CN115498000A - Display panel and display device - Google Patents

Abstract

The application discloses display panel and display device relates to and shows technical field, can improve display panel's luminous efficacy, and then can reduce the consumption and improve the life-span. A display panel, comprising: a substrate layer; the pixel units are arranged on one side of the substrate layer; at least one optical adjusting layer arranged on one side of the pixel unit far away from the substrate layer; the optical adjustment layer is used for transmitting first circular polarized light and blocking second circular polarized light, wherein the first circular polarized light and the second circular polarized light are different in rotating direction, so that the second circular polarized light is converted into the first circular polarized light through reflection and then transmitted through the optical adjustment layer.

Description

Display panel and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel and a display device.

Background

At present, with the rapid development of display technologies, more and more functions are integrated on a display panel, and in addition, the overall screen appearance with a high screen ratio is more and more common. In order to meet the requirements of display driving, appearance optimization or other functions, more and more electrodes and wires are integrated in the display panel, and materials adopted by part of the electrodes and the wires have a light reflecting effect. The structure having the light reflection effect may cause a large amount of reflection of ambient light outside the display panel, may cause interference of reflected light of the display panel with display light, and may reduce contrast and visibility of the display panel.

However, the reflection reduction of the display panel generally causes a reduction of the light-emitting efficiency of the display panel, that is, the light-emitting efficiency of the display panel for emitting light for displaying a picture is reduced while the ambient light reflection efficiency of the display panel is reduced, and thus the power consumption and the service life of the display panel are affected.

Disclosure of Invention

The embodiment of the application provides a display panel and a display device, which can improve the light-emitting efficiency of the display panel, and further reduce the power consumption of the display panel and prolong the service life of the display panel.

In a first aspect of embodiments of the present application, a display panel is provided, including:

a substrate layer;

the pixel units are arranged on one side of the substrate layer;

at least one optical adjusting layer arranged on one side of the pixel unit far away from the substrate layer;

the optical adjustment layer is used for transmitting first circular polarized light and blocking second circular polarized light, wherein the first circular polarized light and the second circular polarized light are different in rotating direction, so that the second circular polarized light is converted into the first circular polarized light through reflection and then transmitted through the optical adjustment layer.

In some embodiments, the optically modifying layer comprises a cholesteric liquid crystal layer.

In some embodiments, the optically modifying layer comprises a plurality of modifying regions;

the pixel unit comprises a plurality of sub-pixels, different sub-pixels are used for emitting or transmitting light rays with different colors, and the orthographic projection of the adjusting area on the substrate layer covers the orthographic projection of the sub-pixels on the substrate layer;

the central wavelength ranges of the adjusting regions corresponding to different sub-pixels are different, and the central wavelength range corresponding to the adjusting region is the wavelength range corresponding to the first circular polarized light.

In some embodiments, in case the optical adjusting layer comprises the cholesteric liquid crystal layer, the helical pitch of the helically arranged liquid crystal molecules of the cholesteric liquid crystal layer is determined according to the central wavelength range corresponding to the adjustment area.

In some embodiments, the optical adjustment layer is disposed in the same layer, and the adjustment regions corresponding to all the different sub-pixels belong to the same layer.

In some embodiments, the optical adjustment layers to which the adjustment regions corresponding to at least two different sub-pixels belong are arranged in the same layer.

In some embodiments, the number of layers of the optical adjustment layer is the same as the number of types of the sub-pixels in each pixel unit, each layer of the optical adjustment layer corresponds to one type of target sub-pixel, each layer of the optical adjustment layer includes a plurality of adjustment regions and a normally transmissive region, the adjustment regions are used for transmitting the first circularly polarized light corresponding to the target sub-pixel and blocking the second circularly polarized light, and the normally transmissive region is used for transmitting light of the sub-pixels except the target sub-pixel.

In some embodiments, the normally transmissive region includes a color filter.

In some embodiments, the pixel unit includes a plurality of sub-pixels, different sub-pixels are configured to emit or transmit light of different colors, the number of layers of the optical adjustment layer is the same as the number of types of the sub-pixels in each pixel unit, different layers of the optical adjustment layer correspond to different sub-pixels, and the central wavelength ranges of the different layers of the optical adjustment layer are different.

In some embodiments, the pixel unit includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel;

the central wavelength range corresponding to the red sub-pixel is 600nm to 650nm, and the half-peak width of the spectrum of the optical adjustment layer corresponding to the red sub-pixel is 5nm to 100nm; and/or the presence of a gas in the gas,

the central wavelength range corresponding to the green sub-pixel is 520nm to 550nm, and the half-peak width of the spectrum of the optical adjusting layer corresponding to the green sub-pixel is 5nm to 100nm; and/or the presence of a gas in the gas,

the central wavelength range corresponding to the blue sub-pixel is 450nm to 480nm, and the half-peak width of the spectrum of the optical adjustment layer corresponding to the blue sub-pixel is 5nm to 100nm.

In some embodiments, the display panel further comprises:

the circular polarizer is arranged on one side, far away from the substrate layer, of the optical adjusting layer;

the circular polarizer includes a linear polarizer and a phase retardation film disposed between the optical adjustment layer and the linear polarizer.

In some embodiments, the phase retardation film comprises a first phase retardation film and a second phase retardation film;

the included angle between the slow axis of the first phase retardation film and the absorption axis of the linear polaroid is a first angle, the included angle between the slow axis of the second phase retardation film and the absorption axis of the linear polaroid is a second angle, and the second angle and the first angle are in a linear relation.

In some embodiments, the first phase retardation film is a half-wave plate and the second phase retardation film is a quarter-wave plate; and/or the presence of a gas in the gas,

the first phase retardation film and/or the second phase retardation film includes a cholesteric liquid crystal layer.

