Display device and manufacturing method

Abstract

According to the display device and the manufacturing method, a first adhesive layer is arranged on the surface of the side, close to a cover plate, of a display panel, a second adhesive layer is arranged on the surface of the side, close to the display panel, of the cover plate, and a part of the second adhesive layer at least covers a part of an ink layer; the second adhesive layer is fixed with the first adhesive layer; the first adhesive layer is arranged on the cover plate, namely the second adhesive layer is also arranged on the cover plate, and the cover plate and the display panel are fixed by arranging the first adhesive layer and the second adhesive layer respectively, so that the second adhesive layer can be connected with the ink more tightly, and the problem of bubbles caused by a gap between the optical adhesive and the shading ink is solved; compared with a traditional scheme that the cover plate is fixed to the display panel through optical cement on the display panel, the problem of bubbles caused by the printing ink segment difference does not need to be solved by increasing the thickness of the optical cement, and therefore the thickness of the display device is reduced.

Description

Technical Field

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

[0002] refer to Figure 1 A conventional organic light-emitting display device includes a display panel 01, a cover plate 02, and a light-shielding ink 03. The cover plate 02 is bonded and fixed to the display panel 01 by an optical glue 04 pre-set on the display panel 01. The light-shielding ink 03 is set in the border area of ​​the organic light-emitting display device to prevent light leakage. However, due to the step difference between the optical glue 04 and the light-shielding ink 03, there is a gap between the optical glue 04 and the light-shielding ink 03, which easily leads to the generation of bubbles. Summary of the invention

[0003] Embodiments of the present application provide a display device and a manufacturing method thereof to improve the bubble problem of the display device.

[0004] In a first aspect, an embodiment of the present application provides a display device, including a display portion and a frame portion, and the display device further includes:

[0005] Display panel;

[0006] A cover plate, the cover plate being arranged on the light emitting side of the display panel;

[0007] A first adhesive layer, the first adhesive layer is provided on a surface of the display panel on a side close to the cover plate;

[0008] An ink layer, the ink layer being disposed on a surface of the cover plate on a side close to the display panel, and the ink layer being located on the frame portion;

[0009] A second adhesive layer, wherein the second adhesive layer is disposed on a surface of the cover plate on a side close to the display panel, a portion of the second adhesive layer at least covers a portion of the ink layer, the second adhesive layer is fixed to the first adhesive layer, and a portion of the second adhesive layer exceeds an edge of the first adhesive layer, or a portion of the first adhesive layer exceeds an edge of the second adhesive layer.

[0010] Further, the ink layer includes two light shielding parts, the two light shielding parts respectively correspond to the two frame parts on the opposite sides of the display device, and the two light shielding parts are arranged opposite to each other, and a groove is formed between the two light shielding parts, and the second adhesive layer includes a first adhesive part and a second adhesive part, and a part of the first adhesive part is filled in the groove;

[0011] Wherein, in a top view of the display device, the groove overlaps with the display portion and the first adhesive portion, and the second adhesive portion covers a portion of the ink layer.

[0012] Furthermore, the thickness of the first adhesive portion is greater than the thickness of the second adhesive portion.

[0013] Furthermore, the area of ​​the opening of the groove away from the cover plate is larger than the area of ​​the opening of the groove close to the groove.

[0014] Furthermore, the sum of the thickness of the first adhesive layer and the thickness of the second adhesive layer is 10 um to 50 um.

[0015] Furthermore, the thickness of the first adhesive layer is not less than 5 um, the thickness of the second adhesive layer is not less than 5 um, and the thickness of the second adhesive layer is greater than the thickness of the ink layer.

[0016] Furthermore, the refractive index of the first adhesive layer is not less than 1.58, the refractive index of the second adhesive layer is not less than 1.48, and the refractive index of the first adhesive layer is greater than the refractive index of the second adhesive layer.

[0017] Furthermore, the ratio of the refractive index of the second adhesive layer to the refractive index of the cover plate is 0.95 to 1.05.

[0018] Furthermore, the first adhesive layer is filled with high refractive index particles, and the second adhesive layer is filled with UV light absorbing particles.

