A method for improving color deviation of display panel, display panel, and display device

Abstract

The embodiment of the present application provides a method for improving the color deviation of the visual field of a display panel, a display panel, and a display device. The display panel includes a first color light-emitting device and a composite film layer; the composite film layer includes a pixel definition layer and a first film layer group, the first color light-emitting device is located in an opening of the pixel definition layer, and the first film layer group includes a first film layer arranged on the side wall of the opening of the pixel definition layer; the method includes: determining a target attenuation value of the first color light emitted by the first color light-emitting device according to the color deviation of the test display panel at a preset angle and the white balance requirement; changing the energy reflectivity of the composite film layer to the first color light in the target display panel, so that the attenuation value of the first color light emitted by the first color light-emitting device in the target display panel is the target attenuation value. In the present application, by changing the energy reflectivity of the composite film layer to the first color light in the target display panel, the target display panel can achieve white balance at a preset angle and improve the display effect.

Description

[Technical field]

[0001] The present application relates to the field of display technology, and in particular to a method for improving color deviation of a display panel, a display panel, and a display device. [Background technology]

[0002] Organic light-emitting diode (OLED) display panels have the advantages of low power consumption, self-luminescence, wide viewing angle, wide temperature characteristics and fast response speed, and are widely used in the market.

[0003] In existing OLED display panels, color shift often occurs at a wide viewing angle, affecting the normal display of the display panel. Therefore, in the field of display technology, a design to solve the color shift problem of OLED display panels is urgently needed.

[0004]

Application Contents

[0005] In view of this, embodiments of the present application provide a method for improving color deviation of a display panel, a display panel, and a display device.

[0006] In a first aspect, an embodiment of the present application provides a method for improving color deviation of a display panel, wherein the display panel includes a plurality of first color light emitting devices and a composite film layer; the composite film layer includes a pixel definition layer and a first film layer group, the pixel definition layer includes a plurality of openings, the first color light emitting devices are located in the openings, the first film layer group includes a first film layer, and the first film layer is disposed on a side wall of the pixel definition layer opening; the method includes:

[0007] Determine a target attenuation value of the first color light emitted by the first color light emitting device according to the color deviation of the test display panel at a preset angle and the white balance requirement;

[0008] The energy reflectivity of the composite film layer in the target display panel to the first color light is changed so that the attenuation value of the first color light emitted by the first color light emitting device in the target display panel is the target attenuation value.

[0009] In an implementation of the first aspect, changing the energy reflectivity of the composite film layer in the target display panel to the first color light includes:

[0010] Determining an initial attenuation value of the first color light emitted by the first color light emitting device according to the color deviation of the test display panel at a preset angle;

[0011] Determine an initial energy reflectivity of the composite film layer to the first color light according to the initial attenuation value, and determine a target energy reflectivity of the composite film layer to the first color light according to the target attenuation value;

[0012] The composite film layer in the target display panel is changed according to the target energy reflectivity and the initial energy reflectivity to change the energy reflectivity of the composite film layer in the target display panel to the first color light.

[0013] In an implementation of the first aspect, determining an initial energy reflectivity of the composite film layer to the first color light according to the initial attenuation value, and determining a target energy reflectivity of the composite film layer to the first color light according to the target attenuation value, includes:

[0014] When the target attenuation value is less than the initial attenuation value, the target energy reflectivity is set to be greater than the initial energy reflectivity;

[0015] When the target attenuation value is greater than the initial attenuation value, the target energy reflectivity is set to be less than the initial energy reflectivity.

[0016] In an implementation of the first aspect, when the target attenuation value is less than the initial attenuation value, setting the target energy reflectivity to be greater than the initial energy reflectivity includes: the percentage by which the target energy reflectivity increases relative to the initial energy reflectivity is the same as the percentage by which the target attenuation value decreases relative to the initial attenuation value;

[0017] When the target attenuation value is greater than the initial attenuation value, the target energy reflectivity is set to be less than the initial energy reflectivity, including: the percentage by which the target energy reflectivity decreases relative to the initial energy reflectivity is the same as the percentage by which the target attenuation value increases relative to the initial attenuation value.

[0018] In an implementation of the first aspect, changing the composite film layer in the target display panel according to the target energy reflectivity and the initial energy reflectivity includes:

[0019] A new first film layer is provided in the composite film layer of the target display panel according to the target energy reflectivity and the initial energy reflectivity, and the new first film layer is located between the pixel definition layer and the film layer where the first color light emitting device is located.

[0020] In an implementation of the first aspect, providing a new first film layer in the composite film layer of the target display panel according to the target energy reflectivity and the initial energy reflectivity includes:

[0021] The complex refractive index and thickness of the first film layer newly added in the composite film layer of the target display panel are determined according to the target energy reflectivity and the initial energy reflectivity.

