CN113299723B - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN113299723B
CN113299723B CN202110602294.5A CN202110602294A CN113299723B CN 113299723 B CN113299723 B CN 113299723B CN 202110602294 A CN202110602294 A CN 202110602294A CN 113299723 B CN113299723 B CN 113299723B
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China
Prior art keywords
display panel
light
sub
pixel
pixels
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Active
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CN202110602294.5A
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CN113299723A (en
Inventor
沈丽梅
张振铖
李静
尹红山
李凯
卢丽君
吴继耀
林冠跃
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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Classifications

    • 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
    • H10K59/351—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • 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
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/852—Arrangements for extracting light from the devices comprising a resonant cavity structure, e.g. Bragg reflector pair
    • 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
    • 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
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]

Abstract

The embodiment of the application provides a display panel and a display device, comprising a light-transmitting display area, wherein the light-transmitting display area comprises a plurality of first red sub-pixels, a plurality of first green sub-pixels, a plurality of first blue sub-pixels and a first white sub-pixel; wherein, a plurality of microcavity structures are arranged in the light-transmitting display area; in a direction along the thickness of the display panel, the projection of the microcavity structure overlaps with the projection of at least one of the first red, green and blue sub-pixels. In the display panel and the display device provided by the embodiment of the application, the light corresponding to the sub-pixels with at least one color in the light-transmitting display area is emitted to the light-emitting surface of the display panel after passing through the microcavity structure, so that the color concentration of the sub-pixels with at least one color in the light-transmitting display area can be increased, and the problem of color gamut reduction of the light-transmitting display area caused by the existence of the first white sub-pixel is solved.

Description

Display panel and display device
[ field of technology ]
The present application relates to the field of display technologies, and in particular, to a display panel and a display device.
[ background Art ]
As consumer demand increases, full screen displays are becoming the dominant display technology. The prior full-screen display is generally provided with a light-transmitting display area in a display area, and the position of the light-transmitting display area is used for arranging an optical device.
The light-transmitting display area can display and transmit external light, in order to ensure the light transmittance of the light-transmitting display area, the pixel density in the light-transmitting display area is generally reduced, and white sub-pixels which do not comprise color resistance or comprise high light-transmitting color resistance are arranged in the light-transmitting display area, and no or few light shielding structures, such as metal wires and pixel circuits, are arranged. However, such a display screen generally has a problem that the color gamut of the transparent display area is reduced.
[ application ]
In view of the above, the embodiments of the present application provide a display panel and a display device to solve the above problems.
In a first aspect, an embodiment of the present application provides a display panel, including a light-transmitting display area, where the light-transmitting display area includes a plurality of first red sub-pixels, a plurality of first green sub-pixels, a plurality of first blue sub-pixels, and a first white sub-pixel; wherein, a plurality of microcavity structures are arranged in the light-transmitting display area; in a direction along the thickness of the display panel, the projection of the microcavity structure overlaps with the projection of at least one of the first red, green and blue sub-pixels.
In one implementation manner of the first aspect, in a direction along a thickness of the display panel, projections of the first red sub-pixel, the first green sub-pixel, and the first blue sub-pixel overlap projections of the microcavity structure.
In one implementation manner of the first aspect, a cavity length of the microcavity structure corresponding to the first red sub-pixel along the thickness direction of the display panel is a first length, a cavity length of the microcavity structure corresponding to the first green sub-pixel along the thickness direction of the display panel is a second length, a cavity length of the microcavity structure corresponding to the first blue sub-pixel along the thickness direction of the display panel is a third length, and the first length, the second length and the third length are different from each other.
In one implementation manner of the first aspect, the microcavity structure includes a total reflection film and a semi-reflection semipermeable film that are oppositely disposed along a thickness direction of the display panel, and the semi-reflection semipermeable film is disposed on a side of the total reflection film, which is close to the light emitting surface of the display panel.
In one implementation manner of the first aspect, the display panel includes a first substrate, a second substrate, and a liquid crystal layer; the first substrate and the second substrate are arranged oppositely, the liquid crystal layer is arranged between the first substrate and the second substrate, and the microcavity structure is arranged on one side of the first substrate facing the liquid crystal layer.
In an implementation manner of the first aspect, the display panel further includes an organic light emitting layer, and the microcavity structure is disposed on a side of the organic light emitting layer facing the light emitting surface of the display panel.
In one implementation manner of the first aspect, the total reflection film and the semi-reflection semi-permeable film are of an organic layer structure.
In an implementation manner of the first aspect, the display panel further includes a color resist layer and an organic protective layer; the total reflection film of the microcavity structures in the light-transmitting display area and the organic protective layer are arranged on the same layer; or the semi-reflective semi-transparent films and the organic protective layer of the microcavity structures in the light-transmitting display area are arranged on the same layer.
In one implementation manner of the first aspect, the total reflection film and the semi-reflection semi-transparent film are both transparent conductive structures.
In an implementation manner of the first aspect, the display panel further includes a common electrode layer; the total reflection films of the microcavity structures in the light-transmitting display area and the common electrode layer are arranged on the same layer; or the semi-reflective semi-transparent films of the microcavity structures in the light-transmitting display area and the common electrode layer are arranged on the same layer.
In an implementation manner of the first aspect, the display panel further includes a metal anode and a transparent conductive cathode, and the organic light-emitting layer is disposed between the metal anode and the transparent conductive cathode; in the light-transmitting display area, the metal anode is used as a total reflection film of the microcavity structure, and the transparent conductive cathode is used as a semi-reflection and semi-transmission film of the microcavity structure. The projection of the first red sub-pixel, the first green sub-pixel and the first blue sub-pixel along the thickness direction of the display panel are overlapped with the projection of the microcavity structure along the thickness direction of the display panel; the thickness of the organic light-emitting layer in the first red sub-pixel along the thickness direction of the display panel is a first thickness, the thickness of the organic light-emitting layer in the first green sub-pixel along the thickness direction of the display panel is a second thickness, the thickness of the organic light-emitting layer in the first blue sub-pixel along the thickness direction of the display panel is a third thickness, and the first thickness, the second thickness and the third thickness are different.
In a second aspect, an embodiment of the present application provides a display device, including the display panel and the optical functional element provided in the first aspect, where the optical functional element is disposed at a position corresponding to a functional display area of the display device.