[0019] In a second aspect, an embodiment of the present application provides a method for manufacturing a display device, wherein the display device includes a display portion and a frame portion, and the manufacturing method includes:

[0020] preparing optically transparent glue on the light-emitting surface of the display panel, and curing the optically transparent glue to form a first adhesive layer on the display panel;

[0021] Making an ink layer on the cover plate, wherein the ink layer is located on the frame portion;

[0022] Making optically transparent glue on the cover plate and the ink layer, and curing the optically transparent glue to form a second adhesive layer on the cover plate, wherein the second adhesive layer covers a portion of the ink layer;

[0023] The cover plate is turned over, and the second adhesive layer is fixed to the first adhesive layer, so that the cover plate is fixed to the display panel.

[0024] Beneficial effects of this application:

[0025] The present application provides a display device, wherein the first adhesive layer is arranged on the surface of the display panel on the side close to the cover plate, and the second adhesive layer is arranged on the surface of the cover plate on the side close to the display panel, a part of the second adhesive layer at least covers a part of the ink layer, the second adhesive layer is fixed to the first adhesive layer, and a part of the second adhesive layer exceeds the edge of the first adhesive layer, or a part of the first adhesive layer exceeds the edge of the second adhesive layer; that is, the second adhesive layer is also arranged on the cover plate, and the cover plate and the display panel are fixed by respectively arranging the first adhesive layer and the second adhesive layer, so that the second adhesive layer can be more closely connected with the ink, thereby improving the problem of bubbles caused by the gap between the optical glue and the light-shielding ink; at the same time, compared with the traditional solution of fixing the cover plate to the display panel by the optical glue pre-arranged on the display panel, there is no need to increase the thickness of the optical glue to solve the problem of bubbles caused by the ink step difference, thereby achieving the reduction of the thickness of the display device.

[0026] The present application provides a method for manufacturing a display device, wherein an optically transparent glue is prepared on a light-emitting surface of a display panel, and the optically transparent glue is cured to form a first adhesive layer on the display panel; an optically transparent glue is prepared on the cover plate and the ink layer, and the optically transparent glue is cured to form a second adhesive layer on the cover plate, wherein the second adhesive layer covers a portion of the ink layer; the cover plate is turned over, and the second adhesive layer is fixed to the first adhesive layer to fix the cover plate to the display panel; that is, a second adhesive layer is also provided on the cover plate, and the cover plate and the display panel are fixed by respectively providing the first adhesive layer and the second adhesive layer, so that the second adhesive layer can be more closely connected with the ink, thereby improving the problem of bubbles caused by the gap between the optical glue and the light-shielding ink; at the same time, compared with the traditional solution of fixing the cover plate to the display panel by the optical glue pre-set on the display panel, it is not necessary to solve the problem of bubbles caused by the ink step difference by increasing the thickness of the optical glue, thereby achieving a thinning of the thickness of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a conventional display device;

[0028] Figure 2 is a schematic diagram of a display device of the present application;

[0029] Figure 3 yes Figure 2 A cross-sectional view of a first structure of the display device at position AA′ shown;

[0030] Figure 4 yes Figure 2 A cross-sectional view of a second structure of the display device at position AA′ shown;

[0031] Figure 5 yes Figure 2 A third structural cross-sectional view of the display device at position AA′ shown;

[0032] Figure 6 yes Figure 2 A fourth structural cross-sectional view of the display device at position AA′ shown;

[0033] Figure 7 yes Figure 2 A fifth structural cross-sectional view of the display device at position AA′ shown;

[0034] Figure 8a to Figure 8d It is a flow chart of the method for manufacturing the display device in the present application.

[0035] 100 - display panel; 200 - cover plate; 300 - first adhesive layer; 400 - ink layer, 410 - light shielding part; 500 - second adhesive layer, 510 - first adhesive part, 520 - second adhesive part; 600 - groove.

[0036] 01-display panel; 02-cover plate; 03-light-shielding ink; 04-optical adhesive DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The technical solutions described below are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0038] In addition, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise clearly defined.

