WO2021120305A1 - 显示面板 - Google Patents

显示面板 Download PDF

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Publication number
WO2021120305A1
WO2021120305A1 PCT/CN2019/129205 CN2019129205W WO2021120305A1 WO 2021120305 A1 WO2021120305 A1 WO 2021120305A1 CN 2019129205 W CN2019129205 W CN 2019129205W WO 2021120305 A1 WO2021120305 A1 WO 2021120305A1
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WO
WIPO (PCT)
Prior art keywords
layer
light
quantum dot
display panel
refraction
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PCT/CN2019/129205
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English (en)
French (fr)
Inventor
梁晓明
Original Assignee
深圳市华星光电半导体显示技术有限公司
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Application filed by 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Priority to US16/633,306 priority Critical patent/US20210183954A1/en
Publication of WO2021120305A1 publication Critical patent/WO2021120305A1/zh

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors

Definitions

  • This application relates to the field of display technology, and in particular to a display panel.
  • Quantum Dot (QD) technology is widely used in display panels because it can improve the color saturation of the display panel.
  • the quantum dot color filter uses blue light to excite the quantum dot to emit red and green light.
  • the quantum dot color filter due to the low conversion efficiency of the quantum dot color filter to blue light, most of the blue light is wasted and the blue light utilization rate is low.
  • the unconverted blue light can be emitted through the quantum dot color filter, thereby affecting the display effect of the display panel.
  • the embodiment of the present application provides a display panel, which can improve the blue light utilization rate.
  • the embodiment of the present application provides a display panel, including:
  • An array substrate the array substrate includes a pixel defining layer, and the pixel defining layer defines a plurality of light emitting units distributed in an array;
  • a color filter substrate is arranged opposite to the array substrate, the color filter substrate includes a black matrix layer, and the black matrix layer surrounds a plurality of pixel regions distributed in an array.
  • the pixel area includes a stacked quantum dot layer and a color filter layer, a refractive layer is provided between the quantum dot layer and the color filter layer, and the quantum dot layer is provided on the color filter substrate Close to the side of the array substrate.
  • the light emitting unit includes a plurality of blue organic light emitting diodes.
  • the pixel area includes a blue light unit, a green light unit or a red light unit
  • the quantum dot layer includes a first transparent material layer, a green light quantum dot layer or a red light quantum dot layer
  • the color film layer includes a second transparent material layer, a green light color film layer or a red light color film layer
  • the refraction layer includes a first refraction layer, a second refraction layer or a third transparent material layer.
  • the refractive index of the first refraction layer and the second refraction layer is greater than or equal to 1, and less than or equal to 1.5.
  • materials of the first refraction layer and the second refraction layer include nitrogen, silicon nitride, or silicon oxide.
  • the first transparent material layer and the second transparent material layer of the blue light unit, and the third transparent material layer is arranged between the first transparent material layer and the second transparent material layer.
  • Transparent material layer is transparent material layer.
  • the green light unit includes the green light quantum dot layer and the green light color film layer, and the green light quantum dot layer and the green light color film layer are provided with the The first refractive layer.
  • the green light quantum dot layer is used to convert the blue light provided by the light emitting unit into green light.
  • the green light color film layer is used to absorb other light sources except green light.
  • the first refraction layer is used to cause partial light sources to be totally reflected at the contact interface between the green light quantum dot layer and the first refraction layer.
  • the critical angle of total reflection of the contact interface between the green light quantum dot layer and the first refractive layer is 33°-69°.
  • the red light unit includes the red light quantum dot layer and the red light color film layer
  • the second light unit is arranged between the red light quantum dot layer and the red light color film layer. Refraction layer.
  • the red light quantum dot layer is used to convert the blue light provided by the light emitting unit into red light.
  • the red light color film layer is used to absorb other light sources except red light.
  • the second refraction layer is used to cause partial light sources to be totally reflected at the contact interface between the red light quantum dot layer and the second refraction layer.
  • the critical angle of total reflection of the contact interface between the red light quantum dot layer and the second refraction layer is 33°-69°.
  • the color filter substrate further includes a base substrate, the base substrate is disposed on a side of the color filter substrate away from the array substrate, and the refraction of the base substrate The rate is 1.5 to 1.6.
