OLED display screen assembly, streaming media rearview mirror and processing method

Abstract

The invention discloses an OLED display screen assembly, a streaming media rearview mirror and a processing method.The OLED display screen assembly comprises a base material, an OLED display screen body and a reflective polarizer which are sequentially arranged from inside to outside in the stacking direction; the OLED display screen body comprises an anode layer arranged close to the base material, a cathode layer arranged close to the reflective polaroid and a light-emitting layer arranged between the anode layer and the cathode layer. A 1 / 2 wave plate is arranged on the side, close to the light-emitting layer, of the anode layer, and efficient polarization conversion and recycling of S light reflected by the reflective polaroid can be achieved. When the reflected S light penetrates through the 1 / 2 wave plate twice, the polarization state of the S light is rotated by 90 degrees through the 45-degree fast axis design to be converted into P light, the P light is transmitted in the forward direction after being reflected by the anode layer and finally penetrates through the reflective polaroid, the problem that the S light is repeatedly reflected and absorbed by the reflective polaroid in a traditional framework is solved, the transmittance of visible light on the reflective polaroid is effectively improved, and the service life of the S light is prolonged. And the display brightness of the streaming media rearview mirror is obviously enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of streaming rearview mirror, and particularly relates to an OLED display screen assembly, a streaming rearview mirror and a processing method. BACKGROUND

[0002] The streaming rearview mirror is an electronic device that captures real-time images behind a vehicle through a camera installed on the vehicle and displays the images on a monitor in the vehicle.

[0003] The traditional streaming rearview mirror has two core problems: 1) Limitations of display technology itself: the LCD display screen used in mainstream streaming rearview mirrors is prone to reflection and has insufficient contrast in high-brightness scenarios (such as direct sunlight); while the OLED display screen has the advantages of self-emission and high contrast, but is limited by the low transmittance of circularly polarized light (generally only 41%), making it difficult to meet the "brightness > 1600 cd / m 2 " standard required by streaming rearview mirrors.

[0004] 2) Cost contradiction: if the luminous material of the OLED display screen is upgraded (such as increasing the thickness of the light-emitting layer or using high-efficiency phosphor materials) to improve display brightness, the hardware cost will be significantly increased, which does not meet the low-cost mass production requirements of vehicle-mounted electronic components.

[0005] Therefore, the traditional OLED display screen architecture cannot simultaneously meet the "low cost + high brightness" demand of vehicle-mounted applications and cannot be directly integrated into streaming rearview mirrors. SUMMARY

[0006] In order to overcome the technical problem that the traditional OLED display screen architecture described in the prior art cannot simultaneously meet the "low cost + high brightness" demand of vehicle-mounted applications, the present application provides an OLED display screen assembly, a streaming rearview mirror and a processing method, which can significantly improve the brightness of the streaming rearview mirror without changing the brightness.

[0007] The technical scheme adopted by the present application to solve the problem is: An OLED display screen assembly comprises a substrate, an OLED display screen body and a reflective polarizer arranged in sequence from inside to outside along a stacking direction, the OLED display screen body comprises an anode layer arranged close to the substrate, a cathode layer arranged close to the reflective polarizer, and a light-emitting layer arranged between the anode layer and the cathode layer; wherein the anode layer is provided with a 1 / 2 wave plate on the side close to the light-emitting layer; the OLED display screen body is used to emit self-luminous light containing S light and P light when working, when the self-luminous light reaches the reflective polarizer, the P light penetrates the reflective polarizer, and the S light is reflected by the reflective polarizer, the reflected S light first passes through the 1 / 2 wave plate, is reflected by the anode layer, and then passes through the 1 / 2 wave plate again, and finally returns to the reflective polarizer and penetrates out.

[0008] In the above scheme, in order to solve the problem that the S light is repeatedly reflected and absorbed by the reflective polarizer in the OLED display screen architecture of the traditional streaming rearview mirror, the 1 / 2 wave plate is designed to rotate the polarization state of the reflected S light by 90° to convert it into P light, thereby greatly improving the utilization rate of the self-luminous light (containing S light and P light) generated by the light-emitting layer, effectively improving the transmittance of visible light on the reflective polarizer, and significantly enhancing the display brightness of the streaming rearview mirror.

[0009] As a preferred scheme, the fast axis direction of the 1 / 2 wave plate and the polarization direction of the S light are at an angle of 45°, so that the polarization direction of the reflected S light is rotated by 90° after passing through the 1 / 2 wave plate, thereby being converted into P light.

[0010] In the above preferred scheme, the fast axis angle design of the 1 / 2 wave plate can realize S light to P light conversion, so that the S light reflected by the reflective polarizer is completely converted into effective light that can penetrate, thereby improving the OLED light utilization rate and brightness, and thus adapting to the demand for strong light on vehicles.

[0011] As a preferred scheme, the OLED display screen body further comprises a BM, the BM is located between the substrate and the cathode layer, and the light-emitting layers are arranged at intervals along the planar extension direction of the OLED display screen body, so as to form a first gap between adjacent two light-emitting layers, and the BM fills the first gap.

[0012] In the above preferred scheme, the BM filling the first gap can block light leakage of the light-emitting layer, isolate adjacent light-emitting layers to avoid color mixing, ensure independent light emission of sub-pixels to guarantee color purity and accuracy, and its black characteristic can absorb stray light to prevent gap reflection from whitening, thereby improving the contrast.

[0013] As a preferred scheme, the anode layers are arranged at intervals along the planar extension direction of the OLED display screen body, so as to form a second gap between adjacent two anode layers, and the BM fills the second gap.

[0014] In the above preferred solution, the BM fills the second gap of the anode layer, separates adjacent anode units to prevent short circuit, ensures independent driving of the light-emitting layer and accurate signal transmission, and can block stray light reflected by the anode layer, which is superimposed with the effect of filling the first gap, thereby doubling the picture contrast and color purity.

[0015] As a preferred solution, the reflective polarizer preferably uses an RPM film.

[0016] As a preferred solution, the OLED display screen body further comprises an optical adhesive layer, which is located between and closely attached to the reflective polarizer and the cathode layer, and the refractive index of the optical adhesive layer matches that of the cathode layer and the reflective polarizer.

