OLED display panel with fpr liquid crystal phase difference compensation layer, preparation method thereof and optical application device

Abstract

The application provides an OLED display panel with an FPR liquid crystal phase difference compensation layer and a preparation method and an optical application device thereof, and comprises a polarized substrate, a phase compensation layer, a primer layer, and an RGB cholesteric liquid crystal layer; the polarized substrate comprises an upper TAC layer and a PVA layer which are connected in a stacked mode; the phase compensation layer comprises a lower TAC layer and an FPR type quarter phase delay layer; the primer layer is coated on the FPR type quarter phase delay layer; an included angle between a first optical axis of the FPR type quarter phase delay layer and an absorption axis of the polarized substrate ranges from 40 degrees to 50 degrees, and an included angle between a second optical axis of the FPR type quarter phase delay layer and the absorption axis of the polarized substrate ranges from -50 degrees to -40 degrees. The COE technology can be replaced, the thickness of the OLED display panel is reduced, the OLED display panel can be applied to a light emitting diode display device, and the OLED display panel has good anti-reflection and high transmission characteristics.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical elements, in particular to an OLED display panel with an FPR liquid crystal phase difference compensation layer and a preparation method thereof and an optical application device. BACKGROUND

[0002] Displayers are constantly developing towards the direction of beautiful display pictures, thin and small, power saving and ultra-thin flexible screens, and the market's requirements for display performance are also getting higher and higher, so display technology is constantly improving. At present, AMOLED COE (Color On Encapsulation) depolarization screen technology has emerged as the times require, and is hailed as the representative of the next generation of display technology. This technology makes corresponding color filters CF (Color Filter) in the corresponding area of the light-emitting pixel points of the OLED screen, and makes a black matrix BM (black matrix) in the pixel gap to prevent reflected light and improve transmittance. However, COE technology needs five masks to add BM, R / G / B color filters and O / C layer stack to achieve, and the process is relatively complex and the cost is relatively high.

[0003] In addition, since the circular polarizer is removed, the suppression of reflectivity after removing the polarizer becomes the focus. COE technology faces many challenges in achieving this goal and needs to be continuously optimized and improved.

[0004] In summary, in order to meet the high requirements of the market for the performance of the display, while reducing the cost and simplifying the process, it is of great practical significance and application value to develop a new type of OLED display panel that can replace COE technology. SUMMARY

[0005] The present application provides an OLED display panel with an FPR (Filmtype Patterned Retarder) liquid crystal phase difference compensation layer and a preparation method thereof and an optical application device, which aims at the problems in the prior art that COE depolarization screen technology can improve the display effect of OLED screen and reduce power consumption, but needs five masks to achieve, the process is complex and the cost is relatively high, and after removing the circular polarizer, the suppression of reflectivity becomes the focus, and COE technology faces many challenges in achieving this goal.

[0006] The core technology of the present application is to provide an OLED display panel comprising a polarizing substrate, a phase compensation layer with specific parameters, a Primer layer and an RGB cholesteric liquid crystal layer, which can replace COE technology, has excellent anti-reflection and anti-reflection characteristics, and has lower reflectivity, and only needs to be implemented through one mask, greatly simplifying the complex operation of the preparation process, and to a certain extent, plays a role in reducing costs and increasing efficiency.

[0007] In a first aspect, the present application provides an OLED display panel with an FPR liquid crystal phase difference compensation layer, comprising:

[0008] A polarized substrate, comprising an upper TAC layer and a PVA layer connected in a stacked manner;

[0009] A phase compensation layer, comprising a lower TAC layer, an FPR type quarter phase delay layer, and a positive C-plate viewing angle compensation film, the lower TAC layer having two opposite sides, one side away from the polarized substrate being coated with the positive C-plate viewing angle compensation film, and the other side being laminated with the FPR type quarter phase delay layer;

[0010] A primer layer coated on the FPR type quarter phase delay layer;

[0011] An RGB cholesteric liquid crystal layer, comprising R, G, and B cholesteric liquid crystal layers arranged in a stacked manner, the three layers being connected through a bonding adhesive layer, and the RGB cholesteric liquid crystal layer being coated with left-handed or right-handed cholesteric liquid crystal;

[0012] Wherein, the included angle between the first optical axis of the FPR type quarter phase delay layer and the absorption axis of the polarized substrate ranges from 40° to 50°, and the included angle between the second optical axis of the FPR type quarter phase delay layer and the absorption axis of the polarized substrate ranges from -50° to -40°.