[0039] The first embodiment of the present application provides a display device, referring to Figure 2 , Figure 3 and Figure 4The display device 10 includes a display portion AA and a frame portion BB, and the display device also includes a display panel 100, a cover plate 200, a first adhesive layer 300, an ink layer 400 and a second adhesive layer 500; the cover plate 200 is arranged on the light emitting side of the display panel 100; the first adhesive layer 300 is arranged on the surface of the display panel 100 close to the cover plate 200; the ink layer 400 is arranged on the surface of the cover plate 200 close to the display panel 100, and the ink layer 400 is located in the frame portion BB; the second adhesive layer 500 is arranged on the surface of the cover plate 200 close to the display panel 100, a part of the second adhesive layer 500 at least covers a part of the ink layer 400, the second adhesive layer 500 is fixed to the first adhesive layer 300, and a part of the second adhesive layer 500 exceeds the edge of the first adhesive layer 300, or a part of the first adhesive layer 300 exceeds the edge of the second adhesive layer 500.

[0040] The first adhesive layer 300 is arranged on the surface of the display panel 100 on the side close to the cover plate 200, and the second adhesive layer 500 is arranged on the surface of the cover plate 200 on the side close to the display panel 100, a part of the second adhesive layer 500 at least covers a part of the ink layer 400, the second adhesive layer 500 is fixed to the first adhesive layer 300, and a part of the second adhesive layer 500 exceeds the edge of the first adhesive layer 300, or a part of the first adhesive layer 300 exceeds the edge of the second adhesive layer 500; that is, the second adhesive layer 500 is also arranged on the cover plate 200, and the cover plate 200 and the display panel 100 are respectively provided with the second adhesive layer 500. The first adhesive layer 300 and the second adhesive layer 500 are fixed so that the second adhesive layer 500 can be more closely connected with the ink, thereby improving the problem of bubbles caused by the gap between the optical glue and the light-shielding ink. At the same time, compared with the traditional solution of fixing the cover plate 200 to the display panel 100 by optical glue pre-set on the display panel 100, there is no need to increase the thickness of the optical glue to solve the problem of bubbles caused by the ink step difference, thereby achieving a thinning of the display device; and since the first adhesive layer 300 and the second adhesive layer 500 are set, the first adhesive layer 300 and the second adhesive layer 500 can be filled with different optical particles during preparation, thereby enhancing the diversity of the functions of the display device.

[0041] In this embodiment, reference Figure 3 , Figure 4The ink layer 400 includes two shading portions 410, the two shading portions 410 respectively correspond to the two frame portions BB on the opposite sides of the display device, and the two shading portions 410 are arranged opposite to each other, and a groove 600 is formed between the two shading portions 410, and the second adhesive layer 500 includes a first adhesive portion 510 and a second adhesive portion 520, and a portion of the first adhesive portion 510 is filled in the groove 600; wherein, in the top view of the display device, the groove 600 overlaps with the display portion AA and the first adhesive portion 510, and the second adhesive portion 520 covers a portion of the ink layer 400. The second adhesive layer 500 includes a first adhesive portion 510 and a second adhesive portion 520, a portion of the first adhesive portion 510 is filled in the groove 600, the groove 600 overlaps with the display portion AA and the first adhesive portion 510, and the second adhesive portion 520 covers a portion of the ink layer 400, so that the ink layer 400 can block the edge of the second adhesive portion 520, thereby reducing the visibility of the edge of the second adhesive portion 520 and improving the visual effect of the display device.

[0042] In this embodiment, the ink layer 400 includes two shading portions 410, the two shading portions 410 respectively correspond to the two frame portions BB on the opposite sides of the display device, and the two shading portions 410 are arranged opposite to each other, and a groove 600 is formed between the two shading portions 410, and the second adhesive layer 500 includes a first adhesive portion 510 and a second adhesive portion 520, and a portion of the first adhesive portion 510 is filled in the groove 600; wherein, in the top view of the display device, the groove 600 overlaps with the display portion AA and the first adhesive portion 510, and the second adhesive portion 520 covers the ink layer 400.

