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

Abstract

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

Description

Technical Field

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

[0002] Displays are constantly developing in the direction of exquisite display images, light and thin, power-saving and ultra-thin flexible screens. 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) depolarizer screen technology has come into being and is hailed as the representative of the next generation of display technology. This technology makes color filters CF (Color Filter) of corresponding colors in the corresponding areas of the luminous pixels of the OLED screen, and makes black matrices BM (black matrix) between pixels to prevent reflected light and improve transmittance. However, COE technology requires five masks to add BM, R / G / B color filters and O / C layer stacking, which is a relatively complex process and has a high cost.

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

[0004] In summary, in order to meet the market's high requirements for display performance while reducing costs and simplifying processes, developing a new OLED display panel that can replace COE technology has important practical significance and application value. Summary of the invention

[0005] The embodiment of the present invention provides an OLED display panel with a FPR (Filmtype Patterned Retarder) liquid crystal phase difference compensation layer, a preparation method thereof, and an optical application device. Although the COE depolarizer screen technology existing in the current technology can improve the display effect of the OLED screen and reduce power consumption, it requires five masks to achieve, the process is complex and the cost is high, and the reflectivity is suppressed after removing the circular polarizer. The COE technology faces many challenges and other problems in achieving this goal.

[0006] The core technology of the present invention is mainly to provide an OLED display panel including a polarizing substrate, a phase compensation layer with specific parameters, a Primer layer and an RGB cholesteric liquid crystal layer. The OLED display panel can replace the COE technology, has excellent anti-glare and anti-reflection properties, and has lower reflectivity. At the same time, it can be achieved by only passing through one mask, which greatly simplifies the complex operations in the preparation process and plays a role in reducing costs and increasing efficiency to a certain extent.

[0007] In a first aspect, the present invention provides an OLED display panel with a FPR liquid crystal phase difference compensation layer, comprising: A polarizing substrate, comprising an upper TAC layer and a PVA layer which are laminated and connected to each other; The phase compensation layer includes a lower TAC layer and an FPR type quarter phase delay layer, wherein the lower TAC layer has two oppositely disposed sides, one side is connected to the PVA layer, and the other side is laminated and bonded to the FPR type quarter phase delay layer; Primer layer, coated on the FPR type quarter phase delay layer; The RGB cholesteric liquid crystal layer comprises R, G, and B cholesteric liquid crystal layers which are stacked and connected by a bonding adhesive layer. The RGB cholesteric liquid crystal layer is formed by coating left-handed or right-handed cholesteric liquid crystal. Among them, the angle range between the first optical axis of the FPR type quarter phase delay layer and the absorption axis of the polarizing substrate is [40°, 50°], and the angle range between the second optical axis of the FPR type quarter phase delay layer and the absorption axis of the polarizing substrate is [-50°, -40°].

[0008] Furthermore, the polarizing substrate, the phase compensation layer and the RGB cholesteric liquid crystal layer are laminated to each other using a bonding adhesive layer.

[0009] Furthermore, the phase compensation layer further comprises a positive C-plate viewing angle compensation film, which is coated on a side of the lower TAC layer away from the coated FPR type quarter phase delay layer.

[0010] Furthermore, the plane phase difference of the FPR type quarter phase delay layer is 110-170nm.

[0011] Furthermore, the wavelength bandwidth of the RGB cholesteric liquid crystal layer at a reflectivity of more than 70% is 10-80nm.

[0012] Furthermore, the phase difference value in the composite vertical plane of the phase compensation layer is -50nm-50nm.

[0013] 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.

[0014] Furthermore, the FPR type quarter phase retardation layer adopts any one of a liquid crystal type A plate reverse dispersion phase retardation film, a liquid crystal type O plate reverse dispersion phase retardation film or a liquid crystal type biaxial B plate reverse dispersion phase retardation film.

[0015] In a second aspect, the present invention provides a method for preparing the above-mentioned OLED display panel with a FPR liquid crystal phase difference compensation layer, the preparation method is used to prepare the phase compensation layer, comprising the following steps: A positive C-plate viewing angle compensation film is coated on the side of the lower TAC layer facing away from the polarizing substrate, a bonding adhesive layer and an FPR type quarter phase delay layer are sequentially laminated on the side of the lower TAC layer close to the polarizing substrate, and then a Primer layer is coated on the FPR type quarter phase delay layer.

