A secondary screen structure and display device

Abstract

The embodiments of the present disclosure provide a secondary screen structure and a display device, the secondary screen structure comprising: a cover plate comprising a first area and a second area; and a display module comprising a display panel and a flexible circuit board bound to the display panel; wherein the display panel comprises a light-emitting side and a backlight side disposed opposite to each other, the cover plate is stacked to the light-emitting side of the display panel, and the orthographic projection of the display panel on the cover plate is located within the first area; the flexible circuit board comprises a board body and components electrically connected to the board body, the board body comprises a main body area and an extension area, the main body area is stacked to the backlight side of the display panel, the extension area extends from the main body area and is stacked to the second area of ​​the cover plate, and the components are fixed between the extension area and the second area of ​​the cover plate. The secondary screen structure and display device provided by the embodiments of the present disclosure can save space in the entire device and reduce the difficulty of designing the entire device.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a secondary screen structure and a display device. Background Art

[0002] In related technologies, dual-display products require space constraints on the primary screen, necessitating the design of the secondary screen to accommodate the primary screen. This results in significant space loss and complicates overall device design. Furthermore, with the advancement of electronic products, increasing battery capacity and improving standby time have become key priorities in display product development. Summary of the Invention

[0003] The embodiments of the present disclosure provide a secondary screen structure and a display device, which can save space in the entire device and reduce the difficulty of designing the entire device.

[0004] The technical solutions provided by the embodiments of the present disclosure are as follows:

[0005] A secondary screen structure, comprising:

[0006] a cover plate comprising a first region and a second region; and

[0007] The display module includes a display panel and a flexible circuit board bound to the display panel;

[0008] The display panel comprises a light-emitting side and a backlight side disposed opposite to each other, the cover plate is stacked on the light-emitting side of the display panel, and the orthographic projection of the display panel on the cover plate is located in the first area;

[0009] The flexible circuit board includes a board body and components electrically connected to the board body, the board body includes a main body area and an extension area, the main body area is stacked to the backlight side of the display panel, the extension area extends from the main body area and is stacked to the second area of ​​the cover plate, and the components are fixed between the extension area and the second area of ​​the cover plate.

[0010] Exemplarily, the secondary screen structure also includes an elastic support pad, which surrounds the periphery of the component and is supported between the extension area and the second area of ​​the cover plate. The elastic support pad is configured to be greater than or equal to a predetermined thickness h so that the step difference between the extension area and the main body area in the direction perpendicular to the cover plate is less than a predetermined threshold.

[0011] Exemplarily, at least one of the elastic support pad and / or the component is attached to a side surface of the extension area facing the cover plate.

[0012] Exemplarily, the elastic support pad includes foam glue.

[0013] Exemplarily, the thickness of the component in a direction perpendicular to the cover is less than or equal to the predetermined thickness h.

[0014] Exemplarily, the predetermined thickness h satisfies the following relationship: h = H / (△h×K); wherein, H is the distance between the side surface of the first area of ​​the cover plate that is attached to the display panel and the side surface of the main body area facing the cover plate, in a direction perpendicular to the cover plate, △h is the thickness tolerance of the display panel, and K is the compression rate of the elastic support pad.

[0015] Exemplarily, the predetermined thickness h is 0.5-0.6 mm.

[0016] Exemplarily, an electromagnetic shielding layer is provided around the component to prevent signal crosstalk.

[0017] Exemplarily, the electromagnetic shielding layer is attached to the elastic support pad; and / or the electromagnetic shielding layer is wrapped around the outer surface of the component.

[0018] Exemplarily, the display module further includes:

[0019] A first functional film assembly is attached between the light-emitting side of the display panel and the cover plate;

[0020] an optical adhesive layer, bonding the first functional film assembly to the light-emitting side of the display panel;

[0021] a second functional film assembly, attached to the backlight side of the display panel and located between the display panel and the body area;

[0022] The backing adhesive is used to adhere the second functional membrane component and the main body area.

