Display panel and display device

Abstract

The utility model discloses a display panel and a display device, and the display panel comprises a lamp panel which is provided with a light emitting side and comprises a plurality of lamp panel units which are spliced with one another; the at least one optical film covers the whole light emitting side; and each optical film covers at least two lamp panel units. Each optical film covers at least two lamp panel units, so that the display effect at the splicing gaps of the lamp panel units can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Currently, some spliced display panels, such as the display screens of TVs or all-in-one conference machines, are often made up of multiple light board units.

[0003] In related technologies, each light panel unit is provided with an independent film on its light-emitting surface. These units are often spliced together after being individually laminated, requiring high precision. If the splicing gap and flatness of the light panel units do not meet the requirements, defects may easily appear in the film of adjacent light panel units at the splicing gap, affecting the display effect. Utility Model Content

[0004] Some embodiments of the present application provide a display panel and a display device to improve the problem that defects are easily generated at the joint gaps between the membranes of adjacent light panel units.

[0005] As a first aspect of the present application, some embodiments of the present application provide a display panel, including:

[0006] A light panel having a light emitting side and comprising a plurality of light panel units spliced together;

[0007] At least one optical film covering the entire light-emitting side;

[0008] Wherein, each of the optical films covers at least two of the light board units.

[0009] Optionally, in some embodiments of the present application, each of the light board units has a light emitting surface, and the light emitting surface of each of the light board units is flush with the light emitting surface of the adjacent light board units.

[0010] Optionally, in some embodiments of the present application, each of the light board units further has a plurality of side surfaces connected to the light emitting surface and connected end to end along the circumference of the light board unit. For any two adjacent light board units, the two side surfaces arranged opposite to each other abut against each other.

[0011] Optionally, in some embodiments of the present application, the thickness of the optical film ranges from 80 microns to 150 microns.

[0012] Optionally, in some embodiments of the present application, the number of the light board units covered by each optical film ranges from 2 to 300.

[0013] Optionally, in some embodiments of the present application, the aspect ratio of the optical film ranges from 1.1 to 2.5.

[0014] Optionally, in some embodiments of the present application, the number of the optical film is one, and the format size of the optical film is the same as the format size of the light board.

[0015] Optionally, in some embodiments of the present application, the display panel includes a plurality of optical films, and the plurality of optical films are spliced together, and the format size of the plurality of optical films after splicing is the same as the format size of the light board.

[0016] Optionally, in some embodiments of the present application, at least some of the plurality of optical films have different sizes, and the size of the optical film located in the middle of the light board is larger than the size of the optical films located around the light board.

[0017] Optionally, in some embodiments of the present application, the optical film includes: an AG layer, a base layer and a back adhesive layer;

[0018] The adhesive layer is bonded to the light-emitting side surface of the light board, and the base layer is sandwiched between the AG layer and the adhesive layer;

[0019] The thickness of the AG layer ranges from 5 microns to 10 microns; the thickness of the base layer ranges from 20 microns to 100 microns; and the thickness of the adhesive layer ranges from 30 microns to 120 microns.

[0020] As a second aspect of the present application, some embodiments of the present application provide a display device including the aforementioned display panel.

[0021] As a third aspect of the present application, some embodiments of the present application provide a method for manufacturing a display device, comprising the following steps:

[0022] Provide multiple light panel units;

[0023] A plurality of the light board units are spliced together to form a light board, wherein the light board has a light emitting side;

[0024] providing at least one optical film;

[0025] The optical film is attached to the light-emitting side of the lamp panel, so that each optical film covers at least two lamp panel units.

[0026] Optionally, in some embodiments of the present application, the following step is further included: installing the light panel to the box.

[0027] Optionally, in some embodiments of the present application, attaching the optical film to the light board so that each optical film covers at least two light board units includes:

[0028] A degassing process is performed between the optical film and the lamp board unit at a preset pressure and a preset temperature.

[0029] Optionally, in some embodiments of the present application, the preset pressure and / or the preset temperature is proportional to the thickness of the optical film.