[0043] In this embodiment, the surface of the first adhesive portion 510 close to the display panel 100 is flush with the surface of the second adhesive portion 520 close to the display panel 100. By setting the surface of the first adhesive portion 510 close to the display panel 100 and the surface of the second adhesive portion 520 close to the display panel 100 to be flush, the bonding surface of the first adhesive layer 300 and the second adhesive layer 500 is more flat.

[0044] In this embodiment, reference Figure 5 , a thickness a of the first adhesive portion 510 is greater than a thickness b of the second adhesive portion 520 .

[0045] In this embodiment, reference Figure 5 , the sum of the thickness b of the second adhesive portion 520 and the thickness d of the ink is equal to the thickness a of the first adhesive portion 510 .

[0046] In this embodiment, reference Figure 5 , an opening area S1 of the side of the slot 600 away from the cover plate 200 is larger than an opening area S2 of the side of the slot 600 close to the slot 600 .

[0047] In this embodiment, reference Figure 5 , the side wall of the groove 600 is an inclined surface.

[0048] In this embodiment, reference Figure 6 and Figure 7 , the side wall of the groove 600 is an arc surface.

[0049] In this embodiment, reference Figure 6 The side wall of the slot 600 is an arc-shaped concave surface, and the center of curvature of the arc-shaped concave surface is located on the same side as the center of the slot.

[0050] In this embodiment, reference Figure 7 The side wall of the slot 600 is an arc-shaped convex surface, and the center of curvature of the arc-shaped convex surface and the center of the slot are located on different sides.

[0051] In this embodiment, the sum of the thickness c of the first adhesive layer 300 and the thickness a of the second adhesive layer 500 is 10um to 50um. By setting the sum of the thickness c of the first adhesive layer 300 and the thickness a of the second adhesive layer 500 to 10um to 50um, compared with the conventional solution that requires the thickness of the adhesive layer to be set to not less than 100um, the technical solution of the present application does not need to set a thicker optical adhesive layer to improve the problem of bubbles caused by the ink step difference, so the total thickness of the thickness c of the first adhesive layer 300 and the thickness a of the second adhesive layer 500 is thinned compared with the conventional solution, thereby achieving a thinning of the thickness of the display device.

[0052] In this embodiment, the thickness d of the ink layer 400 is 2um-3um. Preferably, the thickness of the ink layer 400 is 2.1um, 2.2um, 2.3um, 2.4um, 2.5um, 2.6um, 2.7um, 2.8um, 2.9um, or 3.0um.

[0053] In this embodiment, reference Figure 5, the thickness c of the first adhesive layer 300 is not less than 5um, the thickness a of the second adhesive layer 500 is not less than 5um, and the thickness a of the second adhesive layer 500 is greater than the thickness d of the ink layer 400. By setting the thickness a of the second adhesive layer 500 to be not less than 5um, and the thickness a of the second adhesive layer 500 to be greater than the thickness d of the ink layer 400, on the one hand, it is ensured that a part of the second adhesive layer 500 can cover the ink layer 400, and on the other hand, it is ensured that the first adhesive layer 300 and the second adhesive layer 500 can have sufficient viscosity to achieve fixation, thereby ensuring the stability of the connection between the cover plate 200 and the display panel 100. Preferably, the thickness of the first adhesive layer 300 is 5um, 6um, 7um, 8um, 9um, 10um, 11um, 12um, 13um, 14um or 15um, and the thickness a of the second adhesive layer 500 is 5um, 6um, 7um, 8um, 9um, 10um, 11um, 12um, 13um, 14um or 15um.

[0054] In this embodiment, reference Figure 5 , the thickness c of the first adhesive layer 300 is consistent with the thickness a of the second adhesive layer 500 .

[0055] In this embodiment, there is a spacing e or a spacing f between the edge of the second adhesive layer and the edge of the first adhesive layer, and the length of the spacing e is not greater than 150um. Preferably, the length of the spacing e is 110um, 120um, 130um, 140um or 150um.

[0056] It should be noted that since the second adhesive layer 500 and the first adhesive layer 300 are connected by bonding, there is a step difference in the bonding accuracy between the second adhesive layer 500 and the first adhesive layer 300, that is, there is a spacing e or a spacing f between the edge of the second adhesive layer and the edge of the first adhesive layer.