[0023] Exemplarily, the first functional film assembly includes a polarizer; the second functional film assembly includes: a back film and a heat dissipation film, the back film is adhered to the light-emitting side of the display panel, and the heat dissipation film is adhered to the side of the back film away from the display panel.

[0024] A display device includes the sub-screen structure described above.

[0025] The beneficial effects brought about by the embodiments of the present disclosure are as follows:

[0026] In the sub-screen structure and display device provided by the embodiments of the present disclosure, the display panel in the sub-screen structure is bonded to the first area on the cover plate, while the second area on the cover plate is not bonded to the display panel. The board body of the flexible circuit board is designed to be a main body area and an extension area. The main body board can be stacked to the backlight side of the display panel, and the extension area is stacked to the second area of ​​the cover plate, and the components of the flexible circuit board are arranged between the second area and the extension area. In this way, compared with the solution of stacking components in the display panel area in the related art, the components of the flexible circuit board are moved out of the area where the display panel is located and fixed outside the bonding area of ​​the display panel (i.e., the second area), thereby reducing the thickness of the entire sub-screen structure, saving the space of the entire machine, providing more options for the design of the entire machine, and reducing the difficulty of the design of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram showing a secondary screen structure provided in some embodiments of the present disclosure;

[0028] Figure 2 Indicates that the secondary screen structure provided in some embodiments of the present disclosure is along Figure 1 Partial cross-sectional view along the X-X' direction;

[0029] Figure 3 Indicates that the secondary screen structure provided in other embodiments of the present disclosure is along Figure 1 Partial cross-sectional view along the X-X' direction;

[0030] Figure 4 A schematic diagram showing the second surface of the flexible circuit board in the secondary screen structure provided in some embodiments of the present disclosure;

[0031] Figure 5 A schematic diagram showing the first surface of the flexible circuit board in the secondary screen structure provided in some embodiments of the present disclosure. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] Before describing in detail the secondary screen structure and display device provided by the embodiments of the present disclosure, it is necessary to describe the related technologies as follows:

[0035] In related technologies, with the development of electronic products, how to increase battery capacity and improve standby time has become the focus of display product development. When designing the sub-screen module, the cover plate is stacked on the light-emitting side of the display panel, while the flexible circuit board and its components are stacked on the backlight side of the display panel. If you want to increase the battery capacity, you can provide more space for the battery, etc. by thinning the entire sub-screen module. However, in terms of thinning the entire sub-screen display module, the display module mainly includes stacked polarizers, optical glue, display panel, back film and heat dissipation film, etc. If the thickness of the polarizer is thinned, it will affect the display effect such as integrated black; if the thickness of the optical glue is thinned, it may produce bonding bubbles; if the heat dissipation film is thinned, there may be film printing and other problems that cannot be solved; and the thickness of the flexible circuit board and other stacking layers is difficult to be thinned.

[0036] To address the aforementioned issues, the inventors of this disclosure, through creative work, considered reducing the overall space required for the device by reducing the thickness of the stacked components. For the secondary screen display module, the display panel is only attached to a portion of the cover plate. The attached area of ​​the display panel occupies a relatively small portion of the overall device space, while the non-attached area occupies a relatively large portion of the overall device space. Based on this, the secondary screen structure provided in the embodiments of this disclosure removes components from the attached area of ​​the display panel, reducing the module thickness, saving overall device space, and simplifying overall device design.

