WO2019114135A1 - 一种显示屏和终端 - Google Patents
一种显示屏和终端 Download PDFInfo
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- WO2019114135A1 WO2019114135A1 PCT/CN2018/077269 CN2018077269W WO2019114135A1 WO 2019114135 A1 WO2019114135 A1 WO 2019114135A1 CN 2018077269 W CN2018077269 W CN 2018077269W WO 2019114135 A1 WO2019114135 A1 WO 2019114135A1
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- display screen
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/352—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels the areas of the RGB subpixels being different
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/126—Shielding, e.g. light-blocking means over the TFTs
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/873—Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
Definitions
- the present application relates to the field of display screens, and in particular, to a display screen and a terminal.
- the structure of an existing Organic Light-Emitting Diode (OLED) display screen is as shown in FIG. 1.
- the OLED display panel includes an encapsulation layer, a cathode, an electron injection layer, an electron transport layer, a light-emitting layer, and a hole transport layer.
- a cathode is a metal material, which is also referred to as a cathode metal layer due to The presence of the cathode metal layer reflects the ambient light outside the display screen, causing the contrast of the panel to decrease, affecting the display effect, and the process diagram of the cathode metal layer reflecting the ambient light is as shown in FIG.
- a common solution is to provide a circular polarizer outside the package layer so that the outside does not receive the reflected light of the cathode metal layer, and the structure thereof is as shown in FIG. 3, but the structure There may be the following problems:
- the transmittance of the display screen is reduced, the transmittance of the polarizer is less than 50%;
- the thickness of the circular polarizer is about 100 microns, which greatly increases the thickness of the display screen, which is not conducive to the bending of the screen. fold.
- the purpose of the embodiments of the present invention is to solve the problem that the thickness of the polarizer is large in the prior art.
- an embodiment of the present invention provides a display screen including a cathode metal layer, an encapsulation layer disposed on an upper surface of the cathode metal layer, and an organic light-emitting layer disposed on a lower surface of the cathode metal layer, the organic light-emitting layer The non-light-emitting area and the plurality of light-emitting areas are included; the display screen further includes a light-shielding layer disposed on an upper surface of the package layer, and the light-shielding layer is configured to block the non-light-emitting area in the organic light-emitting layer.
- the arrangement of the light shielding layer can effectively reduce the ambient light reflection of the cathode metal layer, eliminating the polarizing film layer, and solving the problem of reflecting the ambient light of the cathode metal layer with a thin thickness, and avoiding the wearing by the polarizer.
- the optical density of the light shielding layer is greater than or equal to 3.0.
- the optical density of the light-shielding layer ensures effective shielding of ambient light.
- the light shielding layer has a thickness of 1 micrometer.
- the setting of the light shielding layer eliminates the polarizing film layer, reduces the thickness of the display screen, and can improve the bending ability of the screen.
- the material of the light shielding layer is chromium or propylene resin.
- an embodiment of the present invention provides a terminal, including the display screen of the first aspect.
- the terminal is a mobile phone, a wearable device or a tablet.
- an embodiment of the present invention provides a display panel including an encapsulation layer, a light shielding layer, a cathode metal layer, and an organic light emitting layer, wherein the light shielding layer is located between the encapsulation layer and the cathode metal layer, and the organic light emitting layer is located on the cathode metal layer.
- the lower surface, the organic light emitting layer includes a non-light emitting region and a plurality of light emitting regions, and the light shielding layer is used to block the non-light emitting region of the organic light emitting layer.
- the arrangement of the light shielding layer can effectively reduce the ambient light reflection of the cathode metal layer, eliminating the polarizing film layer, and solving the problem of reflecting the ambient light of the cathode metal layer with a thin thickness, and avoiding the wearing by the polarizer.
- the optical density of the light shielding layer is greater than or equal to 3.0.
- the optical density of the light-shielding layer ensures effective shielding of ambient light.
- the light shielding layer has a thickness of 1 micrometer.
