Display screen and display device

Abstract

The invention relates to a display screen and a display device. The display screen comprises an array substrate; the pixel limiting layer is located on one side of the array substrate; the black matrix is located on the side, away from the array substrate, of the pixel limiting layer, and a plurality of slits penetrating in the thickness direction of the array substrate are formed in the black matrix. According to the display screen adopting the technical scheme, the plurality of slits penetrating in the thickness direction of the array substrate are formed in the black matrix, and after being reflected by the electrode close to one side of the array substrate, external environment incident light is diffracted and dispersed into stripes through the slits, so that the area of a light emitting area can be increased in the visual effect, and the light emitting efficiency is improved. The bad screen window effect is effectively weakened; and meanwhile, optical crosstalk between adjacent sub-pixels can be inhibited, and the overall reflection intensity is further reduced.

Description

Technical Field

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

[0002] OLED (Organic Light Emitting Diode) is widely used in the display field due to its thinness, self-luminescence and fast response speed. At present, OLED display products generally have low resolution. If used in near-eye displays such as VR (Virtual Reality), due to the special optical path structure of near-eye display products, it is easy to produce a screen door effect during use, affecting the user experience. Summary of the invention

[0003] Based on this, it is necessary to provide a display screen and a display device to reduce the problem of poor screen window effect.

[0004] A display screen, comprising:

[0005] An array substrate;

[0006] a pixel defining layer, located on one side of the array substrate; and

[0007] The black matrix is ​​located on a side of the pixel defining layer away from the array substrate, and a plurality of slits penetrating along a thickness direction of the array substrate are arranged in the black matrix.

[0008] In the display screen using the technical solution of the present invention, a plurality of slits penetrating along the thickness direction of the array substrate are provided in the black matrix. After the incident light from the external environment is reflected by the electrode close to one side of the array substrate, it is diffracted by the above-mentioned slits and dispersed into stripes. Therefore, the area of ​​the luminous area can be increased in visual effect, and the adverse screen window effect can be effectively reduced.

[0009] In a feasible implementation, a surface of the pixel defining layer away from the array substrate is provided with a groove;

[0010] Preferably, the projection of the groove on the array substrate is located within the outer contour of the projection of the black matrix on the array substrate;

[0011] Preferably, the refractive index of the pixel defining layer is 1.5-1.6.

[0012] In a feasible implementation, the maximum opening width of the groove is 1.5 μm to 2 μm, and the depth of the groove along the thickness direction of the display screen is 0.5 μm to 1 μm;

[0013] Preferably, the cross-sectional shape of the groove along the thickness direction of the display screen is V-shaped, U-shaped or inverted trapezoidal.

[0014] In a feasible implementation, the display screen further includes an optical film layer, and the optical film layer is coated on a side of the black matrix away from the array substrate;

[0015] Preferably, the transmittance of the optical film layer is 50% to 80%;

[0016] Preferably, the material of the optical film layer includes a mixture of one or more of organic glue, inorganic non-metallic material, metal and metal oxide;

[0017] The inorganic non-metallic material includes a mixture of one or more of silicon nitride and silicon oxide;

[0018] The metal comprises a mixture of one or more of silver, aluminum and molybdenum;

[0019] The metal oxide includes a mixture of one or more of silver oxide, aluminum oxide and molybdenum oxide.

[0020] In a feasible implementation, the display screen also includes a color filter, the color filter and the black matrix are located in the same layer, and the color filter is adjacent to the black matrix, and the optical film layer is coated on a side of the color filter and the black matrix away from the array substrate.

[0021] In a feasible implementation, the thickness of the color filter is ≤1 μm.

[0022] In a feasible implementation, the color filter includes a red filter and a green filter, and the thickness of the red filter is smaller than the thickness of the green filter;

[0023] Preferably, the thickness of the red filter is 0.3 μm to 0.5 μm, and the thickness of the green filter is 0.5 μm to 1 μm.

[0024] In a feasible implementation, the display screen further includes:

[0025] A first electrode is located in a pixel opening of the pixel defining layer;

[0026] A pixel unit, located in a pixel opening of the pixel defining layer;

[0027] a thin film encapsulation layer, located between the pixel defining layer and the black matrix; and

[0028] A cover plate, located at a side of the optical film layer away from the array substrate;

[0029] Preferably, the first electrode is an anode or a cathode.

[0030] A display device comprises any one of the above display screens.