In the display panel and the display device provided by the embodiments of the present application, light corresponding to at least one color sub-pixel in the light-transmitting display area first passes through the microcavity structure, and the microcavity structure can perform constructive interference on the light of the corresponding sub-pixel area, so that the color concentration of the light of the at least one color sub-pixel is enhanced, and the light with enhanced color concentration is emitted to the light-emitting surface of the display panel. The display panel and the display device provided by the embodiment of the application can increase the color concentration of the sub-pixels with at least one color in the light-transmitting display area, and solve the problem of the reduced color gamut of the light-transmitting display area caused by the existence of the first white sub-pixel.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a display panel according to an embodiment of the present application;
FIG. 2 is a schematic diagram of another display panel according to an embodiment of the present application;
FIG. 3 is an enlarged view of a portion of the AA area of FIGS. 1 and 2;
FIG. 4 is another enlarged view of the area AA shown in FIGS. 1 and 2;
FIG. 5 is a schematic diagram of a microcavity structure in a display panel according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a microcavity structure of a display panel according to an embodiment of the present application;
FIG. 7 is a further enlarged partial view of the AA area of FIGS. 1 and 2;
FIG. 8 is a cross-sectional view of a transparent area of a display panel according to an embodiment of the present application;
FIG. 9 is a cross-sectional view of a light-transmitting area of another display panel according to an embodiment of the present application;
FIG. 10 is a cross-sectional view of a light-transmitting area of a display panel according to another embodiment of the present application;
FIG. 11 is a cross-sectional view of a light-transmitting area of another display panel according to an embodiment of the present application;
FIG. 12 is a cross-sectional view of a light-transmitting area of a display panel according to an embodiment of the present application;
FIG. 13 is a cross-sectional view of a light-transmitting area of a display panel according to another embodiment of the present application;
FIG. 14 is a cross-sectional view of a light-transmitting area of another display panel according to another embodiment of the present application;
FIG. 15 is a cross-sectional view of a light-transmitting area of a display panel according to another embodiment of the present application;
fig. 16 is a schematic diagram of a display device according to an embodiment of the application.
[ detailed description ] of the application
For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the present specification, it is to be understood that the terms "substantially," "approximately," "about," "approximately," "substantially," and the like as used in the claims and embodiments of the application are intended to be inclusive of a reasonable process operation or tolerance and not an exact value.
It should be understood that although the terms first, second, third, etc. may be used to describe the display regions in the embodiments of the present application, these display regions should not be limited to these terms. These terms are only used to distinguish one display region from another. For example, a first display region may also be referred to as a second display region, and similarly, a second display region may also be referred to as a first display region, without departing from the scope of embodiments of the present application.
The applicant has provided a solution to the problems existing in the prior art by intensive studies.
The embodiment of the application provides a display panel and a display device.
Fig. 1 is a schematic diagram of a display panel according to an embodiment of the present application, fig. 2 is a schematic diagram of another display panel according to an embodiment of the present application, fig. 3 is a partial enlarged view of an AA area in fig. 1 and 2, and fig. 4 is another partial enlarged view of the AA area in fig. 1 and 2.
As shown in fig. 1 and 2, the display panel provided in the embodiment of the application may include a light-transmitting display area 01 and a conventional display area 02. As shown in fig. 3 and 4, the transparent display area 01 includes a plurality of first red sub-pixels 101, a plurality of first green sub-pixels 102, a plurality of first blue sub-pixels 103 and a plurality of first white sub-pixels 104, and the conventional display area 02 includes a plurality of second red sub-pixels 201, a plurality of second green sub-pixels 202 and a plurality of second blue sub-pixels 203. The white subpixel 104 is a subpixel which is not provided with a color resistance or is provided with a high light transmittance color resistance.
The first red sub-pixel 101, the first green sub-pixel 102, the first blue sub-pixel 103, and the at least one first white sub-pixel 104 may constitute the first pixel 10. In one implementation of the present embodiment, as shown in fig. 3, the conventional display area 02 does not include a white sub-pixel, and the second red sub-pixel 201, the second green sub-pixel 202, and the second blue sub-pixel 203 form the second pixel 20; in another implementation of the present embodiment, as shown in fig. 4, the conventional display area 02 includes a second white sub-pixel 204, and the second red sub-pixel 201, the second green sub-pixel 202, the second blue sub-pixel 203 and at least one second white sub-pixel 204 form the second pixel 20.
Referring to fig. 3 and 4 in conjunction with fig. 1 and 2, a conventional display area 02 is used for main image display. With continued reference to fig. 3, fig. 4 and fig. 1 and fig. 2, the density of the first pixels 10 in the transparent display area 01 is smaller than that of the second pixels 20 in the conventional display area 02, so that other functions other than image display, such as at least one of photographing, biometric identification, illumination, etc., can be realized; that is, the light-transmitting display area 01 can realize these other functions as well as display images.
In the embodiment of the present application, as shown in fig. 3 and 4, a plurality of microcavity structures 11 are disposed in the light-transmitting display area 01. And in the direction along the thickness of the display panel, the projection of the microcavity structure 11 overlaps with the projection of at least one of the first red sub-pixel 101, the first green sub-pixel 102 and the first blue sub-pixel 103. That is, the light corresponding to the sub-pixel region of at least one color in the transparent display area 01 is emitted to the light emitting surface of the display panel after passing through the microcavity structure 11.
In the embodiment of the present application, since the density of the first pixels 10 in the transparent display area 01 is smaller than the density of the second pixels 20 in the conventional display area 02, the first white sub-pixels 104 are disposed in the transparent display area 01, and meanwhile, when the second white sub-pixels 204 are not disposed in the conventional display area 02, the light transmittance of the transparent display area 01 is greater than the light transmittance in the conventional display area 02, and the brightness of the transparent display area 01 can be ensured to be substantially consistent with the brightness of the conventional display area 02; when the first white sub-pixels 104 are disposed in the transparent display area 01 and the second white sub-pixels 204 are also disposed in the normal display area 02, the number or area of the first white sub-pixels 104 in the first pixels 10 in the transparent display area 01 is larger than the number or area of the second white sub-pixels 204 in the second pixels 20 in the normal display area 01, so that the light transmittance of the transparent display area 01 is also larger than the light transmittance in the normal display area 02, and the brightness of the transparent display area 01 can be ensured to be basically consistent with the brightness of the normal display area 02.
