WO2022156327A1 - 显示面板和显示装置 - Google Patents

显示面板和显示装置 Download PDF

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Publication number
WO2022156327A1
WO2022156327A1 PCT/CN2021/130641 CN2021130641W WO2022156327A1 WO 2022156327 A1 WO2022156327 A1 WO 2022156327A1 CN 2021130641 W CN2021130641 W CN 2021130641W WO 2022156327 A1 WO2022156327 A1 WO 2022156327A1
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WIPO (PCT)
Prior art keywords
polarizer
layer
display panel
display
retardation
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PCT/CN2021/130641
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English (en)
French (fr)
Inventor
燕青青
袁晓敏
赵二瑾
王格
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/915,168 priority Critical patent/US20230122614A1/en
Publication of WO2022156327A1 publication Critical patent/WO2022156327A1/zh

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • 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 
    • G02F1/03—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 ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
    • G02F1/0305—Constructional arrangements
    • G02F1/0311—Structural association of optical elements, e.g. lenses, polarizers, phase plates, with the crystal
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • 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

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a display panel and a display device including the display panel.
  • FMLOC Flexible Multi-Layer On Cell, flexible multi-layer structure
  • the existing display panel will produce a phenomenon of uneven hue, and the ambient light has a great influence on the display effect, especially under strong ambient light, it is difficult to see the display screen clearly.
  • the purpose of the present disclosure is to overcome the above-mentioned shortcomings of the prior art, and to provide a display panel with uniform color ratio and a display device including the display panel.
  • a display panel comprising:
  • a retardation layer disposed on the display side of the display substrate
  • a polarizer is arranged on the side of the retardation layer away from the display substrate, the direction of the absorption axis of the polarizer is parallel or perpendicular to the stretching direction of the polarizer, and the absorption axis of the polarizer is The included angles with the optical axis of the retardation layer are not equal to 0° and 90°.
  • the retardation layer includes a 1/4 ⁇ retardation film.
  • the included angle between the optical axis of the 1/4 ⁇ retardation film and the absorption axis of the polarizer is 45°.
  • the retardation layer further includes a 1/2 ⁇ retardation film, and the 1/2 ⁇ retardation film is disposed between the 1/4 ⁇ retardation film and the polarizer. between.
  • the included angle between the optical axis of the 1/4 ⁇ retardation film and the absorption axis of the polarizer is ⁇ 1
  • the optical axis of the 1/2 ⁇ retardation film and the The included angle of the absorption axis of the polarizer is ⁇ 2
  • the ⁇ 1 is greater than or equal to 10° and less than or equal to 20°
  • the ⁇ 1 is greater than or equal to 70° and less than 90°
  • the ⁇ 2 is greater than or equal to 70° and less than 90° °
  • the ⁇ 2 is greater than or equal to 10° and less than or equal to 20°.
  • the ⁇ 2 when the ⁇ 1 is 15°, the ⁇ 2 is 75°; or when the ⁇ 1 is 75°, the ⁇ 2 is 15°.
  • the display panel further includes:
  • a third adhesive layer disposed on the side of the polarizer away from the display substrate;
  • the transparent cover plate is arranged on the side of the third adhesive layer away from the display substrate.
  • the thickness of the third adhesive layer is greater than or equal to 0.15 mm.
  • the transparent cover plate includes:
  • the bent portion is connected to the opposite side edges of the flat portion and smoothly transitions with the flat portion.
  • the third adhesive layer, the polarizer, and the retardation layer are sequentially stacked on one side of the flat portion and the inner side of the bending portion.
  • the polarizer includes:
  • a polarizing layer disposed on the side of the retardation layer away from the display substrate
  • the second protective layer is disposed on the side of the polarizing layer away from the display substrate.
  • the polarizer further includes:
  • the first protective layer is provided between the retardation layer and the polarizing layer.
  • the display substrate includes a thin film transistor array layer and a light-emitting functional layer; the light-emitting functional layer includes a first electrode, a light-emitting layer, and a second electrode.
  • a display device including the display panel described in any one of the above.
  • a retardation layer is provided on the display side of the display substrate, a polarizer is provided on the side of the retardation layer away from the display substrate, and the direction of the absorption axis of the polarizer is parallel to the stretching direction or Vertical, and the angle between the absorption axis of the polarizer and the optical axis of the retardation layer is not equal to 0° and 90°.
  • the display panel makes the angle between the optical axis of the retardation layer and the stretching direction not equal to 0° and 90°, so that the light everywhere in the retardation layer is not equal to 0° and 90°.
  • Both the axis and the shrinking direction form an included angle not equal to 0° and 90°, and the shrinking force of the polarizer in the remaining positions is reduced in the optical axis direction of the retardation layer.
  • the influence of the optical axis is relatively uniform, and finally the phenomenon of uneven hue is reduced.
  • the polarizer and the retardation layer can avoid the reflection of ambient light to the observer, thereby reducing the influence of ambient light on the display effect and improving the display effect.
  • FIG. 1 is a schematic diagram of the optical axis distribution of the retardation layer in the related art.
  • FIG. 2 is a schematic diagram of the distribution of the pulling force received by the retardation layer in FIG. 1 .
  • FIG. 3 is a schematic diagram of the optical axis distribution of the retardation layer in FIG. 1 after being pulled.
  • FIG. 4 is a schematic diagram of the display effect of the display panel including the retardation layer in FIG. 3 .
  • FIG. 5 is a schematic structural diagram of an exemplary embodiment of a display panel of the present disclosure.
  • FIG. 6 is a schematic diagram of the included angle of the optical axis of the retardation layer in FIG. 5 .
  • Figures 7-9 are schematic diagrams of the shrinkage rate test in two directions after the reliability of the polarizer in different environments.
  • FIG. 10 is a schematic diagram of a display effect of the display panel of the present disclosure.
  • FIG. 11 is a schematic structural diagram of an exemplary embodiment of the transparent cover in FIG. 5 .
  • FIG. 12 is a schematic structural diagram of another exemplary embodiment of the transparent cover in FIG. 5 .
  • Retardation layer 31, 1/4 ⁇ retardation film; 32, 1/2 ⁇ retardation film;
  • Example embodiments will now be described more fully with reference to the accompanying drawings.
  • Example embodiments can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
  • the same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.
  • the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.
  • the polarizing layer (PVA, polyvinyl alcohol) of the polarizer used is thicker.
  • the thicker the polarizing layer the easier it is to shrink under reliable conditions. Pulling leads to uneven hue of the rear display panel, which affects the black effect of the mobile phone.
  • the shrinkage of the polarizing layer is an inherent property of the stretched polarizing layer. Thinning the polarizing layer can reduce the shrinkage phenomenon, but the phenomenon of fading of the rear edge of the reliability (that is, the failure of the polarizing layer) is prone to occur on FMLOC products.
  • the arrows in the figure indicate the optical axis direction of the retardation layer 3 , and the optical axis directions of the retardation layers 3 in the figure are consistent and uniformly arranged.
  • the arrows in the figure indicate the magnitude and direction of the pulling force received by the retardation layer 3, and the pulling force received at the corner of the retardation layer 3 in the figure maximum.