[0031] A display device using the technical solution of the present invention includes a display screen, a black matrix is ​​provided with a plurality of slits penetrating along the thickness direction of an array substrate, and incident light from the external environment is reflected by an electrode close to one side of the array substrate and then diffracted by the slits to be dispersed into stripes, thereby visually increasing the area of ​​the luminous region and effectively reducing the adverse screen window effect. At the same time, it also helps to suppress optical crosstalk between adjacent sub-pixels and further reduce the overall reflection intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a cross-sectional view of a display screen according to a first embodiment of the present invention;

[0033] Figure 2 For along Figure 1 A-A' cross-sectional schematic diagram;

[0034] Figure 3 is a cross-sectional view of a display screen according to a second embodiment of the present invention;

[0035] Figure 4 For along Figure 3 A-A' cross-sectional schematic diagram;

[0036] Figure 5 is a cross-sectional view of a display screen according to a third embodiment of the present invention;

[0037] Figure 6 is a cross-sectional view of a display screen according to a fourth embodiment of the present invention;

[0038] Figure 7 is a cross-sectional view of the display screen of Comparative Example 1;

[0039] Figure 8 Schematic diagram of the display effects of the display screens of Example 1 and Comparative Example 1. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] See also Figure 1 and Figure 2 The display screen 100 according to the first embodiment of the present invention includes an array substrate 110 , a pixel defining layer 120 and a black matrix 130 .

[0044] The array substrate 110 includes a substrate 111 and a driving structure layer 112 located on a side of the substrate 111 close to the pixel defining layer 120 .

[0045] The pixel defining layer 120 is located on one side of the array substrate 110 .

[0046] The black matrix 130 is located on a side of the pixel defining layer 120 away from the array substrate 110 , and a plurality of slits 131 penetrating along the thickness direction of the array substrate 110 are disposed in the black matrix 130 .

[0047] In the display screen 100 of this embodiment, a slit is provided in the black matrix 130 and passes through the array substrate 110 in the thickness direction. After the incident light from the external environment is reflected by the electrode close to the array substrate, it is diffracted by the slit. Figure 1 As shown in the middle light path ①, it is dispersed into stripes, so it can increase the area of ​​the luminous area in visual effect and effectively reduce the bad screen effect; Figure 1 As shown in the optical path ②, the light that cannot be emitted from the interface of the thin film encapsulation layer 180 and the color filter 150 is emitted after total reflection through the pixel defining layer 120, and then partially emitted after diffraction through the slits in the black matrix 130, which can effectively improve the light emission efficiency of the display screen 100 and further reduce the light loss of the waveguide effect; at the same time, as shown in the optical path ③, the crosstalk light originally emitted to the adjacent sub-pixels is diffracted and dispersed into stripes after passing through the black matrix 130, which reduces the optical crosstalk between adjacent sub-pixels at high ppi, helps to suppress the optical crosstalk between adjacent sub-pixels, and further reduces the overall reflection intensity.

[0048] On the basis of the aforementioned embodiment, the ratio of the slit area to the non-slit area of ​​the black matrix 130 is 10% to 40%, and the thickness of the black matrix 130 is 0.5μm to 1μm. This slit has a better diffraction effect on light, can disperse the light into stripes, can increase the area of ​​the luminous area in terms of visual effect, effectively reduce the poor screen effect, and at the same time reduce the optical crosstalk between adjacent sub-pixels at high ppi, which helps to suppress the optical crosstalk between adjacent sub-pixels. Further, the ratio of the slit area to the non-slit area of ​​the black matrix 130 can be, but not limited to, 10%, 20%, 30% or 40%, and the thickness of the black matrix 130 can be, but not limited to, 0.5μm, 0.6μm, 0.7μm, 0.8μm, 0.9μm or 1μm.

[0049] On the basis of the above-mentioned embodiment, the display screen 100 further includes an optical film layer (gray-OC) 140, which is coated on the side of the black matrix 130 away from the array substrate 110. The optical film layer 140 is used to further reduce the overall reflectivity. Further, the transmittance of the optical film layer 140 is 50% to 80%. Further, the transmittance of the optical film layer 140 can be but is not limited to 50%, 60%, 70% or 80%. Further, the transmittance of the optical film layer 140 of this embodiment is preferably 60% to 80%.

[0050] Further, the material of the optical film layer 140 includes a mixture of one or more of an organic glue, an inorganic non-metallic material, a metal and a metal oxide. The inorganic non-metallic material includes a mixture of one or more of silicon nitride and silicon oxide. The metal includes a mixture of one or more of silver, aluminum and molybdenum. The metal oxide includes a mixture of one or more of silver oxide, aluminum oxide and molybdenum oxide.