[0013] Further, the polarized substrate, the phase compensation layer, and the RGB cholesteric liquid crystal layer are all laminated with the bonding adhesive layer.

[0014] Further, the phase compensation layer further comprises a positive C-plate viewing angle compensation film, and the positive C-plate viewing angle compensation film is coated on the side of the lower TAC layer away from the FPR type quarter phase delay layer.

[0015] Further, the planar phase difference value of the FPR type quarter phase delay layer is 110-170 nm.

[0016] Further, the wavelength bandwidth of the RGB cholesteric liquid crystal layer above the reflectivity of 70% is 10-80 nm.

[0017] Further, the complex vertical in-plane phase difference value of the phase compensation layer is -50 nm-50 nm.

[0018] Further, the central reflectivity wavelength range of the R cholesteric liquid crystal layer in the RGB cholesteric liquid crystal layer is 600-680 nm; the central reflectivity wavelength range of the G cholesteric liquid crystal layer is 500-580 nm; and the central reflectivity wavelength range of the B cholesteric liquid crystal layer is 400-480 nm.

[0019] Further, the FPR type quarter phase delay layer adopts any one of a liquid crystal type A plate reverse dispersion phase delay film, a liquid crystal type O plate reverse dispersion phase delay film or a liquid crystal type biaxial B plate reverse dispersion phase delay film.

[0020] In a second aspect, the present application provides a preparation method of the OLED display panel with the FPR liquid crystal phase difference compensation layer, which is used for preparing the phase compensation layer and includes the following steps:

[0021] A positive C-plate view angle compensation film is coated on a side of the lower TAC layer facing away from the polarizing base, a FPR type quarter phase delay layer is attached to a side of the lower TAC layer close to the polarizing base in sequence through a layer of adhesive, and a Primer layer is coated on the FPR type quarter phase delay layer.

[0022] In a third aspect, the present application provides an image display device including the OLED display panel with the FPR liquid crystal phase difference compensation layer.

[0023] Further, the image display device is a light emitting diode display.

[0024] The main contributions and innovations of the present application are as follows:

[0025] 1. The present application provides a new type of OLED display panel that can replace the COE technology, avoiding the complex process of the COE technology which requires five masks to achieve, and reducing the cost.

[0026] 2. The planar phase difference value of the FPR type quarter phase delay layer in the phase compensation layer is 110-170 nm, the included angle between the first optical axis and the absorption axis of the polarizing base ranges from 40° to 50°, the included angle between the second optical axis and the absorption axis of the polarizing base ranges from -50° to -40°, and the phase difference value increases with the increase of the wavelength, so that the phase compensation layer has good anti-reflection characteristics in the full light domain of the visible light wavelength range, has effective anti-reflection characteristics for eliminating light reflection at different viewing angles, can effectively eliminate the interference problem caused by the incidence of external light source to the organic light emitting diode display device, significantly reduces the reflectivity, and improves the display effect. The optional positive C-plate view angle compensation film in the phase compensation layer can provide additional phase difference to compensate for the phase difference change of the original liquid crystal layer at different angles as much as possible, offset different viewing angle differences, improve the uniformity of different viewing angles, and provide better visual experience for users.

[0027] 3. The unique grating structure of the FPR type quarter phase delay layer can make the reverse dispersion liquid crystal arrange different optical axis angles at different grating positions, and the specific optical axis angles are 45° and -45°, so that the OLED display panel has the transmission function of COE, and the anti-reflection performance is further improved.