In some embodiments, the display panel further includes:

the packaging layer is arranged between the pixel unit and the optical adjusting layer;

the touch layer is arranged between the packaging layer and the optical adjusting layer, or the touch layer is arranged on one side, far away from the substrate layer, of the optical adjusting layer.

In a second aspect of the embodiments of the present application, there is provided a display device including:

the display panel according to the first aspect.

The embodiment of the application provides a display panel and display device adjusts the layer through setting up optics, and optics adjusts the layer and is used for passing through first circular polarisation to block second circular polarisation, the rotation direction of first circular polarisation and second circular polarisation is different, so that second circular polarisation passes through behind the reflection conversion first circular polarisation from optics adjustment layer and sees through. The light emitted or transmitted by the pixel unit is emitted from the optical adjusting layer without loss, so that the light emitting amount of the display panel can be greatly improved, and the light emitting efficiency of a display picture of the display panel is further improved. The improvement of display panel's luminous efficiency can reduce display panel's drive power consumption, and in the display effect of the same light-emitting volume promptly, the drive power consumption of the display panel that this application embodiment provided is lower, can further improve display panel's life. In addition, the external ambient light of display panel penetrates into the optical adjustment layer from the display side of display panel, and inside first circular polarized light penetrated and penetrated into the display panel, the second circular polarized light was reflected, blocked outside the display panel, can reduce the external ambient light and penetrated into in the display panel. The first circular polarized light that sees through takes place the conversion of turning round through the reflection of display panel internal reflection structure, obtains the second circular polarized light, and the second circular polarized light incides the optics regulating layer once more and can't see-through, can be blockked and can't be emergent in display panel inside, can reduce display panel to the reflection light yield of ambient light, plays the effect that reduces ambient light reflectivity, and ambient light's reflectivity can keep at lower level, can not influence display panel's normal demonstration.

Drawings

Fig. 1 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

fig. 2 is a schematic optical path diagram of a display panel according to an embodiment of the present disclosure;

fig. 3 is a schematic view of another optical path of the display panel according to the embodiment of the present application;

fig. 4 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of another display panel provided in an embodiment of the present application;

fig. 9 is a schematic view of another optical path of a display panel according to an embodiment of the present disclosure;

fig. 10 is a schematic structural view of a circular polarizer provided in an embodiment of the present application;

fig. 11 is a reflection spectrum of an optical adjustment layer of a display panel according to an embodiment of the present disclosure;

fig. 12 is a white light spectrum of a display panel according to an embodiment of the present disclosure;

fig. 13 shows a red light spectrum of a display panel according to an embodiment of the present application;

fig. 14 shows a green spectrum of a display panel according to an embodiment of the present application;

fig. 15 shows a blue light spectrum of a display panel according to an embodiment of the present application;

fig. 16 is a reflectivity curve of a display panel according to an embodiment of the present disclosure;

fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed Description

In order to better understand the technical solutions provided by the embodiments of the present specification, the technical solutions of the embodiments of the present specification are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and are not limitations on the technical solutions of the embodiments of the present specification, and the technical features in the embodiments and examples of the present specification may be combined with each other without conflict.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the phrase "comprising a. -. Said" to define an element does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The term "two or more" includes the case of two or more.

At present, with the rapid development of display technologies, more and more functions are integrated on a display panel, and in addition, the overall screen appearance with a high screen ratio is more and more common. In order to meet the requirements of display driving, appearance optimization or other functions, more and more electrodes and wires are integrated on the display panel, and materials adopted by part of the electrodes and the wires have a light reflecting effect. The structure with the light reflection effect can cause a large amount of reflection of light rays of the external environment of the display panel, interference of the reflected light rays of the display panel to the display light rays can be caused, and the contrast and the visibility of the display panel can be reduced. However, the reflection reduction of the display panel generally causes the light emitting efficiency of the display panel to be low, that is, the light emitting efficiency of the display panel for emitting light of a display screen is reduced while the ambient light reflection efficiency of the display panel is reduced, and thus the power consumption and the service life of the display panel are affected.

In view of this, embodiments of the present disclosure provide a display panel and a display device, which can improve the light emitting efficiency of the display panel, and further reduce the power consumption of the display panel and improve the service life of the display panel.

In a first aspect of an embodiment of the present application, a display panel is provided, and fig. 1 is a schematic structural diagram of the display panel provided in the embodiment of the present application. As shown in fig. 1, a display panel provided in an embodiment of the present application includes: a substrate layer 100, a plurality of pixel cells 200, and at least one optical adjustment layer 300. The substrate layer 100 may be a hard substrate, a hard substrate may be a glass substrate, and the substrate layer 100 may also be flexible, and a polyimide film layer may be used, which is not specifically limited in this embodiment. The plurality of pixel units 200 may be arranged in an array, and the pixel units 200 are disposed on one side of the substrate layer 100; the pixel unit 200 may include a light emitting device that actively emits light, and the pixel unit 200 may further include a display device that passively emits light and transmits light under a driving signal, such as a liquid crystal driving device, which is not particularly limited in the embodiments of the present application.

Fig. 2 is a schematic optical path diagram of a display panel according to an embodiment of the present disclosure; fig. 3 is a schematic view of another optical path of the display panel according to the embodiment of the present disclosure. With reference to fig. 1-3, the optical adjustment layer 300 is disposed on a side of the pixel unit 200 away from the substrate layer 100; the optical adjustment layer 300 is used for transmitting the first circularly polarized light L1 and blocking the second circularly polarized light L2, wherein the first circularly polarized light L1 and the second circularly polarized light L2 have different rotation directions, so that the second circularly polarized light L2 is converted into the first circularly polarized light L1 through reflection and then is transmitted through the optical adjustment layer 300. The wavelengths of the first circularly polarized light L1 and the second circularly polarized light L2 are the same. It should be noted that the number of the optical adjustment layer 300 may be one or more, and fig. 1 is only schematic and is not intended to limit the present application in particular.