[0022] In an implementation manner of the first aspect, the thickness of the newly added first film layer is D, where 10 nm≤D≤1000 nm.

[0023] In an implementation of the first aspect, changing the composite film layer in the target display panel according to the target energy reflectivity and the initial energy reflectivity includes:

[0024] The complex refractive index of the pixel definition layer in the target display panel is changed according to the target energy reflectivity and the initial energy reflectivity.

[0025] In an implementation of the first aspect, changing the composite film layer in the target display panel according to the target energy reflectivity and the initial energy reflectivity includes:

[0026] At least one of the thickness and the complex refractive index of the first film layer in the target display panel is changed according to the target energy reflectivity and the initial energy reflectivity.

[0027] In an implementation of the first aspect, the display panel further includes a second film layer, and the second film layer covers the first film layer group; changing the energy reflectivity of the composite film layer in the target display panel to the first color light includes:

[0028] The complex refractive index of the second film layer in the target display panel is changed to change the energy reflectivity of the composite film layer in the target display panel to the first color light.

[0029] In a second aspect, an embodiment of the present application provides a display panel, comprising a composite film layer obtained by the method provided in the first aspect.

[0030] In a third aspect, an embodiment of the present application provides a display device, comprising a display panel provided in the second aspect.

[0031] In an embodiment of the present application, a target attenuation value of the first color light at a preset angle can be determined according to the color cast of the test display panel at a preset angle and the white balance requirement. When the attenuation value of the first color light at the preset angle is the target attenuation value, the display panel reaches white balance at the preset angle. After determining the target attenuation value of the first color light at the preset angle, the energy reflectivity of the composite film layer of the display panel to the first color light is affected by the attenuation value of the first color light, and by changing the energy reflectivity of the composite film layer of the target display panel to the first color light, the attenuation value of the first color light emitted by the first color light emitting device in the target display panel at the preset angle is the target attenuation value, so that the target display panel reaches white balance at the preset angle, avoids the occurrence of color cast, and further improves the display effect of the display panel.

Brief Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1A schematic diagram of a partial structure of a display panel provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the structure of a first film layer group provided in an embodiment of the present application;

[0035] Figure 3 A flowchart of a method for improving color deviation of a display panel provided in an embodiment of the present application;

[0036] Figure 4 for Figure 3 A workflow diagram of step S2;

[0037] Figure 5 for Figure 4 A workflow diagram of step S22;

[0038] Figure 6 A schematic structural diagram of another first film layer group provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of a display panel provided in an embodiment of the present application;

[0040] Figure 8 A schematic diagram of a display device provided in an embodiment of the present application. [Specific implementation method]

[0041] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0042] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0043] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0044] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0045] In the description of this specification, it is necessary to understand that the words such as "substantially", "approximately", "approximately", "about", "roughly", "substantially" and the like described in the claims and embodiments of the present application refer to what can be generally recognized within a reasonable process operation range or tolerance range, rather than an exact value.

[0046] The applicant in this case has provided a solution to the problems existing in the prior art through careful and in-depth research.

[0047] Figure 1 A schematic diagram of a partial structure of a display panel provided in an embodiment of the present application is shown in FIG. Figure 2 A schematic diagram of the structure of a first film layer group provided in an embodiment of the present application, Figure 3 A flowchart of a method for improving color deviation of a display panel viewing angle provided in an embodiment of the present application.

[0048] The present invention provides a method for improving the color deviation of the display panel. Figure 1 and Figure 2 As shown, the display panel 100 includes a plurality of first color light emitting devices 10 and a composite film layer 20 . The composite film layer 20 includes a pixel definition layer 21 and a first film layer group 22 . The pixel definition layer 21 includes a plurality of openings 211 .

[0049] The first color light emitting device 10 is located in the opening 211 , and the first color light emitting device 10 can be one of a red light emitting device, a green light emitting device, and a blue light emitting device. The first film layer group 22 includes a first film layer 221 , and the first film layer 221 is disposed on the sidewall 211A of the opening 211 of the pixel definition layer 21 .

[0050] It should be noted that the first film layer group 22 may include multiple first film layers 221 , and the multiple first film layers 221 in the first film layer group 22 may be stacked on the sidewall 211A of the opening 211 in a direction Z pointing to the center of the opening 211 .

[0051] Furthermore, the first film layer 221 may be a film layer between the pixel definition layer 21 and the encapsulation layer.

[0052] Specifically, the first film layer 221 may be any one of the first color light emitting device layer 221A, the electrode layer 221B, the first light emitting auxiliary layer 221C, and the second light emitting auxiliary layer 221D. That is, along the direction Z from the sidewall 211A of the opening 211 to the center of the opening 211, the first film layer group 22 may include at least one of the first color light emitting device layer 221A, the electrode layer 221B, the first light emitting auxiliary layer 221C, and the second light emitting auxiliary layer 221D.

