Brush palm equipment with lateral projection light supplement function
By laterally projecting fill light, the total reflection surface of the light guide ring is used to change the direction of the light, which solves the problem of uneven fill light when the display screen exists, and achieves uniform illumination and recognition accuracy of palm images.
Patent Information
- Application Number
- CN202422202904.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-09
AI Technical Summary
When existing palm brushing equipment is equipped with display screens and other components, the light guide ring cannot fill up evenly, resulting in unclear palm images.
The lateral projection fill light method is adopted to change the direction of the light through the total reflection surface of the light guide ring, so that the light is evenly emitted from the outgoing surface, bypassing the connecting parts, and ensuring consistent light.
In the presence of the display screen, uniform illumination of the palm image is achieved, improving image clarity and recognition accuracy.
Smart Images
Figure CN223092441U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of palm brushing, and particularly to a palm brushing device with lateral projection for supplementary lighting. Background Art
[0002] As a new biometric technology, the palm brushing device has broad application prospects. Its application fields include but are not limited to the following aspects:
[0003] Access control system: In places such as office buildings, residential communities, and industrial parks, the palm brushing device can be used in the access control system to efficiently and securely authenticate and manage the identities of people entering and leaving. Through palmprint and palm vein recognition technologies, it ensures that only authorized personnel can enter and leave specific areas.
[0004] Mobile payment: Palm brushing payment is the application of the palm brushing device in the payment field. Users only need to place their palms on the palm brushing device to achieve fast and secure payment operations. This payment method eliminates the need to carry a mobile phone or wallet, improving the convenience and security of payment.
[0005] Smart campus: On campus, the palm brushing device can be used for identity verification and attendance management of students, teachers, and logistics staff. By brushing the palm, the identities of people entering and leaving the campus can be verified, and attendance information can be accurately recorded.
[0006] Digital healthcare: Inside the hospital, the palm brushing device can be used in scenarios such as key drug management, doctor and nurse shift attendance, etc. In addition, it can also be used for patient identity verification and medical record management, as well as registration and payment, improving the efficiency and security of medical services.
[0007] New retail: In retail places such as shopping malls or supermarkets, customers can use the palm brushing device for membership registration and consumption payment to enjoy a more convenient shopping experience.
[0008] Smart city: In the construction of a smart city, the palm brushing device can provide more efficient and secure access management for public facilities such as libraries and gymnasiums. At the same time, it can also be used in scenarios such as urban one-stop services and bus payment systems to enhance the intelligent level of urban management.
[0009] In practical applications, the palm brushing device usually combines visible light supplementary lighting and infrared supplementary lighting technologies to ensure high-quality palmprint and palm vein images can be obtained under various lighting conditions. At the same time, the palm brushing device is also equipped with advanced image processing algorithms and recognition algorithms, which can quickly and accurately analyze and process the collected images, thereby realizing efficient and secure identity verification and payment operations.
[0010] During the recognition process of the palm brushing device, in order to improve the accuracy and stability of recognition, a supplementary lighting technique is usually adopted. The supplementary lighting technique mainly includes two types: visible light supplementary lighting and infrared supplementary lighting:
[0011] Visible light supplementary lighting: The palm is supplemented with light through a visible light source, making features such as palm prints and palm veins more clearly visible. This supplementary lighting method is suitable for scenarios with relatively dim light or palms with a darker color.
[0012] Infrared supplementary lighting: The palm is supplemented with light using an infrared light source. Since infrared light can penetrate the skin surface, internal features such as palm veins can be captured more accurately. The infrared supplementary lighting technique is of great significance for improving the accuracy and stability of recognition.
[0013] To obtain a clear palm image, a uniform supplementary lighting effect is often required. In the prior art, a light guide ring is often used for light homogenization. However, when the palm brushing device is provided with components such as a display screen, due to connections, etc., the light guide ring cannot perform supplementary lighting evenly.