Illustratively, as shown in fig. 2, the light emitted or transmitted by the pixel unit 200 of the display panel is natural light L0, the natural light L0 has light in each vibration direction, after the natural light L0 passes through the optical adjustment layer 300, the first circularly polarized light L1 is transmitted out of the optical adjustment layer 300, the transmitted first circularly polarized light L1 can be used for displaying a picture, and the second circularly polarized light L2 is reflected by the optical adjustment layer 300 back to the inside of the display panel. Illustratively, the first circularly polarized light L1 is left-handed circularly polarized light, the second circularly polarized light L2 is right-handed circularly polarized light, and the first circularly polarized light L1 and the second circularly polarized light L2 have opposite handedness. The second circularly polarized light L2 can be subjected to rotation direction conversion after being reflected inside the display panel to obtain the first circularly polarized light L1, and the first circularly polarized light L1 obtained by reflection can continue to be transmitted out of the optical adjustment layer 300, so that light emitted or transmitted out of the pixel unit 200 is not lost and is transmitted out of the optical adjustment layer 300, and the light output of the display panel can be greatly improved, and the light output efficiency of a display picture of the display panel is improved.

Illustratively, as shown in fig. 3, ambient light outside the display panel is natural light and is denoted by L00, L00 enters the optical adjustment layer 300 from the display side of the display panel, and the first circularly polarized light L1 is transmitted and enters the display panel. The first circular polarization L1 that sees through takes place to revolve to the transform through the reflection of display panel internal reflection structure, obtain second circular polarization L2, second circular polarization L2 incides optical regulation layer 300 once more and can't see-through, can be blockked at the inside unable outgoing of display panel, can reduce display panel to the reflection light quantity of ambient light, can play the effect that reduces ambient light reflectivity, even second circular polarization L2 obtains first circular polarization L1 from optical regulation layer 300 outgoing once more through repeated reflection, light has lost the great majority energy at the in-process of repeated reflection, ambient light's reflectivity still can keep at lower level, can not influence display panel's normal demonstration.

It should be noted that the dotted arrows shown in fig. 2 and 3 indicate the traveling direction of the light. The optical adjustment layer 300 may also transmit the right-handed circularly polarized light and block the left-handed circularly polarized light, and may be configured according to the material property of the optical adjustment layer 300, which is not specifically limited in the embodiments of the present application.

It should be noted that, in order to reduce the reflectivity of the reflection structure in the display panel to the external ambient light, a polarizer is usually disposed to reduce the reflectivity of the ambient light in the display panel, but the arrangement of the polarizer may cause the low light-emitting efficiency of the display panel, relatively high power consumption, and short service life. Especially, the light efficiency conversion efficiency of the blue light emitting material is low, and the service life of the blue light pixel is greatly influenced.

In view of the above problem, the display panel provided in the embodiment of the application, by providing the optical adjustment layer 300, the optical adjustment layer 300 is configured to transmit the first circularly polarized light L1 and block the second circularly polarized light L2, and the first circularly polarized light L1 and the second circularly polarized light L2 have different rotation directions, so that the second circularly polarized light L2 is converted into the first circularly polarized light L1 through reflection and then transmitted through the optical adjustment layer 300. The light emitted or transmitted by the pixel unit 200 is emitted from the optical adjustment layer 300 without loss, so that the light output of the display panel can be greatly improved, and the light output efficiency of the display frame of the display panel can be improved. The improvement of display panel's luminous efficiency can reduce display panel's drive power consumption, and in the display effect of the same light-emitting volume promptly, the drive power consumption of the display panel that this application embodiment provided is lower, can further improve display panel's life. In addition, the external ambient light of display panel incides optical adjustment layer 300 from the demonstration side of display panel, and inside first circular polarization L1 penetrated to incide display panel, second circular polarization L2 was reflected, stops outside display panel, can reduce the external ambient light and incide display panel in. The first circular polarization L1 that sees through takes place the conversion of turning round through the reflection of display panel internal reflection structure, obtains second circular polarization L2, and second circular polarization L2 incides optical adjustment layer 300 once more and can't see through, can be blockked and can't go out in display panel is inside, can reduce display panel to the reflection light yield of ambient light, can play the effect that reduces ambient light reflectivity, and ambient light's reflectivity can keep at lower level, can not influence display panel's normal demonstration.

In some embodiments, the optically modifying layer comprises a cholesteric liquid crystal layer.

It should be noted that cholesteric liquid crystal is a term of fine chemical engineering technology, and means that it has a layered structure like smectic liquid crystal, and the molecules in the layer are arranged like nematic liquid crystal, and the long axes of the molecules are parallel to each other in the layer. The liquid crystal is characterized in that the molecular axis direction of each layer and the molecular axis direction of the adjacent layer are slightly deviated, and the whole liquid crystal forms a spiral structure. The length of the pitch is in the order of the wavelength of visible light. The optical properties of cholesteric liquid crystal, such as optical rotation, selective light scattering, and circular dichroism, are caused by this special helical structure. Circularly polarized dichroism may enable transmission of a first circularly polarized light and blocking of a second circularly polarized light.

In some embodiments, the display panel provided in the embodiments of the present application further includes: the packaging layer is arranged between the pixel unit and the optical adjusting layer, and can be used for protecting the light-emitting device under the condition that the pixel unit comprises the light-emitting device, so that the light-emitting device is prevented from being corroded by external water and oxygen. The touch layer can realize the touch function of the display panel and can be arranged between the packaging layer and the optical adjusting layer; the touch layer can also be arranged on one side of the optical adjusting layer far away from the substrate layer. The touch layer may include touch electrodes, and the touch electrodes may be arranged in layers, which is not specifically limited in the embodiments of the present application.