[0028] 4. The RGB cholesteric liquid crystal layer comprises R, G and B cholesteric liquid crystal layers arranged in a stack, and the three layers are connected by a bonding adhesive layer and are formed by left-handed or right-handed cholesteric liquid crystal coating. The wavelength width of reflectivity of 70% or more is 10-80 nm (preferably 20-50 nm), wherein the central reflectivity wavelength range of the R cholesteric liquid crystal layer is 600-680 nm, the central reflectivity wavelength range of the G cholesteric liquid crystal layer is 500-580 nm, and the central reflectivity wavelength range of the B cholesteric liquid crystal layer is 400-480 nm. This design makes the RGB cholesteric liquid crystal layer have specific performance in reflecting and transmitting light, and can better meet the display requirements, improve the color reproduction degree and display quality.

[0029] 5. Meet the requirements of thinning and flexibility:

[0030] Reduce the thickness: the optimization design and bonding mode of each layer structure help to reduce the thickness of the OLED display panel, so that it is more in line with the development trend of small and thin display.

[0031] Suitable for flexible devices: suitable for flexible devices such as flexible mobile phones (folding mobile phones), with smaller bending radius, improving the comfort of user use.

[0032] In summary, the scheme described in the application has significant beneficial effects in display performance, anti-glare and anti-reflection, uniformity of viewing angle, and thinness and flexibility, and has obvious advantages compared with the prior art.

[0033] The details of one or more embodiments of the application are presented in the following drawings and description, so that other features, objects and advantages of the application are more apparent. BRIEF DESCRIPTION OF DRAWINGS

[0034] The drawings described herein are used to provide further understanding of the application, and form a part of the application. The schematic embodiments of the application and their descriptions are used to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0035] Figure 1 is a structure diagram of an OLED display panel with FPR type phase compensation film instead of COE technology according to an embodiment of the application;

[0036] Figure 2 is an FPR absorption axis angle distribution diagram according to an embodiment of the application;

[0037] Figure 3 is a schematic diagram according to an embodiment of the application;

[0038] Figure 4is a transmittance spectrum comparison curve diagram of the present application and the prior art COE technology according to an embodiment of the present application;

[0039] Figure 5 is a B reflectance comparison curve diagram of the present application and the prior art COE technology according to an embodiment of the present application;

[0040] Figure 6 is a G reflectance comparison curve diagram of the present application and the prior art COE technology according to an embodiment of the present application;

[0041] Figure 7 is an R reflectance comparison curve diagram of the present application and the prior art COE technology according to an embodiment of the present application.

[0042] In the figure, 100 is a polarized substrate; 101 is an upper TAC layer; 102 is a PVA layer; 200 is a phase compensation layer; 201 is a Primer layer; 202 is an FPR type quarter phase delay layer; 203 is a lower TAC layer; 204 is a positive C-plate viewing angle compensation film; 300 is an RGB cholesteric liquid crystal layer; 301 is an R cholesteric liquid crystal layer; 302 is a G cholesteric liquid crystal layer; 303 is a B cholesteric liquid crystal layer; and 400 is a bonding adhesive. DETAILED DESCRIPTION

[0043] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, unless otherwise indicated, like numbers in the attached drawings refer to the same or similar elements. The embodiments described in the following exemplary embodiments are not meant to represent all embodiments consistent with one or more embodiments of the present description. Rather, they are merely examples of apparatuses and methods consistent with some aspects of one or more embodiments of the present description as detailed in the appended claims.

[0044] It should be noted that the steps of the corresponding methods are not necessarily performed in the order shown and described in the present description in other embodiments. In some other embodiments, the steps included in the methods can be more or less than those described in the present description. In addition, a single step described in the present description can be divided into multiple steps for description in other embodiments, and multiple steps described in the present description can be combined into a single step for description in other embodiments.

[0045] The COE process requires five masks to realize the COE function, which is relatively complex and has a high cost.

[0046] Based on this, the present application solves the problems existing in the prior art based on an OLED display panel with an FPR liquid crystal phase difference compensation layer.