[0051] Based on the above-mentioned embodiment, the display screen 100 also includes a color filter 150, which is located on the same layer as the black matrix 130 and is adjacent to the black matrix 130, and the optical film layer 140 is covered on the side of the color filter 150 and the black matrix 130 away from the array substrate 110.

[0052] On the basis of the above-mentioned embodiment, the thickness of the color filter 150 is ≤1μm. Further, the color filter 150 includes a red filter R-CF and a green filter G-CF, and the thickness of the red filter R-CF is less than the thickness of the green filter G-CF. Further, the thickness of the red filter R-CF is 0.3μm to 0.5μm, and the thickness of the green filter G-CF is 0.5μm to 1μm. The thickness of the red filter R-CF may be, but not limited to, 0.3μm, 0.4μm or 0.5μm, and the thickness of the green filter G-CF may be, but not limited to, 0.5μm, 0.6μm, 0.7μm, 0.8μm, 0.9μm or 1μm.

[0053] The color filter 150 of this embodiment is combined with the above-mentioned optical film layer 140 to achieve the reflective characteristics of COE, and at the same time, it has little effect on the color deviation of the viewing angle. Among them, in this embodiment, the thickness of the red filter R-CF and the green filter G-CF is small, and the green filter B-CF is not set, which can obtain better blue light transmittance and lower power consumption.

[0054] On the basis of the above-mentioned embodiments, the display screen 100 further includes a first electrode 160 , a pixel unit 170 , a thin film encapsulation layer 180 and a cover plate 190 .

[0055] The first electrode 160 is located in the pixel opening 122 of the pixel defining layer 120. The first electrode 160 is an anode or a cathode. Figure 1 In the middle light path ④, the ambient incident light is reflected by the first electrode 160 and then dispersed into diffraction stripes through the slits in the black matrix 130, and the reflection intensity is further reduced. Furthermore, the first electrode 160 is an anode or a cathode.

[0056] The pixel unit 170 is located in the pixel opening 122 of the pixel defining layer 120. The pixel unit 170 includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. In the display screen of the present invention, the arrangement of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B is not limited and can be arranged in any manner.

[0057] The thin film encapsulation layer 180 is located between the pixel defining layer 120 and the black matrix 130 .

[0058] The cover plate 190 is located on a side of the optical film layer 140 away from the array substrate 110 .

[0059] It is understandable that the display screen 100 of the first embodiment of the present invention may also include other functional layers. Figure 1 The structure in is limited.

[0060] See also Figure 3 and Figure 4 The display screen 200 according to the second embodiment of the present invention includes an array substrate 210 , a pixel defining layer 220 and a black matrix 230 .

[0061] The array substrate 210 includes a substrate 211 and a driving structure layer 212 located on a side of the substrate 211 close to the pixel defining layer 220 .

[0062] The pixel defining layer 220 is located on one side of the array substrate 210 .

[0063] The black matrix 230 is located on a side of the pixel defining layer 220 away from the array substrate 210 , and a plurality of slits 231 penetrating along the thickness direction of the array substrate 210 are disposed in the black matrix 230 .

[0064] Based on the above-mentioned embodiment, the display screen 200 further includes an optical film layer (gray-OC) 140. The optical film layer 240 is coated on a side of the black matrix 230 away from the array substrate 210. The optical film layer 240 is used to further reduce the overall reflectivity.

[0065] In this embodiment, the display screen 200 is not provided with a color filter, and the transmittance of the optical film layer 240 is 50% to 70%. At this time, the display screen 200 of this embodiment realizes the regulation of the overall reflectivity through the combination of the optical film layer 240 and the black matrix 230, which can further optimize the process flow.

[0066] On the basis of the above-mentioned embodiment, the display screen 200 further includes a first electrode 260 , a pixel unit 270 , a thin film encapsulation layer 280 and a cover plate 290 .

[0067] The first electrode 260 is located in the pixel opening 222 of the pixel defining layer 220. The first electrode 260 is an anode or a cathode. Figure 3 In the middle light path ④, the ambient incident light is reflected by the first electrode 260 and then dispersed into diffraction stripes through the slits in the black matrix 230, and the reflection intensity is further reduced.

[0068] The pixel unit 270 is located in the pixel opening 222 of the pixel defining layer 220. The pixel unit 270 includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. In the display screen of the present invention, the arrangement of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B is not limited and can be arranged in any manner.

[0069] The thin film encapsulation layer 280 is located between the pixel defining layer 220 and the black matrix 230 .

