Under-screen imaging optical system with micropores and brush palm equipment

Abstract

The utility model discloses an under-screen imaging optical system with micropores and a brush palm device, and the system comprises a display screen unit which is used for displaying an image; the micropore array layer is arranged above the display screen unit, comprises a plurality of light holes and allows light to pass through; and the under-screen imaging module is arranged below the display screen unit and is used for generating an image. According to the utility model, advanced optical design and principle are utilized, high-definition imaging effect is realized, and integrity of the display screen is maintained at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of under-screen imaging, and specifically, to an under-screen imaging optical system with micropores and a palm-sweeping device. Background Art

[0002] Under-screen display technology is a technology that integrates a display under the screen to achieve a borderless full-screen experience.

[0003] The core of under-screen display technology lies in improving the utilization rate and aesthetics of the screen without sacrificing display effects and functions. To achieve this goal, multiple technical problems such as screen transmittance, pixel density, and imaging quality need to be solved. The following will introduce each aspect of under-screen display technology in detail:

[0004] Under-screen fingerprint recognition technology (Under Display, i.e., UD): This is one of the most common applications of under-screen technology. By embedding a fingerprint sensor under the screen, users can complete operations such as unlocking and payment by simply touching the screen. Currently, optical and ultrasonic are two mainstream under-screen fingerprint recognition technologies. The optical type recognizes by the screen emitting light and reflecting the fingerprint image, while the ultrasonic type emits sound waves to penetrate the screen and precisely capture the fingerprint texture. Ultrasonic technology has gradually become the mainstream due to its higher recognition accuracy and speed.

[0005] Under-screen camera technology (Camera Under Panel, i.e., CUP): The goal of this technology is to hide the front camera under the screen, making the "forehead" of the mobile phone completely disappear. Under-screen cameras need to solve the problem of difficult light transmission caused by high screen pixel density. By adjusting the screen pixel arrangement and material selection, the light transmittance can be improved. For example, using transparent oxide materials instead of traditional silicon materials can greatly enhance the light transmission efficiency. In addition, the application of AI image processing technology is also an important means to optimize the shooting effect. By real-time processing of the captured pictures, the image quality problems caused by insufficient light can be effectively improved.

[0006] Under-screen biometric technology: In addition to fingerprint recognition, face recognition is also an important biometric recognition method. By embedding an infrared camera and a dot projector under the screen, 3D modeling and face recognition can be achieved. Apple's Face ID is realized through this technology. With the continuous progress of technology, more innovative under-screen biometric methods may emerge in the future, such as iris recognition and gesture recognition.

[0007] Under-screen environmental sensing technology: Modern smartphones not only need to achieve display and photography functions, but also need to have environmental sensing capabilities. For example, under-screen ambient light sensors, distance sensors, etc. can achieve automatic screen brightness adjustment and power-saving modes. These technologies are realized by embedding micro sensors under the screen, and have little impact on the screen display effect.

[0008] With the development of full-screen technology, users have higher requirements for the integrity and visual experience of the device screen. Under-screen imaging technology has become the key to achieving a full-screen design, but existing technologies still face challenges in imaging quality, screen display effect, and their coordinated operation.

[0009] The disclosure of the above background technical content is only used to assist in understanding the inventive concept and technical solution of the present utility model, and it does not necessarily belong to the prior art of this patent application. Without clear evidence indicating that the above content was publicly available on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of this application. Summary of the Utility Model

[0010] To this end, the present utility model utilizes advanced optical designs and principles to achieve high-definition imaging effects while maintaining the integrity of the display screen.

[0011] In a first aspect, the present utility model provides an under-screen imaging optical system with micropores, characterized by comprising:

[0012] A display screen unit for displaying images;

[0013] A micropore array layer disposed above the display screen unit, including a plurality of light-transmitting holes to allow light to pass through;

[0014] An under-screen imaging module disposed below the display screen unit for generating images.

[0015] Optionally, in the under-screen imaging optical system with micropores, the under-screen imaging module is located at the center of the display screen unit.

[0016] Optionally, in the under-screen imaging optical system with micropores, the micropore array layer includes a first array and a second array, and the first array and the second array have different array structures.