[0037] Specifically, if Figures 1 to 5As shown, the secondary screen structure provided by the embodiment of the present disclosure includes a cover plate 10 and a display module 20, wherein the cover plate 10 includes a first area C1 and a second area C2, wherein the first area C1 is a bonding area for bonding to the display panel, and the second area C2 is a non-bonding area that does not bond to the display panel; the display module 20 includes a display panel 21 and a flexible circuit board 22 bound to the display panel 21; wherein

[0038] The display panel 21 includes a light-emitting side and a backlight side arranged opposite to each other, the cover plate 10 is stacked on the light-emitting side of the display panel 21, and the orthographic projection of the display panel 21 on the cover plate 10 is located in the first area C1; the flexible circuit board 22 includes a board body 221 and components 222 electrically connected to the board body 221, the board body 221 includes a main body area 2211 and an extension area 2212, the main body area 2211 is stacked on the backlight side of the display panel 21, the extension area 2212 is formed by extending the main body area 2211, and the extension area 2212 is stacked on the second area C2 (i.e., the non-bonding area) of the cover plate 10, and the component 222 is fixed between the extension area 2212 and the second area C2 of the cover plate 10.

[0039] In the above scheme, the display panel 21 in the secondary screen structure is attached to the first area C1 (attachment area) on the cover plate 10, while the second area C2 on the cover plate 10 is not attached to the display panel 21. The board body 221 of the flexible circuit board 22 is designed to be divided into a main area 2211 and an extension area 2212. The main area 2211 can be stacked on the backlight side of the display panel 21, while the extension area 2212 is stacked on the second area C2 of the cover plate 10, and the components 222 of the flexible circuit board 22 are arranged between the second area C2 and the extension area 2212. In this way, compared with the scheme of stacking components on the back of the display panel in the related art, the components 222 of the flexible circuit board 22 are moved out of the area where the display panel 21 is located and fixed outside the attaching area of ​​the display panel 21 (i.e., the second area C2) to reduce the thickness of the entire module stack, thereby reducing the thickness of the entire secondary screen structure, saving the space of the entire machine, and providing more options for the design of the entire machine, such as increasing the battery compartment capacity and reducing the difficulty of the entire machine design. The secondary screen structure provided in the embodiment of the present disclosure can reduce the thickness of the display module by about 0.5 mm, thereby greatly saving the space of the entire device, because the components 222 are stacked in the non-bonded area of ​​the display panel 21.

[0040] The plate body 221 may include a first surface a facing the display panel 21 and a second surface b opposite to the first surface a. Figure 4 FIG. 2 is a schematic diagram of the second surface b of the flexible circuit board 22. Figure 5The figure shows a schematic diagram of the first surface a of the flexible circuit board 22. Adhesive tape 23 can be provided on the first surface a. The first surface a of the main body area 2211 is bonded to the first area C1 of the cover plate 10 via the adhesive tape 23. The components 222 can be bonded to the first surface a of the extension area 2212. It should be noted that this figure is an exemplary embodiment. In actual applications, the specific location of the extension area 2212 relative to the second area C2 is not limited to the position shown in the figure and can be adjusted based on the space requirements of the entire device.

[0041] Furthermore, in some exemplary embodiments, Figures 1 to 3 、 Figure 5 As shown, the secondary screen structure also includes an elastic support pad 30, which surrounds the periphery of the component 222 and is supported between the extension area 2212 and the second area C2 of the cover plate 10. The elastic support pad 30 is configured to be greater than or equal to a predetermined thickness h so that the step difference between the extension area 2212 and the main body area 2211 in the direction perpendicular to the cover plate 10 is less than a predetermined threshold.

[0042] According to the above scheme, since the extension area 2212 of the flexible circuit board 22 is extended from the main body area 2211, the main body area 2211 is stacked on the light-emitting side of the display panel 21, that is, the display panel 21 and other screen components are stacked between the main body area 2211 and the cover plate 10, and the components 222 are stacked between the extension area 2212 and the cover plate 10. The thickness of the components 222 in the direction perpendicular to the cover plate 10 is generally less than the thickness of the display panel 21 and other components. Therefore, in order to fill the step difference between the extension area 2212 and the main body area 2211, the elastic support pad 30 is used to support the extension area 2212 and the cover plate 10 to prevent the extension area 2212 from shaking.