In addition, the light corresponding to the sub-pixel of at least one color in the light-transmitting display area 01 first passes through the microcavity structure 11, and the microcavity structure 11 can perform constructive interference on the light of the sub-pixel area corresponding to the microcavity structure, so that the spectrum of the light of the sub-pixel of at least one color is narrowed, that is, the half-peak width is narrowed, and the light with enhanced color concentration is emitted to the light-emitting surface of the display panel. The display panel and the display device provided by the embodiment of the application can increase the color concentration of the sub-pixel with at least one color in the light-transmitting display area 01, and solve the problem of the reduced color gamut of the light-transmitting display area 01 caused by the existence of the first white sub-pixel 104.
In one implementation of the present embodiment, as shown in fig. 3 and 4, the projections of the first red sub-pixel 101, the first green sub-pixel 102, and the first blue sub-pixel 103 overlap with the projections of the microcavity structure 11 in the direction along the thickness of the display panel. That is, the light corresponding to the sub-pixel regions of all the colors in the transparent display area 01 is required to be emitted to the light emitting surface of the display panel after being enhanced by the constructive interference of the microcavity structure 11.
As shown in fig. 3 and 4, the microcavity structures 11 disposed in the light-transmitting display area 01 specifically include a plurality of first microcavity structures 111, a plurality of second microcavity structures 112 and a plurality of third microcavity structures 113. Wherein in the direction along the thickness of the display panel, the projection of the first red subpixel 101 overlaps the projection of the first microcavity structure 111, the projection of the first green subpixel 102 overlaps the projection of the second microcavity structure 112, and the projection of the first blue subpixel 103 overlaps the projection of the third microcavity structure 113.
In this implementation manner, the light corresponding to all the sub-pixels with color in the light-transmitting display area 01 passes through the corresponding microcavity structure 11 and then is emitted to the light-emitting surface of the display panel, so that the color gamut of the light-transmitting display area 01 can be obviously improved.
Fig. 5 is a schematic diagram of a microcavity structure in a display panel according to an embodiment of the present application, and fig. 6 is another schematic diagram of a microcavity structure in a display panel according to an embodiment of the present application.
In one embodiment corresponding to this implementation, as shown in fig. 5 and 6, the cavity length of the microcavity structure 11 (the first microcavity structure 111) corresponding to the first red subpixel 101 along the thickness direction Z of the display panel is a first length H1, the cavity length of the microcavity structure (the second microcavity structure 112) corresponding to the first green subpixel 102 along the thickness direction Z of the display panel is a second length H2, and the cavity length of the microcavity structure 11 (the third microcavity structure 113) corresponding to the first blue subpixel 103 along the thickness direction Z of the display panel is a third length H3, where the first length H1, the second length H2, and the third length H3 are different.
The cavity length of the microcavity structure 11 is related to the wavelength of the light of the corresponding sub-pixel, in particular by enhancing the color concentration of the light of the sub-pixel by constructive interference. The first microcavity structure 111 has a cavity length capable of constructive interference of light emitted by the first red subpixel 101 to enhance the color concentration of red light, the second microcavity structure 112 has a cavity length capable of constructive interference of light emitted by the first green subpixel 102 to enhance the color concentration of green light, and the third microcavity structure 113 has a cavity length capable of constructive interference of light emitted by the first blue subpixel 103 to enhance the color concentration of blue light.
In one implementation manner of the present disclosure, as shown in fig. 5, since the wavelength of green light is smaller than the wavelength of red light and larger than the wavelength of blue light, the first length H1, the second length H2, and the third length H3 may be designed such that H1 > H2 > H3.
In another implementation manner of the present disclosure, as shown in fig. 6, since the effect of the increase of the color concentration of the blue light on the white balance is greater than the effect of the increase of the color concentrations of the red light and the green light on the white balance, and the effect of the increase of the color concentration of the red light on the white balance is greater than the effect of the increase of the color concentration of the green light on the white balance, the first length H1 may be greater than the second length H2 and less than the third length H, so that the microcavity effect of the second microcavity structure 112 is strongest and the microcavity effect of the third microcavity structure 113 is weakest. The cavity length of the third microcavity structure 113 corresponding to the first blue sub-pixel 103 may be longer such that the color concentration of the light of the first blue sub-pixel 103 in the first pixel 10 increases relatively less, while the cavity length of the second microcavity structure 112 corresponding to the first green sub-pixel 102 may be shorter such that the color concentration of the light of the first green sub-pixel 102 in the first pixel 10 increases relatively more. Therefore, the color density of the light of the first red sub-pixel 101, the first green sub-pixel 102 and the first blue sub-pixel 103 in the first pixel 10 can be increased through the microcavity structure 11 to improve the color gamut of the light-transmitting display area 01, and meanwhile, the light-transmitting display area 01 is ensured to have a good white balance effect.
Fig. 7 is a further enlarged view of the AA area of fig. 1 and 2.
In another implementation of the present embodiment, as shown in fig. 7, in the direction along the thickness of the display panel, the projection of only part of the first red sub-pixel 101, the first green sub-pixel 102 and the first blue sub-pixel 103 overlap with the projection of the microcavity structure 11.
For example, as shown in fig. 7, the microcavity structures 11 disposed in the light-transmitting display area 01 specifically include a plurality of first microcavity structures 111 and a plurality of second microcavity structures 112. Wherein the projection of the first red subpixel 101 overlaps the projection of the first microcavity structure 111 and the projection of the first green subpixel 102 overlaps the projection of the second microcavity structure 112 in the direction along the thickness of the display panel. And the micro-cavity structure 11 is not disposed in the area where the first blue sub-pixel 103 is located. Therefore, white balance can be ensured while increasing the color gamut of the light-transmitting display area 01.
In one technical solution corresponding to this implementation manner, the cavity length of the microcavity structure 11 (the first microcavity structure 111) corresponding to the first red subpixel 101 along the thickness direction Z of the display panel is a first length H1, the cavity length of the microcavity structure (the second microcavity structure 112) corresponding to the first green subpixel 102 along the thickness direction Z of the display panel is a second length H2, and the first length H1 is smaller than the second length H2, so as to ensure the white balance effect in the light-transmitting display area 01.
It should be noted that the following embodiments are described by taking the projection of the first red sub-pixel 101, the first green sub-pixel 102 and the first blue sub-pixel 103 overlapping the projection of the microcavity structure 11 in the direction along the thickness of the display panel as an example, but it is understood that the following schemes can also be applied to the case where only the projections of some of the first red sub-pixel 101, the first green sub-pixel 102 and the first blue sub-pixel 103 overlap the projection of the microcavity structure 11.