[0070] The cover plate 290 is located on a side of the optical film layer 240 away from the array substrate 210 .

[0071] It is understandable that the display screen 200 of the second embodiment of the present invention may also include other functional layers. Figure 3 The structure in is limited.

[0072] In the display screen 200 of this embodiment, a slit is provided in the black matrix 230 and runs through the thickness direction of the array substrate 210. After the incident light from the external environment is reflected by the electrode close to the array substrate, it is diffracted by the slit. Figure 2 As shown in the middle light path ①, it is dispersed into stripes, so it can increase the area of ​​the luminous area in visual effect and effectively reduce the bad screen effect; Figure 3 As shown in the optical path ②, the light that cannot be emitted from the interface of the thin film encapsulation layer 280 is emitted after total reflection through the pixel defining layer 220, and then partially emitted after diffraction through the slits in the black matrix 230, which can effectively improve the light emission efficiency of the display screen 200 and further reduce the light loss of the waveguide effect; at the same time, as shown in the optical path ③, the crosstalk light originally emitted to the adjacent sub-pixels is diffracted and dispersed into stripes after passing through the black matrix 230, which reduces the optical crosstalk between adjacent sub-pixels at high ppi, helps to suppress the optical crosstalk between adjacent sub-pixels, and further reduces the overall reflection intensity.

[0073] See also Figure 5 The display screen 300 of the third embodiment of the present invention includes an array substrate 310, a pixel defining layer 320 and a black matrix 330. The array substrate 310 includes a substrate 311 and a driving structure layer 312 located on a side of the substrate 311 close to the pixel defining layer 320. The pixel defining layer 320 is located on one side of the array substrate 310. The black matrix 330 is located on a side of the pixel defining layer 320 away from the array substrate 310, and a plurality of slits 331 are provided in the black matrix 330 and penetrate along the thickness direction of the array substrate 310.

[0074] In the display screen 300 of this embodiment, a plurality of slits are provided in the black matrix 330 and penetrate the array substrate 310 in the thickness direction. After the incident light from the external environment is reflected by the electrode close to the array substrate, it is diffracted by the above slits. Figure 5 As shown in the optical path ①, it is dispersed into stripes, so it can increase the area of ​​the luminous area in visual effect and effectively reduce the adverse screen effect; at the same time, as shown in the optical path ③, the crosstalk light originally emitted to the adjacent sub-pixels is diffracted and dispersed into stripes after passing through the black matrix 330, which reduces the optical crosstalk between adjacent sub-pixels at high ppi, helps to suppress the optical crosstalk between adjacent sub-pixels, and further reduces the overall reflection intensity.

[0075] On the basis of the above-mentioned embodiment, the ratio of the slit area to the non-slit area of ​​the black matrix 330 is 10% to 40%, and the thickness of the black matrix 330 is 0.5 μm to 1 μm. Such slits have a better diffraction effect on light, and can disperse the light into stripes, which can increase the area of ​​the luminous area in terms of visual effect, effectively reduce the poor screen effect, and reduce the optical crosstalk between adjacent sub-pixels at high ppi, which helps to suppress the optical crosstalk between adjacent sub-pixels.

[0076] Based on the above-mentioned embodiment, the display screen 300 further includes an optical film layer (gray-OC) 340, which is coated on the side of the black matrix 330 away from the array substrate 310. The optical film layer 340 is used to further reduce the overall reflectivity. In this embodiment, the transmittance of the optical film layer 340 is 60% to 80%.

[0077] Based on the above-mentioned embodiment, the display screen 300 also includes a color filter 350, which is located on the same layer as the black matrix 330. The black matrix 330 has a plurality of openings, and the color filter 350 is located in the openings. The optical film layer 340 is covered on the side of the color filter 350 and the black matrix 330 away from the array substrate 310.

[0078] On the basis of the above-mentioned embodiment, the thickness of the color filter 350 is ≤1 μm. Further, the color filter 350 includes a red filter R-CF and a green filter G-CF, the thickness of the red filter R-CF is 0.3 μm to 0.5 μm, and the thickness of the green filter G-CF is 0.5 μm to 1 μm. The thickness of the red filter R-CF can be but is not limited to 0.3 μm, 0.4 μm or 0.5 μm, and the thickness of the green filter G-CF is 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm or 1 μm.