- the setting of the light shielding layer eliminates the polarizing film layer, reduces the thickness of the display screen, and can improve the bending ability of the screen.
- the material of the light shielding layer is chromium or propylene resin.
- an embodiment of the present invention provides a terminal, including the display screen of the third aspect.
- the terminal is a mobile phone, a wearable device or a tablet.
- the display screen mentioned in the above embodiment is an organic light emitting diode display screen.
- the light shielding layer is added, the ambient light reflection of the cathode metal layer is effectively reduced, the polarizing film layer is omitted, and the problem of reflecting the ambient light of the cathode metal layer is solved with a thin thickness, and the polarized light is avoided.
- the film brings a low penetration rate problem.
- FIG. 1 is a schematic structural view of an OLED display screen in the prior art
- FIG. 2 is a schematic view showing a process of reflecting ambient light by a cathode metal layer in an OLED display screen of the prior art
- FIG. 3 is a schematic view showing the structure of an OLED incorporating a circular polarizer in the prior art
- FIG. 4 is a schematic structural diagram of an OLED display screen according to an embodiment of the present invention.
- FIG. 5 is a schematic structural view of an OLED pixel
- Figure 6 is a top plan view of the display screen
- FIG. 7 is a schematic structural diagram of an OLED display screen provided with a light shielding layer according to an embodiment of the present invention.
- FIG. 8 is a schematic structural diagram of another OLED display screen provided with a light shielding layer according to an embodiment of the present invention.
- Figure 9 is a schematic view showing an increase in aperture ratio resulting in light mixing
- FIG. 10 is a schematic view showing that the light shielding layer blocks the light mixing region and increases the aperture ratio.
- Embodiments of the present invention provide a display screen including a cathode metal layer, an encapsulation layer disposed on an upper surface of the cathode metal layer, and an organic light-emitting layer disposed on a lower surface of the cathode metal layer, and a surface on the upper surface of the cathode metal layer
- a light shielding layer is added, which is used to block non-light-emitting regions in the organic light-emitting layer and reduce ambient light reflection of the cathode metal layer.
- the display screen includes a cathode metal layer, an encapsulation layer disposed on an upper surface of the cathode metal layer, and an organic light emitting layer disposed on a lower surface of the cathode metal layer, the organic light emitting layer including a non-light emitting region and a plurality of light emitting regions.
- the display screen further includes a light shielding layer disposed on an upper surface of the encapsulation layer, and the light shielding layer is configured to block a non-light emitting region in the organic light emitting layer.
- the arrangement of the light shielding layer effectively reduces the ambient light reflection of the cathode metal layer, eliminates the polarizing film layer, and solves the problem that the cathode metal layer reflects ambient light with a thin thickness, and avoids the polarized film.
- the display screen includes an encapsulation layer, a cathode metal layer, an organic light emitting layer, an anode metal layer, and a substrate.
- the surface is further provided with a light shielding layer, and the organic light emitting layer includes a non-light emitting region and a plurality of light emitting regions.
- FIG. 5 is a schematic diagram of a pixel structure of an OLED. As shown in FIG. 5, R, G, and B are sub-pixel light-emitting regions, and regions other than R, G, and B are non-light-emitting regions.
- FIG. 6 is a top plan view of FIG. 4 . As shown in FIG. 4 and FIG. 6 , the shaded portion is a light shielding layer, and the light shielding layer blocks the non-light emitting region and does not block the light emitting region, thereby effectively reducing ambient light reflection of the cathode metal layer.
- the light-emitting area may be regular or irregular, and how many light-emitting areas are present in the organic light-emitting layer, and the positional relationship between the light-emitting areas may be changed.
- FIG. 7 is a cross-sectional view showing the structure of an OLED display screen provided with a light shielding layer according to an embodiment of the present invention.
- the display screen comprises a cathode metal layer, an encapsulation layer, an organic light-emitting layer, an encapsulation layer on the upper surface of the cathode metal layer, an organic light-emitting layer on the lower surface of the cathode metal layer, and a light-shielding layer on the encapsulation layer.