[0047] Embodiment one

[0048] The application provides an OLED display panel with an FPR liquid crystal phase difference compensation layer. Figure 1 , comprising:

[0049] A polarized substrate 100 comprising an upper TAC layer 101 and a PVA layer 102 connected in a stacked manner; a component for realizing a polarized mechanism, which converts natural light without polarity into polarized light.

[0050] A phase compensation layer 200 comprising a lower TAC layer 203 and an FPR type quarter phase delay layer 202 and a positive C-plate viewing angle compensation film 204, the lower TAC layer 203 has two oppositely arranged sides, one side away from the polarized substrate 100 is coated with the positive C-plate viewing angle compensation film 204, and the other side is laminated with the FPR type quarter phase delay layer 202.

[0051] The composite plane phase difference value of the FPR type quarter phase delay layer 202 is 100-170 nm, the included angle between the first optical axis of the FPR type quarter phase delay layer and the absorption axis of the polarized substrate 100 ranges from positive 40° to positive 50°, and the included angle between the second optical axis of the FPR type quarter phase delay layer and the absorption axis of the polarized substrate 100 ranges from negative 50° to negative 40°.

[0052] A primer layer 201 coated on the FPR type quarter phase delay layer 202.

[0053] An RGB cholesteric liquid crystal layer 300 comprising an R cholesteric liquid crystal layer 301, a G cholesteric liquid crystal layer 302 and a B cholesteric liquid crystal layer 303 arranged in a stacked manner, and the three layers are connected through a bonding adhesive layer, and the RGB cholesteric liquid crystal layer 300 is coated by left-handed or right-handed cholesteric liquid crystal.

[0054] The polarized substrate 100, the phase compensation layer 200 and the RGB cholesteric liquid crystal layer 300 are mutually laminated through the bonding adhesive layer.

[0055] In one embodiment of the application, the plane phase difference value of the phase compensation layer 200 is set to 120-160 nm. Preferably, the phase compensation layer 200 further comprises a positive C-plate viewing angle compensation film 204, and the positive C-plate viewing angle compensation film 204 is coated on the side of the lower TAC layer 203 away from the FPR type quarter phase delay layer 202. Therefore, the positive C-plate viewing angle compensation film 204 provides additional phase difference to compensate for the phase difference change of the original liquid crystal layer at different angles as much as possible, offset different viewing angle differences and improve the uniformity of different viewing angles.

[0056] In an embodiment provided by the present application, the complex in-plane phase difference value of the phase compensation layer 200 is -50-50 nm; preferably, the complex in-plane phase difference value of the phase compensation layer 200 is -40-40 nm.

[0057] Through the above layer structure setting and parameter range setting, the phase compensation layer 200 has the characteristic that the longer the wavelength, the greater the phase difference value, and thus the phase compensation layer 200 has good anti-reflection characteristics in the full light domain of the visible light wavelength range, and has effective anti-reflection characteristics for eliminating light reflection at different viewing angles in the full angle, thereby solving the problem of interference caused by external incident light source incident to the organic light-emitting diode display device.

[0058] The FPR type quarter phase delay layer 202 is an optical film capable of reversible conversion of linearly polarized light and circularly polarized light. In a specific application scenario, natural light is converted into linearly polarized light by using a linear polarizer, and the obtained linearly polarized light is reversibly converted with circularly polarized light by using the FPR type quarter phase delay layer 202. The circularly polarized light itself can be directionally converted in the process of being reflected by a reflecting surface, for example, left-handed circularly polarized light is converted into right-handed circularly polarized light in the process of being reflected by a reflecting surface, and right-handed circularly polarized light is converted into left-handed circularly polarized light in the process of being reflected by a reflecting surface.

[0059] In an embodiment provided by the present application, the phase compensation layer 200 is a liquid crystal reverse dispersion film; and the FPR type quarter phase delay layer 202 is a liquid crystal film with reverse dispersion characteristics. The positive C-plate viewing angle compensation film 204 is a liquid crystal film with in-plane phase difference characteristics.