  • the critical angle of total reflection of the side of the base substrate away from the array substrate is 26° to 38°.
  • the display panel provided by the embodiments of the present application includes an array substrate, the array substrate includes a pixel defining layer, the pixel defining layer defines a plurality of light-emitting units distributed in an array; a color filter substrate, the color filter substrate and the The array substrates are arranged oppositely, the color filter substrate includes a black matrix layer, the black matrix layer surrounds a plurality of pixel regions distributed in an array, the pixel regions correspond to the light-emitting units, and the pixel regions include stacked arrangements
  • a refractive layer is arranged between the quantum dot layer and the color filter layer, and the quantum dot layer is arranged on the side of the color filter substrate close to the array substrate.
  • a refractive layer is provided between the quantum dot layer and the color film layer in the pixel area of the color filter substrate, so that the contact interface between the quantum dot layer and the refractive layer can be totally reflected, thereby improving the blue light utilization rate of the display panel.
  • FIG. 1 is a schematic structural diagram of a display panel provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a light propagation route of a display panel provided by an embodiment of the present application.
  • the embodiment of the present application provides a display panel, which will be described in detail below.
  • FIG. 1 is a schematic structural diagram of a display panel provided by an embodiment of the present application.
  • the display panel 100 may include an array substrate 10 and a color filter substrate 20. It should be noted that the display panel 100 includes but is not limited to the above structure.
  • the display panel 100 may also include other structures, such as liquid crystal, sealant, etc.
  • the array substrate 10 may include a pixel defining layer 11 and a substrate layer 12.
  • the pixel defining layer 11 may define a plurality of light emitting units 111 distributed in an array.
  • the color filter substrate 20 is disposed opposite to the array substrate 10.
  • the color filter substrate 20 may include a black matrix layer 21 and a base substrate 22.
  • the black matrix layer may be arranged into a plurality of pixel regions 211 distributed in an array. It should be noted that the pixel area 211 corresponds to the light-emitting unit 111. It should be noted that the black matrix layer 21 is disposed on the side of the color filter substrate 20 close to the array substrate 10.
  • the pixel area 211 may include a quantum dot layer 212 and a color filter layer 213 that are stacked.
  • a refractive layer 214 is provided between the quantum dot layer 212 and the color filter layer 213. It should be noted that the quantum dot layer 212 is disposed on the side of the color filter substrate 20 close to the array substrate 10.
  • the light emitting unit 111 may include a plurality of blue organic light emitting diodes, and the blue organic light emitting diodes may be used to provide a blue light source.
  • the pixel area 211 may include any one of the blue light unit 215, the green light unit 216, or the red light unit 217.
  • the quantum dot layer 212 may include any one of a first transparent material layer 2121, a green light quantum dot layer 2122, or a red light quantum dot layer 2123.
  • the color film layer 213 may include any one of the second transparent material layer 2131, the green light color film layer 2132, or the red light color film layer 2133.
  • the refraction layer 214 may include any one of the third transparent material layer 2141, the first refraction layer 2142, or the second refraction layer 2143.
  • first transparent material layer 2121, the second transparent material layer 2131, and the third transparent material layer 2141 are all made of colorless and transparent materials.
  • the first transparent material layer 2121, the second transparent material layer 2131, and the third transparent material layer 2141 cannot block or absorb blue light, and the blue light can directly pass through the first transparent material layer 2121, the second transparent material layer 2131 and the third transparent material
  • the layer 2141 is emitted from the base substrate 22. It can be understood that the third transparent material layer 2141 is disposed between the first transparent material layer 2121 and the second transparent material layer 2131.
  • the green light quantum dot layer 2122 can convert blue light, so that blue light is converted into green light.
  • the green light color film layer 2132 is only for green light to pass through.
  • the red quantum dot layer 2123 can convert blue light, so that blue light is converted into red light.
  • the red light color film layer 2133 only allows red light to pass through.
  • the light-emitting unit 111 in the embodiment of the present application is a blue light-emitting diode, it can directly provide a blue light source. Therefore, in the embodiment of the present application, the blue light unit 215 may be composed of the first transparent material layer 2121, the second transparent material layer 2131, and the third transparent material layer 2141. The blue light can be directly emitted from the base substrate 22 through the first transparent material layer 2121, the second transparent material layer 2131, and the third transparent material layer 2141 to provide a blue display light source of the display panel 100.