[0053] For example, Figure 2 As shown, along the direction Z from the side wall 211A of the opening 211 to the center of the opening 211 , the first film layer group 22 includes a first color light-emitting device layer 221A, an electrode layer 221B, a first light-emitting auxiliary layer 221C and a second light-emitting auxiliary layer 221D which are stacked.

[0054] It is understandable that the first film layer 221 can also be attached to the bottom surface of the opening 211, and the portion of the first color light emitting device layer 221A located on the bottom surface of the opening 211 is the first color light emitting device 10 that can emit light. The first color light emitted by the first color light emitting device 10 will be emitted to the physical portion of the first film layer group 22 and the pixel definition layer 21 attached to the side wall 211A of the opening 211. That is, the first color light emitted by the first color light emitting device 10 will be emitted to the composite film layer 20.

[0055] The inventor has found through research that the energy reflectivity of the composite film layer 20 to the first color light will affect the brightness of the light finally emitted by the first color light, that is, changing the energy reflectivity of the composite film layer 20 to the first color light can change the attenuation value of the first color light. Based on this characteristic, the inventor provides a method for improving the color deviation of the viewing angle of a display panel.

[0056] like Figure 3 As shown, the method provided in the embodiment of the present application includes:

[0057] Step S1: determining a target attenuation value of the first color light emitted by the first color light emitting device 10 according to the color shift condition of the test display panel at a preset angle and the white balance requirement.

[0058] Step S2: changing the energy emissivity of the composite film layer 20 in the target display panel to the first color light, so that the attenuation value of the first color light emitted by the first color light emitting device 10 in the target display panel is the target attenuation value.

[0059] The test display panel and the target display panel may both include: Figure 1 The display panel 100 shown includes a structure. The test display panel may be a display panel with large viewing angle color deviation in the prior art, and the target display panel may be a display panel with large viewing angle color deviation improved by the method provided in the embodiment of the present application.

[0060] It should be noted that the preset angle in step S1 may be a viewing angle when a user views the display panel.

[0061] In the embodiment of the present application, according to the color shift of the test display panel at a preset angle and the white balance requirement, the target attenuation value of the first color light at the preset angle can be determined. Wherein, when the attenuation value of the first color light at the preset angle is the target attenuation value, the display panel reaches white balance at the preset angle. After determining the target attenuation value of the first color light at the preset angle, the energy reflectivity of the composite film layer 20 to the first color light in the target display panel is changed by utilizing the influence of the energy reflectivity of the composite film layer 20 in the display panel on the attenuation value of the first color light, that is, the energy reflectivity of the composite film layer 20 to the first color light in the target display panel is set to be different from the energy reflectivity of the composite film layer 20 to the first color light in the test display panel, so that the attenuation value of the first color light emitted by the first color light emitting device 10 in the target display panel at the preset angle is the target attenuation value, so that the target display panel reaches white balance at the preset angle, avoids the occurrence of color shift, and then improves the display effect of the display panel.

[0062] In addition, the change of the energy reflectivity of the composite film layer 20 in the embodiment of the present application is highly targeted, and only the energy reflectivity of the composite film layer 20 to a specific first color light is changed, and the energy reflectivity of the composite film layer 20 to other color lights is not affected. That is, changing the energy reflectivity of the composite film layer 20 to the first color light mainly affects the attenuation value of the first color light, and has little effect on the attenuation values ​​of other color lights, which is conducive to improving the control ability of the display panel with large viewing angle color deviation.

[0063] Figure 4 for Figure 3 A workflow diagram of step S2 in FIG.

[0064] In one embodiment of the present application, Figure 3 and Figure 4 , changing the energy reflectivity of the composite film layer 20 in the target display panel to the first color light, including:

[0065] Step S21: determining an initial attenuation value of the first color light emitted by the first color light emitting device 10 according to the color deviation of the test display panel at a preset angle.

[0066] Step S22: determining the initial energy reflectivity of the composite film layer 20 to the first color light according to the initial attenuation value, and determining the target energy reflectivity of the composite film layer 20 to the first color light according to the target attenuation value.

[0067] Step S23: changing the composite film layer in the target display panel according to the target energy reflectivity and the initial energy reflectivity to change the energy reflectivity of the composite film layer 20 in the target display panel to the first color light.

[0068] Among them, the initial energy reflectivity of the composite film layer 20 to the first color light can be the energy reflectivity when the attenuation value of the first color light is the initial attenuation value, the target energy reflectivity of the composite film layer 20 to the first color light can be the energy reflectivity when the attenuation value of the first color light is the target attenuation value, and the initial attenuation value of the first color light can be the attenuation value of the first color light when the test display panel exhibits color deviation at a preset angle.