  • the arrows in the figure indicate the optical axis direction of the retardation layer 3
  • the optical axis directions of the retardation layer 3 in the figure are inconsistent and unevenly arranged.
  • 1 to 3 when the shrinking direction is perpendicular or parallel to the optical axis, the shrinking force has little effect on the optical axis.
  • the included angle is still 0° or 90°; when the shrinking direction is not perpendicular and parallel to the optical axis direction, the shrinking force has an influence on the direction of the optical axis, that is, the shrinking direction is the same as that of the retardation layer 3.
  • the display panel includes the retardation layer 3 shown in FIG. uneven.
  • FIG. 5 and FIG. 6 are schematic structural diagrams of an exemplary embodiment of the display panel of the present disclosure.
  • the display panel may include a display substrate 2 , a retardation layer 3 and a polarizer 4
  • the retardation layer 3 is arranged on the display side of the display substrate 2; the polarizer 4 is arranged on the side of the retardation layer 3 away from the display substrate 2, and the direction of the absorption axis of the polarizer 4 is parallel or perpendicular to the stretching direction, and the polarized light is
  • the angle between the absorption axis of the sheet 4 and the optical axis of the retardation layer 3 is not equal to 0° and 90°.
  • the corners of the polarizer 4 are affected by the shrinkage in the stretching direction and the shrinkage in the direction perpendicular to the stretching direction.
  • the shrinkage rate at the corner is the largest and the shrinking direction forms a certain angle with the stretching direction, so the pulling force on the retardation layer 3 at the corner is also greater, the display panel makes the optical axis of the retardation layer 3 and stretching
  • the included angle of the direction is not equal to 0° and 90°, so that at the corner with the largest shrinkage rate, the angle between the optical axis of the retardation layer 3 and the shrinking direction decreases, and the shrinkage force of the polarizer 4 at the remaining positions is in the phase difference.
  • the component force in the direction of the optical axis of the layer 3 is reduced, so that the influence of the contraction force on the optical axis of the retardation layer 3 is relatively uniform, and finally the phenomenon of uneven hue is reduced.
  • the polarizer 4 and the retardation layer 3 can avoid reflecting the ambient light to the observer, thereby reducing the influence of the ambient light on the display effect and improving the display effect.
  • the vertical mentioned in the exemplary embodiments of the present disclosure is not completely vertical, but has a certain error, and the error range can be ⁇ 5°, that is, the two are perpendicular to each other, which refers to the sandwich between the two.
  • the angle is greater than or equal to 85° and less than or equal to 95°.
  • the display panel may further include a backplane 6, and a display substrate 2 is provided on one side of the backplane 6, and the display substrate 2 may include a thin film transistor array layer and a light-emitting functional layer; the thin film transistor array layer is provided on the back On one side of the board 6 , the light-emitting functional layer is disposed on the side of the thin film transistor array away from the back board 6 .
  • the light-emitting functional layer may include a first electrode, a light-emitting layer, and a second electrode that are stacked in sequence.
  • the first electrode is an anode
  • the second electrode is a cathode
  • the light-emitting layer includes a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, and the like.
  • the thin film transistor array layer drives the light emitting functional layer to emit light.
  • the light-emitting functional layer emits light toward the transparent cover plate 1 .
  • the light of the light-emitting functional layer is emitted through the retardation layer 3 , the polarizer 4 and the transparent cover plate 1 .
  • the display substrate 2 may also include a fingerprint recognition function layer, a touch function layer, and the like.
  • the anode In order to improve the injection efficiency of holes, the anode should be made of materials with the highest possible work function, and a common material is ITO (indium tin oxide or tin-doped indium oxide).
  • ITO indium tin oxide or tin-doped indium oxide.
  • the commonly used cathode material is Mg-Ag magnesium-silver alloy, because it is a metal material , it is easy to reflect the external ambient light, resulting in a greatly reduced contrast observed by the user.
  • a first adhesive layer 51 is provided on the side of the display substrate 2 away from the backplane 6 , and the material of the first adhesive layer 51 may be PSA (pressure sensitive adhesive), and PSA is a A class of adhesives that are sensitive to pressure.
  • PSA pressure sensitive adhesive
  • PSA is a A class of adhesives that are sensitive to pressure.
  • the material of the first adhesive layer 51 may also be OCA (Optically Clear Adhesive) optical adhesive.
  • a retardation layer 3 is provided on the side of the first adhesive layer 51 away from the back plate 6, and the retardation layer 3 may include a 1/4 ⁇ retardation film 31 and a 1/2 ⁇ retardation film 32; the wavelength range of ambient light in nature The coverage is very wide.
  • the conventional 1/4 ⁇ retardation film 31 can generally only correspond to a single wavelength. To achieve an ideal wide wavelength compensation effect, it is generally necessary to use more than two layers of retardation film for addition and subtraction. For example, using refraction The material with little difference in rate distribution is made into 1/2 ⁇ retardation film 32, and then combined with the 1/4 ⁇ retardation film 31 with normal distribution of narrow band, the 1/2 ⁇ retardation film 32 is set far away from the 1/4 ⁇ retardation film 31.
  • the 1/4 ⁇ retardation film 31 is disposed between the 1/2 ⁇ retardation film 32 and the display substrate 2 , so as to achieve broadband coverage in the visible light band.
  • the stacking of different retardation films achieves true blackness, and only the display of the 1/4 ⁇ retardation film 31 is slightly bluish.
  • a second adhesive layer 52 is disposed on the side of the retardation layer 3 away from the back plate 6 .
  • the material of the second adhesive layer 52 may be PSA.
  • the material of the first adhesive layer 51 may also be OCA optical adhesive.
  • the thickness of the second adhesive layer 52 is about 25 microns.
  • a polarizer 4 is disposed on the side of the second adhesive layer 52 away from the back plate 6 , and the polarizer 4 is a linear polarizer.
  • the polarizer 4 may include a first protective layer 41, a polarizing layer 42 and a second protective layer 43; the first protective layer 41 is provided on the side of the second adhesive layer 52 away from the display substrate 2; the polarizing layer 42 is provided on the first protective layer The side of the layer 41 away from the display substrate 2 ; the second protective layer 43 is provided on the side of the polarizing layer 42 away from the display substrate 2 .
  • the material of the first protective layer 41 and the second protective layer 43 may be TAC (triacetate film).
  • the first protective layer 41 and the second protective layer 43 support, protect and prevent retraction of the polarizing layer 42, and the thicknesses of the first protective layer 41 and the second protective layer 43 are both greater than or equal to 25 microns and less than or equal to 40 microns .
  • the material of the polarizing layer 42 may be PVA (polyvinyl alcohol).
  • the polarizing layer 42 is a polarizing mechanism functional layer, and its thickness is greater than or equal to 7 micrometers and less than or equal to 12 micrometers.
  • the polarizer 4 may include a polarizer layer 42 and a second protective layer 43, that is, the polarizer 4 may not include the first protective layer 41, and the polarizer layer 42 may be directly bonded to the second adhesive The side of the layer 52 remote from the display substrate 2 .