[0016] In a third aspect, the present invention provides an image display device, comprising the above-mentioned OLED display panel with the FPR liquid crystal phase difference compensation layer.

[0017] Furthermore, the image display device is a light emitting diode display.

[0018] The main contributions and innovations of the present invention are as follows: 1. The present invention provides a new OLED display panel that can replace the COE technology, avoiding the complex process of the COE technology that requires five masks to be implemented, and reducing costs.

[0019] 2. The plane phase difference of the FPR type quarter phase delay layer in the phase compensation layer is 110-170nm, the angle range between the first optical axis and the absorption axis of the polarizing matrix is ​​[40°, 50°], and the angle range between the second optical axis and the absorption axis of the polarizing matrix is ​​[-50°, -40°]. The longer the wavelength, the greater the phase difference. This makes the phase compensation layer have good anti-reflective properties in the visible light wavelength range of the full optical domain, and has anti-reflective properties that effectively eliminate light reflection at different viewing angles at all angles. It can effectively eliminate the interference problem caused by the external incident light source incident on the organic light emitting diode display device, significantly reduce the reflectivity, and improve the display effect. The optional positive C-plate viewing angle compensation film in the phase compensation layer can provide additional phase difference to supplement the phase difference change of the original liquid crystal layer at different angles as much as possible, offset the color difference of different viewing angles, and improve the uniformity of different viewing angles, providing users with a better visual experience.

[0020] 3. The unique grating structure of the FPR type quarter phase delay layer allows the inverse dispersed liquid crystal to arrange different optical axis angles at different grating positions. The specific optical axis angles are 45° and -45°, which enables the OLED display panel to have the transmission function of COE and further improves the anti-reflection performance.

[0021] 4. The RGB cholesteric liquid crystal layer includes R, G, and B cholesteric liquid crystal layers arranged in a stacked manner. The three layers are connected by a bonding adhesive layer and are coated with left-handed or right-handed cholesteric liquid crystals. The wavelength bandwidth at a reflectivity of more than 70% is 10-80nm (preferably 20-50nm), of which the central reflectivity wavelength range of the R cholesteric liquid crystal layer is 600-680nm, the central reflectivity wavelength range of the G cholesteric liquid crystal layer is 500-580nm, and the central reflectivity wavelength range of the B cholesteric liquid crystal layer is 400-480nm. This design enables the RGB cholesteric liquid crystal layer to have specific properties in terms of reflected and transmitted light, which can better meet display requirements and improve color reproduction and display quality.

[0022] 5. Meet the requirements of thinness and flexibility: Reduce thickness: The optimized design and bonding method of each layer structure can help reduce the thickness of OLED display panels, making them more in line with the development trend of thin and light displays.

[0023] Suitable for flexible devices: It can be applied to flexible devices such as flexible mobile phones (folding mobile phones), with a smaller bending radius, which improves the comfort of users.

[0024] In summary, the solution described in the present invention has significant beneficial effects in terms of display performance, anti-glare and anti-reflection, uniformity of viewing angle, and thinness and flexibility, and has obvious advantages over the prior art.

[0025] The details of one or more embodiments of the invention are set forth in the following drawings and description so that other features, objects, and advantages of the invention are more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 is a structural diagram of an OLED display panel with an FPR-type phase compensation film that can replace COE technology according to an embodiment of the present invention; Figure 2 is a FPR absorption axis angle distribution diagram according to an embodiment of the present invention; Figure 3 is a schematic diagram according to an embodiment of the present invention; Figure 4 is a comparison curve of light transmittance spectra of the present invention according to an embodiment of the present invention and the existing COE technology; Figure 5 is a B reflectivity comparison curve diagram of the present invention according to an embodiment of the present invention and the existing COE technology; Figure 6is a G reflectivity comparison curve diagram of the present invention according to an embodiment of the present invention and the existing COE technology; Figure 7 3 is a comparison curve of R reflectivity between the present invention according to an embodiment of the present invention and the existing COE technology.