  • the blue display light source of the display panel 100 can be directly provided by the light-emitting unit 111, no conversion and other steps are required, and device structures such as a blue quantum dot layer and a blue color film layer are not required, which can save the manufacturing of the display panel 100. cost.
  • the first transparent material layer 2121, the second transparent material layer 2131, and the third transparent material layer 2141 can be directly integrally formed without being manufactured into multiple parts and then assembled.
  • the green light unit 216 can convert the blue light emitted by the light emitting unit 111 into green light emitted from the base substrate 22 to provide a green display light source of the display panel 100.
  • the blue light emitted by the light-emitting unit 111 can be converted into green light by the green light quantum dot layer 2122, and then emitted from the base substrate 22 through the green light color film layer 2132, thereby providing a blue display light source of the display panel 100. It is understandable that the conversion rate of the green light quantum dot layer 2122 to blue light cannot reach 100%.
  • the blue light can be divided into green light and part blue light after passing through the green light quantum dot layer 2122.
  • a green light color film layer 2132 is provided between the green light quantum dot layer 2122 and the base substrate 22.
  • the green light color film layer 2132 can absorb light sources other than green light, and is only for green light. by. At this time, the light source emitted from the base substrate 22 through the green light unit 216 is only green light, which can improve the display effect of the display panel 100.
  • the red light unit 217 can convert the blue light emitted by the light emitting unit 111 into red light emitted from the base substrate 22 to provide a red display light source of the display panel 100.
  • the blue light emitted by the light emitting unit 111 can be converted into red light by the red light quantum dot layer 2123, and then emitted from the base substrate 22 through the red light color film layer 2133, thereby providing a red display light source of the display panel 100.
  • the conversion rate of the red light quantum dot layer 2123 to blue light is not high.
  • the blue light can be divided into red light and part blue light after passing through the red light quantum dot layer 2123.
  • a red light color film layer 2133 is provided between the red light quantum dot layer 2123 and the base substrate 22.
  • the red light color film layer 2133 can absorb light sources other than red light, and is only for red light. by. At this time, the light source emitted from the base substrate 22 through the red light unit 217 is only green light, which can improve the display effect of the display panel 100.
  • a first refractive layer 2142 is provided between the green light quantum dot layer 2122 and the green light color film layer 2132.
  • a second refractive layer 2143 is provided between the red light quantum dot layer 2123 and the red light color film layer 2133. In order to increase the blue light utilization.
  • the blue light emitted by the light-emitting unit 111 passes through the green light unit 216, after the blue light passes through the green light quantum dot layer 2122 to complete the light color conversion, it is emitted from the green light quantum dot layer 2122 to the first refraction layer 2142.
  • Part of the light source can be totally reflected at the contact interface between the green light quantum dot layer 2122 and the first refraction layer 2142, and the reflected light enters the green light quantum dot layer 2122 again, the unconverted blue light undergoes light color conversion, and then the green light quantum dot Layer 2122 is ejected.
  • the conversion rate of blue light can be increased at this time, thereby increasing the utilization rate of blue light and saving the power consumption of the display panel 100. It can be understood that when the blue light passes through the red light unit 217, the specific process is the same as the specific process when the blue light passes through the green light unit 216, and will not be repeated here.
  • the first refraction layer 2142 and the second refraction layer 2143 may be made of materials such as a refractive index greater than or equal to 1, and less than or equal to 1.5.
  • the green light quantum dot layer 2122 in order to improve the total reflection efficiency of the contact interface between the green light quantum dot layer 2122 and the first refraction layer 2142 or the total reflection efficiency of the contact interface between the red light quantum dot layer 2123 and the second refraction layer 2143, can be The refractive index of the dot layer 2122 and the red light quantum dot layer 2123 is adjusted to 1.6-1.8. It can be understood that the greater the difference in refractive index between the green light quantum dot layer 2122 and the first refraction layer 2142 or the red light quantum dot layer 2123 and the second refraction layer 2143, the smaller the critical angle for total reflection. At this time, the critical angle for total reflection at the contact interface between the green light quantum dot layer 2122 and the first refraction layer 2142 or the contact interface between the red light quantum dot layer 2123 and the second refraction layer 2143 is 33°-69°.