[0043] It should be noted that the step difference between the extension area 2212 and the main area 2211 in a direction perpendicular to the cover plate 10 is less than a predetermined threshold, which may mean that the extension area 2212 is substantially flush with the main area 2211. The predetermined threshold may be within a tolerance range. For example, the predetermined threshold may be 0.

[0044] Exemplarily, the elastic support pad 30 is attached to the side of the extension area 2212 facing the cover plate 10. Exemplarily, the elastic support pad 30 includes foam glue, which can be attached to the first surface a of the extension area 2212 and attached to the cover plate 10 to prevent the entire device from shaking. The process is simple and risk-free.

[0045] In addition, if Figure 2 As shown in FIG. 1 , as an exemplary embodiment, the thickness of the component 222 in a direction perpendicular to the cover plate 10 is less than or equal to the predetermined thickness h. This prevents the component 222 from lifting the extension area 2212 and causing a step difference, and the space supported by the elastic support pad 30 can effectively protect the component 222.

[0046] In some exemplary embodiments, the predetermined thickness h satisfies the following relationship: h = H / (△h×K); wherein, H is the distance between the side surface of the first area C1 of the cover plate 10 that is attached to the display panel 21 and the side surface of the main body area 2211 facing the cover plate 10, in a direction perpendicular to the cover plate 10, △h is the thickness tolerance of the display panel 21, and K is the compression rate of the elastic support pad 30.

[0047] It should be noted that the lower limit of the predetermined thickness h of the elastic support pad 30 should be higher than the upper limit of the thickness tolerance of the display module 20 to prevent the elastic support pad 30 from being deviated from the lower limit. That is to say, the elastic support pad 30 should satisfy the step difference between the extension area 2212 and the main body area. The predetermined thickness h of the elastic support pad 30 should be as greater than its lower limit as possible. This is because if the thickness of the elastic support pad 30 is deviated from the lower limit, when the thickness value of the display module 20 is deviated from the upper limit, the flexible circuit board 22 will crush the display panel 21.

[0048] In some exemplary embodiments, the predetermined thickness h is 0.5 to 0.6 mm. Of course, it is understood that in practical applications, the thickness of the elastic support pad 30 is not limited thereto.

[0049] In some exemplary embodiments, Figure 2 and Figure 3 As shown, the display module 20 further includes:

[0050] A first functional film assembly 24 is attached between the light-emitting side of the display panel 21 and the cover plate 10;

[0051] an optical adhesive layer 25 , bonding the first functional film assembly 24 to the light-emitting side of the display panel 21 ;

[0052] a second functional film assembly 26 , attached to the backlight side of the display panel 21 and located between the display panel 21 and the body area 2211 ; and

[0053] The adhesive 23 adheres the second functional membrane assembly 26 to the main body area 2211 .

[0054] Exemplarily, the first functional film assembly 24 includes a polarizer 241; the second functional film assembly 26 includes a backing film 261 and a heat dissipation film 262. The backing film 261 is attached to the light-emitting side of the display panel 21, and the heat dissipation film 262 is attached to the side of the backing film facing away from the display panel 21. In this exemplary embodiment, H can be the sum of the thicknesses of the optical adhesive layer 25, the polarizer 241, the display panel 21, the backing film 261, and the heat dissipation film 262.

[0055] In addition, in some exemplary embodiments, an electromagnetic shielding layer 40 for preventing signal crosstalk is disposed around the component 222. Such a configuration can enhance the anti-interference capability of the flexible circuit board 22.

[0056] Specifically, in some embodiments, Figure 2 As shown, the electromagnetic shielding layer 40 can be attached to the elastic support pad 30. In other embodiments, as Figure 3 As shown, the electromagnetic shielding layer 40 can be wrapped around the outer surface of the component 222, for example, by coating an insulating layer on the surface of the component 222 to achieve an electromagnetic shielding effect. Of course, it is understandable that the electromagnetic shielding layer 40 can be simultaneously attached to the elastic support pad 30 and coated on the surface of the component 222.