  • the angle between the optical axis L1 of the 1/4 ⁇ retardation film 31 and the absorption axis of the polarizer 4 is ⁇ 1
  • the optical axis L2 of the 1/2 ⁇ retardation film 32 is the same as the polarized light.
  • the included angle of the absorption axis of the sheet 4 is ⁇ 2.
  • ⁇ 2 when ⁇ 1 is 15°, ⁇ 2 can be 75°; when ⁇ 1 is 75°, ⁇ 2 can be 15°.
  • the linear polarizer 4 When the linear polarizer 4 is combined with the 1/2 ⁇ retardation film 32 and the 1/4 ⁇ retardation film 31, the natural light is converted into linearly polarized light after passing through the surface polarizer 4, and the polarization direction of the linearly polarized light is the same as that of the polarizer 4.
  • the absorption axis of the layers is vertical.
  • a phase difference of ⁇ will be generated between the electric vector and the magnetic vector, but it is still linearly polarized light, and the polarization direction is rotated by 180°.
  • a phase difference of ⁇ /2 is generated between the electric vector and the magnetic vector, and the linearly polarized light is converted into a right-handed (or left-handed) circularly polarized light, the right-handed (or left-handed) circularly polarized light.
  • the left-handed (or right-handed) circularly polarized light is converted into left-handed (or right-handed) circularly polarized light after being reflected by the cathode metal electrode of the display substrate 2, and the left-handed (or right-handed) circularly polarized light passes through a 1/4 ⁇ phase difference again.
  • the retardation layer 3 may include only the 1/4 ⁇ retardation film 31 without providing the 1/2 ⁇ retardation film 32 .
  • the angle between the optical axis of the 1/4 ⁇ retardation film 31 and the absorption axis of the polarizer 4 is about 45°.
  • the angle between the direction of the absorption axis of the polarizer 4 and the optical axis of the retardation layer 3 is not limited to the above description.
  • the angle between the direction of the absorption axis of the polarizer 4 and the optical axis of the retardation layer 3 can also be 30° , 60°, 80°, etc., as long as it is not equal to 0° and 90°, because when the angle between the absorption axis direction of the polarizer 4 and the optical axis of the retardation layer 3 is equal to 0°, the light will be completely absorbed. Cannot pass through; when the angle between the absorption axis direction of the polarizer 4 and the optical axis of the retardation layer 3 is equal to 90°, all the light rays will pass through and cannot form circularly polarized light.
  • the external ambient light passes through the polarizer 4 to form the first linearly polarized light; Polarized light or right circularly polarized light; left circularly polarized light or right circularly polarized light after being reflected by the cathode metal electrode of the display substrate 2, rotated 180° to become right circularly polarized light or left circularly polarized light; right circularly polarized light or left circularly polarized light
  • the light passes through the 1/4 ⁇ retardation film 31, it is converted into a second polarized light; the polarization direction of the second polarized light is perpendicular to the polarization direction of the first polarized light; the second polarized light cannot pass through the polarizer 4 and cannot be emitted.
  • the external ambient light is blocked in the display panel, which greatly improves the contrast ratio of the display panel itself, and the screen content can be clearly seen even under strong sunlight.
  • FIGS. 7-9 the test schematic diagrams of the shrinkage rate in two directions after the reliability of the polarizer 4 in different environments are shown.
  • the shrinkage rate of the polarizer 4 in both the first direction and the second direction is about -0.1; at a temperature of about In an environment of 85° C., after about 500 hours of reliability, the shrinkage rate of the polarizer 4 in both the first direction and the second direction was about -0.56.
  • FIG. 7 in an environment with a temperature of about 85° C., after a reliability of about 250 hours, the shrinkage rate of the polarizer 4 in both the first direction and the second direction is about -0.1; at a temperature of about In an environment of 85° C., after about 500 hours of reliability, the shrinkage rate of the polarizer 4 in both the first direction and the second direction was about -0.56.
  • FIG. 7 in an environment with a temperature of about 85° C., after a reliability of about 250 hours, the shrinkage rate of the polarizer 4 in both the first direction and the
  • the shrinkage rate of the polarizer 4 in the first direction is about -0.07 in the first direction
  • the shrinkage in the second direction is about -0.07 after about 250 hours of reliability in an environment with a temperature of about 60°C and a humidity of about 90%.
  • the shrinkage rate of polarizer 4 is about -0.16; in an environment with a temperature of about 60°C and a humidity of about 90%, after about 500 hours of reliability, the shrinkage rate of the polarizer 4 in the first direction is about -0.06, in the first
  • the shrinkage in both directions is about -0.20.
  • the shrinkage rate of the polarizer 4 in the first direction is about -0.08 after the temperature shock reliability is about 50 times, and the shrinkage rate in the second direction is about -0.37; the temperature shock reliability is about 100
  • the shrinkage ratio of the secondary rear polarizer 4 in the first direction was about -0.08, and the shrinkage ratio in the second direction was about -0.43.
  • the second direction may be a stretching direction, and the first direction may be a direction perpendicular to the stretching direction.
  • the shrinkage rate of the polarizer 4 in the first direction is small, and the shrinkage rate in the first direction does not change much with the increase of time and number of times;
  • the shrinkage rate of the polarizer 4 in the second direction is relatively large, and the shrinkage rate in the second direction slightly increases with the increase of time and number of times.
  • the shrinkage ratio at the corners is the largest.
  • the shrinkage force of the polarizer 4 in the stretching direction is large, at the corners of the polarizer 4, due to the influence of the shrinkage rate in the stretching direction and the shrinkage rate in the direction perpendicular to the stretching direction, the shrinkage rate at the corners is the largest and The shrinking direction and the stretching direction form a certain angle, so the pulling force on the retardation layer 3 at the corner is also greater, and the display panel makes the angle between the optical axis of the retardation layer 3 and the stretching direction not equal to 0° and 90°, so that at the corner with the largest shrinkage rate, the angle between the optical axis of the retardation layer 3 and the shrinking direction is reduced, and at other positions the shrinkage force of the polarizer 4 is the component force of the optical axis direction of the retardation layer 3 Therefore, the effect of the shrinkage force on the optical axis of the retardation layer 3 is relatively uniform, and finally the phenomenon of uneven hue is reduced. Referring to the schematic diagram of the display effect of the display panel of the present disclosure shown in FIG. 10
  • a third adhesive layer 53 is disposed on the side of the polarizer 4 away from the display substrate 2 , and the material of the third adhesive layer 53 may be OCA optical adhesive.
  • the thickness of the third adhesive layer 53 is greater than or equal to 0.15 mm, the shrinkage rate of the polarizing layer 42 can be reduced by the thicker third adhesive layer 53 , that is, the shrinkage of the polarizing layer 42 can be suppressed, thereby reducing the effect of the polarizing layer 42 on the retardation layer 3
  • the material of the third adhesive layer 53 can also be PSA.
  • the transparent cover plate 1 is provided on the side of the third adhesive layer 53 away from the display substrate 2 .