[0027] In the figure, 100, polarizing substrate; 101, upper TAC layer; 102, PVA layer; 200, phase compensation layer; 201, Primer layer; 202, FPR type quarter phase delay layer; 203, lower TAC layer; 204, positive C-plate viewing angle compensation film; 300, RGB cholesteric liquid crystal layer; 301, R cholesteric liquid crystal layer; 302, G cholesteric liquid crystal layer; 303, B cholesteric liquid crystal layer; 400, bonding adhesive. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with one or more embodiments of this specification. Instead, they are merely examples of devices and methods consistent with some aspects of one or more embodiments of this specification as detailed in the appended claims.

[0029] It should be noted that: in other embodiments, the steps of the corresponding method are not necessarily performed in the order shown and described in this specification. In some other embodiments, the steps included in the method may be more or less than those described in this specification. In addition, a single step described in this specification may be decomposed into multiple steps for description in other embodiments; and multiple steps described in this specification may be combined into a single step for description in other embodiments.

[0030] The COE process requires five photomasks to achieve the COE function, which is relatively complex and costly.

[0031] Based on this, the present invention solves the problems existing in the prior art based on an OLED display panel with a FPR liquid crystal phase difference compensation layer.

[0032] Embodiment 1 The present invention aims to provide an OLED display panel with a FPR liquid crystal phase difference compensation layer, specifically, referring to Figure 1 ,include: The polarizing substrate 100 includes an upper TAC layer 101 and a PVA layer 102 which are stacked and connected to each other; components for realizing a polarizing mechanism, so that natural light without polarization is polarized and converted into polarized light.

[0033] The phase compensation layer 200 includes a lower TAC layer 203 and an FPR type quarter phase delay layer 202. The lower TAC layer 203 has two oppositely disposed surfaces, one surface is connected to the PVA layer 102, and the other surface is laminated with the FPR type quarter phase delay layer 202. Among them, the composite plane phase difference value of the FPR type quarter phase delay layer 202 is 100-170nm, the angle range between the first optical axis of the FPR type quarter phase delay layer and the absorption axis of the polarizing substrate 100 is positive 40°-positive 50°, and the angle range between the second optical axis of the FPR type quarter phase delay layer and the absorption axis of the polarizing substrate 100 is negative 50°-negative 40°.

[0034] Primer layer 201, coated on the FPR type quarter phase delay layer 202; The RGB cholesteric liquid crystal layer 300 includes a stacked R cholesteric liquid crystal layer 301, a G cholesteric liquid crystal layer 302, and a B cholesteric liquid crystal layer 303. The three layers are connected by a bonding adhesive layer. The RGB cholesteric liquid crystal layer 300 is coated with left-handed or right-handed cholesteric liquid crystal.

[0035] The polarizing substrate 100 , the phase compensation layer 200 and the RGB cholesteric liquid crystal layer 300 are laminated to each other using a laminating adhesive layer.

[0036] In one embodiment provided by the present invention, the plane phase difference value of the phase compensation layer 200 is set to 120-160nm. Preferably, the phase compensation layer 200 also includes a positive C-plate viewing angle compensation film 204, which is coated on the side of the lower TAC layer 203 away from the coated FPR type quarter phase delay layer 202. Therefore, the positive C-plate viewing angle compensation film 204 provides additional phase difference to supplement the phase difference change of the original liquid crystal layer at different angles as much as possible, offset the color difference of different viewing angles, and improve the uniformity of different viewing angles.

[0037] In an embodiment provided by the present invention, the phase difference value of the phase compensation layer 200 in the composite vertical plane is -50-50nm; preferably, the phase difference value of the phase compensation layer 200 in the composite vertical plane is -40-40nm.

[0038] Through the above-mentioned layer structure setting and parameter range setting, the phase compensation layer 200 has the characteristic that the longer the wavelength, the larger the phase difference value, so that the phase compensation layer 200 has good anti-reflection properties in the visible light wavelength range of the full light range, and has anti-reflection properties that can effectively eliminate light reflection at different viewing angles at all angles, and is used to eliminate the problem of interference caused by external incident light sources entering the organic light emitting diode display device in the full light range and at all angles.