[0017] In the above preferred solution, the optical adhesive layer can closely attach the cathode layer and the reflective polarizer, eliminate the gap between the layers to form an integrated structure, prevent separation and displacement caused by vehicle vibration and temperature changes, and ensure stable light path and display effect. Moreover, its refractive index is the same as or close to that of the two, which can greatly eliminate interface reflection loss and ensure efficient light conduction.

[0018] As a preferred solution, the reflectivity of the anode layer to self-luminous light is 93-96%, and the wavelength range of the self-luminous light is: blue light wavelength 450-470 nm, green light wavelength 520-540 nm, and red light wavelength 610-630 nm.

[0019] In the above preferred solution, the anode layer is a key reflective carrier for reverse polarization conversion and recycling of the light path, and its high reflectivity can reduce S light loss, ensure that more S light is converted to P light after penetrating the 1 / 2 wave plate twice, and improve light utilization and display brightness.

[0020] As a preferred solution, the transmittance of the 1 / 2 wave plate to self-luminous light is greater than or equal to 99%, and the wavelength range of the self-luminous light is: blue light wavelength 450-470 nm, green light wavelength 520-540 nm, and red light wavelength 610-630 nm.

[0021] In the above preferred solution, the 1 / 2 wave plate is the core of S light polarization conversion and recycling, and its high transmittance and low absorption performance determine the light utilization and display effect. On the one hand, low transmittance and high absorption performance will greatly waste S light and reduce the intensity of recycled P light; on the other hand, high transmittance can reduce interface reflection, ensuring efficient light conduction and clear display under strong light in vehicles.

[0022] As a preferred solution, the thickness of the 1 / 2 wave plate is d, the birefringence is Δn, and the light wavelength of the light-emitting layer is λ, which satisfies the following formula: d = λ / 2Δn.

[0023] In the above preferred solution, the above thickness design can ensure that, after the S light penetrates the 1 / 2 wave plate back and forth twice, the two polarization components superimpose to generate a 90° polarization rotation, accurately converting into P light, guaranteeing the integrity and efficiency of polarization conversion, and maximizing the light utilization rate.

[0024] As a preferred solution, the OLED display assembly is not provided with a polarizing plate.

[0025] In the above preferred solution, by canceling the polarizing plate in the traditional OLED display architecture, the screening loss of the polarizing plate to the non-polarized light of the light-emitting layer can be directly eliminated, so that the self-emission of the OLED display body can directly penetrate the reflective polarizing plate, and the brightness of the body is maximized.

[0026] Based on the same design idea, the application further provides a streaming media rearview mirror using the above-mentioned OLED display assembly, the streaming media rearview mirror comprising a housing and a cover glass, the housing being provided with an opening, the cover glass being located at the opening, the OLED display assembly being arranged inside the housing, and the cover glass being arranged opposite to the OLED display assembly.

[0027] In the above solution, the housing is a core bearing and protection component of the streaming media rearview mirror, which can isolate vehicle-borne dust and water vapor and achieve anti-vibration effect, thereby protecting the internal OLED display and other components from damage and corrosion. The cover glass at the opening has anti-scratch and high light transmission, and is aligned with the OLED display body in the optical path. The structure takes into account protection and display, and the modular design facilitates installation, inspection and replacement.

[0028] As a preferred solution, the cover glass is directly attached to the reflective polarizing plate; or the streaming media rearview mirror further comprises an anti-glare lens, which is arranged between the cover glass and the reflective polarizing plate.

[0029] In the above preferred solution, the structure design of directly attaching the cover glass to the reflective polarizing plate can eliminate the air gap, reduce light reflection and scattering to improve transmission efficiency, simplify the laminated structure, reduce cost, and guarantee optical stability. In the solution of adding an anti-glare lens between the cover glass and the reflective polarizing plate, the anti-glare lens can absorb strong light to strengthen anti-glare adaptation to strong light scenes, buffer and protect the reflective polarizing plate, and does not affect the transmission of self-emission, and takes into account display clarity and safety performance.

[0030] Based on the same design idea, the application further provides a processing method applied to the above-mentioned OLED display assembly, the processing method comprising the following steps: S1. Preprocessing anode layer substrate: evaporating an optical matching layer on the anode layer substrate in advance; S2. Evaporate the wave plate: in a vacuum chamber with a preset vacuum degree, heat the wave plate material to a gaseous state by physical vapor deposition or electron beam evaporation deposition; monitor the film thickness in real time to ensure that the preset thickness is reached; induce the wave plate molecules or crystal lattices to arrange in a specific direction to form a fast axis at an angle of 45° with the polarization direction of the S light; S3. Verification and calibration: confirm that the fast axis angle of the wave plate is 45° by polarization testing, and measure the transmittance and polarization conversion efficiency of the wave plate by spectral analysis to ensure the conversion effect of S light to P light.

[0031] In the above scheme, the interface optical properties are optimized by pre-treating the evaporated optical matching layer in the anode layer substrate to reduce light reflection loss. The thickness of the wave plate is controlled and a 45° fast axis is induced by precise evaporation of the wave plate in a vacuum environment, laying a foundation for S light to P light conversion. The performance of the wave plate is ensured by double detection. The overall light transmission efficiency and polarization conversion reliability are improved, the OLED light utilization rate is ensured, and the vehicle display requirements are met.

[0032] As a preferred scheme, between steps S2 and S3, the processing method further comprises the following steps: S4. Post-processing orientation: adjust the fast axis direction by rubbing orientation or light alignment technology.

[0033] In this preferred scheme, post-processing orientation is a precise calibration link of the fast axis of the 1 / 2 wave plate. Rubbing orientation and light alignment technology both use polarized light to correct the deviation of the fast axis angle caused by evaporation, ensuring that the fast axis is at an angle of 45° with the polarization direction of the S light, which not only compensates for the evaporation process error, but also improves the consistency of batch production, provides reliable protection for efficient S light to P light conversion, and reduces optical loss.