[0014] 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. 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 inventiveness of this application. Content of the Utility Model
[0015] Therefore, in the present utility model, the supplementary light lamp emits light laterally. The light guide ring changes the direction of the light of the supplementary light lamp through a total reflection surface and finally emits it evenly from the light exit surface, bypassing the connecting components, and achieving the best light homogenization effect through consistent illumination in all directions, which is beneficial to obtaining a clearer palm image.
[0016] The present utility model provides a palm brushing device with lateral projection supplementary lighting, which is characterized by comprising:
[0017] A display screen, including a main body and a protruding connecting component;
[0018] A light guide ring, including a light exit surface, located outside the display screen and surrounding the display screen, for guiding light to the light exit surface for uniform emission;
[0019] A supplementary light lamp, for emitting light towards the light guide ring;
[0020] The light guide ring further includes a total reflection surface for guiding the light of the supplementary light lamp to the light exit surface.
[0021] Optionally, in the palm brushing device with lateral projection supplementary lighting, the low point position of the total reflection surface is lower than the high point of the connecting component.
[0022] Optionally, in the described palm-sweeping device with lateral projection for supplementary lighting, the connecting component protrudes in a direction parallel to the surface of the display screen.
[0023] Optionally, in the described palm-sweeping device with lateral projection for supplementary lighting, the light guide ring includes a groove for placing the connecting component.
[0024] Optionally, in the described palm-sweeping device with lateral projection for supplementary lighting, a filling body is arranged outside the total reflection surface; the filling body is connected to the light guide ring and the body.
[0025] Optionally, in the described palm-sweeping device with lateral projection for supplementary lighting, the diameter of the body is not greater than 50 cm, and the cross-sectional end point of the light-emitting surface is not the highest point of the light-emitting surface.
[0026] Optionally, in the described palm-sweeping device with lateral projection for supplementary lighting, the diameter of the body is not less than 50 cm, and at least one end point of the cross-section of the light-emitting surface is the highest point or the lowest point of the light-emitting surface.
[0027] Optionally, in the described palm-sweeping device with lateral projection for supplementary lighting, the diameter of the body is not less than 70 cm, and one end point of the cross-section of the light-emitting surface is the highest point of the light-emitting surface.
[0028] Optionally, in the described palm-sweeping device with lateral projection for supplementary lighting, the cross-section of the total reflection surface is arc-shaped.
[0029] Optionally, in the described palm-sweeping device with lateral projection for supplementary lighting, the thickness of the connecting component is a fixed value.
[0030] Compared with the prior art, the present utility model has the following beneficial effects:
[0031] In the present utility model, the supplementary light lamp emits light laterally. The light guide ring changes the direction of the light of the supplementary light lamp through the total reflection surface and finally emits the light uniformly from the light-emitting surface, bypassing the connecting component, and has a high light utilization efficiency.
[0032] Through the unified optical path design in the present utility model, uniform optical path illumination can also be achieved for irregular display screens. The best light homogenization effect is obtained through consistent illumination in all directions, which is beneficial to obtaining a clearer palm image. Description of the Drawings
[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings. By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes, and advantages of the present invention will become more obvious:
[0034] Figure 1 Schematic structural diagram of a palm-sweeping device with lateral projection for supplementary lighting in an embodiment of the present invention;
[0035] Figure 2 Schematic cross-sectional structure diagram of a palm-sweeping device with lateral projection for supplementary lighting in an embodiment of the present invention;
[0036] Figure 3 Schematic cross-sectional structure diagram of another palm-sweeping device with lateral projection for supplementary lighting in an embodiment of the present invention;
[0037] Figure 4 Schematic cross-sectional diagram of a light guide ring in an embodiment of the present invention;
[0038] Figure 5 Schematic cross-sectional diagram of another light guide ring in an embodiment of the present invention.
[0039] 1 - Display screen;
[0040] 2 - Light guide ring;
[0041] 3 - Supplementary light;
[0042] 4 - Connecting component;
[0043] 5 - Total reflection surface;
[0044] 6 - Groove;
[0045] 7 - Filling body;
[0046] 8 - Body;
[0047] 9 - Light-emitting surface; Detailed implementation manners
[0048] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made. These all belong to the protection scope of the present invention.