[0017] Optionally, in the under-screen imaging optical system with micropores, the first array is located above the under-screen imaging module.

[0018] Optionally, the under-screen imaging optical system with micropores further comprises:

[0019] An optical compensation layer, located above the micro-hole array layer, is used to compensate for chromatic aberration and distortion of the light passing through the light-transmitting holes.

[0020] Optionally, in the described under-screen imaging optical system with micro-holes, the optical compensation layer includes a first region and a second region; the first region and the second region have different compensation coefficients.

[0021] Optionally, in the described under-screen imaging optical system with micro-holes, the first region is located above the under-screen imaging module.

[0022] Optionally, in the described under-screen imaging optical system with micro-holes, the optical compensation layer is attached above the micro-hole array layer by optical thin film technology.

[0023] Optionally, in the described under-screen imaging optical system with micro-holes, the micro-hole array layer only allows light of a specific wavelength to pass through.

[0024] In a second aspect, the present utility model provides a palm-sweeping device, which is characterized by including the under-screen imaging optical system with micro-holes described in any one of the foregoing items.

[0025] Compared with the prior art, the present utility model has the following beneficial effects:

[0026] The present utility model utilizes the micro-hole array layer and the optical compensation layer to achieve an imaging effect with high light transmittance and low chromatic aberration; the high-sensitivity characteristic of the under-screen imaging sensor allows high-quality images to be obtained even under low-light conditions; the integrated design of the present utility model allows under-screen imaging to be achieved without sacrificing the integrity of the display screen, improving the aesthetics and user experience of the device. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative efforts. By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes, and advantages of the present utility model will become more obvious:

[0028] Figure 1 It is a schematic structural diagram of an under-screen imaging optical system with micro-holes in an embodiment of the present utility model;

[0029] Figure 2 It is a schematic structural diagram of another under-screen imaging optical system with micro-holes in an embodiment of the present utility model.

[0030] 1 - Display screen unit;

[0031] 2 - Microporous array layer;

[0032] 3 - Under - screen imaging module;

[0033] 4 - Optical compensation layer; Detailed implementation manners

[0034] The following will describe the present utility model in detail with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present utility model, but do not limit the present utility model in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made. These all belong to the protection scope of the present utility model.

[0035] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and above - mentioned drawings of the present utility model are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances, so that the embodiments of the present utility model described herein, for example, can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0036] An under - screen imaging optical system with micropores provided by an embodiment of the present utility model aims to solve the problems existing in the prior art.

[0037] The following will describe in detail the technical solution of the present utility model and how the technical solution of this application solves the above - mentioned technical problems with specific embodiments. These several specific embodiments below can be combined with each other, and for the same or similar concepts or processes, they may not be repeated in some embodiments. The following will describe the embodiments of the present utility model with reference to the drawings.

[0038] The present utility model utilizes advanced optical designs and principles to achieve a high - definition imaging effect while maintaining the integrity of the display screen.

[0039] Figure 1 It is a schematic structural diagram of an under - screen imaging optical system with micropores in an embodiment of the present utility model. As Figure 1 shown, an under - screen imaging optical system with micropores in an embodiment of the present utility model includes:

[0040] A display screen unit 1 for displaying images.

[0041] Specifically, the display screen unit is the basis of the entire optical system and is responsible for generating the image that the user sees. In smartphones and other mobile devices, the display screen unit is usually an LCD or OLED screen to provide high-resolution, high-color saturation, and low-power consumption display effects. The display screen unit can be a transparent display screen with high light transmittance or a traditional display screen with low light transmittance. When the display screen unit is a transparent display screen, it is more aesthetically pleasing but has a lower cost. When the display screen is a traditional display screen, a hole can be dug above the under-screen imaging module, or the light intensity of the supplementary light can be adjusted so that the under-screen imaging module can obtain sufficient light signals for imaging.

[0042] A micro-hole array layer 2 is arranged above the display screen unit and includes a plurality of light-transmitting holes to allow light to pass through.