[0069] In the embodiment of the present application, according to the color deviation of the test display panel at a preset angle, the initial attenuation value of the first color light at the preset angle can be determined, and at this time, the energy reflectivity of the composite film layer 20 to the first color light is the initial energy reflectivity. According to the white balance requirement of the display panel at the preset angle, the target attenuation value of the first color light at the preset angle can be determined, and at this time, the energy reflectivity of the composite film layer 20 to the first color light is the target energy reflectivity, that is, when the energy reflectivity of the composite film layer 20 to the first color light in the target display panel is the target energy reflectivity, the target display panel reaches white balance at the preset angle. In order to make the energy reflectivity of the composite film layer 20 to the first color light in the target display panel the target energy reflectivity, the composite film layer 20 in the target display panel can be changed on the basis of the known initial energy reflectivity and the target energy reflectivity, that is, relative to the composite film layer 20 in the test display panel, the composite film layer 20 in the target display panel is changed to change the energy reflectivity of the composite film layer 20 in the target display panel to the first color light, so that the energy reflectivity of the composite film layer 20 in the target display panel to the first color light is the target energy reflectivity.

[0070] Since the composite film layer 20 in the test display panel is a prepared film layer, the thickness and complex refractive index of each film layer in the composite film layer 20 in the test display panel are known values, and the initial energy reflectivity of the composite film layer 20 to the first color light can be a known value. Therefore, when preparing the composite film layer 20 in the target display panel, the composite film layer 20 in the test display panel can be changed according to the initial energy reflectivity of the composite film layer 20 to the first color light and the target energy reflectivity, so that the energy reflectivity of the composite film layer 20 in the target display panel to the first color light is the target energy reflectivity, so that the attenuation value of the first color light at the preset angle is the target attenuation value, and then the target display panel reaches white balance at the preset angle.

[0071] Figure 5 for Figure 4 A workflow diagram of step S22 in FIG.

[0072] In one embodiment of the present application, Figure 4 and Figure 5In step S22, the initial energy reflectivity of the composite film layer 20 to the first color light is determined according to the initial attenuation value, and the target energy reflectivity of the composite film layer 20 to the first color light is determined according to the target attenuation value, including:

[0073] Step S221: When the target attenuation value is less than the initial attenuation value, the target energy reflectivity is set to be greater than the initial energy reflectivity.

[0074] Step S222: When the target attenuation value is greater than the initial attenuation value, the target energy reflectivity is set to be less than the initial energy reflectivity.

[0075] Further, in step S221, when the target attenuation value is less than the initial attenuation value, the target energy reflectivity is set to be greater than the initial energy reflectivity, including:

[0076] The percentage by which the target energy reflectivity increases relative to the initial energy reflectivity is the same as the percentage by which the target attenuation value decreases relative to the initial attenuation value.

[0077] In step S222, when the target attenuation value is greater than the initial attenuation value, the target energy reflectivity is set to be less than the initial energy reflectivity, including:

[0078] The percentage by which the target energy reflectivity decreases relative to the initial energy reflectivity is the same as the percentage by which the target attenuation value increases relative to the initial attenuation value.

[0079] It should be noted that there is no sequential relationship between step S221 and step S222. Step S221 and step S222 are a rule when executing step S22.

[0080] In the embodiment of the present application, when the target attenuation value of the first color light emitted by the first color light emitting device 10 at a preset angle is less than the initial attenuation value, that is, the light emitted by the first color light in the target display panel at a preset angle is more than the light emitted by the first color light in the test display panel at a preset angle, the target display panel needs to reduce the attenuation value of the first color light at a preset angle relative to the test display panel, and then the target energy reflectivity of the composite film layer 20 for the first color light needs to be set greater than the initial energy reflectivity, and further, the percentage of the increase of the target energy reflectivity relative to the initial energy reflectivity is the same as the percentage of the decrease of the target attenuation value relative to the initial attenuation value. The first color light in the target display panel can be reflected more by the composite film layer 20, so that the first color light in the target display panel emits more light at the preset angle, and then the target display panel achieves white balance at the preset angle, improving the display effect of the display panel.

[0081] When the target attenuation value of the first color light emitted by the first color light emitting device 10 at a preset angle is greater than the initial attenuation value, that is, the light emitted by the first color light in the target display panel at a preset angle is less than the light emitted by the first color light in the test display panel at a preset angle, the target display panel needs to increase the attenuation value of the first color light at a preset angle relative to the test display panel, and then the target energy reflectivity of the composite film layer 20 for the first color light needs to be set lower than the initial energy reflectivity. Furthermore, the percentage of the target energy reflectivity reduction relative to the initial energy reflectivity is the same as the percentage of the target attenuation value increase relative to the initial attenuation value. The first color light in the target display panel is reflected less by the composite film layer 20, so that the first color light in the target display panel emits less light at a preset angle, and then the target display panel achieves white balance at a preset angle, improving the display effect of the display panel.