[0060] In an embodiment provided by the present application, the FPR type quarter phase delay layer 202 adopts any one of a liquid crystal type A plate reverse dispersion phase delay film, a liquid crystal type O plate reverse dispersion phase delay film, or a liquid crystal type biaxial B plate reverse dispersion phase delay film. Therefore, the combined film can achieve reverse dispersion effect.

[0061] The phase compensation layer 200 has the characteristic that the longer the wavelength, the greater the phase difference value, so that the phase compensation layer 200 has good anti-reflection characteristics in the full light domain of the visible light wavelength range, thereby solving the problem of interference caused by external incident light source incident to the organic light-emitting diode display device. The FPR type quarter phase delay layer 202 in the phase compensation layer 200 has the FPR characteristic, that is, the unique grating structure thereof can make the reverse dispersion liquid crystal arrange different optical axis angles at different grating positions. The specific optical axis angles are 45° and -45°, for example. Figure 2That is, (black part optical axis + 45°, white part optical axis - 45°) or (black part optical axis - 45°, white part optical axis + 45°), the angle between the gratings is opposite. Thus, the OLED display panel has the transmission function of COE, and better anti-reflection performance than COE, with lower reflectivity.

[0062] In an embodiment provided by the present application, the RGB cholesteric liquid crystal layer 300 has a wavelength bandwidth of 10-80 nm at a reflectivity of 70% or above; preferably, the wavelength bandwidth is 20-50 nm.

[0063] In an embodiment provided by the present application, the central reflectivity wavelength range of the R cholesteric liquid crystal layer 301 in the RGB cholesteric liquid crystal layer 300 is 600-680 nm; the central reflectivity wavelength range of the G cholesteric liquid crystal layer 302 is 500-580 nm; and the central reflectivity wavelength range of the B cholesteric liquid crystal layer 303 is 400-480 nm.

[0064] As shown in FIG. 2, the first optical axis grating position of the FPR type quarter phase delay layer 202 is aligned with the pixel position. Figure 3

[0065] In the ① light path, the light emitted by the pixel point can be regarded as natural light. When the light passes through the RGB cholesteric liquid crystal layer 300, 50% of the light is converted into left circularly polarized light and is transmitted, and 50% of the light is converted into right circularly polarized light and is reflected back to the pixel point. After half-wave loss, the light is converted into left circularly polarized light and exits, and transmits through the RGB cholesteric liquid crystal layer 300. After passing through the first optical axis of the FPR type quarter phase delay layer 202 in the phase compensation layer 200, the light is converted into 0° linearly polarized light and exits from the polarizing base 100. At this time, the light emitted by the pixel point can be fully transmitted and will not be absorbed by more than half of the polarizer, thereby achieving the effects of brightening and reducing consumption.

[0066] ​The light of No. 2 light path passes through the polarized base 100, and the light transmitted thereby is converted into 0° linearly polarized light. When the angle between the first optical axis of the FPR type quarter phase delay layer 202 in the phase compensation layer 200 and the absorption axis of the polarized base 100 is negative 40°-negative 50°, the linearly polarized light passing through the phase compensation layer 200 is converted into left circularly polarized light. When the RGB cholesteric liquid crystal layer 300 is right cholesteric liquid crystal, the left circularly polarized light is transmitted through the RGB cholesteric liquid crystal layer 300 and is incident into the pixel point. After reflection, the originally left circularly polarized light is converted into right circularly polarized light due to the half-wave loss characteristic, and the right circularly polarized light is reflected by the RGB cholesteric liquid crystal layer 300 back into the pixel point and is subjected to half-wave loss again to form left circularly polarized light. The left circularly polarized light is transmitted through the RGB cholesteric liquid crystal layer 300, a part of the left circularly polarized light passes through the first optical axis of the FPR type quarter phase delay layer 202 in the phase compensation layer 200 and is converted into 0° linearly polarized light, and the other part of the left circularly polarized light passes through the second optical axis of the FPR type quarter phase delay layer 202 in the phase compensation layer 200 and is converted into 90° linearly polarized light which is absorbed by the polarized base 100, thereby achieving the effects of increasing screen brightness, reducing energy consumption and reducing reflection.

