33 facing away from the display panel 311 can also be located on the side of the bonding plane 324 facing the receiving chamber 321. In this case, the distance between the two surfaces can be less than 0.2 mm, so that a flat bonding of the light-shielding sheet 34 can be achieved by adjusting the thickness of the adhesive on the transparent cover 33. In this case, the sum of the thickness t1 of the display panel 311 and the thickness t2 of the transparent cover 33 can be considered less than the depth d of the receiving chamber 321.

[0094] The display screen 31 may also include a chip 312, which protrudes relative to the display panel 311. A transparent cover plate 33 is fixedly connected to the display panel 311, and the thickness t2 of the transparent cover plate 33 is greater than or equal to the thickness t3 of the protrusion of the chip 312 relative to the display panel 311. It should be understood that without the transparent cover plate 33, because the chip 312 protrudes relative to the display panel 311, when the light-shielding sheet 34 is attached to the bonding plane 324 and the display panel 311, bulges will occur at the chip 312, which will not only affect the flatness of the appearance but also lead to unreliable bonding and poor light-shielding and dust-proof effects.

[0095] In this embodiment, after adding a transparent cover plate 33 with a certain thickness, the chip 312 no longer protrudes relative to the transparent cover plate 33. The transparent cover plate 33 and the bonding surface 324 can provide a flat bonding surface for the light-shielding sheet 34, so that the light-shielding sheet 34 can be reliably attached and the light-shielding and dust-proof effects can be improved.

[0096] The thickness of the transparent cover plate 33 is not specifically limited in this embodiment. If the transparent cover plate 33 is too thin, on the one hand, the structural strength is low, making it prone to damage during installation due to collision or compression with the bracket 32; on the other hand, it may cause the gap between the transparent cover plate 33 and the mating surface 324 to be too large, resulting in the light-shielding sheet 34 not fitting well. If the transparent cover plate 33 is too thick, on the one hand, it may affect the imaging effect; on the other hand, it will increase the overall size of the display module 300. In one possible implementation, the thickness of the transparent cover plate 33 is in the range of 0.6mm-1.2mm.

[0097] Continue to refer to Figure 4 and Figure 8As shown in this embodiment, the outlet 323 is located on the bottom wall of the accommodating compartment 321. The flexible circuit board 313 extends out of the accommodating compartment 321 from the outlet 323 and is bent and then pressed tightly against the back of the bottom wall of the accommodating compartment 321. A connector 314 is provided at the end of the flexible circuit board 313. The connector 314 is used to connect with the circuit board. The connector 314 can be, for example, a BTB (Board To Board) connector, and electrical connection is achieved by snapping together.

[0098] The display module 300 may also include a dustproof component 35, which can cover the cable outlet 323. The dustproof component 35 may include dustproof materials such as foam or double-sided foam. The dustproof component 35 is elastic and fills the cable outlet 323 to prevent dust from entering, while not damaging the flexible circuit board 313.

[0099] Figure 9 A schematic diagram of the display screen provided for related technologies. (Reference) Figure 9 As shown, in related technologies, the flexible circuit board 313 extends directly from the side of the display screen 31, occupying a large length space. At this time, a cable outlet needs to be opened on the side wall of the accommodating compartment 321 of the bracket 32 ​​to allow the flexible circuit board 313 to extend. Furthermore, it is difficult to install foam at the cable outlet for dust prevention. Therefore, the dust prevention requirement needs to be achieved through the structural dust prevention of the entire display device, which means that the dust prevention requirements for the entire device are higher.

[0100] contrast Figure 9 As can be seen, in the solution provided in this application embodiment, the flexible circuit board 313 does not extend directly from the side, but rather from the cable outlet 323 on the back of the bracket 32. On the one hand, the flexible circuit board 323 occupies a small volume, which is beneficial to the overall miniaturization design of the display module 300; on the other hand, it facilitates better adhesion and coverage of dustproof materials such as foam to the cable outlet 323. For example, foam can be provided on both sides of the flexible circuit board 323 to improve the dustproof effect. Furthermore, after the flexible circuit board 313 extends from the cable outlet 323, it is bent 180° and attached to the back of the bracket 32. The end of the flexible circuit board 313 can be connected to the circuit board through the connector 314. The back of the bracket 32 ​​provides a support surface for the connector 314, which is fastened and pressed to the circuit board, which helps to improve the reliability and stability of the connection.

[0101] The assembly process of the display module 300 provided in this application embodiment can be as follows: First, a display screen 31 and a transparent cover plate 33 are provided. The transparent cover plate 33 is attached to the surface of the display panel 311 of the display screen 31 with optical adhesive, and the two sides of the transparent cover plate 33 in the width direction extend beyond the edge of the display panel 311 by a certain length. Then, the display screen 31 is installed in the bracket 32, and the flexible circuit board 313 extends from the cable outlet 323 to the back of the bracket 32. The transparent cover plate 33 is snapped between the three sides of the accommodating compartment 321 and the positioning rib 322. Next, the light shield 34 is attached to the bonding plane 324 of the bracket 32 ​​and the transparent cover plate 33, and the viewing window opening 341 of the light shield 34 and the display area of ​​the display panel 311 are aligned. Finally, the flexible circuit board 313 is bent and attached to the back of the bottom wall of the accommodating compartment 321, and connected to the circuit board through the connector 314.