[0049] In the description, claims, and the above-mentioned drawings of the present utility model, terms such as "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such 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.
[0050] A palm-sweeping device with lateral projection for supplementary lighting provided by an embodiment of the present utility model aims to solve the problems existing in the prior art.
[0051] The technical solution of the present utility model and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present utility model will be described below with reference to the drawings.
[0052] In the present utility model, the supplementary light lamp emits light laterally. The light guide ring changes the direction of the light of the supplementary light lamp through the total reflection surface and finally emits it evenly from the light-emitting surface, bypassing the connecting component, and achieving the best light homogenization effect through the uniform light in all directions, which is beneficial to obtaining a clearer palm image.
[0053] Figure 1 It is a schematic structural diagram of a palm-sweeping device with lateral projection for supplementary lighting in an embodiment of the present utility model. As Figure 1 shown, a palm-sweeping device with lateral projection for supplementary lighting in an embodiment of the present utility model includes:
[0054] A display screen 1, including a main body 8 and a protruding connecting component 4.
[0055] Specifically, the main body is the main part of the display screen, responsible for displaying images, information, or guiding the user operation interface. In the palm-sweeping device, the display screen is used to display information such as the palm-sweeping status of the user, the recognition result, or the system prompt. In some embodiments, sensors are also provided inside or below the display screen for collecting palm signals. The protruding connecting component is used to support or fix the display screen and can be used to connect the display screen with other components for communication, etc. The protruding design helps to enhance the structural stability and also provides hardware support for the control of the display screen.
[0056] The light guide ring 2 includes a light-emitting surface 9, which is located outside the display screen 1 and surrounds the display screen 1, and is used to guide light to the light-emitting surface 9 for uniform emission.
[0057] Specifically, the light-emitting surface is the surface of the light guide ring, which is specially designed to scatter light evenly. This surface directly faces the user's palm, ensuring that during the palm-sweeping process, the palm is evenly and softly illuminated, reducing shadows and reflections and improving image quality. Inside the light guide ring, there is a series of reflecting surfaces or optical fibers, which are used to efficiently guide the light emitted by the fill light to the light-emitting surface and achieve uniform distribution of light through a complex structure. In this way, even if the position of the fill light is not directly aligned with the palm, sufficient illumination of the palm can be ensured.
[0058] The fill light 3 is used to emit light towards the light guide ring.
[0059] Specifically, the fill light is the light source of the entire optical system, and usually an LED (light-emitting diode) is used as the light-emitting element because LEDs have the advantages of low power consumption, long lifespan, and high luminous efficiency. The fill light is placed on one side or a specific position of the light guide ring, and the light is sent into the light guide ring by lateral projection. The brightness and color temperature of the fill light can be adjusted according to needs to adapt to different ambient light and usage scenarios. For example, increase the brightness in low-light environments and appropriately reduce the brightness in high-light environments to maintain the lighting stability of the palm recognition area.
[0060] As Figure 2 shown, the light guide ring further includes a total reflection surface 5, which is used to guide the light of the fill light to the light-emitting surface. The total reflection surface is located inside the light guide ring and is designed with a specific geometric shape (such as a wedge shape, trapezoid, etc.) and a reflective material (such as silver plating, aluminum plating, etc.), which are used to efficiently guide the light emitted by the fill light to the light-emitting surface. The total reflection surface ensures that the light can be evenly distributed over the entire light-emitting surface by precisely controlling the propagation path of the light, avoiding the light being too concentrated or scattered.
[0061] In some embodiments, the low point position of the total reflection surface is lower than the high point of the connecting component. The low point of the total reflection surface refers to the lowest position of the total reflection surface inside the light guide ring. Since the light guide ring is usually designed as an annular component with a certain thickness and internal structure, the internal total reflection surface will form different shapes and height variations according to design requirements. The low point position is a key point among these variations, which determines the path along which the light can be guided and reflected after entering the light guide ring. The low point position of the total reflection surface being lower than the high point of the connecting component makes full use of the space around the connecting component, making the structure of the palm-sweeping device more compact.