- the upper surface of the light shielding layer blocks the non-light-emitting area of the organic light-emitting layer and does not block the light-emitting area, so that the ambient light reflection of the cathode metal layer can be effectively reduced.
- the light shielding layer has a thickness of 1 micrometer, and the thickness of the display panel is reduced relative to the thickness of the polarizing layer of 100 micrometers, which improves the bending ability of the screen.
- the optical density (OD) of the light shielding layer is greater than or equal to 3.0.
- the light shielding layer is prepared by coating, evaporating, depositing a coating or laminating a film.
- the light shielding layer is formed by coating
- the place where the shielding is not required is etched by photolithography.
- the material of the light shielding layer is chromium or propylene resin.
- carbon may be added to the propylene resin.
- the light shielding layer is between the cathode metal layer and the encapsulation layer.
- the embodiment of the invention provides a display screen comprising an encapsulation layer, a light shielding layer, a cathode metal layer and an organic light emitting layer, wherein the light shielding layer is located between the encapsulation layer and the cathode metal layer, and the organic light emitting layer is located on the lower surface of the cathode metal layer, and the organic light emitting layer
- the layer includes a non-light emitting region and a plurality of light emitting regions, and the light shielding layer is for shielding the non-light emitting region of the organic light emitting layer.
- the arrangement of the light shielding layer can also effectively reduce the ambient light reflection of the cathode metal layer, eliminating the polarizing film layer, and solving the problem of reflecting the ambient light of the cathode metal layer with a thin thickness, and avoiding the wearing by the polarizer.
- FIG. 8 is a cross-sectional view showing another structure of an OLED display screen provided with a light shielding layer according to an embodiment of the present invention.
- the display screen includes a cathode metal layer, an encapsulation layer, an organic light-emitting layer, and a light shielding layer between the cathode metal layer and the encapsulation layer (the light shielding layer is located on the upper surface of the cathode metal layer, and the organic light-emitting layer is located
- the lower surface of the cathode metal layer is disposed on the upper surface of the light shielding layer, the light shielding layer blocks the non-light-emitting region of the organic light-emitting layer, and does not block the light-emitting region, thereby reducing ambient light reflection of the cathode metal layer.
- the light shielding layer has a thickness of 1 micrometer, and the thickness of the display panel is reduced relative to the thickness of the polarizing layer of 100 micrometers, which improves the bending ability of the screen.
- the optical density (OD) of the light shielding layer is greater than or equal to 3.0.
- the light shielding layer is prepared by coating, evaporating, depositing a coating or laminating a film.
- the light shielding layer is formed by coating, after the light shielding layer is coated on the upper surface of the cathode metal layer, the place where the shielding is not required is etched by photolithography.
- the material of the light shielding layer is chromium or propylene resin.
- carbon may be added to the propylene resin.
- the light shielding layer in FIGS. 7 and 8 may be a deposited layer, which may be formed by various deposition methods such as sputtering, arc evaporation, vapor deposition, and the like. Those skilled in the art can select a suitable deposition method to form a deposited coating layer as an electrostatic discharge layer as needed in the description of the specification.
- the light shielding layer in FIGS. 7 and 8 may be a laminated film, which may be a film formed according to various materials according to various materials, such as a PU film, a TPU film, etc., and Fit to the desired surface.
- the reflectance curves of the light shielding layers shown in Figures 7 and 8 are as flat as possible to avoid color shifting of the reflected light.
- the arrangement of the light shielding layer can not only reduce the thickness of the display screen, but also increase the aperture ratio of the OLED, thereby increasing the brightness of the display screen, wherein the aperture ratio is the pixel illumination area.
- Fig. 9 is a schematic view showing an increase in the aperture ratio resulting in the occurrence of light mixing.
- a specific gap is reserved between the OLED sub-pixels RGB. If the gap is too small, the sub-pixel light-emitting areas overlap with each other, and the RGB light-emitting area may be mixed to affect the light-emitting effect.