[0082] Figure 6 A schematic structural diagram of another first film layer group provided in an embodiment of the present application.

[0083] In one embodiment of the present application, reference Figure 6 The structure of the first film layer group shown in Figure 4 In step S23, the composite film layer 20 in the target display panel is changed according to the target energy reflectivity and the initial energy reflectivity, including:

[0084] A new first film layer 222 is provided in the composite film layer of the target display panel according to the target energy reflectivity and the initial energy reflectivity. The new first film layer 222 is located between the pixel definition layer 21 and the film layer where the first color light emitting device 10 is located.

[0085] The film layer where the first color light emitting device 10 is located may be the first color light emitting device layer 221A. That is, the newly added first film layer 222 may be disposed on the sidewall 211A of the opening 211 and may be located between the substantial portion of the pixel definition layer 21 and the first color light emitting device layer 221A.

[0086] Further, a new first film layer 222 is provided in the composite film layer of the target display panel according to the target energy reflectivity and the initial energy reflectivity, including:

[0087] The complex refractive index and thickness of the newly added first film layer 222 in the composite film layer 20 of the target display panel are determined according to the target energy reflectivity and the initial energy reflectivity.

[0088] Optionally, the thickness of the newly added first film layer 222 is D, wherein 10 nm≤D≤1000 nm.

[0089] In the embodiment of the present application, a new first film layer 222 is set in the composite film layer 20 in the target display panel according to the target energy reflectivity and the initial energy reflectivity, and the energy reflectivity of the composite film layer 20 in the target display panel is changed, so that the energy reflectivity of the composite film layer 20 in the target display panel to the first color light is the target energy reflectivity, so that the attenuation rate of the first color light at a preset angle is the target attenuation rate, and the light output brightness of the first color light at the preset angle meets the requirements, thereby achieving the white balance of the target display panel at the preset angle.

[0090] Moreover, the purpose of setting the newly added first film layer 222 is mainly to determine the thickness D and complex refractive index of the newly added first film layer 222. Since the initial energy emissivity of the composite film layer 20 is a known value, and the target energy reflectivity has a certain corresponding relationship with the initial energy reflectivity, after the thickness D of the newly added first film layer 222 is set according to the film layer preparation process, the complex refractive index of the newly added first film layer 222 can be known, so that the newly added first film layer 222 that meets the requirements can be set in the composite film layer 20 of the target display panel.

[0091] Specifically, in the test display panel, the first film layer group 22 in the composite film layer 20 includes m first film layers, m≥1. According to the light transmission theory, the transmission matrix formula of the first color light passing through the composite film layer 20 can be (Formula 1):

[0092]

[0093] Among them, η j is the optical admittance of the first color light at the jth film layer, 1≤j≤m. It can be understood that the first color light includes a first directional light perpendicular to the incident surface and a second directional light parallel to the incident surface. The η of the first directional light is j =N j cosθ j ; Second directional light δ j is the phase difference between the first direction light and the second direction light at the jth film layer, δ j =2πN j d j cosθ j / λ. In addition, N j is the complex refractive index of the jth film layer, d j is the thickness of the jth film layer, θ j is the refraction angle of the first color light at the jth film layer, λ is the wavelength of the first color light, η p is the complex refractive index of the pixel definition layer 21, and i is an imaginary unit of the complex number.

[0094] It should be noted that the composite film layer 20 in the test display panel is a prepared film layer, and the thickness and complex refractive index of each film layer included therein are known values. After determining the wavelength λ of the first color light, according to (Formula 1), it can be concluded that C1 / B1 is a complex number with a determined value.

[0095] Furthermore, if Figure 1 As shown, the display panel 100 further includes a second film layer 30, and the second film layer 30 covers the first film layer group 22. The first color light passes through the second film layer 30 and enters the composite film layer 20. The complex refractive index of the second film layer 30 is η c Of course, in the test display panel, the complex refractive index η of the second film layer 30 is c A complex number that determines the value.

[0096] Optionally, the second film layer 30 is an encapsulation layer.

[0097] According to the light transmission theory, the initial energy reflectivity X1 of the composite film layer 20 can be obtained: The initial energy reflectivity X1 is a complex number having a fixed value.