In an embodiment of the present application, please continue to refer to fig. 5 and fig. 6, the microcavity structure 11 in the display panel provided by the embodiment of the present application includes a total reflection film and a semi-reflection and semi-transmission film which are oppositely disposed along the thickness direction Z of the display panel, and the semi-reflection and semi-transmission film is disposed on a side of the total reflection film close to the light-emitting surface of the display panel, so that light continuously reflects between the total reflection film and the semi-reflection and semi-transmission film to enable light with a specific wavelength to constructively interfere to obtain a higher color concentration, and finally is emitted from a side of the semi-reflection and semi-transmission film to a side of the light-emitting surface of the display panel. As shown in fig. 5, the first microcavity structure 111 includes a semi-reflective semi-permeable membrane 111a and a total-reflective membrane 111b, the second microcavity structure 112 includes a semi-reflective semi-permeable membrane 112a and a total-reflective membrane 112b, and the third microcavity structure 113 includes a semi-reflective semi-permeable membrane 113a and a total-reflective membrane 113b.
In one embodiment of the present application, the total reflection film 11b and the semi-reflection and semi-transmission film 11a are both organic layer structures.
In another embodiment of the present application, the total reflection film 11b and the semi-reflection and semi-transmission film 11a are both transparent conductive structures.
Fig. 8 is a cross-sectional view of a light-transmitting area of a display panel according to an embodiment of the application, and fig. 9 is a cross-sectional view of a light-transmitting area of another display panel according to an embodiment of the application.
In one embodiment, as shown in fig. 8-9, the display panel includes a first substrate 001, a second substrate 002 and a liquid crystal layer 003, wherein the first substrate 001 and the second substrate 002 are disposed opposite to each other, the liquid crystal layer 003 is disposed between the first substrate 001 and the second substrate 002, and the microcavity structure 11 is disposed on a side of the first substrate 001 facing the liquid crystal layer 003. That is, the technical scheme provided by the embodiment of the application can be applied to a liquid crystal display panel.
In one technical solution corresponding to this implementation manner, as shown in fig. 8-9, the display panel further includes a color blocking layer and an organic protective layer 14, where the color blocking layer and the organic protective layer 14 are also disposed on the first substrate 001 and the organic protective layer 14 is disposed on a side of the color blocking layer facing the liquid crystal layer 003 for protecting the color blocking layer. The color resist layer includes a red color resist 121 corresponding to the first red sub-pixel 101, a green color resist 122 corresponding to the first green sub-pixel 102, and a blue color resist 123 corresponding to the first blue sub-pixel 103, and a black matrix 130 is included between adjacent color resists.
Referring to fig. 9, the total reflection film of the microcavity structures 11 in the light-transmitting display area 01 and the organic protection layer 14 are disposed on the same layer, that is, the portion of the organic protection layer 14 in the area where the first red subpixel 101 is located may be used as the total reflection film 111b of the first microcavity structure 111, the portion of the organic protection layer 14 in the area where the first green subpixel 102 is located may be used as the total reflection film 112b of the second microcavity structure 112, and the portion of the organic protection layer 14 in the area where the first blue subpixel 103 is located may be used as the total reflection film 113b of the third microcavity structure 113. Alternatively, referring to fig. 8, the semi-reflective and semi-transmissive films of the microcavity structures 11 in the light-transmissive display region 01 are disposed on the same layer as the organic protective layer, that is, the portion of the organic protective layer 14 in the region where the first red subpixel 101 is located may be used as the semi-reflective and semi-transmissive film 111a of the first microcavity structure 111, the portion of the organic protective layer 14 in the region where the first green subpixel 102 is located may be used as the semi-reflective and semi-transmissive film 112a of the second microcavity structure 112, and the portion of the organic protective layer 14 in the region where the first blue subpixel 103 is located may be used as the semi-reflective and semi-transmissive film 111a of the third microcavity structure 113.
In one embodiment, as shown in fig. 8, the second substrate 002 includes a plurality of thin film transistors 21 and pixel electrodes 22 thereon, and may further include a common electrode 23. The first substrate 001 is disposed on the side of the second substrate 002 facing the light emitting surface of the display panel. The light emitted from the backlight plate passes through the microcavity structure 11 disposed on the first substrate 001 and then passes through the color resist layer. In general, the backlight plate emits white light, the first microcavity structure 111 performs constructive interference to emit light in a red light band of the white light to the red resistor 121, the second microcavity structure 112 performs constructive interference to emit light in a green light band of the white light to the green resistor 122, and the third microcavity structure 113 performs constructive interference to emit light in a blue light band of the white light to the blue resistor 123.
In this embodiment, the semi-reflective and semi-permeable films of the plurality of microcavity structures 11 in the light-transmissive display region 01 are arranged in the same layer as the organic protective layer 14. In addition, the display panel may further include a first organic layer 15, and the first organic layer 15 is located at a side of the organic protective layer 14 near the liquid crystal layer 03; alternatively, the display panel may further include a first organic layer 15 and a second organic layer 16, where the second organic layer 16 is located between the first organic layer 15 and the organic protective layer 14 is located on a side of the first organic layer 15 away from the liquid crystal layer 03.
In this embodiment, the portion of the organic protective layer 14 in the area where the first red sub-pixel 101 is located may be used as the semi-reflective and semi-permeable film 111a of the first microcavity structure 111, the portion of the organic protective layer 14 in the area where the first green sub-pixel 102 is located may be used as the semi-reflective and semi-permeable film 112a of the second microcavity structure 112, and the portion of the organic protective layer 14 in the area where the first blue sub-pixel 103 is located may be used as the semi-reflective and semi-permeable film 113a of the third microcavity structure 113.
The portion of the first organic layer 15 located in the area of the first red sub-pixel 101 may be used as the total reflection film 111b of the first microcavity structure 111, the portion of the first organic layer located in the area of the first green sub-pixel 102 may be used as the total reflection film 112b of the second microcavity structure 112, and the portion of the first organic layer located in the area of the first blue sub-pixel 103 may be used as the total reflection film 113b of the third microcavity structure 113.
Alternatively, the portions of the first organic layer 15 and the second organic layer 16 located in the region of the first red sub-pixel 101 may be used as the total reflection film 111b of the first microcavity structure 111, the portions of the first organic layer 15 and the second organic layer located in the region of the first green sub-pixel 102 may be used as the total reflection film 112b of the second microcavity structure 112, and the portions of the first organic layer 15 and the second organic layer 16 located in the region of the first blue sub-pixel 103 may be used as the total reflection film 113b of the third microcavity structure 113. The refractive index of the second organic layer 16 may be greater than that of the first organic layer 15, so that light within a certain incident angle range is substantially totally reflected by the total reflection film.