  • the transparent cover 1 may include a flat portion 11 and a bent portion 12
  • the flat portion 11 may be configured as a rectangle, that is, the flat portion 11 has two long sides and two short sides.
  • the two short sides of the plane portion 11 are connected in a one-to-one correspondence with two bent portions 12 , and the two bent portions 12 may be symmetrical to each other.
  • An extension plane portion 13 may also be connected to the side of the bending portion 12 away from the plane portion 11 , and the extension plane portion 13 and the bending portion 12 transition smoothly.
  • the extension direction of the bent portion 12 is consistent with the extension direction of the short side of the flat portion 11 , that is, the extension direction of the bent portion 12 is the extension direction of the edge of the flat portion 11 connected by the bent portion 12 .
  • one edge of the plane portion 11 can also be connected with a bent portion 12, or three or four edges of the plane portion 11 can be connected with three or four bent portions in a one-to-one correspondence.
  • the bent portion 12 extends along the edge of the flat portion 11 , the thickness of the flat portion 11 and the bent portion 12 are substantially the same, and the flat portion 11 and the bent portion 12 transition smoothly.
  • the bending angle ⁇ may be 80°, 88°, 90°, 110°, 120°, etc.
  • the bending angle ⁇ may be the tangent between the extension line of the flat portion 11 and the side of the bending portion 12 away from the flat portion 11
  • the formed included angle ⁇ ; the bending angle ⁇ may also be the included angle ⁇ formed by the extension line of the flat portion 11 and the extension line of the extension flat portion 13 .
  • the bent portion 12 may have a first bent surface 121 and a second bent surface 122 .
  • the curvature radius of the first folded curved surface 121 may gradually increase from the edges on both sides connected to the flat surface portion 11 and the extending flat surface portion 13 to the middle portion; similarly, in the On a cross section perpendicular to the extending direction, the curvature radius of the second bending surface 122 may gradually increase from the edges on both sides connected to the flat surface portion 11 and the extending flat surface portion 13 to the middle portion.
  • the radius of curvature of the first bending surface 121 may gradually decrease from the two edges connected to the flat portion 11 and the extending flat portion 13 to the middle portion, and the radius of curvature of the second bending surface 122 is gradually reduced from the edge connected to the flat portion 11 to the middle portion. And the edges of the two sides connected by the extending plane portion 13 gradually decrease toward the middle.
  • the first folded and curved surface 121 can be set as a circular arc surface, so that the radius of curvature of the first folded and curved surface 121 is the same everywhere; the second folded and curved surface 122 can also be set It is a circular arc surface, so that the radius of curvature of the second bending surface 122 is the same everywhere. Since the thickness of the bent portion 12 is substantially the same, the radius of curvature of the second bent surface 122 may be larger than the radius of curvature of the first bent surface 121 .
  • the second bending surface 122 is located on the side away from the display assembly; in the section perpendicular to the extending direction, the length of the second arc on the second bending surface 122 is greater than the length of the first arc located on the first bending surface 121
  • the second bending surface 122 is located outside the bending portion 12 .
  • first bending surface 121 can be set as an elliptical arc surface or a parabolic arc surface, etc., that is, the cross section of the first bending and bending surface 121 perpendicular to the extension direction can be an elliptical arc or a parabola, etc.;
  • the two-fold curved surface 122 can be set as an elliptical arc surface or a parabolic arc surface, that is, a section perpendicular to the extending direction of the second curved curved surface 122 can be an elliptical arc or a parabola and the like.
  • the third adhesive layer 53 is pasted on the inner side of the flat portion 11 and the bent portion 12 of the transparent cover 1 , and the polarizer 4 is pasted on the flat portion 11 and the bent portion 12 of the transparent cover 1 through the third adhesive layer 53 . Bend the inner side so that the two sides of the polarizer 4 also form a bending area that is compatible with the bending portion 12 of the transparent cover 1 , and the retardation layer 3 is pasted on the polarizer 4 away from the transparent through the second adhesive layer 52. one side of the cover plate 1.
  • the bent transparent cover 1 suppresses the shrinkage of the polarizing layer 42, thereby reducing the pulling of the polarizing layer 42 on the retardation layer 3, reducing the optical axis change of the retardation layer 3, and reducing the uneven hue caused by the optical axis change.
  • the inner side of the bending refers to the side where the center of the first bending surface 121 and the center of the second bending surface 122 of the bending portion 12 are located.
  • the inner side of the bending may also be a plurality of arc centers of the first bending surface 121 of the bending portion 12 and the On the side where the arc centers of the second bending surface 122 are located, since the elliptical arc or the parabola is formed by a plurality of arcs, the arc center is the center of the circle to which the arc belongs.
  • the outside of the bend refers to the side opposite to the inside of the bend.
  • the material of the transparent cover plate 1 may be glass, and the transparent cover plate 1 may be formed by thermoplastically bending flat glass.
  • the material of the transparent cover plate 1 may also be rigid plastic, resin, or the like.
  • example embodiments of the present disclosure further provide a display device, and the display device may include the display panel described in any one of the above.
  • the specific structure of the display panel has been described in detail above, and therefore will not be repeated here.
  • the specific type of the display device is not particularly limited, and any type of display device commonly used in the art can be used, such as mobile devices such as mobile phones, wearable devices such as watches, VR devices, etc.
  • the specific use of the device should be selected accordingly, which will not be repeated here.
  • the display device also includes other necessary components and components, taking a mobile phone as an example, such as a casing, a circuit board, a power cord, etc.
  • a mobile phone such as a cord, a cord, etc.
  • the specific usage requirements will be supplemented accordingly, which will not be repeated here.
  • the beneficial effects of the display device provided by the exemplary embodiments of the present invention are the same as the beneficial effects of the display panel provided by the above-mentioned exemplary embodiments, which will not be repeated here.