[0098] In the target display panel, except for the newly added first film layer 222, other film layers may be the same as the film layers in the test display panel. Then, in the target display panel, the transmission matrix formula of the first color light passing through the composite film layer 20 may be (Formula 2):

[0099]

[0100] Wherein, η is the optical admittance of the first color light in the newly added first film layer 222, η of the first direction light = Ncosθ; N is the complex refractive index of the newly added first film layer 222, θ is the refraction angle of the first color light in the newly added first film layer 222. δ is the phase difference between the first direction light and the second direction light in the newly added first film layer 222, δ=2πNDcosθ / λ, and D is the thickness of the newly added first film layer 222. The meanings of other parameters are the same as those in (Formula 1).

[0101] From the above analysis, it can be seen that the composite film layer 20 in the test display panel is a prepared film layer, and the thickness and complex refractive index of each film layer included therein are known values. After determining the wavelength λ of the first color light, according to (Formula 2), it can be concluded that C2 / B2 is a complex function with parameters, where the parameters are the complex refractive index N and thickness D of the newly added first film layer 222.

[0102] According to the light transmission theory, the target energy reflectivity X2 of the composite film layer 20 in the target display panel can be obtained. The target energy reflectivity X2 is a complex function with parameters, wherein the parameters are the complex refractive index N and the thickness D of the newly added first film layer 222 .

[0103] Since the target energy reflectivity X2 of the composite film layer 20 has a certain corresponding relationship with the initial energy reflectivity X1 of the composite film layer 20, and the initial energy reflectivity X1 is a complex number with a certain value, after setting the thickness D of the newly added first film layer 222 according to the preparation process of the film layer, the complex refractive index of the newly added first film layer 222 can be obtained, so that the newly added first film layer 222 that meets the requirements can be set in the composite film layer 20 of the target display panel.

[0104] For example, the test shows that the panel has a color deviation at a viewing angle of 60°. According to the color deviation and white balance requirements, the reason is that the first color light decays too slowly at a viewing angle of 60°, and the brightness of the first color light at a viewing angle of 60° needs to be reduced by 20%, that is, the target attenuation value of the first color light is greater than the initial attenuation value, and the target attenuation value of the first color light increases by 20% relative to the initial attenuation value. To use the composite film layer 20 to regulate the brightness of the first color light at a viewing angle of 60°, the target energy reflectivity X2 of the composite film layer 20 needs to be less than the initial energy reflectivity X1, and the target energy reflectivity X2 needs to be reduced by 20% relative to the initial energy reflectivity X1, that is, X2=0.8*X1.

[0105] Since the initial energy reflectivity X1 is a complex number with a certain value, the value of the target energy reflectivity X2 with the complex refractive index N and thickness D of the newly added first film layer 222 as parameters can be solved. After the thickness D of the newly added first film layer 222 is set according to the film layer preparation process, the complex refractive index N of the newly added first film layer 222 can be solved, so that the newly added first film layer 222 with composite requirements is set in the composite film layer 20 of the target display panel, so that the energy reflectivity of the composite film layer 20 in the target display panel to the first color light is the target energy reflectivity, thereby reducing the light output brightness of the first color light at a 60° viewing angle by 20%, and achieving the white balance requirement of the target display panel at a 60° viewing angle.

[0106] For another example, the test shows that the panel has a color deviation at a viewing angle of 70°. According to the color deviation and white balance requirements, the reason is that the first color light decays too quickly at a viewing angle of 70°, and the brightness of the first color light at a viewing angle of 70° needs to be increased by 20%, that is, the target attenuation value of the first color light is less than the initial attenuation value, and the target attenuation value of the first color light is reduced by 20% relative to the initial attenuation value. To use the composite film layer 20 to control the brightness of the first color light at a viewing angle of 70°, the target energy reflectivity X2 of the composite film layer 20 needs to be greater than the initial energy reflectivity X1, and the target energy reflectivity X2 needs to be increased by 20% relative to the initial energy reflectivity X1, that is, X2=1.2*X1.

[0107] Since the initial energy reflectivity X1 is a complex number with a certain value, the value of the target energy reflectivity X2 with the complex refractive index N and thickness D of the newly added first film layer 222 as parameters can be solved. After the thickness D of the newly added first film layer 222 is set according to the film layer preparation process, the complex refractive index N of the newly added first film layer 222 can be solved, so that the newly added first film layer 222 with composite requirements is set in the composite film layer 20 of the target display panel, so that the energy reflectivity of the composite film layer 20 in the target display panel to the first color light is the target energy reflectivity, thereby increasing the light output brightness of the first color light at a viewing angle of 70° by 20%, and achieving the white balance requirement of the target display panel at a viewing angle of 70°.

[0108] In another embodiment of the present application, Figure 4 In step S23, the composite film layer 20 in the target display panel is changed according to the target energy reflectivity and the initial energy reflectivity, including:

[0109] The complex refractive index of the pixel definition layer 21 in the target display panel is changed according to the target energy reflectivity and the initial energy reflectivity.