In another embodiment, as shown in fig. 9, the first substrate 002 further includes a plurality of thin film transistors 21 and pixel electrodes 22, and may further include a plurality of common electrodes 23. The color resist layer, the microcavity structure 11, and the thin film transistor 21 are all disposed on the first substrate 001, and the first substrate 001 is disposed on a side of the second substrate 002 facing away from the light emitting surface of the display panel. The light emitted from the backlight plate passes through the color resist layer disposed on the first substrate 001 and then passes through the microcavity structure 11. In general, the light emitted by the backlight plate is white light, which is changed into color light after passing through the color resistance layer, the first microcavity structure 111 performs constructive interference to emit red light after passing through the red color resistance 121 to the second substrate 002, the second microcavity structure 112 performs constructive interference to emit green light after passing through the green color resistance 122 to the second substrate 002, and the third microcavity structure 113 performs constructive interference to emit blue light after passing through the blue color resistance 123 to the second substrate 002.
In this embodiment, the total reflection film of the microcavity structures 11 in the light-transmitting display region 01 is arranged in the same layer as the organic protective layer 14. In addition, the display panel may further include a first organic layer 15, and the first organic layer 15 is located at a side of the organic protective layer 14 near the liquid crystal layer 03; alternatively, the display panel may further include a first organic layer 15 and a second organic layer 16, where the second organic layer 16 is located between the first organic layer 15 and the organic protective layer 14 is located on a side of the first organic layer 15 away from the liquid crystal layer 03.
In this embodiment, the portion of the organic protective layer 14 in the area where the first red sub-pixel 101 is located may be used as the total reflection film 111b of the first microcavity structure 111, the portion of the organic protective layer 14 in the area where the first green sub-pixel 102 is located may be used as the total reflection film 112b of the second microcavity structure 112, and the portion of the organic protective layer 14 in the area where the first blue sub-pixel 103 is located may be used as the total reflection film 113b of the third microcavity structure 113.
Alternatively, the portions of the organic protective layer 14 and the second organic layer 16 located in the region of the first red sub-pixel 101 may be used as the total reflection film 111b of the first microcavity structure 111, the portions of the organic protective layer 14 and the second organic layer located in the region of the first green sub-pixel 102 may be used as the total reflection film 112b of the second microcavity structure 112, and the portions of the organic protective layer 14 and the second organic layer 16 located in the region of the first blue sub-pixel 103 may be used as the total reflection film 113b of the third microcavity structure 113. The refractive index of the second organic layer 16 may be greater than that of the organic protective layer 14, so that light within a certain incident angle range is substantially totally reflected by the total reflection film.
The portion of the first organic layer 15 located in the area where the first red sub-pixel 101 is located may be used as the semi-reflective and semi-permeable film 111a of the first microcavity structure 111, the portion of the first organic layer located in the area where the first green sub-pixel 102 is located may be used as the semi-reflective and semi-permeable film 112a of the second microcavity structure 112, and the portion of the first organic layer located in the area where the first blue sub-pixel 103 is located may be used as the semi-reflective and semi-permeable film 113a of the third microcavity structure 113.
Fig. 10 is a cross-sectional view of a light-transmitting area of another display panel according to an embodiment of the application.
It should be noted that, when the technical solution provided in the embodiment of the present application can be applied to a liquid crystal display panel, as shown in fig. 8 and 9, the common electrode 23 may be disposed at a side of the pixel electrode 22 away from the thin film transistor 21; as shown in fig. 10, the common electrode 23 may also be disposed on a side of the pixel electrode 22 near the thin film transistor 21.
Fig. 11 is a cross-sectional view of a light-transmitting area of a display panel according to an embodiment of the present application, and fig. 12 is a cross-sectional view of a light-transmitting area of a display panel according to an embodiment of the present application.
In another technical solution corresponding to the present implementation manner, the display panel further includes a common electrode layer including the common electrode 23 and a pixel electrode layer including the pixel electrode 22.
The total reflection film 11b of the microcavity structure 11 may be disposed in the same layer as one of the common electrode layer or the pixel electrode layer, or the semi-reflection and semi-transmission film 11a of the microcavity structure 11 may be disposed in the same layer as one of the common electrode layer or the pixel electrode layer.
In one specific implementation, when one of the common electrode layer and the pixel electrode layer is closer to the thin film transistor 21, it may be disposed in the same layer as the total reflection film 11b of the microcavity structure 11.
It should be noted that, when one of the common electrode layer and the pixel electrode layer is disposed on the same layer as the total reflection film 11b of the microcavity structure 11, the one of the common electrode layer and the pixel electrode layer may actually form the total reflection film 11b of the microcavity structure 11 together with the insulating layer. And in the two film layers of the total reflection film 11b forming the microcavity structure 11, the refractive index of the insulating layer may be larger than that of the other film layer, so that light rays within a certain incident angle range are substantially totally reflected by the total reflection film 11b.
As shown in fig. 11, the common electrode layer is closer to the thin film transistor 21 than the pixel electrode layer, and then the total reflection film 11b of the microcavity structures 11 in the light-transmitting display region 01 is disposed at the same layer as the common electrode layer, that is, the common electrode 23 in the first red subpixel 101 may be used as the total reflection film 111b of the first microcavity structure 111, the common electrode 23 in the first green subpixel 102 may be used as the total reflection film 112b of the second microcavity structure 112, and the common electrode 23 in the first blue subpixel 103 may be used as the total reflection film 113b of the third microcavity structure 113.
In one implementation, as shown in fig. 11, the pixel electrode 22 may serve as a semi-reflective semi-permeable membrane 11a of the microcavity structure 11. That is, the pixel electrode 22 in the first red sub-pixel 101 may serve as the semi-reflective and semi-transmissive film 111a of the first microcavity structure 111, the pixel electrode 22 in the first green sub-pixel 102 may serve as the semi-reflective and semi-transmissive film 112a of the second microcavity structure 112, and the pixel electrode 22 in the first blue sub-pixel 103 may serve as the semi-reflective and semi-transmissive film 113a of the third microcavity structure 113.
In another implementation manner, other film layers, such as a touch-related conductive film layer or an insulating layer, located on the side of the common electrode 23 facing the light-emitting surface may be used as the semi-reflective and semi-permeable film 11a or a dedicated film layer may be added as the semi-reflective and semi-permeable film 11a.