[0062] In some embodiments, the connecting component protrudes in a direction parallel to the surface of the display screen. The connecting component does not protrude perpendicular to the surface of the display screen, but protrudes outward in a direction parallel to the surface of the display screen. This means that the connecting component extends on the same horizontal plane as the edge portion of the display screen, without increasing the thickness of the device in the vertical direction. The protruding connecting component can, to a certain extent, protect the display screen from direct external impacts or scratches, especially when the device is accidentally dropped or collided. By tightly connecting with the peripheral structure, the protruding connecting component helps to enhance the structural stability of the entire device and reduce deformation caused by vibration or external forces.
[0063] In some embodiments, the light guide ring includes a groove 6 for placing the connecting component. The design of the groove enables the connecting component to be precisely embedded therein, maximizing the use of space. This connection method helps to reduce the problem of structural looseness caused by excessive gaps between components. It should be noted that the groove in this embodiment is not used to fix the connecting component, but a groove is set by utilizing the property of total reflection to make full use of space and make the structure of the palm brushing device more compact.
[0064] In some embodiments, as Figure 3 shown, a filling body 7 is provided outside the total reflection surface; the filling body is connected to the light guide ring and the body. The filling body does not participate in the processing of the light path. Due to the characteristics of the connecting component and the total reflection surface, the total reflection surface is often an inclined surface or a curved surface with a lower point outside and a higher point inside. This structure easily causes the total reflection surface to be exposed outside, damaged in space, and the appearance seen by the user from the outside is not beautiful. The filling body is arranged on one side of the light guide ring close to the total reflection surface. On the one hand, it plays a role in protecting the total reflection surface, and on the other hand, it is connected to the light guide ring, making the palm brushing device more beautiful. Preferably, the filling body has the same material or color as the light guide ring.
[0065] In some embodiments, the diameter of the body 8 is not greater than 50 cm, and the cross-sectional end point of the light-emitting surface is not the highest point of the light-emitting surface. As Figure 1 and Figure 2 shown, when the diameter of the body is not greater than 50 cm, the palm brushing device is small in size. Designing the light-emitting surface as a curved surface protruding upward can enable the palm to be well illuminated at both relatively close and relatively far distances, thereby obtaining a relatively uniform palm image. In this embodiment, when the body is circular, the diameter of the circle is the diameter of the body. When the body is not circular, the diameter refers to the equivalent diameter of the area of the body. For example, when the body is square with an area of a, the diameter of the circle with an area of a is the equivalent diameter, that is, the diameter of the square. The diameter in subsequent embodiments is the same as that in this embodiment and will not be elaborated in the subsequent part.
[0066] In some embodiments, the diameter of the body is not less than 50 cm, and at least one end point of the cross-section of the light-emitting surface is the highest or lowest point of the light-emitting surface. As Figure 4 and Figure 5 shown, when the diameter of the body is not less than 50 cm, the shape of the light-emitting surface can be set according to the specific size of the palm-sweeping device, but at least one end point is the highest or lowest point of the light-emitting surface. When one end point is the highest point, usually the highest point is the outer end point to ensure that the light converges inward to illuminate the palm. When one end point is the lowest point, usually the lowest point is the inner end point to ensure that the light converges inward to illuminate the palm.
[0067] In some embodiments, the diameter of the body is not less than 70 cm, and one end point of the cross-section of the light-emitting surface is the highest point of the light-emitting surface. As Figure 4 and Figure 5 shown, when the diameter of the body is not less than 70 cm, the size of the palm-sweeping device is relatively large, and the design of the light-emitting surface can be more flexible. In this embodiment, the outer end point of the light-emitting surface is the highest point, so that the light has a stronger converging effect in the middle of the palm, making the image in the middle of the palm clearer.