[0034] Based on the same design idea, the application also provides a processing method applied to the OLED display screen assembly described above, which comprises the following steps: S1. Prepare a pre-orientation layer: form a pre-orientation layer on the anode layer substrate, the fast axis direction of which is at an angle of 45° with the polarization direction of the S light; S2. Print the wave plate: start the printing process and adjust the printing direction to make the flow direction of the ink consistent with the 45° fast axis direction of the pre-orientation layer, and then perform solidification after printing; S3. Verification and calibration: confirm that the fast axis angle of the wave plate is 45° by polarization testing, and measure the transmittance and polarization conversion efficiency of the wave plate by spectral analysis to ensure the conversion effect of S light to P light.

[0035] In the above scheme, a 45° fast-axis pre-alignment layer is prepared to provide an orientation basis for the molecular alignment of the waveplate. The waveplate is printed and cured according to the pre-alignment direction, precisely forming a waveplate that meets the polarization conversion requirements. Dual testing ensures performance compliance. The scheme is suitable for mass production, with controllable costs, and can efficiently achieve S-light to P-light conversion, improving OLED light utilization and display stability.

[0036] In summary, the OLED display assembly, streaming media rearview mirror, and processing method provided by this invention have at least the following technical advantages compared to the prior art: 1) This invention achieves efficient polarization conversion and recovery of S-light reflected by a reflective polarizer by depositing a half-wave plate with a fast axis direction at 45° to the S-light polarization direction on the side of the anode layer near the light-emitting layer. Specifically, when the S-light reflected by the reflective polarizer penetrates the light-emitting layer in the reverse direction and passes through the half-wave plate twice, the 45° fast axis design rotates its polarization state by 90°, converting it into P-light. After being reflected by the anode layer, it propagates in the forward direction and finally penetrates the reflective polarizer. This design completely solves the problem of repeated reflection and absorption of S-light by the reflective polarizer in traditional architectures, significantly improving the utilization rate of unpolarized light (including S-light and P-light) generated by the light-emitting layer, effectively increasing the transmittance of visible light on the reflective polarizer, and significantly enhancing the display brightness of the streaming media rearview mirror. At the same time, the integrated design of the deposited half-wave plate and the anode layer avoids polarization state disorder caused by the introduction of additional optical components, ensuring display color accuracy and meeting the clear display requirements in strong in-vehicle light environments.

[0037] 2) This invention eliminates the polarizer in the traditional OLED display architecture, directly eliminating the filtering loss of unpolarized light from the emitting layer caused by the polarizer (traditional polarizers only allow about 41% of light to pass through). This allows the self-emissive light from the OLED display itself to directly penetrate the reflective polarizer, maximizing the brightness of the display. Furthermore, since streaming media rearview mirror applications do not require low reflectivity, and the core function of traditional polarizers is precisely to reduce ambient light reflection, their removal does not affect normal operation. Therefore, combined with the S-light recovery function of the 1 / 2 wave plate, a dual gain of "no polarizer loss + reuse of reflected light" can be achieved, further amplifying the brightness enhancement effect while balancing performance optimization and cost control. Ultimately, this achieves an increase in the brightness of the streaming media rearview mirror without changing the overall brightness of the OLED display assembly. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the architecture of a traditional streaming media rearview mirror; Figure 2 This is a schematic diagram of the architecture of the streaming media rearview mirror including an OLED display assembly according to the present invention; Figure 3 This is a schematic diagram of the first processing method of the present invention applied to an OLED display assembly; Figure 4 Figure 2 is a schematic diagram of a second processing method for an OLED display screen assembly according to the present application.

[0039] In the drawings, the reference signs have the following meanings: 1, substrate; 2, anode layer; 3, cathode layer; 4, light-emitting layer; 5, 1 / 2 wave plate; 6, reflective polarizer; 7, BM; 8, optical adhesive layer; 9, cover glass; 10, polarizer; 11, OLED display screen body. DETAILED DESCRIPTION

[0040] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0041] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a particular orientation, to be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application.

[0043] Referring to Figure 1 As shown in the figure, the architecture of the conventional streaming rearview mirror is: from the inside to the outside, there are substrate 1, OLED display screen body 11, polarizer 10 (generally circular polarizer), reflective polarizer 6 and cover glass 9. The working principle is: after the OLED display screen body 11 is powered on, the self-emission of the light-emitting layer propagates in the direction of the polarizer 10 (i.e. towards the outside direction). The circular polarizer is generally composed of a linear polarizer 10 and a 1 / 4 wave plate, the linear polarizer 10 only allows about 50% of the polarized light consistent with the transmission axis to pass through, and the 1 / 4 wave plate converts it into circularly polarized light, which is finally transmitted to the human eye through the cover glass 9. At the same time, the circular polarizer can absorb the ambient light reflected by the OLED cathode to avoid glare.

[0044] However, in the architecture design, the selection of the circular polarizer results in more than 50% light loss of the light-emitting layer, for example, the conventional polarizer only allows about 41% of the light to pass through, and the overall brightness and light utilization rate are low.

[0045] Embodiment 1 Referring to Figure 2As shown, the first embodiment of the present application provides an OLED display assembly, which comprises a substrate 1, an OLED display body and a reflective polarizer 6 arranged in sequence from inside to outside along a stacking direction. The OLED display body comprises an anode layer 2 arranged close to the substrate 1, a cathode layer 3 arranged close to the reflective polarizer 6, and a light-emitting layer 4 arranged between the anode layer 2 and the cathode layer 3.

[0046] The substrate 1 is used as a bottom bearing structure, which is preferably made of glass or flexible PI and the like, and provides stable support for each layer assembly on the outside, so as to ensure the mechanical strength and shape stability of the overall structure of the OLED display assembly. The reflective polarizer 6 is a core polarization control component, which only allows P light to pass through and reflects S light to the 1 / 2 wave plate 5 to complete the conversion of S light to P light, and can replace part of the anti-glare function of the traditional polarizer 10 to avoid environmental light reflection interference.