[0039] Among them, the FPR type quarter phase delay layer 202 is an optical film that can reversibly convert linear polarized light and circular polarized light. In a specific application scenario, a linear polarizer is used to convert natural light into linear polarized light, and the FPR type quarter phase delay layer 202 is used to reversibly convert the obtained linear polarized light into circular polarized light. The circular polarized light itself can be converted in direction when it is reflected by the reflection surface. For example, left-handed circularly polarized light is converted into right-handed circularly polarized light when it is reflected by the reflection surface, and right-handed circularly polarized light is converted into left-handed circularly polarized light when it is reflected by the reflection surface.

[0040] In one embodiment of the present invention, the phase compensation layer 200 is a liquid crystal reverse dispersion film, the FPR type quarter phase delay layer 202 is a liquid crystal film with reverse dispersion characteristics, and the positive C-plate viewing angle compensation film 204 is a liquid crystal film with vertical in-plane phase difference characteristics.

[0041] In one embodiment provided by the present invention, the FPR type quarter phase delay layer 202 adopts any one of the liquid crystal type A plate reverse dispersion phase delay film, the liquid crystal type O plate reverse dispersion phase delay film or the liquid crystal type biaxial B plate reverse dispersion phase delay film. Therefore, the composite film formed after the combination can achieve the reverse dispersion effect.

[0042] 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 properties in the visible light wavelength range of the full light domain, which is used to eliminate the problem of interference caused by external incident light sources incident on the organic light emitting diode display device in the full light domain. The FPR type quarter phase delay layer 202 in the phase compensation layer 200 has the characteristics of FPR, that is, its unique grating structure can make the reverse dispersed liquid crystal arrange different optical axis angles at different grating positions, and the specific optical axis angles are 45° and -45°, such as Figure 2 , that is (black part optical axis +45°, white part optical axis -45°) or (black part optical axis -45°, white part optical axis +45°), the angles between the gratings are opposite. As a result, the OLED display panel has the transmission function of COE, as well as better anti-reflection performance than COE, and has lower reflectivity.

[0043] In one embodiment of the present invention, the wavelength bandwidth of the RGB cholesteric liquid crystal layer 300 at a reflectivity of more than 70% is 10-80 nm; preferably, the wavelength bandwidth is 20-50 nm.

[0044] In one embodiment of the present invention, the central reflectivity wavelength range of the R cholesteric liquid crystal layer 301 in the RGB cholesteric liquid crystal layer 300 is 600-680nm; the central reflectivity wavelength range of the G cholesteric liquid crystal layer 302 is 500-580nm; and the central reflectivity wavelength range of the B cholesteric liquid crystal layer 303 is 400-480nm.

[0045] like Figure 3 As shown, the first optical axis grating position of the FPR type quarter phase delay layer 202 is aligned with the pixel point position.

[0046] In the optical path ①, the light emitted by the pixel can be regarded as natural light. When passing through the RGB cholesteric liquid crystal layer 300, 50% of the light will be converted into left-handed circularly polarized light and transmitted, and 50% of the light will be converted into right-handed circularly polarized light and reflected back to the pixel. After half-wave loss, it will be converted into left-handed circularly polarized light and emitted 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, it is converted into 0° linear polarized light and emitted from the polarizing substrate 100. At this time, the light emitted by the pixel can achieve full transmission and will not be absorbed by more than half of the polarizer, thereby achieving the effect of brightening and reducing consumption.

[0047] In optical path ②, the external light passes through the polarizing substrate 100, and the transmitted light is converted into 0° linear 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 polarizing substrate 100 is negative 40°-negative 50°, the linear polarized light passing through the phase compensation layer 200 will be converted into left-handed circularly polarized light. When the RGB cholesteric liquid crystal layer 300 is a right-handed cholesteric liquid crystal, its left-handed circularly polarized light will pass through the RGB cholesteric liquid crystal layer 300 and be incident on the pixel point. After reflection, the original left-handed circularly polarized light will be converted into right-handed circularly polarized light due to the half-wave loss characteristic and emitted. The RGB cholesteric liquid crystal layer 300 will reflect the right-handed circularly polarized light back to the pixel point and undergo half-wave loss again to form left-handed circularly polarized light emission. After passing through the RGB cholesteric liquid crystal layer 300, a part of it passes through the first optical axis of the FPR-type quarter phase delay layer 202 in the phase compensation layer 200 and is reconverted into 0° linear polarized light and emitted from the polarizing substrate 100, and a part of it 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° linear polarized light and absorbed by the polarizing substrate 100, thereby achieving the effects of increasing screen brightness, reducing energy consumption and reducing reflection.