[0068] In some embodiments, the cross-section of the total reflection surface is arc-shaped. The arc-shaped cross-section can effectively guide the light to be reflected and transmitted inside the light guide ring. Due to the special shape of the arc, the light will be reflected at a specific angle and path when it contacts this surface, ensuring that the light can be evenly distributed to the light-emitting surface and improving the lighting effect. Compared with other shapes, the arc-shaped cross-section may have fewer edges and mutation points, which helps to reduce the scattering and loss of light during transmission. The light can propagate more efficiently along the preset path, improving the utilization rate of light energy. By adjusting the curvature and position of the arc, the reflection angle and direction of the light can be precisely controlled. This is of great significance for achieving specific lighting effects (such as uniform lighting, directional lighting, etc.).
[0069] In some embodiments, the thickness of the connecting component is a fixed value. When the thickness of the connecting component is a fixed value, it means that during the entire design or manufacturing process, the thickness dimension of this component remains unchanged and does not change with the variation of other factors (such as position, force application conditions, etc.). A connecting component with a fixed thickness is easier to control the dimensions and accuracy during the manufacturing process, thereby simplifying the production process. This helps to reduce the manufacturing cost and improve the production efficiency. Since the thickness of the connecting component is fixed, the structural consistency of each component can be ensured. This helps to maintain the stability and reliability of the overall performance of the device. The connecting component with a fixed thickness is more convenient for installation and maintenance. Because they have uniform dimensions and specifications, they can be more easily matched and replaced with other components. Consistent connecting components contribute to the consistency of the optical path, making the outgoing optical path more uniform. Stable connecting components help to maintain the stability of the overall structure of the device, thereby contributing to improving the quality of image acquisition and the recognition accuracy. Because a stable structure can reduce problems such as image blurring and deformation caused by vibration or loosening.
[0070] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made 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.
[0071] 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 implementation manners. 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. A palm-sweeping device with lateral projection for supplementary lighting, characterized in that, Comprising: A display screen, including a main body and a protruding connecting component; A light guide ring, including a light-emitting surface, located outside the display screen and surrounding the display screen, for guiding light to the light-emitting surface for uniform emission; A supplementary light, for emitting light towards the light guide ring; The light guide ring further includes a total reflection surface, for guiding the light of the supplementary light to the light-emitting surface.
2. The palm brushing device with lateral projection for supplementary lighting according to claim 1, characterized in that, The low point position of the total reflection surface is lower than the high point of the connecting component.
3. The palm-brushing device with lateral projection for supplementary lighting according to claim 1, characterized in that The connecting component protrudes in a direction parallel to the surface of the display screen.
4. The palm brushing device with lateral projection for supplementary lighting according to claim 1, characterized in that, The light guide ring includes a groove, and the groove is used for placing the connecting component.
5. The palm brushing device with lateral projection for supplementary lighting according to claim 1, characterized in that, A filling body is arranged outside the total reflection surface; the filling body is connected to the light guide ring and the main body.
6. The palm brushing device with lateral projection for supplementary lighting according to claim 1, characterized in that, The diameter of the main body is not greater than 50 cm, and the cross-sectional end point of the light-emitting surface is not the highest point of the light-emitting surface.
7. The palm-brushing device with lateral projection for supplementary lighting according to claim 1, characterized in that, The diameter of the main body is not less than 50 cm, and at least one end point of the cross-section of the light-emitting surface is the highest point or the lowest point of the light-emitting surface.
8. The palm brushing device with lateral projection for supplementary lighting according to claim 1, characterized in that The diameter of the main body is not less than 70 cm, and one end point of the cross-section of the light-emitting surface is the highest point of the light-emitting surface.
9. The palm brushing device with lateral projection for supplementary lighting according to claim 1, characterized in that, The cross-section of the total reflection surface is arc-shaped.
10. The palm brushing device with lateral projection for supplementary lighting according to claim 1, characterized in that, The thickness of the connecting component is a fixed value.