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Abstract

本公开涉及显示技术领域，公开了一种显示面板和显示装置，该显示面板包括显示基板、相位差层和偏光片；相位差层设于显示基板的显示侧；偏光片设于相位差层的远离显示基板的一侧，偏光片的吸收轴的方向与偏光片的拉伸方向平行或垂直，且偏光片的吸收轴与相位差层的光轴的夹角不等于0°和90°。该显示面板使偏光片的收缩力对相位差层的光轴的影响较为均匀，减弱色相不均的现象。

Description

显示面板和显示装置
交叉引用
本公开要求于2021年1月25日提交的申请号为202110095787.4名称为“显示面板和显示装置”的中国专利申请的优先权，该中国专利申请的全部内容通过引用全部并入本文。
技术领域
本公开涉及显示技术领域，具体而言，涉及一种显示面板和包括该显示面板的显示装置。
背景技术
随着OLED(OrganicElectroluminesence Display，有机发光半导体)显示技术的快速发展，客户对手机熄屏状态的色相要求越来越严格，既对信赖性前的一体黑效果有要求，又要限定信赖性后色相均匀性。为了应用在FMLOC(Flexible Multi-Layer On Cell，柔性多层结构)产品上，FMLOC是指在显示面板的封装基板上制作金属网格电极层，从而进行触控控制，无需外挂TSP(Touch Sensor Panel，触摸屏)。该工艺可以减小屏幕厚度，进而有利于折叠；同时没有贴合公差，可减小边框宽度。
目前，现有的显示面板会产生色相不均匀的现象，而且环境光对显示效果的影响较大，特别是强环境光下较难看清楚显示画面。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本公开的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
公开内容
本公开的目的在于克服上述现有技术的不足，提供一种色相较均的显示面板和包括该显示面板的显示装置。
根据本公开的一个方面，提出一种显示面板，包括：
显示基板；
相位差层，设于所述显示基板的显示侧；
偏光片，设于所述相位差层的远离所述显示基板的一侧，所述偏光片的吸收轴的方向与所述偏光片的拉伸方向平行或垂直，且所述偏光片的吸收轴与所述相位差层的光轴的夹角不等于0°和90°。
在本公开的一种示例性实施例中，所述相位差层包括1/4λ相位差膜。
在本公开的一种示例性实施例中，所述1/4λ相位差膜的光轴与所述偏光片的吸收轴的夹角为45°。
在本公开的一种示例性实施例中，所述相位差层还包括1/2λ相位差膜，所述1/2λ相位差膜设于所述1/4λ相位差膜与所述偏光片之间。
在本公开的一种示例性实施例中，所述1/4λ相位差膜的光轴与所述偏光片的吸收轴的夹角为θ1，所述1/2λ相位差膜的光轴与所述偏光片的吸收轴的夹角为θ2，所述θ1大于等于10°且小于等于20°或所述θ1大于等于70°且小于90°，相应的，所述θ2大于等于70°且小于90°或所述θ2大于等于10°且小于等于20°。
在本公开的一种示例性实施例中，所述θ1为15°时，所述θ2为75°；或所述θ1为75°时，所述θ2为15°。
在本公开的一种示例性实施例中，所述显示面板还包括：
第三胶层，设于所述偏光片的远离所述显示基板的一侧；
透明盖板，设于所述第三胶层的远离所述显示基板的一侧。
在本公开的一种示例性实施例中，所述第三胶层的厚度大于等于0.15mm。
在本公开的一种示例性实施例中，所述透明盖板包括：
平面部；
折弯部，连接于所述平面部的相对两侧边沿，并与所述平面部平滑过度。
在本公开的一种示例性实施例中，所述第三胶层、所述偏光片以及所述相位差层依次层叠于所述平面部的一侧和所述折弯部的折弯内侧。
在本公开的一种示例性实施例中，所述偏光片包括：
偏光层，设于所述相位差层的远离所述显示基板的一侧；
第二保护层，设于所述偏光层的远离所述显示基板的一侧。
在本公开的一种示例性实施例中，所述偏光片还包括：
第一保护层，设于所述相位差层与所述偏光层之间。
在本公开的一种示例性实施例中，所述显示基板包括薄膜晶体管阵列层和发光功能层；所述发光功能层包括第一电极、发光层和第二电极。
根据本公开的另一个方面，提出了一种显示装置，包括上述任意一项所述的显示面板。
本公开的显示面板和显示装置，在显示基板的显示侧设置有相位差层，在相位差层的远离显示基板的一侧设置有偏光片，偏光片的吸收轴的方向与拉伸方向平行或垂直，且偏光片的吸收轴与相位差层的光轴的夹角不等于0°和90°。一方面，由于偏光片在拉伸方向上的收缩力较大，该显示面板使得相位差层的光轴与拉伸方向的夹角不等于0°和90°，使得相位差层各处的光轴与收缩方向的均形成不等于0°和90°的夹角，而且在其余位置偏光片的收缩力在相位差层的光轴方向的分力减小，从而使收缩力对相位差层的光轴的影响较为均匀，最终减弱色相不均的现象。另一方面，通过偏光片和相位差层能够避免将环境光反射至观察者，从而减小环境光对显示效果的影响，提高显示效果。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为相关技术中相位差层的光轴分布示意图。
图2为图1中的相位差层受到的牵拉力的分布示意图。
图3为图1中的相位差层受牵拉力后的光轴分布示意图。
图4为包括图3中相位差层的显示面板的显示效果示意图。
图5为本公开显示面板一示例实施方式的结构示意图。
图6为图5中相位差层的光轴夹角示意图。
图7-图9为偏光片在不同环境的信赖性后的两个方向的收缩率测试示意图。
图10为本公开显示面板的显示效果示意图。
图11为图5中的透明盖板一示例实施方式的结构示意图。
图12为图5中的透明盖板另一示例实施方式的结构示意图。
附图标记说明：
1、透明盖板；11、平面部；12、折弯部；121、第一折弯曲面；122、第二折弯曲面；13、延伸平面部；
2、显示基板；
3、相位差层；31、1/4λ相位差膜；32、1/2λ相位差膜；
4、偏光片；41、第一保护层；42、偏光层；43、第二保护层；
51、第一胶层；52、第二胶层；53、第三胶层；
6、背板。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本公开将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。此外，附图仅为本公开的示意性图解，并非一定是按比例绘制。
虽然本说明书中使用相对性的用语，例如“上”“下”来描述图标的一个组件对于另一组件的相对关系，但是这些术语用于本说明书中仅出于方便，例如根据附图中所述的示例的方向。能理解的是，如果将图标的装置翻转使其上下颠倒，则所叙述在“上”的组件将会成为在“下”的组件。当某结构在其它结构“上”时，有可能是指某结构一体形成于其它结构上，或指某结构“直接”设置在其它结构上，或指某结构通过另一结构“间接”设置在其它结构上。