For example, fig. 4 is a schematic structural diagram of another display panel provided in an embodiment of the present application. As shown in fig. 4, the touch layer 500 is disposed between the encapsulation layer 400 and the optical adjustment layer 300.

In some embodiments, the optically modulating layer 300 includes a plurality of modulating regions; the pixel unit 200 comprises a plurality of sub-pixels, different sub-pixels are used for emitting or transmitting light rays with different colors, and the orthographic projection of the adjusting area on the substrate layer 100 covers the orthographic projection of the sub-pixels on the substrate layer 100; the central wavelength ranges of the adjusting regions corresponding to different sub-pixels are different, and the central wavelength range corresponding to the adjusting region is the wavelength range corresponding to the first circular polarized light. The light that corresponds the regulation region of different center wavelength ranges and decompose corresponding subpixel, can see through the first circular polarization of 50% center wavelength range, the second circular polarization of 50% center wavelength range jets out from the regulation region after the reflection turns into first circular polarization, can improve the transmissivity that corresponds subpixel and send light, can improve display panel's demonstration contrast and visibility, can also satisfy under the condition of the luminousness of normal display demand in addition, realize the reduction of consumption, improve display panel's life-span.

For example, fig. 5 is a schematic structural diagram of another display panel provided in an embodiment of the present application. As shown in fig. 5, the pixel unit 200 includes a first sub-pixel 210, a second sub-pixel 220, and a third sub-pixel 230. A pixel defining structure 201 is disposed between adjacent sub-pixels. The optical adjustment layer 300 includes a first adjustment region 310, a second adjustment region 320, and a third adjustment region 330, the first adjustment region 310 corresponding to the first sub-pixel 210, the second adjustment region 320 corresponding to the second sub-pixel 220, and the third adjustment region 330 corresponding to the third sub-pixel 230. For example, if the first sub-pixel 210 emits or transmits red light, the central wavelength range of the first adjustment region 310 may be a red light band, a first circularly polarized light of the red light band may be transmitted through the first adjustment region 310, and a second circularly polarized light of the red light band may be blocked by the first adjustment region 310; if the second sub-pixel 220 emits or transmits green light, the central wavelength range of the second adjustment region 320 may be a green light band, the first circularly polarized light of the green light band may transmit through the second adjustment region 320, and the second circularly polarized light of the green light band may be blocked by the second adjustment region 320; if the third sub-pixel 230 emits or transmits blue light, the central wavelength range of the third adjusting region 330 may be a blue light band, the first circularly polarized light of the blue light band may transmit through the third adjusting region 330, and the second circularly polarized light of the blue light band may be blocked by the third adjusting region 330.

In some embodiments, the optical adjustment layers of the adjustment regions corresponding to all the different sub-pixels are arranged in the same layer. For example, as shown in fig. 5, the sub-pixels and the adjustment regions may be in one-to-one correspondence, and the optical adjustment layers of the adjustment regions corresponding to all the sub-pixels are integrated in the same film layer, so that the film layer of the display panel may be thinned, and the thickness of the display panel may be reduced. The central wavelength ranges corresponding to different adjustment regions are different, so that the optical adjustment material properties of different adjustment regions are different, for example, the pitch of the helical structure of cholesteric liquid crystal is set differently.

In some embodiments, the pitch of the spirally arranged liquid crystal molecules of the cholesteric liquid crystal layer is determined according to the central wavelength range corresponding to the modulation region. The different adjustment regions can be prepared separately, and the production flow can be set according to the material properties and the process design, and the embodiment of the present application is not particularly limited.

It should be noted that the number of sub-pixels included in the pixel unit 200 shown in fig. 5 is only illustrative and is not meant to be a specific limitation of the embodiment of the present application.

The embodiment of the application provides a display panel, through corresponding the setting adjustment region to different sub-pixels, adjustment region pertinence decomposes the light wave band to sub-pixel, be about to partial first circular polarisation and see through, the part is revolved to opposite second circular polarisation and is blockked, the second circular polarisation that is blockked is emergent after reflection conversion first circular polarisation, can further improve the transmissivity of the display light of full wave band, and then reduce display panel's drive consumption, improve life.

In some embodiments, the optical adjustment layers to which the adjustment regions corresponding to at least two different sub-pixels belong are arranged in the same layer. For example, a layer of the optical adjustment layer may be provided with adjustment regions corresponding to two or more different sub-pixels, and the number of the layers of the optical adjustment layer may be at least two, and the adjustment regions are specifically allocated according to the number of the sub-pixels and the resolution setting, which is not specifically limited in the embodiments of the present application.

In some embodiments, the number of layers of the optical adjustment layer 300 is the same as the number of types of sub-pixels in each pixel unit 200, each layer of the optical adjustment layer 300 corresponds to one type of target sub-pixel, each layer of the optical adjustment layer 300 includes a plurality of adjustment regions for transmitting the first circular polarization and blocking the second circular polarization corresponding to the target sub-pixel, and a normally transmissive region for transmitting light of sub-pixels other than the target sub-pixel, which is one type of sub-pixel in the pixel unit.