[0047] The anode layer 2 has a conductive function and injects holes into the light-emitting layer 4 after being electrified, and has a reflection function, which can reflect self-luminous light, support the reverse light path, and not change the polarization state of the light. The cathode layer 3 is a transparent conductive layer, which is responsible for injecting electrons into the light-emitting layer 4, has no light absorption or reflection characteristics, ensures that the light of the light-emitting layer 4 can penetrate in both directions, and supports the forward and reverse light paths. The light-emitting layer is the light source of the OLED display body, which generates unpolarized light through electron-hole recombination, and finally makes the OLED display body emit self-luminous light containing S light and P light when working.

[0048] In the technical scheme of this embodiment, the 1 / 2 wave plate 5 is arranged on the side of the anode layer 2 close to the light-emitting layer 4 (for the OLED display body, that is, the inner side of the anode layer 2).

[0049] Preferably, the light-emitting layer 4 adopts a three-primary-color light-emitting layer, which integrates red (R), green (G), and blue (B) three kinds of light-emitting materials, and realizes full-color light emission based on the optical superposition principle.

[0050] Based on the above structural design, the OLED display assembly of the present application can form the following two light paths: 1. Forward light-emitting light path: the light-emitting layer 4 generates self-luminous light containing S light and P light through electron-hole recombination. The P light directly penetrates the transparent cathode layer 3 and is conducted to the reflective polarizer 6 with almost no loss, because the reflective polarizer 6 allows P light to pass through, and finally the P light is emitted to the human eye through the streaming media rearview mirror to form the basic display light.

[0051] 2. Reverse Polarization Conversion and Recovery Optical Path: The S-beam, which has not penetrated the reflective polarizer 6, is reflected by the reflective polarizer 6 and first reaches downwards, penetrating the half-wave plate 5. It is then reflected by the anode layer 2, which also has a reflective function. When the reflected light passes through the half-wave plate 5 again, its polarization state is rotated by 90° and converted into P-beam. This P-beam then penetrates upwards sequentially through the light-emitting layer 4 and the transparent cathode layer 3, and finally passes smoothly through the reflective polarizer 6 and exits the streaming media rearview mirror, realizing the recovery of the S-beam and significantly improving light utilization.

[0052] Therefore, the above structural design addresses the problem of S-light being repeatedly reflected and absorbed by the reflective polarizer 6 in the OLED display architecture of traditional streaming media rearview mirrors. It significantly improves the utilization rate of self-emission (including S-light and P-light) generated by the light-emitting layer 4, effectively increasing the transmittance of visible light on the reflective polarizer 6 (making the utilization rate of self-emission of the OLED display increase significantly from about 41% in the traditional solution to nearly 90%), and significantly enhancing the display brightness of the streaming media rearview mirror.

[0053] Furthermore, the 1 / 2 wave plate 5 is directly deposited on the inner side of the anode layer 2, forming an integrated structural design with the anode layer 2. This avoids the interface light loss caused by the bonding of additional wave plates and the polarization state disorder caused by the introduction of additional optical components, ensuring the accuracy of the displayed color and meeting the clear display requirements in the strong light environment of the vehicle.

[0054] In a preferred embodiment, the fast axis of the half-wave plate 5 is at a 45° angle to the polarization direction of the S-ray, so that the polarization direction of the reflected S-ray rotates by 90° after passing through the half-wave plate 5, thus converting it into P-ray. Here, the S-ray (i.e., S-linearly polarized light) is linearly polarized. Positioning the fast axis of the half-wave plate 5 at a 45° angle to the polarization direction of the S-ray decomposes the vibration direction of the S-ray into two equal-amplitude orthogonal components along the fast and slow axes. When the two components pass through the waveplate, the difference in refractive index creates an optical path difference. After anode reflection, the components pass through the waveplate again, accumulating an optical path difference of λ / 2. The two components are then superimposed, rotating the polarization state by 90°, ultimately and precisely converting into P-ray (i.e., P-linearly polarized light).

[0055] Specifically, the fast axis angle design of the aforementioned 1 / 2 wave plate 5 enables the conversion of S-beam to P-beam, ensuring that the S-beam reflected by the reflective polarizer 6 can be completely converted into effective light that can penetrate the reflective polarizer 6, avoiding incomplete conversion or light loss caused by angle deviation, while maximizing polarization conversion efficiency, so that all the originally wasted S-beam can be recycled and reused, significantly improving the light utilization rate and display brightness of OLED self-emissive light, and further adapting to the needs of strong light environment in vehicles.

[0056] See Figure 1 As shown, the OLED display architecture of traditional streaming rearview mirrors includes a polarizer 10, which results in only about 41% of self-emissive light being transmitted, leading to low overall brightness and light utilization.

[0057] Referring to Figure 2 As shown in the preferred embodiment, in the preferred embodiment, the OLED display assembly is not provided with the polarizer 10, that is, the polarizer 10 in the traditional OLED display architecture is cancelled, and the screening loss of the polarizer 10 to the non-polarized light of the light-emitting layer is directly eliminated, so that the self-luminous of the OLED display body can directly penetrate the reflective polarizer 6, and the brightness of the body is maximized. At the same time, since the streaming media rearview mirror application does not need to meet the low reflection requirement, and the core function of the traditional polarizer 10 is to reduce the reflection of ambient light, therefore, the cancellation does not affect the normal work of the streaming media rearview mirror. Therefore, in combination with the S light recycling function realized by the 1 / 2 wave plate 5, the OLED display assembly of the present application has the dual gain of “no polarizer 10 loss + recycling of reflected light”, which further amplifies the brightness improvement effect, and finally realizes the brightness improvement of the streaming media rearview mirror on the basis of the unchanged brightness of the OLED display assembly.

[0058] Further, by reducing the element of the polarizer 10, not only the material procurement and bonding process cost is reduced, but also the laminated structure of the OLED display assembly is simplified, the product is thinned, and the limited installation space of the vehicle-mounted rearview mirror is adapted.