[0079] The color filter 350 of this embodiment is combined with the above-mentioned optical film layer 340 to achieve the reflective characteristics of COE, and at the same time, it has little effect on the color deviation of the viewing angle. Among them, in this embodiment, the thickness of the red filter R-CF and the green filter G-CF is small, and the green filter B-CF is not set, which can obtain better blue light transmittance and lower power consumption.

[0080] On the basis of the above-mentioned embodiment, the display screen 300 further includes a first electrode 360 ​​, a pixel unit 370 , a thin film encapsulation layer 380 and a cover plate 390 .

[0081] The first electrode 360 ​​is located in the pixel opening 322 of the pixel defining layer 320. The first electrode 360 ​​is an anode or a cathode. Figure 5In the middle light path ④, the ambient incident light is reflected by the first electrode 360 ​​and then dispersed into diffraction stripes through the slits in the black matrix 330, and the reflection intensity is further reduced. Furthermore, the first electrode 360 ​​is an anode or a cathode.

[0082] The pixel unit 370 is located in the pixel opening 322 of the pixel defining layer 320. The pixel unit 370 includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. In the display screen of the present invention, the arrangement of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B is not limited and can be arranged in any manner.

[0083] The thin film encapsulation layer 380 is located between the pixel defining layer 320 and the black matrix 330 .

[0084] The cover plate 390 is located on a side of the optical film layer 340 away from the array substrate 310 .

[0085] It is understandable that the display screen 300 of the present invention may also include other functional layers. Figure 5 The structure in is limited.

[0086] Based on the above-mentioned embodiment, a plurality of grooves 324 for reflecting light are provided on the surface of the pixel defining layer 320 away from the array substrate 310. Figure 5 As shown in the middle optical path ②, the light that cannot be emitted from the interface of the thin film encapsulation layer 380 and the color filter 350 is emitted after total reflection through the above-mentioned groove 324, and then partially emitted after diffraction through the slits in the black matrix 330, which can effectively improve the light extraction efficiency of the display screen 300 and further reduce the light loss of the waveguide effect. At the same time, the increase of the groove 324 correspondingly extends the electron transmission path in the horizontal direction, that is, reduces electrical crosstalk.

[0087] Furthermore, the projection of the groove 324 on the array substrate 310 is located within the outer contour of the projection of the black matrix 330 on the array substrate 310. In this way, the light reflected by the groove 324 can be partially emitted after being diffracted by the slits in the black matrix 330.

[0088] Further, the refractive index of the pixel defining layer 320 is 1.5 to 1.6. At this time, the refractive index of the pixel defining layer 320 is lower than the refractive index of other structural layers on the pixel defining layer 320, which is conducive to the light being totally reflected by the groove 324 of the pixel defining layer 320 and then emitted. Further, the refractive index of the pixel defining layer 320 can be, but is not limited to, 1.5 or 1.6.

[0089] Further, the maximum opening width of the groove 324 is 1.5 μm to 2 μm, and the depth of the groove 324 along the thickness direction of the display screen 300 is 0.5 μm to 1 μm. Further, the maximum opening width of the groove 324 may be, but not limited to, 1.5 μm, 1.6 μm, 1.7 μm, 1.8 μm, 1.9 μm or 2 μm, and the depth of the groove 324 along the thickness direction of the display screen 300 may be, but not limited to, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm or 1 μm.

[0090] Furthermore, the cross-sectional shape of the groove 324 along the thickness direction of the display screen is V-shaped, U-shaped or inverted trapezoidal, which is conducive to a better reflection effect on light.

[0091] See also Figure 6 The display screen 400 of the fourth embodiment of the present invention includes an array substrate 410, a pixel defining layer 420 and a black matrix 430. The array substrate 410 includes a substrate 411 and a driving structure layer 412 located on a side of the substrate 411 close to the pixel defining layer 420. The pixel defining layer 420 is located on one side of the array substrate 410. The black matrix 430 is located on a side of the pixel defining layer 420 away from the array substrate 410, and a plurality of slits 431 are provided in the black matrix 430 and penetrate along the thickness direction of the array substrate 410.

[0092] In the display screen 400 of this embodiment, a plurality of slits are provided in the black matrix 430 and penetrate the array substrate 410 in the thickness direction. After the incident light from the external environment is reflected by the electrode close to the array substrate, it is diffracted by the above slits. Figure 2 As shown in the optical path ①, it is dispersed into stripes, so the area of ​​the luminous area can be increased in visual effect, and the adverse screen window effect can be effectively reduced; at the same time, as shown in the optical path ③, the crosstalk light originally emitted to the adjacent sub-pixels is diffracted and dispersed into stripes after passing through the black matrix 130, which reduces the optical crosstalk between adjacent sub-pixels at high ppi, helps to suppress the optical crosstalk between adjacent sub-pixels, and further reduces the overall reflection intensity.