For example, fig. 6 is a schematic structural diagram of another display panel provided in an embodiment of the present application. As shown in fig. 6, the first, second, and third adjustment regions 310, 320, and 330 are provided to the optical adjustment layer 300 of different layers. The first adjustment area 310 is disposed corresponding to the first sub-pixel 210, and the first sub-pixel 210 is a target sub-pixel corresponding to the first adjustment area 310; the second adjustment region 320 is disposed corresponding to the second sub-pixel 220, and the second sub-pixel 220 is a target sub-pixel corresponding to the second adjustment region 320; the third adjustment region 330 is disposed corresponding to the third sub-pixel 230, and the third sub-pixel 230 is a target sub-pixel corresponding to the third adjustment region 330. The area of the optical adjustment layer 300 to which the first adjustment area 310 belongs other than the first adjustment area 310 is provided with a normally transmissive area 301, that is, the normally transmissive area 301 of the optical adjustment layer 300 to which the first adjustment area 310 belongs corresponds to the second sub-pixel 220 and the third sub-pixel 230. The area of the optical adjustment layer 300 to which the second adjustment area 320 belongs other than the second adjustment area 320 is provided with the normally transmissive area 301, that is, the normally transmissive area 301 of the optical adjustment layer 300 to which the second adjustment area 320 belongs corresponds to the first sub-pixel 210 and the third sub-pixel 230. The region of the optical adjustment layer 300 to which the third adjustment region 330 belongs, other than the third adjustment region 330, is provided with the normally transmissive region 301, that is, the normally transmissive region 301 of the optical adjustment layer 300 to which the third adjustment region 330 belongs corresponds to the first sub-pixel 210 and the second sub-pixel 220. The normally transmissive region 301 can transmit light of the full wavelength band without affecting the emission of light emitted by other sub-pixels except the corresponding target sub-pixel.

For example, referring to fig. 6, the normally transmissive region 301 may be filled with a transparent optical glue, which may have a better light transmission performance.

In some embodiments, the normally transmissive region includes a color filter. The color filter film can improve display color cast and has the function of color correction.

For example, fig. 7 is a schematic structural diagram of a display panel provided in an embodiment of the present application. As shown in fig. 7, a second color filter 620 and a third color filter 630 may be disposed in the normal transmission region of the optical adjustment layer 300 to which the first adjustment region 310 belongs, a first color filter 610 may be disposed in the normal transmission region of the optical adjustment layer 300 to which the second adjustment region 320 belongs, the first color filter 610 is disposed corresponding to the position of the first sub-pixel 210, the second color filter 620 is disposed corresponding to the position of the second sub-pixel 220, and the third color filter 630 is disposed corresponding to the position of the third sub-pixel 230. The first color filter 610 can filter light of a wavelength band of the first sub-pixel 210, the second color filter 620 can filter light of a wavelength band of the second sub-pixel 220, and the third color filter 630 can filter light of a wavelength band of the third sub-pixel 230.

It should be noted that the color filter may be disposed in the normal transmission region 301 of the two or more optical adjustment layers 300, and the color filter may be disposed in two or more layers, which is not specifically limited in the embodiments of the present application.

The display panel provided by the embodiment of the application integrates the color filter film in the normal transmission area 301 of the optical adjusting layer 300 according to the arrangement of the sub-pixels and the setting of the adjusting area, so that the film thickness of light transmission can be reduced, and the film structure is simplified.

In some embodiments, the number of layers of the optical adjustment layer 300 is the same as the number of types of sub-pixels in each pixel unit, different layers of the optical adjustment layer 300 correspond to different sub-pixels, and the central wavelength ranges corresponding to different layers of the optical adjustment layer 300 are different. For example, fig. 8 is a schematic structural diagram of another display panel provided in an embodiment of the present application. As shown in fig. 8, the pixel unit 200 includes a first sub-pixel 210, a second sub-pixel 220, and a third sub-pixel 230, the first sub-pixel 210, the second sub-pixel 220, and the third sub-pixel 230 may respectively correspond to different light wavelength bands, the first sub-pixel 210 may include a first light emitting device, the second sub-pixel 220 may include a second light emitting device, and the third sub-pixel 230 may include a third light emitting device, where the first light emitting device, the second light emitting device, and the third light emitting device emit light with different colors. The optical adjustment layer 300 may have three layers, which are a first optical adjustment layer 302, a second optical adjustment layer 303, and a third optical adjustment layer 304, respectively, a central wavelength range of the first optical adjustment layer 302 is a wavelength band in which the first light emitting device emits light, a central wavelength range of the second optical adjustment layer 303 is a wavelength band in which the second light emitting device emits light, and a central wavelength range of the third optical adjustment layer 304 is a wavelength band in which the third light emitting device emits light. The first optical adjustment layer 302, the second optical adjustment layer 303, and the third optical adjustment layer 304 are all provided as a single layer, and can improve the transmittance of the light in the entire wavelength band of visible light.

For example, referring to fig. 8, the display panel provided in the embodiment of the present application may further include a color filter layer, and the color filter layer may include a first color filter film 610, a second color filter film 620, a third color filter film 630, and a light blocking matrix 640.

In some embodiments, the display panel provided in the embodiments of the present application further includes: the circular polarizer is arranged on one side, far away from the substrate layer 100, of the optical adjusting layer 300; the circular polarizer may include a linear polarizer and a phase retardation film disposed between the optical adjustment layer 300 and the linear polarizer. The phase retardation film can be used for converting circular polarization light and linear polarization light, and the linear polarizer can play a role in filtering light and can play a role in reducing the reflection of external environment light.

For example, fig. 9 is a schematic view of another optical path of the display panel provided in the embodiment of the present application. As shown in fig. 9, the first circularly polarized light L1 transmitted from the optical adjustment layer 300 is converted into linearly polarized light L3 by the phase retardation film 710, and the linearly polarized light L3 can be transmitted from the linearly polarizing plate 720. The arrangement of the circular polaroid does not influence the normal emergent of the display light of the display panel, and the higher transmittance of the display picture light of the display panel can be ensured. The optically modifying layer 300 has served to block reflections of ambient light.