  • the base substrate 22 may be a glass substrate or a polyimide substrate.
  • the substrate 22 may be a glass substrate or a polyimide substrate.
  • the refractive index of the base substrate 22 is 1.5-1.6, and the critical angle for total reflection at the contact interface between the base substrate 22 and the air is 26°-38°. That is, the critical angle of total reflection on the side of the base substrate 22 away from the array substrate 10 is 26°-38°.
  • the contact interface between the green light quantum dot layer 2122 and the first refraction layer 2142 or the contact interface between the red light quantum dot layer 2123 and the second refraction layer 2143 When the critical angle of total reflection of the contact interface is 38°, the light source converted by the green light quantum dot layer 2122 or the red light quantum dot layer 2123 is at the contact interface between the green light quantum dot layer 2122 and the first refraction layer 2142 or the red light quantum dot layer 2123 and the first refraction layer 2142.
  • the incident angle of the contact interface of the two refractive layer 2143 will be less than 38°, and this part of the light source will no longer be totally reflected at the contact interface of the base substrate 22 and the air. Therefore, the loss caused by the total reflection of the light source at the contact interface between the base substrate 22 and the air is reduced.
  • the display panel 100 provided by the embodiment of the present application includes an array substrate 10, the array substrate 10 includes a pixel defining layer 11, and the pixel defining layer 11 defines a plurality of light emitting units 111 distributed in an array; a color filter substrate 20, The color filter substrate 20 is disposed opposite to the array substrate 10, and the color filter substrate 20 includes a black matrix layer 21, the black matrix layer 21 surrounds a plurality of pixel regions 211 distributed in an array, and the pixel regions 211