[0110] It can be seen from the above (Formula 1) and (Formula 2) that the complex refractive index of the pixel definition layer 21 can affect the values ​​of C1 / B1 and C2 / B2, that is, the complex refractive index of the pixel definition layer 21 can affect the values ​​of the initial energy reflectivity X1 and the target energy reflectivity X2. In the embodiment of the present application, according to the known initial energy reflectivity X1 and the target energy reflectivity X2, the complex refractive index of the pixel definition layer 21 in the target display panel can be set to be different from the complex refractive index of the pixel definition layer 21 in the test display panel, so that the energy reflectivity of the composite film layer 20 in the target display panel is the target energy reflectivity, and the white balance requirement of the target display panel at a preset angle is achieved.

[0111] In another embodiment of the present application, Figure 4 In step S23, the composite film layer 20 in the target display panel is changed according to the target energy reflectivity and the initial energy reflectivity, including:

[0112] At least one of the thickness and the complex refractive index of the first film layer 221 in the target display panel is changed according to the target energy reflectivity and the initial energy reflectivity.

[0113] It can be seen from the above (Formula 1) and (Formula 2) that the thickness and complex refractive index of the first film layer 221 can affect the values ​​of C1 / B1 and C2 / B2, that is, the thickness and complex refractive index of the first film layer 221 can affect the values ​​of the initial energy reflectivity X1 and the target energy reflectivity X2. In the embodiment of the present application, according to the known initial energy reflectivity X1 and the target energy reflectivity X2, at least one of the thickness and complex refractive index of the first film layer 221 in the target display panel can be set to be different from the thickness and complex refractive index of the first film layer 221 in the test display panel, so that the energy reflectivity of the composite film layer 20 in the target display panel is the target energy reflectivity, and the white balance requirement of the target display panel at a preset angle is achieved.

[0114] It should be noted that changing the first film layer 221 in the target display panel according to the target energy reflectivity and the initial energy reflectivity may be changing only one first film layer 221 in the target display panel or simultaneously changing multiple first film layers 221 in the target display panel.

[0115] Furthermore, multiple embodiments of changing the composite film layer 20 in the target display panel according to the target energy reflectivity and the initial energy reflectivity can also be combined with each other, so that the energy reflectivity of the composite film layer 20 in the target display panel is finally made to be the target energy reflectivity, thereby achieving the white balance requirement of the target display panel at a preset angle.

[0116] Please continue to refer to Figure 1 In one embodiment of the present application, the display panel 100 further includes a second film layer 30 , and the second film layer 30 covers the first film layer group 22 . The first color light passes through the second film layer 30 and enters the composite film layer 20 .

[0117] Optionally, the second film layer 30 is an encapsulation layer.

[0118] Changing the energy reflectivity of the composite film layer 20 in the target display panel to the first color light includes:

[0119] The complex refractive index of the second film layer 30 in the target display panel is changed to change the energy reflectivity of the composite film layer 20 in the target display panel to the first color light.

[0120] From the formula of the initial energy reflectivity X1 and the target energy reflectivity X2, it can be known that the complex refractive index η of the second film layer 30 is cThe values ​​of the initial energy reflectivity X1 and the target energy reflectivity X2 can be affected. In the embodiment of the present application, according to the known initial energy reflectivity X1 and the target energy reflectivity X2, the complex refractive index of the second film layer 30 in the target display panel can be set to be different from the complex refractive index of the second film layer 30 in the test display panel, so that the energy reflectivity of the composite film layer 20 in the target display panel is the target energy reflectivity, and the white balance requirement of the target display panel at a preset angle is achieved.

[0121] Figure 7 A schematic diagram of a display panel provided in an embodiment of the present application.

[0122] The present application embodiment provides a display panel 100, such as Figure 7 As shown, the display panel 100 includes the composite film layer 20 obtained by the above method. That is, the display panel 100 provided in the embodiment of the present application can be the target display panel in the above embodiment. Figure 7 As shown, the display panel 100 further includes a substrate 40 , a transistor array layer 50 and a control electrode 60 . The control electrode 60 is used to control the first color light emitting device 10 to emit light. The pixel circuit in the transistor array layer 50 provides a control signal to the control electrode 60 .

[0123] In the display panel 100 provided in the embodiment of the present application, the energy reflectivity of the composite film layer 20 to the first color light is the target energy reflectivity, so that the attenuation value of the first color light at a preset angle can be the target attenuation value, thereby ensuring that the display panel 100 achieves white balance at the preset angle, avoiding the occurrence of color cast, and further improving the display effect of the display panel 100.

[0124] Figure 8 A schematic diagram of a display device provided in an embodiment of the present application.