- the pixel light-emitting area is the area of the sub-pixel RGB, the area of each light-emitting area is fixed, and the total area of the pixel is the area of the display screen.
- FIG. 10 is a schematic view showing that the light shielding layer blocks the light mixing region and increases the aperture ratio.
- the total area of the pixels is constant, and in order to increase the aperture ratio, only the area of the sub-pixel RGB domain can be increased, and the area of each of the light-emitting areas is Fixed, only by reducing the gap between the light-emitting areas, increasing the number of light-emitting areas, thereby increasing the total area of the light-emitting area, in Figure 10, after the gap between the light-emitting areas is reduced, the resulting mixed light is shaded The layer is obscured and cannot be transmitted out of the display. This increases the aperture ratio and prevents the light from affecting the display of the entire display.
- an embodiment of the present invention further provides a terminal, including the display screen as described above.
- the terminal can be a cell phone, a wearable device, or a tablet, such as a watch, glasses, or the like.
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Abstract
本发明实施例涉及一种显示屏,包括阴极金属层,设置在阴极金属层上表面的封装层,以及设置在阴极金属层下表面的有机发光层,有机发光层包括非发光区域和多个发光区域;显示屏还包括遮光层,遮光层设置在封装层的上表面,或者遮光层设置在阴极金属层和封装层之间,遮光层用于遮挡有机发光层中的非发光区域。本发明实施例增加的遮光层,有效地减少了阴极金属层的环境光反射,省去了偏光片层,以较薄的厚度避免了阴极金属层反射环境光带来的显示问题。
Description
本申请要求于2017年12月11日提交中国专利局、申请号为201711311692.1、申请名称为“一种OLED显示屏”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及显示屏领域,尤其涉及一种显示屏和终端。
现有的有机发光二极管(Organic Light-Emitting Diode,OLED)显示屏的结构如图1所示,OLED显示屏包括封装层,阴极,电子注入层,电子传输层,发光层,空穴传输层,空穴注入层,阳极,基板,其中,电子注入层,电子传输层,发光层,空穴传输层,空穴注入层统称为有机发光层,阴极为金属材质,又称为阴极金属层,由于阴极金属层的存在,会反射显示屏外的环境光,导致面板对比度下降,影响显示效果,阴极金属层反射环境光的过程示意图如2所示。