[0059] Referring to Figure 2 As shown in the preferred embodiment, the OLED display body further comprises a BM 7, the BM 7 is located between the substrate 1 and the cathode layer 3, and the light-emitting layer 4 is arranged at intervals along the planar extension direction of the OLED display body, so that a first gap is formed between the two adjacent light-emitting layers 4, and the BM 7 fills the first gap. Among them, by filling the first gap between the light-emitting layers 4 through the BM 7 (black matrix), the light shielding and isolation effect can be realized.

[0060] Specifically, the BM 7 filling the first gap can block the light leakage of the light-emitting layer 4 from the gap, and at the same time, isolate the adjacent light-emitting layers 4 (red, green and blue), avoid the mutual crosstalk of different color lights, ensure the independent light-emitting of each sub-pixel, and protect the purity and accuracy of the display color. Moreover, the black characteristic of the BM 7 can absorb ambient stray light and internal reflected light, avoid the picture whitening caused by light reflection at the first gap, improve the display contrast, and adapt to the clear visibility in the strong light environment of the vehicle-mounted. In addition, after the BM 7 fills the first gap, it can form a lateral support for the light-emitting layer 4 arranged at intervals, cooperate with the substrate 1, the anode layer 2 and the cathode layer 3, and strengthen the mechanical strength of the overall OLED display laminated structure, resist the structural deformation risk caused by the vehicle-mounted vibration.

[0061] Further, referring to Figure 2 As shown in the preferred embodiment, the anode layer 2 is arranged at intervals along the planar extension direction of the OLED display body, so that a second gap is formed between the two adjacent anode layers 2, and the BM 7 fills the second gap.

[0062] Specifically, since the BM 7 has insulation properties, the adjacent anode layer 2 units can be effectively separated by filling the second gap between the anode layers 2, avoiding short circuit or leakage between electrodes, ensuring that each anode layer 2 unit is independently powered to drive the corresponding light-emitting layer, ensuring accurate transmission of display signals and preventing display errors. Moreover, the BM 7 filling the second gap can further block stray light reflected by the anode layer 2 from leaking from the gap, while avoiding ambient light from entering the interior through the gap to interfere with the display. In combination with the effect of filling the first gap of the light-emitting layer 4, the picture contrast and color purity are doubled. In addition, the BM 7 fills both the first gap and the second gap, providing bidirectional support for the light-emitting layer 4 and the anode layer 2 arranged at intervals, strengthening the tightness and mechanical strength of the layered structure, and improving the ability to resist vehicle vibrations and impacts.

[0063] In a preferred embodiment, the reflective polarizer 6 can use an RPM film that allows P light to directly penetrate to ensure basic light emission, can reflect S light to the 1 / 2 wave plate 5 for conversion to P light for recycling, and can replace part of the anti-glare function of the traditional circular polarizer to support the elimination of the polarizer 10 to eliminate screening loss and improve light utilization in cooperation with the 1 / 2 wave plate 5.

[0064] Referring to Figure 2 As shown in the figure, in a preferred embodiment, the OLED display screen body further includes an optical adhesive layer 8 located between and closely attached to the reflective polarizer 6 and the cathode layer 3. The optical adhesive layer 8, as a bonding medium, can closely attach the cathode layer 3 (OLED display screen body) and the reflective polarizer 6 (polarization control assembly), eliminate the physical gap between the two layers, and form a stable integrated structure, thereby avoiding separation or displacement of the two layers due to vehicle vibration and temperature changes, ensuring stable light path transmission, and preventing display misalignment, uneven brightness, and other phenomena caused by loose structure.

[0065] Further, the refractive index of the optical adhesive layer 8 matches that of the cathode layer 3 and the reflective polarizer 6, i.e., the refractive index of the optical adhesive layer 8 is the same as or has a very small numerical difference (e.g., ≤0.05) from that of the cathode layer 3 and the reflective polarizer 6, thereby greatly reducing the reflection loss of light at the two interfaces between the "cathode layer 3-OCA" and the "OCA-reflective polarizer 6", and ensuring efficient light conduction.

[0066] Optionally, the optical adhesive layer 8 is a transparent optical adhesive layer 8, and preferably an OCA.

[0067] In a preferred embodiment, the anode layer has a reflectivity of 93-96% for self-emission, and the wavelength range of self-emission is: blue light wavelength of 450-470 nm, green light wavelength of 520-540 nm, and red light wavelength of 610-630 nm.

[0068] Specifically, the self-emitting light is visible light, and the anode layer 2 is a key reflection carrier of the reverse polarization conversion recycling light path in the application. The high reflection performance of the anode layer 2 to the visible light can reduce the energy loss of the S light in the reflection process, ensure that more S light is converted into P light after penetrating the 1 / 2 wave plate 5 twice, and then penetrate the reflective polarizer 6 to be effectively used, thereby directly improving the light utilization rate and display brightness.

[0069] Optionally, since the anode layer 2 needs to realize the injection of holes to the light-emitting layer 4 (that is, the conductive function) and the reflection of the S light penetrating the 1 / 2 wave plate 5 (that is, the reflection function), the anode layer 2 can adopt a composite structure of a conductive substrate + a reflection layer (such as an ITO indium tin oxide film stacked with a metal reflection layer). The reflection layer is selected from a metal material (such as silver Ag, aluminum Al or an alloy thereof) with high reflectivity in the visible light band.

[0070] In a preferred embodiment, the transmittance of the 1 / 2 wave plate to the self-emitting light is greater than or equal to 99%, and the wavelength range of the self-emitting light is: the blue light wavelength is 450-470 nm, the green light wavelength is 520-540 nm, and the red light wavelength is 610-630 nm.

[0071] Specifically, the self-emitting light is visible light, and the 1 / 2 wave plate 5 is a core structure of the S light polarization conversion and recycling in the application. The high transmittance and low absorption performance of the 1 / 2 wave plate 5 to the visible light directly determine the light utilization rate and display effect. On the one hand, if the transmittance of the 1 / 2 wave plate 5 to the visible light is low and the absorption is strong, the S light generated by the light-emitting layer 4 will be greatly lost when penetrating the 1 / 2 wave plate 5, and even if the polarization conversion is completed, the intensity of the finally recycled P light will be greatly reduced. On the other hand, the high transmittance can reduce the reflection loss of the self-emitting light at the interface of the 1 / 2 wave plate 5, and ensure efficient conduction of the light path, which is suitable for clear display requirements in the strong light environment of the vehicle.