[0125] The present application embodiment provides a display device 200, such as Figure 8 As shown, the display device 200 includes the display panel 100 provided in the above embodiment. The display device 200 provided in the embodiment of the present application may be a mobile phone, in addition, the display device 200 may also be an electronic device such as a computer or a television.

[0126] In the display device 200, the energy reflectivity of the composite film layer 20 to the first color light is the target energy reflectivity, so that the attenuation value of the first color light at a preset angle can be the target attenuation value, thereby ensuring that the display panel 100 achieves white balance at the preset angle, avoiding the occurrence of color cast, and further improving the display effect of the display panel 100.

[0127] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for improving the color deviation of a display panel, characterized in that: The display panel comprises: a plurality of first color light emitting devices; A composite film layer, the composite film layer comprising a pixel definition layer and a first film layer group; the pixel definition layer comprising a plurality of openings, the first color light emitting device being located in the openings; the first film layer group comprising a first film layer, and the first film layer being disposed on the sidewalls of the openings of the pixel definition layer; The method comprises: Determine a target attenuation value of the first color light emitted by the first color light emitting device according to the color deviation of the test display panel at a preset angle and the white balance requirement; Changing the energy reflectivity of the composite film layer in the target display panel to the first color light so that the attenuation value of the first color light emitted by the first color light emitting device in the target display panel is a target attenuation value; The step of changing the energy reflectivity of the composite film layer in the target display panel to the first color light comprises: Determining an initial attenuation value of the first color light emitted by the first color light emitting device according to the color deviation of the test display panel at a preset angle; Determine an initial energy reflectivity of the composite film layer to the first color light according to the initial attenuation value, and determine a target energy reflectivity of the composite film layer to the first color light according to the target attenuation value; Changing the composite film layer in the target display panel according to the target energy reflectivity and the initial energy reflectivity to change the energy reflectivity of the composite film layer in the target display panel to the first color light; The step of determining the initial energy reflectivity of the composite film layer to the first color light according to the initial attenuation value, and determining the target energy reflectivity of the composite film layer to the first color light according to the target attenuation value, comprises: When the target attenuation value is less than the initial attenuation value, setting the target energy reflectivity to be greater than the initial energy reflectivity; When the target attenuation value is greater than the initial attenuation value, the target energy reflectivity is set to be less than the initial energy reflectivity.

2. The method according to claim 1, characterized in that: When the target attenuation value is less than the initial attenuation value, setting the target energy reflectivity to be greater than the initial energy reflectivity comprises: the percentage by which the target energy reflectivity increases relative to the initial energy reflectivity is the same as the percentage by which the target attenuation value decreases relative to the initial attenuation value; When the target attenuation value is greater than the initial attenuation value, the target energy reflectivity is set to be less than the initial energy reflectivity, comprising: the percentage by which the target energy reflectivity is reduced relative to the initial energy reflectivity is the same as the percentage by which the target attenuation value is increased relative to the initial attenuation value.

3. The method according to claim 1, characterized in that: The step of changing the composite film layer in the target display panel according to the target energy reflectivity and the initial energy reflectivity comprises: A new first film layer is provided in the composite film layer of the target display panel according to the target energy reflectivity and the initial energy reflectivity, and the new first film layer is located between the pixel definition layer and the film layer where the first color light emitting device is located.

4. The method according to claim 3, characterized in that: The step of providing a new first film layer in the composite film layer of the target display panel according to the target energy reflectivity and the initial energy reflectivity includes: The complex refractive index and thickness of the newly added first film layer in the composite film layer of the target display panel are determined according to the target energy reflectivity and the initial energy reflectivity.

5. The method according to claim 4, characterized in that: The thickness of the newly added first film layer is D, wherein 10nm≤D≤1000nm.

6. The method according to claim 1, characterized in that: The step of changing the composite film layer in the target display panel according to the target energy reflectivity and the initial energy reflectivity comprises: The complex refractive index of the pixel definition layer in the target display panel is changed according to the target energy reflectivity and the initial energy reflectivity.

7. The method according to claim 1, characterized in that: The step of changing the composite film layer in the target display panel according to the target energy reflectivity and the initial energy reflectivity comprises: At least one of a thickness and a complex refractive index of the first film layer in a target display panel is changed according to the target energy reflectivity and the initial energy reflectivity.

8. The method according to claim 1, characterized in that: The display panel further includes a second film layer, wherein the second film layer covers the first film layer group; The step of changing the energy reflectivity of the composite film layer in the target display panel to the first color light comprises: The complex refractive index of the second film layer in the target display panel is changed to change the energy reflectivity of the composite film layer in the target display panel to the first color light.

9. A display panel, characterized in that: The composite membrane layer is obtained by the method according to any one of claims 1 to 8.

10. A display device, characterized in that: Comprising the display panel as claimed in claim 9.

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