[0057] In this embodiment, the refractive index of the first adhesive layer 300 is not less than 1.58, the refractive index of the second adhesive layer 500 is not less than 1.48, and the refractive index of the first adhesive layer 300 is greater than the refractive index of the second adhesive layer 500. By setting the refractive index of the first adhesive layer 300 to be not less than 1.58, the refractive index of the second adhesive layer 500 to be not less than 1.48, and the refractive index of the first adhesive layer 300 to be greater than the refractive index of the second adhesive layer 500, the light efficiency of the display device can be guaranteed, and the problem of reduced light extraction efficiency of the display device caused by the refractive index of the first adhesive layer 300 being less than the refractive index of the second adhesive layer 500 can be avoided. Preferably, the refractive index of the first adhesive layer 300 is 1.58, 1.59, 1.60, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.67 or 1.68, and the refractive index of the second adhesive layer 500 is 1.48, 1.49, 1.50, 1.51 or 1.52.

[0058] In this embodiment, the ratio of the refractive index of the second adhesive layer 500 to the refractive index of the cover plate 200 is 0.95 to 1.05. Preferably, the ratio of the refractive index of the second adhesive layer 500 to the refractive index of the cover plate 200 is 0.95, 0.96, 0.97, 0.98, 0.99, 1, 1.01, 1.02, 1.03, 1.04 or 1.05.

[0059] In this embodiment, the first adhesive layer 300 is filled with high refractive index particles, and the second adhesive layer 500 is filled with UV light absorbing particles. By filling the first adhesive layer 300 with high refractive index particles and the second adhesive layer 500 with UV light absorbing particles, on the one hand, the refractive index of the first adhesive layer 300 can be improved, thereby ensuring the light extraction efficiency of the display device, and on the other hand, the UV light absorbing particles in the second adhesive layer 500 can absorb UV light, preventing UV from passing through the first adhesive layer 300 and the second adhesive layer 500 into the display panel 100 and causing damage to the electronic components of the display panel 100, thereby improving the working stability of the display device.

[0060] The second embodiment of the present application provides a method for manufacturing a display device, referring to Figure 8a-8d The display device includes a display portion AA and a frame portion BB, and the manufacturing method includes:

[0061] S100: preparing optically transparent glue on the light-emitting surface of the display panel 100, and curing the optically transparent glue to form a first adhesive layer 300 on the display panel 100;

[0062] S200: forming an ink layer 400 on the cover plate 200, wherein the ink layer 400 is located on the frame portion BB;

[0063] S300: preparing optically transparent glue on the cover plate 200 and the ink layer 400, and curing the optically transparent glue to form a second adhesive layer 500 on the cover plate 200, wherein the second adhesive layer 500 covers a portion of the ink layer 400;

[0064] S400 : turning over the cover plate 200 , and fixing the second adhesive layer 500 to the first adhesive layer 300 , so as to fix the cover plate 200 to the display panel 100 .

[0065] Optically transparent glue is prepared on the light-emitting surface of the display panel 100, and the optically transparent glue is cured to form a first adhesive layer 300 on the display panel 100; optically transparent glue is prepared on the cover plate 200 and the ink layer 400, and the optically transparent glue is cured to form a second adhesive layer 500 on the cover plate 200, wherein the second adhesive layer 500 covers a portion of the ink layer 400; the cover plate 200 is turned over, and the second adhesive layer 500 is fixed to the first adhesive layer 300, so that the cover plate 200 is fixed to the display panel 100, and the first adhesive layer 300 is fixed to the second adhesive layer 500. The sum of the thicknesses of the layers 500 is 10um to 50um; that is, a second adhesive layer 500 is also provided on the cover plate 200, and the cover plate 200 and the display panel 100 are fixed by respectively providing a first adhesive layer 300 and a second adhesive layer 500, so that the second adhesive layer 500 can be more closely connected with the ink, thereby improving the problem of bubbles caused by the gap between the optical glue and the light-shielding ink; at the same time, compared with the conventional solution of fixing the cover plate 200 to the display panel 100 by means of optical glue pre-disposed on the display panel 100, there is no need to increase the thickness of the optical glue to solve the problem of bubbles caused by the ink step difference, thereby achieving a thinning of the thickness of the display device.