为了解决阴极金属层反射环境光的问题,目前常见的解决方法是在封装层外设置圆形偏光片,使得外界接收不到阴极金属层的反射光,其结构如图3所示,但是该结构可能存在着以下问题:
(1)显示屏的透过率降低,偏光片的穿透率低于50%;(2)圆形偏光片的厚度为100微米左右,大幅度增加了显示屏的厚度,不利于屏幕的弯折。
发明内容
本发明实施例的目的在于,解决现有技术中,偏光片带来的厚度较大的问题。
第一方面,本发明实施例提供了一种显示屏,该显示屏包括阴极金属层,设置在阴极金属层上表面的封装层,以及设置在阴极金属层下表面的有机发光层,有机发光层包括非发光区域和多个发光区域;该显示屏还包括遮光层,遮光层设置在封装层的上表面,遮光层用于遮挡有机发光层中的非发光区域。该遮光层的设置,可以有效减少阴极金属层的环境光反射,省去了偏光片层,以较薄的厚度,解决了阴极金属层反射环境光的问题,同时避免了偏光片带来的穿透率较低的问题。
在一种可能的实施方式中,遮光层的光密度大于或者等于3.0。遮光层的光密度可以保证有效地遮挡环境光。
在一种可能的实施方式中,该遮光层的厚度为1微米。遮光层的设置省去了偏光片层,减小了显示屏的厚度,可以提高屏幕的折弯能力。
在一种可能的实施方式中,遮光层的材料为铬或者丙烯树脂。
第二方面,本发明实施例提供了一种终端,包括第一方面的显示屏。
在一种可能的实施方式中,该终端为手机,穿戴式设备或平板。
第三方面,本发明实施例提供了一种显示屏,包括封装层、遮光层、阴极金属层和有机发光层,遮光层位于封装层和阴极金属层之间,有机发光层位于阴极金属层的下表面,有机发光层包括非发光区域和多个发光区域,遮光层用于遮挡有机发光层的非发光区域。该遮光层的设置,可以有效减少阴极金属层的环境光反射,省去了偏光片层,以较薄的厚度,解决了阴极金属层反射环境光的问题,同时避免了偏光片带来的穿透率较低的问题。
在一种可能的实施方式中,遮光层的光密度大于或者等于3.0。遮光层的光密度可以保证有效地遮挡环境光。
在一种可能的实施方式中,该遮光层的厚度为1微米。遮光层的设置省去了偏光片层,减小了显示屏的厚度,可以提高屏幕的折弯能力。
在一种可能的实施方式中,遮光层的材料为铬或者丙烯树脂。
第四方面,本发明实施例提供了一种终端,包括第三方面的显示屏。
在一种可能的实施方式中,该终端为手机,穿戴式设备或平板。
其中,上述实施方式中提到的显示屏为有机发光二极管显示屏。
本发明实施例中增加了遮光层,有效地减少了阴极金属层的环境光反射,省去了偏光片层,以较薄的厚度,解决了阴极金属层反射环境光的问题,同时避免了偏光片带来的穿透率较低的问题。
图1为现有技术中OLED显示屏的结构示意图;
图2为现有技术中OLED显示屏中,阴极金属层反射环境光的过程示意图;
图3为现有技术中加入圆形偏光片的OLED结构示意图;
图4为本发明实施例提供的一种OLED显示屏的结构示意图;
图5为OLED像素结构示意图;
图6显示屏的一种俯视示意图;
图7为本发明实施例提供的一种设置有遮光层的OLED显示屏结构示意图;
图8为本发明实施例提供的另一种设置有遮光层的OLED显示屏结构示意图;
图9为开口率增加导致出现混光的示意图;
图10为遮光层遮挡混光区域,提高开口率的示意图。
为使本发明实施例的目的、技术方案和优点更加清楚,下面结合本发明实施例中的附图和实施例,对本发明的技术方案进行清楚地描述。显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。
本发明实施例提供一种显示屏,该显示屏包括阴极金属层,设置在阴极金属层上表面的封装层,以及设置在阴极金属层下表面的有机发光层,在阴极金属层上表面的一侧,增加遮光层,遮光层用于遮挡有机发光层中的非发光区域,减少阴极金属层的环境光反射。
在一个示例中,该显示屏包括阴极金属层,设置在阴极金属层上表面的封装层, 以及设置在阴极金属层下表面的有机发光层,有机发光层包括非发光区域和多个发光区域,该显示屏还包括遮光层,遮光层设置在封装层的上表面,遮光层用于遮挡有机发光层中的非发光区域。该遮光层的设置,有效地减少了阴极金属层的环境光反射,省去了偏光片层,以较薄的厚度,解决了阴极金属层反射环境光的问题,同时避免了偏光片带来的穿透率较低的问题。