[0030] The beneficial effect of the present application is that by making each optical film cover at least two light board units, compared with the existing technology, when the display panel size is constant, the number of optical films used can be reduced, thereby reducing the seams between the optical films to improve the display effect; at the same time, for multiple light board units covered under the same optical film, since there is no superposition effect of the seams of the light board units and the seams of the optical films between each other, it also helps to improve the display effect at the seams of the light board units. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In the attached figure:

[0032] Figure 1 is a perspective view of a display panel according to an embodiment of the present application;

[0033] Figure 2 is an exploded view of a display panel according to an embodiment of the present application;

[0034] Figure 3 is a partial exploded view of a light board in a display panel according to an embodiment of the present application;

[0035] Figure 4 is a cross-sectional view of a spliced display panel in the prior art;

[0036] Figure 5 is a cross-sectional view of a display panel according to a first embodiment of the present application;

[0037] Figure 6 is a cross-sectional view of a display panel according to a second embodiment of the present application;

[0038] Figure 7 is a cross-sectional view of a display panel according to a third embodiment of the present application;

[0039] Figure 8 is a cross-sectional view of a display panel according to a fourth embodiment of the present application;

[0040] Figure 9 is a cross-sectional view of a display panel according to a fifth embodiment of the present application;

[0041] Figure 10 yes Figure 9 An enlarged view of a portion of the image.

[0042] Figure 11is a perspective view of a display device according to an embodiment of the present application from a first viewing angle;

[0043] Figure 12 is a perspective view of a display device according to an embodiment of the present application from a second viewing angle;

[0044] Figure 13 1 is an exploded view of a display device according to an embodiment of the present application.

[0045] Description of reference numerals:

[0046] 100. Display panel;

[0047] 110, light board; 110a, light output side; 111, light board unit; 111a, side surface; 112, colloid;

[0048] 120, optical film; 121, AG layer; 122, base layer; 122a, placeholder protrusion; 123, adhesive layer; 123a, groove; 123b, embedded portion;

[0049] Da, the distance between the two sides;

[0050] D0, thickness of optical film;

[0051] D1, thickness of AG layer;

[0052] D2, thickness of the base layer;

[0053] D3, thickness of adhesive layer;

[0054] 10. Display device; 200. Cabinet. DETAILED DESCRIPTION

[0055] The following will describe embodiments of the present application in more detail with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are for illustrative purposes only and are not intended to limit the scope of protection of the present application.

[0056] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0057] It should be noted that the concepts of "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0058] It should be noted that the modifications of "one" and "multiple" mentioned in this application are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0059] The names of the messages or information exchanged between multiple devices in the embodiments of the present application are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0060] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0061] Reference Figures 1 to 3 As shown, the present application provides a display panel 100 , which includes a light board 110 and an optical film 120 .

[0062] The light board 110 has a light emitting side 110a, and the light board 110 includes a plurality of light board units 111 spliced to each other; it can be understood that adjacent light board units 111 are spliced in a direct contact manner so that the splicing gap is controlled within a smaller range.

[0063] At least one optical film 120 is provided, covering the entire light-emitting side 110a; each optical film 120 covers at least two light board units 111. It is understood that the optical film 120 can at least cover the gap between two light board units 111, or at least cover the surfaces of two light board units 111 and the gap between two adjacent light board units 111.

[0064] By adopting the above solution, by making each optical film cover at least two light board units, compared with the existing technology, when the display panel size is constant, the number of optical films used can be reduced, thereby reducing the seams between the optical films to improve the display effect; at the same time, for multiple light board units covered under the same optical film, since there is no superposition effect of the seams of the light board units and the seams of the optical films between each other, it also helps to improve the display effect at the seams of the light board units.

[0065] Moreover, by making each optical film 120 cover at least two light board units 111, the height difference and gap caused by the splicing of the light board units 111 can be effectively eliminated, avoiding the appearance of black lines during color correction due to height differences and gaps in the spliced light boards, affecting the viewing experience, and reducing the impact on the smoothness of writing with a stylus or finger, and even avoiding the outward peeling of the optical film due to scratches by a stylus or finger.