As shown in fig. 12, the pixel electrode layer is closer to the thin film transistor 21 than the common electrode layer, and then the total reflection film 11b of the microcavity structures 11 in the light-transmitting display region 01 is disposed at the same layer as the pixel electrode layer, that is, the pixel electrode 22 in the first red subpixel 101 may be used as the total reflection film 111b of the first microcavity structure 111, the pixel electrode 22 in the first green subpixel 102 may be used as the total reflection film 112b of the second microcavity structure 112, and the pixel electrode 22 in the first blue subpixel 103 may be used as the total reflection film 113b of the third microcavity structure 113.
In one implementation, as shown in fig. 12, the common electrode 23 may serve as a semi-reflective and semi-permeable membrane 11a of the microcavity structure 11. That is, the common electrode 23 in the first red sub-pixel 101 may serve as the semi-reflective and semi-transmissive film 111a of the first microcavity structure 111, the common electrode 23 in the first green sub-pixel 102 may serve as the semi-reflective and semi-transmissive film 112a of the second microcavity structure 112, and the common electrode 23 in the first blue sub-pixel 103 may serve as the semi-reflective and semi-transmissive film 113a of the third microcavity structure 113.
In another implementation manner, other film layers, such as a touch-related conductive film layer or an insulating layer, located on the side of the common electrode 23 facing the light-emitting surface may be used as the semi-reflective and semi-permeable film 11a or a dedicated film layer may be added as the semi-reflective and semi-permeable film 11a.
In another embodiment, when one of the common electrode layer and the pixel electrode layer is further away from the thin film transistor 21, it may be disposed in the same layer as the semi-reflective and semi-transmissive film 11a of the microcavity structure 11.
As shown in fig. 11, the pixel electrode layer is further away from the thin film transistor 21 relative to the common electrode layer, and the transflective film 11a of the microcavity structures 11 in the light-transmitting display area 01 is disposed on the same layer as the pixel electrode layer, that is, the pixel electrode 22 in the first red sub-pixel 101 may serve as the transflective film 111a of the first microcavity structure 111, the pixel electrode 22 in the first green sub-pixel 102 may serve as the transflective film 112a of the second microcavity structure 112, and the pixel electrode 22 in the first blue sub-pixel 103 may serve as the transflective film 113a of the third microcavity structure 113.
In one implementation, as shown in fig. 11, the common electrode 23 may be disposed in the same layer as the total reflection film 11b of the microcavity structure 11, that is, the common electrode 23 in the first red subpixel 101 may serve as the total reflection film 111b of the first microcavity structure 111, the common electrode 23 in the first green subpixel 102 may serve as the total reflection film 112b of the second microcavity structure 112, and the common electrode 23 in the first blue subpixel 103 may serve as the total reflection film 113b of the third microcavity structure 113.
In another implementation, other functional film layers on the side of the pixel electrode 22 facing away from the light-emitting surface may be multiplexed into the total reflection film 113b or a dedicated film layer may be added as the total reflection film 113b.
As shown in fig. 12, the common electrode layer is further away from the thin film transistor 21 than the pixel electrode layer, and the transflective films 11a of the microcavity structures 11 in the light-transmitting display region 01 are disposed on the same layer as the common electrode layer, that is, the common electrode 23 in the first red subpixel 101 may serve as the transflective film 111a of the first microcavity structure 111, the common electrode 23 in the first green subpixel 102 may serve as the transflective film 112a of the second microcavity structure 112, and the common electrode 23 in the first blue subpixel 103 may serve as the transflective film 113a of the third microcavity structure 113.
In one implementation, as shown in fig. 12, the pixel electrode 22 may act as a total reflection film 11b of the microcavity structure 11. That is, the pixel electrode 22 in the first red sub-pixel 101 may serve as the total reflection film 111b of the first microcavity structure 111, the pixel electrode 22 in the first green sub-pixel 102 may serve as the total reflection film 112b of the second microcavity structure 112, and the pixel electrode 22 in the first blue sub-pixel 103 may serve as the total reflection film 113b of the third microcavity structure 113.
In another implementation, other functional film layers on the side of the common electrode 23 facing away from the light-emitting surface may be multiplexed into the total reflection film 113b or a dedicated film layer may be added as the total reflection film 113b.
Fig. 13 is a cross-sectional view of a light-transmitting area of another display panel according to another embodiment of the present application, fig. 14 is a cross-sectional view of a light-transmitting area of another display panel according to another embodiment of the present application, and fig. 15 is a cross-sectional view of a light-transmitting area of yet another display panel according to another embodiment of the present application.
In one embodiment, as shown in fig. 13 to 15, the display panel further includes a pixel circuit layer and an organic light emitting layer disposed on the first substrate 001, the pixel circuit layer includes a plurality of pixel circuits 18, the organic light emitting layer includes a plurality of organic light emitting devices 19, and the microcavity structure 11 is disposed on a side of the organic light emitting layer facing the light emitting surface of the display panel. That is, the technical scheme provided by the embodiment of the application can be applied to an organic light-emitting display panel.
As shown in fig. 13, the display panel further includes a color resist layer and an organic protective layer 14, wherein the color resist layer and the organic protective layer 14 are also disposed on the first substrate 001, and the organic protective layer 14 is disposed on a side of the color resist layer facing the light emitting surface of the display panel for protecting the color resist layer. The color resist layer includes a red color resist 121 corresponding to the first red sub-pixel 101, a green color resist 122 corresponding to the first green sub-pixel 102, and a blue color resist 123 corresponding to the first blue sub-pixel 103, and a black matrix 130 is included between adjacent color resists.
In a technical solution corresponding to this embodiment, the total reflection film of the microcavity structures 11 in the light-transmitting display area 01 and the organic protection layer 14 are disposed on the same layer, that is, the portion of the organic protection layer 14 in the area where the first red subpixel 101 is located may be used as the total reflection film 111b of the first microcavity structure 111, the portion of the organic protection layer 14 in the area where the first green subpixel 102 is located may be used as the total reflection film 112b of the second microcavity structure 112, and the portion of the organic protection layer 14 in the area where the first blue subpixel 103 is located may be used as the total reflection film 113b of the third microcavity structure 113. Alternatively, the semi-reflective and semi-transparent films of the microcavity structures 11 in the light-transmitting display area 01 and the organic protective layer are arranged in the same layer, that is, the portion of the organic protective layer 14 in the area where the first red subpixel 101 is located may be used as the semi-reflective and semi-transparent film 111a of the first microcavity structure 111, the portion of the organic protective layer 14 in the area where the first green subpixel 102 is located may be used as the semi-reflective and semi-transparent film 112a of the second microcavity structure 112, and the portion of the organic protective layer 14 in the area where the first blue subpixel 103 is located may be used as the semi-reflective and semi-transparent film 113a of the third microcavity structure 113.