下面以OLED显示屏为例,结合附图和实施例,对本发明的技术方案进行进一步描述。图4为本发明实施例提供的一种OLED显示屏的结构示意图,如图4所示,该显示屏包括封装层,阴极金属层,有机发光层,阳极金属层,基板,在封装层的上表面还设置有遮光层,有机发光层包括非发光区域和多个发光区域。
图5为OLED的像素结构示意图,如图5所示,R,G,B为子像素发光区域,在R,G,B以外的区域为非发光区域。图6为图4的一种俯视示意图,如图4和图6所示,阴影部分即为遮光层,遮光层遮挡非发光区域,不遮挡发光区域,可以有效减少阴极金属层的环境光反射。应当理解,根据器件设计需求,发光区域可以是规则的,也可以是不规则的,有机发光层中有多少发光区域,发光区域之间的位置关系都是可以改变的。
图7为本发明实施例提供的一种设置有遮光层的OLED显示屏结构剖视图。
在如图7所示的例子中,显示屏包括阴极金属层,封装层,有机发光层,封装层位于阴极金属层的上表面,有机发光层位于阴极金属层的下表面,遮光层位于封装层的上表面,该遮光层遮挡有机发光层的非发光区域,不遮挡发光区域,可以有效地减少阴极金属层的环境光反射。
在一个示例中,该遮光层厚度为1微米,相对于厚度为100微米的偏光片层,减小了显示屏的厚度,提高了屏幕的弯折能力。
在一个示例中,遮光层的光密度(optical density,OD)大于或者等于3.0。
在一个示例中,遮光层通过涂布、蒸镀,沉积涂层或者贴合薄膜的方式制备。
在一个示例中,通过涂布制作遮光层时,可以在封装层上表面涂布遮光层后,通过光刻的方法将不需要遮挡的地方刻蚀掉。
在一个示例中,遮光层的材料为铬或者丙烯树脂。
在一个示例中,丙烯树脂中可以加入碳。
在一个实施例中,遮光层位于阴极金属层和封装层之间。
本发明实施例提供一种显示屏,包括封装层、遮光层、阴极金属层和有机发光层,遮光层位于封装层和阴极金属层之间,有机发光层位于阴极金属层的下表面,有机发光层包括非发光区域和多个发光区域,遮光层用于遮挡有机发光层的非发光区域。该遮光层的设置,同样可以有效减少阴极金属层的环境光反射,省去偏光片层,以较薄的厚度,解决了阴极金属层反射环境光的问题,同时避免了偏光片带来的穿透率较低的问题。
图8为本发明实施例提供的另一种设置有遮光层的OLED显示屏结构剖视图。
在如图8所示的例子中,显示屏包括阴极金属层,封装层,有机发光层,遮光层位于阴极金属层和封装层之间(遮光层位于阴极金属层的上表面,有机发光层位于阴极金属层的下表面),封装层位于遮光层的上表面,该遮光层遮挡有机发光层的非发光区,不遮挡发光区域,可以减少阴极金属层的环境光反射。
在一个示例中,该遮光层厚度为1微米,相对于厚度为100微米的偏光片层,减小了显示屏的厚度,提高了屏幕的弯折能力。
在一个示例中,遮光层的光密度(optical density,OD)大于或者等于3.0。
在一个示例中,遮光层通过涂布、蒸镀,沉积涂层或者贴合薄膜的方式制备。
在一个示例中,通过涂布制作遮光层时,可以在阴极金属层上表面涂布遮光层后,通过光刻的方法将不需要遮挡的地方刻蚀掉。
在一个示例中,遮光层的材料为铬或者丙烯树脂。
在一个示例中,丙烯树脂中可以加入碳。
在一个示例中,在图7和8中的遮光层可以为沉积层,该沉积涂层可以通过多种沉积方式来形成,例如溅射法、电弧蒸镀法、气相沉积法等。本领域技术人员在阅读说明书的情况下,能够根据需要选择适当的沉积方式形成沉积涂层作为静电释放层。
在另一示例中,在图7和8中的遮光层可以为贴合薄膜,该贴合薄膜可以是基于多种材料、根据多种方式形成的薄膜,例如PU薄膜,TPU薄膜等,并可贴合到所需的表面上。
图7和图8所示出的遮光层的反射率曲线尽可能平坦,避免反射光偏色。
在上述图7和图8所示的实施例中,遮光层的设置,除了可以减小显示屏的厚度,还可以提高OLED的开口率,进而增加显示屏亮度,其中,开口率为像素发光面积与像素总面积的比值。
图9为开口率增加导致出现混光的示意图。如图9所示,OLED子像素RGB之间会预留特定的间隙,如果间隙太小,子像素发光区域与相互重叠,RGB发光区域会出现混光,影响发光效果。其中,像素发光面积为子像素RGB的面积,每个发光区域的面积是固定的,像素总面积为显示屏的面积。
图10为遮光层遮挡混光区域,提高开口率的示意图。结合图9和图10,在图9中,对于同一显示屏而言,像素总面积是不变的,为了增加开口率,只能增加子像素RGB域的面积,而每个发光区域的面积是固定的,只能通过减小发光区域之间的间隙,增加发光区域的数量,从而增加发光区域的总面积,在图10中,发光区域之间的间隙减小后,产生的混光被遮光层遮挡住了,无法透射出显示屏,这样,既增大了开口率,也避免了混光影响整个显示屏的显示效果。