[0066] At the same time, since multiple light panel units 111 are formed as a whole through the optical film 120, during the assembly process with the box 200, the whole formed by the light panel 110 and the optical film 120 is directly assembled with the box 200. There is no need to splice the light panel units 111 piece by piece on the box 200, which can effectively reduce the clamping components and magnetic components used for positioning and fixing on the light panel unit 111, thereby saving costs to a great extent.

[0067] In some embodiments, the plurality of light panel units 111 may be joined and fixed by bonding.

[0068] As an optional bonding method, refer to Figure 5 As shown, a colloid 112 is provided at the joints on the back of the plurality of light board units 111 , and the colloid 112 is used to splice the plurality of light board units 111 into a whole, thereby maintaining the flatness of the light emitting side 110 a of the light board 110 .

[0069] The colloids 112 located at the seams may be independent of each other, or a plurality of colloids 112 located at the seams may be connected to each other.

[0070] As another optional bonding method, a support body is provided on the back of the light board unit 111, and the support body is bonded to at least two light board units 111 through the glue 112 at the same time. While realizing the splicing and fixation of multiple light board units 111, it can support the light board unit 111 and improve the structural stability of the display panel 100.

[0071] In some embodiments, each light board unit 111 has a light emitting surface, and the light emitting surface of each light board unit 111 is flush with the light emitting surface of an adjacent light board unit 111 .

[0072] With this solution, there is no height difference between the multiple lamp board units 111 , which improves the flatness of the light-emitting side 110 a of the lamp board 110 composed of the multiple lamp board units 111 , allowing for better adhesion with the optical film 120 .

[0073] In some embodiments, reference Figure 3 As shown, each light board unit 111 further has a plurality of side surfaces 111 a connected to the light emitting surface and connected end to end along the circumference of the light board unit 111 . For any two adjacent light board units 111 , the two oppositely disposed side surfaces 111 a abut against each other.

[0074] Since two adjacent light panel units 111 abut against each other through the two oppositely arranged side surfaces 111 a , the splicing gap can be better controlled, which is beneficial for reducing the size of the splicing gap.

[0075] It is understood that due to factors such as installation accuracy or the structure itself, there may be a certain gap between the two side surfaces 111a of two adjacent light board units 111. Figure 5 As shown, the distance Da between the two oppositely disposed side surfaces 111 a of two adjacent light board units 111 is less than or equal to 5 micrometers.

[0076] By limiting the distance Da between the two oppositely disposed side surfaces 111 a of the light board unit 111 , the colloid 112 is prevented from penetrating into the gap between adjacent light board units 111 during the splicing process of the light board units 111 , thereby improving the splicing effect.

[0077] In some embodiments, reference Figure 5 As shown, the thickness D0 of the optical film 120 ranges from 80 micrometers to 150 micrometers.

[0078] By adopting such thickness parameters, good display effects can be achieved while meeting the requirements of operational performance and cost control.

[0079] During the design and manufacturing process of the display panel 100 , the optimal film thickness can be adjusted to balance these factors according to factors such as the characteristics of the light board unit 111 and usage requirements, so as to achieve the best display effect, user experience and cost control.

[0080] In some embodiments, the number of light panel units 111 covered by each optical film 120 ranges from 2 to 300.

[0081] As a preferred solution, the number of light board units 111 covered by each optical film 120 ranges from 8 to 200.

[0082] In some embodiments, the aspect ratio of the optical film 120 ranges from 1.1 to 2.5.

[0083] In some embodiments, there is one optical film 120, and the size of the optical film 120 is the same as the size of the light board 110. This optical film 120 covering solution allows all light board units 111 to be covered in one laminating operation, resulting in high laminating efficiency.