[0043] Specifically, the micro-hole array layer is a special layer with a plurality of light-transmitting holes. It is arranged above the display screen unit to allow light to pass through these tiny holes. The key role of this layer is to provide necessary light for the under-screen imaging module without affecting the display effect. The design of the micro-holes should ensure that they are small enough to be invisible at normal viewing distances, while ensuring sufficient quantity and size to allow enough light to pass through. The size and arrangement of the micro-holes are precisely calculated to ensure sufficient light transmittance and imaging quality. The micro-hole array layer allows specific light to pass through, ensuring that the photosensitive element of the imaging module can receive sufficient light for imaging. The micro-hole array layer blocks other non-imaging light, reduces stray light and interference, and improves imaging clarity.

[0044] An under-screen imaging module 3 is arranged below the display screen unit for generating images.

[0045] Specifically, the under-screen imaging module is the core of the entire system. It is located below the display screen unit and generates images. The under-screen imaging module needs to have high sensitivity and high resolution to accurately capture and identify the images transmitted through the micro-hole array layer. In biometric technology, the under-screen imaging module also needs to be able to process tiny image details to achieve functions such as high-security identity recognition and authentication.

[0046] An under-screen imaging module typically includes a photosensitive element (such as a CMOS sensor), a lens group (which may include microlenses), and related image processing circuits, etc. When light passes through the microporous array layer and irradiates onto the photosensitive element, the imaging module captures this light and generates corresponding images. The photosensitive element is highly sensitive to light and can capture clear images in low-light environments. The integrated image processing circuit can perform real-time processing on the captured raw images, including denoising, enhancing contrast, and color correction, etc., to output high-quality images.

[0047] In some embodiments, the under-screen imaging module is located at the center of the display unit. Placing the imaging module at the center of the screen can ensure that after the light passes through the microporous array layer, it irradiates onto the photosensitive element in a relatively uniform manner, which helps to reduce imaging distortion or uneven brightness caused by differences in light paths. For scenarios where the area of the display unit is small, setting the under-screen imaging module at the center can also enhance the aesthetic feeling. This embodiment also takes into account the internal space planning of the device and the actual usage experience of users, making the application effect better.

[0048] In some embodiments, the microporous array layer includes a first array and a second array, and the first array and the second array have different array structures. The different structures of the first array and the second array can be optimized for different light conditions respectively. For example, the first array may be designed to improve the light transmittance to ensure sufficient light enters the imaging module; while the second array may be used to adjust the light distribution, reduce scattering and interference, and improve imaging clarity. Different array structures can also be used for color management. Certain wavelengths of light may have a greater impact on the imaging quality. Therefore, by adjusting the aperture size, shape, or arrangement of the array, the transmittance of these specific wavelengths of light can be optimized, thereby improving the accuracy and saturation of color reproduction. This embodiment enables the under-screen imaging system to more flexibly adapt to different usage scenarios and light environments. For example, in bright environments, more reliance can be placed on the light transmittance performance of the first array; while in low-light environments, more use can be made of the light adjustment ability of the second array. The aperture sizes of the first array and the second array can be different. Larger apertures can provide higher light transmittance but may increase scattering; while smaller apertures can reduce scattering but may reduce the light transmittance. By combining arrays with two aperture sizes, an optimal balance can be found between light transmittance and scattering. The hole shapes of the arrays can also be different. For example, the first array may use circular or square holes to provide a uniform light transmittance effect; while the second array may use more complex shapes, such as polygons or irregular shapes, to adjust the light distribution and direction. The hole arrangement ways of the first array and the second array can also be different. Regular arrangement ways (such as rectangular or hexagonal) can provide a uniform light transmittance effect but may lack flexibility; while irregular arrangement ways can more flexibly adjust the light distribution but may increase the manufacturing difficulty.

[0049] In some embodiments, the first array is located above the under-screen imaging module. This embodiment can optimize the imaging quality, improve the light transmittance, and enhance the performance of the overall system. The configuration of the first array above the under-screen imaging module can effectively manage and filter the light passing through, thereby improving the working efficiency and image quality of the imaging module. This design not only considers the optimization of optical performance but also ensures the compactness and efficiency of the device from a practical perspective.

[0050] Figure 2 This is a schematic structural diagram of another under-screen imaging optical system with micropores in the embodiments of the present invention. As Figure 2 shown, compared with the previous embodiments, another under-screen imaging optical system with micropores in the embodiments of the present invention further includes:

[0051] An optical compensation layer 4, located above the micropore array layer, for compensating the chromatic aberration and distortion of the light passing through the light-transmitting holes.