[0072] Optionally, since the 1 / 2 wave plate 5 needs to have high transmittance and low absorption performance in the visible light band, and needs to be plated with the anode layer 2, inorganic crystal materials (such as quartz, calcite, etc.) or high molecular polymer materials (such as polycarbonate PC, polyimide PI, etc.) can be preferably used.

[0073] In a preferred embodiment, the thickness of the 1 / 2 wave plate 5 is d, the birefringence is Δn, and the light wavelength of the light-emitting layer 4 is λ, which satisfies the following formula: d = λ / 2Δn.

[0074] In the above scheme, the core function of the 1 / 2 wave plate 5 is to make the two orthogonal polarization components (along the fast axis and the slow axis) of the vertically incident S linearly polarized light produce a light path difference of λ / 2. The birefringence Δn is the difference between the refractive indices of the fast axis and the slow axis of the 1 / 2 wave plate 5 material, and the light path difference is determined by the thickness d and Δn (light path difference = Δn•d). When d = λ / 2Δn, Δn•d = λ / 2 is exactly satisfied, realizing a half-wavelength light path difference. Thus, for a specific wavelength λ of the light-emitting layer 4, the above thickness design can ensure that after the S light penetrates the 1 / 2 wave plate 5 twice, the two polarization components are superimposed to produce a 90° polarization rotation, accurately converting the S light into P light, ensuring the integrity and efficiency of the polarization conversion, providing a basis for S light recycling, and maximizing light utilization.

[0075] Furthermore, for different light waves of the light-emitting layer 4, since the wavelengths are different, the thicknesses of the corresponding 1 / 2 wave plates 5 are also different, that is, the thicknesses of the 1 / 2 wave plates 5 and the anode layer 2 corresponding to different light-emitting layers 4 are different, ensuring that the S light of red, green, and blue three primary colors can be efficiently converted into P light, avoiding incomplete conversion and color deviation caused by wavelength differences, ensuring color purity and maximizing light utilization.

[0076] For example, if the 1 / 2 wave plate 5 is made of quartz material, the thickness of the corresponding 1 / 2 wave plate 5 is designed as follows: Red light wavelength λ = 620-650 nm, according to the center wavelength 635 nm, quartz Δn ≈ 0.009, then d ≈ 35.3 μm; Blue light wavelength λ = 450-480 nm, according to the center wavelength 475 nm, quartz Δn ≈ 0.009, then d ≈ 26.39 μm; Green light wavelength λ = 520-550 nm, according to the center wavelength 535 nm, quartz Δn ≈ 0.009, then d ≈ 29.72 μm.

[0077] Finally, for different wavelengths of self-luminous light, the thickness of the corresponding 1 / 2 wave plate 5 is set.

[0078] Embodiment 2 In the second embodiment of the present application, a streaming rearview mirror using the above-mentioned OLED display screen assembly is provided.

[0079] In the technical scheme of this embodiment, the streaming rearview mirror includes a housing and a cover glass 9, the housing is provided with an opening, the cover glass 9 is located at the opening, the OLED display screen assembly is arranged inside the housing, and the cover glass 9 is arranged opposite to the OLED display screen assembly.

[0080] Specifically, the shell is the core bearing and protection base of the streaming rearview mirror, which can isolate dust, water vapor and vibration impact in the vehicle environment, and protect the internal OLED display screen assembly from physical damage and environmental erosion. The cover glass 9 arranged at the opening can not only resist external scratches, but also has high light transmittance, ensuring that the OLED display light can efficiently penetrate without visual obstruction. At the same time, the cover glass 9 is arranged opposite to the OLED assembly, which can accurately align the light path and avoid display deviation caused by structural deviation. The closed shell and the targeted opening design take into account the protection and display visibility, and the modular structure formed by the combination of various components facilitates the assembly, maintenance and replacement of the OLED assembly.

[0081] In one optional scheme of this embodiment, the cover glass 9 is directly attached to the reflective polarizer 6, that is, no other structure is arranged between the two. The above structural design can eliminate the interface light reflection and scattering loss caused by the air gap between the cover glass 9 and the reflective polarizer 6, improve the light transmission efficiency, simplify the laminated structure, reduce the attachment process and material cost, enhance the tightness and vibration resistance of the overall structure, and ensure the stability of the optical performance.

[0082] In another optional scheme of this embodiment, the streaming rearview mirror further comprises an anti-glare lens arranged between the cover glass 9 and the reflective polarizer 6.

[0083] Under the above structural design, in addition to the basic protection and light transmission functions, the anti-glare lens can strengthen the anti-glare effect by absorbing environmental strong light, adapt to strong light scenes such as noon and meeting, and can also buffer external impact to additionally protect the reflective polarizer 6, without affecting the penetration of P light and the reflection of S light, and taking into account the display clarity and use safety.

[0084] Optionally, the anti-glare lens preferably adopts LC lens or EC lens, both of which have good anti-glare effect in the application of the streaming rearview mirror.

[0085] Embodiment 3 In the third embodiment of the present application, a processing method of the OLED display screen assembly applied in the above embodiments is provided.

[0086] Referring to Figure 3 In the technical scheme of this embodiment, the processing method comprises the following steps: S1. Pre-treat the anode layer 2 substrate: evaporate a layer of optical matching layer on the anode layer 2 substrate in advance. Wherein, the anode layer 2 preferably adopts ITO anode, and the anode layer 2 substrate is cleaned before evaporation to remove organic matter and particles (for example, treated with oxygen plasma or UV-Ozone).

[0087] Specifically, by evaporating the optical matching layer, the interface optical properties of the anode layer 2 and the subsequent wave plate layer can be optimized, the interface light reflection loss caused by the difference in refractive index between the two can be reduced, the conduction efficiency of light between the layers can be improved, a flat and clean substrate is provided for wave plate evaporation, the subsequent coating quality is ensured, and the adhesion between the anode layer 2 and the 1 / 2 wave plate 5 is ensured.