[0084] In some embodiments, the maximum size L of the optical film 120 satisfies the following formula:

[0085] L=K×D0+A

[0086] Where L is the maximum dimension of the optical film 120 in microns, D0 is the thickness of the optical film 120 in microns, K is the multiplication coefficient, and A is the correction constant. K ranges from 16,000 to 25,000, and A ranges from 80 to 115, with A in microns.

[0087] When laminating the optical film 120, the general idea is to set the thickness of the optical film 120 according to the requirements of the display panel 100. This is determined by the design of the display panel 100 and the display effect. According to the principle of integrated lamination, the thicker the optical film 120, the more it can compensate for the unevenness caused by the splicing of the light board unit 111.

[0088] While using a single optical film 120 for the entire light panel 110 is a preferred option, the larger the size of the optical film 120, the more likely it is to develop internal wrinkles or unevenness defects, resulting in thickness variations. As the length of the optical film 120 increases, some areas may experience even greater unevenness than that caused by the light panel unit 111. Therefore, as an alternative, the size of the individual optical films 120 needs to be balanced and limited. They cannot be too small to achieve the technical effect of integrated lamination, nor too large to cause defects due to the cumulative length. Based on these considerations, the aforementioned empirical formula can be used to achieve a balanced size design.

[0089] In some embodiments, the display panel 100 includes a plurality of optical films 120 , which are spliced together, and the size of the spliced optical films 120 is the same as the size of the light board 110 .

[0090] The light board 110 is covered by splicing together a plurality of optical films 120 , so that the same optical film 120 can cover a plurality of light board units 111 while reducing the requirement on the size of the optical film 120 .

[0091] As an optional solution, multiple optical films 120 of the same size are regularly arranged on the light-emitting side 110a of the light board 110. Using multiple optical films 120 of the same size and regularly arranged on the light-emitting side 110a of the light board 110 reduces the size requirements for the optical films 120 and reduces the difficulty of the lamination process.

[0092] Because users primarily focus on the central area of the light board 110 when viewing the image displayed on the display panel 100, as another optional solution, at least some of the multiple optical films 120 have different sizes, with the optical films 120 located in the central area of the light board 110 having larger sizes than the optical films 120 located on the periphery of the light board 110. By using optical films 120 of different sizes for lamination, with the larger optical film 120 in the central area of the light board 110, the size requirement for the optical films 120 is reduced while ensuring display quality and improving user experience, thus achieving a balance between display quality and manufacturing difficulty.

[0093] In some embodiments, reference Figure 5 As shown, the optical film 120 includes an AG layer 121 , a base layer 122 and a back adhesive layer 123 .

[0094] Specifically, the adhesive layer 123 is bonded to the light-emitting side 110a of the light board 110, securing the optical film 120 to the light board 110. The base layer 122 is sandwiched between the AG layer 121 and the adhesive layer 123, supporting the AG layer 121 and the adhesive layer 123 and enhancing the structural stability of the optical film 120. The thickness D1 of the AG layer 121 ranges from 5 to 10 microns; the thickness D2 of the base layer 122 ranges from 20 to 100 microns; and the thickness D3 of the adhesive layer 123 ranges from 30 to 120 microns.

[0095] Since the optical film 120 adopts the above composite film layer structure, it is possible to balance the optical and tensile forces of the optical film 120 , effectively solve the attachment process and ensure the display effect.

[0096] In some embodiments, the base layer 122 is a PET layer. The adhesive layer 123 is an OCA layer. The surface of the AG layer 121 is flat. The display panel 100 is a Micro-LED display panel 100.

[0097] Reference Figure 4 As shown, each light panel unit 111 will produce Figure 4 The gap defects between the optical films 120 shown in the figure, and due to the inconsistent shrinkage between the optical film 120 and the light board 110, the gap size Da between adjacent light board units 111 and the gap size Db between adjacent optical films 120 will be inconsistent, further aggravating the gap size and unevenness defects.

[0098] Reference Figure 5As shown, with the coating solution of the present application, it can be seen that the optical film 120 covers the gaps between the light board units 111, thereby preventing defects. However, due to the aforementioned issue of the length of the optical film 120 and the different shrinkage rates of the optical film 120 and the light board units 111, unevenness defects may still occur in the gaps between the light board units 111.