用语“一个”、“一”、“该”、“所述”和“至少一个”用以表示存在一个或多个要素/组成部分/等；用语“包括”和“具有”用以表示开放式的包括在内的意思并且是指除了列出的要素/组成部分/等之外还可存在另外的要素/组成部分/等；用语“第一”、“第二”和“第三”等仅作为标记使用，不是对其对象的数量限制。
在相关技术中，由于工艺原因导致使用的偏光片的偏光层(PVA，聚乙烯醇)偏厚，偏光层越厚，越容易在信赖性条件下发生收缩，偏光层收缩造成对相位差层的拉扯，导致信赖性后显示面板色相不均，影响手机一体黑效果。偏光层收缩是拉伸型偏光层的固有属性，减薄偏光层可减轻收缩现象，但是在FMLOC产品上容易发生信赖性后边缘褪色(即偏光层失效)的现象。
参照图1所示的相位差层3的光轴分布示意图，图中箭头表示相位差层3的光轴方向，图中的相位差层3的光轴方向一致且均匀排列。参照图2所示的相位差层3受到的牵拉力的分布示意图，图中箭头表示相位差层3受到的牵拉力的大小和方向，图中相位差层3拐角处受到的牵拉力最大。参照图3所示的相位差层3受牵拉力后光轴分布示意图，图中箭头表示相位差层3的光轴方向，图中的相位差层3的光轴方向不一致且不均匀排列。而且结合图1至图3可以得到，在收缩方向与光轴方向垂直或平行的情况下，收缩力对光轴的方向基本没有影响，也就是说，收缩方向与相位差层3的光轴方向的夹角仍为0°或90°；在收缩方向与光轴方向不垂直且不平行的情况下，收缩力对光轴的方向则有影响，也就是说，收缩方向与相位差层3的光轴方向产生夹角，且夹角不等于0°或90°，进而影响了显示面板的显示效果。参照图4所示的相关技术中显示面板的显示效果示意图，该显示面板包括图3中所示的相位差层3，光线通过该相位差层3后导致显示面板的两侧边沿与中部的色相不均。
本公开示例实施方式提供了一种显示面板，如图5和图6所示的本公开显示面板一示例实施方式的结构示意图，该显示面板可以包括显示基板2、相位差层3以及偏光片4；相位差层3设于显示基板2的显示侧；偏光片4设于相位差层3的远离显示基板2的一侧，偏光片4的吸收轴 的方向与拉伸方向平行或垂直，且偏光片4的吸收轴与相位差层3的光轴的夹角不等于0°和90°。
本公开的显示面板和显示装置，由于偏光片4在拉伸方向上的收缩力较大，在偏光片4的拐角处由于受到拉伸方向的收缩率和与拉伸方向垂直方向的收缩率的影响，拐角处的收缩率最大而且收缩方向与拉伸方向成一定的角度，因此在拐角处对相位差层3的牵拉力也更大，该显示面板使得相位差层3的光轴与拉伸方向的夹角不等于0°和90°，使得在收缩率最大的拐角处，相位差层3的光轴与收缩方向的夹角减小，而且在其余位置偏光片4的收缩力在相位差层3的光轴方向的分力减小，从而使收缩力对相位差层3的光轴的影响较为均匀，最终减弱色相不均的现象。另一方面，通过偏光片4和相位差层3能够避免将环境光反射至观察者，从而减小环境光对显示效果的影响，提高显示效果。
需要说明的是，在本公开示例实施方式中提到的垂直，并不是完全垂直，而是具有一定的误差，误差范围可以为±5°，即两者相互垂直是指两者之间的夹角大于等于85°且小于等于95°。
在本示例实施方式中，显示面板还可以包括背板6，在背板6的一侧设置有显示基板2，显示基板可以2包括薄膜晶体管阵列层和发光功能层；薄膜晶体管阵列层设于背板6的一侧，发光功能层设于薄膜晶体管阵列的远离背板6的一侧。发光功能层可以包括依次层叠设置的第一电极、发光层和第二电极。在发光功能层中，第一电极为阳极，第二电极为阴极，发光层包括空穴注入层、空穴传输层、发光层、电子传输层、电子注入层等。薄膜晶体管阵列层驱动发光功能层发光。发光功能层朝向透明盖板1发出光线。发光功能层的光线经过相位差层3、偏光片4、透明盖板1出射。当然，显示基板2还可以包括指纹识别功能层和触控功能层等等。
为了提高空穴的注入效率，阳极应选用尽可能高的功函数材料，常见材料为ITO(氧化铟锡或掺锡氧化铟)。对于阴极材料选择，功函数越低，有机材料与阴极之间的势垒越低，电子注入越容易，发光效率就越高，目前常用的阴极材料是Mg-Ag镁银合金，因为是金属材料，容易反射外界的环境光，造成用户观察到的对比度大大降低。
在本示例实施方式中，在显示基板2的远离背板6的一侧设置有第一胶层51，第一胶层51的材质可以是PSA(pressure sensitive adhesive，压敏胶)，PSA是一类具有对压力有敏感性的胶粘剂。当然，第一胶层51的材质还可以是OCA(Optically Clear Adhesive)光学胶。
在第一胶层51的远离背板6的一侧设置有相位差层3，相位差层3可以包括1/4λ相位差膜31和1/2λ相位差膜32；自然界的环境光的波长范围覆盖很宽，常规的1/4λ相位差膜31，一般只能对应单波长，若要达到理想的宽波长补偿效果，一般必须使用两层以上的相位差膜进行加成消减，例如，使用折射率分布差异不大的材料做成1/2λ相位差膜32，再结合窄波段正常分布的1/4λ相位差膜31，1/2λ相位差膜32设于1/4λ相位差膜31的远离显示基板2的一侧，即1/4λ相位差膜31设于1/2λ相位差膜32与显示基板2之间，即可达到可见光波段形成宽波段覆盖。不同相位差膜堆叠达到真正一体黑，仅有1/4λ相位差膜31的显示有轻微发蓝。
在相位差层3的远离背板6的一侧设置有第二胶层52，第二胶层52的材质可以是PSA，当然，第一胶层51的材质还可以是OCA光学胶。第二胶层52的厚度大约为25微米。
在第二胶层52的远离背板6的一侧设置有偏光片4，偏光片4为线偏光片。偏光片4可以包括第一保护层41、偏光层42以及第二保护层43；第一保护层41设于第二胶层52的远离显示基板2的一侧；偏光层42设于第一保护层41的远离显示基板2的一侧；第二保护层43设于偏光层42的远离显示基板2的一侧。第一保护层41和第二保护层43的材质可以是TAC(三醋酸纤维薄膜)。第一保护层41和第二保护层43对偏光层42起到支撑、保护以及防止回缩的作用，第一保护层41和第二保护层43的厚度均大于等于25微米且小于等于40微米。当然，第一保护层41和第二保护层43越薄越利于显示面板的折弯。偏光层42的材质可以是PVA(聚乙烯醇)。偏光层42是偏光机制功能层，其厚度大于等于7微米且小于等于12微米。
另外，在公开的其他示例实施方式中，偏光片4可以包括偏光层42以及第二保护层43，即偏光片4可以不包括第一保护层41，将偏光层 42直接粘接在第二胶层52的远离显示基板2的一侧。
在本示例实施方式中，参照图6所示，1/4λ相位差膜31的光轴L1与偏光片4的吸收轴的夹角为θ1，1/2λ相位差膜32的光轴L2与偏光片4的吸收轴的夹角为θ2。当θ1大于等于10°且小于等于20°时，θ2大于等于70°且小于90°；当θ1大于等于70°且小于90°时，θ2大于等于10°且小于等于20°。
例如，θ1为15°时，θ2可以为75°；θ1为75°时，θ2可以为15°。