[0093] In this embodiment, the display screen 400 further includes an optical film layer (gray-OC) 440, which is disposed on a side of the black matrix 430 away from the array substrate 410. The optical film layer 440 is used to further reduce the overall reflectivity.

[0094] In this embodiment, the display screen 400 does not include a color filter, and the transmittance of the optical film layer 440 is 50% to 70%. At this time, the display screen 400 of this embodiment does not have a color filter, and the combination of the optical film layer 440 and the black matrix 430 is used to achieve the regulation of the overall reflectivity, which can further optimize the process flow.

[0095] On the basis of the above-mentioned implementation, the display screen 400 further includes a first electrode 460 , a pixel unit 470 , a thin film encapsulation layer 480 and a cover plate 490 .

[0096] The first electrode 460 is located in the pixel opening 422 of the pixel defining layer 420. The first electrode 460 is an anode or a cathode. Figure 6 In the middle light path ④, the ambient incident light is reflected by the first electrode 460 and then dispersed into diffraction stripes through the slits in the black matrix 430, and the reflection intensity is further reduced.

[0097] The pixel unit 470 is located in the pixel opening 422 of the pixel defining layer 420. The pixel unit 470 includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. In the display screen of the present invention, the arrangement of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B is not limited and can be arranged in any manner.

[0098] The thin film encapsulation layer 480 is located between the pixel defining layer 420 and the black matrix 430 .

[0099] The cover plate 490 is located on a side of the optical film layer 440 away from the array substrate 410 .

[0100] It is understandable that the display screen 400 of the fourth embodiment of the present invention may also include other functional layers. Figure 6 The structure in is limited.

[0101] Based on the above-mentioned embodiment, a plurality of grooves 424 for reflecting light are provided on the surface of the pixel defining layer 420 away from the array substrate 410. Figure 6 As shown in the middle optical path ②, the light that cannot be emitted from the interface of the thin film encapsulation layer 480 and the color filter 450 is emitted after total reflection through the above-mentioned groove 424, and then partially emitted after diffraction through the slits in the black matrix 430, which can effectively improve the light extraction efficiency of the display screen 400 and further reduce the light loss of the waveguide effect. At the same time, the increase of the groove 424 correspondingly extends the electron transmission path in the horizontal direction, that is, reduces electrical crosstalk.

[0102] In the display screen using the technical solution of the present invention, a plurality of slits penetrating along the thickness direction of the array substrate are provided in the black matrix. After the incident light from the external environment is reflected by the electrode close to one side of the array substrate, it is diffracted by the above-mentioned slits and dispersed into stripes. Therefore, the area of ​​the luminous area can be increased in visual effect, and the undesirable screen window effect can be effectively reduced; at the same time, it also helps to suppress optical crosstalk between adjacent sub-pixels and further reduce the overall reflection intensity.

[0103] A display device according to one embodiment includes any one of the above display screens.

[0104] A display device using the technical solution of the present invention includes a display screen, a black matrix is ​​provided with a plurality of slits penetrating along the thickness direction of an array substrate, and incident light from the external environment is reflected by an electrode close to one side of the array substrate and then diffracted by the slits to be dispersed into stripes, thereby visually increasing the area of ​​the luminous region and effectively reducing the adverse screen window effect. At the same time, it also helps to suppress optical crosstalk between adjacent sub-pixels and further reduce the overall reflection intensity.

[0105] With reference to the above implementation contents, in order to make the technical solution of the present invention more specific, clear and easy to understand, the technical solution of the present invention is now exemplified. However, it should be noted that the contents to be protected by the present invention are not limited to the following embodiments.

[0106] Example 1

[0107] Embodiment 1 provides a display screen.

[0108] See also Figure 1 and Figure 2 The display screen 100 of Embodiment 1 includes an array substrate 110, a pixel defining layer 120 and a black matrix 130. The array substrate 110 includes a substrate 111 and a driving structure layer 112 located on a side of the substrate 111 close to the pixel defining layer 120. The pixel defining layer 120 is located on one side of the array substrate 110.

[0109] The black matrix 130 is located on the side of the pixel defining layer 120 away from the array substrate 110, and a plurality of slits 131 are provided in the black matrix 130 and penetrate along the thickness direction of the array substrate 110. The ratio of the slit area to the non-slit area of ​​the black matrix 130 is 20%, and the thickness of the black matrix 130 is 1 μm.