[0067] The light of No. 3 light path passes through the polarized base 100, and the light transmitted thereby is also converted into 0° linearly polarized light. When the angle between the second optical axis of the FPR type quarter phase delay layer 202 in the phase compensation layer 200 and the absorption axis of the polarized base 100 is positive 50°-positive 40°, the linearly polarized light passing through the phase compensation layer 200 is converted into right circularly polarized light. When the RGB cholesteric liquid crystal layer 300 is right cholesteric liquid crystal, the right circularly polarized light is reflected by the RGB cholesteric liquid crystal layer 300, a part of the right circularly polarized light passes through the first optical axis of the FPR type quarter phase delay layer 202 in the phase compensation layer 200 and is converted into 90° linearly polarized light which is absorbed by the polarized base 100, and the other part of the right circularly polarized light passes through the second optical axis of the FPR type quarter phase delay layer 202 in the phase compensation layer 200 and is converted into 0° linearly polarized light which is transmitted through the polarized base 100, thereby achieving the effects of transmission and reducing reflection.

[0068] Thus, the present application solves the problems existing in the prior art in the following manner:

[0069] 1. A new OLED display panel is provided, which comprises a polarized base 100, a phase compensation layer 200, a Primer layer 201 and an RGB cholesteric liquid crystal layer 300. Thus, the OLED display panel has the transmission function of COE and better anti-reflection performance than COE, has lower reflectivity, and can replace the COE technology.

[0070] 2. The phase compensation layer 200 has the characteristic of FPR, which can make the reverse dispersion liquid crystal arrange different absorption axis angles at different grating positions. Specifically, the optical axis angle is 45° and -45°, so that the OLED display panel has the transmission function of COE, and better anti-reflection performance than COE, and lower reflectivity.

[0071] 3. The phase compensation layer 200 has the characteristic that the longer the wavelength, the greater the phase difference value. It has good anti-reflection characteristics in the full light domain of the visible light wavelength range, and has effective anti-reflection characteristics of eliminating light reflection at different viewing angles in the full angle range. It can eliminate the problem of interference caused by external incident light source incident to the organic light emitting diode display device.

[0072] 4. The RGB cholesteric liquid crystal layer 300 further enhances the performance of the OLED display panel, such as the specific central reflectivity wavelength range and wavelength bandwidth.

[0073] Through the above innovative layer structure and parameter setting, the OLED display panel of the present application can meet the market demand in performance, and at the same time avoid the problem of complex COE process and high cost. The overall advantages are high polarization and high transmittance, and the polarization of the stretched polarizing sheet is 99.99%, and the thickness is 90-110 μm.

[0074] Comparison of reflectivity with existing COE technology, as shown in the following table:

[0075] Table 1

[0076]

[0077] Table 2

[0078]

[0079] As Figures 4-7 As shown in Table 1 and Table 2, it can be seen that the transmittance of the present application (FPR type phase difference film) is better than COE in the full wave band, and the reflectivity is not much different in the central wavelength, which can be replaced by COE in a simpler process and lower cost.

[0080] Example two

[0081] Based on the same idea, the present application provides a preparation method for preparing the OLED display panel with the FPR liquid crystal phase difference compensation layer of Example 1. The preparation method is used to prepare the polarizing substrate 100, which includes the following steps:

[0082] A positive C-plate viewing angle compensation film 204 is coated on the side of the lower TAC layer 203 facing away from the polarizing substrate 100, and a FPR type quarter phase retardation layer 202 is attached on the side of the lower TAC layer 203 close to the polarizing substrate 100 in sequence via a layer of adhesive 400, and then a Primer layer 201 is coated on the FPR type quarter phase retardation layer 202.