It should be noted that, for example, in the case that the optical adjustment layer adopts the cholesteric liquid crystal layer, and the helical structure of the liquid crystal molecules of the cholesteric liquid crystal layer satisfies the right-handed helical rule, that is, the liquid crystal molecules are arranged in a right-handed helical structure, what can be passed through is a first circularly polarized light of left-handed rotation, what is blocked is a second circularly polarized light of right-handed rotation, at this time, the corresponding circularly polarized light should be left-handed rotation, that is, the optical axis needs to satisfy the left-handed rotation condition, the first circularly polarized light of left-handed rotation can be converted into linearly polarized light, and the linearly polarized light can be passed through the linearly polarized light plate, and the optical axis of the circularly polarized light and the absorption axis of the linearly polarized light plate need to satisfy the relationship of 45 ° included angle of left-handed rotation. It can be understood that the liquid crystal spiral direction of the cholesteric liquid crystal layer has a corresponding relationship with the optical axis of the circular polarizer and the absorption axis of the linear polarizer, so that the light of the display panel can be normally emitted for picture display. Exemplarily, the helical structure of the liquid crystal molecules on the cholesteric liquid crystal layer satisfies the left-handed helical rule, that is, the liquid crystal molecules are arranged in a left-handed helical structure, and a right-handed first circularly polarized light can be transmitted, and a left-handed second circularly polarized light is blocked, and the corresponding circularly polarized light should be right-handed at this time, that is, the optical axis needs to satisfy the right-handed condition, and the right-handed first circularly polarized light can be converted into linearly polarized light, and the linearly polarized light can be transmitted through the linearly polarized light sheet, and the optical axis of the circularly polarized light and the absorption axis of the linearly polarized light need to satisfy the relationship of the included angle of 45 degrees in the right-handed direction.

For example, referring to fig. 9, after the ambient light enters the linear polarizer 720, half of the ambient light is blocked, and linearly polarized light L3 perpendicular to the absorption axis of the linear polarizer 720 is transmitted, which may play a role of decreasing the reflection.

In some embodiments, the phase retardation film may include a first phase retardation film and a second phase retardation film. The first phase retardation film may be a half-wave plate and the second phase retardation film may be a quarter-wave plate. For example, the first phase retardation film may include a cholesteric liquid crystal layer, and the second phase retardation film may include a cholesteric liquid crystal layer. The included angle between the slow axis of the first phase retardation film and the absorption axis of the linear polaroid is a first angle, the included angle between the slow axis of the second phase retardation film and the absorption axis of the linear polaroid is a second angle, and the second angle and the first angle are in a linear relation. The phase retardation film can be made to achieve mutual conversion of circularly polarized light and linearly polarized light, and the converted linearly polarized light can be transmitted from the linearly polarizing plate.

Exemplarily, fig. 10 is a schematic structural diagram of a circular polarizer provided in an embodiment of the present application. As shown in fig. 10, the circular polarizer includes a pressure-sensitive adhesive layer PSA, a second phase retardation film LC2, a third adhesive layer 703, a first phase retardation film LC1, a second adhesive layer 702, a functional adhesive layer PVA, a first adhesive layer 701, and a substrate 704, where the substrate 704 is disposed on a side close to the display side and serves as an exit surface of light.

Referring to fig. 10, the first adhesive layer 701, the second adhesive layer 702, and the third adhesive layer 703 may include UV glue, pressure sensitive glue, heat-curable water glue, or the like. The functional adhesive film layer PVA can be an iodine-series stretching type linear polarization functional film and has the function of converting natural light into linearly polarized light, and the functional adhesive film layer PVA has an absorption axis. The LC1 is a half wave plate, the half wave plate contains a fast axis and a slow axis in a plane parallel to the panel, and the light wave generates a phase difference of one-half wavelength through the LC1 film. The LC2 is a quarter-wave plate containing a fast axis and a slow axis in a plane parallel to the panel, the light waves passing through the LC2 film to produce a quarter-wavelength phase difference. The absorption axis direction of PVA and the slow axis direction of the LC1 film layer form a specific acute angle alpha which is approximately equal to 15 degrees, namely, the first angle is alpha, and the included angle between the absorption axis direction of PVA and the slow axis direction of the LC2 film layer is 2 alpha +45 degrees, namely, the second angle is 2 alpha +45 degrees.

Exemplarily, referring to fig. 8, the third optical adjustment layer 304 may work only for green light, the second optical adjustment layer 303 may work only for red light, and the first optical adjustment layer 302 may work only for blue light. The third optical adjustment layer 304 can decompose the green light emitted from the panel into about 50% of right-handed light for transmission, 50% of left-handed light is reflected back to the panel, and the right-handed light is changed into right-handed light through reflection of the panel, passes through the third optical adjustment layer 304, and then normally exits the module, and the red light and the blue light emitted from the panel cannot be decomposed. The second optical adjustment layer 303 can decompose the red light emitted from the panel into about 50% of right-handed light, which is transmitted through the right-handed light and then emitted out of the module, and 50% of left-handed light is reflected back to the panel, which is reflected by the panel to become right-handed light, and then emitted out of the module, without decomposition of the green light and the blue light emitted from the panel. The first optical adjustment layer 302 can decompose the blue light emitted from the panel into about 50% of right-handed light, and the 50% of left-handed light is reflected back to the panel, and becomes the right-handed light after being reflected by the panel and then is emitted out of the module normally, without decomposing the red light and the green light emitted from the panel. The brightness of green light, red light and blue light can be respectively improved. Under the same current drive, the green light brightness can be enhanced by more than 35%, the red light brightness can be enhanced by more than 32%, the blue light brightness can be enhanced by more than 25%, and the white light brightness can be enhanced by more than 30%. The power consumption can be reduced by more than 22%. Meanwhile, the structure has excellent reflectivity and reflection hue. The reflectivity can be controlled below 6%, and the reflectivity can also be reduced for ambient light.