[0110] Furthermore, the display screen 100 further includes an optical film layer (gray-OC) 140 . The optical film layer 140 is coated on a side of the black matrix 130 away from the array substrate 110 . The transmittance of the optical film layer 140 is 70%.

[0111] Furthermore, the display screen 100 also includes a color filter 150, which is located on the same layer as the black matrix 130. The black matrix 130 has a plurality of openings, and the color filter 150 is located in the above openings. The optical film layer 140 is covered on the side of the color filter 150 and the black matrix 130 away from the array substrate 110.

[0112] Furthermore, the color filter 150 includes a red filter R-CF and a green filter G-CF. The thickness of the red filter R-CF is 0.5 μm, and the thickness of the green filter G-CF is 1 μm.

[0113] Further, the display screen 100 also includes a first electrode 160, a pixel unit 170, a thin film encapsulation layer 180 and a cover plate 190. The first electrode 160 is located in the pixel opening 122 of the pixel defining layer 120. The first electrode 160 is an anode. The pixel unit 170 is located in the pixel opening 122 of the pixel defining layer 120. The pixel unit 170 includes a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B. The thin film encapsulation layer 180 is located between the pixel defining layer 120 and the black matrix 130. The cover plate 190 is located on the side of the optical film layer 140 away from the array substrate 110.

[0114] Comparative Example 1

[0115] Comparative Example 1 provides a display screen, which is different from Example 1 only in that no slits penetrating along the thickness direction of the array substrate are provided in the black matrix.

[0116] For details, see Figure 7 The display screen 100' of comparative example 1 includes an array substrate 110', a pixel defining layer 120' and a black matrix 130'. The array substrate 110' includes a substrate 111' and a driving structure layer 112' located on a side of the substrate 111' close to the pixel defining layer 120'. The pixel defining layer 120' is located on one side of the array substrate 110'.

[0117] The black matrix 130 ′ is located on a side of the pixel defining layer 120 ′ away from the array substrate 110 ′, and the thickness of the black matrix 130 ′ is 1 μm.

[0118] Furthermore, the display screen 100 ′ further includes an optical film layer (gray-OC) 140 ′. The optical film layer 140 ′ is coated on a side of the black matrix 130 ′ away from the array substrate 110 ′. The transmittance of the optical film layer 140 ′ is 70%.

[0119] Furthermore, the display screen 100' further includes a color filter 150', which is located on the same layer as the black matrix 130' and is adjacent to the black matrix 130', and the optical film layer 140' is disposed on a side of the color filter 150' and the black matrix 130' away from the array substrate 110'.

[0120] Furthermore, the color filter 150 ′ includes a red filter R-CF and a green filter G-CF. The thickness of the red filter R-CF is 0.5 μm, and the thickness of the green filter G-CF is 1 μm.

[0121] Further, the display screen 100' also includes a first electrode 160', a pixel unit 170', a thin film encapsulation layer 180' and a cover plate 190'. The first electrode 160' is located in the pixel opening 122' of the pixel defining layer 120'. The first electrode 160' is an anode. The pixel unit 170' is located in the pixel opening 122' of the pixel defining layer 120'. The pixel unit 170' includes a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B. The thin film encapsulation layer 180' is located between the pixel defining layer 120' and the black matrix 130'. The cover plate 190' is located on the side of the optical film layer 140' away from the array substrate 110'.

[0122] Performance Testing:

[0123] The display screens of Example 1 and Comparative Example 1 are simulated, and the schematic diagram of the display effect is as shown in FIG. Figure 8 As shown, Figure 8 (a) is a schematic diagram of the display effect of the display screen 100' of comparative example 1, Figure 8 (b) and Figure 8 (c) is a schematic diagram of the display effect of the display screen 100 of Example 1, Figure 8 (d) is a schematic diagram of the display effect of a single pixel. Figure 8 It can be seen that the display screen 100 of Example 1 passively emits light in the non-luminous area, and the area of ​​the luminous area is increased in visual effect.