[0052] Specifically, in an under-screen imaging system, introducing an optical compensation layer is an important design element. It is located above the micropore array layer and is intended to compensate for the chromatic aberration and distortion that may occur during the propagation of the light passing through the light-transmitting holes. When light of different wavelengths passes through different media, its propagation speed and refraction angle will be different, which may lead to color deviation during imaging, that is, chromatic aberration. The optical compensation layer corrects this chromatic aberration through its specific optical properties, such as refractive index gradient or special optical coatings, so that light of different wavelengths can be focused more accurately on the photosensitive element of the imaging module, thereby improving the accuracy and saturation of color reproduction. Distortion correction: When light passes through the micropore array layer, it may generate certain distortion, such as barrel distortion or pillow distortion, due to factors such as the arrangement, shape, or size of the holes. The optical compensation layer corrects this distortion through its optical design, such as using an aspherical lens or special optical materials, so that the imaging result is more real and natural. The optical compensation layer needs to cooperate closely with the underlying micropore array layer to ensure that the light can pass through the display unit smoothly and be accurately projected onto the imaging module after compensation. This requires high-precision alignment and fitting during the manufacturing and installation processes of the two.

[0053] In some embodiments, the optical compensation layer includes a first region and a second region; the first region and the second region have different compensation coefficients. When the optical compensation layer is designed to include a first region and a second region with different compensation coefficients, this design further enhances its ability to correct chromatic aberration and distortion of light. Since different regions through which light passes in the under-screen imaging system may be affected differently (such as differences in the microporous array layer structure at different positions, the influence of the display pixel layout, etc.), dividing the optical compensation layer into regions with different compensation coefficients can more specifically compensate for the chromatic aberration and distortion caused by these differences. By precisely controlling the compensation coefficients of each region, the color reproduction of the entire imaging region can be made more accurate and the distortion can be better corrected, thus significantly improving the imaging quality. The different compensation coefficients of the first region and the second region mean that their degrees and ways of correcting light are different. The compensation coefficient is usually related to factors such as the refractive index, thickness, shape of the material, and the characteristics of the optical coating. There are also differences in the layout and shape of the two regions to adapt to different imaging requirements and light conditions. For example, the first region may be optimized for the central region of imaging, while the second region may correct for the edge region.

[0054] In some embodiments, the first region is located above the under-screen imaging module. When the first region is located above the under-screen imaging module, this layout further strengthens the direct influence and optimization effect of the optical compensation layer on the imaging module. Since the first region is directly above the under-screen imaging module, it can most directly correct the light that passes through the microporous array layer from the display unit and enters the imaging module. This direct correction can more effectively reduce chromatic aberration and distortion and improve the clarity and accuracy of imaging. In the imaging system, the imaging quality of the core region (usually the central part of the imaging module) is crucial for the overall imaging effect. Placing the first region above the imaging module can ensure that the light in the core region is optimally corrected, thus improving the quality of the entire imaging screen.

[0055] In some embodiments, the optical compensation layer is attached above the microporous array layer by optical thin film technology. When the optical compensation layer is attached above the microporous array layer by optical thin film technology, this attachment method not only ensures the tight integration between the optical compensation layer and the microporous array layer, but also provides good optical performance and stability. Optical thin film technology can achieve a high-precision attachment process, ensuring the alignment accuracy and fit between the optical compensation layer and the microporous array layer. This is crucial for an optical system because any slight misalignment may lead to a significant degradation in imaging quality. The optical compensation layer attached by optical thin film technology has a highly uniform thickness, shape, and optical properties over a large area. This uniformity helps to achieve a consistent and reliable compensation effect, reducing chromatic aberration and distortion in imaging. Optical thin films usually have good wear resistance, corrosion resistance, and weather resistance, which can protect the underlying microporous array layer and imaging module from the influence of the external environment. This extends the service life of the entire imaging system and improves its stability.