[0066] It should be noted that, in this embodiment, step S100 may be performed first, and then steps S200 and S300; or steps S200 and S300 may be performed first, and then step S100; in other embodiments, steps S100 and S200 may be performed simultaneously, or step S200 may be performed first, and then steps S100 and S300 may be performed simultaneously.

[0067] In this embodiment, in step S100 , UV light is used to cure the optically transparent glue formed on the light emitting surface of the display panel 100 , so as to form a first adhesive layer 300 on the display panel 100 .

[0068] In this embodiment, in step S300 , UV light is used to cure the optically transparent glue formed on the cover plate 200 , so as to form a first adhesive layer 300 on the display panel 100 .

[0069] In this embodiment, in step 400 , UV light is used to completely cure and fix the second adhesive layer 500 and the first adhesive layer 300 , so that the cover plate 200 and the display panel 100 are fixed.

[0070] In step S400, the wavelength of the UV light used is not less than 395 nm.

[0071] In this embodiment, reference Figure 3 The ink layer 400 includes two shading portions 410, the two shading portions 410 respectively correspond to the two frame portions BB on the opposite sides of the display device, and the two shading portions 410 are arranged opposite to each other, and a groove 600 is formed between the two shading portions 410, and the second adhesive layer 500 includes a first adhesive portion 510 and a second adhesive portion 520, and a portion of the first adhesive portion 510 is filled in the groove 600; wherein, in the top view of the display device, the groove 600 overlaps with the display portion AA and the first adhesive portion 510, and the second adhesive portion 520 covers a portion of the ink layer 400. The second adhesive layer 500 includes a first adhesive portion 510 and a second adhesive portion 520, a portion of the first adhesive portion 510 is filled in the groove 600, the groove 600 overlaps with the display portion AA and the first adhesive portion 510, and the second adhesive portion 520 covers a portion of the ink layer 400, so that the ink layer 400 can block the edge of the second adhesive portion 520, thereby reducing the visibility of the edge of the second adhesive portion 520 and improving the visual effect of the display device.

[0072] In this embodiment, the surface of the first adhesive portion 510 close to the display panel 100 is flush with the surface of the second adhesive portion 520 close to the display panel 100. By setting the surface of the first adhesive portion 510 close to the display panel 100 and the surface of the second adhesive portion 520 close to the display panel 100 to be flush, the bonding surface of the first adhesive layer 300 and the second adhesive layer 500 is more flat.

[0073] In this embodiment, reference Figure 5 , a thickness a of the first adhesive portion 510 is greater than a thickness b of the second adhesive portion 520 .

[0074] In this embodiment, reference Figure 5, the sum of the thickness b of the second adhesive portion 520 and the thickness d of the ink is equal to the thickness a of the first adhesive portion 510 .

[0075] In this embodiment, reference Figure 5 , an opening area S1 of the side of the slot 600 away from the cover plate 200 is larger than an opening area S2 of the side of the slot 600 close to the slot 600 .

[0076] In this embodiment, reference Figure 5 , the side wall of the groove 600 is an inclined surface.

[0077] In this embodiment, reference Figure 6 and Figure 7 , the side wall of the groove 600 is an arc surface.

[0078] In this embodiment, reference Figure 6 The side wall of the slot 600 is an arc-shaped concave surface, and the center of curvature of the arc-shaped concave surface and the center of the slot are located on the same side.

[0079] In this embodiment, reference Figure 7 The side wall of the slot 600 is an arc-shaped convex surface, and the center of curvature of the arc-shaped convex surface and the center of the slot are located on different sides.