[0048] In the optical path ③, the external light passes through the polarizing substrate 100, and the light transmitted therethrough is also converted into 0° linear polarization. When the angle between the second optical axis of the FPR-type quarter phase retardation layer 202 in the phase compensation layer 200 and the absorption axis of the polarizing substrate 100 is positive 50°-positive 40°, the linear polarization passing through the phase compensation layer 200 will be converted into right-handed circular polarization. When the RGB cholesteric liquid crystal layer 300 is right-handed cholesteric liquid crystal, its right-handed circular polarization will be reflected by the RGB cholesteric liquid crystal layer 300, a part of which passes through the first optical axis of the FPR-type quarter phase retardation layer 202 in the phase compensation layer 200 and is converted into 90° linear polarization, which is absorbed by the polarizing substrate 100, and a part of which passes through the second optical axis of the FPR-type quarter phase retardation layer 202 in the phase compensation layer 200 and is converted into 0° linear polarization, which is emitted from the polarizing substrate 100, achieving the effect of transmission and reducing reflection.

[0049] Thus, the present invention solves the problems existing in the prior art in the following ways: 1. A new OLED display panel is provided, including a polarizing substrate 100, a phase compensation layer 200, a Primer layer 201 and an RGB cholesteric liquid crystal layer 300, whereby the OLED display panel has the transmission function of COE, as well as better anti-reflection performance than COE, and has a lower reflectivity, so as to replace the COE technology.

[0050] 2. The phase compensation layer 200 has the characteristics of FPR, which can make the reverse dispersed liquid crystal arrange different absorption axis angles at different grating positions. The specific optical axis angles are 45° and -45°, so that the OLED display panel has the transmission function of COE, as well as better anti-reflection performance than COE and lower reflectivity.

[0051] 3. The phase compensation layer 200 has the characteristic that the longer the wavelength, the greater the phase difference. It has good anti-reflection properties in the visible light wavelength range of the entire optical domain, and has anti-reflection properties that can effectively eliminate light reflection at different viewing angles at all angles, and can eliminate the problem of interference caused by external incident light sources incident on the organic light emitting diode display device.

[0052] 4. The configuration of the RGB cholesteric liquid crystal layer 300 further enhances the performance of the OLED display panel, such as a specific central reflectivity wavelength range and wavelength bandwidth.

[0053] Through the above innovative layer structure and parameter settings, the OLED display panel of the present invention can meet market demand in terms of performance, while avoiding the problems of complex COE process and high cost. The overall advantages are high polarization degree and high transmittance. The polarization degree of the stretched polarizer is 99.99% and the thickness is 90-110μm.

[0054] The reflectivity comparison with the existing COE technology is shown in the following table: Table 1

[0055] Table 2

[0056] like Figure 4-Figure 7 As shown in Tables 1 and 2, it can be seen that the transmittance of the present invention (FPR type phase difference film) is better than that of COE in all wavelength bands, and the reflectivity thereof is not much different at the central wavelength, so COE can be replaced in a more simplified process and at a lower cost.

[0057] Embodiment 2 Based on the same concept, the present invention provides a method for preparing an OLED display panel with an FPR liquid crystal phase difference compensation layer according to the first embodiment. The method is used to prepare a polarizing substrate 100, and comprises the following steps: 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 bonding adhesive layer 400 and a FPR type quarter phase delay layer 202 are sequentially laminated and attached on the side of the lower TAC layer 203 close to the polarizing substrate 100 , and then a Primer layer 201 is coated on the FPR type quarter phase delay layer 202 .