In some embodiments, the pixel unit 200 may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the red sub-pixel may emit or transmit red light, the green sub-pixel may emit or transmit filtered light, and the blue sub-pixel may emit or transmit blue light. The central wavelength range of the optical adjustment layer corresponding to the red sub-pixel may be 600nm to 650nm, for example, 615nm, and the half-peak width of the spectrum of the optical adjustment layer corresponding to the red sub-pixel may be 5nm to 100nm, for example, 70nm. The spectrum of the optical adjusting layer can be a relational graph of the wavelength and the light intensity of light decomposition, namely the relational graph of the wavelength and the transmitted light intensity of the first circular polarized light which can pass through corresponding to the optical adjusting layer, the wavelength range corresponding to the strong light intensity of the graph is the central wavelength range corresponding to the optical adjusting layer, and the width of half of the peak of the central wavelength range is the half-peak width.

In some embodiments, the green sub-pixel corresponds to a central wavelength in the range of 520nm to 550nm, such as 530nm, and the optical adjustment layer corresponds to a green sub-pixel having a half-peak width of the spectrum of 5nm to 100nm, such as 60nm.

In some embodiments, the central wavelength range corresponding to the blue sub-pixel is 450nm to 480nm, for example, 460nm, and the half-peak width of the spectrum of the optical adjustment layer corresponding to the blue sub-pixel is 5nm to 100nm, for example, 55nm.

Exemplarily, fig. 11 is a reflection spectrum of an optical adjustment layer of a display panel provided in an embodiment of the present application. As shown in fig. 11, the abscissa of the reflection spectrum is wavelength in nm, and the ordinate is reflectance, and since the main reference spectrum runs, specific data is not identified. The main action waveband of the blue light optical adjusting layer BLC is a blue light waveband, namely, the central wavelength is the blue light waveband; the main action waveband of the green light optical adjusting layer GLC is a green light waveband, namely the central wavelength is a green light waveband; the main wavelength band of the red light optical modulation layer RLC is the red light wavelength band.

Exemplarily, fig. 12 shows a white light spectrum of a display panel provided in an embodiment of the present application. As shown in fig. 12, the abscissa is wavelength, unit nm, and the ordinate is light intensity, and since it is only necessary to compare the contour size, the ordinate value is not identified. Under the same current driving, the white light spectrum profile of the display panel provided with the optical adjustment layer is P1, and the white light spectrum profile of the display panel not provided with the optical adjustment layer is P2, as can be seen from fig. 12, the white light spectrum profile P1 of the display panel provided with the optical adjustment layer is obviously greater than the white light spectrum profile P2 of the display panel not provided with the optical adjustment layer, and then the white light spectrum of the display panel provided with the optical adjustment layer is superior to the white light spectrum of the display panel not provided with the optical adjustment layer, so that the driving power consumption of the display panel can be reduced by providing the optical adjustment layer.

For example, fig. 13 shows a red light spectrum of a display panel provided in an embodiment of the present application; fig. 14 shows a green spectrum of a display panel according to an embodiment of the present application; fig. 15 shows a blue light spectrum of a display panel according to an embodiment of the present disclosure. The abscissa of fig. 13-15 is wavelength in nm and the ordinate is light intensity, but for comparison, no numerical values are identified. The dotted lines in fig. 13 to 15 are spectral profiles of the display panel without the optical adjustment layer driven by the same current, and the solid lines are spectral profiles of the display panel with the optical adjustment layer driven by the same current, and it can be seen that the solid line profiles are larger than the dotted line profiles, and the monochrome spectra of the sub-pixels of the display panel with the optical adjustment layer are better than the monochrome spectra of the sub-pixels of the display panel without the optical adjustment layer, and therefore, the driving power consumption of the display panel can be reduced by the optical adjustment layer. The red light brightness can be improved by 32.6%, the green light brightness can be improved by 35.2%, the blue light brightness can be improved by 25.8%, and the white light brightness can be improved by 33.8%.

For example, fig. 16 is a reflectivity curve of a display panel according to an embodiment of the present application. As shown in fig. 16, the reflectance of the display panel with the optical adjustment layer can be controlled to be about 4.8% on average in the visible light band reflectance of the ambient light, and the reflectance hue coordinates of the reflection can be as follows: a =1.46, b = 0.9. When improving display panel's luminous efficiency, can also guarantee that display panel controls at lower level to the reflectivity of ambient light, can guarantee display panel's display effect when reducing the consumption.

In a second aspect of the embodiments of the present application, a display device is provided, and fig. 17 is a schematic structural diagram of the display device provided in the embodiments of the present application. As shown in fig. 17, a display device provided in an embodiment of the present application includes: the display panel 1000 according to the first aspect.

It should be noted that the display device provided in the embodiment of the present application may be a smart phone, a tablet computer, a notebook computer, a television, a supporting and wearing device, or another display, and the embodiment of the present application is not particularly limited.