  • the pixel area 211 includes a stacked quantum dot layer 212 and a color film layer 213, and a refractive layer 214 is provided between the quantum dot layer 212 and the color film layer 213.
  • the quantum dot layer 212 is disposed on the side of the color filter substrate 20 close to the array substrate 10.
  • the refractive layer 214 is provided between the quantum dot layer 212 and the color film layer 213 in the pixel area 211 of the color filter substrate 20, so that the contact interface between the quantum dot layer 212 and the refractive layer 214 can be totally reflected, thereby improving the display panel 100. Blu-ray utilization.

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Abstract

本申请提供的显示面板包括:阵列基板,阵列基板包括像素界定层,像素界定层限定出阵列分布的多个发光单元;彩膜基板,彩膜基板与阵列基板相对设置,彩膜基板包括黑色矩阵层,黑色矩阵层围设成阵列分布的多个像素区域,像素区域与发光单元对应,像素区域包括层叠设置的量子点层和彩膜层,量子点层和彩膜层之间设置有折射层,量子点层设置于彩膜基板靠近阵列基板的一侧。

Description

显示面板 技术领域
本申请涉及显示技术领域,尤其涉及一种显示面板。
背景技术
随着显示技术的发展,量子点(Quantum Dot,QD)技术由于可以提高显示面板的色彩饱和度而被广泛应用到显示面板中。
在实际应用中,量子点彩色滤光片是采用蓝光激发量子点发出红光和绿光。然而,由于量子点彩色滤光片对蓝光的转换效率不高,会导致大部分的蓝光被浪费,蓝光利用率低。并且,未转换的蓝光可以透过量子点彩色滤光片射出,从而影响显示面板的显示效果。
技术问题
在量子点技术的实际应用中,量子点彩色滤光片对蓝光的转换效率不高,会导致大部分的蓝光被浪费。
技术解决方案
本申请实施例提供了一种显示面板,可以提高蓝光利用率。
本申请实施例提供了一种显示面板,包括:
阵列基板,所述阵列基板包括像素界定层,所述像素界定层限定出阵列分布的多个发光单元;
彩膜基板,所述彩膜基板与所述阵列基板相对设置,所述彩膜基板包括黑色矩阵层,所述黑色矩阵层围设成阵列分布的多个像素区域,所述像素区域与所述发光单元对应,所述像素区域包括层叠设置的量子点层和彩膜层,所述量子点层和所述彩膜层之间设置有折射层,所述量子点层设置于所述彩膜基板靠近所述阵列基板的一侧。
在本申请实施例提供的显示面板中,所述发光单元包括多个蓝色有机发光二极管。
在本申请实施例提供的显示面板中,所述像素区域包括蓝光单元、绿光单元或红光单元,所述量子点层包括第一透明材料层、绿光量子点层或红光量子点层,所述彩膜层包括第二透明材料层、绿光彩膜层或红光彩膜层,所述折射层包括第一折射层、第二折射层或第三透明材料层。
在本申请实施例提供的显示面板中,所述第一折射层和所述第二折射层的折射率大于或等于1,且小于或等于1.5。
在本申请实施例提供的显示面板中,所述第一折射层和所述第二折射层的材料包括氮气、氮化硅或氧化硅。
在本申请实施例提供的显示面板中,所述蓝光单元第一透明材料层和第二透明材料层,所述第一透明材料层和所述第二透明材料层之间设置有所述第三透明材料层。
在本申请实施例提供的显示面板中,所述绿光单元包括所述绿光量子点层和所述绿光彩膜层,所述绿光量子点层和所述绿光彩膜层之间设置有所述第一折射层。
在本申请实施例提供的显示面板中,所述绿光量子点层用于将所述发光单元提供的蓝光转换为绿光。
在本申请实施例提供的显示面板中,所述绿光彩膜层用于吸收除绿光以外的其他光源。
在本申请实施例提供的显示面板中,所述第一折射层用于使得部分光源在所述绿光量子点层与所述第一折射层的接触界面发生全反射。
在本申请实施例提供的显示面板中,所述绿光量子点层与所述第一折射层的接触界面的全反射临界角为33°-69°。
在本申请实施例提供的显示面板中,所述红光单元包括所述红光量子点层和所述红光彩膜层,所述红光量子点层和红光彩膜层之间设置有所述第二折射层。