In one embodiment, as shown in fig. 13, the light emitted by the organic light emitting device 19 passes through the color blocking layer disposed on the first substrate 001 and then passes through the microcavity structure 11. Generally, the organic light emitting devices 19 in the sub-pixels with different colors emit light with different colors, for example, the red light emitted by the organic light emitting devices 19 in the first red sub-pixel 101 passes through the red color resistor 121 and then passes through the first microcavity structure 111 and then is emitted from the light emitting surface of the display panel, the green light emitted by the organic light emitting devices 19 in the first green sub-pixel 102 passes through the green color resistor 122 and then passes through the second microcavity structure 112 and then is emitted from the light emitting surface of the display panel, and the blue light emitted by the organic light emitting devices 19 in the first blue sub-pixel 103 passes through the blue color resistor 123 and then passes through the third microcavity structure 113 and then is emitted from the light emitting surface of the display panel.
In this embodiment, the total reflection film of the microcavity structures 11 in the light-transmitting display region 01 is arranged in the same layer as the organic protective layer 14. In addition, the display panel may further include a first organic layer 15 and a second organic layer 16, wherein the second organic layer 16 is located between the first organic layer 15 and the organic protective layer 14, and the first organic layer 15 is located at a side of the organic protective layer 14 away from the organic light emitting device 19.
In this embodiment, the portion of the organic protective layer 14 in the area of the first red sub-pixel 101 may be used as the total reflection film 111b of the first microcavity structure 111, the portion of the organic protective layer 14 in the area of the first green sub-pixel 102 may be used as the total reflection film 112b of the second microcavity structure 112, the portion of the organic protective layer 14 in the area of the first blue sub-pixel 103 may be used as the total reflection film 113b of the third microcavity structure 113, the portion of the first organic layer 15 in the area of the first red sub-pixel 101 may be used as the half-reflection and half-transmission film 111a of the first microcavity structure 111, the portion of the first organic layer 15 in the area of the first green sub-pixel 102 may be used as the half-reflection and half-transmission film 112a of the second microcavity structure 112, and the portion of the first blue sub-pixel 103 in the area may be used as the half-reflection and half-transmission film 113a of the third microcavity structure 113.
In another technical solution corresponding to the present implementation, as shown in fig. 14 and 15, the display panel further includes a common electrode layer, where the common electrode layer includes the cathode 19b of the organic light emitting device 19.
In a specific implementation, as shown in fig. 14, the total reflection film 11b of the microcavity structures 11 in the light-transmitting display area 01 is disposed in the same layer as the common electrode layer, that is, the cathode 19b in the first red subpixel 101 may be used as the total reflection film 111b of the first microcavity structure 111, the cathode 19b in the first green subpixel 102 may be used as the total reflection film 112b of the second microcavity structure 112, and the cathode 19b in the first blue subpixel 103 may be used as the total reflection film 113b of the third microcavity structure 113.
In another specific implementation, as shown in fig. 15, the semi-reflective and semi-permeable films 11a of the multiple microcavity structures 11 in the light-transmissive display area 01 are disposed on the same layer as the common electrode layer, that is, the cathode 19b in the first red subpixel 101 may be used as the semi-reflective and semi-permeable film 111a of the first microcavity structure 111, the cathode 19b in the first green subpixel 102 may be used as the semi-reflective and semi-permeable film 112a of the second microcavity structure 112, and the cathode 19b in the first blue subpixel 103 may be used as the semi-reflective and semi-permeable film 113a of the third microcavity structure 113.
In one embodiment of the present application, as shown in fig. 15, the display panel includes a plurality of organic light emitting devices 19, which are a first organic light emitting device 191 included in the first red subpixel 101, a second organic light emitting device 192 included in the first green subpixel 102, a third organic light emitting device 193 included in the first blue subpixel 103, and a fourth organic light emitting device 194 included in the white subpixel 104, respectively. Each organic light emitting device further includes a metal anode 19a and a transparent conductive cathode 19b, and an organic light emitting layer 19c is disposed between the metal anode 19a and the transparent conductive cathode 19 b. In the light-transmitting display area 01, the metal anode 19a is used as the total reflection film 11b of the microcavity structure 11, and the transparent conductive cathode 19b is used as the semi-reflection and semi-transmission film 11a of the microcavity structure 11. That is, the metal anode 19a and the transparent conductive cathode 19b in the first organic light emitting device 191 are respectively used as the total reflection film 11b and the semi-reflection and semi-transmission film 11a of the first microcavity structure 111, the metal anode 19a and the transparent conductive cathode 19b in the second organic light emitting device 192 are respectively used as the total reflection film 11b and the semi-reflection and semi-transmission film 11a of the second microcavity structure 112, and the metal anode 19a and the transparent conductive cathode 19b in the third organic light emitting device 193 are respectively used as the total reflection film 11b and the semi-reflection and semi-transmission film 11a of the third microcavity structure 113.
The projections of the first red sub-pixel 101, the first green sub-pixel 102, and the first blue sub-pixel 103 along the thickness direction of the display panel overlap with the projection of the microcavity structure 11 along the thickness direction of the display panel. And the organic light emitting layer 19c in the first red subpixel 101 is the first organic light emitting layer 19c1 having a thickness in the display panel thickness direction of the first thickness D1; the organic light emitting layer 19c in the first green sub-pixel 102 is a second organic light emitting layer 19c2 having a thickness in the display panel thickness direction of a second thickness D2; the organic light emitting layer 19c in the first blue subpixel 103 is a third organic light emitting layer 19c3, and the thickness thereof along the thickness direction of the display panel is a third thickness D3, and the first thickness D1, the second thickness D2, and the third thickness D3 are different from each other. The organic light emitting layer 19c in the white subpixel 104 is the fourth organic light emitting layer 19c4 and is capable of emitting white light.
In the embodiment of the present application, the thicknesses of the first organic light emitting layer 19c1, the second organic light emitting layer 19c2, and the third organic light emitting layer 19c3 are set to be different, so that the cavity lengths of the first microcavity structure 111, the second microcavity structure 112, and the third microcavity structure 113 are different. In addition, D1, D2, D3 may be satisfied, D2 < D1 < D3, i.e., the cavity length of the first microcavity structure 111 is greater than the cavity length of the second microcavity structure 112 and less than the cavity length of the third microcavity structure 113.