[0058] Embodiment 3 The present invention further provides an optical application device, comprising the OLED display panel in the above-mentioned embodiment 1. The optical application device composed of the cholesterol liquid crystal brightness enhancement film and the OLED display panel in the above-mentioned embodiment 1 can be applied to a device having an OLED display panel to improve the overall brightness enhancement efficiency and alleviate the problems of large viewing angle difference and natural light reflection.

[0059] Among them, light-emitting diodes include organic light-emitting diodes (OLED) and quantum dot light-emitting diodes (QLED). Devices using organic light-emitting diode displays can be bracelets, folding phones, VR devices, and so on.

[0060] Those skilled in the art should understand that the technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An OLED display panel with a FPR liquid crystal phase difference compensation layer, characterized in that: include: A polarizing substrate, comprising an upper TAC layer and a PVA layer which are laminated and connected to each other; A phase compensation layer, comprising a lower TAC layer and an FPR type quarter phase delay layer, wherein the lower TAC layer has two oppositely disposed sides, one side is connected to the PVA layer, and the other side is laminated and attached to the FPR type quarter phase delay layer; A Primer layer, coated on the FPR type quarter phase delay layer; RGB cholesteric liquid crystal layer, including R, G, B cholesteric liquid crystal layers arranged in a stacked manner, the three layers are connected by a bonding adhesive layer, and the RGB cholesteric liquid crystal layer is formed by coating left-handed or right-handed cholesteric liquid crystal; Among them, the angle range between the first optical axis of the FPR type quarter phase delay layer and the absorption axis of the polarizing substrate is [40°, 50°], the angle range between the second optical axis of the FPR type quarter phase delay layer and the absorption axis of the polarizing substrate is [-50°, -40°], and the light transmission position of the FPR type quarter phase delay layer is aligned with the position of each RGB pixel point, including a first angle of 45° and a second angle of -45°.

2. The OLED display panel with FPR liquid crystal phase difference compensation layer according to claim 1, characterized in that: The polarizing substrate, the phase compensation layer and the RGB cholesteric liquid crystal layer are laminated to each other using a laminating adhesive layer.

3. The OLED display panel with FPR liquid crystal phase difference compensation layer according to claim 1, characterized in that: The phase compensation layer further includes a positive C-plate viewing angle compensation film, which is coated on a side of the lower TAC layer away from the FPR-type quarter phase delay layer.

4. The OLED display panel with FPR liquid crystal phase difference compensation layer according to claim 1, characterized in that: The plane phase difference of the FPR type quarter phase delay layer is 110-170nm.

5. The OLED display panel with FPR liquid crystal phase difference compensation layer according to claim 1, characterized in that: The wavelength bandwidth of the RGB cholesteric liquid crystal layer at a reflectivity of more than 70% is 10-80nm.

6. The OLED display panel with FPR liquid crystal phase difference compensation layer according to claim 1, characterized in that: The phase difference value in the composite vertical plane of the phase compensation layer is -50nm-50nm.

7. The OLED display panel with FPR liquid crystal phase difference compensation layer according to claim 1, characterized in that: The central reflectivity wavelength range of the R cholesteric liquid crystal layer in the RGB cholesteric liquid crystal layer is 600-680nm; the central reflectivity wavelength range of the G cholesteric liquid crystal layer is 500-580nm; and the central reflectivity wavelength range of the B cholesteric liquid crystal layer is 400-480nm.

8. The OLED display panel with a FPR liquid crystal phase difference compensation layer according to any one of claims 1 to 7, characterized in that: 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.

9. A method for preparing an OLED display panel with a FPR liquid crystal phase difference compensation layer according to any one of claims 1 to 8, wherein the method is used to prepare a phase compensation layer, characterized in that: The following steps are involved: A positive C-plate viewing angle compensation film is coated on the side of the lower TAC layer facing away from the polarizing substrate, a bonding adhesive layer and an FPR type quarter phase delay layer are sequentially laminated on the side of the lower TAC layer close to the polarizing substrate, and then a Primer layer is coated on the FPR type quarter phase delay layer.

10. An optical application device, characterized in that: An OLED display panel with a FPR liquid crystal phase difference compensation layer comprising any one of claims 1 to 8.

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