[0056] In some embodiments, the microporous array layer only allows light of a specific wavelength to pass through. When the microporous array layer is designed to only allow light of a specific wavelength to pass through, this property brings higher selectivity and control ability to the under-screen imaging system. The microporous array layer filters light through its unique structure (such as pore size, shape, arrangement, and possible optical coatings), allowing only light of a specific wavelength to pass through. This spectral selectivity helps to reduce the interference of non-target wavelength light and improve the clarity and color accuracy of imaging. In an under-screen imaging system, specific wavelengths are often associated with specific imaging effects. For example, certain wavelengths may be more suitable for capturing skin details, while others may be more suitable for enhancing color saturation. By allowing these specific wavelength light to pass through, the microporous array layer can optimize the imaging effect and meet different shooting requirements.

[0057] In some embodiments, the under-screen imaging module has at least two cameras and receives light of different wavelengths. Each camera is designed to be sensitive to light of a specific wavelength, so the entire system can capture a wider range of spectral information. This multi-spectral imaging ability enables the imaging system to more accurately restore the color, texture, and details of an object, improving the realism and three-dimensionality of the imaging. By combining the data captured by different cameras, algorithms can be used for image fusion and optimization to further enhance the imaging effect. For example, high-definition details captured by one camera and rich color information captured by another camera can be used to generate a more realistic and vivid image. The multi-camera system can be flexibly adjusted according to different shooting environments and requirements. For example, in a dimly lit environment, a camera sensitive to infrared light can be enabled to enhance the brightness and clarity of the imaging; while when fine texture needs to be captured, a camera with high resolution can be enabled.

[0058] The embodiment of the present utility model also provides a palm-sweeping device, which includes the under-screen imaging optical system with micropores described in any one of the foregoing items. The palm-sweeping device of this embodiment skillfully combines optical imaging technology and biometric technology, realizing the precise capture and recognition of palm features, and escorting the safety and convenience of users. The palm-sweeping device of this embodiment mainly works through its built-in under-screen imaging optical system with micropores. This system is located under the screen of the device or within a specific sensing area, without occupying extra space, and maintaining the overall beauty and portability of the device. When the user places the palm at the designated position, the under-screen imaging optical system with micropores will be immediately activated to quickly and accurately image and recognize the palm. The palm-sweeping device in this embodiment has the characteristics of high-precision imaging, non-contact operation, fast response, and high security. It is applicable to various application scenarios such as mobile payment, access control systems, and unlocking of personal devices.

[0059] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0060] The specific embodiments of the present utility model have been described above. It should be understood that the present utility model is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which do not affect the essence of the present utility model.

Claims

1. An under-screen imaging optical system with micro-holes, characterized in that: include: A display unit, used for displaying images; A micro-hole array layer, disposed above the display unit, comprising a plurality of light-transmitting holes to allow light to pass through; The under-screen imaging module is arranged below the display screen unit and is used to generate images.

2. The under-screen imaging optical system with micro-aperture according to claim 1, characterized in that: The under-screen imaging module is located in the center of the display screen unit.

3. The under-screen imaging optical system with micro-aperture according to claim 1, characterized in that: The micropore array layer includes a first array and a second array, and the first array and the second array have different array structures.

4. The under-screen imaging optical system with micro-aperture according to claim 3, characterized in that: The first array is located above the under-screen imaging module.

5. The under-screen imaging optical system with micro-aperture according to claim 1, characterized in that: Also includes: The optical compensation layer is located above the microhole array layer and is used to compensate for the chromatic aberration and distortion of the light passing through the light-transmitting holes.

6. The under-screen imaging optical system with micro-aperture according to claim 5, characterized in that: The optical compensation layer includes a first region and a second region; the first region and the second region have different compensation coefficients.

7. The under-screen imaging optical system with micro-aperture according to claim 6, characterized in that: The first area is located above the under-screen imaging module.

8. The under-screen imaging optical system with micro-aperture according to claim 6, characterized in that: The optical compensation layer is attached on the microhole array layer by optical film technology.

9. The under-screen imaging optical system with micro-aperture according to claim 1, characterized in that: The microporous array layer allows only light of a specific wavelength to pass through.

10. A palm brushing device, characterized in that: A under-screen imaging optical system with microholes comprising the one described in any one of claims 1-9.

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