Fig. 16 is a schematic diagram of a display device according to an embodiment of the present application, and as shown in fig. 16, the display device includes a display panel 001 according to any one of the above embodiments. The display device provided by the embodiment of the application can be a mobile phone, and in addition, the display device provided by the embodiment of the application can also be a display device of a computer, a television and the like.
As shown in fig. 16, the display device provided in the embodiment of the present application further includes an optical device 002, and the optical device 002 is disposed at a position of the display device corresponding to the light-transmitting display area 01 of the display panel 001. That is, the optical device 002 is disposed below the light-transmitting display area 01 of the display panel 001 in the thickness direction of the display panel 001. The optical device 002 may emit light to the light-emitting surface side of the display panel 001 through the light-transmitting display area 01 or may receive light from the light-emitting surface side of the display panel 001 through the light-transmitting display area 01. Wherein the optical device 002 is at least one of an optical fingerprint sensor, an iris recognition sensor, a camera, and a flashlight.
In the embodiment of the present application, the color concentration of the light of the sub-pixel with at least one color in the transparent display area 01 can be increased by emitting the light corresponding to the sub-pixel with at least one color in the transparent display area 01 to the light emitting surface of the display panel after passing through the microcavity structure 11, so as to solve the problem of color gamut reduction of the transparent display area 01 caused by the existence of the first white sub-pixel 104.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the application.

Claims (12)

1. A display panel comprising a light transmissive display region and a conventional display region;
the light-transmitting display area comprises a plurality of first red sub-pixels, a plurality of first green sub-pixels, a plurality of first blue sub-pixels and a plurality of first white sub-pixels; the first red sub-pixel, the first green sub-pixel, the first blue sub-pixel and at least one of the first white sub-pixels form a first pixel;
the conventional display area comprises a plurality of second red sub-pixels, a plurality of second green sub-pixels and a plurality of second blue sub-pixels, and the second red sub-pixels, the second green sub-pixels and the second blue sub-pixels form second pixels; or the conventional display area comprises a plurality of second red sub-pixels, a plurality of second green sub-pixels, a plurality of second blue sub-pixels and a plurality of second white sub-pixels, wherein the second red sub-pixels, the second green sub-pixels, the second blue sub-pixels and at least one second white sub-pixel form a second pixel, and the number or the area of the first white sub-pixels in the first pixel in the light-transmitting display area is larger than the number or the area of the second white sub-pixels in the second pixel in the conventional display area;
The density of the first pixels in the light-transmitting display area is less than the density of the second pixels in the conventional display area;
wherein, a plurality of microcavity structures are arranged in the light-transmitting display area; in a direction along a thickness of the display panel, a projection of the microcavity structure overlaps a projection of at least one of the first red, green, and blue sub-pixels;
the conventional display area does not comprise a microcavity structure;
the projection of the microcavity structure within the light-transmissive display region does not overlap with the projection of the first white subpixel.
2. The display panel of claim 1, wherein projections of the first red, green, and blue sub-pixels all overlap projections of the microcavity structure in a direction along a thickness of the display panel.
3. The display panel of claim 2, wherein a cavity length of the microcavity structure corresponding to the first red subpixel in a thickness direction of the display panel is a first length, a cavity length of the microcavity structure corresponding to the first green subpixel in the thickness direction of the display panel is a second length, and a cavity length of the microcavity structure corresponding to the first blue subpixel in the thickness direction of the display panel is a third length, the first length, the second length, and the third length being different from one another.
4. The display panel according to claim 1, wherein the microcavity structure includes a total reflection film and a semi-reflection and semi-transmission film which are disposed opposite to each other in a thickness direction of the display panel, and the semi-reflection and semi-transmission film is disposed on a side of the total reflection film which is close to a light-emitting surface of the display panel.
5. The display panel of claim 4, wherein the display panel comprises a first substrate, a second substrate, and a liquid crystal layer;
the first substrate and the second substrate are oppositely arranged, the liquid crystal layer is arranged between the first substrate and the second substrate, and the microcavity structure is arranged on one side of the first substrate facing the liquid crystal layer.
6. The display panel of claim 4, further comprising an organic light emitting layer, wherein the microcavity structure is disposed on a side of the organic light emitting layer facing the light exit face of the display panel.
7. The display panel according to claim 5 or 6, wherein the total reflection film and the semi-reflection and semi-transmission film are of an organic layer structure.
8. The display panel of claim 7, further comprising a color resist layer and an organic protective layer;
The total reflection films of the microcavity structures in the light-transmitting display area and the organic protective layer are arranged in the same layer; or the semi-reflective and semi-permeable membranes of the microcavity structures in the light-transmitting display area and the organic protective layer are arranged on the same layer.
9. The display panel of claim 5 or 6, wherein the total reflection film and the semi-reflection and semi-transmission film are transparent conductive structures.
10. The display panel of claim 9, further comprising a common electrode layer;
the total reflection films of the microcavity structures in the light-transmitting display area and the public electrode layer are arranged on the same layer; or the semi-reflective semi-permeable membranes of the microcavity structures in the light-transmitting display area and the common electrode layer are arranged in the same layer.
11. The display panel of claim 6, further comprising a metal anode and a transparent conductive cathode, wherein the organic light emitting layer is disposed between the metal anode and the transparent conductive cathode;
in the light-transmitting display area, the metal anode is used as the total reflection film of the microcavity structure, and the transparent conductive cathode is used as the semi-reflection and semi-transmission film of the microcavity structure;
The projections of the first red sub-pixel, the first green sub-pixel and the first blue sub-pixel along the thickness direction of the display panel overlap with the projection of the microcavity structure along the thickness direction of the display panel; the thickness of the organic light-emitting layer in the first red sub-pixel along the thickness direction of the display panel is a first thickness, the thickness of the organic light-emitting layer in the first green sub-pixel along the thickness direction of the display panel is a second thickness, the thickness of the organic light-emitting layer in the first blue sub-pixel along the thickness direction of the display panel is a third thickness, and the first thickness, the second thickness and the third thickness are different from each other.
12. A display device comprising a display panel according to any one of claims 1-11 and an optical functional element, said optical functional element being arranged in a position of said display device corresponding to said light transmissive display area of said display panel.
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