在线偏光片4和1/2λ相位差膜32、1/4λ相位差膜31结合的情况下，自然光在通过表层偏光片4层后转变为线偏振光，该线偏振光偏振方向与偏光片4层的吸收轴垂直。该线偏振光在经过1/2λ相位差膜32后其电矢量和磁矢量会产生一个π的位相差，但仍是线偏振光，偏振方向旋转180°。该线偏振光经过1/4λ相位差膜31后其电矢量和磁矢量产生一个π/2的位相差，该线偏振光转变为右旋(或左旋)的圆偏振光，该右旋(或左旋)的圆偏振光在经过显示基板2的阴极金属电极反射后，转变为左旋(或右旋)的圆偏振光，该左旋(或右旋)的圆偏振光，再次经过1/4λ相位差膜31后，其电矢量和磁矢量又会产生一个π/2的位相差，转变为线偏振光，该线偏振光的偏振方向正好与偏光片4的吸收轴方向平行，该偏振光再次经过1/2λ相位差膜32后其电矢量和磁矢量会产生一个π的位相差，但仍是线偏振光，偏振方向旋转180°，但仍然与偏光片4的吸收轴方向平行，被偏光片4的吸收轴吸收，从而避免了反射光进入人眼，减少了显示基板2的阴极金属电极的反射作用，起到了提高OLED显示器对比度的作用。
在本公开的其他示例实施方式中，相位差层3可以仅包括1/4λ相位差膜31，而没有设置1/2λ相位差膜32。此时，1/4λ相位差膜31的光轴与偏光片4的吸收轴的夹角大约为45°。当然，偏光片4的吸收轴方向与相位差层3的光轴的夹角不限于上述说明，例如，偏光片4的吸收轴方向与相位差层3的光轴的夹角还可以是30°、60°、80°等等，只要不等于0°和90°即可，因为，偏光片4的吸收轴方向与相位差层3的光轴的夹角等于0°时，光线将被全部吸收无法通过；偏光片4的吸收轴方向与相位差层3的光轴的夹角等于90°时，光线将全部通过无法 形成圆偏振光。
在偏光片和1/4λ相位差膜31结合的情况下，外界环境光经过偏光片4后形成第一线偏振光；该第一偏振光经过1/4λ相位差膜31后，转成左圆偏振光或右圆偏振光；左圆偏振光或右圆偏振光经过显示基板2的阴极金属电极反射后，旋转180°成为右圆偏振光或左圆偏振光；右圆偏振光或左圆偏振光经过1/4λ相位差膜31后，转成第二偏振光；第二偏振光的偏振方向与第一偏振光的偏振方向垂直；第二偏振光无法通过偏光片4，无法出光。经过以上步骤，将外界环境光阻隔在显示面板内，大大提升显示面板本身的对比度，即使在强烈的太阳光底下，也可清晰看见屏幕内容。
参照图7-图9所示的偏光片4在不同环境的信赖性后的两个方向的收缩率测试示意图。在图7中，在温度大约为85℃的环境中，进行大约250小时的信赖性后，偏光片4在第一方向和第二方向上的收缩率都是大约为-0.1；在温度大约为85℃的环境中，进行大约500小时的信赖性后，偏光片4在第一方向和第二方向上的收缩率都是大约为-0.56。在图8中，在温度大约为60℃湿度大约为90％的环境中，进行大约250小时的信赖性后，偏光片4在第一方向上的收缩率大约为-0.07，在第二方向上的收缩率大约为-0.16；在温度大约为60℃湿度大约为90％的环境中，进行大约500小时的信赖性后，偏光片4在第一方向上的收缩率大约为-0.06，在第二方向上的收缩率大约为-0.20。在图9中，在温度冲击信赖性大约50次后偏光片4在第一方向上的收缩率大约为-0.08，在第二方向上的收缩率大约为-0.37；在温度冲击信赖性大约100次后偏光片4在第一方向上的收缩率大约为-0.08，在第二方向上的收缩率大约为-0.43。第二方向可以为拉伸方向，第一方向可以为与拉伸方向垂直的方向。
因此，可以得到：在上述多种情况的信赖性后，偏光片4在第一方向上的收缩率都较小，而且在第一方向上的收缩率随时间和次数的增加没有多大的改变；偏光片4在第二方向上的收缩率都较大，而且在第二方向上的收缩率随时间和次数的增加稍有增加。
在偏光片4的拐角处由于受到第一方向的收缩率和第二方向的收缩率的影响，拐角处的收缩率最大。
由于偏光片4在拉伸方向上的收缩力较大，在偏光片4的拐角处由于受到拉伸方向的收缩率和与拉伸方向垂直方向的收缩率的影响，拐角处的收缩率最大而且收缩方向与拉伸方向成一定的角度，因此在拐角处对相位差层3的牵拉力也更大，该显示面板使得相位差层3的光轴与拉伸方向的夹角不等于0°和90°，使得在收缩率最大的拐角处，相位差层3的光轴与收缩方向的夹角减小，而且在其余位置偏光片4的收缩力在相位差层3的光轴方向的分力减小，从而使收缩力对相位差层3的光轴的影响较为均匀，最终减弱色相不均的现象。参照图10所示的本公开显示面板的显示效果示意图，图中显示较图4更为均匀。
在本示例实施方式中，在偏光片4的远离显示基板2的一侧设置有第三胶层53，第三胶层53的材质可以是OCA光学胶。第三胶层53的厚度大于或等于0.15毫米，通过较厚的第三胶层53可以降低偏光层42的收缩率，即抑制偏光层42的收缩，从而减轻偏光层42对相位差层3的牵拉，减轻相位差层3的光轴变化，减轻光轴变化导致的色相不均。当然，第三胶层53的材质也可以是PSA。
在本示例实施方式中，在第三胶层53的远离显示基板2的一侧设置有透明盖板1。参照图11和图12所示，透明盖板1可以包括平面部11和折弯部12，平面部11可以设置为长方形，即平面部11具有两个长边和两个短边。在平面部11的两短边一一对应的连接有两个折弯部12，两个折弯部12可以是相互对称的。在折弯部12的远离平面部11的一侧还可以连接有延伸平面部13，延伸平面部13与折弯部12平滑过渡。
折弯部12的延伸方向与平面部11的短边延伸方向是一致的，即折弯部12的延伸方向就是折弯部12连接的平面部11的边沿的延伸方向。
当然，根据实际需要也可以是在平面部11的一个边沿连接有一个折弯部12，还可以是在平面部11的三个或四个边沿一一对应的连接有三个或四个折弯部12。折弯部12沿平面部11的边沿延伸，平面部11和折弯部12的厚度基本相同，平面部11与折弯部12平滑过渡。折弯角度α可以是80°、88°、90°、110°、120°等等，折弯角度α可以是平面部11的延伸线与折弯部12的远离平面部11的一侧的切线形成的夹角α；折弯角度α也可以是平面部11的延伸线与延伸平面部13的延伸线 形成的夹角α。
折弯部12可以具有第一折弯曲面121和第二折弯曲面122。在本示例实施方式中，在与延伸方向垂直的截面上，第一折弯曲面121的曲率半径可以从与平面部11以及延伸平面部13连接的两侧边沿向中部逐渐增大；同样，在与延伸方向垂直的截面上，第二折弯曲面122的曲率半径可以从与平面部11以及延伸平面部13连接的两侧边沿向中部逐渐增大。当然，也可以是，第一折弯曲面121的曲率半径从与平面部11以及延伸平面部13连接的两侧边沿向中部逐渐减小，第二折弯曲面122的曲率半径从与平面部11以及延伸平面部13连接的两侧边沿向中部逐渐减小。
另外，在本公开的其他示例实施方式中，第一折弯曲面121可以设置为圆弧面，使得第一折弯曲面121的各处的曲率半径都相同；第二折弯曲面122也可以设置为圆弧面，使得第二折弯曲面122的各处的曲率半径都相同。由于折弯部12的厚度基本相同，因此，第二折弯曲面122的曲率半径可以大于第一折弯曲面121的曲率半径。第二折弯曲面122位于远离显示组件的一侧；在与延伸方向垂直的截面上，位于第二折弯曲面122上的第二弧线的长度大于位于第一折弯曲面121上的第一弧线的长度；即第一折弯曲面121位于折弯部12的折弯内侧，第二折弯曲面122位于折弯部12的折弯外侧。