[0083] Example Three

[0084] The present application also provides an optical application device comprising the OLED display panel in the above example one. The optical application device comprising the cholesteric liquid crystal brightness enhancement film and the OLED display panel in the above example one can be applied in a device with the OLED display panel to improve the overall light enhancement efficiency and reduce the problem of large viewing angle difference and natural light reflection.

[0085] The light emitting diode includes an organic light emitting diode (OLED) and a quantum dot light emitting diode (QLED). The device displayed by the organic light emitting diode can be a bracelet, a foldable mobile phone, a VR device, etc.

[0086] Those skilled in the art should understand that each technical feature of the above examples can be combined arbitrarily, and in order to make the description concise, each technical feature in the above examples is not described in all possible combinations, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0087] The above examples only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of variations and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An OLED display panel with FPR liquid crystal phase difference compensation layer, characterized in that, include: The polarizing substrate includes an upper TAC layer and a PVA layer that are stacked and connected to each other; The phase compensation layer includes a lower TAC layer, an FPR-type quarter-phase delay layer, and a positive C-plate viewing angle compensation film. The lower TAC layer has two oppositely arranged sides. The side facing away from the polarizing substrate is coated with the positive C-plate viewing angle compensation film, and the other side is laminated with the FPR-type quarter-phase delay layer. A primer layer is coated on the FPR-type quarter-phase delay layer; The RGB cholesteric liquid crystal layer includes stacked R, G, and B cholesteric liquid crystal layers connected by an adhesive layer. The RGB cholesteric liquid crystal layer is coated with either left- or right-handed cholesteric liquid crystal. The angle between the first optical axis of the FPR-type quarter-phase retardation layer and the absorption axis of the polarizing substrate ranges from [40°, 50°], and the angle between the second optical axis of the FPR-type quarter-phase retardation layer and the absorption axis of the polarizing substrate ranges from [-50°, -40°]. The light transmission position of the FPR-type quarter-phase retardation layer is aligned with the position of each RGB pixel, including a first angle of 45° and a second angle of -45°. The planar phase difference value of the FPR-type quarter-phase retardation layer is 110-170nm. The central reflectance wavelength range of the R cholesteric liquid crystal layer in the RGB cholesteric liquid crystal layer is 600-680nm; the central reflectance wavelength range of the G cholesteric liquid crystal layer is 500-580nm; the central reflectance wavelength range of the B cholesteric liquid crystal layer is 400-480nm; and the wavelength bandwidth of the RGB cholesteric liquid crystal layer with a reflectance of 70% or higher is 10-80nm. 2.The OLED display panel with FPR liquid crystal phase difference compensation layer of claim 1, wherein, The polarizing substrate, the phase compensation layer, and the RGB cholesteric liquid crystal layer are all laminated together with an adhesive layer. 3.The OLED display panel with FPR liquid crystal phase difference compensation layer of claim 1, wherein, The phase difference in the composite vertical plane of the phase compensation layer is -50nm to 50nm.

4. The OLED display panel with FPR liquid crystal phase difference compensation layer according to any one of claims 1-3, characterized in that, The FPR-type quarter-phase retardation layer is any one of the following: liquid crystal A-plate inverse dispersion phase retardation film, liquid crystal O-plate inverse dispersion phase retardation film, or liquid crystal biaxial B-plate inverse dispersion phase retardation film.

5. A method for preparing the OLED display panel with FPR liquid crystal phase difference compensation layer according to any one of claims 1-4, the method is used for preparing the phase compensation layer, characterized in that, Includes the following steps: A positive C-plate viewing angle compensation film is coated on the side of the lower TAC layer away from the polarizing substrate. An adhesive layer and an FPR-type quarter-phase retardation layer are sequentially laminated on the side of the lower TAC layer close to the polarizing substrate. Then, a primer layer is coated on the FPR-type quarter-phase retardation layer.

6. An optical application device characterized by: The OLED display panel with an FPR liquid crystal phase difference compensation layer as described in any one of claims 1-4.

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