[0099] Reference Figure 6 As shown, as a preferred solution, a place-occupying protrusion 122a is formed on the base layer 122 of the optical film 120 at the gap between the light board units 111, and is embedded in the back glue layer 123 to form a groove 123aa in the back glue layer 123, so that when the back glue layer 123 is attached, an embedded portion 123b is generated which is embedded in the gap between the light board units 111 due to the existence of the place-occupying protrusion 122a. This embedded portion 123b helps to eliminate the unevenness defects caused by the gap, and at the same time, it will relatively limit the optical film 120 when the light board units 111 and the optical film 120 shrink inconsistently, so that it will not produce large wrinkles. Figure 6 The placeholder protrusion 122 a of the illustrated solution is rectangular, which is easier to process, but the adhesive layer 123 may generate stress concentration.

[0100] Reference Figure 7 As shown in the figure, as an improvement solution, a trapezoidal interface can be used to relatively improve the stress concentration situation.

[0101] Reference Figure 8 As shown, as a further improvement, a semicircular cross-section can be used, which not only ensures uniform force in all directions but also has a better space-occupying effect.

[0102] Reference Figure 9 and Figure 10 As shown, as a further improvement, a circular arc and two tangent lines tangent thereto may be used to form a cross-sectional shape to form the space-occupying protrusion 122a, which can achieve the space-occupying effect as much as possible and relatively eliminate the problem of stress concentration.

[0103] Reference Figure 11 and Figure 13 As shown, the present application further provides a display device 10, comprising the aforementioned display panel 100 and a housing 200. The housing 200 is used to fix the display panel 100 and to form a plurality of light board units 111 in the display panel 100 into a whole.

[0104] Since the multiple light panel units 111 are formed into a whole, during the assembly process with the box body 200, the whole body can be directly assembled with the box body 200, and there is no need to splice the light panel units 111 piece by piece on the box body 200. This can effectively reduce the clamping components and magnetic components used for positioning and fixing on the box body 200, thereby saving costs to a great extent.

[0105] The present application also provides a method for manufacturing a display device 10, the method comprising the following steps:

[0106] S110: providing a plurality of light board units 111;

[0107] S120: Assemble multiple light board units 111 to form a light board 110, wherein the light board 110 has a light emitting side 110a;

[0108] S130: providing at least one optical film 120;

[0109] S140 : attaching the optical film 120 to the light-emitting side 110 a of the light board 110 , so that each optical film 120 covers at least two light board units 111 .

[0110] By adopting the above solution, a plurality of light panel units 111 are covered by an integral optical film 120 , which can effectively eliminate the height difference and gap caused by splicing the light panel units 111 , thereby improving the display effect.

[0111] In some embodiments, the manufacturing method of the display device 10 further includes the following steps:

[0112] The light board 110 is mounted to the housing 200 .

[0113] In some embodiments, step 120 includes:

[0114] S121: Lay the plurality of light panel units on a splicing platform with their light-emitting surfaces facing each other, and position the adjacent light panel units so that their side surfaces abut against each other;

[0115] S122: Apply glue to the joint gaps on the back of the light panel units;

[0116] S123: solidifying the dispensed glue to fix each light board unit into a light board.

[0117] Among them, in step S121, the splicing platform has a reference plane, and a vacuum adsorption device is used on the splicing platform so that the light-emitting surfaces of all lamp panel units are laid on the reference plane with the reference plane as the positioning reference, ensuring that the light-emitting surfaces of each lamp panel unit are flush.

[0118] In step S121, the splicing platform is further provided with a horizontal pushing device, which provides a thrust parallel to the reference plane on the outer side of the whole formed by the multiple light board units, so that the side surfaces of adjacent light board units abut against each other.

[0119] In step S122, glue is dispensed at the joint gap using glue dispensing equipment. The glue at the joint gap may be independent of each other, or multiple glues at the joint gap may be connected to each other.