[0088] S2. Evaporate the wave plate: in a vacuum chamber with a preset vacuum degree, evaporate the wave plate material to a gaseous state by physical vapor deposition or electron beam evaporation. Real-time monitoring of the coating thickness is performed to ensure that the preset thickness is reached. The wave plate molecules or crystal lattices are induced to arrange in a specific direction to form a fast axis at an angle of 45° with the polarization direction of the S light. Among them, this step is the core link for the realization of the function of the 1 / 2 wave plate 5, and the details of the operation directly determine the polarization conversion performance.

[0089] Specifically, the vacuum chamber environment can avoid the mixing of impurities and ensure the purity of the wave plate material; physical vapor deposition or electron beam evaporation can realize uniform gaseous deposition of the material, ensure the consistency of the film layer, and form a dense and uniform optical performance film layer.

[0090] Real-time monitoring of the coating thickness is a key parameter control operation. The film thickness is fed back in real time by an optical interferometer or a quartz crystal oscillator to ensure that the final thickness strictly matches the formula d = λ / 2Δn (which needs to be calibrated for different wavelengths of the light-emitting layer 4), and the thickness of the 1 / 2 wave plate 5 in different regions meets the optical path difference requirements of different light-emitting layers 4, avoiding the deviation of the optical path difference from λ / 2 due to thickness deviation, thereby preventing incomplete polarization conversion.

[0091] Inducing the directional arrangement of wave plate molecules or crystal lattices (for example, by magnetic field assistance, substrate inclination, or temperature gradient regulation) is the core operation to realize the 45° angle between the fast axis and the polarization direction of the S light. This angle design is the premise for the S light to complete a 90° polarization rotation after penetrating the 1 / 2 wave plate 5 back and forth, and is the key to ensuring that the optical performance of the 1 / 2 wave plate 5 meets the standards.

[0092] S3. Verification and calibration: the fast axis angle of the wave plate is confirmed to be 45° by polarization testing, and the transmittance and polarization conversion efficiency of the wave plate are measured by spectral analysis to ensure the conversion effect from S light to P light.

[0093] In this operation step, polarization testing can be performed by an ellipsometer or a polarization microscope to accurately quantify whether the fast axis angle is strictly 45°, ensuring that the structural basis for polarization conversion is correct. Since angle deviation will directly cause incomplete rotation of the S light, this step can eliminate 1 / 2 wave plates 5 with substandard angles from the source.

[0094] Spectroscopic analysis verifies whether there is excessive absorption of light in the transmission of the 1 / 2 wave plate 5 and whether the conversion reaches the design expectation (e.g., the conversion efficiency is greater than or equal to 95%) by measuring the transmittance and the conversion efficiency of S light to P light, and finally guarantees the consistency of the optical performance of the product through double detection to provide a quality barrier for the efficient operation of the subsequent light path.

[0095] Referring to Figure 3 As shown in the preferred scheme of this embodiment, between steps S2 and S3, the processing method further includes the following steps: S4. Post-processing orientation: adjusting the fast axis direction through rubbing orientation or light alignment technology.

[0096] In the above steps, the post-processing orientation is the precise calibration link of the fast axis direction of the 1 / 2 wave plate 5. Among them, the rubbing orientation induces molecular rearrangement by orienting the surface of the film layer, and the light alignment technology triggers the lattice orientation of the photosensitive material by using polarized light. Both of them can specifically correct the possible deviation of the fast axis angle (such as the deviation caused by uneven deposition rate, etc.) in the evaporation operation of step S2, to ensure that the fast axis is strictly 45° to the polarization direction of S light.

[0097] Therefore, the above steps can compensate for the slight errors of the evaporation process in step S2, improve the consistency of the angle of the 1 / 2 wave plate 5 in batch production, provide more reliable structural protection for the subsequent efficient conversion of S light to P light, and reduce the loss of optical performance caused by angle deviation.

[0098] It is worth mentioning that compared with the printing process used in the next embodiment, the evaporation process used in this embodiment has the advantages of more uniform and dense evaporation film layer, high purity, strong adhesion, etc., and is suitable for high melting point wave plate materials, and the optical performance is more stable.

[0099] Embodiment 4 In the fourth embodiment of the present application, a processing method for the OLED display screen assembly of the above-mentioned embodiments is provided.

[0100] Referring to Figure 4 As shown in the technical scheme of this embodiment, the processing method includes the following steps: S1. Preparing a pre-oriented layer: forming a pre-oriented layer with a fast axis direction at 45° to the polarization direction of S light on the substrate of the anode layer 2. Among them, this step is used to lay the foundation for the directional structure of the 1 / 2 wave plate 5.

[0101] Specifically, forming a pre-alignment layer with a fast axis at 45° to the polarization direction of S light on the anode layer 2 substrate can construct a directional template through rubbing or light alignment, etc., to provide arrangement guidance for the subsequent printed wave plate ink molecules, which can avoid the disorder distribution of the ink molecules after solidification to cause the fast axis deviation, ensure the wave plate polarization direction to meet the design requirements from the source, and enhance the interfacial adhesion between the pre-alignment layer and the anode layer 2 and the subsequent wave plate layer, and improve the overall structural stability.

[0102] S2. Printing wave plate: starting the printing process, adjusting the printing direction to make the flow direction of the ink consistent with the 45° fast axis direction of the pre-alignment layer, and performing solidification after printing. This step is the core step of forming the 1 / 2 wave plate 5.

[0103] Specifically, by adjusting the printing direction to be consistent with the 45° fast axis of the pre-alignment layer, the functional molecules in the ink can be precisely guided to arrange in order along the preset direction, which lays the foundation for the directional structure of the polarization conversion of S light to P light. The solidification process (such as thermal curing, UV curing, etc.) after printing can stabilize the molecular arrangement, ensure that the film thickness strictly matches the optical path difference requirement of d = λ / 2Δn, and guarantee the polarization conversion efficiency.

[0104] S3. Verification and calibration: through polarization testing, it is confirmed that the fast axis angle of the wave plate is 45°, and through spectral analysis, the transmittance and polarization conversion efficiency of the wave plate are measured to ensure the conversion effect from S light to P light.