[0057] In addition, the embodiment of the present disclosure further provides a display device, including the secondary screen structure provided by the embodiment of the present disclosure. The display device may be a dual-screen display device, including a main screen and the secondary screen structure.

[0058] Obviously, the display device provided by the embodiment of the present disclosure can also bring about the beneficial effects brought by the secondary screen structure provided by the embodiment of the present disclosure.

[0059] There are a few points to note:

[0060] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure. Other structures may refer to conventional designs.

[0061] (2) For the sake of clarity, the thickness of layers or regions in the drawings used to describe the embodiments of the present disclosure are exaggerated or reduced, i.e., these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or intervening elements may be present.

[0062] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to form new embodiments.

[0063] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. The protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A secondary screen structure, characterized in that: include: a cover plate comprising a first region and a second region; and A display module, comprising a display panel and a flexible circuit board bound to the display panel; in The display panel comprises a light-emitting side and a backlight side disposed opposite to each other, the cover plate is stacked on the light-emitting side of the display panel, and the orthographic projection of the display panel on the cover plate is located in the first area; The flexible circuit board includes a board body and components electrically connected to the board body, the board body includes a main body area and an extension area, the main body area is stacked to the backlight side of the display panel, the extension area extends from the main body area and is stacked to the second area of ​​the cover plate, and the components are fixed between the extension area and the second area of ​​the cover plate.

2. The secondary screen structure according to claim 1, characterized in that: The secondary screen structure also includes an elastic support pad, which surrounds the periphery of the component and is supported between the extension area and the second area of ​​the cover plate. The elastic support pad is configured to have a thickness in a direction perpendicular to the cover plate that is greater than or equal to a predetermined thickness h, so that the step difference between the extension area and the main body area in a direction perpendicular to the cover plate is less than a predetermined threshold; wherein, the predetermined thickness h satisfies the following relationship: h=H / (△h×K); wherein H is the distance between the side surface of the first area of ​​the cover plate that is attached to the display panel and the side surface of the main body area facing the cover plate, in a direction perpendicular to the cover plate, △h is the thickness tolerance of the display panel, and K is the compression rate of the elastic support pad.

3. The secondary screen structure according to claim 2, characterized in that: At least one of the elastic support pad and / or the components is attached to a side surface of the extension area facing the cover plate.

4. The secondary screen structure according to claim 2, characterized in that: The elastic support pad includes foam glue.

5. The secondary screen structure according to claim 2, characterized in that: The thickness of the component in a direction perpendicular to the cover is less than or equal to the predetermined thickness h.

6. The auxiliary screen structure according to claim 2, characterized in that: The predetermined thickness h is 0.5-0.6 mm.

7. The auxiliary screen structure according to claim 2, characterized in that: An electromagnetic shielding layer is provided around the component to prevent signal crosstalk.

8. The auxiliary screen structure according to claim 7, characterized in that: The electromagnetic shielding layer is attached to the elastic support pad; and / or the electromagnetic shielding layer is wrapped around the outer surface of the component.

9. The secondary screen structure according to claim 1, characterized in that: The display module further includes: A first functional film assembly is attached between the light-emitting side of the display panel and the cover plate; an optical adhesive layer, bonding the first functional film assembly to the light-emitting side of the display panel; a second functional film assembly, attached to the backlight side of the display panel and located between the display panel and the body area; The backing adhesive is used to adhere the second functional membrane component and the main body area.

10. The auxiliary screen structure according to claim 9, characterized in that: The first functional film assembly includes a polarizer; the second functional film assembly includes: a back film and a heat dissipation film, the back film is attached to the backlight side of the display panel, and the heat dissipation film is attached to the side of the back film away from the display panel.

11. A display device, characterized in that: It comprises the secondary screen structure as described in any one of claims 1 to 10.

Images