[0120] In step S123 , the colloid may be cured by UV lamp irradiation or thermal curing, and the curing method and curing time are selected according to the specific process.

[0121] As a specific implementation, taking a 135-inch display panel as an example, the length of its light board is about 3000 mm (that is, 20 light board units are set in the horizontal direction), and the width is about 1687.5 mm (that is, 10 light board units are set in the vertical direction). In this way, the light board is composed of 200 light board units.

[0122] The width of the optical film used in the integrated lamination is about 1690 mm, so the single side is about 1.25 mm wider than the light board, and the length of the optical film is a continuous roll.

[0123] The light panel moves over the optical film and rolls together with the optical film underneath (for example, using a plastic encapsulation process) until the entire light panel covers the optical film. The panel is then cut lengthwise, leaving the optical film approximately 1 mm longer than the light panel. Finally, the excess optical film is trimmed off the four edges of the panel, ensuring the edges of the optical film are flush with the edges of the light panel.

[0124] It can be understood that the integrally coated optical film is larger than the light-emitting side of the covered light board by a certain size, and then cut to be flush with the side of the light board.

[0125] In some embodiments, step S140 includes:

[0126] A degassing process is performed between the optical film 120 and the lamp board unit 111 at a preset pressure and a preset temperature.

[0127] By adopting the degassing treatment, the bubbles between the optical film 120 and the light board unit 111 are discharged, thereby ensuring that the optical film 120 and the light board unit 111 are fully covered and adhered.

[0128] In some embodiments, the preset pressure and / or the preset temperature is proportional to the thickness of the optical film 120 .

[0129] In some embodiments, the preset pressure P, the preset temperature T, the maximum size L of the optical film 120, the thickness D0 of the optical film 120, and the degassing rate V satisfy the following formula:

[0130] V=Q×(P×T) / (D0×L)

[0131] Among them, Q is an empirical constant; Q can be selected according to the specific process.

[0132] The above description is only an illustration of some preferred embodiments of the present application and the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features and the technical features with similar functions disclosed in the embodiments of the present application (but not limited to) are replaced with each other to form a technical solution.

Claims

1. A display panel, characterized in that: include: A light panel having a light emitting side and comprising a plurality of light panel units spliced together; At least one optical film covering the entire light-emitting side; Wherein, each of the optical films covers at least two of the light board units; The optical film comprises: an AG layer, a base layer and a back adhesive layer; The adhesive layer is bonded to the light-emitting side surface of the light board, and the base layer is sandwiched between the AG layer and the adhesive layer; The thickness of the AG layer ranges from 5 microns to 10 microns; the thickness of the base layer ranges from 20 microns to 100 microns; and the thickness of the adhesive layer ranges from 30 microns to 120 microns.

2. The display panel according to claim 1, wherein: Each of the light board units has a light emitting surface, and the light emitting surface of each of the light board units is flush with the light emitting surface of the adjacent light board units.

3. The display panel according to claim 2, wherein: Each of the light board units further comprises a plurality of side surfaces connected to the light emitting surface and connected end to end along the circumference of the light board unit. For any two adjacent light board units, the two side surfaces arranged opposite to each other abut against each other.

4. The display panel according to any one of claims 1 to 3, characterized in that: The thickness of the optical film ranges from 80 micrometers to 150 micrometers.

5. The display panel according to claim 4, wherein: The number of the light board units covered by each optical film ranges from 2 to 300.

6. The display panel according to claim 4, wherein: The aspect ratio of the optical film ranges from 1.1 to 2.

5.

7. The display panel according to claim 6, wherein: The number of the optical film is one, and the format size of the optical film is the same as the format size of the light board.

8. The display panel according to claim 6, wherein: The display panel includes a plurality of optical films, which are spliced together, and the size of the spliced optical films is the same as the size of the light board.

9. The display panel according to claim 8, wherein: At least some of the plurality of optical films have different sizes, and the size of the optical film located in the middle of the light board is larger than the size of the optical film located around the light board.

10. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 9.

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