[0105] Consistent with the previous embodiment, in this operation step, polarization testing can be performed through an ellipsometer or a polarization microscope to accurately quantify whether the fast axis angle is strictly 45°, and to ensure that the structural basis of polarization conversion is correct. Since angle deviation will directly cause incomplete rotation of S light, this step can eliminate 1 / 2 wave plates 5 with angle deviation from the source. Spectral analysis measures the transmittance and conversion efficiency from S light to P light to verify whether there is excessive absorption of light in the 1 / 2 wave plate 5 and whether the conversion meets the design expectation (such as conversion efficiency ≥ 95%), and finally ensures the consistency of the optical performance of the product through double detection to provide a quality barrier for the efficient operation of the subsequent optical path.

[0106] It is worth mentioning that, compared with the evaporation process used in the previous embodiment, the printing process used in this embodiment is more suitable for mass production and can accurately match the directional effect of the pre-alignment layer.

[0107] The technical means disclosed in the present application scheme is not limited to the technical means disclosed in the above embodiments, but also includes technical solutions composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the present application.

Claims

1. An OLED display assembly, characterized in that, The device comprises a substrate, an OLED display body, and a reflective polarizer arranged sequentially from the inside to the outside along the stacking direction. The OLED display body includes an anode layer disposed near the substrate, a cathode layer disposed near the reflective polarizer, and a light-emitting layer disposed between the anode layer and the cathode layer. A half-wave plate is provided on the side of the anode layer near the light-emitting layer. The OLED display body emits self-emissive light containing S-rays and P-rays during operation. When the self-emissive light reaches the reflective polarizer, the P-rays penetrate the reflective polarizer, and the S-rays are reflected by the reflective polarizer. The reflected S-rays first pass through the half-wave plate, are reflected by the anode layer, pass through the half-wave plate again, and finally return to the reflective polarizer and exit.

2. The OLED display assembly according to claim 1, characterized in that, The fast axis of the half-wave plate is at 45° to the polarization direction of the S-light, so that the polarization direction of the reflected S-light is rotated by 90° after passing through the half-wave plate, thereby converting it into P-light.

3. The OLED display assembly according to claim 1, characterized in that, The OLED display body also includes a BM, which is located between the substrate and the cathode layer. The light-emitting layers are spaced apart along the plane extension direction of the OLED display body so that a first gap is formed between two adjacent light-emitting layers, and the BM fills the first gap.

4. The OLED display assembly according to claim 3, characterized in that, The anode layers are spaced apart along the plane of the OLED display body to form a second gap between two adjacent anode layers, and the BM fills the second gap.

5. The OLED display assembly according to claim 1, characterized in that, The reflective polarizer is an RPM film.

6. The OLED display assembly according to claim 1, characterized in that, The OLED display body also includes an optical adhesive layer, which is located between and closely adhered to the reflective polarizer and the cathode layer, and the refractive index of the optical adhesive layer is matched with that of the cathode layer and the reflective polarizer.

7. The OLED display assembly according to claim 1, characterized in that, The reflectivity of the anode layer for self-luminescence is 93-96%, and the wavelength range of the self-luminescence is: 450-470nm for blue light, 520-540nm for green light, and 610-630nm for red light.

8. The OLED display assembly according to claim 1, characterized in that, The transmittance of the half-wave plate for self-luminescence is greater than or equal to 99%, and the wavelength range of the self-luminescence is: 450-470nm for blue light, 520-540nm for green light, and 610-630nm for red light.

9. The OLED display assembly according to claim 1, characterized in that, The thickness of the half-wave plate is d, the birefringence is Δn, and the wavelength of the light-emitting layer is λ, which satisfies the following formula: d = λ / 2Δn.

10. The OLED display assembly according to any one of claims 1-9, characterized in that, The OLED display assembly does not have a polarizer.

11. A streaming media rearview mirror using the OLED display assembly according to any one of claims 1-10, characterized in that, The streaming media rearview mirror includes a housing and a cover glass. The housing has an opening, and the cover glass is located at the opening. The OLED display assembly is located inside the housing, and the cover glass is disposed opposite to the OLED display assembly.

12. The streaming media rearview mirror according to claim 11, characterized in that, The cover glass is directly bonded to the reflective polarizer; or, the streaming media rearview mirror further includes an anti-glare lens, which is disposed between the cover glass and the reflective polarizer.

13. A processing method for an OLED display assembly according to any one of claims 1-10, characterized in that, The processing method includes the following steps: S1. Pre-treatment of the anode substrate: An optical matching layer is pre-deposited on the anode substrate; S2. Evaporated waveplate: In a vacuum chamber with a preset vacuum level, the waveplate material is heated to a gaseous state by physical vapor deposition or electron beam evaporation; the coating thickness is monitored in real time to ensure that the preset thickness is achieved; the waveplate molecules or lattice are induced to align in a specific direction to form a fast axis at 45° to the polarization direction of the S-ray; S3. Verification and Calibration: The fast axis angle of the waveplate is confirmed to be 45° through polarization testing. The transmittance and polarization conversion efficiency of the waveplate are measured through spectral analysis to ensure the conversion effect from S-light to P-light.

14. The processing method according to claim 13, characterized in that, Between steps S2 and S3, the processing method further includes the following steps: S4. Post-processing orientation: Adjust the direction of the fast axis by friction orientation or optical alignment technology.

15. A processing method for an OLED display assembly according to any one of claims 1-10, characterized in that, The processing method includes the following steps: S1. Preparation of pre-alignment layer: A pre-alignment layer is formed on the anode substrate with the fast axis direction at 45° to the polarization direction of the S-ray; S2. Printing waveplate: Start the printing process, adjust the printing direction so that the ink flow direction is consistent with the 45° fast axis direction of the pre-oriented layer, and cure after printing; S3. Verification and Calibration: The fast axis angle of the waveplate is confirmed to be 45° through polarization testing. The transmittance and polarization conversion efficiency of the waveplate are measured through spectral analysis to ensure the conversion effect from S-light to P-light.

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