[0102] It should be added that after the display module 300 is assembled, it can be bonded to the optical module 200 by applying adhesive or using adhesive backing. The adhesive can be distributed around the mating surface 324 of the bracket 32 ​​and around the lens barrel of the optical module 200 to achieve a sealed connection between the bracket 32 ​​and the lens barrel, preventing dust from entering the surface of the transparent cover plate 33 or the lens inside the lens barrel, thus affecting the display effect.

[0103] In addition, it should be noted that in practical applications, the assembly of the display screen 31 and the transparent cover plate 33 can be pre-assembled in the factory where the display screen 31 is produced. The display panel 311 of the display screen 31 itself can be a stacked structure of substrate, light-emitting layer, optical adhesive layer, polarizing layer, cover plate, etc. The cover plate of the display screen 31 itself is relatively thin. The added transparent cover plate 33 is attached to the surface of the display panel 311 by optical adhesive after the display screen 31 is manufactured. The assembly and positioning of the transparent cover plate 33 and the display screen 31 can be achieved by the positioning structure of the display screen 31 itself during the production process, which will not be specifically described in the embodiments of this application.

[0104] The display screen 31 and the transparent cover plate 33 can be assembled and shipped as a whole to the manufacturer of display equipment. The subsequent assembly of the display screen 31 with the bracket 32, the light shield 34 and the optical module 200 is carried out in the manufacturer of display equipment.

[0105] It is easy to understand that for different models and sizes of display screens 31, transparent cover plates 33 of the same size can be used. Therefore, only the bracket 32 ​​and the light shield 34 of the same size need to be made to meet the assembly of display screen 31 and transparent cover plate 33.

[0106] In other words, the display module provided in this application embodiment is positioned by a transparent cover plate and positioning ribs on the bracket. In addition to the advantages of simple assembly and easy operation, it has a certain compatibility with displays of different sizes and specifications. Displays of different sizes and specifications can reuse the same set of structures, thereby reducing costs.

[0107] The display module and display device provided in this application embodiment can achieve precise positioning and fixation of the display panel by adding a transparent cover plate to the display panel and adding positioning ribs in the accommodating compartment of the bracket. The outline of the transparent cover plate cooperates with the accommodating compartment and positioning ribs.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display module, characterized by include: Display screen, bracket, and transparent cover; The display screen includes a display panel and a flexible circuit board, with the flexible circuit board extending from the lead-out edge of the display panel; The bracket includes a receiving compartment, and the display panel is disposed in the receiving compartment. The receiving compartment includes a first inner sidewall corresponding to the outlet side, a second inner sidewall adjacent to the first inner sidewall, and a third inner sidewall opposite to the first inner sidewall. At least one positioning rib is protruding from the second inner sidewall. The transparent cover is fixedly connected to the side of the display panel away from the receiving compartment. The transparent cover includes a first positioning edge corresponding to the outgoing edge, a second positioning edge adjacent to the first positioning edge, and a third positioning edge opposite to the first positioning edge. The first positioning edge abuts against the positioning rib, the second positioning edge abuts against the second inner sidewall, and the edge on the display panel opposite to the outgoing edge and / or the third positioning edge abuts against the third inner sidewall. Each of the two second inner sidewalls has a protruding positioning rib, and the two ends of the first positioning edge abut against the two positioning ribs respectively; the distance between the two positioning ribs is greater than the width of the display panel and less than the width of the transparent cover, so that the positioning ribs have no positioning effect on the display panel but have a positioning effect on the transparent cover. The bracket also includes a cable outlet, which is located on the bottom wall of the accommodating compartment. The flexible circuit board extends out of the accommodating compartment from the cable outlet and is bent and then attached tightly to the back of the bottom wall of the accommodating compartment.

2. The display module of claim 1, wherein, The display module also includes a light-shielding sheet, the interior of which is provided with a window opening corresponding to the display panel. The bracket also includes a fitting plane located around the accommodating compartment, the accommodating compartment being recessed inward relative to the fitting plane, and the light-shielding sheet being fitted to the fitting plane and the transparent cover plate.

3. The display module according to claim 2, characterized in that, The surface of the transparent cover away from the display panel is flush with the bonding plane or located on the side of the bonding plane facing the receiving compartment.

4. The display module according to claim 2, characterized in that, The display screen also includes a chip that protrudes from the display panel. A transparent cover plate is fixedly connected to the display panel, and the thickness of the transparent cover plate is greater than or equal to the thickness of the protruding chip relative to the display panel.

5. The display module according to any one of claims 1-4, characterized in that, The flexible circuit board has a connector at one end, which is used to connect to the circuit board.

6. The display module according to any one of claims 1-4, characterized in that, The display module also includes a dustproof component that covers the cable outlet.

7. The display module according to claim 6, characterized in that, The dustproof component includes foam.

8. The display module according to any one of claims 1-7, characterized in that, The width of the lead wires of the flexible circuit board is greater than or equal to the width of the display panel, and the width of the transparent cover is greater than the width of the lead wires of the flexible circuit board.

9. The display module according to any one of claims 1-8, characterized in that, The thickness of the transparent cover is 0.6mm-1.2mm.

10. The display module according to any one of claims 1-9, characterized in that, The transparent cover is bonded to the display panel using optical adhesive.

11. A display device, characterized in that, Includes the display module as described in any one of claims 1-10.

12. The display device according to claim 11, characterized in that, The display device is a head-mounted display device, which includes an optical module and a display module. The optical module and the display module are connected, and the optical module is used to magnify the image displayed by the display module.

13. The display device according to claim 12, characterized in that, The head-mounted display device includes a virtual reality (VR) device, and the optical module is attached to the support of the display module and is located on one side of the opening of the accommodating compartment.

Images