The display device that this application embodiment provided sets up the optics regulation layer through display panel, and the optics regulation layer is used for passing through first circular polarisation to block second circular polarisation, the rotation direction of first circular polarisation and second circular polarisation is different, so that second circular polarisation passes through behind reflection conversion first circular polarisation from the optics regulation layer and sees through. The light emitted or transmitted by the pixel unit is emitted from the optical adjusting layer without loss, so that the light emitting amount of the display panel can be greatly improved, and the light emitting efficiency of a display picture of the display panel is further improved. The improvement of display panel's luminous efficiency can reduce display panel's drive power consumption, and in the display effect of the same light-emitting volume promptly, the drive power consumption of the display panel that this application embodiment provided is lower, can further improve display panel's life. In addition, the external ambient light of display panel penetrates into the optical adjustment layer from the display side of display panel, and inside first circular polarized light penetrated and penetrated into the display panel, the second circular polarized light was reflected, blocked outside the display panel, can reduce the external ambient light and penetrated into in the display panel. The first circular polarized light that sees through takes place the conversion of turning round through the reflection of display panel internal reflection structure, obtains second circular polarized light, and second circular polarized light incides the optics regulating layer once more and can't see-through, can be blockked at the inside unable outgoing of display panel, can reduce display panel to the reflection light yield of ambient light, can play the effect that reduces ambient light reflectivity, and ambient light's reflectivity can keep at lower level, can not influence display panel's normal demonstration.

It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.

While preferred embodiments of the present specification have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the specification.

It will be apparent to those skilled in the art that various changes and modifications can be made in the present specification without departing from the spirit and scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalents, the specification is intended to include such modifications and variations.

Claims (15)

1. A display panel, comprising:

a substrate layer;

the pixel units are arranged on one side of the substrate layer;

at least one optical adjusting layer arranged on one side of the pixel unit far away from the substrate layer;

the optical adjustment layer is used for transmitting first circular polarized light and blocking second circular polarized light, wherein the rotating directions of the first circular polarized light and the second circular polarized light are different, so that the second circular polarized light is converted into the first circular polarized light through reflection and then is transmitted through the optical adjustment layer.

2. The display panel according to claim 1,

the optical conditioning layer comprises a cholesteric liquid crystal layer.

3. The display panel according to claim 1 or 2,

the optical conditioning layer comprises a plurality of conditioning regions;

the pixel unit comprises a plurality of sub-pixels, different sub-pixels are used for emitting or transmitting light rays with different colors, and the orthographic projection of the adjusting area on the substrate layer covers the orthographic projection of the sub-pixels on the substrate layer;

the central wavelength ranges of the adjusting regions corresponding to different sub-pixels are different, and the central wavelength range corresponding to the adjusting region is the wavelength range corresponding to the first circular polarized light.

4. The display panel according to claim 3,

in the case where the optical adjustment layer includes the cholesteric liquid crystal layer, the pitch of the spirally arranged liquid crystal molecules of the cholesteric liquid crystal layer is determined in accordance with the central wavelength range corresponding to the adjustment region.

5. The display panel according to claim 3,

and the adjusting regions corresponding to all the different sub-pixels belong to the optical adjusting layer and are arranged in the same layer.

6. The display panel according to claim 3,

the optical adjusting layers of the adjusting regions corresponding to at least two different sub-pixels are arranged in the same layer.

7. The display panel according to claim 3,

the number of layers of the optical adjusting layer is the same as the number of types of the sub-pixels in each pixel unit, each layer of the optical adjusting layer corresponds to one target sub-pixel, each layer of the optical adjusting layer comprises a plurality of adjusting areas and normal transmission areas, the adjusting areas are used for transmitting the first circular polarized light corresponding to the target sub-pixel and blocking the second circular polarized light, and the normal transmission areas are used for transmitting light rays of other sub-pixels except the target sub-pixel.

8. The display panel according to claim 7,

the normal transmission area comprises a color filter film.

9. The display panel according to claim 1 or 2,

the pixel unit comprises a plurality of sub-pixels, different sub-pixels are used for emitting or transmitting light rays with different colors, the number of layers of the optical adjusting layer is the same as the number of the types of the sub-pixels in each pixel unit, different layers of the optical adjusting layer correspond to different sub-pixels, and the central wavelength ranges corresponding to different layers of the optical adjusting layer are different.

10. The display panel according to claim 3,

the pixel unit comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel;

the central wavelength range corresponding to the red sub-pixel is 600nm to 650nm, and the half-peak width of the spectrum of the optical adjustment layer corresponding to the red sub-pixel is 5nm to 100nm; and/or the presence of a gas in the gas,

the central wavelength range corresponding to the green sub-pixel is 520nm to 550nm, and the half-peak width of the spectrum of the optical adjusting layer corresponding to the green sub-pixel is 5nm to 100nm; and/or the presence of a gas in the gas,

the central wavelength range corresponding to the blue sub-pixel is 450nm to 480nm, and the half-peak width of the spectrum of the optical adjustment layer corresponding to the blue sub-pixel is 5nm to 100nm.

11. The display panel according to claim 1, further comprising:

the circular polarizer is arranged on one side, far away from the substrate layer, of the optical adjusting layer;

the circular polarizer includes a linear polarizer and a phase retardation film disposed between the optical adjustment layer and the linear polarizer.

12. The display panel according to claim 11,

the phase retardation film comprises a first phase retardation film and a second phase retardation film;

the included angle between the slow axis of the first phase retardation film and the absorption axis of the linear polaroid is a first angle, the included angle between the slow axis of the second phase retardation film and the absorption axis of the linear polaroid is a second angle, and the second angle and the first angle are in a linear relation.

13. The display panel according to claim 12,

the first phase retardation film is a half wave plate, and the second phase retardation film is a quarter wave plate; and/or the presence of a gas in the atmosphere,

the first phase retardation film and/or the second phase retardation film includes a cholesteric liquid crystal layer.

14. The display panel according to claim 1, further comprising:

the packaging layer is arranged between the pixel unit and the optical adjusting layer;

the touch layer is arranged between the packaging layer and the optical adjusting layer, or the touch layer is arranged on one side, far away from the substrate layer, of the optical adjusting layer.

15. A display device, comprising:

the display panel of any one of claims 1-14.

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