[0080] In this embodiment, the sum of the thickness c of the first adhesive layer 300 and the thickness a of the second adhesive layer 500 is 10um to 50um. By setting the sum of the thickness c of the first adhesive layer 300 and the thickness a of the second adhesive layer 500 to 10um to 50um, compared with the conventional solution that requires the thickness of the adhesive layer to be set to not less than 100um, the technical solution of the present application does not need to set a thicker optical adhesive layer to improve the problem of bubbles caused by the ink step difference, so the total thickness of the thickness c of the first adhesive layer 300 and the thickness a of the second adhesive layer 500 is thinned compared with the conventional solution, thereby achieving a thinning of the thickness of the display device.

[0081] In this embodiment, the thickness d of the ink layer 400 is 2um-3um. Preferably, the thickness of the ink layer 400 is 2.1um, 2.2um, 2.3um, 2.4um, 2.5um, 2.6um, 2.7um, 2.8um, 2.9um, or 3.0um.

[0082] In this embodiment, reference Figure 5, the thickness c of the first adhesive layer 300 is not less than 5um, the thickness a of the second adhesive layer 500 is not less than 5um, and the thickness a of the second adhesive layer 500 is greater than the thickness of the ink layer 400. By setting the thickness a of the second adhesive layer 500 to be not less than 5um, and the thickness a of the second adhesive layer 500 to be greater than the thickness d of the ink layer 400, on the one hand, it is ensured that a part of the second adhesive layer 500 can cover the ink layer 400, and on the other hand, it is ensured that the first adhesive layer 300 and the second adhesive layer 500 can have sufficient viscosity to achieve fixation, thereby ensuring the stability of the connection between the cover plate 200 and the display panel 100. Preferably, the thickness d of the ink layer 400 is 2.1um, 2.2um, 2.3um, 2.4um, 2.5um, 2.6um, 2.7um, 2.8um, 2.9um, or 3.0um, the thickness c of the first adhesive layer 300 is 5um, 6um, 7um, 8um, 9um, 10um, 11um, 12um, 13um, 14um, or 15um, and the thickness a of the second adhesive layer 500 is 5um, 6um, 7um, 8um, 9um, 10um, 11um, 12um, 13um, 14um, or 15um.

[0083] In this embodiment, reference Figure 5 , the thickness c of the first adhesive layer 300 is consistent with the thickness a of the second adhesive layer 500 .

[0084] In this embodiment, there is a distance e between the edge of the second adhesive layer 500 and the edge of the first adhesive layer 300, and the length of the distance e is not greater than 150um. Preferably, the length of the distance e is 110um, 120um, 130um, 140um or 150um.

[0085] It should be noted that since the second adhesive layer 500 and the first adhesive layer 300 are connected by laminating, there is a step difference in the laminating accuracy between the second adhesive layer 500 and the first adhesive layer 300, that is, there is a distance e between the edge of the second adhesive layer and the edge of the first adhesive layer.

[0086] In this embodiment, the refractive index of the first adhesive layer 300 is not less than 1.58, the refractive index of the second adhesive layer 500 is not less than 1.48, and the refractive index of the first adhesive layer 300 is greater than the refractive index of the second adhesive layer 500. By setting the refractive index of the first adhesive layer 300 to be not less than 1.58, the refractive index of the second adhesive layer 500 to be not less than 1.48, and the refractive index of the first adhesive layer 300 to be greater than the refractive index of the second adhesive layer 500, the light efficiency of the display device can be guaranteed, and the problem of reduced light extraction efficiency of the display device caused by the refractive index of the first adhesive layer 300 being less than the refractive index of the second adhesive layer 500 can be avoided. Preferably, the refractive index of the first adhesive layer 300 is 1.58, 1.59, 1.60, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.67 or 1.68, and the refractive index of the second adhesive layer 500 is 1.48, 1.49, 1.50, 1.51 or 1.52.

[0087] In this embodiment, the ratio of the refractive index of the second adhesive layer 500 to the refractive index of the cover plate 200 is 0.95 to 1.05. Preferably, the ratio of the refractive index of the second adhesive layer 500 to the refractive index of the cover plate 200 is 0.95, 0.96, 0.97, 0.98, 0.99, 1, 1.01, 1.02, 1.03, 1.04 or 1.05.