在本申请实施例提供的显示面板中,所述红光量子点层用于将所述发光单元提供的蓝光转换为红光。
在本申请实施例提供的显示面板中,所述红光彩膜层用于吸收除红光以外的其他光源。
在本申请实施例提供的显示面板中,所述第二折射层用于使得部分光源在所述红光量子点层与所述第二折射层的接触界面发生全反射。
在本申请实施例提供的显示面板中,所述红光量子点层与所述第二折射层的接触界面的全反射临界角为33°-69°。
在本申请实施例提供的显示面板中,所述彩膜基板还包括衬底基板,所述衬底基板设置于所述彩膜基板远离所述阵列基板的一侧,所述衬底基板的折射率为1.5至1.6。
在本申请实施例提供的显示面板中,所述衬底基板远离所述阵列基板的一侧的全反射临界角为26°至38°。
有益效果
由上,本申请实施例提供的显示面板包括阵列基板,所述阵列基板包括像素界定层,所述像素界定层限定出阵列分布的多个发光单元;彩膜基板,所述彩膜基板与所述阵列基板相对设置,所述彩膜基板包括黑色矩阵层,所述黑色矩阵层围设成阵列分布的多个像素区域,所述像素区域与所述发光单元对应,所述像素区域包括层叠设置的量子点层和彩膜层,所述量子点层和所述彩膜层之间设置有折射层,所述量子点层设置于所述彩膜基板靠近所述阵列基板的一侧。本方案通过在彩膜基板的像素区域的量子点层和彩膜层之间设置折射层,可以使量子点层与折射层接触界面发生全反射,从而提高显示面板的蓝光利用率。
附图说明
图1是本申请实施例提供的显示面板的结构示意图。
图2是本申请实施例提供的显示面板的光传播路线示意图。
本发明的实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述。显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
本申请实施例提供了一种显示面板,以下将进行详细说明。
请参阅图1,图1是本申请实施例提供的显示面板的结构示意图。该显示面板100可以包括阵列基板10和彩膜基板20。需要说明的是,该显示面板100包括但不限于以上结构。该显示面板100还可以包括其他结构,比如液晶、框胶等。
其中,阵列基板10可以包括像素界定层11和衬底层12。该像素界定层11可以限定出阵列分布的多个发光单元111。
其中,彩膜基板20与阵列基板10相对设置。该彩膜基板20可以包括黑色矩阵层21和衬底基板22。该黑色矩阵层可以围设成阵列分布的多个像素区域211。需要说明的是,该像素区域211与发光单元111对应。需要说明的是,黑色矩阵层21设置于彩膜基板20靠近阵列基板10的一侧。
其中,该像素区域211可以包括层叠设置的量子点层212和彩膜层213。并且,在该量子点层212和彩膜层213之间设置有折射层214。需要说明的是,该量子点层212设置于彩膜基板20靠近阵列基板10的一侧。
在一些实施例中,发光单元111可以包括多个蓝色有机发光二极管,该蓝色有机发光二极管可以用于提供蓝色光源。该像素区域211可以包括蓝光单元215、绿光单元216或红光单元217中的任意一个。该量子点层212可以包括第一透明材料层2121、绿光量子点层2122或红光量子点层2123的任意一个。该彩膜层213可以包括第二透明材料层2131、绿光彩膜层2132或红光彩膜层2133的任意一个。该折射层214可以包括第三透明材料层2141、第一折射层2142或第二折射层2143的任意一个。
需要说明的是,第一透明材料层2121、第二透明材料层2131和第三透明材料层2141均是由无色透明材料构成。第一透明材料层2121、第二透明材料层2131和第三透明材料层2141无法对蓝光形成阻挡或吸收,蓝光可以直接通过第一透明材料层2121、第二透明材料层2131和第三透明材料层2141从衬底基板22射出。可以理解的是,第三透明材料层2141设置于第一透明材料层2121和第二透明材料层2131之间。
需要说明的是,在本申请的描述中,术语“第一”、“第二”、“第三”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”、“第三”的特征可以明示或者隐含地包括一个或者更多个所述特征。
需要说明的是,绿光量子点层2122可以对蓝光进行转换,使得蓝光转换为绿光。绿光彩膜层2132仅供绿光通过。红色量子点层2123可以对蓝光进行转换,使得蓝光转换为红光。红光彩膜层2133仅供红光通过。
由于本申请实施例中的发光单元111为蓝色发光二极管,可以直接提供蓝光光源。因此,在本申请实施例中,蓝光单元215可以由第一透明材料层2121、第二透明材料层2131和第三透明材料层2141构成。蓝光可以直接通过第一透明材料层2121、第二透明材料层2131和第三透明材料层2141从衬底基板22射出,以提供显示面板100的蓝色显示光源。可以理解的是,由于显示面板100的蓝色显示光源可以直接由发光单元111提供,无需再进行转换等步骤,无需蓝光量子点层和蓝光彩膜层等器件结构,可以节省显示面板100的制造成本。