[0124] The specific analysis of the above display effect is as follows:

[0125] The black matrix 130 of the display screen 100 of the first embodiment is provided with a plurality of slits penetrating along the thickness direction of the array substrate 110. After the incident light from the external environment is reflected by the first electrode 160 close to the side of the array substrate 110, it is diffracted by the above slits. Figure 1 As shown in the middle light path ①, it is dispersed into stripes, so it can increase the area of ​​the luminous area in visual effect and effectively reduce the bad screen effect; Figure 1 As shown in the optical path ②, the light that cannot be emitted from the interface of the thin film encapsulation layer 180 and the color filter 150 is emitted after total reflection through the pixel defining layer 120, and then partially emitted after diffraction through the slits of the black matrix 130, which can effectively improve the light emission efficiency of the display screen 100 and further reduce the light loss of the waveguide effect; at the same time, as shown in the optical path ③, the crosstalk light originally emitted to the adjacent sub-pixels is diffracted and dispersed into stripes after passing through the black matrix 130, which reduces the optical crosstalk between adjacent sub-pixels at high ppi, helps to suppress the optical crosstalk between adjacent sub-pixels, and further reduces the overall reflection intensity. In addition, as shown in the optical path ③, Figure 1 In the middle light path ④, the ambient incident light is reflected by the first electrode 160 and then dispersed into diffraction stripes through the slits of the black matrix 130, and the reflection intensity is further reduced.

[0126] The black matrix 130' of the display screen 100' of comparative example 1 is not provided with slits penetrating along the thickness direction of the array substrate. After the incident light from the external environment passes through the first electrode 160' close to the side of the array substrate 110', as shown in FIG. Figure 7 As shown in the optical paths ① and ③, the black matrix 130' cannot be penetrated; Figure 7 As shown in the optical path ④, the ambient incident light cannot penetrate the black matrix 130' after being reflected by the first electrode 160'; Figure 7 As shown in the middle optical path ②, the light that cannot be emitted from the interface between the thin film encapsulation layer 180' and the red filter R-CF is totally reflected by the pixel defining layer 120' to the green filter G-CF and still cannot be emitted.

[0127] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0128] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A display screen, characterized in that: The display screen comprises: An array substrate; a pixel defining layer, located on one side of the array substrate; and The black matrix is ​​located on a side of the pixel defining layer away from the array substrate, and a plurality of slits penetrating along a thickness direction of the array substrate are arranged in the black matrix.

2. The display screen according to claim 1, characterized in that: The ratio of the slit area to the non-slit area of ​​the black matrix is ​​10% to 40%, and the thickness of the black matrix is ​​0.5 μm to 1 μm.

3. The display screen according to claim 1, characterized in that: A groove is provided on a surface of the pixel defining layer away from the array substrate; Preferably, the projection of the groove on the array substrate is located within the outer contour of the projection of the black matrix on the array substrate; Preferably, the refractive index of the pixel defining layer is 1.5-1.

6.

4. The display screen according to claim 3, characterized in that: The maximum opening width of the groove is 1.5 μm to 2 μm, and the depth of the groove along the thickness direction of the display screen is 0.5 μm to 1 μm; Preferably, the cross-sectional shape of the groove along the thickness direction of the display screen is V-shaped, U-shaped or inverted trapezoidal.

5. The display screen according to claim 1, characterized in that: The display screen further comprises an optical film layer, and the optical film layer is coated on a side of the black matrix away from the array substrate; Preferably, the transmittance of the optical film layer is 50% to 80%; Preferably, the material of the optical film layer includes a mixture of one or more of organic glue, inorganic non-metallic material, metal and metal oxide; The inorganic non-metallic material includes a mixture of one or more of silicon nitride and silicon oxide; The metal comprises a mixture of one or more of silver, aluminum and molybdenum; The metal oxide includes a mixture of one or more of silver oxide, aluminum oxide and molybdenum oxide.

6. The display screen according to claim 5, characterized in that: The display screen further comprises a color filter, which is located in the same layer as the black matrix and is adjacent to the black matrix. The optical film layer is coated on a side of the color filter and the black matrix away from the array substrate.

7. The display screen according to claim 6, characterized in that: The thickness of the color filter is ≤1 μm.

8. The display screen according to claim 7, characterized in that: The color filter comprises a red filter and a green filter, and the thickness of the red filter is smaller than the thickness of the green filter; Preferably, the thickness of the red filter is 0.3 μm to 0.5 μm, and the thickness of the green filter is 0.5 μm to 1 μm.

9. The display screen according to claim 5, characterized in that: The display screen also includes: A first electrode is located in a pixel opening of the pixel defining layer; A pixel unit, located in a pixel opening of the pixel defining layer; a thin film encapsulation layer, located between the pixel defining layer and the black matrix; and A cover plate, located at a side of the optical film layer away from the array substrate; Preferably, the first electrode is an anode or a cathode.

10. A display device, characterized in that: The invention comprises the display screen as claimed in any one of claims 1 to 9.

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