还有，第一折弯曲面121可以设置为椭圆弧面或抛物线弧面等等，即第一折弯曲面121的与延伸方向垂直的截面可以是椭圆弧线或抛物线等等；同理，第二折弯曲面122可以设置为椭圆弧面或抛物线弧面等等，即第二折弯曲面122的与延伸方向垂直的截面可以是椭圆弧线或抛物线等等。
第三胶层53粘贴在透明盖板1的平面部11和折弯部12的折弯内侧，偏光片4通过第三胶层53粘贴在透明盖板1的平面部11和折弯部12的折弯内侧，使得偏光片4的两侧边沿也形成与透明盖板1的折弯部12相适配的折弯区域，相位差层3通过第二胶层52粘贴在偏光片4的远离透明盖板1的一侧。折弯后的透明盖板1抑制了偏光层42的收缩，从而减轻偏光层42对相位差层3的牵拉，减轻相位差层3的光轴变化，减轻 光轴变化导致的色相不均。
所谓折弯内侧指的是折弯部12的第一折弯曲面121的圆心和第二折弯曲面122的圆心所在的一侧。在第一折弯曲面121和第二折弯曲面122设置为椭圆弧面或抛物线弧面的情况下，折弯内侧也可以是折弯部12的第一折弯曲面121的多个弧心和第二折弯曲面122的多个弧心所在的一侧，由于椭圆弧线或抛物线是由多个圆弧形成的，弧心是该弧所属圆的圆心。所谓折弯外侧指的是与折弯内侧相对的一侧。
透明盖板1的材质可以是玻璃，透明盖板1可以通过将平板玻璃进行热塑性折弯形成。当然，透明盖板1的材质还可以是硬质塑料、树脂等等。
进一步的，本公开的示例实施方式还提供了一种显示装置，该显示装置可以包括上述任意一项所述的显示面板。显示面板的具体结构上述已经进行了详细说明，因此，此处不再赘述。
而该显示装置的具体类型不受特别的限制，本领域常用的显示装置类型均可，具体例如手机等移动装置、手表等可穿戴设备、VR装置等等，本领域技术人员可根据该显示设备的具体用途进行相应地选择，在此不再赘述。
需要说明的是，该显示装置除了显示面板以外，还包括其他必要的部件和组成，以手机为例，具体例如外壳、电路板、电源线，等等，本领域技术人员可根据该显示装置的具体使用要求进行相应地补充，在此不再赘述。
与现有技术相比，本发明示例实施方式提供的显示装置的有益效果与上述示例实施方式提供的显示面板的有益效果相同，在此不做赘述。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由所附的权利要求指出。

Claims (14)

  1. 一种显示面板，其中，包括：
    显示基板；
    相位差层，设于所述显示基板的显示侧；
    偏光片，设于所述相位差层的远离所述显示基板的一侧，所述偏光片的吸收轴的方向与所述偏光片的拉伸方向平行或垂直，且所述偏光片的吸收轴与所述相位差层的光轴的夹角不等于0°和90°。
  2. 根据权利要求1所述的显示面板，其中，所述相位差层包括1/4λ相位差膜。
  3. 根据权利要求2所述的显示面板，其中，所述1/4λ相位差膜的光轴与所述偏光片的吸收轴的夹角为45°。
  4. 根据权利要求2所述的显示面板，其中，所述相位差层还包括1/2λ相位差膜，所述1/2λ相位差膜设于所述1/4λ相位差膜与所述偏光片之间。
  5. 根据权利要求4所述的显示面板，其中，所述1/4λ相位差膜的光轴与所述偏光片的吸收轴的夹角为θ1，所述1/2λ相位差膜的光轴与所述偏光片的吸收轴的夹角为θ2，所述θ1大于等于10°且小于等于20°或所述θ1大于等于70°且小于90°，相应的，所述θ2大于等于70°且小于90°或所述θ2大于等于10°且小于等于20°。
  6. 根据权利要求5所述的显示面板，其中，所述θ1为15°时，所述θ2为75°；或所述θ1为75°时，所述θ2为15°。
  7. 根据权利要求1所述的显示面板，其中，
    所述显示面板还包括：
    第三胶层，设于所述偏光片的远离所述显示基板的一侧；
    透明盖板，设于所述第三胶层的远离所述显示基板的一侧。
  8. 根据权利要求7所述的显示面板，其中，所述第三胶层的厚度大于等于0.15mm。
  9. 根据权利要求7所述的显示面板，其中，所述透明盖板包括：
    平面部；
    折弯部，连接于所述平面部的相对两侧边沿，并与所述平面部平滑 过度。
  10. 根据权利要求9所述的显示面板，其中，所述第三胶层、所述偏光片以及所述相位差层依次层叠于所述平面部的一侧和所述折弯部的折弯内侧。
  11. 根据权利要求1所述的显示面板，其中，所述偏光片包括：
    偏光层，设于所述相位差层的远离所述显示基板的一侧；
    第二保护层，设于所述偏光层的远离所述显示基板的一侧。
  12. 根据权利要求11所述的显示面板，其中，所述偏光片还包括：
    第一保护层，设于所述相位差层与所述偏光层之间。
  13. 根据权利要求1所述的显示面板，其中，所述显示基板包括薄膜晶体管阵列层和发光功能层；所述发光功能层包括第一电极、发光层和第二电极。
  14. 一种显示装置，其中，包括权利要求1～13任意一项所述的显示面板。
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101454699A (zh) * 2006-05-30 2009-06-10 新日本石油株式会社 椭圆偏振片、椭圆偏振片的制造方法、液晶显示装置及电致发光显示装置
US20170262022A1 (en) * 2016-03-11 2017-09-14 Samsung Display Co., Ltd Flexible display device
CN108122488A (zh) * 2016-11-28 2018-06-05 三星显示有限公司 柔性显示设备
CN110298315A (zh) * 2019-06-28 2019-10-01 上海天马微电子有限公司 显示面板和显示装置
CN112864208A (zh) * 2021-01-25 2021-05-28 京东方科技集团股份有限公司 显示面板和显示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101454699A (zh) * 2006-05-30 2009-06-10 新日本石油株式会社 椭圆偏振片、椭圆偏振片的制造方法、液晶显示装置及电致发光显示装置
US20170262022A1 (en) * 2016-03-11 2017-09-14 Samsung Display Co., Ltd Flexible display device
CN108122488A (zh) * 2016-11-28 2018-06-05 三星显示有限公司 柔性显示设备
CN110298315A (zh) * 2019-06-28 2019-10-01 上海天马微电子有限公司 显示面板和显示装置
CN112864208A (zh) * 2021-01-25 2021-05-28 京东方科技集团股份有限公司 显示面板和显示装置

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