在一些实施例中,为了减少制作工序,节省人力资源,第一透明材料层2121、第二透明材料层2131和第三透明材料层2141可以直接一体成型,无需制造成多个部分再进行组装。
在本申请实施例中,绿光单元216可以将发光单元111发射的蓝光转换为绿光从衬底基板22射出,以提供显示面板100的绿色显示光源。具体的,发光单元111发射的蓝光可以由绿光量子点层2122转换为绿光,然后再通过绿光彩膜层2132从衬底基板22射出,从而提供显示面板100的蓝色显示光源。可以理解的是,绿光量子点层2122对蓝光的转换率无法达到100%,蓝光通过绿光量子点层2122后可以分为绿光和部分蓝色,若是绿光和部分蓝色直接从衬底基板22射出,会对显示面板100的显示效果产生影响。因此,在本申请实施例中,在绿光量子点层2122和衬底基板22之间设置了绿光彩膜层2132,该绿光彩膜层2132可以吸收除绿光以外的其他光源,仅供绿光通过。此时通过绿光单元216从衬底基板22射出的光源只有绿光,可以提升显示面板100的显示效果。
在本申请实施例中,红光单元217可以将发光单元111发射的蓝光转换为红光从衬底基板22射出,以提供显示面板100的红色显示光源。具体的,发光单元111发射的蓝光可以由红光量子点层2123转换为红光,然后再通过红光彩膜层2133从衬底基板22射出,从而提供显示面板100的红色显示光源。可以理解的是,红光量子点层2123对蓝光的转换率并不高,蓝光通过红光量子点层2123后可以分为红光和部分蓝色,若是红光和部分蓝色直接从衬底基板22射出,会对显示面板100的显示效果产生影响。因此,在本申请实施例中,在红光量子点层2123和衬底基板22之间设置了红光彩膜层2133,该红光彩膜层2133可以吸收除红光以外的其他光源,仅供红光通过。此时通过红光单元217从衬底基板22射出的光源只有绿光,可以提升显示面板100的显示效果。
可以理解的是,由于绿光量子点层2122和红光量子点层2123对蓝光的转换率并不高,因此大部分未被转换的蓝光会被绿光彩膜层2132或红光彩膜层2133吸收,导致大部分蓝光被浪费,从而导致显示面板100的功耗增加。
为了解决以上问题,在本申请实施例中,在绿光量子点层2122和绿光彩膜层2132之间设置有第一折射层2142。在红光量子点层2123和红光彩膜层2133之间设置有第二折射层2143。以此增加蓝光利用率。
具体可以如图2所示,比如,当发光单元111发射的蓝光经过绿光单元216时,蓝光经过绿光量子点层2122完成光色转换后,由绿光量子点层2122射向第一折射层2142,部分光源可以在绿光量子点层2122与第一折射层2142的接触界面发生全反射,反射光再次射入绿光量子点层2122,未被转换的蓝光进行光色转换,然后再从绿光量子点层2122射出。可以理解的是,此时可以提高蓝光的转换率,从而提高蓝光的利用率,节省显示面板100的功耗。可以理解的是,当蓝光通过红光单元217时,其具体流程如蓝光经过绿光单元216时的具体流程相同,在此不再一一赘述。
需要说明的是,在本申请实施例中,该第一折射层2142和第二折射层2143可以由折射率大于或等于1,且小于或等于1.5等材料构成。比如,氮气、氮化硅或氧化硅等折射率为1的无机材料,或折射率在1-1.5之间的有机小分子或有机高分子材料。也即,该第一折射层2142和第二折射层2143的折射率大于或等于1,且小于或等于1.5。
在本申请实施例中,为了提高绿光量子点层2122与第一折射层2142的接触界面的全反射或红光量子点层2123与第二折射层2143的接触界面的全反射效率,可以将绿光量子点层2122和红光量子点层2123的折射率调整至1.6-1.8。可以理解的是,绿光量子点层2122与第一折射层2142或红光量子点层2123与第二折射层2143的折射率差别越大,发生全反射的临界角越小。此时,绿光量子点层2122与第一折射层2142的接触界面或红光量子点层2123与第二折射层2143的接触界面发生全反射的临界角为33°-69°。
可以理解的是,当光源从彩膜基板20的衬底基板22射出时,同样会在衬底基板22与空气的接触界面发生全反射,在一定程度上会造成光源的损耗。
为了降低光源在衬底基板22与空气的接触界面发生全反射时所造成的损耗,在本申请实施例中,该衬底基板22可以为玻璃基板或聚酰亚胺基板,此时,该衬底基板22的折射率为1.5-1.6,该衬底基板22与空气的接触界面发生全反射的临界角为26°-38°。也即,该衬底基板22远离阵列基板10一侧的全反射临界角为26°-38°。