基于如上技术方案,本发明实施例还提供了一种终端,包括如上任一所述的显示屏。
在一个示例中,该终端可以为手机、穿戴式设备或平板,例如手表、眼镜等。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。
Claims (14)
- 一种显示屏,其特征在于,包括阴极金属层,设置在所述阴极金属层上表面的封装层,以及设置在所述阴极金属层下表面的有机发光层,所述有机发光层包括非发光区域和多个发光区域;所述显示屏还包括遮光层,所述遮光层设置在所述封装层的上表面,所述遮光层用于遮挡所述有机发光层中的所述非发光区域。
- 根据权利要求1所述的显示屏,其特征在于,所述遮光层的光密度大于或者等于3.0。
- 根据权利要求1或2所述的显示屏,其特征在于,所述遮光层的厚度为1微米。
- 根据权利要求1-3中任意一项所述的显示屏,其特征在于,所述遮光层的材料为铬或者丙烯树脂。
- 根据权利要求1-4中任意一项所述的显示屏,其特征在于,所述显示屏为有机发光二极管显示屏。
- 一种终端,其特征在于,包括如权利要求1-5任一所述的显示屏。
- 根据权利要求6所述的终端,其特征在于,所述终端为手机,穿戴式设备或平板。
- 一种显示屏,其特征在于,包括封装层、遮光层、阴极金属层和有机发光层,所述遮光层位于所述封装层和所述阴极金属层之间,所述有机发光层位于所述阴极金属层的下表面,所述有机发光层包括非发光区域和多个发光区域,所述遮光层用于遮挡所述有机发光层的所述非发光区域。
- 根据权利要求8所述的显示屏,其特征在于,所述遮光层的光密度大于或者等于3.0。
- 根据权利要求8或9所述的显示屏,其特征在于,所述遮光层的厚度为1微米。
- 根据权利要求8-10中任意一项所述的显示屏,其特征在于,所述遮光层的材料为铬或者丙烯树脂。
- 根据权利要求8-11中任意一项所述的显示屏,其特征在于,所述显示屏为有机发光二极管显示屏。
- 一种终端,其特征在于,包括如权利要求8-12任一所述的显示屏。
- 根据权利要求13所述的终端,其特征在于,所述终端为手机,穿戴式设备或平板。
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US20080042136A1 (en) * | 2006-08-16 | 2008-02-21 | Au Optronics Corporation | Pixel Unit Structure of Self-Illumination Display with Low-Reflection |
CN103579283A (zh) * | 2012-08-07 | 2014-02-12 | 乐金显示有限公司 | 有机发光二极管显示器件 |
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US20080042136A1 (en) * | 2006-08-16 | 2008-02-21 | Au Optronics Corporation | Pixel Unit Structure of Self-Illumination Display with Low-Reflection |
CN103579283A (zh) * | 2012-08-07 | 2014-02-12 | 乐金显示有限公司 | 有机发光二极管显示器件 |
US20140077183A1 (en) * | 2012-09-14 | 2014-03-20 | Samsung Display Co., Ltd. | Thin film encapsulation unit, organic light emitting diode display including the same and manufacturing method thereof |
CN203644784U (zh) * | 2013-12-09 | 2014-06-11 | 昆山国显光电有限公司 | 一种有机发光双面显示装置 |
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