[0088] In this embodiment, the first adhesive layer 300 is filled with high refractive index particles, and the second adhesive layer 500 is filled with UV light absorbing particles. By filling the first adhesive layer 300 with high refractive index particles and the second adhesive layer 500 with UV light absorbing particles, on the one hand, the refractive index of the first adhesive layer 300 can be improved, thereby ensuring the light extraction efficiency of the display device, and on the other hand, the UV light absorbing particles in the second adhesive layer 500 can absorb UV light, preventing UV from passing through the first adhesive layer 300 and the second adhesive layer 500 into the display panel 100 and causing damage to the electronic components of the display panel 100, thereby improving the working stability of the display device.

[0089] The above is a detailed description of the specific implementation of the present application. The above implementation disclosed in the present application is only the preferred implementation of the present application. For ordinary technicians in this field, many modifications and improvements can be made without departing from the concept of the present application. These modifications and improvements all fall within the scope of protection defined by the claims of the present application.

Claims

1. A display device, characterized in that: The display device comprises a display portion and a frame portion, and the display device further comprises: Display panel; A cover plate, the cover plate being arranged on the light emitting side of the display panel; A first adhesive layer, the first adhesive layer is provided on a surface of the display panel on a side close to the cover plate; An ink layer, the ink layer being disposed on a surface of the cover plate on a side close to the display panel, and the ink layer being located on the frame portion; A second adhesive layer, wherein the second adhesive layer is disposed on a surface of the cover plate on a side close to the display panel, a portion of the second adhesive layer at least covers a portion of the ink layer, the second adhesive layer is fixed to the first adhesive layer, and a portion of the second adhesive layer exceeds an edge of the first adhesive layer, or a portion of the first adhesive layer exceeds an edge of the second adhesive layer.

2. The display device according to claim 1, characterized in that The ink layer includes two light shielding parts, the two light shielding parts respectively correspond to the two frame parts on the opposite sides of the display device, and the two light shielding parts are arranged opposite to each other, and a groove is formed between the two light shielding parts, and the second adhesive layer includes a first adhesive part and a second adhesive part, and a part of the first adhesive part is filled in the groove; Wherein, in a top view of the display device, the groove overlaps with the display portion and the first adhesive portion, and the second adhesive portion covers a portion of the ink layer.

3. The display device according to claim 2, characterized in that: The thickness of the first adhesive portion is greater than the thickness of the second adhesive portion.

4. The display device according to claim 2, characterized in that: The opening area of ​​the groove away from the cover plate is larger than the opening area of ​​the groove close to the groove.

5. The display device according to claim 1, characterized in that The sum of the thickness of the first adhesive layer and the thickness of the second adhesive layer is 10 um to 50 um.

6. The display device according to claim 1, characterized in that: The thickness of the first adhesive layer is not less than 5 um, the thickness of the second adhesive layer is not less than 5 um, and the thickness of the second adhesive layer is greater than the thickness of the ink layer.

7. The display device according to claim 1, characterized in that: The refractive index of the first adhesive layer is not less than 1.58, the refractive index of the second adhesive layer is not less than 1.48, and the refractive index of the first adhesive layer is greater than the refractive index of the second adhesive layer.

8. The display device according to claim 7, characterized in that: The ratio of the refractive index of the second adhesive layer to the refractive index of the cover plate is 0.95-1.

05.

9. The display device according to claim 1, characterized in that: The first adhesive layer is filled with high refractive index particles, and the second adhesive layer is filled with UV light absorbing particles.

10. A method for manufacturing a display device, characterized in that: The display device includes a display portion and a frame portion, and the manufacturing method includes: preparing optically transparent glue on the light-emitting surface of the display panel, and curing the optically transparent glue to form a first adhesive layer on the display panel; Making an ink layer on the cover plate, wherein the ink layer is located on the frame portion; Making optically transparent glue on the cover plate and the ink layer, and curing the optically transparent glue to form a second adhesive layer on the cover plate, wherein the second adhesive layer covers a portion of the ink layer; The cover plate is turned over, and the second adhesive layer is fixed to the first adhesive layer, so that the cover plate is fixed to the display panel.

Images