此时,比如当衬底基板22与空气的接触界面的全反射临界角为38°,绿光量子点层2122与第一折射层2142的接触界面或红光量子点层2123与第二折射层2143的接触界面的全反射临界角为38°时,经过绿光量子点层2122或红光量子点层2123转换的光源在绿光量子点层2122与第一折射层2142的接触界面或红光量子点层2123与第二折射层2143的接触界面的入射角会小于38°,这部分光源在衬底基板22与空气的接触界面不会再发生全反射。从而降低了光源在衬底基板22与空气的接触界面发生全反射时所造成的损耗。
由上,本申请实施例提供的显示面板100包括阵列基板10,所述阵列基板10包括像素界定层11,所述像素界定层11限定出阵列分布的多个发光单元111;彩膜基板20,所述彩膜基板20与所述阵列基板10相对设置,所述彩膜基板20包括黑色矩阵层21,所述黑色矩阵层21围设成阵列分布的多个像素区域211,所述像素区域211与所述发光单元111对应,所述像素区域211包括层叠设置的量子点层212和彩膜层213,所述量子点层212和所述彩膜层213之间设置有折射层214,所述量子点层212设置于所述彩膜基板20靠近所述阵列基板10的一侧。本方案通过在彩膜基板20的像素区域211的量子点层212和彩膜层213之间设置折射层214,可以使量子点层212与折射层214接触界面发生全反射,从而提高显示面板100的蓝光利用率。
以上对本申请实施例所提供的一种显示面板进行了详细介绍,本文中应用了具体个例对本申请的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想;本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (18)

  1. 一种显示面板,其包括:
    阵列基板,所述阵列基板包括像素界定层,所述像素界定层限定有阵列分布的多个发光单元;
    彩膜基板,所述彩膜基板与所述阵列基板相对设置,所述彩膜基板包括黑色矩阵层,所述黑色矩阵层围设有阵列分布的多个像素区域,所述像素区域与所述发光单元对应,所述像素区域包括层叠设置的量子点层和彩膜层,所述量子点层和所述彩膜层之间设置有折射层,所述量子点层设置于所述彩膜基板靠近所述阵列基板的一侧。
  2. 如权利要求1所述的显示面板,其中,所述发光单元包括多个蓝色有机发光二极管。
  3. 如权利要求2所述的显示面板,其中,所述像素区域包括蓝光单元、绿光单元或红光单元,所述量子点层包括第一透明材料层、绿光量子点层或红光量子点层,所述彩膜层包括第二透明材料层、绿光彩膜层或红光彩膜层,所述折射层包括第三透明材料层、第一折射层或第二折射层。
  4. 如权利要求3所述的显示面板,其中,所述第一折射层和所述第二折射层的折射率大于或等于1,且小于或等于1.5。
  5. 如权利要求3所述的显示面板,其中,所述第一折射层和所述第二折射层的材料包括氮气、氮化硅或氧化硅。
  6. 如权利要求3所述的显示面板,其中,所述蓝光单元包括第一透明材料层和第二透明材料层,所述第一透明材料层和所述第二透明材料层之间设置有所述第三透明材料层。
  7. 如权利要求3所述的显示面板,其中,所述绿光单元包括所述绿光量子点层和所述绿光彩膜层,所述绿光量子点层和所述绿光彩膜层之间设置有所述第一折射层。
  8. 如权利要求7所述的显示面板,其中,所述绿光量子点层用于将所述发光单元提供的蓝光转换为绿光。
  9. 如权利要求7所述的显示面板,其中,所述绿光彩膜层用于吸收除绿光以外的其他光源。
  10. 如权利要求7所述的显示面板,其中,所述第一折射层用于使得部分光源在所述绿光量子点层与所述第一折射层的接触界面发生全反射。
  11. 如权利要求10所述的显示面板,其特征在于,所述绿光量子点层与所述第一折射层的接触界面的全反射临界角为33°-69°。
  12. 如权利要求3所述的显示面板,其中,所述红光单元包括所述红光量子点层和所述红光彩膜层,所述红光量子点层和红光彩膜层之间设置有所述第二折射层。
  13. 如权利要求12所述的显示面板,其中,所述红光量子点层用于将所述发光单元提供的蓝光转换为红光。
  14. 如权利要求12所述的显示面板,其中,所述红光彩膜层用于吸收除红光以外的其他光源。
  15. 如权利要求12所述的显示面板,其中,所述第二折射层用于使得部分光源在所述红光量子点层与所述第二折射层的接触界面发生全反射。
  16. 如权利要求15所述的显示面板,其中,所述红光量子点层与所述第二折射层的接触界面的全反射临界角为33°-69°。
  17. 如权利要求1所述的显示面板,其中,所述彩膜基板还包括衬底基板,所述衬底基板设置于所述彩膜基板远离所述阵列基板的一侧,所述衬底基板的折射率为1.5至1.6。
  18. 如权利要求17所述的显示面板,其中,所述衬底基板远离所述阵列基板的一侧的全反射临界角为26°至38°。
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